JP4726764B2 - Measuring device - Google Patents

Description

  The present invention relates to a measuring device for measuring the concentration of dust contained in a detection fluid, the flow velocity of the fluid, and the like.

  Conventionally, as a measuring device for measuring the concentration of dust contained in a gas (for example, city gas, LP gas, etc.) flowing in a pipe (for example, a gas pipe), the measurement light is guided to the detection unit. It is known that a detection region is irradiated from an irradiation unit, reflected light from the detection region is received by a light receiving unit, and the reflected detection light is guided to a signal processing unit (for example, see Patent Document 1). . In such a measuring apparatus, an optical fiber is used as a transmission member for guiding the measurement light and the detection light, and the measurement light and the detection light are transmitted through the optical fiber.

JP 2004-205217 A

  In such a measuring device, when measuring the concentration of dust contained in the gas flowing in the pipe, the detector is inserted into the pipe detection area through the insertion pipe, Although the concentration of dust is measured, when the pressure in the pipe is high, it becomes difficult to insert the detection unit to the detection region as required. In particular, when the length of the insertion tube is long, the length of the optical transmission member for guiding the measurement light to the detection unit and the optical transmission member for guiding the detection light received by the detection unit to the signal processing means are increased. In connection with that, it becomes more difficult to guide the detection section to the detection area of the pipe as required.

  Such a problem also exists in a measuring device for measuring the flow velocity of the liquid flowing in the pipe. In the measuring device for detecting the flow velocity of the fluid, a flow velocity sensor is provided in the detection portion, and a detection signal from the flow velocity sensor is sent to the signal processing means through a conductive cable as a transmission member.

An object of the present invention is to provide a measuring device that can insert a detecting portion into a detecting region through the insertion tube as required even when the fluid pressure in the pipe is high.
Another object of the present invention is to provide a measuring device that can reliably guide a detection unit to a detection region with a relatively simple configuration.

The measuring apparatus according to claim 1 of the present invention is a measuring apparatus that measures a detection target by guiding a detection unit for measuring the detection target through the insertion tube to the detection region,
A tip unit having the detection unit, a connection unit detachably connected to the tip unit, signal processing means for processing a detection signal from the detection unit as required, the detection unit and the signal A transmission member for connecting the processing means,
The tip unit and the connection unit are configured to be inserted by a unit insertion device so that the detection unit is located in the detection region,
The unit insertion device includes an attachment main body attached to the insertion tube, a pressing body movable in a direction approaching and separating from the attachment main body, and a space between the attachment main body and the pressing body. An interposed hoist,
When the detection unit is inserted into the detection region, the distal end portion of the connection unit is detachably connected to the rear end portion of the distal end unit. When the hoist is inserted in this state, the pressing body is attached to the mounting body. The connection unit is inserted by moving in a direction close to the portion.

  Moreover, in the measuring device according to claim 2 of the present invention, the unit insertion device includes an upper wall member disposed at a distance in a predetermined direction with respect to the attachment main body, the upper wall member, and the A pair of guide rods provided between the mounting main body portion, the pressing body is movably supported by the pair of guide rods, and when the hoist is inserted, the pressing body is the pair of guide rods It moves to the direction which adjoins to the said attachment main-body part along, and inserts the said connection unit, It is characterized by the above-mentioned.

  Moreover, in the measuring apparatus according to claim 3 of the present invention, the attachment main body portion includes a base member attached to the insertion tube, and a turn that is rotatably attached to the base member over a predetermined range. A pressing member that is movably supported by the pair of guide rods, a pressing member that presses the connection unit, and a space between the moving member and the pressing member. And the pair of guide rods are provided between the base member and the upper wall member, and the hoist is interposed between the swivel support member and the moving member. It is characterized by that.

  Moreover, in the measuring device according to claim 4 of the present invention, the pressing body is provided with a locking means for acting on the upper wall member to lock and hold the pressing body in the raised position, and the locking means. Has a lock member mounted on the pressing body so as to be movable between a lock position acting on the upper wall member and a retracted position retracting from the upper wall member.

  In the measuring device according to claim 5 of the present invention, a first attachment member is attached to the attachment main body, a second attachment member is attached to the pressing body, and the first attachment member and the first attachment member are attached. Between the two attachment members, a movement restraining member for holding the pressing body in the lowered position is detachably mounted.

  In the measuring device according to claim 6 of the present invention, the attachment main body is provided with an insertion member having an insertion hole for inserting the connection unit, and the insertion member is provided with an insertion holding hole. The insertion holding hole extends through a part of the insertion hole, and an insertion concave portion is provided in a rear end portion of the tip unit and the connection unit, and a rear end portion of the tip unit is When the holding pin is inserted through the insertion holding hole in the state of being located in the insertion member, the holding pin extends through the insertion recess of the tip unit, and the rear end portion of the connection unit is in the insertion member. When the holding pin is inserted through the insertion holding hole in the positioned state, the holding pin extends through the insertion recess of the tip unit.

  Furthermore, in the measuring device according to claim 7 of the present invention, a pair of hoists is provided between the attachment main body portion and the pressing body, and each of the pair of hoists includes an operation lever, A load sheave rotated by operation of an operation lever; and a ratchet mechanism provided in association with the load sheave, the ratchet mechanism rotating integrally with the load sheave; and the ratchet wheel A ratchet pawl that is releasably engaged with the ratchet pawl, and a latch that is movably provided between a release position that acts on the ratchet pawl to release the engagement with the ratchet wheel and a retreat position that retreats from the ratchet pawl. An engagement release member and a movement prevention member for preventing the engagement release member from moving to the release position are provided.

  In the measuring device according to the first aspect of the present invention, the tip unit and the connection unit having the detection unit are configured to be inserted through the insertion tube by the unit insertion device. The unit and the connecting unit can be easily inserted, and can be inserted even if the fluid pressure in the pipe is high. Further, the unit insertion device includes an attachment main body portion attached to the insertion tube, a pressing body for pressing the rear end portion of the connection unit, and a hoist interposed between the attachment main body portion and the pressing body. Therefore, by inserting the hoist, it is possible to move the pressing body to the mounting main body side and insert the connection unit through the insertion tube. For example, with a relatively simple configuration using a commercially available hoist, The detection unit of the tip unit can be inserted into the detection region via the connection unit.

  According to the measuring apparatus of the second aspect of the present invention, the unit insertion device includes a pair of guide rods provided between the upper wall member and the attachment main body, and the pressing body is a pair of guide rods. Since the hoist is inserted and operated, the pressing body can be moved smoothly along the pair of guide rods toward the mounting body, thereby easily inserting the connection unit. can do.

  Moreover, according to the measuring apparatus of Claim 3 of this invention, an attachment main-body part is equipped with a base member and the turning support member with which this base member was rotatably mounted | worn, and a press body is A movable member supported movably by the pair of guide rods, a pressing member, and a joint means interposed therebetween; the pair of guide rods are provided between the base member and the upper wall member; Since the hoist is interposed between the swivel support member and the moving member, the swivel support member, the moving member and the hoist can be swung with respect to the base member of the mounting main body. A state can be made into a desired state.

  Further, according to the measuring device of the fourth aspect of the present invention, since the locking member is provided on the pressing body, the locking member of the locking member is held at the locking position and is applied to the upper wall member. The pressing body can be locked and held in the raised position.

  Further, according to the measurement device of the fifth aspect of the present invention, since the movement restraining member is detachably mounted between the first mounting member of the mounting body and the second mounting member of the pressing body, The pressing body can be held at the lowered position by the movement restraining member.

  According to the measuring device of the sixth aspect of the present invention, the mounting body is provided with an insertion member having an insertion hole, and the insertion member has an insertion holding hole extending through a part of the insertion hole. Since the insertion recess is provided in the rear end portion of the tip unit (and the connection unit), the insertion holding hole in the state where the rear end portion of the tip unit (and the connection unit) is located in the insertion member. When the holding pin is inserted through the holding pin, the holding pin extends through the insertion recess of the tip unit (and the connection unit), and the inserted holding pin can prevent the tip unit (and the connection unit) from coming off from the insertion member.

  Furthermore, according to the measuring device of the seventh aspect of the present invention, the ratchet mechanism of each hoist includes a ratchet wheel that rotates integrally with the load sheave, and a ratchet pawl that is releasably engaged with the ratchet wheel. A movement blocking member for blocking the movement of the disengagement member for releasing the engagement of the ratchet pawl to the release position is provided, so that the ratchet pawl is reliably released by the movement blocking member. Therefore, sufficient safety in operation can be ensured.

  Hereinafter, an embodiment of a measuring device according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view schematically showing a state in which a detection unit of a measurement device is inserted through an insertion pipe into a detection region of a pipe, and FIG. 2 shows a detection unit of the measurement device of FIG. 1 and a configuration related thereto. FIG. 3 is a partial cross-sectional view, FIG. 3 is a perspective view showing a unit insertion device for inserting a connection unit, and FIG. 4 shows the unit insertion device of FIG. 3 in a state where the moving member is located at the raised position. FIG. 5 is a front view showing the insertion device of FIG. 3 in a state in which the moving member is located at the lowered position, and FIG. 6 is a diagram showing a lock means of the unit insertion device of FIG. 7 is a partial cross-sectional view showing a state when the locking means of FIG. 6 is in an unlocked state, and FIG. 8 is a state when the moving member is raised to the vicinity of the raised position. FIG. 9 is a partial cross-sectional view showing FIG. FIG. 10 is a perspective view showing a hoist in the knit insertion device, FIG. 10 is a front view showing a part of the hoist in FIG. 9, FIG. 11 is a right side view showing the hoist in FIG. 9, and FIG. FIG. 13 is a cross-sectional view illustrating a connection unit, FIG. 13 is a cross-sectional view for explaining a connection operation when a pair of connection units are connected, and FIG. 14 illustrates a connection operation between the tip unit and the connection unit. 15 (a) is a partial cross-sectional view showing a state in which the rear end portion of the tip unit is held by the insertion member of the unit insertion device of FIG. 3, and FIG. It is a perspective view which shows the holding pin in the unit insertion apparatus of FIG.

  Referring to FIGS. 1 to 4, the illustrated dust measuring device 2 as a measuring device is a gas (for example, city gas, or the like) that flows in a fluid flow path 8 defined by a pipe 6 of the fluid piping structure 4, for example, an embedded gas pipe. It is used to measure the concentration of dust contained in LP gas). The dust measuring device 2 includes a front end unit 10 and a connection unit 12 (see FIGS. 4 and 12 to 14) that is detachably coupled to a rear end portion of the front end unit 10. In this embodiment, as will be described later, a connection unit 12 is detachably connected to the tip unit 10, and one or more other connection units 12 are connected to the connection unit 12, but these connection units 12 are the same. It is the composition.

  In the illustrated embodiment, a diffusion pipe 16 is connected to a predetermined portion of the pipe 6 of the fluid piping structure 4, and an open / close ball valve 18 is provided on the diffusion pipe 16. The diffusion tube 16 functions as an insertion tube for inserting the detection unit 20 of the tip unit 10 into the detection region R in the pipe 6, and the detection unit 20 of the tip unit 10 passes through the diffusion tube 16 in the pipe 6 as will be described later. Inserted into the detection region R.

  Referring mainly to FIG. 2, the detection unit 20 of the tip unit 10 includes a detection unit main body 22. The tip unit 10 includes a tip protection member 24, and first and second transmission member members 26 and 28 disposed in the tip protection member 24, and the first and second transmission members 26 and 28 are the first. And the second optical fibers 27 and 29, and the tip protection member 24 is composed of a flexible tube 30 formed of a metal such as stainless steel and a metal mesh tube 31 covering the flexible tube 30, and the tip protection member The detection part main body 22 is attached to the front-end | tip part of 24 (specifically metal mesh tube 31). The first and second transmission members 26 and 28 are detachably connected to the measurement device main body 25 and are interposed between the measurement device main body 25 and the detection unit main body 22 of the tip unit 10.

  A concave portion 33 is provided in an intermediate portion in the axial direction (vertical direction in FIG. 2) of the detection unit main body 22, an irradiation unit 32 is provided on one end side (upper side in FIG. 2) of the concave portion 33, and the other end side of the concave portion 33. A light receiving unit 34 is provided (on the lower side in FIG. 2), and the irradiation unit 32 and the light receiving unit 34 are arranged so as to face each other. The irradiation unit 32 is provided with an irradiation port 36, and an irradiation cover 37 is attached so as to seal the irradiation port 36, and the light receiving unit 34 is provided with a light receiving port 38, so that the light receiving port 38 is sealed. A light receiving cover 40 is provided.

  The detection unit body 22 is further provided with a first passage 42 communicating with the irradiation port 36 and a second passage 44 communicating with the light receiving port 38. In this embodiment, the first passage 42 extends linearly toward the irradiation port 36, and the second passage 44 extends linearly substantially parallel to the first passage 42 and then toward the light receiving port 38. In this connection, a reflecting mirror 46 is disposed at the bent portion of the second passage 44.

  Measurement light from the first optical fiber 27 is guided to the irradiation unit 32 of the tip unit 10. The first optical fiber 27 is composed of a fiber 48 that transmits measurement light and a protective coating 50 that covers the fiber 48, and the tip of the fiber 48 that protrudes from the protective coating 50 on the tip side of the detection unit main body 22. The first passage 42 is inserted and positioned. Further, the detection light from the light receiving unit 34 is configured to be guided to the second optical fiber 29. Similarly to the first optical fiber 27, the second optical fiber 29 is composed of a fiber 52 and a protective coating 54 covering the fiber 52. On the distal end side, the distal end portion of the fiber 52 protruding from the protective coating 54 is the detection unit main body. 22 is inserted into the second passage 44 and positioned.

  The measuring device main body 32 has a light emitting means 56 (for example, constituted by a laser light emitting element) that emits light as measurement light and a light receiving means 58 (for example, constituted by a CCD) that receives light as detection light. A concentration calculating means 59 (constituting the signal processing means) for calculating the dust concentration by signal processing the detection light received by the light receiving means 58 as required, and for displaying the dust concentration The density calculating means 59 is composed of, for example, a microprocessor, and the display means 60 is composed of, for example, a liquid crystal display device. In the measuring apparatus 2, one or two or more connection units 12 are detachably connected to the rear end side of the front end unit 10 as necessary, as described later. As shown in FIG. 1, the detection unit 20 of the tip unit 10 is inserted into a predetermined detection region R in the pipe 6. The rear ends of the first and second optical fibers 27 and 29 are arranged to face the light emitting means 56 and the light receiving means 58 of the measuring device main body 56, and use reflected light from the measurement light detection region R. The concentration of dust contained in the fluid flowing through the detection region R is measured.

  With this configuration, the measurement light from the light emitting means 56 of the measuring device main body 32 is transmitted to the detection unit 20 of the tip unit 10 through the first optical fiber 27, and the transmitted measurement light is irradiated to the irradiation cover 37. The detection light emitted from the irradiation unit 32 toward the detection region R is detected by the detection unit R, that is, scattered light due to dust in the detection region R is received by the light reception unit 34 through the light receiving cover 40, and thus received detection light. Is reflected by the reflecting mirror 46, guided to the second optical fiber 29, and transmitted to the light receiving means 58 of the measuring apparatus main body 32 through the second optical fiber 29. When the detection light is received, the light receiving means 58 generates a detection signal corresponding to the received light amount, and based on this detection signal, the concentration calculating means 59 calculates the dust concentration as required, and the calculated dust Is displayed on the display means 60, and the concentration of the dust contained in the fluid is thus measured.

  In this measuring device 2, when the detection unit 20 of the tip unit 10 is inserted into the detection region R in the pipe 6, as described later, at the rear end of the tip unit 10 (or the connection unit 12 connected to the tip unit 10). After connecting the connection unit 12, the connection unit 12 connected using the unit insertion device 62 is inserted. Referring mainly to FIG. 3 and FIG. 4, the illustrated unit insertion device 62 has an attachment main body 64 attached to the open / close ball valve 18. The attachment main body 64 has an elongated rectangular shape, and a circular hole (not shown) is formed at the center thereof. An extension pipe 66 is formed on the lower surface (outer surface) of the attachment main body 64 corresponding to the circular hole. The attachment main body 64 is attached to the ball opening / closing valve 18 via the extension pipe 66. The extension pipe 66 is provided with an opening / closing valve 68 for releasing the fluid to the atmosphere. Further, a block-shaped insertion member 70 is attached to the upper surface (inner surface) of the attachment main body 64 in correspondence with the circular hole. The insertion member 70 will be described later.

  An upper wall member wall 72 is disposed above the attachment main body portion 64 at a predetermined interval, and a pair of guide rods 74 and 76 are provided between the attachment main body portion 64 and the upper wall member 72. . The pair of guide rods 74 and 76 extend from the attachment main body 64 toward the upper wall member 72 substantially in parallel with each other.

  A pressing body 78 is supported by the pair of guide rods 74 and 76 so as to be movable in the direction of approaching and separating from the mounting body 64. In the illustrated embodiment, the pressing body 78 includes a moving member 80 slidably supported by a pair of guide rods 74 and 76, and first and second support blocks fixed to the lower surface (inner surface) of the moving member 80. 82, 84, a lead-out member 86 attached to the lower surface (tip surface) of the second support block 84, and a pressing member 88 attached to the lower surface (tip surface) of the lead-out member 86. A pair of abutment pins 90 are provided at the front end portion.

  The unit insertion device 62 further includes a pair of hoists 92 and 94 for moving the pressing body 78 toward the attachment main body 64. The hoists 92 and 94 are known per se. In this embodiment, the hoists 92 and 94 are interposed between the attachment main body 64 and the pressing body 78. Here, the hoists 92 and 94 will be briefly described with reference to FIGS. 9 to 11. The hoists 92 and 94 each include a hoist body 96, and the hoist body 96 of one hoist 92 is attached to one end of the mounting body 64. The hoist body 96 of the other hoist 94 is attached to the bracket 100 attached to the other end of the attachment main body 64. The hoists 92 and 94 include a load sheave (not shown) rotatably supported by the hoist body 96, and a chain 102 is provided so as to be wound around the load sheave, and a first hook 104 is attached to one end of the chain 102. The hoist body 94 is provided with a second hook 106. In addition, an operating lever 107 is rotatably mounted on the hoist body 96. By operating the operating lever 107, the load sheave can be rotated in a predetermined direction to move the chain 102.

  In this embodiment, upper ends 108 and 110 extending upward are provided at both ends of the moving member 80, and outer protrusions 112 and 114 protruding outward are provided on these upper extensions 108 and 110. Upper locking ring members 116 and 118 are attached to the protrusions 112 and 114. In addition, lower locking ring members 120 and 122 are attached to both ends of the mounting main body 64 so as to correspond to the upper locking ring members 116 and 118. One hoist 92 is disposed on one side (left side in FIGS. 4 and 5) of the unit insertion device 62, and the first hook 104 is locked to the upper locking ring member 116, and the second hook 106 is locked to the lower side. Locked to the ring member 120. The other hoist 94 is disposed on the other side (right side in FIGS. 4 and 5) of the unit insertion device 62, and the first hook 104 is locked to the upper locking ring member 118, and the second hook 106 is Locked to the locking ring member 122.

  A ratchet mechanism (not shown) is provided in association with a load sheave (not shown) of the hoists 92 and 94. The ratchet mechanism includes a ratchet wheel (not shown) that rotates integrally with the load sheave, and a ratchet pawl 124 that releasably engages the ratchet wheel. The substantially L-shaped ratchet pawl 124 supports the support pin 125. The hoist body 96 is swingably mounted. The ratchet pawl 124 is biased by a bias spring (not shown) so that the pawl portion 126 engages with the tooth portion of the ratchet wheel. The ratchet pawl 124 allows the ratchet wheel to rotate in a predetermined direction, but engages with a tooth portion of the ratchet wheel in a direction opposite to the predetermined direction. Accordingly, the ratchet mechanism allows the pressing body 78 to move toward the attachment main body 64, but prevents the movement toward the opposite side of the attachment main body 64.

  In relation to the ratchet pawl 124 of the ratchet mechanism, an engagement release member 128 for releasing the engagement state of the ratchet pawl 124 is provided. The disengagement member 128 is attached to an attachment member 130 attached to the hoist body 96, an operation portion 132 is provided at one end portion thereof, and a tapered action portion 134 is provided at a tip portion protruding from the attachment member 130. Yes. The disengagement member 128 is mounted so as to be movable between a retracted position indicated by a solid line in FIGS. 9 and 10 and a release position indicated by a one-dot chain line in FIG. When in the retracted position, as shown by a solid line in FIGS. 9 and 10, the action portion 134 of the disengagement member 128 is retracted from the ratchet pawl 124, and the ratchet pawl 124 has its pawl portion 126 on the tooth portion of the ratchet wheel. When engaged, but at the release position in which the operation portion 132 is pressed in the direction indicated by the arrow 136, the action portion 134 of the engagement release member 128 acts on the ratchet pawl 124 and rotates counterclockwise in FIG. The ratchet pawl 124 and the ratchet wheel are disengaged.

  In relation to the disengaging member 128, a movement preventing member 140 (not shown in FIGS. 9 and 10) for preventing movement from the retracted position to the releasing position is provided. . The movement preventing member 140 is formed of a hook-like member that engages with the disengaging member 128, and an upper end portion of the movement preventing member 140 is pivotally attached to the attachment member 130 via a pin 142. When in the blocking position indicated by the solid line in FIG. 11, the movement blocking member 140 is interposed between the mounting member 130 and the operation portion 132 of the disengaging member 128 and engages with the disengaging member 128. It is possible to reliably prevent the release member 128 from moving to the release position, thereby preventing erroneous operation of the engagement release member 128. Further, when turning from the blocking position to the position indicated by the alternate long and short dash line in the clockwise direction in FIG. 11, the movement blocking member 140 is detached from between the mounting member 130 and the operating portion 132 of the disengaging member 128. The engagement release member 128 is allowed to move to the release position.

  With this configuration, when the operation lever 107 of the pair of hoists 92, 94 is operated to swing in the vertical direction, the load sheave (not shown) is rotated in a predetermined direction by the ratchet mechanism, whereby the chain 102 is pulled downward to the ratchet main body 96 side, and the pressing body 78 is moved downward from the raised position shown in FIG. 4 along the pair of guide rods 74 and 76, and can be moved to the lowered position shown in FIG. . And if it moves to this lowering position, a pair of contact pin 90 of the press member 88 will contact the upper surface of the insertion member 70, and the movement beyond the said lowering position is blocked | prevented by this. Further, when the disengagement member 128 is positioned from the retracted position to the disengaged position with the movement preventing member 140 as the disengaged position, the engagement between the ratchet pawl 124 and the ratchet wheel (not shown) is disengaged, and a predetermined direction of the load sheave Can be positioned at the raised position by lifting the pressing body 78 upward.

  In this embodiment, a locking means 144 is provided for locking and holding the pressing body 78 in the raised position shown in FIGS. 3 and 4. Referring to FIGS. 6 to 8 together with FIGS. 3 and 4, the locking means 144 includes a locking member 146, and the locking member 146 is attached to the mounting sleeve 148 attached to the moving member 80 of the pressing body 78, and the upper wall member. 72 is supported so as to be movable over a predetermined range in a direction approaching and separating from 72. A small inner diameter portion 150 is provided at the outer end portion of the mounting sleeve 148, and a large diameter action portion 152 is provided at one end portion (tip end portion) of the lock member 146, and the small inner diameter portion 150 and the large diameter action portion 152 are provided. The coil spring 154 is provided so as to cover the shaft portion of the lock member 146. An operation member 156 is attached to the other end of the lock member 146. The coil spring 154 elastically biases the lock member 146 to the left in FIGS. 6 to 8 toward the upper wall member 72, and is in a lock position (position shown in FIG. 6) where the operation member 156 contacts the mounting sleeve 148. Retained. When the operation member 156 is pulled in the direction indicated by the arrow 158 against the action of the coil spring 154 while in this locked position, it moves to the retracted position (position shown in FIG. 7) that retracts from the upper wall member 72. Can be made. When in the locked position, the large-diameter acting portion 152 of the lock member 146 protrudes toward the upper wall member 72, and when the pressing body 78 is in the raised position, it contacts the upper surface of the upper wall member 72. The member 146 is locked and held at the raised position. When in the retracted position, the large-diameter acting portion 152 of the lock member 146 is disengaged from the upper wall member 72, and the movement of the pressing body 78 from the raised position to the lowered position is allowed.

  In this embodiment, a through hole 160 is provided in the operation portion 156 of the lock member 146, and a pin 162 is provided in the small inner diameter portion 150 of the mounting sleeve 146, and the pin 162 is formed in the through hole 160 of the operation portion 156. In this configuration, the lock member 146 is allowed to move in the axial direction relative to the mounting sleeve 148 (left and right in FIGS. 6 to 8), but the relative rotation with respect to the mounting sleeve 148 is allowed. Is blocked. In relation to this, an inclined surface 164 is provided at the upper end of the large-diameter acting portion 152 of the lock member 146, and when the pressing body 78 is moved upward as indicated by the arrow 166 with respect to the upper wall member 72, FIG. As shown, the upper wall member 72 acts on the inclined surface 164 of the large-diameter acting portion 152 so that the lock member 146 moves from the lock position to the retracted position.

  In this embodiment, a mounting screw 168 as a first mounting member is screwed onto the mounting main body 64, and a second mounting member is mounted on the pressing body 78 (in this embodiment, the moving member 80). An attachment screw 170 is attached, and one end side of a chain 172 as a movement restraining member is locked to the attachment screw 170. The other end of the chain 172 is detachably locked with the mounting screw 168 of the mounting body 64 when the pressing body 78 is positioned at the lowered position, and thus the mounting body 64 and the pressing body 78 are connected. By connecting via the chain 172, the upward movement of the pressing body 78 from the lowered position can be reliably prevented.

  Next, the configuration of the connection unit 12 and the connection of the connection unit 12 to the tip unit 10 will be described with reference to FIGS. In FIG. 12, the illustrated connection unit 12 includes a connection protection member 174 for protecting the first and second optical fibers 27 and 29. The connection protection member 174 includes an inner sleeve tube 176 disposed on the radially inner side and an outer sleeve tube 178 covering the inner sleeve tube 176, and the first and second sleeve tubes 176 and 178 are closed at the first ends. A member 180 is provided, and a second closing member 182 is provided at the other end thereof. The first closing member 180 protrudes axially outward (rightward in FIG. 12) from the inner and outer sleeve tubes 176 and 178, and the protruding portion 184 is further provided with a protruding insertion portion 186 extending outward in the axial direction. ing. A male screw portion 188 is provided on the outer peripheral surface of the protruding portion 184, and a pair of connecting pins 190 is provided on the end surface of the protruding portion 184.

  The second closing member 182 protrudes axially outward (leftward in FIG. 12) from the inner and outer sleeve tubes 176 and 178, and the protrusion 192 is provided with an annular recess 194. A mounting recess 196 is provided on the outer side in the axial direction of the recess 194, and a connection notch 198 is provided at the tip of the protrusion 192. Further, the connecting nut member 202 provided with the female screw portion 200 is mounted in the mounting recess 196 so as to be relatively rotatable, and the pin member 204 provided on the outer peripheral surface of the second closing member 182 allows the first connecting nut member 202 to 2 Separation from the closing member 182 is prevented.

  When connecting the connection units 12 to each other, FIG. 13 (in FIG. 13, the upper side from the center line shows a state before the connection unit 12 is connected, and the lower side from the center line is a state after the connection unit 12 is connected. As shown in FIG. 4), the protruding insertion portion 186 of the first closing member 180 of one connection unit 12 is inserted into the second closing member 182 of the other connection unit 12, and the connecting pin 190 of the first closing member 180 is inserted. If it is inserted into the connection notch 198 of the second closing member 182 and the connecting nut member 202 mounted on the second closing member 182 is rotated in this inserted state, it is screwed to the male threaded portion 188 of the first closing member 180. Good. When mounted in this manner, the pair of connection units 12 are coupled via the coupling nut member 202, and the first closing member 180 of one connection unit 12 (rear end side connection unit) and the other connection unit 12 (front end side connection). The second closing member 182 of the unit) is securely sealed by a pair of annular seals 206 mounted on the inner peripheral surface of the second closing member 182.

  The tip unit 10 and the connection unit 12 of the measuring device 2 are detachably coupled in the same manner as described above. 14 (in FIG. 14, the upper side from the center line is shown with the connection unit 12 and the tip unit 10 connected, and the lower side from the center line is shown with the connection unit 12 not connected). 10 is provided with a unit connecting portion 208 for connecting with the connecting unit 12, and this unit connecting portion 208 includes a cylindrical connecting member 210, and the connecting member 210 has an axial direction ((FIG. 14, the first and second optical fibers 27 and 29 extend outward through the through hole 212, and the through hole 212 is filled with the adhesive 214. As a result, the space between the connecting member 210 and the first and second optical fibers 27 and 29 is sealed.

  On the rear end side of the front end unit 10, a nut member 216 is mounted so as to cover the rear end portion of the front end protection member 24 (specifically, the metal mesh tube 31), and the front end protection member 24 (specifically, The sleeve-like member 218 is attached so as to cover the rear end face) of the metal mesh tube 31 and the flexible tube 30), and this sleeve-like member 218 is attached to the connecting member 210.

  On the other end side of the connecting member 210 (the side to which the connection unit 12 is connected), a somewhat larger large inner diameter portion 220 having a large inner diameter of the through hole 212 is provided, and a pair of annular seals 222 are attached to the large inner diameter portion 220. Has been. The other end portion of the connecting member 210 is configured in substantially the same manner as the other end portion of the connection unit 12, and an annular recess 224 is provided on the outer peripheral surface thereof. A mounting recess 226 is provided, and a connection notch 228 is provided at the other end. Further, a connecting nut member 232 provided with a female screw portion 230 is attached to the mounting recess 226 so as to be relatively rotatable, and the pin member 234 provided on the connecting member 210 causes the connecting nut member 232 to be detached from the connecting member 210. Is prevented.

  Since it is comprised in this way, the front-end | tip unit 10 and the connection unit 12 are connected as follows. That is, as shown in FIG. 14, the protruding insertion portion 186 of the first closing member 180 of the connecting unit 12 is inserted into the large inner diameter portion 220 of the connecting member 210 of the tip unit 10, and a pair of connecting portions of the first closing member 180 is connected. The pin 190 is inserted into the pair of connection notches 228 of the connection member 210, and in this inserted state, the connection nut member 232 is rotated and screwed into the male screw portion 188 of the first closing member 180 of the connection unit 12. do it. When connected in this way, the connection protection member 174 of the connection unit 12 and the connection member 210 of the tip unit 10 are detachably connected via the connection nut member 232.

Next, mainly with reference to FIG.1 and FIGS.3-5, the insertion operation to the detection area | region R in the piping 6 of the detection part 20 of the measuring device 2 mentioned above is demonstrated.
When the detection unit 20 of the tip unit 10 is inserted into the pipe 6, the unit insertion device 62 is attached to the valve housing 242 of the open / close ball valve 18 as shown in FIG. A connecting flange 244 is provided at the end of the valve housing 242, and a connecting flange 246 is also provided at the tip of the extension pipe 66 of the unit insertion device 62. These connecting flanges 244 and 246 are connected by bolts and nuts, In this way, the extension pipe 66 is attached to the insertion opening of the diffusion pipe 16 (functioning as an insertion pipe) via the open / close ball valve 18.

  In this unit insertion device 62, the tip unit 10 is inserted and held as shown in FIG. 4 and FIG. 15 (a). That is, the insertion member 70 is provided with a circular insertion hole 248, and the tip unit 10 is inserted into the insertion member 70 and the extension tube 66 through the insertion hole 248. A ring-shaped seal member 250 is disposed on the inner peripheral surface of the insertion hole 248 of the insertion member 70, and the gap between the connecting member 210 of the tip unit 10 and the insertion member 70 is sealed by the seal member 250.

  In addition, the insertion member 70 is formed with a pair of insertion holding holes 252 that extend across a part of the insertion hole 248 so that the annular recess 224 of the connecting member 210 is in the insertion holding state of the tip unit 10 described above. Is positioned so as to match the pair of insertion holding holes 252, and in this state, the holding pins 254 (see also FIG. 15B) are inserted through the insertion holding holes 252 and a part of the annular recess 224. When inserted, a part of the shaft portion 256 of the holding pin 254 is positioned and held in the annular recess 224 of the connecting member 210 as shown in FIG. The disconnection can be prevented with certainty. In this inserted and held state, the rear end portion of the front end unit 10 (specifically, the connecting nut member 232 and its vicinity) slightly protrudes from the insertion member 70, and the front end portion of the connection unit 12 is connected as described above. can do. In this embodiment, the tip unit 10 is inserted and held by the pair of holding pins 254, but may be held using a fixing screw or the like.

  After attaching the unit insertion device 62 in this way, the pressing body 78 is locked and held in the raised position, and a connection unit to be connected between the connecting member 210 of the tip unit 10 held by the insertion member 70 and the pressing body 78. 4, the connecting nut member 232 of the connecting member 210 is rotated to connect the tip of the connecting unit 12 to the connecting member 210 of the tip unit 10 as described above. Alternatively, the connection unit 12 may be connected in advance to the connecting member 210 of the tip unit 10, and the extension pipe 66 of the unit insertion device 62 to which the tip unit 10 and the connection unit 12 are attached may be attached to the open / close ball valve 18.

  After mounting in this way, the open / close ball valve 18 is opened, the pair of holding pins 254 are removed, the holding state of the tip unit 10 is released, and the detection unit 20 of the tip unit 10 is inserted toward the detection region R. To do. At the time of insertion, the locked state by the locking means 144 is released, and in this state, the operation levers 107 of the pair of hoists 92 and 94 are operated. As a result, the load sheaves (not shown) of the pair of hoists 92 and 94 are rotated in a predetermined direction, the chain 102 is pulled downward toward the ratchet body 96, and the pressing body 78 is moved to the pair of guide rods 74 and 76. Is moved downward along. Then, the pressing member 88 of the pressing body 78 acts on the rear end portion of the connection unit 12 and presses downward. The movement of the pressing body 78 moves the connection unit 12 downward and is inserted through the insertion member 70. The detection unit 20 of the tip unit 10 is inserted toward the detection region R through the connection unit 12.

  When the pressing body 78 is lowered to the lowered position by the pair of hoists 92, 94, as shown in FIG. 5, the pair of abutting pins 90 of the pressing member 88 abut against the insertion member 70, and this lowered position. Insertion beyond is prevented. When inserted, the holding pin 254 is inserted through the insertion holding hole 252 of the insertion member 70, and the connection unit 12 is inserted and held by the holding pin 254. For example, when measuring the concentration of dust in the detection region R in this state, the other end side of the chain 172 is detachably locked to the mounting screw 168 of the mounting body 64, and the pressing is performed by locking in this way. The body 78 is prevented from moving upward from the lowered position, and sufficient safety during measurement can be ensured.

  When another connection unit 12 is connected to the connection unit 12 thus inserted, the movement prevention members 140 of the hoists 92 and 94 are rotated clockwise in FIG. The mating release member 128 is pressed and positioned from the retracted position to the release position, and the engagement state between the ratchet pawl 124 and the ratchet wheel (not shown) is released. Then, the pressing body 78 is lifted up to the raised position. As a result, the locking means 144 is locked, and the pressing body 78 is locked and held at the raised position by the locking means 144.

  After being held in the raised position in this way, in the same manner as described above, the next connection unit 12 is connected to the rear end portion of the inserted connection unit 12 and inserted. That is, the next connection unit 12 is positioned between the rear end portion of the connection unit 12 inserted and held in the insertion member 70 and the pressing body 78, and the connecting nut member 202 of the connection unit 12 is rotated in the same manner as described above. The tip of the next connection unit 12 is connected to the rear end of the connection unit 12 in the same manner as described above. Then, the pair of holding pins 254 are removed, and the locked state by the locking means 144 is released. In this state, the operation lever 107 of the pair of hoists 92 and 94 is operated to insert the next connection unit 12. By connecting and inserting the plurality of connection units 12 in this way, the detection unit 20 of the tip unit 10 can be inserted up to the detection region R.

  Such a measuring device can be configured as shown in FIGS. FIG. 16 is a perspective view showing a unit insertion device in the measurement apparatus according to the first modification, and FIG. 17 is a partial sectional view showing a part of the unit insertion device in FIG. In the following embodiments, the same members as those in the embodiments shown in FIGS. 1 to 15 are denoted by the same reference numerals, and the description thereof is omitted.

  In FIG. 16 and FIG. 17, in this modification, the attachment main body portion 64 </ b> A is composed of a base member 302 and a turning support member 304, and the turning support member 304 is in the direction indicated by arrows 306 and 308 with respect to the base member 302. It is supported so as to be relatively rotatable. In relation to this, the swivel support member 304 is formed with arc-shaped openings 310 and 312 corresponding to the pair of guide rods 74 and 76, and U-shaped corresponding to the cylindrical insertion member 70A. A shaped opening 314 is formed.

  Further, the upper ends of the pair of guide rods 74 and 76 are fixed to the upper wall member 72A, and the lower ends thereof are fixed to the base member 302 through the arc-shaped openings 310 and 312 of the turning support member 304. Further, the lower end portion of the insertion member 70 </ b> A is fixed to the base member 302 through the opening 314 of the turning support member 304. In this connection, the extension tube 66 is further fixed to the base member 302, and the base member 302 of the attachment main body 64A is attached to the open / close ball valve 18 (see FIG. 1) via the extension tube 66. The hoists 92 and 94 are attached to the turning support member 304 via the brackets 98 and 100, and the lower locking ring member 120 to which the second hook 106 of the hoists 92 and 94 is locked is also attached to the turning support member 304. ing.

  Further, the pressing body 78A includes a moving member 80 that is slidably supported by the pair of guide rods 74 and 76, and a joint means 320 attached to the moving member 80. The lead-out member 86 is attached to the joint means 320. A pressing member 88 is attached through the gap. The joint means 320 includes a first member 324 having a spherical portion 322 and a second member 328 having a hemispherical receiving portion 326, and the spherical portion 322 is received in the hemispherical receiving portion 326 so as to be rotatable in any direction. It has been. The other structure of this modification is substantially the same as the embodiment shown in FIGS.

  In this modification, the swivel support member 304 can swivel over a predetermined range with respect to the base member 302, so that the angular position of the swivel support member 304 is set to the base member 302 in a state where the extension pipe 66 is attached to the open / close ball valve 18. By adjusting the angle in this way, even when other members are present in the surroundings, it is possible to perform measurement while avoiding these members. When the turning support member 304 is turned with respect to the base member 302, the pressing body 78A (the moving member 80 and the first member 324 of the joint unit 320) also turns through the pair of hoists 92, 94. In order to allow such a turning movement of the pressing body 78A, both end portions of the upper wall member 72A are formed in an arc shape.

Such a measuring apparatus can be configured as shown in FIG. FIG. 18 is a perspective view showing a unit insertion device in the measurement device according to the first modification.
In FIG. 18, in this modification, the pressing body 78B includes a plate-shaped moving member 80B, a lead member 86 attached to the moving member 80B, and a press member 88 attached to the lead member 86. Has been. Further, the insertion member 70 is attached to the attachment main body 64, and the connection unit to be inserted between the rear end portion of the front end unit 10 (or the connection unit 12) held by the insertion member 70 and the pressing member 88. 12 is mounted. In this embodiment, the pressing body 78B is configured to be pulled by the chain 102 of the pair of hoists 92 and 94 and moved downward toward the attachment main body 64 without being guided and supported. The upper wall member 72, the pair of guide rods 74 and 76, and the members related to them are omitted in the embodiment shown in FIG.

  As mentioned above, although various embodiment of the measuring device according to this invention was described, this invention is not limited to these embodiment, A various deformation | transformation thru | or correction | amendment are possible without deviating from the scope of the present invention.

  For example, in the embodiment described above, a pair of hoists are provided between the attachment main body portion and the pressing body. However, when the pressing body can be moved as required, a single hoist is provided. Also good.

Sectional drawing which shows the state which inserted the detection part of the measuring apparatus through the insertion pipe in the detection area of piping. FIG. 2 is a partial cross-sectional view illustrating a detection unit of the measurement apparatus in FIG. 1 and a configuration related thereto. The perspective view which shows the unit insertion apparatus for inserting a connection unit. The front view which shows the unit insertion apparatus of FIG. 3 in the state in which a moving member is located in a raise position. The front view which shows the insertion apparatus of FIG. 3 in the state in which a moving member is located in a lowered position. The fragmentary sectional view which shows the locking means of the unit insertion apparatus of FIG. 3, and the structure relevant to it. The fragmentary sectional view which shows a state when the locking means of FIG. 6 is made into the lock release state. The fragmentary sectional view which shows a state when a moving member raises to raise position vicinity. The perspective view which shows the hoist in the unit insertion apparatus of FIG. The front part which shows a part of hoist of FIG. The right view which shows the hoist of FIG. Sectional drawing which shows the connection unit in a measuring apparatus. Sectional drawing for demonstrating connection operation when connecting a pair of connection unit. Sectional drawing for demonstrating operation of a connection with a front-end | tip unit and a connection unit. FIG. 15A is a partial cross-sectional view showing a state in which the rear end portion of the front end unit is held by the insertion member of the unit insertion device of FIG. 3, and FIG. 15B is a view of the unit insertion device of FIG. The perspective view which shows a pin. The perspective view which shows the unit insertion apparatus in the measuring device of a 1st modification. The fragmentary sectional view which shows a part of unit insertion apparatus of FIG. The perspective view which shows the unit insertion apparatus in the measuring device of a 2nd modification.

Explanation of symbols

2 Measuring device 4 Fluid piping structure 8 Fluid flow path 10 Tip unit 12 Connection unit 16 Radiation tube (insertion tube)
62 unit insertion device 64, 64A mounting main body 70 insertion member 78, 78A, 78B pressing body 80, 80B moving member 88 pressing member 92, 94 hoist 102 chain 128 disengagement member 140 movement restraining member 144 locking means 254 holding pin 320 Joint means R Detection area

Claims (7)

A measuring device for measuring a detection target by guiding a detection unit for measuring the detection target through the insertion tube to the detection region,
A tip unit having the detection unit, a connection unit detachably connected to the tip unit, signal processing means for processing a detection signal from the detection unit as required, the detection unit and the signal A transmission member for connecting the processing means,
The tip unit and the connection unit are configured to be inserted by a unit insertion device so that the detection unit is located in the detection region,
The unit insertion device includes an attachment main body attached to the insertion tube, a pressing body movable in a direction approaching and separating from the attachment main body, and a space between the attachment main body and the pressing body. An interposed hoist,
When the detection unit is inserted into the detection region, the distal end portion of the connection unit is detachably connected to the rear end portion of the distal end unit. When the hoist is inserted in this state, the pressing body is attached to the mounting body. A measuring apparatus, wherein the connecting unit is inserted by moving in a direction approaching the unit.   The unit insertion device includes an upper wall member disposed at a predetermined direction with respect to the attachment main body, and a pair of guide rods provided between the upper wall member and the attachment main body. The pressing body is movably supported by the pair of guide rods, and when the hoist is inserted, the pressing body moves along the pair of guide rods in a direction approaching the attachment main body portion. The measuring apparatus according to claim 1, wherein the connection unit is inserted.   The attachment main body includes a base member attached to the insertion tube, and a turning support member that is rotatably attached to the base member over a predetermined range, and the pressing body includes the pair of members. A pair of guide rods, comprising: a moving member movably supported by the guide rod; a pressing member for pressing the connection unit; and a joint means interposed between the moving member and the pressing member. The measuring apparatus according to claim 2, wherein the measuring device is provided between the base member and the upper wall member, and the hoist is interposed between the turning support member and the moving member.   The pressing body is provided with locking means for acting on the upper wall member to lock and hold the pressing body in the raised position, and the locking means includes a locking position acting on the upper wall member and the upper wall. The measuring apparatus according to claim 2, further comprising a lock member that is mounted on the pressing body so as to be movable between a retreat position and a retreat position that retreats from the member.   A first mounting member is mounted on the mounting main body, a second mounting member is mounted on the pressing body, and the pressing body is lowered between the first mounting member and the second mounting member. The measuring apparatus according to claim 2, wherein a movement restraining member for holding is attached detachably.   The attachment main body is provided with an insertion member having an insertion hole for inserting the connection unit, the insertion member is provided with an insertion holding hole, and the insertion holding hole passes through a part of the insertion hole. An insertion recess is provided at the rear end of the tip unit and the connection unit, and is held through the insertion holding hole when the rear end of the tip unit is located in the insertion member. When the pin is inserted, the holding pin extends through the insertion recess of the tip unit, and the holding pin is inserted through the insertion holding hole in a state where the rear end portion of the connection unit is located in the insertion member. The measuring device according to claim 1, wherein the holding pin extends through the insertion recess of the tip unit.   A pair of hoists are provided between the attachment main body and the pressing body, and each of the pair of hoists includes an operation lever, a load sheave that is rotated by operation of the operation lever, and the load A ratchet mechanism provided in association with the sheave, the ratchet mechanism including a ratchet wheel that rotates integrally with the load sheave, a ratchet pawl that is releasably engaged with the ratchet wheel, and a ratchet pawl. An engagement release member that is movable between a release position that acts to release the engagement with the ratchet wheel and a retracted position that retreats from the ratchet pawl; and the engagement release member to the release position The measuring apparatus according to claim 1, further comprising a movement blocking member for blocking the movement of the moving body.

Images