JP6599838B2 - Wear type manual on-off valve - Google Patents

Description

  The present invention relates to a body in which a weir is formed between a first flow path and a second flow path, a valve seat formed in the weir, a valve body that contacts or separates from the valve seat, and a valve when the valve is closed A pressure spring that presses the body against the valve seat, a housing that contains the pressure spring, a handle that fits into the housing, and a valve body that is inserted through the housing and the handle and held axially movable. The present invention relates to a wear-type manual open / close valve including a rod.

  Conventionally, as a manual on-off valve that adjusts the flow rate of liquid, gas, etc., especially a manual on-off valve that can easily stop the flow while adjusting the flow rate of water, cleaning liquid, steam, etc. used in the pharmaceutical production line Is used. As such a manual on-off valve, the manual on-off valve 101 of the first conventional example (see Patent Document 1) and the second one which compresses the pressing spring by the handle moving the spring pressing member and presses and seals the valve body. A conventional manual on-off valve 201 (see Patent Document 2) is known.

7 and 8 are cross-sectional views of the first conventional open / close valve 101. FIG. 7 shows the valve closed state, and FIG. 8 shows the valve open state.
As shown in FIG. 7, the manual on-off valve 101 is disposed on the main body 102 including the valve seat 102 c in a state where the housing 105 surrounds the upper rod 104 </ b> A and the lower rod 104 </ b> B of the rod 104, the pressing spring 106, and the pressing member 107. It is fixed. When the valve is closed, the pressing spring 106 is compressed between the pressing member 107 disposed at the upper end portion of the housing 105 and the bulging portion 104Aa provided on the upper rod 104A, and the reaction force is compressed. Then, the rod 104 and the valve body 103 are urged toward the valve seat 102c. Therefore, a pressing force that presses the valve body 103 against the valve seat 102 c is obtained by the pressing spring 106.

  From this state, when the handle 108 that is screwed into the housing 105 via the screw portion 111 is rotated, the handle 108 is raised and engaged with the distal end locking portion 104Ab of the rod 104 as shown in FIG. When the handle 108 is further rotated thereafter, the rod 104 is pulled up to the handle 108 via the tip locking portion 104Ab, and the valve body 103 is separated from the valve seat 102c.

9 and 10 are cross-sectional views of the second conventional manual on-off valve 201. FIG. 9 shows the valve open state, and FIG. 10 shows the valve closed state.
As shown in FIG. 9, the manual on-off valve 201 has a valve body 204 accommodated in a valve box 202 having a valve seat 202c. A valve rod 205 is provided integrally with the valve body 204. The valve stem 205 is inserted into the lid body 208 of the cylinder body 206 and is prevented from coming off by a flange 205a. The cylinder body 206 is provided with a valve pressing body 209 that is screwed into the valve box 202. By rotating the valve pressing body 209, the cylinder body 206 moves while rotating in the axial direction. The pressing spring 207 is contracted between the flange 205a of the valve rod 205 and the inner wall 207a of the cylinder body 206. When the valve is closed, the reaction force of the pressing spring 207 causes the valve body 204 to move toward the valve seat 202c via the valve rod 205. Energize. That is, a pressing force that presses the valve body 204 against the valve seat 202 c is obtained by the pressing spring 207.

  When the valve pressing body 209 is rotated from the valve closed state, the cylinder body 206 moves to the opposite side of the valve seat 202c while rotating integrally with the valve pressing body 209 as shown in FIG. When the flange 205a of the valve rod 205 is engaged with the lid body 208, the valve body 204 moves integrally with the cylinder body 206 and is separated from the valve seat 202c. At this time, since the pressing spring 207 is accommodated in the cylinder body 206 and the lid body 208, the spring force of the pressing spring 207 does not become a load when the valve pressing body 209 is rotated.

Japanese Patent Laid-Open No. 10-122380 No. 04-40058 JP-A-8-200509

  However, the manual open / close valve 101 of the first conventional example shown in FIGS. 7 and 8 has the presser member 107 that contacts the housing 105 when the valve body 103 is moved between the valve closed position and the valve open position. The pressing spring 106 is compressed between the pressing member 107 and the bulging portion 104Aa. The reaction force acts on the rod 104, the tip locking portion 104Ab, and the handle 108 via the bulging portion 104Aa. For this reason, when the handle 108 is rotated, the reaction force of the pressing spring 106 becomes a load, and it is difficult to turn the handle 108 and the operability is poor.

  Further, the manual open / close valve 201 of the second conventional example shown in FIGS. 9 and 10 does not cause a load when the spring force of the pressing spring 207 rotates the valve pressing body 209, but the valve pressing body 209 and the valve rod 205 are Due to the separation, the valve body 204 is pressed in a state of being inclined with respect to the valve seat 202c when the valve is closed, and the seal may be unstable.

  In particular, when a manual open / close valve is arranged in a pipe through which a raw material flows, such as a pharmaceutical production line, the pharmaceutical production line is periodically sterilized from the viewpoint of hygiene. If the entire line is stopped and the sterilization operation is performed, the production efficiency decreases. For this reason, the sterilization operation is performed every certain interval. A manual on-off valve is used to divide the section. The manual on-off valve is normally opened to flow the raw material through the line. When sterilization is performed, the operator closes the manual open / close valve appropriately to divide a section to be sterilized, and performs sterilization by flowing steam, a cleaning solution, or the like through the section. When sterilization is completed, the closed manual open / close valve is returned to the valve open state. The operator performs sterilization of another area in the same manner. Therefore, there is a need for a manual on-off valve that has good operability and can perform more stable sealing.

  In the medical industry, a diaphragm valve having a weir (wear) is used in order to drain the liquid in the pipe. In this valve, the product is inclined and piped so that the flow paths on the primary side and the secondary side are connected at the same height, and the liquid flows down without stagnation. However, since the diaphragm valve body is pressed against the curved surface for sealing, a large force is required for sealing, and the drive unit becomes large.

Therefore, the present inventor invented the wear-type manual opening / closing valve 301 of Japanese Patent Application No. 2015-0775415 as shown in FIGS. 11 and 12 are sectional views of the wear-type manual on-off valve 301. FIG. 11 shows the valve open state, and FIG. 12 shows the valve closed state.
However, in such a wear-type manual on-off valve 301, the male screw portion 302a is provided on the outer periphery of the housing 302, and the female screw portion 303a is provided on the inner periphery of the handle 303, so that the size of a built-in object such as the pressing spring 304 is reduced. In addition, the outer diameter of the housing 302 is increased. Along with this, the screw diameter of the male screw portion 302a also increases, so that the contact area between the female screw portion 303a and the male screw portion 302a increases, so that the frictional resistance generated when the handle 303 is rotated increases. There is a problem that 303 is difficult to turn and operability is poor.

  The present invention is intended to solve the above-described problems, and an object thereof is to provide a manual on-off valve having good operability.

In order to solve the above problems, the wear-type manual on-off valve of the present invention has the following configuration.
(1) A body in which a weir is formed between the first flow path and the second flow path, a valve seat formed in the weir, a valve body that contacts or separates from the valve seat, and a valve body when the valve is closed A pressure spring that presses against the valve seat, a housing that contains the pressure spring, a handle that fits into the housing, and a valve body, and is inserted through the housing and the handle and held axially movable. In the wear-type manual on-off valve including the rod, the rod includes a first rod and a second rod arranged in the axial direction, and an external thread is formed on the outer peripheral surface of the first rod, and the inner peripheral surface of the housing Is formed with a female screw portion that is screwed with the male screw portion, and the second rod slides on the inner peripheral surface of the bearing disposed between the guide member and the housing via the piston- shaped guide member. It is moving, rotating together the said pressing spring and a handle to the rotating together It has a stage, the guide member is a hollow cylindrical shape, one end is open and the other end has a bottom portion extending inwardly, the bottom in the center, the hole in which the second rod is inserted formed It is characterized in that a part of the pressing spring is in contact with the bottom surface located on the handle side .

(2) In the wear-type manual opening / closing valve described in (1), a pin is inserted into the second rod side of the first rod, and the second rod is engaged with the pin when the valve is opened. A joint portion is formed.
(3) The wear-type manual on-off valve according to (1) or (2) is characterized in that a vent hole is formed on the upper surface of the housing.
(4) The wear-type manual opening / closing valve according to any one of (1) to (3) , wherein a packing is mounted on an outer peripheral surface of the housing.

The wear-type manual opening / closing valve of the present invention having the above-described features has the following operational effects.
With the configuration of (1) above, the external thread portion is formed on the outer peripheral surface of the first rod, and the internal thread portion is formed on the inner peripheral surface of the housing. Therefore, the internal thread portion is provided on the inner peripheral surface of the housing. Thus, the screw diameter of the male screw portion can also be reduced. As a result, the contact area between the female screw portion and the male screw portion is reduced, and the frictional resistance generated when the handle is rotated is reduced. Therefore, it is easy to turn the handle and operability is good.

  With the configuration of (2) above, when the engaging portion and the pin are engaged, the handle, the first rod, and the pressing spring move integrally in the axial direction with the entire length of the pressing spring being constant. When rotating, the load due to the spring force of the pressing spring is not applied. Therefore, only when the handle starts to turn from the valve closed state or when the valve body is pressed against the valve seat by turning the handle, the handle is loaded with the pressure spring. In other cases, the handle is loaded with the pressure spring. Because it does not start, operability is good.

  With the configuration (3), even if the pressing spring or the piston is inclined, the presence of the bearing does not impair the slidability of the piston, so that the stability of the sealing force can be maintained.

With the configuration (4), when the handle is rotated, the pressing spring rotates integrally with the handle via the first rod, the second rod, and the piston. Since the pressing spring is disposed in a state of being stretched between the handle and the piston provided on the second rod, the pressing spring rotates integrally with the handle and the second rod. Therefore, the load when the handle is rotated is reduced.
On the other hand, the 1st rod is connected with the 2nd rod, and is arranged so that reciprocating linear motion is possible in the direction of an axis. The second rod is coupled with the first rod so as to allow rotation about the axis. The compressor regulates relative rotation with the housing by a keyway. Therefore, the second rod prevents the valve body from being worn because the compressor does not rotate even if the first rod rotates integrally with the handle. A sliding ring is arranged on the tip surface of the second rod and the sliding surface of the compressor to reduce the sliding resistance of the second rod. Therefore, the load when rotating the handle can be reduced, the operability can be improved, the wear of the valve body can be suppressed, and a stable seal can be maintained.

  With the configuration of (5) above, since the housing has a vent hole, when the handle is rotated, the volume between the handle and the upper surface of the housing changes, resulting in a difference from the surrounding atmospheric pressure. The larger the is, the greater the load on turning the handle, but this difference can be eliminated to reduce the force to turn the handle. Therefore, the load when rotating the handle can be reduced and the operability can be improved.

  With the configuration of (6) above, since the packing is disposed between the housing and the handle, it does not enter the interior or the grease does not leak outside when washed with hydrogen peroxide solution or the like.

It is sectional drawing of the wear type | mold manual on-off valve which concerns on this embodiment, Comprising: The valve closed state which has a handle | steering-wheel in a 1st position is shown. It is AA sectional drawing of FIG. It is sectional drawing of a wear type manual on-off valve, Comprising: The engagement state which has a handle in a 2nd position is shown. It is BB sectional drawing of FIG. It is sectional drawing of a wear-type manual on-off valve, Comprising: The valve open state which has a handle | steering-wheel in a 3rd position is shown. It is CC sectional drawing of FIG. It is sectional drawing of the manual on-off valve of a 1st prior art example, Comprising: A valve closed state is shown. It is sectional drawing of the manual on-off valve of a 1st prior art example, Comprising: A valve open state is shown. It is sectional drawing of the manual on-off valve of a 2nd prior art example, Comprising: A valve open state is shown. It is sectional drawing of the manual on-off valve of a 2nd prior art example, Comprising: A valve closed state is shown. It is sectional drawing of the wear type manual on-off valve of Japanese Patent Application No. 2015-075415, Comprising: A valve closed state is shown. It is sectional drawing of the wear type manual on-off valve of Japanese Patent Application No. 2015-075415, Comprising: A valve open state is shown.

The wear type manual on-off valve of the present invention will be described in detail below with reference to the drawings.
(Configuration of wear type manual on-off valve)
The structure of the wear-type manual on-off valve 1 will be described with reference to FIGS. FIG. 1 is a cross-sectional view of a wear-type manual on-off valve 1 and shows a valve closed state in which a handle is in a first position. FIG. 2 shows an AA cross-sectional view of FIG. FIG. 3 is a cross-sectional view of the wear-type manual on-off valve 1 and shows an engaged state in which the handle 2 is in the second position. 4 shows a BB cross-sectional view of FIG. FIG. 5 is a cross-sectional view of the wear-type manual on-off valve 1 and shows a valve open state in which the handle 2 is in the third position. FIG. 6 shows a CC cross-sectional view of FIG.

As shown in FIG. 1, the wear-type manual on-off valve 1 has a housing 3 attached to a body 4 via a rubber diaphragm valve body 5 (an example of a valve body), and a handle 2 is fitted to the housing 3. ing.
The housing 3 has a cylindrical shape. The upper portion of the housing 3 includes an insertion portion 31 that is fitted to the cup-shaped handle 2. A packing 12 is mounted on the outer surface of the insertion portion 31 so as not to enter the interior when washed with hydrogen peroxide or the like, or to prevent grease from leaking outside. A breathing hole 31 b is formed immediately below the packing 12. The insertion portion 31 has a diameter smaller than that of the lower portion of the housing 3, and a step portion 3 a is formed on the outer periphery of the housing 3. On the upper surface of the insertion portion 31 of the housing 3, the first rod 6 is inserted, and a female screw portion 31 a that engages with the male screw portion 6 a of the first rod 6 is formed. A vent hole 31 c is formed on the upper surface of the insertion portion 31.

  The upper end of the first rod 6 is fixed to the upper surface of the handle 2 by a fixing member 14. The first rod 6 is connected to the diaphragm valve body 5 via the second rod 8 and the compressor 11, and is held so as to be movable in the axial direction. A male screw portion 6 a that is screwed with the female screw portion 31 a of the housing 3 is formed on the upper outer peripheral surface of the first rod 6. The lower portion of the first rod 6 has a larger diameter than the upper portion, and a step 6b is formed. A lower portion of the first rod 6 is divided into two forks, and a penetration portion 61 is formed through which the pin 7 penetrates so as to be orthogonal to the axial direction. The lower end of the first rod 6 is in contact with the upper end of the pressing spring 9. The pressing spring 9 constantly urges the diaphragm valve body 5 toward the valve seat 43a.

An engaging portion 81 of the second rod 8 is disposed between the through portion 61 divided into the forked portion of the first rod 6. The engaging portion 81 of the second rod 8 is formed with an elongated hole-shaped engaging hole 81a through which the pin 7 is inserted, as shown in FIG. A piston 10 is disposed around the center of the second rod 8. The lower end of the pressing spring 9 is in contact with the upper surface of the piston 10. A bearing 13 is disposed between the piston 10 and the housing 3. The piston 10 is slidably held by the bearing 13. A compressor 11 is disposed below the second rod 8. A keyway 3 b is formed between the compressor 11 and the housing 3. The compressor 11 restricts relative rotation with the housing 3 by the keyway 3b. The compressor 11 is engaged with the diaphragm valve body 5. The peripheral edge of the diaphragm valve body 5 is sandwiched between the housing 3 and the body 4. A sliding ring 15 is disposed on the end surface of the second rod 8 on the valve seat 43a side. The sliding resistance when the second rod 8 rotates relative to the compressor 11 is reduced by the sliding ring 15.
The piston 10 corresponds to a “piston-shaped guide member” described in the claims.

  In the body 4, a first flow path 4a and a second flow path 4b are formed on the same axis. Flange 41 and 42 for connecting with other piping are provided along the outer periphery of the both ends which the 1st flow path 4a and the 2nd flow path 4b open. A dam 43 is formed between the first flow path 4a and the second flow path 4b. The weir 43 is provided in a straight line so as to be orthogonal to the axis of the body 4. The weir 43 is provided with a valve seat 43a with which the diaphragm valve body 5 abuts or separates. The valve seat 43a is formed so as to be curved in an arc shape toward the opposite side to the housing 3 to ensure a flow path.

(Operation of wear type manual on-off valve)
Next, the operation when the wear-type manual on-off valve 1 of the present embodiment is opened will be described.
When the valve is opened from the valve closed state, the handle 2 at the first position shown in FIG. 1 is rotated to feed the male screw portion 6 a of the first rod 6 and the female screw portion 31 a of the housing 3. The handle 2 moves along the housing 3 in the direction opposite to the valve seat 43a (counter valve seat direction, upward in the figure), and lifts the handle 2 to the second position shown in FIG. When the handle 2 is lifted to the second position, the engagement hole 81a of the second rod 8 and the pin 7 of the first rod 6 are engaged. The pressing spring 9 extends according to the movement of the handle 2 while urging the diaphragm valve body 5 in the direction of the valve seat 43a via the piston 10 and the second rod 8, and becomes a certain length (full length L2).

  Further, the handle 2 is rotated to perform screw feeding, and the handle 2 is lifted in the counter valve seat direction (upward) to the third position shown in FIG. Then, since the pin 7 is engaged with the engagement hole 81 a, the second rod 8 is pulled up to the handle 2 via the first rod 6. The housing 6 moves in the direction opposite to the valve seat integrally with the handle 2, and the step 6 b of the first rod 6 contacts the housing 3. Thereby, the positions of the first rod 6 and the second rod 8 are mechanically determined. Since the piston 10 is slidably held in the bearing 13 in the axial direction, the second rod 8 moves stably in the axial direction when the valve is opened. By providing the bearing 13 on the outer periphery of the piston 10, the bearing portion of the second rod 8 becomes unnecessary, so that the overall height can be suppressed. Thus, the central portion of the diaphragm valve body 5 is separated from the valve seat 43a.

Next, the operation when the wear-type manual on-off valve 1 of the present embodiment is closed will be described.
When the valve is closed from the valve open state, the handle 2 at the third position shown in FIG. 5 is rotated in the reverse direction when the valve is opened, and the upper part of the male screw part 6a of the first rod 6 is connected to the female screw part 31a of the housing 3. The handle 2 is moved to the first position shown in FIG. At this time, the inner surface of the handle 2 comes into contact with the upper end surface of the housing 3. Thereby, the positions of the first rod 6 and the second rod 8 are mechanically determined. At this time, the pressing spring 9 is compressed to the full length L1 between the first rod 6 and the piston 10 (L1 <L2). The spring force of the pressing spring 9 biases the diaphragm valve body 5 in the direction of the valve seat 43a via the piston 10 and the second rod 8, and presses the diaphragm valve body 5 against the valve seat 43a.
As shown in FIG. 1, the engagement hole 81 a of the second rod 8 is not engaged with the pin 7 of the first rod 6 when the valve is closed. Therefore, the diaphragm valve body 5 is not pressed excessively against the valve seat 43a and is sealed uniformly. At this time, since the piston 10 is slidably held in the bearing 13 in the axial direction, the second rod 8 moves stably in the axial direction during the valve opening / closing operation. Therefore, when the valve is closed, the diaphragm valve body 5 can be uniformly sealed to the valve seat 43a, and stable sealing can be performed.

Next, regarding the operation and effect of the wear-type manual on-off valve 1 of the present embodiment, the manual on-off valve 101 of the first conventional example shown in FIGS. 11 and 12 will be described in comparison with the wear-type manual on-off valve 301 invented by the present applicant.
In the manual open / close valve 101 of the first conventional example shown in FIGS. 7 and 8, when the valve body 103 is moved between the valve closed position and the valve open position, the pressing member 107 contacts the housing 105, so that the pressing spring 106 is compressed between the pressing member 107 and the bulging portion 104Aa. The reaction force acts on the rod 104, the tip locking portion 104Ab, and the handle 108 via the bulging portion 104Aa. For this reason, when the handle 108 is rotated, the reaction force of the pressing spring 106 becomes a load, and it is difficult to turn the handle 108.
Further, the manual open / close valve 201 of the second conventional example shown in FIGS. 9 and 10 does not cause a load when the spring force of the pressing spring 207 rotates the valve pressing body 209, but the valve pressing body 209 and the valve rod 205 are Due to the separation, the valve body 204 is pressed in a state of being inclined with respect to the valve seat 202c when the valve is closed, and the seal may be unstable. Further, since both ends of the pressing spring 207 slide during rotation after sitting, the valve pressing body 209 is difficult to turn.

However, as shown in FIG. 1, when the engagement between the engagement hole 81 a of the second rod 8 and the pin 7 formed on the first rod 6 is released, the pressing spring 9 is moved between the first rod 6 and the piston 10. Is compressed to the full length L1. The spring force of the pressing spring 9 urges the diaphragm valve body 5 in the direction of the valve seat 43a via the second rod 8, and presses the diaphragm valve body 5 against the valve seat 43a. Therefore, the diaphragm valve body 5 is not pressed excessively against the valve seat 43a and seals uniformly.
When the valve is opened from this closed state, when the handle 2 is rotated, the handle 2 moves along the housing 3 in the counter valve seat direction. Until the engagement hole 81a is engaged with the pin 7, the pressing spring 9 is fully extended according to the movement of the handle 2 while urging the second rod 8 and the diaphragm valve body 5 toward the valve seat 43a via the piston 10. Extend to L2.

  When the handle 2 moves in the counter valve seat direction and the engagement hole 81 a and the pin 7 are engaged, the second rod 8 moves in the counter valve seat direction integrally with the handle 2 via the pin 7. In this case, since the distance between the first rod 6 and the piston 10 is constant, the handle 2 holds the diaphragm valve element 5 via the second rod 8 with the total length L2 of the pressing spring 9 constant. The valve seat is pulled up in the direction opposite to the valve seat 43a and separated from the valve seat 43a.

  When closing the valve from the valve open state, the handle 2 is rotated in the reverse direction and moved in the direction of the valve seat 43a. Since the pressing spring 9 is disposed in a state of being stretched between the first rod 6 and the piston 10, the handle of the first rod 6 is engaged with the engagement hole 81 a of the pin 7 and the second rod 8. 2 moves in the direction of the valve seat 43a. Therefore, the distance between the first rod 6 and the piston 10 is constant, and the total length L2 of the pressing spring 9 is constant.

  When the diaphragm valve body 5 comes into contact with the valve seat 43a, the handle 2 moves in the direction of the valve seat 43a while compressing the pressing spring 9, and the engagement between the engagement hole 81a and the pin 7 is released. The spring force of the pressing spring 9 urges the second rod 8 and the diaphragm valve body 5 in the direction of the valve seat 43a via the piston 10, and presses the diaphragm valve body 5 against the valve seat 43a.

As described above, when the engagement between the engagement hole 81a and the pin 7 is released, the handle 2 is rotated while the pressing spring 9 is compressed to the full length L1 between the first rod 6 and the piston 10, so the handle 2 is rotated. When rotating 2, a load due to the spring force of the pressing spring 9 is applied.
On the other hand, when the engagement hole 81a and the pin 7 are engaged, the handle 2, the first rod 6, and the pressing spring 9 move in the axial direction integrally with the entire length L2 of the pressing spring 9 being constant. When the handle 2 is rotated, a load due to the spring force of the pressing spring 9 is not applied. Therefore, only when the handle 2 starts to rotate from the valve closed state or when the handle 2 is rotated and the diaphragm valve body 5 is pressed against the valve seat 43a, the handle 2 is loaded by the pressing spring 9, and otherwise. In this case, the handle 2 is not loaded with the pressing spring 9, so that the operability is good.
In addition, there is a problem that the product height increases due to the structure in which the engagement hole 81a and the pin 7 are engaged and the second rod 8 is pulled up when the valve is opened. The product height can be kept low by receiving the piston 10 instead of the rod.

  Further, in the wear-type manual opening / closing valve 301 invented by the present applicant as shown in FIGS. 11 and 12, the male screw portion 302 a is provided on the outer periphery of the housing 302, and the female screw portion 303 a is provided on the inner periphery of the handle 303. The outer diameter of the housing 302 increases in accordance with the size of built-in objects such as the spring 304 and the spring receiver 305. Along with this, the screw diameter of the male screw portion 302a also increases, so that the contact area between the female screw portion 303a and the male screw portion 302a increases, so that the frictional resistance generated when the handle 303 is rotated increases. There is a problem that 303 is difficult to turn and operability is poor.

  However, in the wear-type manual on-off valve 1 of the present embodiment, the male screw portion 6 a is formed on the outer peripheral surface of the first rod 6, and the female screw portion 31 a is formed on the inner peripheral surface of the housing 3. Therefore, by providing the female screw portion 31a on the inner peripheral surface of the housing 3, the screw diameter of the male screw portion 6a can be reduced. Thereby, the contact area between the female screw portion 31a and the male screw portion 6a is reduced, and the frictional resistance generated when the handle 2 is rotated is small. Therefore, the handle 2 is easy to turn and has good operability.

The wear-type manual on-off valve 1 closes the valve by pressing the diaphragm valve body 5 against a valve seat 43a provided in a straight line so as to be orthogonal to the first flow path 4a and the second flow path 4b. Therefore, the flow path can be shielded while suppressing the overall height.
In addition, since the wear-type manual opening / closing valve 1 covers the breathing hole 31b provided in the housing 3 from the fully closed state shown in FIG. 1 to the fully opened state shown in FIG. Foreign matter and water can be prevented from entering the housing.

As described above, according to the wear-type manual on-off valve 1,
(1) The body 4 in which the weir 43 is formed between the first flow path 4a and the second flow path 4b, the valve seat 43a formed in the weir 43, and the diaphragm valve that contacts or separates from the valve seat 43a A body 5, a pressing spring 9 that presses the diaphragm valve body 5 against the valve seat 43 a when the valve is closed, a housing 3 that contains the pressing spring 9, a handle 2 that fits into the housing 3, and a diaphragm valve body 5. In a wear-type manual on-off valve 1 that is connected and includes a rod that is inserted through the housing 3 and the handle 2 and is held so as to be movable in the axial direction, the rods are a first rod 6 and a second rod that are arranged in the axial direction. 8, a male screw portion 6 a is formed on the outer peripheral surface of the first rod 6, and a female screw portion 31 a that is screwed with the male screw portion 6 a is formed on the inner peripheral surface of the housing 3. Therefore, the outer surface of the first rod 6 is male. Since the female screw portion 31a is formed on the inner peripheral surface of the housing 3, the screw diameter of the male screw portion 6a is reduced by providing the female screw portion 31a on the inner peripheral surface of the housing 3. can do. Thereby, the contact area of the internal thread part 31a and the external thread part 6a becomes small, and the frictional resistance generated when the handle 2 is rotated is small. Therefore, it is easy to turn the handle 2 and the operability is good.

(2) In the wear-type manual on-off valve 1 described in (1), a pin 7 is inserted into the second rod 8 side of the first rod 6, and the second rod 8 has a pin when the valve is opened. 7 is formed. When the engaging portion 81 and the pin 7 are engaged with each other, the handle 2 is kept in a state where the entire length L2 of the pressing spring 9 is constant. Since the first rod 6 and the pressing spring 9 are integrally moved in the axial direction, a load due to the spring force of the pressing spring 9 is not applied when the handle 2 is rotated. Therefore, only when the handle 2 starts to rotate from the valve closed state or when the handle 2 is rotated to press the valve body against the valve seat, the handle 2 is loaded by the pressing spring 9, and at other times, Since the handle 2 is not loaded with the pressing spring 9, the operability is good.

(3) In the wear-type manual opening / closing valve 1 described in (1) or (2), the second rod 8 includes a piston 10 that contacts one end of the pressing spring 9 and a bearing 13 that holds the piston 10 slidably. Since the slidability of the piston 10 is not impaired by the bearing 13 even if the pressing spring 9 or the piston 10 is inclined, the stability of the sealing force can be maintained. .

(4) In the wear-type manual on-off valve 1 according to any one of (1) to (3), the handle 2, the first rod 6 and the second rod 8 have a rotating means for rotating, Therefore, when the handle 2 is rotated, the pressing spring 9 rotates integrally with the handle via the first rod 6, the second rod 8, and the piston 10 (an example of a rotating means). Since the pressing spring 9 is disposed in a state of being stretched between the handle 2 and the piston 10 provided on the second rod 8, the pressing spring 9 rotates integrally with the handle 2 and the second rod 8. Therefore, the load when rotating the handle 2 is reduced.
On the other hand, the 1st rod 6 is connected with the 2nd rod 8, and is arranged so that reciprocating linear motion is possible in the direction of an axis. The second rod 8 is coupled together with the first rod 6 so as to allow rotation about the axis. The compressor 11 restricts relative rotation with the housing 3 by the keyway 3b. Therefore, the second rod 8 prevents the diaphragm valve body 5 from being worn because the compressor 11 does not rotate even when the first rod 6 rotates integrally with the handle 2. A sliding ring 15 is disposed on the tip surface of the second rod 8 and the sliding surface of the compressor 11 to reduce the sliding resistance of the second rod 8. Therefore, the load when rotating the handle 2 can be reduced, the operability can be improved, the wear of the diaphragm valve body 5 can be suppressed, and a stable seal can be maintained.

(5) The wear-type manual opening / closing valve 1 according to any one of (1) to (4) is characterized in that a vent hole 31c is formed on the upper surface of the housing 3, and the handle 2 is When it rotates, the volume between the handle 2 and the upper surface of the housing 3 changes, and a difference from the surrounding atmospheric pressure occurs. The larger this difference, the greater the load on turning the handle 2. The force to rotate 2 can be reduced. Therefore, the load when rotating the handle 2 can be reduced and the operability can be improved.

(6) The wear-type manual on-off valve 1 according to any one of (1) to (5) is characterized in that a packing 12 is mounted on the outer peripheral surface of the housing 3. Since the packing 12 is disposed between the handles 2, it does not enter the inside when it is cleaned with hydrogen peroxide solution or the like, and the grease does not leak out.

  In addition, this embodiment is only a mere illustration and does not limit this invention at all. Accordingly, the present invention can naturally be improved and modified in various ways without departing from the gist thereof.

DESCRIPTION OF SYMBOLS 1 Wear type manual on-off valve 2 Handle 3 Housing 31 Insertion part 31a Female thread part 31c Vent hole 4 Body 4a First flow path 4b Second flow path 43 Weir 43a Valve seat 5 Diaphragm valve element 6 First rod 6a Male thread part 7 Pin 8 Second rod 9 Pressure spring 10 Piston 12 Packing 13 Bearing

Claims (4)

A body in which a weir is formed between the first flow path and the second flow path; a valve seat formed in the weir; a valve body that contacts or separates from the valve seat; and the valve body when the valve is closed A pressure spring that presses against the valve seat; a housing that contains the pressure spring; a handle that fits into the housing; and a valve body that is inserted through the housing and the handle in the axial direction. In a wear-type manual on-off valve including a rod that is held movably,
The rod includes a first rod and a second rod arranged in an axial direction,
A male screw part is formed on the outer peripheral surface of the first rod, and a female screw part screwed with the male screw part is formed on the inner peripheral surface of the housing;
The second rod slides on an inner peripheral surface of a bearing disposed between the guide member and the housing via a piston- shaped guide member ;
Having a rotating means for rotating the handle and the pressing spring;
The guide member has a hollow cylindrical shape, one end is open, the other end has a bottom portion extending inward, and the bottom portion is formed with a hole into which the second rod is inserted at the center. Being
Some of the pressing spring, it abuts on the surface of the front Symbol bottom portion positioned on the handle side,
Wear-type manual open / close valve characterized by In the wear type manual on-off valve according to claim 1,
A pin is inserted through the second rod side of the first rod;
The second rod has an engaging portion that engages with the pin when the valve is opened.
Wear-type manual open / close valve characterized by In the wear type manual on-off valve according to claim 1 or 2,
A vent hole is formed on the upper surface of the housing;
Wear-type manual open / close valve characterized by In the wear type manual on-off valve according to any one of claims 1 to 3,
Packing is attached to the outer peripheral surface of the housing;
Wear-type manual open / close valve characterized by

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