JP5128331B2 - Indoor pressure measurement port and drip-proof hood used therefor - Google Patents

Description

  The present invention relates to an indoor pressure measuring port for measuring an internal pressure of a room where maintenance of airtightness or internal pressure such as a clean room is required, and a drip-proof hood used therefor.

  The clean room is normally maintained at a positive pressure with a predetermined differential pressure with respect to the outside air in order to prevent dust from entering from the outside. In addition, a clean room that requires a high degree of cleanness and a clean room that requires a lower degree of cleanness are adjacent to each other for the purpose of area classification to prevent contamination of products such as trace gas components contained in the air. If so, the differential pressure between the two is appropriately controlled so that the room pressure in the clean room, which requires a higher degree of cleanliness, is maintained somewhat high. On the other hand, in some cases, such as a hazard facility that accommodates highly infectious disease patients, negative pressure may be maintained against the outside air so that the virus does not leak outside. In these cases, it is necessary to constantly measure and monitor the differential pressure in the space of the reference pressure and the room. Therefore, in order to introduce the indoor pressure into the pressure gauge or the differential pressure gauge, a pressure guiding tube is disposed behind the wall panel or the ceiling panel, and one end thereof is opened to the indoor side.

  As an indoor pressure measurement port used for such a purpose, for example, an indoor pressure measurement port 100 shown in FIG. 7 is employed. The indoor pressure measuring port 100 includes two partition wall panels 101 (see Patent Document 4) arranged in parallel, a detection tube 103 passed through a through hole 102 formed in the wall panels, The detection tube 103 includes a nut 104 that is screwed into male threads formed on the outer periphery of both ends, and a pressure guide tube 105 that is connected to the rear end of the detection tube 103 and is piped into a space between the wall panels 101. Reference numeral 106 denotes a connecting pipe.

  A gap between the detection tube 103 and the through hole 102 is sealed with a caulking material 107, and a washer 108 is interposed between the nut 104 and the wall panel 101. The front end of the detection tube 103 protrudes toward the room P0. A silicone sealant or the like is used as the caulking material 107. In some cases, rubber packing and sealant are combined. The other end of the pressure guiding tube 105 penetrates the wall panel 101 with the same structure and is connected to a pressure gauge or a differential pressure gauge.

  In the indoor pressure measuring port 100 described above, the detection tube 103 is fastened with two nuts 104 and fixed to the wall panel 101. This is because the worker does not enter the space P1 between the two wall panels 101, and therefore, the installation work is performed in the work space P2 outside the other wall panel 101, such as the adjacent room or passage. Because. Each wall panel 101 is a plaster board with a surface coating or the like, and is fixed to a frame 109 made of a lightweight steel frame or the like by screws. The gap between the wall panels and the head of the screw are hermetically sealed with caulking material.

  The indoor pressure measuring port 110 shown in FIG. 8 is for opening the pressure guiding tube 105 piped to the back surface (back of the ceiling) P3 of the ceiling panel 111 through the ceiling panel 111 to the room P0 side. In the indoor pressure measurement port 110, a flat locking flange 112 is provided at the end of the detection tube 103 on the indoor side, and the detection tube 103 does not protrude toward the indoor side. And there is only one nut 104 on the back side. This is because there is a space for an operator to enter the back of the ceiling.

  Patent Document 1 discloses an example of a pressure sensor in which the other end of the pressure guiding tube in the room pressure measuring port of the present invention is connected. Patent Document 2 describes an aircraft pitot tube, which is a detection tube connected to a pressure gauge via a pressure guiding tube, and discloses a structure for draining water that has entered the pitot tube. FIG. 8 of Patent Document 3 discloses a generator pipe that penetrates a wall surface in an airtight manner. Patent Document 4 describes an example of a double partition wall. In Patent Document 5, when attaching a tube joint through a metal panel and allowing the fluid in the tube to flow through the panel, a nut is conventionally screwed from both sides of the panel. An example is described in which the urging means can be easily attached by sandwiching the urging means between the joint and the joint. Patent Document 6 describes a drip-proof hood that covers an opening portion of a ventilation port that is exposed outdoors, and a sleeve having a slightly small diameter is inserted into the opening end and sealing is performed at a flange portion.

Utility Model Registration No. 2578416 Japanese Utility Model Publication No. 5-32300 JP-A-8-75040 Japanese Utility Model Publication No. 5-47126 JP-A-6-94166 Japanese Patent Laid-Open No. 10-54596

  The indoor pressure measuring ports 100 and 110 shown in FIGS. 7 and 8 are simple, use a small number of parts, can be manufactured at low cost, and sufficiently satisfy necessary functions. However, it is difficult for the pressure guiding tube 105 to guide the tip of the pressure guiding tube to an appropriate position when performing piping work after panel attaching work. Therefore, it is necessary to perform the pressure guiding tube 105 between the time when the construction of the lightweight steel partition frame 109 is started and the time when the panel attaching operation is completed. After the panel pasting operation, the detection tube is attached to the panel. For this reason, it is troublesome to contact the contractors and adjust the process. Moreover, the flexible pressure guide tube 105 made of synthetic resin is easily damaged or broken when it is passed between the panels.

  Further, as can be seen from FIG. 7, when the detection tube 103 is attached to the wall panel 101, it is necessary to tighten the wall panel 101 on the side opposite to the indoor pressure measurement port with the nut 104, so that a work space is required behind the wall. . Similarly, in the case of FIG. 8, a work space behind the ceiling is required. However, it is desirable to reduce such space as much as possible because of the demand for cost reduction. Furthermore, since wiring work is required in addition to piping, installation work in a narrow space is becoming more difficult.

  By the way, when cleaning or cleaning a room such as a clean room, a cleaning liquid such as water is applied to the wall surface or ceiling surface with a hose. However, when the cleaning liquid enters the detection tube, an accurate pressure cannot be measured. Moreover, once the cleaning liquid enters the thin detection tube, as can be seen from Patent Document 2, it is difficult to remove the cleaning liquid, and eventually the room pressure cannot be measured until the cleaning liquid dries after being left for a certain period of time. For this reason, it is desirable to prevent the cleaning liquid from entering the opening of the tip of the detector.

  In view of the problem of the conventional indoor pressure measuring port, the present invention can easily connect the pressure guiding tube even after the wall panel or the ceiling panel is attached, and can easily attach the detection tube to the panel from the indoor side. The technical challenge is to provide an indoor pressure measuring port. Furthermore, a second technical problem of the present invention is to prevent the cleaning liquid from entering the detection tube of the indoor pressure measurement port during cleaning.

The indoor pressure measuring port of the present invention is an indoor interior panel having an opening, a protection tube having an end disposed near the opening on the back side of the panel, and inserted into the protection tube. A flexible pressure guiding tube extending from the end opening of the protective tube in the vicinity of the end, a cover plate attached from the indoor side for airtightly closing the opening of the panel, and front and rear of the cover plate A detection tube that communicates and holds an end portion of the pressure guiding tube; and a drip-proof hood that covers the opening of the indoor side end portion of the detection tube with a space therebetween, and the front end side of the detection tube is a cover plate The drip-proof hood has a cylindrical shape composed of a flat back surface portion attached to the cover plate and a curved or bent front surface portion connecting the left and right ends of the back surface portion, Previous Is characterized in that openings through the sensing tube to the back portion is formed (claim 1).

In such a structure, a locking rod or nut is provided at a portion of the opening on the indoor side of the detection tube protruding from the indoor side of the detection tube, and the locking rod or nut and cover are provided. It is preferable that the back part of the drip-proof hood is sandwiched between the plates (Claim 2). Moreover, what is equipped with the support tool which fixes the edge part of the said protection tube to the opening part vicinity of a panel is preferable (Claim 3). In that case, the support is a box-shaped outlet box arranged so as to cover the opening of the panel from the back side, and the end of the protective tube is fixed to the side wall or bottom wall of the outlet box (Claim 4).

  In addition, it further includes a seal box including a box portion inserted into the opening of the panel from the indoor side, a flange extending from the opening end of the box portion and sandwiched between the panel and the cover plate, More preferably, the box portion is formed with a thick-walled portion in which a hole for allowing the pressure guiding tube to pass through hermetically is formed (Claim 5). Further, it is preferable that the front end side of the detection tube protrudes from the front surface of the cover plate and the rear end side protrudes to the back side of the cover plate so as to be connected to the pressure guiding tube.

The drip-proof hood for an indoor pressure measuring port of the present invention is formed by bending a left and right rectangular metal thin plate to the back by bending the left and right sides so that the central portion protrudes to the front side. A notch through which the detection tube is passed is formed on either the left or right edge or both edge edges of the front surface portion (claims 7 and 8 ).

  In the indoor pressure measuring port of the present invention (Claim 1), the room and the back of the panel are in large communication with each other through the opening, and the pressure guiding tube is passed through a protective tube whose end is open near the opening. From the protective tube. For this reason, if a protective tube is piped when the lightweight steel partition frame is installed, the pressure guiding tube can be passed through the protective tube even after the panel is attached to the lightweight steel frame. The end of the tube can be easily taken out from the indoor side. Therefore, after the panel installer completes the panel installation work, the installer of the indoor pressure measuring device can perform the installation of the piping of the pressure guiding tube and the indoor pressure measuring port together, and no complicated adjustment of the installation procedure is required. It is.

  Then, the end of the pressure guiding tube taken out to the indoor side is connected to the rear end of the detection tube communicating with the cover plate, and the cover plate is attached to the panel from the indoor side to close the opening, thereby easily measuring the indoor pressure measuring port. Can be completed. Furthermore, since these operations can be performed from the room where the pressure is to be measured, a large space is not required behind the wall or the ceiling. That is, the structure of the present invention has a larger number of parts than the conventional structure of FIGS. 7 and 8, a wider range to be sealed, a longer length, and a gap that is difficult to seal. There is an advantage that it is not necessary to coordinate with other constructions and that the construction schedule can be independently set. Moreover, the construction work itself is easy.

The opening of the indoor-side end of the sensing tube, so that further includes a drip-proof hood for covering at intervals, when cleaning and washing room, washing liquid to the tip opening of the sensing tube also over the cleaning liquid in the hose Is difficult to enter. Therefore, after washing, the room pressure can be measured immediately without waiting for it to dry.
Further, the front end side of the detection tube protrudes indoors from the cover plate, and the drip-proof hood includes a flat back surface portion attached to the cover plate and a curved or bent front surface portion connecting the left and right ends of the back surface. Since the opening through which the detection tube is passed is formed in the back surface portion, the drip-proof hood can be easily attached to the cover plate and the opening of the detection tube can be sufficiently covered.
A locking rod or nut is provided at a portion where such an indoor measurement port protrudes to the indoor side of the detection tube, and the back portion of the drip-proof hood is provided between the locking rod or nut and the cover plate. (Claim 2), the drip-proof hood can be attached to the cover plate with a simple structure, and the locking rod or nut is used to attach the detection tube and drip-proof hood. Can be combined.

  The indoor pressure measurement port (Claim 3) provided with a support that fixes the end of the protective tube near the opening of the panel can maintain the position and direction of the end of the protective tube accurately. . Therefore, the pressure guiding tube can be easily taken out from the opening to the indoor side.

  The support is a box-shaped outlet box disposed so as to cover the opening of the panel from the back side, and the end of the protective tube is fixed to the side wall or the bottom wall of the outlet box (claims) In 4), when the pressure guiding tube is passed through the protective tube, the vicinity of the end of the pressure guiding tube coming out of the protective tube is accumulated in the outlet box. Therefore, it is easy to take out the end portion of the pressure guiding tube from the opening of the panel to the indoor side.

  A seal box comprising: a box portion inserted into the opening of the panel from the room side; and a flange extending from the opening end of the box portion and sandwiched between the panel and the cover plate; In the case where a thick-walled portion in which a hole for allowing the pressure guiding tube to pass through hermetically is formed in the portion (Claim 5), the gap between the cover plate and the panel can be sealed with the flange of the seal box. In addition, there is a gap between the detection tube and the cover plate, and even if the airtightness in the room and in the seal box is insufficient, the airtightness in the room is more reliably maintained because the seal is made between the pressure guiding tube and the seal box. be able to.

  When the front end side of the detection tube protrudes from the front surface of the cover plate and the rear end side protrudes to the back side of the cover plate so as to be connected to the pressure guiding tube (Claim 6), Even when it bounces off when it hits or when the cleaning liquid flows down along the wall surface, the cleaning liquid does not easily enter the detection tube. Moreover, it is easy to connect the pressure guiding tube to the rear end side of the detection tube.

The drip-proof hood for an indoor pressure measurement port of the present invention (Claims 7 and 8 ) can cover the tip opening of the detection tube of the measurement port with a simple configuration, and is easy to manufacture and attach. And after installing the back part divided into right and left so that it may be pinched | interposed from the right and left of a detection tube, a drip-proof hood and a cover plate can be clamped together with a nut etc. for tightening.

  Next, embodiments of the indoor pressure measuring port and the drip-proof hood of the present invention will be described with reference to the drawings. 1 is a cross-sectional view showing an embodiment of the indoor pressure measuring port of the present invention, FIG. 2 is a perspective view showing a state in the middle of assembling the indoor pressure measuring port of FIG. 1, and FIG. 3 is a view of the indoor pressure measuring port of FIG. FIG. 4 is a perspective view showing an embodiment of the drip-proof hood of the present invention, FIG. 5 is a development view of the drip-proof hood of FIG. 4, and FIGS. 6a, 6b and 6c are FIG. It is a rear view, a side view, and a top view of the drip-proof hood.

  The indoor pressure measuring port 10 shown in FIGS. 1 and 2 includes a wall panel 11 for interior decoration, an outlet box 12 arranged on the back side of the wall panel 11 (right side in FIG. 1), A seal box 14 that is inserted into the opening 13 of the wall panel from the indoor side and seals the opening 13; and a cover plate 15 that is attached around the opening of the wall panel 11 so as to close the opening of the seal box 14. It has. A detection tube 16 is attached to pass through substantially the center of the cover plate 15, and an end portion of the pressure guiding tube 17 is connected to the rear end of the detection tube 16 via a connector 18. Furthermore, one end of a protective tube 19 that protects the pressure guiding tube 17 is connected to the outlet box 12. In FIG. 1, a drip-proof hood 40 that covers the front (inside the room) of the detection tube 16 is shown. In FIG. 2, the drip-proof hood is omitted.

  The wall panel 11 is the same as the conventional one, and for example, a gypsum board, a foamed resin board, a veneer board or the like having a surface coated with a synthetic resin is used. The wall panel 11 is attached to the frame (see reference numeral 36 in FIG. 3) with screws or the like. The opening part 13 of the wall panel 11 confirms the attachment position of the outlet box 12, and opens it by site construction. However, it may be attached to the frame before forming the opening, and then a small opening may be formed, and then the opening may be formed along the inner surface of the outlet box 12.

  The outlet box 12 is a box made of metal or synthetic resin, and as shown in FIG. 2, a flange or a bent piece 22 for fixing to the wall panel 11 or the frame is provided in the vicinity of the opening. In the center of the bent piece 22, a female screw or a hole through which a screw is passed is formed. Instead of the outlet box 12, the end portion of the protective tube 19 can be fixed with another form of support such as an L-shaped bracket. However, when the pressure guiding tube 17 is passed, the vicinity of the end portion of the pressure guiding tube 17 coming out from the protective tube 19 can be received so as not to hang downward, and the seal box 14 can be protected. In particular, the outlet box 12 is preferably used. The outlet box 12 may not have airtightness.

  As the outlet box 12, a commercially available terminal box (outlet box) for indoor wiring can be used. However, it may be newly manufactured. Some outlet boxes for electric wiring on the market are provided with a temporary lid for forming a hole through which an electric wire is passed. In that case, the temporary lid at the position where the protective tube 19 is attached is knocked down to open the protective tube. The tip of 19 is inserted into the opening, and the end of the protective tube 19 is fixed with two plate nuts 23 or the like.

  As the protective tube 19, a commercially available flexible protective tube for electric wires, such as a flexible tube (flexible tube) in which a spiral or coiled metal wire is connected with a synthetic resin, a mesh tube, or the like, can be used. However, it is preferable that the inner surface is smooth so that the pressure guiding tube 17 can be passed smoothly. When a flexible tube having a spiral ridge is employed, the plate nut 23 can be screwed using the ridge.

  As the pressure guiding tube 17, a tube made of a synthetic resin similar to that attached to the pressure gauge or the differential pressure gauge is used. Polyamide, polyethylene, polypropylene, polyethylene terephthalate, etc. are used as the material of the pressure guiding tube 17, but it has rigidity and airtightness that does not collapse even under negative pressure, and has moderate flexibility or flexibility. If it is. The outer diameter of the pressure guiding tube 17 is usually about 3 to 16 mm, and the inner diameter is about 2 to 12 mm.

  The seal box 14 includes a box-like or deep dish-like box part 24 and a flange 25 that spreads from the periphery of the opening end of the box part 24. The box portion 24 hermetically closes the opening 13 of the wall panel 11 while accommodating the rear portion of the detection tube 15 and the vicinity of the end portion of the pressure guiding tube 17, and is formed from the rectangular bottom surface 24 a and the surrounding side wall 24 b. It is configured. However, the thickness and shape are not limited by the pressure difference between the indoor side and the back side of the wall panel, and the shape is not limited to a rectangular tube shape, and may be a cylindrical shape or a hemispherical shape.

  As shown in FIG. 1, the bottom surface 24 a is formed with a thick portion 26 projecting to the back side, and a hole through which the pressure guiding tube 17 is passed is formed in the thick portion 26. As a result, the pressure guiding tube 17 can be firmly held, and airtightness can be easily maintained. A reference numeral 37 in FIG. 1 is a caulking material for sealing a gap between the hole through which the pressure guiding tube 17 passes and the pressure guiding tube 17.

  The flange 25 of the seal box 14 is interposed between the cover plate 15 and the wall panel 11, and acts as a packing or gasket for sealing between them. The cover plate 15 passes through the flange 25 of the seal box 14 with screws 27 in FIG. As the screw, a tapping screw having a cone at the tip which can be screwed without a pilot hole is preferable. The screw 27 can be passed through the wall panel 11 and screwed into a female screw formed on the bent piece 22 of the outlet box 12 to be fixed. In that case, the outlet box 12 is temporarily held on the frame and fixed to the wall panel 11 with screws 27.

  The seal box 14 is usually molded from rubber or soft synthetic resin so as to exhibit a sealing function when sandwiched. However, it can be formed of a hard synthetic resin or a metal plate. In that case, a necessary portion is sealed with a caulking material such as a sealant, or a sealing material such as a rubber sheet or a gasket separate from the seal box 14 is used. Note that the seal material may be integrated into the seal box 14 by baking or bonding.

  The cover plate 15 is a hard plate material that closes the opening of the seal box 14 and supports the detection tube 16. The cover plate 15 can be formed of a metal plate or a synthetic resin plate. As shown in FIG. 2, a holding hole 28 for holding through the detection tube 16 is formed substantially at the center of the cover plate 15, and a screw through hole 29 for passing a screw 27 is provided at two or four corner portions. Is formed.

  The detection tube 16 includes an insertion portion (rear portion) 31 inserted into the holding hole 28 of the cover plate 15, a locking rod 32 that comes into contact with the front surface of the cover plate 15, and a protruding portion (front portion) that protrudes to the front side (indoor side). Part) 33 and a substantially cylindrical member. A vent hole 34 passes through the center of the detection tube 16 in the axial direction. The outer periphery of the locking rod 32 is formed in a hexagonal surface, and a male screw is formed on the outer periphery of the insertion portion 31. After inserting the insertion portion 31 into the holding hole 28 of the cover plate 15, the detection tube 16 is fixed to the cover plate 15 by tightening from the back side of the cover plate 15 with a nut 35 screwed with the male screw. At that time, the hexagonal surface on the outer periphery of the locking rod 32 can be held so as not to rotate with a spanner.

  In the embodiment of FIG. 1, the locking rod 31, the insertion portion 31, and the protruding portion 33 are integrally formed, but a separate nut can be used instead of the locking rod 32. In that case, the protruding portion 33 and the insertion portion 31 are integrated, a male screw is formed on the protruding portion 33 side, and a nut screwed into the male screw is used as a locking rod. In contrast to the case of FIG. 1, an integral locking rod can be provided on the rear side of the detection tube 16. In that case, the detection tube 16 is inserted into the holding hole 28 from the back side of the cover plate 15.

  Next, the overall flow of the assembly process of the indoor pressure measuring port 10 configured as described above will be described with reference to FIG. First, the partition wall installer assembles the frame 36. And before attaching a wall panel, the contractor of an internal pressure measuring apparatus attaches the outlet box 12 and the protection tube 19 to the frame 36 (1st process S1). The protective tube 19 may be piped after the outlet box 12 is attached. The pressure guiding tube is not yet inserted into the protective tube 19. Since there is no wall panel in this state, the protection tube 19 and the outlet box 12 can be easily attached. In addition, since the protection tube 19 and the outlet box 12 are structural parts, you may make it install the contractor of a partition wall. Also, the installation work may be outsourced to an electric wiring contractor.

  Next, the partition wall installer attaches the wall panel 11 to the frame body 36 (second step S2). At this time, the opening 13 may be formed at a predetermined position of the wall panel 11 as designed in advance, or the opening 13 may be formed after the wall panel 11 is attached.

  Next, the contractor of the internal pressure measuring device passes the pressure guiding tube 17 through the protective tube 19 and draws the tip from the opening 13 of the wall panel 11. The protective tube 19 passes between the two wall panels 11 while being curved, but the pressure guiding tube 17 is passed along the curve. And the front-end | tip of the pressure guide tube 17 is pulled out indoors from the opening part 13 of the wall panel 11 (3rd process S3). First, the wire or string is passed through the protective tube 19 first, the pressure guiding tube 17 is connected to the end of the wire or string, and the wire or string is pulled from the other end of the protective tube 19 so that the pressure guiding tube 17 is pulled. It may be allowed to pass through the protective tube 19.

  Next, the vicinity of the end portion of the pressure guiding tube 17 drawn out indoors is passed through the seal box 14, the nut 35 and the cover plate 15, and the tip is connected to the detection tube 16. Next, as shown in FIG. 1, the seal box 14 and the cover plate 15 are fixed to the wall panel 11. As shown in FIG. 1, the gap between the pressure guiding tube 17 and the hole through which the pressure guiding tube of the seal box 14 passes is sealed in advance with a sealant 37. Further, the periphery of the flange 25 of the seal box 14 and the periphery of the cover plate 15 are also sealed with a sealant 38. Thereby, the indoor pressure measuring port 10 of FIG. 1 is assembled.

  The indoor pressure measuring port 10 assembled as described above has a larger number of parts than the conventional measuring port of FIG. 7, but since it can be attached from the indoor side, the wall panel supplier of the partition wall There is almost no need to adjust the construction schedule, and the construction can be carried out on its own schedule. In addition, there is an advantage that the mounting work can be greatly simplified, such that the pressure guiding tube 17 can be pulled out indoors and connected to the detection tube 16.

  FIG. 4 shows a drip-proof hood 40 used for the indoor pressure measuring port 10 of FIG. This drip-proof hood 40 has a cylindrical shape with a semicircular cross section comprising a flat back surface portion 41 that is in contact with the front surface of the cover plate and a curved or bent front surface portion 42 that connects the left and right ends of the back surface portion. (See FIGS. 6a and 6b). And the opening 43 which lets a detection tube pass is formed in the center of the back part 41 (refer FIG. 6c). The left and right width W of the back surface portion 41 is 50 to 150 mm, particularly 100 mm, and the height H is 50 to 150 mm, particularly 100 mm. The diameter of the opening 43 is 15 mm or 17 mm according to the piping standard.

  This drip-proof hood 40 is formed with semicircular cutouts 46 at the upper and lower centers of the left and right end edges 45 of the rectangular thin metal plate 44 shown in FIG. Can be manufactured by bending at a substantially right angle and then bending the region 48 between the left and right fold lines 47 in a semicircular shape so that the edges 45 abut or approach each other. That is, the space between the fold line 47 and the edge 45 is the back surface portion 41 of FIG. 4, the left and right cutouts 46 are both openings 43 (see FIG. 6a), and the range 48 between the curved fold lines 47 is the front surface. Part 42. The cutout 46 can be formed only in the edge 45 on one side. In that case, it becomes a deep cutout.

  The material of the metal thin plate 44 is preferably a material that is not easily rusted and does not require painting, such as aluminum or stainless steel, and that can be easily bent. It is preferable that the left and right end edges 45 are not joined to each other and can be opened and closed using the flexibility of the metal thin plate. A gap G of about 0.5 to 1 mm is formed between the left and right edges. 1 can be inserted between the locking rod 32 of the detection tube 16 and the cover plate 15 in the open state, and the drip-proof hood can be inserted while the detection tube 16 is inserted into the holding hole 28 of the cover plate 15. 40 attachments can be made. When the detection tube 16 is not freely opened and closed, the detection tube 16 is attached to the insertion portion 31 of the detection tube before being inserted into the holding hole 28, or the detection tube 16 is attached with the cover plate 15 and the drip-proof hood 40 overlapped.

  When the drip-proof hood 40 is attached as shown in FIG. 1, the vent hole 34 of the detection tube 16 can be covered with an interval, and the cleaning liquid can be prevented from entering the vent hole 34 when cleaning a clean room or the like.

  The drip-proof hood 40 can be made of a metal plate or a synthetic resin. Further, the front surface portion may be bent in a semicircular cross section, may be bent in an elliptical shape, or may be bent in a triangular shape, a trapezoidal shape, or a rectangular shape. The drip-proof hood 40 is attached so that the opening faces up and down. As a result, the cleaning liquid easily flows down.

  Although the said embodiment demonstrated the indoor pressure measurement port attached to a wall panel, it can attach similarly to the ceiling panel of FIG. Also in this case, since the installation work can be performed from the indoor side, it is not necessary to adjust the work schedule with the supplier of the ceiling panel, and the installation work is simplified. In addition, when a drip-proof hood is attached, the cleaning liquid can be prevented from entering the detection tube.

It is sectional drawing which shows one Embodiment of the indoor pressure measurement port of this invention. It is a perspective view which shows the state in the middle of the assembly | attachment of the indoor pressure measurement port of FIG. It is process drawing which shows the assembly | attachment procedure of the indoor pressure measuring port of FIG. It is a perspective view showing one embodiment of a drip-proof hood of the present invention. FIG. 5 is a development view of the drip-proof hood of FIG. 4. 6a, 6b and 6c are a rear view, a side view and a plan view of the drip-proof hood of FIG. 4, respectively. It is sectional drawing which shows an example of the conventional indoor pressure measurement port. It is sectional drawing which shows the other example of the conventional indoor pressure measurement port.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Indoor pressure measurement port 11 Wall panel 12 Outlet box 13 Opening part 14 Seal box 15 Cover plate 16 Detection pipe 17 Pressure guide tube 18 Connector 19 Protective tube 22 Bending piece 23 Plate nut 24 Box part 24a Bottom face 24b Side wall 25 Flange 26 Thickness Meat part 27 Screw 28 Holding hole 29 Screw through hole 31 Insertion part 32 Locking rod 33 Protrusion part 34 Vent hole 35 Nut 36 Frame body 37, 38 Sealant 40 Drip-proof hood 41 Rear part 42 Front part 43 Opening 44 Metal thin plate 45 End Edge 46 Notch 47 Folding line 48 Range between left and right folding lines W Left and right width H Height G Gap

Claims (8)

An indoor interior panel having an opening;
A protective tube whose end is located near the opening on the back side of the panel;
A flexible pressure guiding tube that is inserted into the protective tube and has an end portion extending from an end opening of the protective tube;
A cover plate attached from the indoor side to hermetically close the opening of the panel;
A detection tube that communicates the front and back of the cover plate and holds the end of the pressure guiding tube ;
A drip-proof hood that covers the opening at the end of the indoor side of the detection tube at an interval, and
The front end side of the detection tube protrudes indoors from the cover plate,
The drip-proof hood has a cylindrical shape composed of a flat back surface portion attached to the cover plate and a curved or bent front surface portion connecting the left and right ends of the back surface portion,
An indoor pressure measurement port in which an opening through which the detection tube is passed is formed in the back surface portion . A locking rod or nut is provided at a portion of the detection tube that protrudes to the indoor side, and a back surface portion of the drip-proof hood is sandwiched between the locking rod or nut and the cover plate. Item 1. The indoor pressure measurement port according to Item 1.   The indoor pressure measuring port according to claim 1 or 2, further comprising a support that fixes an end of the protective tube to the vicinity of the opening of the panel.   The said support tool is a box-shaped outlet box arrange | positioned so that the opening part of a panel may be covered from a back side, The edge part of the protection tube is being fixed to the side wall or bottom wall of the outlet box. Indoor pressure measurement port.   A seal box comprising: a box portion inserted into the opening of the panel from the room side; and a flange extending from the opening end of the box portion and sandwiched between the panel and the cover plate; The indoor pressure measurement port according to any one of claims 1 to 4, wherein a thick wall part is formed with a hole that allows the pressure guiding tube to be airtightly penetrated in the part. The indoor pressure measuring port according to any one of claims 1 to 5, wherein a front end side of the detection tube protrudes from a front surface of the cover plate, and a rear end side protrudes to the back side of the cover plate so as to be connected to the pressure guiding tube. A drip-proof hood for a chamber pressure measuring port according to any one of claims 1 to 6, and a rear portion by bending the left and right long rectangular sheet metal to the right and left one in the rear, a central portion A drip-proof hood that is bent or bent so as to protrude to the front side and has a front part, and a notch through which a detection tube passes is formed on either the left or right edge. A panel for indoor interior having an opening, a protective tube having an end disposed near the opening on the back side of the panel, and inserted into the protective tube, the vicinity of the end being an end of the protective tube A flexible pressure guiding tube extending from the opening, a cover plate attached from the indoor side for airtightly closing the opening of the panel, and the front and back of the cover plate communicate with each other, and the end of the pressure guiding tube A drip-proof hood for an indoor measurement port provided with a drip-proof hood that covers the opening at the indoor side end of the detection tube with an interval,
A sheet of rectangular metal sheet that is long on the left and right is bent back and forth to make it the back part, and the center part is bent or bent so as to protrude to the front side to make the front part. A drip-proof hood with a notch through which the detection tube passes.

Images