Sensor mounting jig

Abstract

To provide a sensor attachment jig capable of regulating movement of a sensor holder with respect to a sensor mount.SOLUTION: A sensor attachment jig 1 to which a sensor S for acquiring flow velocity information in a conduit (water service pipe 2) in which fluid circulates can be attached includes: a sensor mount 10 having a first through hole 14 communicating with an opening 3a which is formed at the conduit (water service pipe 2); and a sensor holder 20 which is arranged at the sensor mount 10 in a manner to penetrate the opening and the first through hole 14, and to which the sensor is attached. The sensor mount 10 and the sensor holder 20 have contact surfaces which are perpendicular to a penetration direction of the sensor holder 20, and when the sensor mount 10 and the sensor holder 20 are fixed with each other, the contact surface of the sensor mount 10 and the contact surface of the sensor holder 20 come into surface contact with each other.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a technology for a sensor mounting jig capable of mounting a sensor for acquiring information about the inside of a pipeline through which a fluid flows. [Background technology]

[0002] Conventionally, there are known technologies for devices that acquire information about the inside of a pipeline. For example, Patent Document 1 discloses a non-stop water supply pipe inspection device that can insert an inspection rod to inspect the inside of the pipe into an inspection hole formed in the middle of the pipe.

[0003] The non-stop water pipe investigation device described in Patent Document 1 comprises a penetration flange that closes the investigation hole and a gate valve installed below the penetration flange. An investigation rod can be inserted into the penetration flange while maintaining watertightness. With this configuration, by inserting the investigation rod into the penetration flange and fully opening the gate valve, investigation inside the pipeline can be carried out without interrupting the water supply. After the investigation is completed, the gate valve is fully closed to stop the water flow in the investigation hole, and the investigation rod is then removed.

[0004] In the above device, a round rubber ring for watertightness is interposed between the penetration flange and the inspection rod, and the inspection rod inserted into the penetration flange is fixed to the penetration flange via the round rubber ring. Therefore, when the inspection rod is subjected to pressure from the water flow in the pipeline, the round rubber ring may be deformed by the load of the pressure, and the inspection rod may tilt relative to the penetration flange. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 63-62754 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in view of the above circumstances, and the problem to be solved by the present invention is to provide a sensor mounting jig that can restrict movement of a sensor holder relative to a sensor mount. [Means for solving the problem]

[0007] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0008] That is, in claim 1, a sensor mounting jig capable of mounting a flow velocity sensor that acquires flow velocity information in a pipeline through which a fluid flows includes a sensor mount having a first through hole that communicates with an opening formed in the pipeline, and a sensor holder that is provided in the sensor mount so as to pass through the opening and the first through hole and to which the flow velocity sensor is mounted, wherein the sensor mount and the sensor holder each have a contact surface that is a surface perpendicular to the insertion direction of the sensor holder, and are configured so that when the sensor mount and the sensor holder are fixed to each other, the contact surface of the sensor mount and the contact surface of the sensor holder are in surface contact. The sensor holder has a portion where the contact surface is formed and a portion where the flow velocity sensor is attached, which are integrally formed. It is something.

[0009] In claim 2, the flow velocity sensor acquires the flow velocity information by means of a strain gauge. [Effects of the Invention]

[0010] The present invention has the following effects.

[0011] According to claim 1, movement of the sensor holder relative to the sensor mount can be restricted.

[0012] In claim 2, the movement of the flow velocity sensor using the strain gauge can be restricted. [Brief explanation of the drawings]

[0013] [Figure 1]FIG. [Figure 2] (a) is a front cross-sectional view showing the sensor mount, and (b) is a plan view showing the sensor mount. [Figure 3] 1A is a front cross-sectional view showing the sensor holder, FIG. 1B is a side cross-sectional view showing the lower part of the sensor holder, and FIG. 1C is a plan view showing the sensor holder. [Figure 4] FIG. [Figure 5] (a) is a front cross-sectional view showing the mounting portion, (b) is a front cross-sectional view showing the advance / retract portion. [Figure 6] FIG. [Figure 7] FIG. 10 is a front cross-sectional view showing how a water stop pin is attached to the sensor mount. [Figure 8] FIG. 10 is a front cross-sectional view showing how the sensor holder inserted into the sensor mount is pulled up. [Figure 9] FIG. 10 is a front cross-sectional view showing the state in which the advance / retract part is advanced into the horizontal hole part. [Figure 10] FIG. 10 is a front cross-sectional view showing how the water stopping portion stops water. DETAILED DESCRIPTION OF THE INVENTION

[0014] In the following description, the directions indicated by arrows U, D, F, B, L, and R in the drawings are defined as the upward, downward, forward, backward, leftward, and rightward directions, respectively. Note that the drawings used in the following description are schematic diagrams, and the shapes and dimensions of each component are appropriately exaggerated for ease of explanation. Therefore, the specific shapes and dimensions of each component are not limited to those shown in the drawings.

[0015] A sensor mounting jig 1 according to one embodiment of the present invention will be described below with reference to the drawings.

[0016] The sensor mounting jig 1 is used to mount a sensor S that acquires information about the inside of a pipeline through which a fluid flows. The sensor S according to this embodiment is capable of acquiring information about water flowing inside a water pipe 2 (pipe). Below, the water pipe 2 and the sensor S will be described first with reference to FIG. 1.

[0017] A water pipe 2 shown in FIG. 1 is buried underground. The water pipe 2 is formed so as to extend in the front-to-rear direction. A branch section 3, which is a flow path that branches upward, is provided midway through the water pipe 2. The branch sections 3 are formed at multiple locations on the water pipe 2. The branch sections 3 are formed with openings 3a that communicate with the interior of the water pipe 2. The upper part of the branch section 3 and the sensor mounting jig 1 are located, for example, inside a valve box installed above the water pipe 2.

[0018] The sensor S is capable of acquiring the flow velocity of water flowing inside the water pipe 2. In the sensor S, strain gauges are provided on the surfaces (front and rear surfaces) of an elastically deformable plate-shaped member. The sensor S acquires the flow velocity of water flowing inside the water pipe 2 by detecting the deformation of the plate-shaped member due to the pressure of the water with the strain gauges (see Figure 3(b)). Appropriate lead wires are connected to the strain gauges.

[0019] Next, the detailed configuration of the sensor mounting jig 1 will be described with reference to Figures 1 to 6. As shown in Figure 1, the sensor mounting jig 1 is attached to a branch section 3, and positions a sensor S inside a water pipe 2. The sensor mounting jig 1 includes a sensor mount 10, a sensor holder 20, and a water stop pin 100.

[0020] 1 and 2 is attached to the branching portion 3 and holds a sensor holder 20, which will be described later. The sensor mount 10 is formed in a generally cylindrical shape with expanded diameters at the top and bottom ends. The sensor mount 10 has a central portion 11, an upper portion 12, a lower portion 13, a first through-hole 14, and a horizontal hole portion 15.

[0021] 2 constitutes the vertical center portion of the sensor mount 10. The central portion 11 is formed in a vertically elongated shape.

[0022] The upper portion 12 constitutes the upper end portion of the sensor mount 10. The upper portion 12 is formed in a shape (approximately disk-shaped) that is larger in diameter than the central portion 11.

[0023] The lower portion 13 constitutes the lower end portion of the sensor mount 10. The lower portion 13 is formed to have a larger diameter than the central portion 11. The vertical dimension of the lower portion 13 is formed to be larger than the vertical dimension of the upper portion 12. The lower portion 13 is fixed to the branch portion 3 using an appropriate fastener.

[0024] The first through hole 14 passes vertically through the sensor mount 10 (the central portion 11, the upper portion 12, and the lower portion 13). The inner diameter of the first through hole 14 is formed to be approximately the same as the inner diameter of the opening 3a. The first through hole 14 is positioned so as to approximately overlap with the opening 3a in a plan view (see FIG. 1). The first through hole 14 communicates with the opening 3a.

[0025] The lateral hole 15 is a hole formed in the lower portion 13 so as to extend in the radial direction (left-right direction). More specifically, the lateral hole 15 is formed so as to extend from the left surface of the lower portion 13 to a portion to the right of the first through hole 14. The lateral hole 15 communicates with the first through hole 14 so as to intersect with the first through hole 14. In this embodiment, the lateral hole 15 is formed so as to be perpendicular to the first through hole 14. The lateral hole 15 includes a first portion 16, a second portion 17, a third portion 18, and a step portion 19.

[0026] The first portion 16 constitutes the left portion of the horizontal hole portion 15. An internal thread portion 16a is formed on the inner surface of the first portion 16 by thread machining. The first portion 16 is formed in a tapered shape (the diameter gradually decreases toward the right). The first portion 16 is located to the left of the first through hole 14.

[0027] 2(a), a plug 16b having a thread formed thereon that fits into the female thread portion 16a can be attached to the first portion 16. With the plug 16b attached, the first portion 16 is waterproofed.

[0028] The second portion 17 constitutes the center portion in the left-right direction of the lateral hole portion 15. The inner diameter of the second portion 17 is smaller than the inner diameter of the first portion 16. The second portion 17 communicates with the first through hole 14 so as to be perpendicular to the first through hole 14. The second portion 17 overlaps with the first through hole 14 in a plan view.

[0029] Third portion 18 constitutes the right portion of lateral hole portion 15. The inner diameter of third portion 18 is smaller than the inner diameter of second portion 17. Third portion 18 is located to the right of first through hole 14.

[0030] The step portion 19 is a portion that connects the second portion 17 and the third portion 18. The step portion 19 forms a surface (a surface facing left) that is perpendicular to the second portion 17 and the third portion 18. Note that instead of the above embodiment, the step portion 19 may be formed, for example, as an inclined surface whose diameter gradually decreases from the second portion 17 toward the third portion 18 (to the right).

[0031] 1 and 3 is held by the sensor mount 10 and has a sensor S attached thereto. The sensor holder 20 is formed in a generally cylindrical shape with an expanded diameter at the top end. The sensor holder 20 includes a main body 21, a sensor attachment portion 22, an upper portion 23, a second through-hole 24, and a pressure outlet 25.

[0032] The main body 21 shown in FIG. 3 is the main structure of the sensor holder 20. The main body 21 is formed in a vertically elongated shape. The main body 21 is inserted into the first through hole 14 of the sensor mount 10. The outer diameter of the main body 21 is formed to be slightly smaller than the inner diameter of the first through hole 14. The main body 21 includes a groove 21a and an O-ring 21b.

[0033] 3(a) is a recessed portion on the side surface of the main body portion 21. The groove portion 21a is formed to extend in the circumferential direction of the main body portion 21. A pair of the groove portions 21a is formed at a distance above and below the lower portion of the main body portion 21. The lower groove portion 21a of the pair of groove portions 21a is formed at the lower end portion of the main body portion 21.

[0034] The O-ring 21b is a ring-shaped member that fills the gaps between the side surface of the main body 21 and the inner surfaces of the opening 3a and the first through-hole 14 (see FIG. 1). The O-ring 21b is made of a flexible material such as rubber. The O-rings 21b are provided in the pair of grooves 21a, respectively.

[0035] The sensor mounting portion 22 shown in Figures 3(a) and (b) is a portion where the sensor S is mounted. The sensor mounting portion 22 is formed to extend downward from the lower end of the main body portion 21 (more specifically, the rear portion of the lower end). The sensor mounting portion 22 is formed in a generally plate shape with the plate surface facing in the front-to-rear direction. As shown in Figure 3(a), the upper part of the sensor S is fixed to the front surface of the sensor mounting portion 22. The sensor S is fixed to the sensor mounting portion 22 using an appropriate fastener.

[0036] The upper part 23 constitutes the upper portion of the sensor holder 20. The upper part 23 is formed in a shape (substantially disk-shaped) that is larger in diameter than the main body part 21. The outer diameter of the upper part 23 is formed to be approximately the same as the outer diameter of the upper part 12 of the sensor mount 10. The upper part 23 is detachably fixed to the upper part 12 using an appropriate fastener.

[0037] The second through-hole 24 passes vertically through the sensor holder 20 (main body 21 and upper portion 23). The second through-hole 24 communicates with the opening 3a of the branch portion 3 (see FIG. 1). By passing a lead wire connected to the sensor S through the second through-hole 24, the lead wire can be taken out to the outside of the sensor holder 20. An appropriate plug can be attached to the second through-hole 24, which can seal off the water in the second through-hole 24 while allowing the lead wire to be taken out.

[0038] The pressure outlet 25 is a hole formed in the upper portion 23 so as to extend in the radial direction (left-right direction). More specifically, the pressure outlet 25 is formed so as to extend from the right surface of the upper portion 23 to the second through hole 24. The pressure outlet 25 communicates with the second through hole 24. An appropriate pressure sensor (not shown) can be attached to the pressure outlet 25. This makes it possible to obtain the pressure inside the water pipe 2 via the pressure outlet 25 and the second through hole 24. Furthermore, if the pressure sensor is not attached to the pressure outlet 25, an appropriate plug that can stop water from flowing through the pressure outlet 25 can be attached instead of the pressure sensor.

[0039] The sensor mount 10 and the sensor holder 20 as described above are installed at each of the multiple branch sections 3 formed in the water pipe 2. This allows the sensor S to acquire flow velocity at multiple locations in the water pipe 2.

[0040] As shown in Figure 1, when the sensor holder 20 (main body 21 and sensor attachment portion 22) is attached to the sensor mount 10 so as to pass through the opening 3a and the first through-hole 14, it becomes possible to obtain the water flow velocity in the water pipe 2 using the sensor S. The following describes how to attach the sensor holder 20. In the following description, it is assumed that the plug 16b shown in Figure 2(a) is attached to the horizontal hole 15 of the sensor mount 10.

[0041] First, the main body 21 of the sensor holder 20, to which the sensor S is attached, is inserted into the first through-hole 14 of the sensor mount 10. The upper part 23 of the sensor holder 20 abuts against the upper part 12 of the sensor mount 10, restricting downward movement of the sensor holder 20. In this state, as shown in FIG. 7 , the sensor attachment part 22 at the tip of the main body 21 passes through the opening 3a of the branch part 3. The sensor S attached to the sensor attachment part 22 is located inside the water pipe 2.

[0042] The sensor S acquires the water flow velocity by receiving the pressure of the water in the water pipe 2. The result acquired by the sensor S can be transmitted to an external device (such as an external server) by an appropriate communication device connected to a lead wire.

[0043] The first through-hole 14 of the sensor mount 10 is waterproofed, thereby preventing leakage of water flowing through the water pipe 2. Specifically, the gap between the side surface of the main body 21 of the sensor holder 20 and the inner surface of the opening 3a is filled with an O-ring 21b, thereby waterproofing the first through-hole 14 (see FIG. 7).

[0044] Here, when replacing or inspecting the sensor S, it is necessary to remove the sensor holder 20 from the sensor mount 10. At this time, the main body 21 of the sensor holder 20 is pulled out of the first through hole 14 of the sensor mount 10, and the watertightness of the first through hole 14 by the O-ring 21b is released. For this reason, when replacing or inspecting the sensor S without interrupting the water supply, it is necessary to seal the watertightness of the first through hole 14 by another method.

[0045] In this embodiment, the waterproof pin 100 is used to stop water from entering when the sensor holder 20 is removed from the sensor mount 10. The configuration of the waterproof pin 100 will be described in detail below.

[0046] The water stop pin 100 shown in Figures 1 and 4 to 6 is detachably attached to the sensor mount 10 and is capable of watertightly sealing the first through hole 14. The water stop pin 100 is attached to the horizontal hole portion 15 in place of the plug 16b. The water stop pin 100 has an attachment portion 200 and an advance / retreat portion 300.

[0047] 1, 4, and 5(a) is a portion that is attached to the sensor mount 10. The attachment portion 200 is formed in a generally cylindrical shape that is long in the left-right direction. The attachment portion 200 includes a fitting portion 210 and a third through hole 220.

[0048] The fitting portion 210 shown in Figures 4 and 5(a) is a portion that fits into the first portion 16 of the lateral hole portion 15. The fitting portion 210 constitutes the right portion of the attachment portion 200. The fitting portion 210 is formed in a tapered shape that narrows toward the tip, corresponding to the shape of the first portion 16. A male thread portion 211 is formed on the side surface of the fitting portion 210 by thread machining, and fits into the female thread portion 16a of the lateral hole portion 15 (first portion 16).

[0049] The third through hole 220 passes through the mounting portion 200 in the left-right direction. The third through hole 220 communicates with the lateral hole portion 15. The third through hole 220 includes a first portion 221, a second portion 222, and a third portion 223.

[0050] The first portion 221 is a portion that constitutes the left portion of the third through hole 220. An internal thread portion 221a formed by thread processing is formed on the inner surface of the first portion 221. In this embodiment, the first portion 221 is formed so as to extend from the left end of the mounting portion 200 to a position beyond the center of the mounting portion 200 in the left-right direction.

[0051] The second portion 222 is a portion that constitutes a left-right direction middle portion of the third through hole 220. The inner diameter of the second portion 222 is formed to be smaller than the inner diameter of the first portion 221. A groove portion 222a is formed on the inner surface of the second portion 222.

[0052] The groove 222a is a recessed portion on the inner surface of the second portion 222. The groove 222a is formed so as to extend in the circumferential direction of the second portion 222.

[0053] An O-ring 222b is provided in the groove 222a. The O-ring 222b is a ring-shaped member made of a flexible material such as rubber.

[0054] The third portion 223 is a portion that constitutes the right portion of the third through-hole 220. The inner diameter of the third portion 223 is formed to be larger than the inner diameters of the first portion 221 and the second portion 222.

[0055] The advancing / retracting part 300 shown in Figures 4, 5(b), and 6 is capable of advancing and retracting relative to the attachment part 200 and waterproofing the first through-hole 14. The advancing / retracting part 300 is formed in a generally cylindrical shape that is long in the left-right direction. As shown in Figure 4, the advancing / retracting part 300 is inserted into the third through-hole 220 of the fitting part 210 and is capable of advancing and retracting in the left-right direction along the third through-hole 220. The advancing / retracting part 300 includes an operating part 310, a shaft part 320, a first stopper 330, a sliding member 340, and a waterproofing part 350.

[0056] The operating unit 310 is a part that can be operated to move the advancing / retreating unit 300 forward and backward. The operating unit 310 constitutes the left part of the advancing / retreating unit 300. The operating unit 310 is formed in a generally cylindrical shape that penetrates in the left-right direction. As shown in FIG. 4, the operating unit 310 is disposed inside the first part 221. The outer diameter of the operating unit 310 is formed to be larger than the inner diameter of the second part 222. The operating unit 310 includes a male thread portion 311 and a through hole 312.

[0057] The male thread portion 311 is a portion that fits into the female thread portion 221a of the first portion 221. The male thread portion 311 is formed on the side surface of the operation portion 310 by thread machining.

[0058] 5(b) and 6 passes through the operation portion 310 in the left-right direction. The through hole 312 has a fitting hole portion 312a and a reduced diameter portion 312b.

[0059] The fitting hole 312a is a portion that can be fitted with a tool such as a screwdriver or a wrench. The fitting hole 312a forms the left portion of the through-hole 312. The fitting hole 312a is formed in, for example, a hexagonal shape.

[0060] The reduced diameter portion 312b constitutes the right portion of the through-hole 312. The reduced diameter portion 312b is formed so as to have a smaller diameter than the fitting hole portion 312a.

[0061] The shaft portion 320 shown in Figures 4, 5(b), and 6 constitutes the left-right intermediate portion of the advancing / retreating portion 300. The shaft portion 320 is formed in a generally cylindrical shape that is long in the left-right direction. As shown in Figure 4, the shaft portion 320 is arranged so as to pass through the second portion 222 of the third through hole 220. The outer diameter of the shaft portion 320 is formed to be slightly smaller than the inner diameter of the second portion 222. The gap between the side surface of the shaft portion 320 and the inner surface of the second portion 222 is filled with an O-ring 222b. The shaft portion 320 has a first screw hole portion 321 and a second screw hole portion 322.

[0062] 6 is fitted with a first stopper 330, which will be described later. First screw hole 321 is formed to extend rightward from the left end of shaft 320. An internal thread is formed on the inner surface of first screw hole 321 by threading.

[0063] A second stopper 354 of the watertight part 350, which will be described later, is fitted into the second screw hole part 322. The second screw hole part 322 is formed to extend leftward from the right end part of the shaft part 320. An internal thread is formed on the inner surface of the second screw hole part 322 by thread machining.

[0064] The first fastener 330 shown in FIGS. 5(b) and 6 is used to attach the operating portion 310 to the shaft portion 320. Various bolts (screws) can be used as the first fastener 330. The first fastener 330 has a head portion 331 and a threaded portion 332 having a male thread. The outer diameter of the head portion 331 is larger than the inner diameter of the reduced diameter portion 312b. The outer diameter of the threaded portion 332 is smaller than the inner diameter of the reduced diameter portion 312b. The threaded portion 332 fits into the first screw hole portion 321 of the shaft portion 320.

[0065] 5(b), the operation unit 310 can be attached to the shaft portion 320 by inserting the threaded portion 332 of the first fastener 330 into the reduced diameter portion 312b and then fitting the threaded portion 332 into the first screw hole portion 321. Here, the operation unit 310 is provided so as to be rotatable relative to the shaft portion 320 around an axis extending in the left-right direction, with the first fastener 330 as the rotation axis. The operation unit 310 is also provided so as to be movable relative to the first fastener 330 along the threaded portion 332 (in the left-right direction).

[0066] Sliding member 340 can reduce friction between operating portion 310 and shaft portion 320. An appropriate washer can be used as sliding member 340. The sliding member 340 is inserted into threaded portion 332 of first stopper 330 so as to be positioned in the gap between operating portion 310 and shaft portion 320.

[0067] The water stop portion 350 shown in Figures 4, 5(b), and 6 is a portion that can stop water from flowing through the first through hole 14. The water stop portion 350 constitutes the right portion of the advancing / retreating portion 300. The water stop portion 350 is provided at the right end of the shaft portion 320. The water stop portion 350 is formed in a generally cylindrical shape that is long in the left-right direction. The water stop portion 350 is disposed inside the second portion 222 of the third through hole 220 and the lateral hole portion 15 (see Figure 8). The water stop portion 350 includes a first compression portion 351, a second compression portion 352, a cylindrical portion 353, and a second stopper 354.

[0068] The first compression portion 351 is a portion that can compress a cylindrical portion 353, which will be described later. The first compression portion 351 is formed in a generally cylindrical shape with a partially enlarged diameter. The first compression portion 351 includes a tubular portion 351a and a plate portion 351b.

[0069] The cylindrical portion 351a is a portion formed in a generally cylindrical shape that is long in the left-right direction.

[0070] Plate portion 351b is a portion at the left end of first compression portion 351 that has a larger diameter than tubular portion 351a. Plate portion 351b is formed in a generally disk shape with the plate surface facing left and right. The outer diameter of plate portion 351b is formed to be slightly smaller than the inner diameter of second portion 17 of lateral hole 15. Alternatively, the outer diameter of plate portion 351b may be formed to be generally the same dimension as the inner diameter of second portion 17.

[0071] The second compression portion 352 is a portion that can compress a cylindrical portion 353 (described later) together with the first compression portion 351. The second compression portion 352 is formed in a generally disk shape with its plate surface facing left and right. The outer diameter of the second compression portion 352 is formed to be approximately the same as the outer diameter of the plate portion 351b. In addition, the outer diameter of the second compression portion 352 is formed to be larger than the inner diameter of the third portion 18 of the lateral hole 15. The second compression portion 352 has a through hole 352a.

[0072] The through-hole 352a is a hole that passes through the second compression section 352 in the left-right direction. The inner diameter of the through-hole 352a is larger than the outer diameter of the tubular section 351a of the first compression section 351. As shown in Fig. 6, the through-hole 352a is formed in a shape that gradually increases in diameter toward the right.

[0073] As shown in FIG. 10, the second compression portion 352 is arranged so as to be movable in the left-right direction relative to the cylindrical portion 351a in a state in which the cylindrical portion 351a is inserted into the through-hole 352a.

[0074] The cylindrical portion 353 is compressed by the first compression portion 351 and the second compression portion 352. The cylindrical portion 353 is made of a flexible material such as rubber. The cylindrical portion 353 is formed in a generally cylindrical shape that is long in the left-right direction. The outer diameter of the cylindrical portion 353 is formed to be smaller than the outer diameters of the plate portion 351b of the first compression portion 351 and the second compression portion 352. The inner diameter of the cylindrical portion 353 is formed to be larger than the outer diameter of the tube portion 351a of the first compression portion 351.

[0075] 5, the cylindrical portion 353 is inserted into the tubular portion 351a so as to be sandwiched between the plate portion 351b of the first compression portion 351 and the second compression portion 352. The cylindrical portion 353, the plate portion 351b, and the second compression portion 352 can be fixed to one another by, for example, an adhesive or the like.

[0076] The second fastener 354 is used to attach the first compression portion 351, the second compression portion 352, and the cylindrical portion 353 to the shaft portion 320. Various bolts (screws) can be used as the second fastener 354. In this embodiment, a flat head screw is used as the second fastener 354.

[0077] The second fastener 354 has a head 354a and a threaded portion 354b having a male thread formed thereon. The head 354a is formed with a shape that gradually increases in diameter toward the right to correspond to the through hole 352a of the second compression portion 352. The threaded portion 354b fits into the second screw hole portion 322 of the shaft portion 320. The outer diameter of the threaded portion 354b is formed smaller than the inner diameter of the tubular portion 351a of the first compression portion 351.

[0078] 5 and 6, the water stopper 350 can be attached to the shaft 320 by inserting the threaded portion 354b of the second stopper 354 through the second compression portion 352 and the first compression portion 351 to which the cylindrical portion 353 is attached, and then fitting the threaded portion 332 into the second screw hole 322. As shown in Fig. 5, the second stopper 354 is fixed so as to protrude rightward from the shaft 320. Here, the water stopper 350 is provided so as to be rotatable relatively around an axis extending in the left-right direction with respect to the shaft 320, with the second stopper 354 as the rotation axis.

[0079] 10, when the second compression portion 352 is inserted into the tubular portion 351a (second stopper 354) and moves relatively leftward, the cylindrical portion 353 is sandwiched between the second compression portion 352 and the plate portion 351b and compressed. The compressed cylindrical portion 353 expands in the radial direction.

[0080] When the cylindrical portion 353 is compressed, the tip (head 354a) of the second stopper 354 protrudes to the right from the second compressed portion 352. When the cylindrical portion 353 is not compressed, the tip (head 354a) of the second stopper 354 does not protrude to the right from the second compressed portion 352 (see FIG. 4). More specifically, when the cylindrical portion 353 is not compressed (when the second compressed portion 352 is not in contact with the stepped portion 19, as will be described later), the tip surface of the second stopper 354 is located approximately flush with the right surface of the second compressed portion 352 or is located to the left of the right surface of the second compressed portion 352.

[0081] The water stop pin 100 described above can advance and retreat the advancing and retreating portion 300 relative to the attachment portion 200 by operating the operating portion 310. That is, the operating portion 310 and the third through-hole 220 (first portion 221) are engaged with each other by threads (external thread portion 311 and internal thread portion 221a). Therefore, as shown in FIGS. 9 and 10 , by rotating (threading) the operating portion 310 in a predetermined direction, the advancing and retreating portion 300 (operating portion 310) can be moved (advanced) to the right along the third through-hole 220. Specifically, as the operating portion 310 rotates in the predetermined direction, it moves rightward so as to push the shaft portion 320 rightward via the sliding member 340. In this way, the other portions constituting the advancing and retreating portion 300 (shaft portion 320, first stopper 330, sliding member 340, and water stop portion 350) move rightward together with the operating portion 310. The operating portion 310 can be rotated using an appropriate tool.

[0082] Furthermore, when the operating unit 310 is rotated in the direction opposite to the predetermined direction, the advancing / retreating unit 300 moves leftward (retracts) along the mounting unit 200. Specifically, as the operating unit 310 rotates in the opposite direction, it moves leftward along the threaded portion 332 until it abuts against the head 331. After abutting against the head 331, the operating unit 310 moves leftward, pushing the head 331 leftward. In this manner, the other components of the advancing / retreating unit 300 move leftward together with the operating unit 310. FIG. 4 shows an example in which the advancing / retreating unit 300 has been moved to the left to the maximum extent. In this state, the left portion of the water stop unit 350 is housed within the third portion 223 of the mounting unit 200.

[0083] In this embodiment, the operating part 310 is provided rotatably relative to the shaft part 320, and a sliding member 340 is provided between the operating part 310 and the shaft part 320. This allows the advancing and retreating part 300 to advance and retreat along the third through hole 220 without causing the shaft part 320 to rotate together with the rotation of the operating part 310, thereby preventing damage to the O-ring 222b and the first stopper 330 from falling off the shaft part 320 due to the rotation together.

[0084] Furthermore, in this embodiment, the water stop part 350 is provided so as to be rotatable relative to the shaft part 320. This allows the advancing / retreating part 300 to advance and retreat along the third through-hole 220 without causing the water stop part 350 to rotate together with the rotation of the operating part 310, thereby preventing damage to the cylindrical part 353 and preventing the second stopper 354 from falling off the shaft part 320 due to the rotation together.

[0085] Furthermore, in this embodiment, the outer diameter of cylindrical portion 353 is formed to be smaller than the outer diameters of plate portion 351b of first compression portion 351 and second compression portion 352. As a result, when advancing / retracting portion 300 advances / retreats relative to lateral hole 15, plate portion 351b and second compression portion 352 function as a guide that can slide relative to second portion 17, preventing cylindrical portion 353 from coming into contact with and being damaged by second portion 17. Note that, instead of the above example, the outer diameter of cylindrical portion 353 may be formed to be approximately the same as the outer diameters of plate portion 351b and second compression portion 352.

[0086] Hereinafter, with reference to FIG. 1 and FIGS. 7 to 10, a description will be given of how the water stop pin 100 performs water stop when the sensor holder 20 is removed from the sensor mount 10. FIG.

[0087] When performing water blocking using the water stop pin 100, the worker attaches the water stop pin 100 to the sensor mount 10. Figure 7 shows the state before the water stop pin 100 is attached to the sensor mount 10. In this state, a plug 16b is attached to the horizontal hole portion 15 of the sensor mount 10.

[0088] When attaching the waterproof pin 100 to the sensor mount 10, the worker removes the plug 16b from the lateral hole portion 15. Next, the worker attaches the waterproof pin 100 to the lateral hole portion 15, as shown in FIG.

[0089] Specifically, the worker rotates the entire water stop pin 100 to fit (screw) the fitting portion 210 of the mounting portion 200 into the first portion 16 of the horizontal hole portion 15. Because the first portion 16 and the fitting portion 210 are tapered, once the water stop pin 100 is screwed in to a certain extent, the water stop pin 100 is restricted from moving to the right.

[0090] In the state shown in Figure 8, the gap between the mounting portion 200 (fitting portion 210) and the lateral hole portion 15 (first portion 16) is waterproof. In addition, the gap between the mounting portion 200 (second portion 222) and the advancing / retracting portion 300 (shaft portion 320) is filled with O-ring 222b, so the gap between the mounting portion 200 and the advancing / retracting portion 300 is waterproof (see Figure 4). In this way, with the waterstop pin 100 attached, the lateral hole portion 15 is waterproof.

[0091] At this time, the water stop pin 100 has the advancing / retreating portion 300 moved leftward relative to the attachment portion 200. In this manner, when the advancing / retreating portion 300 is moved leftward, the advancing / retreating portion 300 (water stop portion 350) does not overlap with the first through hole 14 in a plan view, and is positioned in a position where it cannot stop water in the first through hole 14 (water stop release position).

[0092] Next, as shown in Fig. 8, the worker lifts the sensor holder 20 up relative to the sensor mount 10 along the first through-hole 14. When the lower O-ring 21b is positioned inside the horizontal hole 15 as the sensor holder 20 is lifted, the watertight effect provided by the lower O-ring 21b is released. In this case, however, the watertight effect between the main body 21 and the first through-hole 14 is provided by the upper O-ring 21b (see Fig. 1).

[0093] The worker pulls up the sensor holder 20 to a position where the sensor S attached to the sensor holder 20 does not overlap the horizontal hole 15 when viewed from the front. Note that in this state, the sensor holder 20 is not removed from the sensor mount 10, and the watertight seal between the main body 21 of the sensor holder 20 and the first through-hole 14 (watertight seal provided by the O-ring 21b) is not released.

[0094] When the sensor holder 20 is pulled up, water from the water pipe 2 flows into the horizontal hole 15, but since the horizontal hole 15 is sealed off by the water stop pin 100, water leakage from the sensor mount 10 is prevented.

[0095] Next, as shown in Figure 9, the worker rotates operating unit 310 in a predetermined direction, thereby moving advancing / retreating unit 300 to the right relative to mounting unit 200. Figure 9 shows a state in which second compression portion 352 of advancing / retreating unit 300 (water stop unit 350) abuts against step portion 19 of lateral hole 15. In this state, water stop unit 350 is located in second portion 17 so as to cross first through hole 14.

[0096] 10 , the worker operates the operating unit 310 to move the advancing / retreating unit 300 further to the right relative to the attachment unit 200. As the advancing / retreating unit 300 moves further to the right, the cylindrical unit 353 is sandwiched and compressed between the first compression unit 351 and the second compression unit 352. In this state, the advancing / retreating unit 300 (water-stopping unit 350) overlaps with the first through-hole 14 in a plan view, and is located at a position where it can stop water from passing through the first through-hole 14 (water-stopping position).

[0097] 10 , second compression portion 352 abutting against step portion 19 is restricted from moving to the right. Meanwhile, the portion of advancing / retreating portion 300 excluding second compression portion 352 moves to the right as operating portion 310 rotates. At this time, tubular portion 351 a of first compression portion 351 and the tip of second stopper 354 are housed within third portion 18 of lateral hole 15.

[0098] As advancing / retreating section 300 moves rightward, cylindrical section 353 is pressed against plate section 351b of first compression section 351 and second compression section 352, thereby being compressed. As shown in Fig. 10 , compressed cylindrical section 353 expands radially and closes first through hole 14 and lateral hole 15 at the intersection of first through hole 14 and lateral hole 15. This allows first through hole 14 to be waterproofed.

[0099] Next, the worker pulls out the sensor holder 20 from the sensor mount 10. This allows the sensor S to be replaced or inspected. After the replacement or inspection of the sensor S is complete, the worker inserts the sensor holder 20 into the first through-hole 14 of the sensor mount 10. At this time, the sensor holder 20 is pushed down to the extent that the sensor S does not hit the water stop pin 100 (see FIG. 10).

[0100] Next, the operator rotates the operating unit 310 in the direction opposite to the predetermined direction, thereby moving the advancing / retreating unit 300 leftward. As the advancing / retreating unit 300 moves leftward, the second compression unit 352 moves relative to the tubular unit 351a (second stopper 354) of the first compression unit 351. This releases the compression of the cylindrical unit 353 (see FIGS. 9 and 10). In this state, the waterproofing of the first through-hole 14 by the water-stopping unit 350 is released.

[0101] As the advancing / retreating part 300 moves further leftward, the advancing / retreating part 300 (water stop part 350) is positioned in the water stop release position (see FIG. 8). Next, the operator presses the sensor holder 20 completely down against the sensor mount 10 (see FIG. 7). In this state, the sensor holder 20 stops water from entering the first through-hole 14.

[0102] Next, the worker rotates the entire water stop pin 100 to remove the water stop pin 100 (mounting portion 200) from the lateral hole portion 15. Also, the worker attaches the plug 16b to the lateral hole portion 15 (see FIG. 7). In this way, the sensor S can be replaced or inspected without interrupting the water supply.

[0103] As described above, in this embodiment, the advance / retreat portion 300 of the water stop pin 100 can be displaced along the horizontal hole portion 15 so as to move between a water stop position and a water stop release position, thereby making it possible to perform water stop in the first through hole 14.

[0104] Furthermore, the water stop pin 100 is detachable from the sensor mount 10. Therefore, when the sensor mount 10, sensor holder 20, and sensor S are installed at multiple locations on the water pipe 2, the common water stop pin 100 can be reused to stop water flow at multiple locations for attaching and detaching the sensor S. This simplifies the configuration of the installation location of the sensor S and reduces costs.

[0105] As described above, the sensor mounting jig 1 according to this embodiment has the following features: A sensor mounting jig 1 capable of mounting a sensor S for acquiring information about the inside of a pipeline (water pipe 2) through which a fluid flows, a sensor mount (10) having a first through hole (14) communicating with an opening (3a) formed in the pipeline (water pipe (2)) and a hole (horizontal hole (15)) communicating with the first through hole (14) so ​​as to intersect with the first through hole (14); a sensor holder (20) provided on the sensor mount (10) so as to pass through the opening and the first through-hole (14), and to which the sensor is attached; a water stop pin (100) that is detachably attached to the sensor mount (10) and that is positioned within the hole (lateral hole portion (15)) so as to cross the first through hole (14) to stop the fluid; It is equipped with the following. With this configuration, the common water stop pin 100 can be reused to stop water flow when attaching or detaching the sensor S. That is, when the sensor holder 20 inserted into the first through hole 14 of the sensor mount 10 is pulled out and reinserted for replacement or inspection of the sensor S, the water stop pin 100 can be attached to the sensor mount 10 to stop water flow, allowing the above work to be performed without stopping the water supply. Because the water stop pin 100 is detachable from the sensor mount 10, when sensors S are installed at multiple locations in the pipeline (water pipe 2), the common water stop pin 100 can be reused to stop water flow when attaching or detaching the sensors S at multiple locations. This can simplify the configuration of the installation location of the sensor S and reduce costs.

[0106] The sensor holder 20 is The sensor holder 20 has a second through hole 24 formed along the insertion direction thereof. With this configuration, it is possible to take out the wiring (lead wire) connected to the sensor S through the second through-hole 24 and to acquire the pressure inside the pipe (water pipe 2).

[0107] The waterproof pin 100 is The nozzle is provided so as to be able to advance and retreat along the hole (horizontal hole 15) so as to be displaced between a position where the fluid can be stopped and a position where the fluid cannot be stopped. With this configuration, by moving the water stop pin 100 back and forth, it is possible to switch between stopping water with the water stop pin 100 and releasing the water stop.

[0108] The waterproof pin 100 is a mounting portion 200 attached to the sensor mount 10; an advancing / retreating unit (300) having a shaft (320) provided with a water stopping unit (350) capable of stopping the flow of the fluid, and an operating unit (310) capable of operating to advance / retreat the shaft (320) relative to the mounting unit (200); It is equipped with the following. With this configuration, water can be stopped favorably by advancing and retracting the advancing and retracting unit 300 relative to the mounting unit 200. That is, after mounting unit 200 is attached to sensor mount 10 and water stop pin 100 is positioned relative to sensor mount 10, advancing and retracting unit 300 can be moved forward and backward relative to mounting unit 200. This facilitates the operation to stop water from entering first through hole 14. Furthermore, when stopping water from entering first through hole 14, the operation to stop water from entering first through hole 14 can be performed with the connection between mounting unit 200 and sensor mount 10 kept watertight.

[0109] In addition, the waterproof portion 350 is The retractable portion 300 is provided so as to be rotatable relative to the shaft portion 320 around an axis along the retractable direction of the retractable portion 300 . This configuration can reduce wear and damage to water stop portion 350. That is, for example, when advancing / retreating portion 300 is inserted into hole portion (lateral hole portion 15), even if shaft portion 320 rotates about its axis, water stop portion 350 can be prevented from rotating together with the shaft portion 320. This can reduce wear and damage caused by water stop portion 350 rotating together and sliding against the inner surface of hole portion (lateral hole portion 15).

[0110] In addition, the operation unit 310 includes: The moving unit 300 is provided to be rotatable relative to the shaft unit 320 around an axis along the moving direction of the moving unit 300, Between the operating portion 310 and the shaft portion 320, a sliding member 340 is provided to reduce friction between the operating portion 310 and the shaft portion 320. This configuration can reduce wear and damage to shaft portion 320 and water stop portion 350. That is, for example, even when operating portion 310 is rotated about its axis when advancing / retreating portion 300 is inserted into hole portion (lateral hole portion 15), shaft portion 320 and water stop portion 350 can be prevented from rotating together. This can reduce wear and damage caused by shaft portion 320 and water stop portion 350 rotating together sliding against the inner surface of hole portion (lateral hole portion 15).

[0111] Furthermore, in this embodiment, by suppressing the co-rotation of the shaft portion 320, it is possible to suppress wear and damage to the O-ring 222b that fills the gap between the side surface of the shaft portion 320 and the inner surface of the second portion 222 of the third through hole 220 due to the rotation of the shaft portion 320.

[0112] In addition, the mounting portion 200 is a third through-hole 220 that penetrates the advancing / retreating portion 300 in the advancing / retreating direction and has a female screw portion 221a formed therein; The operation unit 310 is a male thread portion (311) that is disposed inside the third through hole (220) and that fits into the female thread portion (221a); The advancing and retreating unit 300 is By rotating the operating portion 310 relative to the mounting portion 200, the operating portion 310 advances and retreats along the hole portion (lateral hole portion 15). This configuration allows suitable advancement and retreat of the advancing and retreating unit 300. That is, by rotating the operation unit 310 like turning a screw, the advancing and retreating unit 300 can be advanced and retreated with a relatively small force.

[0113] In addition, the waterproof portion 350 is a cylindrical portion 353 formed in a cylindrical shape and having flexibility; a compression mechanism (a first compression portion 351, a second compression portion 352, and a second stopper 354) that compresses the cylindrical portion 353 as the advancing / retracting portion 300 moves toward one side in the advancing / retracting direction; Equipped with The cylindrical portion 353 is When compressed by the compression mechanism (first compression section 351, second compression section 352, and second stopper 354), the fluid expands in the radial direction at a position where the fluid can be stopped from flowing. With this configuration, by compressing the cylindrical portion 353, water can be effectively stopped.

[0114] Further, the compression mechanism includes: a protruding portion (second stopper 354) that protrudes from the shaft portion 320 toward one side in the advance / retreat direction and that passes through the cylindrical portion 353; a pressing portion (second stopper 354) that is inserted into the protruding portion (second stopper 354) so ​​as to be positioned on one side of the cylindrical portion 353 in the advancing / retracting direction, and that compresses the cylindrical portion 353 by moving relatively to the protruding portion (second stopper 354) as the advancing / retracting portion 300 moves toward the one side in the advancing / retracting direction; Equipped with The protruding portion (second stopper 354) is When the cylindrical portion 353 is not compressed, the tip does not protrude beyond the pressing portion (second stopper 354) toward one side in the advancing / retracting direction. With this configuration, when the sensor holder 20 is inserted into the first through-hole 14, interference between the sensor S and the sensor holder 20 and the protruding portion (second stopper 354) can be suppressed.

[0115] The water pipe 2 according to this embodiment is one embodiment of a pipeline according to the present invention. The lateral hole 15 according to this embodiment is one embodiment of the hole according to the present invention. The first compression portion 351, the second compression portion 352 and the second stopper 354 according to this embodiment are one embodiment of the compression mechanism according to the present invention. The second fastener 354 according to this embodiment is one embodiment of the protrusion according to the present invention.

[0116] Although one embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0117] For example, in this embodiment, an example is shown in which the sensor mounting jig 1 is installed inside a valve box, but the installation target of the sensor mounting jig 1 is not limited to the above example, and it can be applied to various types of equipment such as fire hydrants and valves.

[0118] In addition, in this embodiment, an example is shown in which the sensor mount 10 is attached directly to the branching section 3, but this is not limited to such an embodiment, and for example, the sensor mount 10 may be attached to an appropriate attachment member fixed to the branching section 3.

[0119] In addition, in this embodiment, an example is shown in which the sensor holder 20 is provided with a second through hole 24 and a pressure outlet 25, but this is not limited to this form, and the sensor holder 20 does not necessarily need to be provided with the second through hole 24 or the pressure outlet 25.

[0120] In addition, in this embodiment, an example has been shown in which the mounting portion 200 is attached to the sensor mount 10 by fitting the male thread portion 211 of the mounting portion 200 (fitting portion 210) into the female thread portion 16a of the horizontal hole portion 15, but this is not a limitation. Various modes of attachment of the mounting portion 200 to the sensor mount 10 can be used, for example, an appropriate waterproof connector, etc. Furthermore, various modes of attachment of the mounting portion 200 can be used, regardless of whether or not a waterproof means is used.

[0121] In addition, in the present embodiment, an example has been shown in which lateral hole portion 15 is formed so as to be perpendicular to first through hole 14, but this is not limited to such an example. Various angles can be adopted as the angle of lateral hole portion 15 relative to first through hole 14.

[0122] In addition, in the present embodiment, the water stop pin 100 is configured such that the advancing / retreating part 300 advances and retreats relative to the mounting part 200 by screwing the operating part 310, but the present invention is not limited to this configuration. For example, instead of the above configuration, a configuration in which the advancing / retreating part 300 slides relative to the mounting part 200 can be adopted. In this case, the advancing / retreating part 300 may be slid using various actuators.

[0123] In addition, in the present embodiment, an example has been shown in which the operation unit 310 and the water stop unit 350 are provided so as to be rotatable relative to the shaft unit 320 around the axis, but this is not limiting. For example, one or both of the operation unit 310 and the water stop unit 350 may be provided so as not to be rotatable relative to the shaft unit 320.

[0124] Furthermore, in this embodiment, the attachment portion 200 and the advancing / retracting portion 300 of the water stop pin 100 are separate members, but this is not limited to this. For example, the water stop pin 100 may be configured such that the portion that is attached to the sensor mount 10 and the portion that performs the water stop are integrally formed. In this case, for example, a configuration can be adopted in which the water stop pin 100 is advanced and retracted relative to the lateral hole 15 by screwing the water stop pin 100 into the sensor mount 10.

[0125] In addition, in this embodiment, the sensor S is configured by providing a strain gauge on the surface of a plate-shaped member, but is not limited to this. The sensor S can have any configuration.

[0126] In addition, in this embodiment, the sensor S acquires the flow velocity of water in the water pipe 2, but is not limited to this. The information acquired by the sensor S can be various types of information about the inside of the pipe, such as pressure, temperature, vibration, images (video), and the flow direction of the fluid in the pipe.

[0127] Furthermore, in this embodiment, an example has been shown in which the sensor mounting jig 1 is installed on the water pipe 2, but the present invention is not limited to this. The sensor mounting jig 1 can be installed in various types of pipelines through which fluids flow. [Explanation of symbols]

[0128] 1 Sensor mounting jig 10 Sensor Mount 20 Sensor holder 100 Water Stop Pin

Claims

1. A sensor mounting jig capable of mounting a flow velocity sensor for acquiring flow velocity information in a pipeline through which a fluid flows, a sensor mount having a first through hole communicating with an opening formed in the conduit; a sensor holder provided on the sensor mount so as to pass through the opening and the first through-hole, the sensor holder having the flow velocity sensor attached thereto; and The sensor mount and the sensor holder are each having a contact surface that is perpendicular to the insertion direction of the sensor holder; the contact surface of the sensor mount and the contact surface of the sensor holder are configured to be in surface contact with each other when the sensor mount and the sensor holder are fixed to each other; The sensor holder includes: The portion where the contact surface is formed and the portion where the flow velocity sensor is attached are integrally formed. Sensor mounting jig.

2. The flow velocity sensor acquiring the flow velocity information using a strain gauge; The sensor mounting jig according to claim 1 .

Images