Sensor attachment 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 technique 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 obtain information about the inside of a pipeline. For example, Patent Document 1 discloses a non-stop water 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 through flange that closes the investigation hole, and a gate valve provided below the through flange. An investigation rod can be inserted into the through flange while maintaining watertightness. In this configuration, the investigation inside the pipeline can be carried out without stopping the water supply by inserting the investigation rod into the through flange and fully opening the gate valve. 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 water blocking is interposed between the through flange and the inspection rod, and the inspection rod inserted into the through flange is fixed to the through 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 be tilted relative to the through 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 consideration of the above circumstances, and an object of the present invention is to provide a sensor mounting jig that can regulate the 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 has been described above, and the means for solving this problem will now be described.

[0008] That is, in claim 1, a sensor mounting tool capable of mounting a flow velocity sensor that acquires flow velocity information within 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 on 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 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.

[0009] In claim 2, the flow velocity sensor obtains the flow velocity information by a strain gauge. Effect of the Invention

[0010] The present invention has the following advantages.

[0011] In claim 1, the 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 description of the drawings]

[0013] [Figure 1]FIG. [Diagram 2] (a) is a front cross-sectional view showing the sensor mount, (b) is a plan view showing the sensor mount. [Diagram 3] 1A is a front cross-sectional view showing the sensor holder, FIG. 1B is a side cross-sectional view showing a lower part of the sensor holder, and FIG. [Figure 4] FIG. [Diagram 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. 13 is a front cross-sectional view showing how a water stop pin is attached to the sensor mount. [Figure 8] 13 is a front cross-sectional view showing a state in which the sensor holder inserted into the sensor mount is pulled up. FIG. [Figure 9] FIG. 13 is a front cross-sectional view showing the advance / retract part entering the lateral hole part. [Figure 10] FIG. 4 is a front cross-sectional view showing how water is stopped by the water stopping portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] In the following description, the directions indicated by the 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 the sake of convenience. 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 attachment jig 1 is used to attach 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 through a water pipe 2 (pipe). In the following, 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 in the middle of the water pipe 2. The branch sections 3 are formed at multiple points on the water pipe 2. The branch sections 3 are formed with openings 3a that communicate with the inside 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, a strain gauge is provided on the surface (front and rear) 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 water pressure with the strain gauge (see FIG. 3(b)). Appropriate lead wires are connected to the strain gauge.

[0019] Next, the detailed configuration of the sensor mounting jig 1 will be described with reference to Fig. 1 to Fig. 6. As shown in Fig. 1, the sensor mounting jig 1 is attached to a branching section 3, and a sensor S is positioned 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 upper and lower ends each having an enlarged diameter. The sensor mount 10 has a central portion 11, an upper portion 12, a lower portion 13, a first through hole 14, and a lateral hole portion 15.

[0021] 2 constitutes the vertical center portion of the sensor mount 10. The central portion 11 is formed into 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 that is larger in diameter than the central portion 11 (approximately a disk shape).

[0023] The lower portion 13 constitutes the lower end portion of the sensor mount 10. The lower portion 13 is formed to have a shape with 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 vertically penetrates 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 have approximately the same dimension as the inner diameter of the opening 3a. The first through hole 14 is disposed 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 portion 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 portion 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 portion 15 communicates with the first through hole 14 so as to intersect with the first through hole 14. In this embodiment, the lateral hole portion 15 is formed so as to be perpendicular to the first through hole 14. The lateral hole portion 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 lateral hole portion 15. The inner surface of the first portion 16 is formed with a female thread portion 16a formed 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. When the plug 16b is attached, the first portion 16 is watertight.

[0028] The second portion 17 constitutes the left-right center portion 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 thereto. The second portion 17 overlaps with the first through hole 14 in a plan view.

[0029] The third portion 18 constitutes the right portion of the lateral hole portion 15. The inner diameter of the third portion 18 is smaller than the inner diameter of the second portion 17. The third portion 18 is located to the right of the 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 leftward) perpendicular to the second portion 17 and the third portion 18. Note that instead of the above embodiment, for example, the step portion 19 may be formed 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 upper 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 long 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 vertically spaced apart in the lower portion of the main body portion 21. The lower groove portion 21a of the pair of groove portions 21a is formed in the lower end portion of the main body portion 21.

[0034] The O-ring 21b is a ring-shaped member that fills the gap 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 to which the sensor S is attached. The sensor mounting portion 22 is formed so as to extend downward from the lower end of the main body portion 21 (more specifically, the rear portion at the lower end). The sensor mounting portion 22 is formed in a generally plate shape with the plate surface facing in the front-rear direction. As shown in Figure 3(a), the upper portion 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 portion 23 constitutes the upper portion of the sensor holder 20. The upper portion 23 is formed in a shape (substantially disk-shaped) that is larger in diameter than the main body portion 21. The outer diameter of the upper portion 23 is formed to be approximately the same as the outer diameter of the upper portion 12 of the sensor mount 10. The upper portion 23 is detachably fixed to the upper portion 12 using an appropriate fastener.

[0037] The second through hole 24 vertically passes 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 to stop water from entering 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, in cases where the pressure sensor is not attached to the pressure outlet 25, an appropriate plug capable of stopping water from entering 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 branching sections 3 formed in the water pipe 2. This allows the flow velocity to be obtained by the sensor S at multiple points in the water pipe 2.

[0040] As shown in Fig. 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 for the sensor S to obtain the flow velocity of water in the water pipe 2. The following describes how to attach the sensor holder 20. Note that in the following description, it is assumed that a plug 16b shown in Fig. 2(a) is attached to the lateral 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 downward movement of the sensor holder 20 is restricted by the contact of the upper part 23 with the upper part 12 of the sensor mount 10. In this state, the sensor attachment part 22 at the tip of the main body 21 passes through the opening 3a of the branch part 3, as shown in FIG. 7. 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 water pressure 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] Since the first through hole 14 of the sensor mount 10 is waterproofed, leakage of water flowing through the water pipe 2 is suppressed. 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 cutting off the water supply, it is necessary to use another method to seal the watertightness of the first through hole 14.

[0045] In this embodiment, the waterproof pin 100 is used to make it possible 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] 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 watertight pin 100 is attached to the lateral hole portion 15 in place of the plug 16b. The watertight pin 100 includes an attachment portion 200 and an advance / retract portion 300.

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

[0048] 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 tapers toward the tip corresponding to the shape of the first portion 16. A male thread portion 211 is formed by thread machining on the side surface of the fitting portion 210, and fits into the female thread portion 16a of the lateral hole portion 15 (first portion 16).

[0049] The third through hole 220 penetrates the attachment 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 portion 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 constitutes a left-right direction middle portion of the third through hole 220. The inner diameter of the second portion 222 is 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 portion 222a is a recessed portion on the inner surface of the second portion 222. The groove portion 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 constitutes the right portion of the third through hole 220. The inner diameter of the third portion 223 is larger than the inner diameters of the first portion 221 and the second portion 222.

[0055] The advancing / retreating part 300 shown in Figs. 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 / retreating part 300 is formed in a generally cylindrical shape that is long in the left-right direction. As shown in Fig. 4, the advancing / retreating 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 / retreating 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 portion 310 is a portion that can be operated to advance and retreat the advancing and retreating portion 300. The operating portion 310 constitutes the left portion of the advancing and retreating portion 300. The operating portion 310 is formed in a generally cylindrical shape that penetrates in the left-right direction. As shown in FIG. 4, the operating portion 310 is disposed inside the first portion 221. The outer diameter of the operating portion 310 is formed to be larger than the inner diameter of the second portion 222. The operating portion 310 includes a male thread portion 311 and a through hole 312.

[0057] The male thread portion 311 is a portion that fits with 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 processing.

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

[0059] The fitting hole 312a is a portion into which a tool such as a screwdriver or a wrench can be fitted. The fitting hole 312a constitutes 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 Figs. 4, 5(b) and 6 constitutes a left-right intermediate portion of the advance / retract portion 300. The shaft portion 320 is formed in a generally cylindrical shape that is long in the left-right direction. As shown in Fig. 4, the shaft portion 320 is disposed 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 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 by an O-ring 222b. The shaft portion 320 includes a first screw hole portion 321 and a second screw hole portion 322.

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

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

[0064] The first fastener 330 shown in Figs. 5(b) and 6 is for attaching 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 formed to be larger than the inner diameter of the reduced diameter portion 312b. The outer diameter of the threaded portion 332 is formed to be 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), in a state where the threaded portion 332 of the first stopper 330 is inserted into the reduced diameter portion 312b, the threaded portion 332 is fitted into the first screw hole portion 321, thereby making it possible to attach the operation unit 310 to the shaft portion 320. Here, the operation unit 310 is provided so as to be rotatable relatively around an axis along the left-right direction with respect to the shaft portion 320, with the first stopper 330 as a rotation axis. In addition, the operation unit 310 is provided so as to be movable relatively to the first stopper 330 along the threaded portion 332 (in the left-right direction).

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

[0067] The water stop portion 350 shown in Figs. 4, 5(b) and 6 is a portion capable of stopping water in the first through hole 14. The water stop portion 350 constitutes the right portion of the advance / retract portion 300. The water stop portion 350 is provided at the right end portion 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 Fig. 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 capable of compressing a cylindrical portion 353, which will be described later. The first compression portion 351 is formed in a generally cylindrical shape with a part having a larger diameter. The first compression portion 351 includes a tube portion 351a and a plate portion 351b.

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

[0070] The plate portion 351b is a portion at the left end of the first compression portion 351 that expands in diameter relative to the tube portion 351a. The plate portion 351b is formed in a substantially disk shape with the plate surface facing in the left-right direction. The outer diameter of the plate portion 351b is formed to be slightly smaller than the inner diameter of the second portion 17 of the lateral hole portion 15. The outer diameter of the plate portion 351b may be formed to be substantially the same dimension as the inner diameter of the second portion 17.

[0071] The second compression portion 352 is a portion capable of compressing a cylindrical portion 353, which will be described later, together with the first compression portion 351. The second compression portion 352 is formed in a substantially disk shape with its plate surface facing in the left-right direction. The outer diameter of the second compression portion 352 is formed to be substantially 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 portion 15. The second compression portion 352 has a through hole 352a.

[0072] The through hole 352a is a hole that penetrates the second compression portion 352 in the left-right direction. The inner diameter of the through hole 352a is larger than the outer diameter of the cylindrical portion 351a of the first compression portion 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 disposed 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 tube 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 for attaching 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 the present embodiment, a countersunk screw is used as the second fastener 354.

[0077] The second stopper 354 has a head 354a and a threaded portion 354b having a male thread formed thereon. The head 354a is formed in a shape that gradually increases in diameter toward the right so as 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 portion 320 by fitting the threaded portion 332 into the second screw hole portion 322 in a state where the threaded portion 354b of the second stopper 354 is inserted through the second compression portion 352 and the first compression portion 351 to which the cylindrical portion 353 is attached. As shown in Fig. 5, the second stopper 354 is fixed so as to protrude rightward from the shaft portion 320. Here, the water stopper 350 is provided so as to be rotatable relatively around an axis along the left-right direction with respect to the shaft portion 320, with the second stopper 354 as the rotation axis.

[0079] 10, when the second compression portion 352 is inserted through the tube 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 described below), the tip surface of the second stopper 354 is located approximately on the same plane as 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 as described above can advance and retreat the advancing and retreating part 300 with respect to the attachment part 200 by performing an operation using the operating part 310. That is, the operating part 310 and the third through hole 220 (first part 221) are engaged with each other by a screw (male screw part 311 and female screw part 221a). Therefore, as shown in Figs. 9 and 10, by rotating (screwing) the operating part 310 in a predetermined direction, the advancing and retreating part 300 (operating part 310) can be moved (advanced) to the right along the third through hole 220. Specifically, the operating part 310 moves to the right as it pushes the shaft part 320 to the right via the sliding member 340 in accordance with the rotation in the predetermined direction. In this way, the other parts (shaft part 320, first stopper 330, sliding member 340, and water stop part 350) constituting the advancing and retreating part 300 move to the right together with the operating part 310. The operation unit 310 can be rotated using an appropriate tool.

[0082] Furthermore, when the operating unit 310 is rotated in a direction opposite to the above-mentioned predetermined direction, the advancing / retreating unit 300 moves (retreats) to the left along the mounting unit 200. Specifically, the operating unit 310 moves to the left along the threaded portion 332 as it rotates in the opposite direction until it abuts against the head 331. After abutting against the head 331, the operating unit 310 moves to the left so as to push the head 331 to the left. In this manner, the other parts constituting the advancing / retreating unit 300 move to the left together with the operating unit 310. FIG. 4 shows an example in which the advancing / retreating unit 300 is moved to the left to the maximum extent. In this state, the left part of the water stopper unit 350 is housed in the third part 223 of the mounting unit 200.

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

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

[0085] In this embodiment, the outer diameter of the cylindrical portion 353 is formed to be smaller than the outer diameters of the plate portion 351b and the second compression portion 352 of the first compression portion 351. As a result, when the advance / retract portion 300 advances / retracts relative to the lateral hole portion 15, the plate portion 351b and the second compression portion 352 function as a guide that can slide relative to the second portion 17, and it is possible to prevent the cylindrical portion 353 from contacting and being damaged by the second portion 17. Note that, instead of the above example, the outer diameter of the cylindrical portion 353 may be formed to be approximately the same as the outer diameters of the plate portion 351b and the second compression portion 352.

[0086] Hereinafter, with reference to FIG. 1 and FIG. 7 to FIG. 10, a manner in which water blocking is performed by the water blocking pin 100 when the sensor holder 20 is removed from the sensor mount 10 will be described.

[0087] When performing water stop using the water stop pin 100, an operator attaches the water stop pin 100 to the sensor mount 10. Fig. 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 lateral 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 attachment portion 200 into the first portion 16 of the lateral hole portion 15. Since the first portion 16 and the fitting portion 210 are tapered, when the water stop pin 100 is screwed in to a certain extent, the movement of the water stop pin 100 to the right is restricted.

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

[0091] At this time, the water stop pin 100 has the advancing / retreating part 300 moved leftward relative to the attachment part 200. In this manner, when the advancing / retreating part 300 is moved leftward, the advancing / retreating part 300 (water stop part 350) does not overlap with the first through hole 14 in a plan view, and is located at 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 up the sensor holder 20 relative to the sensor mount 10 along the first through hole 14. When the lower O-ring 21b is positioned inside the lateral hole 15 as the sensor holder 20 is lifted up, the watertightness provided by the lower O-ring 21b is released; however, in this case, the watertightness 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 with the lateral hole portion 15 in a front view. Note that in this state, the sensor holder 20 is not removed from the sensor mount 10, and the watertightness between the main body portion 21 of the sensor holder 20 and the first through-hole 14 (watertightness provided by the O-ring 21b) is not released.

[0094] As the sensor holder 20 is pulled up, water from the water pipe 2 flows into the lateral hole 15. However, since the lateral hole 15 is watertight by the water stop pin 100, water leakage from the sensor mount 10 is suppressed.

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

[0096] 10, the operator uses 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 the first through hole 14 can stop water (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 advance / retract portion 300 excluding second compression portion 352 moves to the right as operation portion 310 rotates. At this time, tube portion 351a of first compression portion 351 and the tip of second stopper 354 are housed in third portion 18 of lateral hole portion 15.

[0098] As the advancing / retreating portion 300 moves rightward, the cylindrical portion 353 is pressed by the plate portion 351b of the first compression portion 351 and the second compression portion 352, and is compressed. As shown in Fig. 10, the compressed cylindrical portion 353 expands in the radial direction, and closes the first through hole 14 and the lateral hole portion 15 at the portion where the first through hole 14 and the lateral hole portion 15 intersect. This makes it possible to provide a waterproofing effect for the first through hole 14.

[0099] Next, the worker pulls out the sensor holder 20 from the sensor mount 10. This allows replacement or inspection of the sensor S. After completing replacement or inspection of the sensor S, 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 pressed 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 portion 310 in a direction opposite to the predetermined direction, thereby moving the advancing / retreating portion 300 leftward. As the advancing / retreating portion 300 moves leftward, the second compression portion 352 moves relative to the tube portion 351a (second stopper 354) of the first compression portion 351. This releases the compression of the cylindrical portion 353 (see FIGS. 9 and 10). In this state, the water blocking of the first through-hole 14 by the water blocking portion 350 is released.

[0101] As the advancing / retreating part 300 moves further leftward, the advancing / retreating part 300 (water-stopping part 350) is located in the water-stopping 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 flow into the first through-hole 14.

[0102] Next, the worker rotates the entire water stop pin 100 to remove the water stop pin 100 (attachment 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 manner, the sensor S can be replaced or inspected without interrupting the water supply.

[0103] As described above, in this embodiment, water can be stopped in the first through hole 14 by displacing the advance / retract portion 300 of the water stop pin 100 along the lateral hole portion 15 so as to move between a water stopper position and a water stop release position.

[0104] Furthermore, the water stop pin 100 is detachable from the sensor mount 10. Therefore, when the sensor mount 10, the sensor holder 20, and the 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 can simplify the configuration of the installation location of the sensor S and reduce costs.

[0105] As described above, the sensor mounting jig 1 according to this embodiment has the following features: A sensor mounting tool 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 portion (a horizontal hole portion 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 capable of stopping the flow of the fluid by being positioned within the hole portion (lateral hole portion (15)) so as to cross the first through hole (14); 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 or reinserted for replacing or inspecting the sensor S, the water stop pin 100 is attached to the sensor mount 10 to stop water flow, so that the above work can be performed without cutting off the water supply. Since the water stop pin 100 is detachable from the sensor mount 10, when the 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 at multiple locations when the sensors S are installed 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 of the sensor holder 20 . 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 obtain the pressure inside the pipe (water pipe 2).

[0107] In addition, the water stop pin 100 is The stopper is provided so as to be movable back and forth along the hole (lateral 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 blocking water with the water stop pin 100 and releasing the blocking of water.

[0108] In addition, the water stop pin 100 is A mounting portion 200 that is attached to the sensor mount 10; An advance / retract unit 300 having a shaft portion 320 provided with a water stopper portion 350 capable of stopping the flow of the fluid, and an operation portion 310 capable of operating to advance / retract the shaft portion 320 relative to the attachment portion 200; It is equipped with the following. With this configuration, water can be stopped suitably by advancing and retracting the advancing and retracting part 300 relative to the mounting part 200. That is, the mounting part 200 is attached to the sensor mount 10, and the water stop pin 100 is positioned relative to the sensor mount 10, and then the advancing and retracting part 300 can be advanced and retracted relative to the mounting part 200. This makes it easy to perform an operation for water stoppage of the first through hole 14. Furthermore, when water stoppage of the first through hole 14 is performed, the operation for water stoppage of the first through hole 14 can be performed in a state where the connection part between the mounting part 200 and the sensor mount 10 is watertight.

[0109] In addition, the water stopper portion 350 is The moving part 300 is provided so as to be rotatable relatively to the shaft part 320 about an axis along the moving direction of the moving part 300 . This configuration can suppress wear and damage to the water stop part 350. That is, for example, when the advance / retract part 300 is inserted into the hole part (side hole part 15), even if the shaft part 320 rotates about its axis, the water stop part 350 can be prevented from rotating together with the shaft part 320. This can suppress wear and damage caused by the water stop part 350 rotating together sliding against the inner surface of the hole part (side hole part 15).

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

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

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

[0113] In addition, the water stopper 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 in association with the movement of the advancing / retracting portion 300 in one 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. With this configuration, by compressing the cylindrical portion 353, water can be effectively stopped.

[0114] The compression mechanism further comprises: a protruding portion (second stopper 354) protruding from the shaft portion 320 toward one side in the advance / retreat direction and inserted 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) to one side in the forward / backward 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 a hole according to the present invention. Moreover, 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. Moreover, the second fastener 354 according to this embodiment is one embodiment of a 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-mentioned example, and it can be applied to various facilities such as fire hydrants and valves.

[0118] In addition, in this embodiment, an example is shown in which the sensor mount 10 is directly attached to the branching portion 3, but this is not limited to this form. For example, the sensor mount 10 may be attached to an appropriate mounting member fixed to the branching portion 3.

[0119] In addition, in this embodiment, an example is shown in which the second through hole 24 and the pressure outlet 25 are provided in the sensor holder 20, but this is not limited to this form, and the second through hole 24 and the pressure outlet 25 do not have to be provided in the sensor holder 20.

[0120] In addition, in the present embodiment, an example has been shown in which mounting portion 200 is attached to sensor mount 10 by fitting male thread portion 211 of mounting portion 200 (fitting portion 210) into female thread portion 16a of lateral hole portion 15, but the present invention is not limited to such an embodiment. Various embodiments can be used to attach mounting portion 200 to sensor mount 10, such as, for example, a suitable waterproof connector. Various embodiments can be used to attach mounting portion 200, regardless of the presence or absence of a waterproof means.

[0121] In the present embodiment, the lateral hole portion 15 is formed so as to be perpendicular to the first through hole 14, but the present invention is not limited to this. The angle of the lateral hole portion 15 with respect to the first through hole 14 can be various angles.

[0122] In the present embodiment, the water stop pin 100 is configured to advance and retreat the advancing and retreating part 300 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 and retreating part 300 slides relative to the mounting part 200 can be adopted. In this case, the advancing and retreating part 300 may be slid using various actuators.

[0123] In the present embodiment, the operation unit 310 and the water stop unit 350 are provided so as to be rotatable around the axis relative to the shaft unit 320, but the present invention is not limited to this. 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] In addition, in this embodiment, the attachment portion 200 and the advance / retract portion 300 of the water stop pin 100 are separate members, but the present invention is not limited to this. For example, the water stop pin 100 may be configured such that the portion attached to the sensor mount 10 and the portion that stops water are integrally formed. In this case, for example, a configuration can be adopted in which the water stop pin 100 advances and retracts relative to the lateral hole portion 15 by screwing the water stop pin 100 into the sensor mount 10.

[0125] In the present 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 may have any configuration.

[0126] In the present 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] In addition, in this embodiment, an example has been shown in which the sensor mounting jig 1 is mounted on the water pipe 2, but the present invention is not limited to this embodiment. The sensor mounting jig 1 can be mounted on various types of pipelines through which fluid flows. [Explanation of symbols]

[0128] 1 Sensor mounting fixture 10 Sensor Mount 20 Sensor holder 100 Water stop pin

Claims

1. A sensor mounting tool 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 pipeline; 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; having The sensor mount and the sensor holder include Each of the contact surfaces is perpendicular to the insertion direction of the sensor holder. 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 configured to be in surface contact with each other. Sensor mounting fixture.

2. The flow rate sensor includes: acquiring said flow rate information by a strain gauge; The sensor mounting jig according to claim 1 .

Images