Resistance strain sensor device for measuring expansive force of pipeline

Abstract

The utility model discloses a resistance strain sensor device for measuring the expansive force of a pipeline. The resistance strain sensor device comprises a longitudinally arranged pipeline and a resistance strain sensor assembly, the resistance strain sensor assembly comprises a hoop, a plurality of elastic bodies, a plurality of hoop matching blocks and a plurality of pipeline matching blocks, the elastic bodies are located between the outer side wall of the pipeline and the inner side wall of the hoop, the hoop matching blocks are arranged on the sides, close to the hoop, of the elastic bodies, and the pipeline matching blocks are arranged on the sides, close to the pipeline, of the elastic bodies; a square strain groove penetrating through the front side wall to the rear side part of each elastic body is formed in the middle of the front side part of each elastic body, a half-bridge piece is attached to the side wall, close to the pipeline and the hoop, in each strain groove, and the two half-bridge pieces in each strain groove form a Wheatstone bridge; an anti-overload groove is formed in the side, close to the pipeline and the hoop, of the front side portion of each elastic body. The device has the advantages of high precision grade, convenience in installation and calibration, simplicity in external installation and operation, good stability and low cost.

Description

Technical Field

[0001] This utility model relates to the field of pipeline measurement technology, and in particular to a resistance strain sensor device for measuring the expansion force of a pipeline. Background Technology

[0002] Currently, in order to prevent excessive pressure buildup inside pipes from causing the expansion force on the pipe wall to exceed the ultimate strength of the pipe material, leading to pipe rupture and accidents, more and more people want to understand the actual expansion force on the pipe wall by measuring the force.

[0003] Resistance strain gauge sensors have always been an excellent type of sensor for measuring various force values, but there have been many problems in measuring the expansion force of pipes: 1. The force direction of the sensor inside the pipe is not fixed, making accurate measurement impossible; 2. The inside of the pipe is humid and hot, and ordinary sensors cannot work normally under these conditions; 3. The installation and operation of sensors inside the pipe are very inconvenient.

[0004] Therefore, based on this practical application scenario, we designed a resistance strain sensor device to measure the pressure of the pipe expanding outward at different angles. Utility Model Content

[0005] The purpose of this invention is to provide a resistance strain sensor device for measuring the expansion force of a pipeline, which has the advantages of high accuracy, convenient installation and calibration, simple external installation and operation, good stability, and low cost.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A resistance strain sensor device for measuring the expansion force of a pipe includes a pipe placed longitudinally and a resistance strain sensor assembly, wherein the resistance strain sensor assembly is fixedly sleeved on the outer wall of the pipe.

[0008] The resistance strain sensor assembly includes a clamp, several elastic bodies, several clamp mating blocks, and several pipe mating blocks. Each elastic body is a square block. The clamp is fitted onto the pipe. The elastic bodies are located between the outer wall of the pipe and the inner wall of the clamp. Each elastic body has a clamp mating block on the side near the clamp and a pipe mating block on the side near the pipe.

[0009] A square strain groove is provided in the middle of the front side of each elastic body, extending from its front sidewall to its rear side. A half-bridge plate is attached to the sidewall of each strain groove near the pipe and clamp. The two half-bridge plates inside each strain groove form a Wheatstone bridge.

[0010] Each of the elastomers has an overload protection groove on the front side near the pipe and clamp.

[0011] The preferred solution is as follows:

[0012] Preferably, each of the elastic bodies has two first threaded holes on the side near the clamping block, and each of the elastic bodies has two second threaded holes on the side near the pipe fitting block, and each of the first threaded holes and the second threaded holes is connected to its corresponding overload protection groove.

[0013] Each clamping block has two first circular through holes on the side near the clamp, and the first circular through hole of each clamping block corresponds to the position of the first threaded through hole of its corresponding elastic body.

[0014] Each of the pipe fitting blocks has two second circular through holes on the side closest to the pipe, and the second circular through hole of each pipe fitting block corresponds to the position of the second threaded through hole of its corresponding elastomer.

[0015] The inner sidewall of the clamp is provided with a plurality of third circular through holes, and the plurality of third circular through holes correspond to the positions of two first circular through holes of a plurality of clamp mating blocks;

[0016] Each of the third circular holes of the clamp is provided with a first bolt, and each first bolt passes through the clamp and the clamp mating block and is threadedly connected to its corresponding first threaded hole.

[0017] Each of the pipe fitting blocks has two clearance grooves on the side near the pipe. The position of each clearance groove corresponds to the position of the second circular through hole of the pipe fitting block. Each clearance groove of the pipe fitting block is provided with a second bolt. Each second bolt passes through its corresponding second circular through hole and is threadedly connected to its corresponding second threaded through hole.

[0018] Preferably, the side of each pipe mating block closest to the pipe is in the shape of a first arc, and the side of each clamp mating block closest to the clamp is in the shape of a second arc.

[0019] Preferably, each of the clamping blocks has a chamfer on the front side of the side closest to the clamp.

[0020] Preferably, a wire outlet hole is provided on one side of the strain gauge.

[0021] In summary, this utility model has the advantages of simple installation and operation, good stability, and low cost; it can measure the internal expansion force of the pipeline through a resistance strain gauge sensor assembly by fixing it with an outer ring clamp. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structural design of the embodiment;

[0023] Figure 2 This is a schematic diagram of the overall structural design of the resistance strain sensor assembly in the embodiment.

[0024] Figure 3 This is a partial cross-sectional view of the resistance strain sensor assembly in an embodiment.

[0025] In the diagram, 1 is the pipe; 2 is the resistance strain sensor assembly; 211 is the clamp; 212 is the elastomer; 213 is the clamp mating block; 214 is the pipe mating block; 215 is the strain groove; 216 is the half-bridge plate; 217 is the overload protection groove; 218 is the first bolt; 219 is the second bolt; and 220 is the cable outlet. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings.

[0028] like Figures 1-3 As shown, a resistance strain sensor device for measuring the expansion force of a pipe includes a pipe 1 placed longitudinally and a resistance strain sensor assembly 2, which is fixedly sleeved on the outer wall of the pipe 1.

[0029] The resistance strain sensor assembly 2 includes a clamp 211, several elastic bodies 212, several clamp mating blocks 213, and several pipe mating blocks 214. Each elastic body 212 is a square block. The clamp 211 is fitted onto the pipe 1. Several elastic bodies 212 are located between the outer wall of the pipe 1 and the inner wall of the clamp 211. Each elastic body 212 has a clamp mating block 213 on the side near the clamp 211 and a pipe mating block 214 on the side near the pipe 1.

[0030] Several elastic bodies 212 of the resistance strain sensor assembly 2 are fixed around the pipe 1 from different angles. The elastic bodies 212 are fixed by clamps 211, several clamp mating blocks 213, and several pipe mating blocks 214. When the inside of the pipe 1 is subjected to pressure, the deformation of the pipe 1 wall transmits the force to the resistance strain sensor assembly 2.

[0031] Each elastic body 212 has a square strain gauge 215 extending from its front sidewall to its rear sidewall at the middle of its front side. Inside each strain gauge 215, near the sidewall of the pipe 1 and clamp 211, are attached half-bridge plates 216. The two half-bridge plates 216 inside each strain gauge 215 form a Wheatstone bridge. The square structure of the strain gauge 215 ensures more uniform force perception in the direction of force application, guaranteeing the accuracy of the detection. A wire outlet 220 is provided on one side of the strain gauge 215, through which the wires of the Wheatstone bridge are led out.

[0032] Each elastic body 212 has an overload protection groove 217 on the front side near the pipe 1 and the clamp 211. The two overload protection grooves 217 of each elastic body 212 are staggered. The overload protection groove 217 near the pipe 1 is located on the right side, and the overload protection groove 217 near the clamp 211 is located on the left side.

[0033] Each elastic body 212 has two first threaded holes on the side near the clamping block 213, and each elastic body 212 has two second threaded holes on the side near the pipe fitting block 214. Each first threaded hole and each second threaded hole are connected to its corresponding overload protection groove 217.

[0034] Each clamping block 213 has two first circular through holes on the side near the clamp 211, and the first circular through hole of each clamping block 213 corresponds to the position of the first threaded through hole of its corresponding elastic body 212.

[0035] Each pipe mating block 214 has two second circular through holes on the side near the pipe 1. The second circular through hole of each pipe mating block 214 corresponds to the position of the second threaded through hole of its corresponding elastic body 212.

[0036] The inner sidewall of the clamp 211 is provided with several third circular through holes, and the positions of the several third circular through holes correspond to the positions of the two first circular through holes of the clamp mating blocks 213, respectively.

[0037] Each of the third circular holes of the clamp 211 is provided with a first bolt 218, and each first bolt 218 passes through the clamp 211 and the clamp mating block 213 and is threadedly connected to its corresponding first threaded hole.

[0038] Each pipe fitting block 214 has two clearance grooves on the side near the pipe 1. The position of each clearance groove corresponds to the position of the second circular through hole of the pipe fitting block 214. The clearance groove of the pipe fitting block 214 is provided with a second bolt 219. Each second bolt 219 passes through its corresponding second circular through hole and is threadedly connected to its corresponding second threaded through hole.

[0039] Each pipe mating block 214 has a first arc shape on the side closest to the pipe 1, and each clamp mating block 213 has a second arc shape on the side closest to the clamp 211. The pipe mating block 214 fully abuts against the pipe 1 through the first arc shape, and the clamp mating block 213 abuts against the clamp 211, so that the force-bearing surfaces are in contact.

[0040] Each clamping block 213 has a chamfer on the front side of the side closest to the clamp 211 to center its force-bearing surface and ensure the accuracy of the test data.

[0041] Specific implementation process:

[0042] When the pipe 1 expands, the force of the pipe 1 acts on the pipe mating block 214. Since the two anti-overload grooves 217 are staggered, when the right side of the pipe mating block 214 is subjected to force, the right side of the elastic block near the pipe 1 moves into its corresponding anti-overload groove 217. At this time, the left side of the elastic block is displaced towards the pipe 1. At this time, the two half-bridge plates 216 deform.

[0043] When the left side of the pipe fitting block 214 is subjected to force, the left side of the elastic block near the clamp 211 moves into its corresponding overload protection groove 217. At this time, the right side of the elastic block is displaced towards the clamp 211, and the two half-bridge plates 216 deform.

[0044] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A resistance strain sensor device for measuring the expansion force of a pipe, characterized by: The utility model provides a kind of strain sensor, including longitudinally placed pipeline (1), resistance strain sensor assembly (2), the resistance strain sensor assembly (2) is fixedly sleeved on the outer wall of pipeline (1); The resistance strain sensor assembly (2) includes hoop (211), several elastomers (212), several hoop matching blocks (213), several pipeline matching blocks (214), each of the elastomers (212) is square block, the hoop (211) is sleeved on the pipeline (1), several elastomers (212) are located between the outer wall of pipeline (1) and the inner wall of hoop (211) respectively, each elastomer (212) is close to the side of hoop (211) and is equipped with hoop matching block (213), each elastomer (212) is close to the side of pipeline (1) and is equipped with pipeline matching block (214); The middle position of the front side of each elastomer (212) is provided with square strain groove (215) penetrating through the front side wall to the back side, each strain groove (215) is close to the wall of pipeline (1) and hoop (211) and is pasted with half bridge (216) inside, two half bridges (216) inside each strain groove (215) form a wheatstone bridge; The side of each elastomer (212) close to pipeline (1) and hoop (211) is provided with anti-overload groove (217).

2. A resistance strain sensor device for measuring the expansion force of a pipe according to claim 1, characterized in that: The side of each elastomer (212) close to hoop matching block (213) is provided with two first threaded holes, the side of each elastomer (212) close to pipeline matching block (214) is provided with two second threaded holes, each first threaded hole and second threaded hole is communicated with the corresponding anti-overload groove (217); The side of each hoop matching block (213) close to hoop (211) is provided with two first circular holes, the first circular hole of each hoop matching block (213) corresponds to the position of the first threaded hole of the corresponding elastomer (212); The side of each pipeline matching block (214) close to pipeline (1) is provided with two second circular holes, the second circular hole of each pipeline matching block (214) corresponds to the position of the second threaded hole of the corresponding elastomer (212); The inner wall of the hoop (211) is provided with several third circular holes, and the several third circular holes correspond to the positions of the two first circular holes of the several hoop matching blocks (213) respectively; Each third circular hole of the hoop (211) is provided with a first bolt (218), and each first bolt (218) is threadedly connected to the corresponding first threaded hole by penetrating through the hoop (211) and the hoop matching block (213). Each of the pipeline fitting blocks (214) is provided with two position slots near one side of the pipeline (1), the position of each of the position slots corresponds to the position of the second circular through hole of the pipeline fitting block (214), the inside of each of the position slots of the pipeline fitting block (214) is provided with a second bolt (219), each of the second bolts (219) is screwed through the corresponding second circular through hole and the corresponding second threaded through hole.

3. A resistance strain sensor device for measuring the expansion force of a pipe according to claim 1, characterized in that: Each of the pipeline fitting blocks (214) is first arc-shaped near one side of the pipeline (1), each of the hoop fitting blocks (213) is second arc-shaped near one side of the hoop (211).

4. A resistance strain sensor device for measuring the expansion force of a pipe according to claim 3, wherein: The front side of the side of each of the hoop fitting blocks (213) near the hoop (211) is provided with a chamfer.

5. The electrical resistance strain sensor device for measuring the expansion force of a pipe according to claim 1, wherein: One side of the strain groove (215) is provided with a wire outlet hole (220).

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