A compression type tension sensor calibration fixture and method of use

Abstract

The present application relates to the technical field of oilfield geological exploration, and discloses a compression type tension sensor calibration clamp, upper supports and lower supports are staggered, the upper support comprises an upper support top plate, a plurality of upper support connecting rods, an upper support bottom plate and a return assembly; the lower support comprises a lower support top plate and a support frame, the lower support top plate is arranged on the top of the support frame to form a frame structure, one end of the plurality of upper support connecting rods is arranged on the upper support top plate, the other end penetrates through the lower support top plate and is connected to the upper support bottom plate, the upper support bottom plate is located in the frame structure, and the compression type tension sensor is placed on the upper support bottom plate, the upper support bottom plate is driven to move up and down in the frame structure through the plurality of upper support connecting rods, and the compression type tension sensor is arranged to be pressed by the upper support and the lower support top plate, the compression type tension sensor is compressed for measurement under the action of the tension calibration device providing tension through elongation, so that the compression type calibration of the tension sensor is completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oilfield geological exploration, in particular to a compression type tension sensor calibration clamp. BACKGROUND

[0002] In the logging process, the tension sensor is installed on the ground Martin Daik, and the real-time measured cable tension value changes together with the tension value measured by the downhole instrument to judge the running state of the instrument string in the well. When the instrument encounters resistance, the Martin Daik tension sensor value becomes smaller, and when the instrument is stuck, the Martin Daik tension sensor value becomes larger, so as to provide data reference for the ground operator in solving the instrument running problem, and to take corresponding measures according to the actual situation.

[0003] The tension sensor is measured by displacement sensing principle, and the tension size is indirectly measured by the different positions of the core rod in the displacement sensor. According to the relationship between the moving direction of the core rod and the change of the tension value, the tension sensor is divided into elongation type and compression type. The core rod length becomes longer and the tension value becomes larger, which is the elongation type tension sensor, and the core rod length becomes shorter and the tension value becomes larger, which is the compression type tension sensor. The tension sensor needs to be calibrated after being used for a period of time to determine whether its performance meets the field use requirements. The existing tension calibration device is mostly stretching type, which is suitable for elongation type tension sensor calibration. It is necessary to innovate a universal clamp to use the stretching type tension calibration device to calibrate the compression type tension sensor, reduce the investment cost, and meet the on-site rapid calibration demand. SUMMARY

[0004] In order to overcome the defects of the prior art, the purpose of the present application is to provide a compression type tension sensor calibration clamp to solve the technical problem of how to calibrate the compression type tension sensor.

[0005] The present application is realized by the following technical solutions:

[0006] A compression type tension sensor calibration clamp, comprising an upper support and a lower support; the upper support comprises an upper support top plate, a plurality of upper support connecting rods, an upper support bottom plate and a return assembly; the lower support comprises a lower support top plate and a support frame, the lower support top plate is arranged at the top of the support frame to form a frame structure, one end of the plurality of upper support connecting rods is arranged on the upper support top plate, and the other end penetrates through the lower support top plate and is connected to the upper support bottom plate, the upper support bottom plate is located in the frame structure, and the compression type tension sensor is placed on the upper support bottom plate, the upper support bottom plate drives the frame structure to move up and down through the plurality of upper support connecting rods, and the compression type tension sensor is tightly arranged with the lower support top plate, the bottom of the upper support top plate and the support frame is provided with a clamp connecting handle for connecting the tension calibration device to provide tension; the return assembly is arranged between the upper support bottom plate and the lower support top plate for the return between the upper support bottom plate and the lower support top plate.

[0007] Preferably, the edge of the upper support top plate is provided with a first connecting rod mounting hole, and the two ends of the upper support connecting rod are provided with connecting rod mounting threads, wherein the connecting rod mounting thread at one end of the upper support connecting rod penetrates through the first connecting rod mounting hole and is assembled with a retreat-proof nut, and the other end is sequentially passed through the lower support top plate and the upper support bottom plate and assembled with a retreat-proof nut.

[0008] Preferably, the center of the upper support top plate is provided with a first connecting handle mounting hole, the bottom center of the support frame is provided with a second connecting handle mounting hole, the first connecting handle mounting hole and the second connecting handle mounting hole are coaxially corresponding, and the clamp connecting handle is vertically assembled in the first connecting handle mounting hole and the second connecting handle mounting hole, respectively.

[0009] Further, the clamp connecting handle is provided with a connecting rod mounting hole, the connecting rod mounting hole penetrates through the connecting rod, and the connecting rod is connected with the tension calibration device.

[0010] Further, one end of the clamp connecting handle is provided with a mounting thread, and the mounting thread is assembled with a connecting handle retreat-proof nut through the first connecting handle mounting hole or the second connecting handle mounting hole, respectively.

[0011] Preferably, the return assembly includes a plurality of return support rods and a limiting spring, the plurality of return support rods are arranged on the lower support top plate through the upper support bottom plate, the upper support bottom plate moves up and down on the plurality of return support rods, and the limiting spring is located between the upper support bottom plate and the lower support top plate and is sleeved on the return support rod.

[0012] Preferably, the edge of the upper support bottom plate is respectively provided with a plurality of second connecting rod mounting holes and first return support rod mounting holes, the plurality of second connecting rod mounting holes are used to correspond to connect the plurality of upper support connecting rods, and the plurality of first return support rod mounting holes are used to correspond to connect the return assembly; the center position of the upper support bottom plate is provided with a limiting groove, and the compression type tension sensor is assembled on the limiting groove.

[0013] Preferably, the lower support top plate includes a plurality of second return support rod mounting holes and third connecting rod mounting holes, the plurality of third connecting rod mounting holes are used to correspond to connect the plurality of upper support connecting rods, and the plurality of second return support rod mounting holes are used to correspond to connect the return assembly.

[0014] Preferably, the upper support top plate, the upper support bottom plate, the lower support top plate and the bottom of the support frame are coaxially arranged.

[0015] A use method of a compression type tension sensor calibration clamp, based on the compression type tension sensor calibration clamp, includes the following processes:

[0016] In the process of calibrating the compression tension sensor, the tension calibration device drives the upper support top plate of the upper support to move upward, and the tension calibration device drives the support frame of the lower support to move downward, the upper support bottom plate is driven by the upper support connecting rod to move upward, and the lower support top plate is driven by the support frame to move downward, at this time, the gap between the upper support bottom plate and the lower support top plate is reduced until the upper support bottom plate and the lower support top plate compress the compression tension sensor to drive the inner core rod of the compression tension sensor to compress, so that the purpose of calibrating the tension sensor is achieved.

[0017] Compared with the prior art, the present application has the following beneficial technical effects:

[0018] The present application provides a compression tension sensor calibration fixture, by interlacing the upper support and the lower support, wherein the upper support includes an upper support top plate, a plurality of upper support connecting rods, an upper support bottom plate and a return assembly; the lower support includes a lower support top plate and a support frame, the lower support top plate is arranged on the top of the support frame to form a frame structure, one end of the plurality of upper support connecting rods is arranged on the upper support top plate, and the other end penetrates the lower support top plate and is connected to the upper support bottom plate, the upper support bottom plate is located in the frame structure, and the compression tension sensor is placed on the upper support bottom plate, the upper support bottom plate is driven by the plurality of upper support connecting rods to move up and down in the frame structure, and the compression tension sensor is tightly arranged between the upper support bottom plate and the lower support top plate, the compression tension sensor can be compressed for measurement under the action of the tension calibration device providing tension through elongation, so as to complete the compression calibration of the tension sensor.

[0019] Further, the edge of the upper support top plate is provided with a first connecting rod mounting hole, and the two ends of the upper support connecting rod are provided with connecting rod mounting threads, wherein the connecting rod mounting threads at one end of the upper support connecting rod penetrate the first connecting rod mounting hole and are assembled with anti-back nuts, and the other end is sequentially assembled with anti-back nuts through the lower support top plate and the upper support bottom plate, thereby improving the stability of the upper support structure and facilitating the compression calibration test of the tension sensor through the stretching of the upper support and the lower support.

[0020] Further, the center of the upper support top plate is provided with a first connecting handle mounting hole, and the bottom center position of the support frame is provided with a second connecting handle mounting hole, the first connecting handle mounting hole and the second connecting handle mounting hole are coaxially corresponding, the fixture connecting handle is vertically assembled on the first connecting handle mounting hole and the second connecting handle mounting hole, and is connected with the mounting fixture connecting handle, so that the fixture connecting handle is connected with the tension calibration device to provide tension.

[0021] Furthermore, one end of the clamp connecting handle is provided with a mounting thread, which is respectively passed through the first connecting handle mounting hole or the second connecting handle mounting hole and then assembled with a connecting handle anti-retraction nut, thereby ensuring the stability of the installation between the clamp connecting handle and the first connecting handle mounting hole or the second connecting handle mounting hole, and facilitating compression calibration testing of the tension sensor.

[0022] Furthermore, the return assembly includes several return support rods and limit springs. The several return support rods are arranged on the top plate of the lower bracket through the upper bracket bottom plate. The upper bracket bottom plate moves up and down on the several return support rods. The limit spring is located between the upper bracket bottom plate and the lower bracket top plate, and is sleeved on the return support rods, which can effectively compress the upper bracket bottom plate and the lower bracket top plate and then return them.

[0023] Furthermore, a plurality of second connecting rod mounting holes and a first return support rod mounting holes are respectively provided on the edges of the upper bracket bottom plate. The plurality of second connecting rod mounting holes are used to connect a plurality of upper bracket connecting rods, and the plurality of first return support rod mounting holes are used to connect a plurality of return assemblies. This improves the stability of the assembly of the upper bracket connecting rod and the return assembly on the upper bracket top plate. A limiting groove is provided at the center position of the upper bracket bottom plate, and the compression tension sensor is assembled on the limiting groove to prevent the sensor from shifting left and right during the calibration process.

[0024] Furthermore, the top plate of the lower bracket includes several second return support rod mounting holes and third connecting rod mounting holes. Several third connecting rod mounting holes are used to connect correspondingly several upper bracket connecting rods, and several second return support rod mounting holes are used to connect correspondingly return components, thereby improving the stability of the assembly of the upper bracket connecting rods and the return components on the top plate of the lower bracket.

[0025] Furthermore, the upper bracket top plate, the upper bracket bottom plate, the lower bracket top plate and the bottom of the support frame are all coaxially arranged, so that the pressure and compression force provided by the compression tension sensor calibration fixture can be uniform, ensuring the accuracy of the compression calibration test of the tension sensor.

[0026] The present invention provides a method for using a compression tension sensor calibration fixture, which effectively utilizes the existing tensile tension calibration device to calibrate the compression tension sensor, uses the tensile tension calibration device to calibrate the compression tension sensor, reduces investment costs, and meets the needs of on-site rapid calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the structure of the calibration fixture for the compression tension sensor of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the clamp connecting handle in the present invention;

[0029] Figure 3Structure diagram of the return support rod assembly in the present application;

[0030] Figure 4 Structure diagram of the support connecting rod in the present application;

[0031] Figure 5 Front view of the upper support top plate in the present application;

[0032] Figure 6 Front view of the upper support bottom plate in the present application;

[0033] Figure 7 Front view of the lower support top plate in the present application;

[0034] Figure 8 Structure diagram of the lower support in the present application;

[0035] In the figure: 1-upper support; 2-lower support; 3-compression tension sensor; 4-clamp connecting handle; 5-anti-back nut; 6-upper support top plate; 7-upper support connecting rod; 8-upper support bottom plate; 9-return support rod; 10-limiting spring; 11-lower support top plate; 12-support frame; 41-connecting rod mounting hole; 42-mounting screw thread; 43-anti-back nut of connecting handle; 71-connecting rod mounting screw thread; 61-first connecting handle mounting hole; 62-first connecting rod mounting hole; 81-limiting groove; 82-first return support rod mounting hole; 83-second connecting rod mounting hole; 111-second return support rod mounting hole; 112-third connecting rod mounting hole; 121-second connecting handle mounting hole. DETAILED DESCRIPTION

[0036] In order to make the person skilled in the art better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0037] The present application will be further described in detail below in combination with the drawings:

[0038] Reference Figure 1 In an embodiment of the present application, a compression tension sensor calibration clamp is provided, which comprises an upper support 1, a lower support 2, a compression tension sensor 3 and two groups of clamp connecting handles 4. The upper support 1 comprises an upper support top plate 6, a plurality of upper support connecting rods 7, an upper support bottom plate 8 and a return assembly. The lower support 2 comprises a lower support top plate 11 and a support frame 12.

[0039] Specifically, according to Figure 2As shown, the clamp connecting handle 4 is provided with a connecting rod mounting hole 41, a connecting rod is penetrated in the connecting rod mounting hole 41, the connecting rod is connected with the tension calibration device, one end of the clamp connecting handle 4 is provided with a mounting thread 42, the mounting thread 42 is respectively assembled with a connecting handle anti-back nut 43 after passing through a first connecting handle mounting hole 61 or a second connecting handle mounting hole 121, so as to prevent the clamp connecting handle 4 from falling off during use.

[0040] Specifically, according to Figure 3 As shown, the return assembly includes a plurality of return support rods 9 and a limiting spring 10, the plurality of return support rods 9 are arranged on the lower support top plate 11 through the upper support bottom plate 8, the upper support bottom plate 8 moves up and down on the plurality of return support rods 9, the limiting spring 10 is located between the upper support bottom plate 8 and the lower support top plate 11 and is sleeved on the return support rod 9, under the support of the limiting spring 10, an open space is formed between the upper support bottom plate 8 and the lower support top plate 11, so as to install the tension sensor, when the calibration operation is performed, the gap between the upper support bottom plate 8 and the lower support top plate 11 becomes smaller, driving the tension sensor core rod to make compression movement.

[0041] Specifically, according to Figure 4 and Figure 5 As shown, the edge of the upper support top plate 6 is respectively provided with a first connecting rod mounting hole 62, both ends of the upper support connecting rod 7 are provided with a connecting rod mounting thread 71, one end of the upper support connecting rod 7 is assembled with an anti-back nut 5 after penetrating the first connecting rod mounting hole 62, and the other end is assembled with an anti-back nut 5 after sequentially passing through the lower support top plate 11 and the upper support bottom plate 8.

[0042] Among them, according to Figure 5 and Figure 8 As shown, the center of the upper support top plate 6 is provided with a first connecting handle mounting hole 61, the bottom center of the support frame 12 is provided with a second connecting handle mounting hole 121, the first connecting handle mounting hole 61 and the second connecting handle mounting hole 121 are coaxial and corresponding, and the clamp connecting handle 4 is respectively vertically assembled on the first connecting handle mounting hole 61 and the second connecting handle mounting hole 121

[0043] Specifically, according to Figure 6 As shown, the edge of the upper support bottom plate 8 is respectively provided with a plurality of second connecting rod mounting holes 83 and first return support rod mounting holes 82, the plurality of second connecting rod mounting holes 83 are used to correspond to the plurality of upper support connecting rods 7, and the plurality of first return support rod mounting holes 82 are used to correspond to the return assembly; the center of the upper support bottom plate 8 is provided with a limiting groove 81, and the compression type tension sensor 3 is assembled on the limiting groove 81.

[0044] Specifically, according to Figure 7As shown, the lower support top plate 11 includes a plurality of second return support rod mounting holes 111 and a plurality of third connecting rod mounting holes 112, the plurality of third connecting rod mounting holes 112 being used to correspondingly connect a plurality of upper support connecting rods 7, and the plurality of second return support rod mounting holes 111 being used to correspondingly connect a return assembly.

[0045] In one embodiment of the present application, the installation process of the compression type tension sensor calibration fixture is as follows:

[0046] 1) Connect the fixture connecting handle 4 to the upper support top plate 6 through the first connecting handle mounting hole of the upper support top plate 6, and fix the fixture connecting handle 4 using the connecting handle anti-backout nut 43 to prevent the fixture connecting handle 4 from falling off during the tension test.

[0047] 2) Connect the fixture connecting handle 4 to the support frame 12 through the second connecting handle mounting hole of the support frame 12, and fix the fixture connecting handle 4 using the connecting handle anti-backout nut 43 to prevent the fixture connecting handle 4 from falling off during the tension test.

[0048] 3) Place the upper support bottom plate 8 in the frame structure, pass the four upper support connecting rods 7 through the mounting holes of the upper support top plate 6 and the upper support bottom plate 8, and fix them using anti-backout nuts to make the support top plate 6 and the upper support bottom plate 8 into an integral combination to form the fixture upper support. At this time, the support top plate 6, the upper support bottom plate 8, and the lower support top plate 11 are in a parallel state.

[0049] 4) Combine the return support rod 9 and the limiting spring 10, pass the return support rod 9 through the return support rod mounting holes of the upper support bottom plate 8 and the lower support top plate 11, and fix them using anti-backout nuts to form a tension sensor installation space between the upper support lower fixing disc and the fixture lower support under the action of the limiting spring.

[0050] 5) Connect the fixture connecting handle 4 of the upper and lower supports to the upper and lower connecting interfaces of the tension sensor calibration device, place the compression type tension sensor in the tension sensor limiting groove of the support lower fixing disc, and the entire calibration fixture is in a vertical state.

[0051] In one embodiment of the present application, a use method of a compression type tension sensor calibration fixture is provided, which is based on the above-mentioned compression type tension sensor calibration fixture and includes the following processes:

[0052] In the calibration of the compression tension sensor, the tension calibration device drives the upper support top plate 6 of the upper support 1 to move upward, while the tension calibration device drives the support frame 12 of the lower support 2 to move downward, the support top plate 6 drives the upper support bottom plate 8 to move upward through a plurality of upper support connecting rods 7, and the lower support top plate 11 moves downward under the drive of the support frame 12, at this time, the gap between the upper support bottom plate 8 and the lower support top plate 11 is reduced until the upper support bottom plate 8 and the lower support top plate 11 compress the compression tension sensor 3 and drive the compression tension sensor inner core rod to compress, so as to achieve the purpose of tension meter sensor calibration.

[0053] In summary, the present application provides a compression tension sensor calibration fixture, by interlacing the upper support and the lower support, wherein the upper support includes an upper support top plate, a plurality of upper support connecting rods, an upper support bottom plate and a return assembly; the lower support includes a lower support top plate and a support frame, the lower support top plate is arranged on the top of the support frame to form a frame structure, one end of the plurality of upper support connecting rods is arranged on the upper support top plate, and the other end is connected to the upper support bottom plate through the lower support top plate, the upper support bottom plate is located in the frame structure, and the compression tension sensor is placed on the upper support bottom plate, the upper support bottom plate is driven to move up and down in the frame structure through the plurality of upper support connecting rods, and the compression tension sensor is compressed and arranged with the lower support top plate, the compression tension sensor can be compressed and measured by the upper support and the lower support under the action of the tension calibration device providing tension through elongation, so as to complete the compression calibration of the tension sensor.

[0054] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it, although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced, without departing from the spirit and scope of the present application, any modification or equivalent replacement, which should be covered in the protection scope of the claims of the present application.

Claims

1. A compression tension sensor calibration fixture, characterized in that: The invention comprises an upper bracket (1) and a lower bracket (2); the upper bracket (1) comprises an upper bracket top plate (6), a plurality of upper bracket connecting rods (7), an upper bracket bottom plate (8) and a return assembly; the lower bracket (2) comprises a lower bracket top plate (11) and a support frame (12); the lower bracket top plate (11) is arranged on the top of the support frame (12) to form a frame structure; one end of the plurality of upper bracket connecting rods (7) is arranged on the upper bracket top plate (6), and the other end passes through the lower bracket top plate (11) and is connected to the upper bracket bottom plate (8); the upper bracket bottom plate (8) is located in the frame structure. A compression tension sensor (3) is placed on the upper bracket bottom plate (8), and the upper bracket bottom plate (8) is driven by a plurality of upper bracket connecting rods (7) to move up and down in the frame structure, and is pressed against the compression tension sensor (3) by the lower bracket top plate (11). A clamp connecting handle (4) is provided at the bottom of the upper bracket top plate (6) and the support frame (12), which is used to connect the tension calibration device to provide tension; the return assembly is provided between the upper bracket bottom plate (8) and the lower bracket top plate (11), and is used for return between the upper bracket bottom plate (8) and the lower bracket top plate (11).

2. A compression tension sensor calibration fixture according to claim 1, characterized in that: The edges of the upper bracket top plate (6) are respectively provided with first connecting rod mounting holes (62), and both ends of the upper bracket connecting rod (7) are provided with connecting rod mounting threads (71), wherein the connecting rod mounting thread (71) at one end of the upper bracket connecting rod (7) passes through the first connecting rod mounting hole (62) and is then assembled with an anti-retraction nut (5), and the other end passes through the lower bracket top plate (11) and the upper bracket bottom plate (8) in sequence and is then assembled with an anti-retraction nut (5).

3. The compression tension sensor calibration fixture according to claim 1, characterized in that: A first connecting handle mounting hole (61) is provided at the center of the upper bracket top plate (6), and a second connecting handle mounting hole (121) is provided at the center of the bottom of the support frame (12). The first connecting handle mounting hole (61) corresponds to the second connecting handle mounting hole (121) coaxially, and the clamp connecting handle (4) is vertically assembled on the first connecting handle mounting hole (61) and the second connecting handle mounting hole (121), respectively.

4. A compression tension sensor calibration fixture according to claim 3, characterized in that: A connecting rod mounting hole (41) is provided on the clamp connecting handle (4), a connecting rod passes through the connecting rod mounting hole (41), and the connecting rod is connected to the tension calibration device.

5. The compression tension sensor calibration fixture according to claim 3, characterized in that: One end of the clamp connecting handle (4) is provided with a mounting thread (42), and the mounting thread (42) passes through the first connecting handle mounting hole (61) or the second connecting handle mounting hole (121) and is then assembled with a connecting handle anti-retraction nut (43).

6. The compression tension sensor calibration fixture according to claim 1, characterized in that: The return assembly comprises a plurality of return support rods (9) and a limit spring (10). The plurality of return support rods (9) are arranged on the lower bracket top plate (11) through the upper bracket bottom plate (8). The upper bracket bottom plate (8) moves up and down on the plurality of return support rods (9). The limit spring (10) is located between the upper bracket bottom plate (8) and the lower bracket top plate (11) and is sleeved on the return support rods (9).

7. The compression tension sensor calibration fixture according to claim 1, characterized in that: The edges of the upper bracket base plate (8) are respectively provided with a plurality of second connecting rod mounting holes (83) and a first return support rod mounting hole (82), wherein the plurality of second connecting rod mounting holes (83) are used for correspondingly connecting a plurality of upper bracket connecting rods (7), and the plurality of first return support rod mounting holes (82) are used for correspondingly connecting return components; a limiting groove (81) is provided at the center position of the upper bracket base plate (8), and the compression tension sensor (3) is assembled on the limiting groove (81).

8. The compression tension sensor calibration fixture according to claim 1, characterized in that: The lower bracket top plate (11) comprises a plurality of second return support rod mounting holes (111) and a third connecting rod mounting hole (112), wherein the plurality of third connecting rod mounting holes (112) are used for correspondingly connecting to a plurality of upper bracket connecting rods (7), and the plurality of second return support rod mounting holes (111) are used for correspondingly connecting to return assemblies.

9. The compression tension sensor calibration fixture according to claim 1, characterized in that: The upper bracket top plate (6), the upper bracket bottom plate (8), the lower bracket top plate (11) and the bottom of the support frame (12) are all coaxially arranged.

10. A method for using a compression tension sensor calibration fixture, based on the compression tension sensor calibration fixture according to any one of claims 1 to 9, characterized in that: The process includes the following: When calibrating the compression tension sensor, the tension calibration device drives the upper bracket top plate (6) of the upper bracket (1) to move upward, and at the same time, the tension calibration device drives the support frame (12) of the lower bracket (2) to move downward, and the bracket top plate (6) drives the upper bracket bottom plate (8) to move upward through a number of upper bracket connecting rods (7), and the lower bracket top plate (11) moves downward under the drive of the support frame (12). At this time, the gap between the upper bracket bottom plate (8) and the lower bracket top plate (11) is reduced until the upper bracket bottom plate (8) and the lower bracket top plate (11) press the compression tension sensor (3) and drive the inner core rod of the compression tension sensor to perform compression movement, thereby achieving the purpose of tension meter sensor calibration.

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