Device and method for measuring shrinkage coating force of heat-shrinkable sleeve

Abstract

The invention discloses a measuring device and a measuring method for shrinkage coating force of a heat-shrinkable sleeve, the measuring device comprises a sleeve shell part, a plurality of transmission parts, a first rotating part, a measuring assembly and a data processing system, the sleeve shell part is hollow to form a rotating cavity, the sleeve shell part is provided with a plurality of transmission hole groups, the transmission parts correspondingly penetrate through the transmission hole groups, and the first rotating part is arranged on the measuring assembly. The ends, extending out of the transmission hole sets, of the transmission pieces are provided with contact pieces, the contact pieces are used for making contact with a to-be-measured pipe, one end of the first rotating piece is arranged in the rotating cavity and is in corresponding transmission connection with the multiple transmission pieces, and the measuring assembly is arranged at the end, away from the rotating cavity, of the first rotating piece. The data processing system is used for receiving rotation data of the measuring assembly and processing the rotation data to obtain shrinkage coating force data of the to-be-detected pipe, a means for detecting the shrinkage performance of a thermal shrinkage finished product is provided for the thermal shrinkage finished product, and a reliable data basis is provided for development and use of the thermal shrinkage product.

Description

Technical Field

[0001] The present invention relates to the field of measurement technology, and further to a device and method for measuring the shrinkage and covering force of a heat shrinkable tube. Background Art

[0002] In recent years, with the rapid development of new energy vehicles and energy storage industries, heat shrink tubing has been more widely used in the field of battery connection. Usually, copper or aluminum hard or soft connections are used between batteries, batteries and battery packs, and battery packs and BMS. Heat shrink tubing is the main insulating and protective material for hard or soft cables, and its performance stability is related to battery safety.

[0003] In the field of battery connection, the crack resistance of heat shrink tubing when shrinking on the connecting bar is particularly critical. The shrinkage coating force of the heat shrink tubing is one of the main factors affecting cracking. However, on the one hand, there is currently no device in the industry to quantitatively evaluate the coating force of heat shrink tubing when shrinking at high temperatures. On the other hand, there is no simple and convenient shrinkage coating force measurement device on the market. The lack of data support limits the more scientific and widespread application of heat shrink tubing.

[0004] In view of the above problems existing in the prior art, it is urgent to design a device for measuring the shrinkage wrapping force of a heat shrinkable tube to solve the above problems. Summary of the invention

[0005] In view of the above technical problems, the purpose of the present invention is to provide a device for measuring the shrinkage wrapping force of a heat shrinkable tube to solve the problems raised in the above background technology.

[0006] In order to achieve the above object, the present invention provides a device for measuring the shrinkage wrapping force of a heat shrinkable tube, comprising:

[0007] A casing member, wherein the casing member is hollow to form a rotating cavity, and a plurality of transmission hole groups are formed on the casing member;

[0008] A plurality of transmission members, each of which is arranged to pass through the transmission hole group, and each of which is provided with a contact member at one end extending out of the transmission hole group, and the contact member is used to contact the pipe to be tested;

[0009] A first rotating member, one end of which is disposed in the rotating cavity and is correspondingly connected to the plurality of transmission members;

[0010] A measuring component, the measuring component is arranged on one end of the first rotating member away from the rotating cavity, and the measuring component is used to measure the rotation data of the rotating shaft;

[0011] A data processing system for receiving the rotation data of the measurement component and processing the rotation data to obtain the shrinkage wrapping force data of the pipe to be measured.

[0012] In some embodiments, the measurement component includes a torque measurement device and a linear velocity measurement device;

[0013] The torque measurement device is disposed at one end of the first rotating member away from the rotating cavity, and the torque measurement device is configured to measure the rotation torque of the rotating shaft;

[0014] The linear velocity measurement device is disposed on the outer peripheral side of the first rotating member, and the linear velocity measurement device is configured to measure and record the rotation speed and rotation thread of the first rotating member.

[0015] In some embodiments, the linear velocity measurement device includes a linear velocity meter and a transmission wheel. The linear velocity meter and the transmission wheel are connected by a second rotating member. The transmission wheel is in contact with and abuts against the outer peripheral side of the first rotating member, so that the rotation of the first rotating member can drive the second rotating member to rotate, and further enable the linear velocity meter to measure the rotation speed and rotation thread of the first rotating member.

[0016] In some embodiments, the contact member is rotatably disposed on the transmission member, and a contact arc surface is disposed on the contact member, and the contact arc surface corresponds to the inner wall of the pipe to be measured.

[0017] In some embodiments, a plurality of the contact arc surfaces are disposed on the same plane.

[0018] In some embodiments, each of the transmission hole groups includes two transmission holes, and the transmission member sequentially passes through the two transmission holes.

[0019] In some embodiments, the cross-section of the transmission member is polygonal;

[0020] Guide sleeves are sleeved in the transmission holes, and the guide sleeves are adapted to the rotating member.

[0021] In some embodiments, the transmission member and the first rotating member are connected by a gear transmission.

[0022] According to another aspect of the present invention, the present invention further provides a measurement method, which is applied to the measurement device for the shrinkage wrapping force of the heat shrinkable sleeve as described in any of the above embodiments, and includes the following steps:

[0023] S10. Sleeving the pipe to be measured outside the housing member, and adjusting the contact member so that the contact members respectively abut against the inner wall of the pipe to be measured;

[0024] S20. Heat the pipe to be measured to cause the pipe to be measured to retract;

[0025] S30. Measure the shrinkage wrapping force generated after heating the pipe to be measured.

[0026] In some embodiments, step S30 further includes:

[0027] S31. Measure the torque data, rotational speed and rotational thread of the first rotating member through the measuring assembly.

[0028] S32. According to the relationship M = FL, the shrinkage force F of the pipe to be measured can be obtained as F = M / L, where M is the torque of the first rotating member in the measuring assembly and L is the radius of the first rotating member in the measuring assembly;

[0029] The inner diameter shrinkage distance of the pipe to be measured is equal to the rotational thread;

[0030] S33. Comprehensively process the real-time data of the shrinkage force of the pipe to be measured and the real-time data of the inner diameter shrinkage distance of the pipe to be measured to obtain a dynamic relationship diagram of the inner diameter shrinkage distance and force of the pipe to be measured.

[0031] By setting an elastic member in a stretched state, the blanking plate is biased to the side away from the collection device under normal circumstances, effectively avoiding the situation where the blanking plate resists the retrieved garbage, effectively improving the efficiency of retrieving garbage, and enabling the device to be applicable to retrieving some very light garbage.

[0032] Compared with the prior art, the measuring device for the shrinkage wrapping force of the heat-shrinkable sleeve provided by the present invention has the following beneficial effects:

[0033] 1. The measuring device for the shrinkage wrapping force of the heat-shrinkable sleeve provided by the present invention realizes obtaining a dynamic relationship diagram of the inner diameter shrinkage distance and force of the pipe to be measured by setting a contact member, a transmission member, a first rotating member and a measuring assembly, so as to obtain the shrinkage wrapping force generated by the heat-shrinkable sleeve when heated in real time. The purpose of the present invention is to provide a means for detecting the retraction performance of heat-shrinkable product finished products and provide a reliable data basis for the development and use of heat-shrinkable products;

[0034] 2. The measuring device for the shrinkage wrapping force of the heat-shrinkable sleeve provided by the present invention sets a contact arc surface on the contact member, enabling the contact member to better fit the curved surface of the inner wall of the pipe, effectively increasing the contact area, effectively improving the adaptability and stability of the device, and making the pressure distribution more uniform, thereby effectively avoiding excessive local stress concentration and effectively avoiding the situation where the pipe is damaged due to excessive stress concentration. Description of the Drawings

[0035] The above characteristics, technical features, advantages and implementation manners of the present invention will be further described below in a clear and understandable manner in conjunction with the accompanying drawings.

[0036] Figure 1 It is a schematic structural diagram of a perspective of a measuring device for the shrinkage wrapping force of a heat shrinkable sleeve of a preferred embodiment of the present invention;

[0037] Figure 2 It is a schematic structural diagram of another perspective of a measuring device for the shrinkage wrapping force of a heat shrinkable sleeve of a preferred embodiment of the present invention;

[0038] Figure 3 It is a schematic flowchart of a measuring method for the shrinkage wrapping force of a heat shrinkable sleeve of a preferred embodiment of the present invention.

[0039] Explanation of the reference numerals in the drawings:

[0040] Housing member 10, transmission member 20, contact member 30, first rotating member 40, measuring assembly 50, linear velocity measuring instrument 51, second rotating member 52, transmission wheel 53, guide sleeve 60, pipe to be measured 70, connection structure 80. Specific embodiments

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts, and other embodiments can also be obtained.

[0042] To make the drawings concise, only the parts related to the invention are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, parts with the same structure or function are only schematically shown or only one of them is marked. In this document, "one" not only means "only one", but also means "more than one" situation.

[0043] It should also be further understood that the term "and / or" used in the specification and appended claims of the present application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0044] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] In one embodiment, the reference specification Figure 1 and Figure 2 A device for measuring the shrinkage wrapping force of a heat shrinkable tube provided by the present invention comprises a shell member 10, a plurality of transmission members 20, a first rotating member 40, a measuring assembly 50 and a data processing system, wherein the shell member 10 is hollow to form a rotating cavity, a plurality of transmission hole groups are provided on the shell member 10, and the transmission members 20 are correspondingly arranged to pass through the transmission hole groups, and a contact member 30 is provided at one end of the transmission member 20 extending out of the transmission hole group, and the contact member 30 is used to contact with a pipe 70 to be measured, one end of the first rotating member 40 is arranged in the rotating cavity, and is correspondingly connected to the plurality of transmission members 20, and the measuring assembly 50 is arranged at one end of the first rotating member 40 away from the rotating cavity, and the measuring assembly 50 is used to measure the rotation data of the rotating shaft, and the data processing system is used to receive the rotation data of the measuring assembly 50, and process the rotation data to obtain the shrinkage wrapping force data of the pipe 70 to be measured.

[0047] Specifically, the housing member 10 is preferably a cylindrical object, which is used to fix and limit the moving direction of the transmission member 20. Both the transmission member 20 and the first rotating member 40 are preferably rod-shaped objects. The measuring assembly 50 is fixed on the housing member 10 through the connecting structure 80. The number of the transmission members 20 can be four groups. The four groups of transmission members 20 extend towards four directions corresponding to the first rotating member 40, and the extending directions of the transmission members 20 are all perpendicular to the inner wall of the to-be-tested pipe 70, so as to ensure that the transmitted shrinkage force is a radial shrinkage force. The transmission member 20 and the first rotating member 40 are both in transmission connection. One end of the transmission member 20 extending outside the housing member 10 is provided with a contact member 30. During actual use, the four groups of contact members 30 all correspondingly abut against the inner wall of the to-be-tested pipe 70, so that the whole measuring device can be correspondingly clamped inside the to-be-tested pipe 70. After the retraction condition of the to-be-tested pipe 70 is triggered, the contact member 30 retracts under the action of the pipe wall of the to-be-tested pipe 70, and then pushes the transmission member 20, and then drives the first rotating member 40 to rotate. Then, the measuring assembly 50 correspondingly records and measures various rotation data of the first rotating member 40. The rotation data mainly includes rotation torque, rotation speed, rotation thread, etc. The measuring assembly is correspondingly connected to the data processing system, so that the data processing system can receive the rotation data.

[0048] It should be noted that the to-be-tested pipe 70 generally refers to a heat-shrinkable tube, and can also be a heat-shrinkable braided tube, or a silicone tube with heat-shrinkable properties. The specific applicable pipe material is not limited here.

[0049] In one embodiment, referring to the attached drawings of the specification Figure 1 and Figure 2 , on the basis of the above embodiment, the measuring assembly 50 includes a torque measuring device and a linear velocity measuring device; the torque measuring device is arranged at one end of the first rotating member 40 far from the rotating cavity, and the torque measuring device is used to measure the rotation torque of the rotating shaft; the linear velocity measuring device is arranged on the outer peripheral side of the first rotating member 40, and the linear velocity measuring device is used to measure and record the rotation speed and rotation thread of the first rotating member 40.

[0050] Specifically, the torque measuring device is preferably a dynamic torque measuring device, which mainly consists of a data acquisition system and a dynamic torque sensor, and can realize real-time capture of the torque change of the rotating component under different rotation speeds and loads, and can be used for dynamic characteristic analysis of the torque. The linear velocity measuring device usually measures the rotation speed of the object to be measured by contact or photoelectric means, and then calculates the corresponding rotation speed and rotation thread by integrating parameters such as the radius of the object to be measured.

[0051] In one embodiment, referring to the attached drawings of the specification Figure 1 and Figure 2, on the basis of the above embodiments, the linear velocity measuring device includes a linear velocity measuring instrument 51 and a transmission wheel 53. The linear velocity measuring instrument 51 and the transmission wheel 53 are connected by a second rotating member 52. The transmission wheel 53 is correspondingly in contact with the outer peripheral side of the first rotating member 40, so that the rotation of the first rotating member 40 can drive the second rotating member 52 to rotate, and further enable the linear velocity measuring instrument 51 to measure the rotation speed and rotation thread of the first rotating member 40.

[0052] Specifically, the linear velocity measuring instrument 51 is a contact-type measuring device, which is arranged on one side of the torque measuring device close to the casing. The transmission wheel 53 is correspondingly connected to the linear velocity measuring instrument 51 through the second rotating member 52, and the transmission wheel 53 is also correspondingly in contact with the first rotating member 40. During actual use, the rotation of the first rotating member 40 drives the transmission wheel 53 to rotate, and then drives the second rotating member 52 to rotate, so that the linear velocity measuring instrument 51 can measure the rotation speed and rotation thread of the second rotating member 52, providing a data basis for obtaining the corresponding measurement data of the pipe to be measured 70.

[0053] In one embodiment, refer to the attached drawings of the specification Figure 1 and Figure 2 , the contact member 30 is rotatably arranged on the transmission member 20, and a contact arc surface is arranged on the contact member 30, and the contact arc surface corresponds to the inner wall of the pipe to be measured 70.

[0054] Specifically, the surface of the contact arc surface corresponding to the inner wall of the pipe to be measured 70 is an arc surface, so that during use, the contact member 30 and the pipe to be measured 70 can always maintain a fitting contact, and the contact area is large, effectively improving the adaptability and stability of the measuring device. In addition, the pressure distribution between the contact surfaces is more uniform, further effectively avoiding excessive local stress concentration, and also effectively avoiding the situation that the pipe is damaged due to excessive stress concentration. In addition, the contact member 30 is rotatably arranged on the transmission member 20, which provides convenience for adjusting the position of the measuring device inside the pipe to be measured 70, and further improves the practicality of the measuring device.

[0055] In one embodiment, refer to the attached drawings of the specification Figure 1 and Figure 2 , on the basis of the above embodiments, a plurality of contact arc surfaces are opened on the same plane.

[0056] Specifically, by adjusting the rotation structure between the contact member 30 and the transmission member 20, the contact arc surfaces are all in the same plane, so as to ensure that the transmitted contraction forces are all radial contraction forces in the same plane, effectively ensuring that the forces applied by the plurality of transmission members 20 to the first rotating member 40 can be balanced with each other in the same plane, further effectively avoiding bending moments and shear forces caused by uneven stress, and also effectively reducing the energy loss during the power transmission process, and further effectively improving the measurement accuracy of the measuring device.

[0057] In one embodiment, referring to the appended drawings of the specification Figure 1 and Figure 2 , on the basis of the above embodiment, the transmission hole group includes two transmission holes, and the transmission member 20 sequentially passes through the two transmission holes.

[0058] Specifically, the opening directions of the two transmission holes are the same, so that the transmission member 20 can pass through the two transmission holes simultaneously. Furthermore, the stability of the movement of the transmission member 20 is effectively ensured, and thus the effectiveness of power transmission is ensured.

[0059] In one embodiment, referring to the appended drawings of the specification Figure 1 and Figure 2 , on the basis of the above embodiment, the cross-section of the transmission member 20 is polygonal; guide sleeves 60 are sleeved in the transmission holes, and the guide sleeves 60 are adapted to the rotating member.

[0060] Specifically, the cross-section of the transmission member 20 is preferably square. By setting the cross-section of the transmission member 20 to be square, the phenomenon of slipping during mechanical transmission is effectively avoided, and thus the accurate transmission of torque is effectively ensured. In addition, by setting the guide sleeves 60 adapted to the transmission member 20, the ability of the transmission member 20 to resist axial displacement and the torque transmission ability are effectively improved, and the transmission member 20 is also fixed and guided, effectively improving the stability and reliability of torque transmission, and thus ensuring the accuracy of the final measurement data.

[0061] It should be noted that when the connection mode of the transmission member is hinge connection, the cross-section of the transmission member is circular.

[0062] In one embodiment, referring to the appended drawings of the specification Figure 1 and Figure 2 , the transmission member 20 and the first rotating member 40 are connected by gear transmission.

[0063] Specifically, a rack is correspondingly arranged on the transmission member 20, and a gear is correspondingly arranged on the first rotating member 40. Through the meshing between the gear and the rack, better power transmission between the transmission member 20 and the first rotating member 40 is achieved.

[0064] It should be noted that the transmission member 20 and the first rotating member 40 can also be connected by hinge transmission, or other transmission connection modes. The specific connection mode depends on actual needs and is not limited herein.

[0065] Referring to the appended drawings of the specification Figure 3 , the present invention further provides a measurement method, which is applied to the measurement device for the shrinkage wrapping force of the heat shrinkable sleeve in any of the above embodiments, and includes the following steps:

[0066] S10. Sheath the pipe 70 to be measured outside the housing member 10, and adjust the contact member 30 so that the contact member 30 abuts against the inner wall of the pipe 70 to be measured correspondingly.

[0067] S20. Heat the pipe 70 to be measured so that the pipe 70 to be measured shrinks back.

[0068] S30. Measure the shrinkage wrapping force generated after heating the pipe 70 to be measured.

[0069] Specifically, first, the pipe 70 to be measured is sleeved or wrapped around the periphery of the contact member 30 of the test device, and each contact member 30 is adjusted so that each contact member 30 abuts against the inner wall of the pipe 70 to be measured correspondingly. Then, the pipe 70 to be measured is heated by an oil bath heating method. When the pipe 70 to be measured is heated to a certain temperature, the pipe 70 to be measured triggers the shrinkage condition, and then the phenomenon that the pipe wall of the pipe 70 to be measured shrinks inward begins. When the pipe 70 to be measured shrinks inward, it drives the measuring device to start working and collect the required rotation data, and finally obtains the shrinkage wrapping force data of the pipe 70 to be measured.

[0070] In one embodiment, step S30 further includes:

[0071] S31. Measure the torque data, rotation speed and rotation thread of the first rotating member 40 through the measuring assembly 50.

[0072] S32. According to the relational expression M = FL, the shrinkage force F of the pipe 70 to be measured is F = M / L, where M is the torque of the first rotating member 40 in the measuring assembly 50, and L is the radius of the first rotating member 40 in the measuring assembly 50.

[0073] The inner diameter shrinkage distance of the pipe 70 to be measured is equal to the rotation thread.

[0074] S33. Comprehensively process the real-time data of the shrinkage force of the pipe 70 to be measured and the real-time data of the inner diameter shrinkage distance of the pipe 70 to be measured to obtain the dynamic relationship diagram of the inner diameter shrinkage distance and the force of the pipe 70 to be measured.

[0075] Specifically, after the phenomenon that the pipe wall of the pipe 70 to be measured contracts inward, it drives the contact to move back, thereby pushing the transmission member 20. The transmission member 20 drives the first rotating member 40 to rotate. The dynamic torque measuring instrument in the measuring assembly 50 is directly connected to the first rotating member 40, so as to measure and record the rotational torque of the first rotating member 40. At the same time, the linear velocity measuring instrument 51 in the measuring assembly 50 also starts to record and measure the rotational speed and rotational thread of the first rotating member 40; wherein the rotational line length of the first rotating member 40 is equal to the transmission distance of the transmission member 20, and the transmission distance of the transmission member 20 can be converted into the change of the inner diameter of the pipe 70 to be measured; then according to the mechanical relationship formula M = FL, where M is the torque of the first rotating member 40 in the measuring assembly 50, and the moment L in the formula is equal to the radius of the first rotating member 40 which is a fixed value, so the force F can be calculated by combining the data measured by the torque measuring device with the formula; then combined with the real-time force data output by the measuring assembly 50 and the size and speed change of the inner diameter of the shrinkage, the dynamic relationship diagram between the inner diameter and the force of the pipe 70 to be measured can be obtained through data summary and processing.

[0076] It should be noted that the above embodiments can be freely combined according to needs. The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can still be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A device for measuring the shrinkage and covering force of a heat shrinkable tube, characterized in that: include: A casing member, wherein the casing member is hollow to form a rotating cavity, and a plurality of transmission hole groups are formed on the casing member; A plurality of transmission members, each of which is arranged to pass through the transmission hole group, and each of which is provided with a contact member at one end extending out of the transmission hole group, and the contact member is used to contact the pipe to be tested; A first rotating member, one end of which is disposed in the rotating cavity and is correspondingly connected to the plurality of transmission members; A measuring component, the measuring component is arranged on one end of the first rotating member away from the rotating cavity, and the measuring component is used to measure the rotation data of the rotating shaft; A data processing system is used to receive the rotation data of the measuring component and process the rotation data to obtain the shrinkage wrapping force data of the pipe to be measured.

2. The device for measuring shrinkage and covering force of a heat shrinkable tube according to claim 1, characterized in that: The measuring assembly includes a torque measuring device and a linear speed measuring device; The torque measuring device is disposed on an end of the first rotating member away from the rotating chamber, and the torque measuring device is used to measure the rotation torque of the rotating shaft; The linear velocity measuring device is arranged on the outer peripheral side of the first rotating member, and is used to measure and record the rotation speed and rotation thread of the first rotating member.

3. The device for measuring shrinkage and covering force of a heat shrinkable tube according to claim 2, characterized in that: The linear velocity measuring device includes a linear velocity measuring instrument and a transmission wheel. The linear velocity measuring instrument and the transmission wheel are connected via a second rotating member. The transmission wheel contacts and abuts against the outer peripheral side of the first rotating member so that the rotation of the first rotating member can drive the second rotating member to rotate, thereby enabling the linear velocity measuring instrument to measure the rotation speed and rotation thread of the first rotating member.

4. The device for measuring the shrinkage and covering force of a heat shrinkable tube according to any one of claims 1 to 3, characterized in that: The contact member is rotatably arranged on the transmission member, and a contact arc surface is arranged on the contact member, and the contact arc surface corresponds to the inner wall of the pipe to be tested.

5. The device for measuring shrinkage and covering force of a heat shrinkable tube according to claim 4, characterized in that: The plurality of contact arc surfaces are arranged on the same plane.

6. The device for measuring shrinkage and covering force of a heat shrinkable tube according to claim 5, characterized in that: The transmission hole groups each include two transmission holes, and the transmission member passes through the two transmission holes in sequence.

7. The device for measuring shrinkage and covering force of a heat shrinkable tube according to claim 6, characterized in that: The cross section of the transmission member is a polygon; The transmission holes are all sleeved with guide sleeves, and the guide sleeves are matched with the rotating parts.

8. The device for measuring the shrinkage and covering force of a heat shrinkable tube according to any one of claims 5 to 7, characterized in that: The transmission member and the first rotating member are connected via gear transmission.

9. A measurement method, applied to the device for measuring the shrinkage and covering force of a heat shrinkable tube as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S10, sleeve the pipe to be tested on the outside of the sleeve shell, and adjust the contact members so that the contact members are all in contact with the inner wall of the pipe to be tested; S20, heating the pipe to be tested to cause the pipe to be tested to shrink; S30, measuring the shrinkage and covering force generated by the tested pipe after heating.

10. The measuring method according to claim 9, characterized in that: The step S30 further comprises: S31. Measure and obtain torque data, rotation speed and rotation thread of the first rotating member through a measuring component. S32, according to the relationship M=FL, the contraction force of the pipe to be measured can be obtained as F=M / L, wherein M is the torque of the first rotating member in the measuring assembly, and L is the radius of the first rotating member in the measuring assembly; The inner diameter shrinkage distance of the pipe to be tested is equal to the rotating thread; S33, comprehensively processing the real-time data of the contraction force of the pipe to be tested and the real-time data of the inner diameter contraction distance of the pipe to be tested to obtain a dynamic relationship diagram between the inner diameter contraction distance and the force of the pipe to be tested.

Images