Pipeline buckling and pressing testing device

Abstract

The utility model provides a pipeline buckling and pressing testing device, and relates to the technical field of pipeline buckling and pressing amount testing. The pipeline buckling test device comprises a first clamping plate, a second clamping plate and a telescopic structure, the first clamping plate and the second clamping plate are oppositely arranged, the first clamping plate is provided with a first concave-convex structure, and the second clamping plate is provided with a second concave-convex structure; concave teeth and convex teeth in the first concave-convex structure correspond to concave teeth and convex teeth on a mandrel of a pipeline to be buckled and pressed respectively; concave teeth and convex teeth in the second concave-convex structure correspond to concave teeth and convex teeth at the crimping end of the crimping machine respectively; the telescopic structure is connected between the first clamping plate and the second clamping plate. According to the device, the first clamping plate capable of simulating the mandrel and the second clamping plate capable of simulating the crimping machine are matched with each other, and the telescopic structure is combined to perform a crimping test on the half-section rubber pipe so as to verify the influence of different crimping amounts on the performance of the rubber pipe; and the actual deformation of the rubber tube can be measured and the deformation state of the rubber tube can be observed through the gap between the first clamping plate and the second clamping plate.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline swaging amount testing, in particular to a pipeline swaging test device. Background Technique

[0002] The cooling pipeline in the automotive pipeline system has a high-pressure resistance requirement, and the pressure it can withstand is as high as 0.7 - 1.5 MPa. Therefore, the cooling pipeline usually needs to have good pressure-bearing capacity and sealing ability.

[0003] The existing cooling pipelines usually use the swaging process for sealing. Specifically, the cooling pipeline includes a rubber hose, an aluminum pipe mandrel, and an aluminum swaging sleeve. Among them, the end of the aluminum pipe mandrel to the shaft body near the end is usually provided with a plurality of annular convex teeth and a plurality of annular concave teeth that are axially spaced and staggered. During swaging and sealing, one end of the mandrel needs to be inserted and connected into the rubber hose first, then the rubber hose is attached to the aluminum pressing piece, and then the swaging end of the swaging machine with concave teeth and convex teeth is used to apply radial pressure outside the aluminum pressing piece, so that the aluminum pressing piece forms an aluminum swaging sleeve, and the rubber hose is pressurized by the deformation of the aluminum swaging sleeve, so that the rubber hose deforms and tightly fits outside the mandrel. At this time, the concave teeth and convex teeth on the mandrel can effectively ensure the connection stability and sealing effect between the mandrel and the rubber hose, thus effectively ensuring the sealing ability of the cooling pipeline.

[0004] In the actual swaging process of the cooling pipeline, the size of the swaging amount of the rubber hose has a very important influence on the sealing effect. If the swaging amount is small, the sealing effect is poor, which will not only cause medium leakage, but also cause the rubber hose and the mandrel to even come off under the axial pulling force of the flowing medium; if the swaging amount is large, the rubber hose will be subjected to too strong a clamping force, and then the rubber hose is likely to rupture under the axial pulling force of the flowing medium, resulting in sealing failure. Therefore, before batch swaging and sealing the cooling pipeline, it is extremely important to verify the influence of different swaging amounts on the performance of the rubber hose.

[0005] Since the deformation processes of the rubber hose and the mandrel are different during swaging, the actual swaging amount of the rubber hose after swaging is usually different from the theoretical swaging amount. Therefore, when verifying the influence of different swaging amounts on the performance of the rubber hose, the actual swaging amount of the rubber hose needs to be measured. However, due to the presence of concave teeth and convex teeth structures on the mandrel, and the structure of the swaging and sealing part of the cooling pipeline is closed, it is difficult to directly measure the actual deformation amount of the rubber hose and observe the deformation state of the rubber hose from the side of the cooling pipeline. Also, since the rubber hose contains fiber materials such as a braided layer, and the mandrel is easy to deform, after swaging is completed, it is difficult to cut out a complete cross-section at the swaging and sealing part of the cooling pipeline. Therefore, even if the cooling pipeline is radially cut, it is difficult to measure the accurate actual deformation amount of the rubber hose, and it is also difficult to directly observe the deformation state of the rubber hose. Content of the Utility Model

[0006] The purpose of the present utility model is to provide a [name of the utility model], so as to alleviate the technical problems existing in the prior art that in a pipeline structure including a mandrel and a rubber hose, such as an automobile cooling pipeline, after the rubber hose is clamped and sealed with the mandrel, it is difficult to measure the actual deformation amount of the rubber hose and directly observe the deformation state of the rubber hose during the process of verifying the influence of different clamping amounts on the performance of the rubber hose.

[0007] In a first aspect, the present utility model provides a pipeline clamping test device, which includes a first clamping plate, a second clamping plate and a telescopic structure;

[0008] The first clamping plate and the second clamping plate are arranged oppositely, and a first concave-convex structure is provided on the side of the first clamping plate facing the second clamping plate, and a second concave-convex structure is provided on the side of the second clamping plate facing the first clamping plate;

[0009] The first concave-convex structure includes a plurality of concave teeth and convex teeth distributed alternately, and the concave teeth and convex teeth in the first concave-convex structure respectively correspond to the concave teeth and convex teeth on the mandrel in the pipeline to be clamped; the second concave-convex structure includes a plurality of concave teeth and convex teeth distributed alternately, and the concave teeth and convex teeth in the second concave-convex structure respectively correspond to the concave teeth and convex teeth on the clamping end of the clamping machine;

[0010] The telescopic structure is connected between the first clamping plate and the second clamping plate, and the telescopic structure can be telescoped to drive the first clamping plate and the second clamping plate to move relatively closer or relatively farther away.

[0011] In an optional embodiment, the telescopic structure includes a screw rod and a nut;

[0012] One of the first clamping plate and the second clamping plate is fixed with the screw rod, and the other is provided with a perforation. After the screw rod passes through the perforation, it is threadedly connected with the nut, and the nut abuts against the side of the first clamping plate facing away from the second clamping plate or the side of the second clamping plate facing away from the first clamping plate.

[0013] In an optional embodiment, the screw rod, the nut and the perforation are all multiple, and the multiple perforations are spaced apart. The multiple screw rods respectively pass through the multiple perforations one by one, and the multiple nuts are threadedly connected with the multiple screw rods one by one.

[0014] In an optional embodiment, the telescopic structure further includes an annular gasket, the gasket is sleeved on the screw rod, and the gasket abuts between the nut and the first clamping plate, or abuts between the nut and the second clamping plate.

[0015] In an optional embodiment, a guide rod is further included, and the guide rod extends along the telescopic direction of the telescopic structure;

[0016] One of the first clamping plate and the second clamping plate is provided with a guiding hole, and the other is fixed with the guiding rod, and the guiding rod is inserted into the guiding hole.

[0017] In an alternative embodiment, both the guiding rod and the guiding hole are plural, and the plural guiding rods are arranged in one-to-one correspondence with the plural guiding holes.

[0018] In an alternative embodiment, the perforation is provided on the first clamping plate, and the guiding rod is fixed on the first clamping plate; the guiding hole is provided on the second clamping plate, and the screw rod is fixed on the second clamping plate.

[0019] In an alternative embodiment, an elastic member is further included. The elastic member is connected between the first clamping plate and the second clamping plate. The elastic member is configured to compress and store energy when the first clamping plate and the second clamping plate approach each other relatively, and elongate and release energy when the first clamping plate and the second clamping plate move away from each other relatively.

[0020] In an alternative embodiment, the elastic members are plural, and the plural elastic members are distributed at intervals.

[0021] In an alternative embodiment, the elastic member is a helical spring.

[0022] The pipe crimping test device provided by the utility model comprises a first clamping plate, a second clamping plate and a telescopic structure; the first clamping plate and the second clamping plate are arranged oppositely, and a first concave-convex structure is arranged on the side of the first clamping plate facing the second clamping plate, and a second concave-convex structure is arranged on the side of the second clamping plate facing the first clamping plate; the first concave-convex structure comprises a plurality of concave teeth and convex teeth distributed alternately, and the concave teeth and convex teeth in the first concave-convex structure respectively correspond to the concave teeth and convex teeth on the mandrel in the pipe to be crimped; the second concave-convex structure comprises a plurality of concave teeth and convex teeth distributed alternately, and the concave teeth and convex teeth in the second concave-convex structure respectively correspond to the concave teeth and convex teeth on the crimping end of the pipe crimper; the telescopic structure is connected between the first clamping plate and the second clamping plate, and the telescopic structure can be telescopic to drive the first clamping plate and the second clamping plate to move relatively closer or relatively farther away. The pipe crimping test device provided by the utility model is used for crimping tests on pipes such as cooling pipes in an automotive pipe system. Specifically, before the test starts, the maximum tensile force of the pipe can be determined according to the application environment and use of the pipe, and the crimping amount of the pipe can be selected at the same time. Then, the rubber hose (i.e., the test sample) in the pipe to be tested is cut axially to form a semi-sectioned rubber hose, and the semi-sectioned rubber hose is extended between the first clamping plate and the second clamping plate, and the semi-sectioned rubber hose is made to fit the first concave-convex structure on the first clamping plate. At this time, a pressing sheet made of metal or alloy can also be placed between the second clamping plate and the semi-sectioned rubber hose, and this pressing sheet is used to simulate the pressing sheet for forming a ferrule in the cooling pipe. Then, the telescopic structure can be driven to shorten according to the selected pipe crimping amount until the shortening amount of the telescopic structure reaches the above-selected pipe crimping amount. After the telescopic structure shortens, it can drive the first clamping plate and the second clamping plate to move relatively closer, so as to compress the above semi-sectioned rubber hose and the pressing sheet. Since the concave teeth and convex teeth in the first concave-convex structure respectively correspond to the concave teeth and convex teeth on the mandrel in the pipe to be crimped, and the concave teeth and convex teeth in the second concave-convex structure respectively correspond to the concave teeth and convex teeth on the crimping end of the pipe crimper, after the first clamping plate and the second clamping plate compress the semi-sectioned rubber hose and the pressing sheet, the process of using the pipe crimper to crimp the rubber hose, mandrel and pressing sheet in the cooling pipe can be simulated. After the simulated crimping process is completed, the semi-sectioned rubber hose can also be stretched, so as to measure whether the semi-sectioned rubber hose is pulled off or broken when the tensile force on the semi-sectioned rubber hose reaches the previously determined maximum tensile force of the pipe at this crimping amount, so as to judge the influence of the selected crimping amount on the performance of the rubber hose (if the semi-sectioned rubber hose is pulled off, it indicates that the selected crimping amount is small, and correspondingly, the sealing effect of the crimped pipe is also poor; if the semi-sectioned rubber hose is broken, it indicates that the selected crimping amount is large, and correspondingly, the crimped pipe is prone to cracking, resulting in sealing failure).Since there is also a possibility of deformation in the pressing piece and the first concave-convex structure on the first clamping plate used to simulate the mandrel during the crimping process, the actual deformation amount of the half-sectioned rubber hose may be different from the selected crimping amount. However, due to the spaced arrangement of the first clamping plate and the second clamping plate, at this time, the actual deformation amounts of the half-sectioned rubber hose, the pressing piece, and the first concave-convex structure can be measured separately from the side of the pipeline crimping test device, so as to measure the actual crimping amount of the half-sectioned rubber hose. At the same time, the deformation state of the surface of the half-sectioned rubber hose can also be visually observed, such as whether there are damages such as cracks on the surface of the half-sectioned rubber hose. It should be noted that when it is necessary to determine the influence of different crimping amounts on the performance of the rubber hose, or when it is necessary to determine the optimal crimping amount of the cooling pipeline, the first selected crimping amount can be the theoretical crimping amount calculated based on the various dimensions of the pipeline. Subsequently, multiple crimping amount values that fluctuate above and below the above-mentioned theoretical crimping amount can be selected, and the above-mentioned simulation crimping and tensile tests are respectively repeated based on the above-mentioned multiple selected crimping amount values, so as to verify the influence of different crimping amounts on the performance of the rubber hose and find the optimal crimping amount of the cooling pipeline from them. It can be seen that the pipeline crimping test device provided by the present invention can convert the closed crimping structure of the existing cylindrical pipeline into a planar structure for simulation, which is convenient to observe the compression situation of the rubber hose from the side after the crimping test, and there is no need to radially cut the pipeline.

[0023] Compared with the prior art, the pipeline crimping test device provided by the present invention can cooperate with the first clamping plate capable of simulating the mandrel and the second clamping plate simulating the crimping machine, and combined with the telescopic structure, the half-sectioned rubber hose can be crimped and tested to verify the influence of different crimping amounts on the performance of the rubber hose, and the actual deformation amount of the rubber hose and the deformation state of the rubber hose can be measured through the gap between the first clamping plate and the second clamping plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of the pipeline crimping test device provided by the embodiment of the present invention;

[0026] Figure 2 It is a side view of the pipeline crimping test device provided by the embodiment of the present invention;

[0027] Figure 3 It is a schematic structural diagram of the first clamping plate provided by the embodiment of the present invention;

[0028] Figure 4Schematic diagram of the structure of the second clamping plate provided by the embodiment of the present utility model.

[0029] Icon: 1 - first clamping plate; 10 - first concave-convex structure; 2 - second clamping plate; 20 - second concave-convex structure; 3 - telescopic structure; 30 - screw rod; 31 - nut; 32 - gasket; 4 - guide rod; 5 - elastic member. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0032] The following will describe in detail some implementation manners of the present utility model with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0033] Embodiment:

[0034] As Figures 1 - 4 shown, the pipeline clamping test device provided in this embodiment includes a first clamping plate 1, a second clamping plate 2, and a telescopic structure 3; the first clamping plate 1 and the second clamping plate 2 are arranged oppositely, and a first concave-convex structure 10 is provided on the side of the first clamping plate 1 facing the second clamping plate 2, and a second concave-convex structure 20 is provided on the side of the second clamping plate 2 facing the first clamping plate 1; the first concave-convex structure 10 includes a plurality of concave teeth and convex teeth distributed alternately, and the concave teeth and convex teeth in the first concave-convex structure 10 respectively correspond to the concave teeth and convex teeth on the mandrel in the pipeline to be clamped; the second concave-convex structure 20 includes a plurality of concave teeth and convex teeth distributed alternately, and the concave teeth and convex teeth in the second concave-convex structure 20 respectively correspond to the concave teeth and convex teeth on the clamping end of the clamping machine; the telescopic structure 3 is connected between the first clamping plate 1 and the second clamping plate 2, and the telescopic structure 3 can be telescoped to drive the first clamping plate 1 and the second clamping plate 2 to move relatively closer or relatively farther away.

[0035] The pipe swaging test device provided in this embodiment is used to perform swaging tests on pipes such as cooling pipes in an automotive pipe system. Specifically, before the test begins, the maximum tensile force of the pipe can be determined according to the application environment and use of the pipe. At the same time, the swaging amount of the pipe is selected. Then, the rubber hose (i.e., the test sample) in the pipe to be tested is cut axially to form a half-sectioned rubber hose. The half-sectioned rubber hose is then inserted between the first clamping plate 1 and the second clamping plate 2, and the half-sectioned rubber hose is made to fit with the first concave-convex structure 10 on the first clamping plate 1. At this time, a pressing plate made of metal or alloy can also be placed between the second clamping plate 2 and the half-sectioned rubber hose. This pressing plate is used to simulate the pressing plate for forming a ferrule in the cooling pipe.

[0036] Subsequently, the telescopic structure 3 can be driven to shorten according to the selected pipe swaging amount until the shortening amount of the telescopic structure 3 reaches the above-selected pipe swaging amount. After the telescopic structure 3 shortens, it can drive the first clamping plate 1 and the second clamping plate 2 to move relatively closer, thereby compressing the above half-sectioned rubber hose and the pressing plate. Since the concave teeth and convex teeth in the first concave-convex structure 10 respectively correspond to the concave teeth and convex teeth on the mandrel in the pipe to be swaged, and the concave teeth and convex teeth in the second concave-convex structure 20 respectively correspond to the concave teeth and convex teeth on the swaging end of the swaging machine, after the first clamping plate 1 and the second clamping plate 2 compress the half-sectioned rubber hose and the pressing plate, the process of using a swaging machine to swage the rubber hose, mandrel, and pressing plate in the cooling pipe can be simulated.

[0037] After the simulated swaging process is completed, the half-sectioned rubber hose can also be stretched, so as to measure whether the half-sectioned rubber hose is pulled off or broken when the tensile force on the half-sectioned rubber hose reaches the previously determined maximum tensile force of the pipe at this swaging amount, thereby judging the influence of the selected swaging amount on the performance of the rubber hose (if the half-sectioned rubber hose is pulled off, it indicates that the selected swaging amount is small, and correspondingly, the sealing effect of the swaged pipe is also poor; if the half-sectioned rubber hose is broken, it indicates that the selected swaging amount is large, and correspondingly, the swaged pipe is prone to cracking, resulting in sealing failure).

[0038] Since the pressing plate and the first concave-convex structure 10 on the first clamping plate used to simulate the mandrel may also deform during the swaging process, the actual deformation amount of the half-sectioned rubber hose may be different from the selected swaging amount. However, since the first clamping plate 1 and the second clamping plate 2 are spaced apart, at this time, the actual deformation amounts of the half-sectioned rubber hose, the pressing plate, and the first concave-convex structure can be measured respectively from the side of the pipe swaging test device, so as to measure the actual swaging amount of the half-sectioned rubber hose. At the same time, the deformation state on the surface of the half-sectioned rubber hose, such as whether cracks or other damages occur on the surface of the half-sectioned rubber hose, can also be directly observed.

[0039] It should be noted that when it is necessary to determine the influence of different crimping amounts on the performance of the hose, or when it is necessary to determine the optimal crimping amount of the cooling pipeline, the first selected crimping amount can be the theoretical crimping amount calculated based on the dimensions of the pipeline. Subsequently, multiple crimping amount values that fluctuate above and below the above-mentioned theoretical crimping amount can be selected, and the above-mentioned simulated crimping and tensile tests can be repeatedly performed based on the above-mentioned multiple selected crimping amount values, so as to verify the influence of different crimping amounts on the performance of the hose and find the optimal crimping amount of the cooling pipeline therefrom.

[0040] It can be seen that the pipeline crimping test device provided in this embodiment can convert the existing closed crimping structure of the cylindrical pipeline into a planar structure for simulation, which is convenient to observe the compression situation of the hose from the side after the crimping test without radially cutting the pipeline.

[0041] Compared with the prior art, the pipeline crimping test device provided in this embodiment can cooperate with the first clamping plate 1 that can simulate the mandrel and the second clamping plate 2 that simulates the crimping machine, and then combine with the telescopic structure 3 to perform a crimping test on the half-sectioned hose to verify the influence of different crimping amounts on the performance of the hose, and the actual deformation amount of the hose can be measured through the gap between the first clamping plate 1 and the second clamping plate 2 and the deformation state of the hose can be observed.

[0042] It should be noted that the verification method of the optimal crimping amount of existing cooling pipelines of different models is usually as follows: first calculate the theoretical crimping amount of the cooling pipeline, then select multiple floating crimping amounts based on the theoretical crimping amount, and then manufacture corresponding cooling pipelines according to the theoretical crimping amount and the floating crimping amounts respectively. Subsequently, based on the maximum tensile force that the cooling pipeline can withstand, the above-mentioned manufactured pipelines are respectively subjected to a drawing test, and the sealing ability of the cooling pipeline under each crimping amount is judged by the pulling-off or breaking phenomenon of the cooling pipeline.

[0043] However, in the process of first manufacturing corresponding cooling pipelines according to different crimping amounts and then testing the cooling pipelines, it will not only lead to a long test cycle, but also result in a high test cost.

[0044] The pipeline crimping test device provided in this embodiment only needs to insert the half-sectioned hose and the pressing piece in the corresponding cooling pipeline between the first clamping plate 1 and the second clamping plate 2, and then the subsequent crimping test can be carried out, which can effectively improve the test efficiency and reduce the test cost.

[0045] It should also be noted that when conducting a swaging amount test on the rubber hoses in pipelines of different specifications, since the sizes and shapes of the mandrels in pipelines of different specifications and the swaging ends of the swaging machines also correspond differently, the first concave-convex structure 10 and the second concave-convex structure 20 can also be replaced correspondingly. To avoid replacing the first clamping plate 1 and the second clamping plate 2 together and increasing the material cost, in this embodiment, it is preferably that the first concave-convex structure 10 is detachably connected to the first clamping plate 1, and the second concave-convex structure 20 is also detachably connected to the second clamping plate 2.

[0046] Specifically, the first concave-convex structure 10 and the second concave-convex structure 20 can be respectively arranged on the bottom plate, and the bottom plate can be detachably connected to the first clamping plate 1 or the second clamping plate 2 through fasteners such as screws.

[0047] In this embodiment, the telescopic structure 3 can adopt devices such as electric push rods, cylinders, and oil cylinders. To further simplify the structure of the pipeline swaging test device and reduce costs, as Figure 2 shown, in this embodiment, it is preferably that the telescopic structure 3 includes a screw rod 30 and a nut 31; one of the first clamping plate 1 and the second clamping plate 2 is fixed with the screw rod 30, and the other is provided with a through hole. After the screw rod 30 passes through the through hole, it is threadedly connected to the nut 31, and the nut 31 abuts against the side of the first clamping plate 1 facing away from the second clamping plate 2 or the side of the second clamping plate 2 facing away from the first clamping plate 1.

[0048] When using the telescopic structure 3 to shorten to drive the first clamping plate 1 and the second clamping plate 2 to move relatively closer, the nut 31 can be rotated on the screw rod 30. At this time, the nut 31 can be in threaded cooperation with the screw rod 30, pushing the clamping plate that abuts against the nut 31 among the first clamping plate 1 and the second clamping plate 2 to move towards the other clamping plate, so as to realize the relative approach between the first clamping plate 1 and the second clamping plate 2.

[0049] It should be noted that the axial displacement of the nut 31 on the screw rod 30 is the swaging amount during the test. Therefore, by controlling the moving stroke of the nut 31, the compression size between the first clamping plate 1 and the second clamping plate 2 can be adjusted. Thus, the pipeline swaging test device provided in this embodiment can also realize the swaging test with a simple structure, which can effectively simplify the test operation and effectively reduce the test cost.

[0050] When it is necessary to take out the semi-sectioned rubber hose from the first clamping plate 1 and the second clamping plate 2 after the test, the nut 31 can be rotated in the reverse direction on the screw rod 30, so that the nut 31 moves away from the first clamping plate 1 or the second clamping plate 2 that abuts against it. At this time, the first clamping plate 1 and the second clamping plate 2 are no longer restricted by the nut 31 and can move relatively away.

[0051] To improve the abutting stability between the nut 31 and the first clamping plate 1 and the connection stability between the nut 31 and the screw 30, the telescopic structure 3 further includes an annular gasket 32. The gasket 32 is sleeved on the screw 30, and the gasket 32 abuts between the nut 31 and the first clamping plate 1, or abuts between the nut 31 and the second clamping plate 2.

[0052] As Figure 2 shown, in this embodiment, it is preferred that the screw 30 is fixedly connected to the second clamping plate 2, and the nut 31 abuts against the side of the first clamping plate 1 facing away from the second clamping plate 2. Further, the gasket 32 abuts between the nut 31 and the first clamping plate 1.

[0053] As shown in FIGS. 1, Figure 3 and Figure 4 shown, there are multiple screws 30, nuts 31 and perforations, and the multiple perforations are spaced apart. The multiple screws 30 pass through the multiple perforations one by one, and the multiple nuts 31 are threadedly connected to the multiple screws 30 one by one.

[0054] When there are multiple screws 30, nuts 31 and perforations, the extrusion force distribution of the first clamping plate 1 and the second clamping plate 2 on the split rubber hose can be made more balanced, preventing the extrusion force from being too concentrated and causing a deviation between the test crimping effect and the actual crimping effect.

[0055] To further improve the balance of the extrusion force distribution, both the first clamping plate 1 and the second clamping plate 2 can be rectangular or square. Correspondingly, there can be four screws 30, nuts 31 and perforations. The four perforations are located on the periphery of the first concave-convex structure 10 and are distributed in a rectangular or square shape on the first clamping plate 1.

[0056] As Figure 2 and Figure 3 shown, the pipeline crimping test device provided in this embodiment further includes a guide rod 4. The guide rod 4 extends along the telescopic direction of the telescopic structure 3; one of the first clamping plate 1 and the second clamping plate 2 is provided with a guide hole, and the other is fixed with a guide rod 4. The guide rod 4 is inserted into the guide hole.

[0057] The guide rod 4 can guide the relative movement process between the first clamping plate 1 and the second clamping plate 2, effectively ensuring the parallelism between the first clamping plate 1 and the second clamping plate 2, and preventing the relative inclination between the first clamping plate 1 and the second clamping plate 2 from affecting the test results.

[0058] To further prevent the relative inclination between the first clamping plate 1 and the second clamping plate 2 from affecting the test results, there can be multiple guide rods 4 and guide holes, and the multiple guide rods 4 are arranged in one-to-one correspondence with the multiple guide holes.

[0059] In addition, there can be four guide rods 4, and the four guide rods 4 are arranged at the four corners of the first clamping plate 1 in one-to-one correspondence.

[0060] In this embodiment, as Figure 2 and Figure 3 shown, the perforations are provided on the first clamping plate 1, and a guide rod 4 is fixed on the first clamping plate 1; the guide holes are provided on the second clamping plate 2, and a screw rod 30 is fixed on the second clamping plate 2.

[0061] Setting the screw rod 30 and the guide rod 4 on different clamping plates can not only improve the aesthetics of the pipeline crimping test device, but also prevent the weights of the screw rod 30 and the guide rod 4 from affecting the stability of the clamping plates, thereby effectively ensuring the force balance between the first clamping plate 1 and the second clamping plate 2.

[0062] As Figure 2 shown, the pipeline crimping test device provided in this embodiment further includes an elastic member 5. The elastic member 5 is connected between the first clamping plate 1 and the second clamping plate 2. The elastic member 5 is used for compressing and storing energy when the first clamping plate 1 and the second clamping plate 2 approach each other relatively, and stretching and releasing energy when the first clamping plate 1 and the second clamping plate 2 move away from each other relatively.

[0063] During the relative approach movement of the first clamping plate 1 and the second clamping plate 2, the elastic member 5 is compressed and stores energy. At this time, the elastic member 5 can play a damping role, effectively improving the stability of the crimping process.

[0064] Among them, there can be multiple elastic members 5, and the multiple elastic members 5 are distributed at intervals.

[0065] The multiple elastic members 5 can further enhance the damping feeling and improve the stability of the crimping process. At this time, to ensure the force balance between the first clamping plate 1 and the second clamping plate 2, the multiple elastic members 5 can be equally spaced.

[0066] When both the first clamping plate 1 and the second clamping plate 2 are rectangular or square, there can also be four elastic members 5, and the four elastic members 5 are correspondingly distributed at the four corners of the first clamping plate 1 or the second clamping plate 2.

[0067] Among them, the elastic member 5 can be a helical spring. When the elastic member 5 is a helical spring, to improve the stability and orderliness of the telescopic process of the elastic member 5, as Figure 2 shown, the elastic member 5 can be sleeved on the screw rod 30 and abuts between the first clamping plate 1 and the second clamping plate 2.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipeline crimping test device, characterized in that: It comprises a first clamping plate (1), a second clamping plate (2) and a telescopic structure (3); The first clamping plate (1) and the second clamping plate (2) are arranged opposite to each other, and a first concave-convex structure (10) is provided on a side of the first clamping plate (1) facing the second clamping plate (2), and a second concave-convex structure (20) is provided on a side of the second clamping plate (2) facing the first clamping plate (1); The first concave-convex structure (10) comprises a plurality of concave teeth and convex teeth that are staggered, and the concave teeth and convex teeth in the first concave-convex structure (10) correspond respectively to the concave teeth and convex teeth on the core shaft in the pipe to be crimped; the second concave-convex structure (20) comprises a plurality of concave teeth and convex teeth that are staggered, and the concave teeth and convex teeth in the second concave-convex structure (20) correspond respectively to the concave teeth and convex teeth on the crimping end of the crimping machine; The telescopic structure (3) is connected between the first clamping plate (1) and the second clamping plate (2), and the telescopic structure (3) is capable of telescoping to drive the first clamping plate (1) and the second clamping plate (2) to move relatively closer or relatively farther away.

2. The pipeline crimping test device according to claim 1, characterized in that: The telescopic structure (3) comprises a screw rod (30) and a nut (31); One of the first clamping plate (1) and the second clamping plate (2) is fixed with the screw rod (30), and the other is provided with a through hole, and the screw rod (30) is threadedly connected with the nut (31) after passing through the through hole, and the nut (31) abuts against the side of the first clamping plate (1) facing away from the second clamping plate (2) or the side of the second clamping plate (2) facing away from the first clamping plate (1).

3. The pipeline crimping test device according to claim 2, characterized in that: The screw rods (30), nuts (31) and through holes are all multiple, and the multiple through holes are distributed at intervals. The multiple screw rods (30) pass through the multiple through holes one by one, and the multiple nuts (31) are threadedly connected to the multiple screw rods (30) one by one.

4. The pipeline crimping test device according to claim 2, characterized in that: The telescopic structure (3) further comprises an annular gasket (32), wherein the gasket (32) is sleeved on the screw rod (30), and the gasket (32) abuts between the nut (31) and the first clamping plate (1), or abuts between the nut (31) and the second clamping plate (2).

5. The pipeline crimping test device according to claim 2, characterized in that: It also comprises a guide rod (4), wherein the guide rod (4) extends along the telescopic direction of the telescopic structure (3); One of the first clamping plate (1) and the second clamping plate (2) is provided with a guide hole, and the other is fixed with the guide rod (4), and the guide rod (4) is inserted into the guide hole.

6. The pipeline crimping test device according to claim 5, characterized in that: There are multiple guide rods (4) and multiple guide holes, and the multiple guide rods (4) and the multiple guide holes are arranged in a one-to-one correspondence.

7. The pipeline crimping test device according to claim 5, characterized in that: The through hole is provided on the first clamping plate (1), and the guide rod (4) is fixed on the first clamping plate (1); the guide hole is provided on the second clamping plate (2), and the screw rod (30) is fixed on the second clamping plate (2).

8. The pipeline crimping test device according to any one of claims 1 to 7, characterized in that: It also includes an elastic member (5), which is connected between the first clamping plate (1) and the second clamping plate (2), and is used to compress and store energy when the first clamping plate (1) and the second clamping plate (2) are relatively close, and to extend and release energy when the first clamping plate (1) and the second clamping plate (2) are relatively far away.

9. The pipeline crimping test device according to claim 8, characterized in that: There are a plurality of elastic members (5), and the plurality of elastic members (5) are distributed at intervals.

10. The pipeline crimping test device according to claim 9, characterized in that: The elastic member (5) is a coil spring.

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