Two-way tensile test device for compensator

Abstract

The utility model discloses a compensator two-way tensile test device, which comprises a base, an inflation pressure maintaining mechanism, a driving mechanism and a reciprocating arm, the driving mechanism comprises a motor, a driving shaft, a two-way lead screw and a lead screw sliding block, the motor is mounted on the base, an output shaft of the motor is in transmission connection with the driving shaft, and mounting frames are fixedly mounted at two ends of the base. The two bidirectional lead screws are rotationally connected to the two mounting frames respectively and are symmetrically arranged, the driving shaft is in transmission connection with the two bidirectional lead screws through the two bevel gear sets respectively and used for driving the two bidirectional lead screws to rotate synchronously, two threaded sections, opposite in rotation direction, of each bidirectional lead screw are each in threaded connection with a lead screw sliding block, and the lead screw sliding blocks are used for driving the two bidirectional lead screws to rotate synchronously. A reciprocating arm is fixedly connected between the two lead screw sliding blocks at the same end, and the two axial ends of the compensator are installed on the two reciprocating arms respectively. The device is stable and reliable in structure, can apply acting force to the two ends of the compensator at the same time, more truly carries out stretching and compression simulation, and is more real and reliable in test result.

Description

Technical Field

[0001] This utility model relates to the field of compensator measurement technology, and in particular to a bidirectional tensile testing device for compensators. Background Technology

[0002] Pipeline compensators are mainly used to compensate for the thermal expansion and contraction of pipelines caused by temperature changes, playing a crucial role in ensuring the long-term normal operation of pipelines. Among them, metal corrugated compensators, such as the gas pipeline compensator disclosed in patent CN210319013U, include an outer casing, an inner conduit, and an elastic expansion pipe. When selecting a compensator, it is necessary to determine the deformation and compensation amount of each pipe section, and there are minimum requirements for the compensator's service life, especially the maximum number of uses under specific conditions. Tensile tests are required to determine the service life.

[0003] Patent CN 212459249 U discloses a compensator tensile testing device, including a mounting mechanism, a driving mechanism, an inflation and pressure holding mechanism, and a base. The mounting mechanism includes a fixed seat and a reciprocating arm located at both ends. The axial ends of the compensator are respectively mounted on the fixed seat and the reciprocating arm. The fixed seat is fixedly mounted on the base, and the reciprocating arm is movably mounted on the base. The driving mechanism is used to drive the reciprocating arm to move back and forth within a preset range. However, in actual use, the compensator is subjected to tension or compression at both ends simultaneously. In the above-mentioned testing device, one end of the compensator is fixed during the test, and only the other end is subjected to force to simulate tension or compression. This differs from the actual use of the compensator, affecting the test results. Furthermore, since the reciprocating arm is only set on one side of the compensator to apply force, if a large force is applied during the tension or compression process, it may cause structural instability and affect the normal conduct of the test. Utility Model Content

[0004] The purpose of this invention is to provide a bidirectional tensile testing device for compensators to solve the problems existing in the prior art. The device has a stable and reliable structure and can apply forces to both ends of the compensator simultaneously, thus simulating tensile and compression more realistically and providing more reliable test results.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a bidirectional tensile testing device for a compensator, including a base, an inflation and pressure holding mechanism, a drive mechanism, and a reciprocating arm. The drive mechanism includes a motor, a drive shaft, a bidirectional lead screw, and a lead screw slider. The motor is mounted on the base, and the output shaft of the motor is drivenly connected to the drive shaft. Mounting brackets are fixedly mounted at both ends of the base. The two bidirectional lead screws are rotatably connected to the two mounting brackets and are symmetrically arranged. The drive shaft is drivenly connected to the two bidirectional lead screws through two bevel gear sets to drive the two bidirectional lead screws to rotate synchronously. A lead screw slider is threadedly connected to the two threaded sections of each bidirectional lead screw with opposite directions of rotation. A reciprocating arm is fixedly connected between the two lead screw sliders at the same end. The two axial ends of the compensator are respectively mounted on the two reciprocating arms.

[0007] Preferably, both ends of the bidirectional lead screw are rotatably connected to bearing seats via bearings, and the bearing seats are fixedly mounted on the mounting bracket.

[0008] Preferably, the output shaft of the motor is connected to the drive shaft via a coupling.

[0009] Preferably, the bevel gear set includes a first bevel gear and a second bevel gear that are meshed together, the first bevel gear being fixed to the drive shaft and the second bevel gear being fixed to the bidirectional lead screw.

[0010] Preferably, the reciprocating arm and the lead screw slider are fixed together by bolts.

[0011] Preferably, both ends of the drive shaft are rotatably connected to bearing seats via bearings, and the bearing seats are fixedly mounted on the base.

[0012] The present invention achieves the following technical advantages over the prior art:

[0013] The compensator bidirectional tensile testing device provided by this utility model uses a bidirectional lead screw to synchronously drive two reciprocating arms to move in opposite directions or towards each other, which can simultaneously apply force to both ends of the compensator, thereby more realistically simulating tensile and compression, making the test results more realistic and reliable. The reciprocating arms are driven by a symmetrically arranged bidirectional lead screw, making the structure more stable and reliable, ensuring the normal conduct of the test. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the biaxial tensile testing device for the compensator provided by this utility model;

[0016] Figure 2 This is a structural schematic diagram of the compensator bidirectional tensile testing device provided by this utility model from another perspective.

[0017] In the diagram: 1-base, 2-inflation and pressure holding mechanism, 3-drive mechanism, 4-reciprocating arm, 5-motor, 6-drive shaft, 7-double-acting lead screw, 8-lead screw slider, 9-mounting bracket, 10-bevel gear set, 11-compensator, 12-pressure gauge, 13-flange, 14-flange structure. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] The purpose of this invention is to provide a bidirectional tensile testing device for compensators to solve the problems existing in the prior art. The device has a stable and reliable structure and can apply forces to both ends of the compensator simultaneously, so as to more realistically simulate tensile and compression and make the test results more realistic and reliable.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1-2 As shown, this embodiment provides a biaxial tensile testing device for a compensator, including a base 1, an inflation and pressure holding mechanism 2, a drive mechanism 3, and a reciprocating arm 4. The drive mechanism 3 includes a motor 5, a drive shaft 6, a biaxial lead screw 7, and a lead screw slider 8. The motor 5 is mounted on the base 1, and the output shaft of the motor 5 is connected to the drive shaft 6. Mounting brackets 9 are fixedly mounted at both ends of the base 1. The two biaxial lead screws 7 are rotatably connected to the two mounting brackets 9 and are symmetrically arranged. The drive shaft 6 is connected to the two biaxial lead screws 7 through two bevel gear sets 10 to drive the two biaxial lead screws 7 to rotate synchronously. A lead screw slider 8 is threadedly connected to the two threaded sections of each biaxial lead screw 7 with opposite directions of rotation. A reciprocating arm 4 is fixedly connected between the two lead screw sliders 8 at the same end. The two ends of the compensator 11 in the axial direction are respectively mounted on the two reciprocating arms 4.

[0022] In use, the two ends of the compensator 11 are respectively installed on the two reciprocating arms 4. Air is injected into the cavity of the compensator 11 through the air inflation and pressure holding mechanism 2. The motor 5 drives the drive shaft 6 to rotate. The rotation of the drive shaft 6 drives the two bidirectional lead screws 7 to rotate synchronously through the two bevel gear sets 10, thereby driving the two reciprocating arms 4 to move synchronously in opposite directions or towards each other. At the same time, forces are applied to both ends of the compensator, thus performing a more realistic tensile and compression simulation, making the test results more realistic and reliable. The reciprocating arms are driven to move back and forth by the symmetrically set bidirectional lead screws 7, which can apply forces to both sides of the compensator 11 at the same time, making the structure more stable and reliable, and ensuring the normal conduct of the test.

[0023] In this embodiment, the inflation and pressure holding mechanism 2 includes an air pump, a pressure gauge 12, and a pressure balancing buffer tank. The air pump is connected to the cavity of the compensator 11 via a pipeline with a switch valve. The pressure gauge 12 is connected to the pipeline to display the air pressure value in the cavity of the compensator 11 during the test. The inner cavity of the pressure balancing buffer tank is connected to the inner cavity of the compensator 11, and the volume of the inner cavity of the pressure balancing buffer tank is much larger than the volume of the compensator 11. Therefore, during the tensile test of the compensator 11, the pressure change in the compensator 11 is reduced due to the change in its own volume, so that the compensator 11 can be subjected to a tensile test under a near-constant pressure.

[0024] In this embodiment, the compensator 11 is connected to the flange structure 14 on the reciprocating arm 4 via flanges 13 at both ends. The flange structure 14 on the reciprocating arm 4 forms a seal on the end faces of the compensator 11, ensuring that the cavity of the compensator 11 is sealed after the connection. The flange structure 14 on the reciprocating arm 4 is a solid structure, and one of the flange structures 14 has an internal air passage that connects to the cavity of the compensator 11. The inlet of the air passage is connected to an air pump via a pipeline.

[0025] In this embodiment, the two ends of the bidirectional lead screw 7 are rotatably connected to the bearing housing through bearings, and the bearing housing is fixedly installed on the mounting bracket 9 to ensure the installation stability of the bidirectional lead screw 7.

[0026] In this embodiment, the output shaft of the motor 5 is connected to the drive shaft 6 via a coupling, which facilitates disassembly and assembly.

[0027] In this embodiment, the bevel gear set 10 includes a first bevel gear and a second bevel gear that mesh with each other. The first bevel gear is fixed on the drive shaft 6, and the second bevel gear is fixed on the double-acting lead screw 7. The rotational power of the drive shaft 6 is transmitted to the double-acting lead screw 7 through the bevel gear set 10, and the transmission process is stable and reliable.

[0028] In this embodiment, the reciprocating arm 4 and the lead screw slider 8 are fixed by bolts, which facilitates disassembly and assembly.

[0029] In this embodiment, the two ends of the drive shaft 6 are rotatably connected to the bearing housing via bearings, and the bearing housing is fixedly installed on the base 1 to ensure the installation stability of the drive shaft 6.

[0030] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A compensator biaxial tensile testing device comprising a base, an inflation pressure maintaining mechanism, a driving mechanism and a reciprocating arm, characterized in that: The driving mechanism comprises a motor, a driving shaft, bidirectional screws and screw blocks, the motor is installed on the base, the output shaft of the motor is in transmission connection with the driving shaft, the base is fixedly provided with mounting frames at both ends, two bidirectional screws are rotationally connected to the mounting frames and symmetrically arranged, the driving shaft is in transmission connection with the two bidirectional screws through two bevel gear sets, for driving the two bidirectional screws to synchronously rotate, one screw block is threadedly connected to each screw segment with opposite rotation directions of the bidirectional screw, and two screw blocks at the same end are fixedly connected with one reciprocating arm, and the two ends of the compensator are installed on the two reciprocating arms.

2. The compensator biaxial tensile test apparatus according to claim 1, characterized by: Both ends of the bidirectional screw are rotationally connected to the bearing seat through bearings, and the bearing seat is fixedly installed on the mounting frame.

3. The compensator biaxial tensile test apparatus of claim 1, wherein: The output shaft of the motor is connected with the driving shaft through a shaft coupling.

4. The compensator biaxial tensile test apparatus of claim 1, wherein: The bevel gear set comprises a first bevel gear and a second bevel gear in meshing connection, the first bevel gear is fixed on the driving shaft, and the second bevel gear is fixed on the bidirectional screw.

5. The compensator biaxial tensile test apparatus of claim 1, wherein: The reciprocating arm and the screw block are fixedly connected through bolts.

6. The compensator biaxial tensile test apparatus of claim 1, wherein: Both ends of the driving shaft are rotationally connected to the bearing seat through bearings, and the bearing seat is fixedly installed on the base.

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