A vibration test fixing device for vertical welded adiabatic gas cylinder

Abstract

The utility model discloses a kind of for vertical welding heat-insulated gas cylinder's vibration test fixing device, device includes base, frame body, top seat and sensing part, base is fixed to test platform, frame body is vertically arranged in base and forms the space containing heat-insulated gas cylinder, heat-insulated gas cylinder bottom is set in base, multiple elastic positioning parts are configured in frame body along height direction, and gas cylinder outer wall is pressed to limit radial displacement.Top seat is fixed on the upper end of frame body, and the positioning pipe of middle part is detachably sleeved on gas cylinder gas pipe, limit axial displacement and top shake;Sensing part is respectively configured in base, frame body and positioning pipe, and the acceleration, pressure and displacement data of gas cylinder in vibration process are collected.The device is fixed by radial elastic clamping and axial positioning dual, effectively suppresses the displacement and shake of the heat-insulated gas cylinder to be measured in vibration test, when testing, excitation force can be accurately acted on the heat-insulated gas cylinder to be measured, reduce energy loss and interference signal, guarantee test data real and reliable.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for vibration testing of insulated gas cylinders, specifically to a vibration testing fixing device for vertically welded insulated gas cylinders. Background Technology

[0002] Currently, in the field of vibration testing of vertically welded insulated gas cylinders, the common testing method is to place the cylinder under test on top of a vibration table and then start the vibration test. However, existing vibration tables generally lack a stable fixing structure for the cylinder under test, which has become a key issue restricting the accuracy and safety of the test. Because the cylinder under test is cylindrical, its special arc shape makes it difficult to maintain stability during placement. During vibration testing, the cylinder is prone to displacement and tipping. This instability not only leads to deviations in test data, affecting the accurate assessment of the actual vibration resistance performance of the cylinder, but may also cause equipment damage or even safety accidents. Therefore, it is crucial to develop a dedicated positioning structure for vertically welded insulated gas cylinder vibration testing to effectively address the defects and shortcomings of existing technologies and ensure the reliability and safety of vibration testing. Utility Model Content

[0003] To address the problems existing in the prior art, the purpose of this utility model is to provide a vibration test fixing device for vertical welded insulated gas cylinders. Through the dual fixing of radial elastic clamping and axial positioning, it solves the problems of gas cylinders easily rolling, shifting, and shaking in traditional devices. It integrates multi-dimensional sensing detection, is compatible with gas cylinders of different specifications, and is modular and detachable, thereby improving test stability and data accuracy, simplifying operation, and reducing costs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A vibration testing fixture for vertically welded insulated gas cylinders, comprising: A base fixed to the test platform; A frame is vertically arranged on the base, and the frame is configured to accommodate an insulating gas cylinder. The bottom of the insulating gas cylinder is located on the base. The frame is provided with a plurality of elastic positioning parts along its height direction. The elastic positioning parts press against the outer wall of the insulating gas cylinder to limit the radial displacement of the insulating gas cylinder. The top seat is fixed to the upper end of the frame. A positioning tube is provided in the middle of the top seat. The positioning tube is detachably fitted onto the gas outlet tube formed on the top of the insulated gas cylinder to limit the axial displacement and top shaking of the insulated gas cylinder. The sensing unit is respectively disposed on the base, the frame and the positioning tube, and is used to collect the acceleration, pressure and displacement data of the adiabatic gas cylinder when the test platform is working.

[0005] According to one example, the base includes a first square seat and a plurality of mounting holes spaced apart along the circumferential direction of the first square seat. The first square seat is bolted to the test platform through the mounting holes. First sleeves are provided at the four corners of the first square seat, and the first sleeves are detachably connected to the lower end of the frame.

[0006] According to one example, the frame includes a plurality of vertical tubes spaced apart along the circumferential direction of the base, the middle positions of the plurality of vertical tubes being connected by a support frame, one end of the elastic positioning part being fixed to the inner sidewall of the vertical tube, and the other end extending toward and abutting against the outer wall of the insulating gas cylinder, the other end of each of the plurality of elastic positioning parts collectively defining a clamping space for cooperating with the insulating gas cylinder.

[0007] According to one example, the top seat includes a second square seat and second sleeves provided at the four corners of the second square seat. The second sleeves are detachably connected to the upper end of the frame. A cross-shaped support is provided inside the second square seat, and the positioning tube is fixed at the middle position of the cross-shaped support.

[0008] According to one example, the sensing unit includes: A displacement sensor is provided, which is installed on two opposite side walls of the frame, with its sensing end facing the outer wall of the insulated gas cylinder, and is used to monitor the radial displacement of the insulated gas cylinder during vibration. An accelerometer is provided, which is respectively disposed on the base and the top seat, for collecting vibration acceleration signals at the top and bottom of the insulated gas cylinder; A pressure sensor is disposed on the inner wall of the positioning tube, and its sensing end abuts against the outlet pipe of the insulated gas cylinder to detect the axial pressure change of the outlet pipe of the insulated gas cylinder.

[0009] According to one example, the resilient positioning part includes: A fixing rod, one end of which is fixed to the inner wall of the frame; A sleeve rod is slidably disposed at the other end of the fixed rod, and an arc-shaped plate is provided at the free end of the sleeve rod, the outer surface of which cooperates with the outer wall of the insulated gas cylinder. An elastic element, disposed inside the sleeve rod, is used to provide elastic resistance to the arc-shaped plate toward the insulated gas cylinder.

[0010] According to one example, the elastic element includes a guide rod, one end of which is fixed to the inner wall of the free end of the sleeve rod, and the other end of which extends axially and passes through a guide hole formed at the other end of the fixed rod. A spring is provided on the circumferential wall of the guide rod, and the two ends of the spring abut against the end wall of the sleeve rod and the end face of the fixed rod, respectively.

[0011] According to one example, a limiting plate is also provided at one end of the guide rod extending out of the guide hole, the diameter of the limiting plate being larger than the diameter of the guide hole, so as to limit the maximum travel of the guide rod relative to the fixed rod.

[0012] According to one example, the outer wall of the fixing rod is provided with a plurality of first insertion holes spaced apart along its length, and the outer wall of the sleeve rod is provided with a second insertion hole. The second insertion hole is connected to one of the first insertion holes by a screw to fix the clamping distance of the elastic positioning part.

[0013] According to one example, the base is arranged parallel to the top seat.

[0014] This utility model has the following advantages: This invention utilizes radial and axial positioning structures to constrain and protect insulated gas cylinders during vibration testing. The base is assembled with the vibration table via mounting holes. The elastic positioning section on the frame provides fourfold radial constraint, which, combined with the contact between the arc-shaped plate and the outer wall of the gas cylinder, restricts the cylinder's radial displacement and rolling. The positioning tube on the top seat is fitted into the gas cylinder's outlet pipe, forming an axial limit. This composite structure of radial constraint and axial positioning not only ensures that the vibration excitation force acts on the gas cylinder body without loss, reducing interference signals and guaranteeing the accuracy and reliability of test data, but also prevents the cylinder from tipping over and provides targeted protection for the top of the cylinder, reducing the risk of equipment damage and safety accidents.

[0015] The detachable insertion structure of the frame's uprights, the first sleeve of the base, and the second sleeve of the top mount, combined with the flexible positioning part, allows for quick placement and removal of insulated gas cylinders and flexibly adapts to gas cylinders of various diameters, overcoming the limitation of traditional fixing devices that only accommodate one type of cylinder. The triangular support plate of the top mount, the support crossbeam of the base, and the support square frame of the frame enhance the overall structural rigidity from multiple directions, ensuring stability under high-frequency vibration. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the vibration test fixing device for vertically welded insulated gas cylinders according to this utility model.

[0017] Figure 2 This is an exploded perspective view of the vibration testing fixture of this utility model.

[0018] Figure 3This is an exploded perspective view of the top seat, pressure sensor, and insulated gas cylinder of this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the base of this utility model.

[0020] Figure 5 This is a three-dimensional structural diagram of the frame of this utility model.

[0021] Figure 6 This is a three-dimensional structural diagram of the top seat of this utility model.

[0022] Figure 7 This is a three-dimensional structural diagram of the insulated gas cylinder of this utility model.

[0023] Figure 8 This is a three-dimensional structural diagram of the elastic positioning part of this utility model.

[0024] Figure 9 This is a three-dimensional sectional view of the elastic positioning part of this utility model.

[0025] Wherein, 1 is the base, 101 is the first square seat, 101a is the mounting hole, 102 is the first sleeve, 103 is the first supporting crossbeam, 2 is the frame body, 201 is the elastic positioning part, 201a is the fixing rod, 201a1 is the guide hole, 201a2 is the first insertion hole, 201b is the sleeve rod, 201b1 is the arc-shaped plate, 201b2 is the second insertion hole, 201b3 is the screw, 201c is the elastic element, and 201c1 is the guide rod. 201c2 is a spring, 201c3 is a limiting plate, 202 is a vertical pipe, 202a is a second supporting horizontal frame, 203 is a supporting square frame, 3 is a top seat, 301 is a positioning tube, 302 is a second square seat, 303 is a second sleeve, 304 is a cross support frame, 305 is a support plate, 4 is an insulating gas cylinder, 401 is an outlet pipe, 5 is a sensing unit, 501 is a displacement sensor, 502 is an acceleration sensor, and 503 is a pressure sensor. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] Reference Figure 1 and Figure 2This document illustrates a specific embodiment of a vibration testing fixture for vertically welded insulated gas cylinders. The fixture mainly comprises a top seat 3, a frame 2, and a base 1 arranged sequentially from top to bottom, forming a vertical frame structure. This structure is used to provide omnidirectional positioning and constraint for the vertically welded insulated gas cylinder 4 during the vibration test. It can effectively prevent the gas cylinder from shifting, tipping, or shaking under high-frequency vibration, ensuring the safety and stability of the test process. It can also ensure that the vibration excitation is accurately applied to the gas cylinder body. Furthermore, it is adaptable to the testing needs of various gas cylinder specifications, providing a reliable guarantee for the acquisition of vibration test data.

[0028] In an embodiment not shown, the test platform is an electromagnetic vibration table, model DC-20000-200. The vibration table mainly includes a base, a horizontal vibration table surface, an electromagnetic drive system, and a control box. The vibration table surface has evenly distributed connection holes for mating with the base 1. The electromagnetic drive system can output vibration excitation with preset frequency and acceleration to meet the dynamic testing requirements of the vibration test of the vertical welded insulated gas cylinder 4.

[0029] Reference Figure 1 and Figure 4 The base 1 is fixed to the test platform surface. The base 1 includes a horizontally arranged first square seat 101, with a first supporting crossbeam 103 at each of its four inner corners. The first supporting crossbeams 103 are horizontally arranged and perpendicular to each other, forming a support structure. Multiple mounting holes 101a are spaced apart along the circumferential edge of the first square seat 101. The mounting holes 101a are countersunk holes. The first square seat 101 is bolted to the test platform surface through these countersunk holes. The countersunk holes allow the head of the connecting bolt to be fully embedded within the hole, preventing the bolt head from protruding from the top surface of the first square seat 101 and affecting the support stability of the gas cylinder bottom, and also preventing the bolt head from interfering with the installation of other components, ensuring that the base 1 and the test platform are flat and stable. Simultaneously, a first sleeve 102 is provided at each of the four corners of the first square seat 101. The first sleeve 102 extends vertically and is used for detachable connection with the lower end of the frame 2.

[0030] Reference Figure 1 , 5The frame 2 is vertically arranged on the base 1, and the frame 2 is configured to accommodate the insulating gas cylinder 4. The bottom of the insulating gas cylinder 4 is placed on the base 1. The frame 2 includes four vertical pipes 202 evenly spaced along the circumference of the first square seat 101 of the base 1. The middle positions of the four vertical pipes 202 are connected by horizontally arranged support frames 203. Second support crossbeams 202a are provided at the four inner corners of the support frame 203. The second support crossbeams 202a are horizontally arranged and perpendicular to each other, forming a support structure. The four vertical pipes 202 enclose a space to accommodate the insulating gas cylinder 4 to be tested. After the insulating gas cylinder 4 is inserted through the upper opening of the frame 2, its bottom is supported on the first square seat 101 of the base 1. The number of vertical pipes 202 can be configured as needed, such as three, six, nine, etc.

[0031] Reference Figure 1 and Figure 5 Multiple elastic positioning parts 201 are spaced apart along the height direction inside the frame 2. One end of each elastic positioning part 201 is fixed to the inner wall of the riser 202, and the other end extends towards the outer wall of the insulation cylinder 4 and elastically abuts against it. The abutting ends of the four elastic positioning parts 201 at the same height together define an annular clamping space that fits the outer wall of the insulation cylinder 4. An arc-shaped plate 201b1 is provided at the free end of the elastic positioning part 201. The inner wall of the arc-shaped plate 201b1 abuts against the outer surface of the insulation cylinder 4. Through the two sets of elastic positioning parts 201 arranged at the upper and lower parts of the inner side of the riser 202, multiple radial constraints are formed from different height positions of the insulation cylinder 4, which can effectively limit the radial displacement and rolling of the insulation cylinder 4 during the vibration test. When the insulated gas cylinder 4 is inserted from the upper part of the frame 2 and placed on the base 1, the arc plate 201b1 is squeezed by the outer wall of the gas cylinder, which drives the elastic positioning part 201 to automatically extend and retract radially until it presses against the outer wall of the gas cylinder, so as to achieve fine adjustment of the radial clamping distance within the range of 0-50mm. It can adapt to insulated gas cylinders 4 of different diameters without manual adjustment.

[0032] In this design, the lower ends of the four uprights 202 of the frame 2 are respectively inserted into the first sleeves 102 at the four corners of the first square base 101 of the base 1, forming a detachable rigid connection. In addition, the cross-sectional shape of the first sleeves 102 and the uprights 202 is set to be square to improve the stability of the connection between the frame 2 and the base 1.

[0033] Reference Figure 8 and Figure 9The figure illustrates a specific embodiment of the elastic positioning part 201. As shown, the elastic positioning part 201 mainly includes a fixing rod 201a, a sleeve rod 201b, and an elastic element 201c. The fixing rod 201a has a hollow structure, with one end fixed to the inner wall of the riser 202 of the frame 2, and the fixing rod 201a extends radially along the riser 202 and toward the outer wall of the insulation gas cylinder 4. The sleeve rod 201b also has a hollow structure and is slidably sleeved on the other end of the fixing rod 201a. An arc-shaped plate 201b1 is provided at the free end of the sleeve rod 201b away from the fixing rod 201a, and the outer surface of the arc-shaped plate 201b1 cooperates with the outer wall of the insulation gas cylinder 4.

[0034] An elastic element 201c is disposed inside the sleeve rod 201b to provide elastic resistance to the arc-shaped plate 201b1 towards the insulating gas cylinder 4. It includes a guide rod 201c1 and a spring 201c2. One end of the guide rod 201c1 is connected to the end wall of the free end of the sleeve rod 201b, and its other end extends axially along the fixed rod 201a and passes through a guide hole 201a1 formed at the other end of the fixed rod 201a, forming an axial guiding structure. The spring 201c2 is sleeved on the circumferential wall of the guide rod 201c1, and both ends of the spring 201c2 are in close contact with the inner end wall of the sleeve rod 201b and the end face of the fixed rod 201a, respectively. When the sleeve rod 201b slides relative to the fixed rod 201a, the spring 201c2 can generate an elastic force through compression or reset, driving the arc-shaped plate 201b1 to always press against the outer wall of the insulating gas cylinder 4.

[0035] A limiting plate 201c3 is also provided at one end of the guide rod 201c1 that extends out of the guide hole 201a1. The diameter of the limiting plate 201c3 is larger than the diameter of the guide hole 201a1. It can abut against the end face of the fixed rod 201a when the sleeve rod 201b slides outward to its maximum stroke, thereby limiting the maximum travel of the guide rod 201c1 relative to the fixed rod 201a.

[0036] The outer wall of the fixing rod 201a is provided with a plurality of first insertion holes 201a2 spaced apart along its length. The spacing between two adjacent first insertion holes 201a2 is set according to the different sizes of the insulating gas cylinder 4. The outer wall of the sleeve rod 201b is provided with a second insertion hole 201b2. When the arc plate 201b1 abuts against the outer wall of the insulating gas cylinder 4 in a suitable position, the screw 201b3 can be passed through the second insertion hole 201b2 and inserted into the corresponding first insertion hole 201a2 to achieve relative positioning of the fixing rod 201a and the sleeve rod 201b, thereby locking the clamping distance of the elastic positioning part 201 and avoiding the clamping position shift caused by the elastic deformation of the spring 201c2 during vibration.

[0037] Reference Figure 2 and Figure 6The top seat 3 is horizontally fixed to the upper end of the frame 2 and is arranged parallel to the base 1, together forming a symmetrical vertical frame. The top seat 3 includes a horizontally arranged second square seat 302. Each of the four corners of the second square seat 302 is provided with a second sleeve 303, and the second sleeve 303 corresponds one-to-one with the vertical pipe 202 at the upper end of the frame 2. The top seat 3 and the frame 2 are detachably rigidly connected by insertion.

[0038] Triangular support plates 305 are provided at the connection between the bottom of the second square base 302 and the second sleeve 303. Utilizing the stability of the triangular structure, the torsional resistance and load-bearing stiffness of the connection between the second square base 302 and the second sleeve 303 are enhanced, effectively reducing local deformation of the top base 3 during high-frequency vibration transmission. Simultaneously, a cross-shaped support frame 304 is configured inside the second square base 302, arranged along the diagonal direction of the second square base 302, with a positioning tube 301 coaxially positioned at its center. The inner diameter of the positioning tube 301 matches the outer diameter of the outlet pipe 401 at the top of the insulated gas cylinder 4, and it is detachably fitted onto the outside of the outlet pipe 401. Through radial contact, it limits the top of the insulated gas cylinder 4, thereby restricting axial displacement and top swaying of the cylinder, forming a double constraint with the radial elastic positioning of the frame 2. First, insert the insulated gas cylinder 4 to be tested into the clamping space through the opening at the top of the frame 2. The bottom is supported on the first square seat 101 of the base 1. Radial pre-fixing is completed by the elastic positioning part 201. Then, insert and fix the second sleeve 303 of the top seat 3 into the corresponding vertical tube 202 of the frame 2, so that the positioning tube 301 is fitted into the gas cylinder outlet pipe 401, and finally the overall fixation of the insulated gas cylinder 4 to be tested is completed.

[0039] Both the base 1 and the top seat 3 are square structures, facilitating the regular layout of components such as the first sleeve 102, the riser 202, the second sleeve 303, the internal cross support 304, and the elastic positioning part 201, ensuring uniform force distribution across the frame. During use, simply disassembling the top seat 3 allows for quick insertion of the insulation cylinder 4 into the clamping space, followed by the insertion and engagement of the sleeve and riser 202 to complete the overall assembly. During testing, the combined radial clamping of the arc plate 201b1 and the axial constraint of the positioning tube 301 effectively prevents the insulation cylinder 4 from rolling, shifting, or swaying at the top, ensuring the cylinder stably withstands vibration testing under controlled conditions and guaranteeing accurate transmission of vibration excitation and reliable test data.

[0040] Return to reference Figure 1-3The sensing units 5 are respectively disposed on the base 1, the frame 2, and the positioning tube 301, and are used to collect the acceleration, pressure, and displacement data of the insulated gas cylinder 4 when it is working on the test platform. The sensing unit 5 includes a displacement sensor 501, an acceleration sensor 502, and a pressure sensor 503. The displacement sensor 501 is a Keyence IL-600 laser displacement sensor, which is symmetrically arranged on the side walls of the two opposite vertical tubes 202 of the frame 2. Its sensing end faces the outer wall of the insulated gas cylinder 4 and maintains a preset detection distance. It can monitor the radial displacement offset of the insulated gas cylinder 4 during vibration, capture the radial sway amplitude of the gas cylinder under high-frequency vibration, and determine the constraint effectiveness of the radial positioning structure. Accelerometer 502 is a high-precision accelerometer based on PCB 356A11, fixedly mounted on the first square base 101 of base 1 and the second square base 302 of top base 3. The sensing end of the sensor corresponds to the bottom and top of the insulated gas cylinder 4, enabling synchronous acquisition of vibration acceleration signals from the top and bottom of the cylinder to evaluate the transmission efficiency and uniformity of vibration excitation within the cylinder body. Pressure sensor 503 is a Honeywell 26PC series pressure sensor, embedded in the inner wall of positioning tube 301 at the corresponding position. The sensing end abuts against the outer wall of the outlet pipe 401 of the insulated gas cylinder 4, detecting the axial pressure change of the outlet pipe 401 in real time during vibration, preventing damage to the cylinder body due to excessive clamping.

[0041] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention should be considered equivalent substitutions and are included within the protection scope of the present invention. The embodiments described in this disclosure are intended as non-limiting examples, and other embodiments may take various and alternative forms. Furthermore, the drawings are not necessarily to scale and may present simplified expressions of various features of the present disclosure, including, for example, specific dimensions, orientations, positions, and shapes. Details associated with such features will be determined in part by the intended application and usage environment of the described embodiments.

[0042] The detailed description and accompanying drawings are supporting and descriptive of this teaching, but the scope of this teaching is defined only by the claims. While the best mode and some other embodiments for carrying out this teaching have been described in detail, various alternative designs and embodiments exist for practicing the teaching as defined in the appended claims. Furthermore, this disclosure expressly includes combinations and sub-combinations of the elements and features set forth above and below.

Claims

1. A vibration testing fixing device for vertically welded insulated gas cylinders, characterized in that, include: A base fixed to the test platform; A frame is vertically arranged on the base, and the frame is configured to accommodate an insulating gas cylinder. The bottom of the insulating gas cylinder is located on the base. The frame is provided with a plurality of elastic positioning parts along its height direction. The elastic positioning parts press against the outer wall of the insulating gas cylinder to limit the radial displacement of the insulating gas cylinder. The top seat is fixed to the upper end of the frame. A positioning tube is provided in the middle of the top seat. The positioning tube is detachably fitted onto the gas outlet tube formed on the top of the insulated gas cylinder to limit the axial displacement and top shaking of the insulated gas cylinder. The sensing unit is respectively disposed on the base, the frame and the positioning tube, and is used to collect the acceleration, pressure and displacement data of the adiabatic gas cylinder when the test platform is working.

2. The vibration test fixing device according to claim 1, characterized in that, The base includes a first square seat and a plurality of mounting holes spaced apart along the circumferential direction of the first square seat. The first square seat is bolted to the test platform through the mounting holes. A first sleeve is provided at each of the four corners of the first square seat, and the first sleeve is detachably connected to the lower end of the frame.

3. The vibration test fixing device according to claim 1, characterized in that, The frame includes a plurality of vertical tubes spaced apart along the circumferential direction of the base. The middle positions of the plurality of vertical tubes are connected by a support frame. One end of the elastic positioning part is fixed to the inner side wall of the vertical tube, and the other end extends toward and abuts against the outer wall of the insulation gas cylinder. The other end of each of the plurality of elastic positioning parts together defines a clamping space for cooperating with the insulation gas cylinder.

4. The vibration test fixing device according to claim 1, characterized in that, The top seat includes a second square seat and second sleeves at the four corners of the second square seat. The second sleeves are detachably connected to the upper end of the frame. A cross-shaped support is arranged inside the second square seat, and the positioning tube is fixed at the middle position of the cross-shaped support.

5. The vibration test fixing device according to claim 1, characterized in that, The sensing unit includes: A displacement sensor is provided, which is installed on two opposite side walls of the frame, with its sensing end facing the outer wall of the insulated gas cylinder, and is used to monitor the radial displacement of the insulated gas cylinder during vibration. An accelerometer is provided, which is respectively disposed on the base and the top seat, for collecting vibration acceleration signals at the top and bottom of the insulated gas cylinder; A pressure sensor is disposed on the inner wall of the positioning tube, and its sensing end abuts against the outlet pipe of the insulated gas cylinder to detect the axial pressure change of the outlet pipe of the insulated gas cylinder.

6. The vibration test fixing device according to claim 1, characterized in that, The elastic positioning part includes: A fixing rod, one end of which is fixed to the inner wall of the frame; A sleeve rod is slidably disposed at the other end of the fixed rod, and an arc-shaped plate is provided at the free end of the sleeve rod, the outer surface of which cooperates with the outer wall of the insulated gas cylinder. An elastic element, disposed inside the sleeve rod, is used to provide elastic resistance to the arc-shaped plate toward the insulated gas cylinder.

7. The vibration test fixing device according to claim 6, characterized in that, The elastic element includes a guide rod, one end of which is fixed to the inner wall of the free end of the sleeve rod, and the other end of which extends axially and passes through a guide hole formed at the other end of the fixed rod. A spring is provided on the circumferential wall of the guide rod, and the two ends of the spring abut against the end wall of the sleeve rod and the end face of the fixed rod, respectively.

8. The vibration test fixing device according to claim 7, characterized in that, A limiting plate is also provided at one end of the guide rod that extends out of the guide hole. The diameter of the limiting plate is larger than the diameter of the guide hole to limit the maximum travel of the guide rod relative to the fixed rod.

9. The vibration test fixing device according to claim 7, characterized in that, The outer wall of the fixing rod is provided with a plurality of first insertion holes spaced apart along its length, and the outer wall of the sleeve rod is provided with a second insertion hole. The second insertion hole is connected to one of the first insertion holes by a screw to fix the clamping distance of the elastic positioning part.

10. The vibration test fixing device according to claim 1, characterized in that, The base and the top seat are arranged parallel to each other.

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