A multi-scene adaptive spiral corrugated pipe strength detection device and a use method thereof

Abstract

The application relates to the technical field of strength detection, in particular to a multi-scene adaptive spiral corrugated pipe strength detection device and a use method thereof. The device comprises a control box, a lower pressing plate, a hydraulic push rod and a fixing base. The hydraulic push rod is arranged in the middle of the control box, the lower pressing plate is fixedly connected to the bottom end of the hydraulic push rod through a flange plate, guide columns are slidably connected to the periphery of the lower pressing plate, the fixing base is fixedly connected to the bottom end of the guide columns, and a test platform is arranged at the upper end of the fixing base. The test platform comprises a platform bottom plate, spring telescopic rods are arranged at the upper end of the platform bottom plate, platform moving plates are arranged at the moving ends of the spring telescopic rods, protection assemblies are arranged on the two sides of the platform bottom plate, two groups of positioning assemblies are arranged on the upper end of the platform bottom plate, and a synchronous assembly is arranged between the two groups of positioning assemblies. Through the cooperative action of the double rotating rods in the positioning assemblies, the second reset springs and the synchronous assembly, automatic centering and positioning of the spiral corrugated pipe after placement are realized.

Description

Technical Field

[0001] This invention relates to a strength testing device and method for multi-scenario adaptable spiral corrugated pipe, belonging to the field of strength testing technology. Background Technology

[0002] In the field of testing the ring stiffness strength of spiral corrugated pipes (such as plastic corrugated pipes, metal spiral pipes, etc.), existing testing equipment typically includes a press, upper and lower pressure plates, and simple positioning fixtures.

[0003] During testing, the operator needs to manually place the spiral bellows in the center of the lower pressure plate, centering it by visual inspection or using simple blocks. Then, the hydraulic or mechanical pressurization system is activated to apply pressure to the upper pressure plate, and the ring stiffness is calculated by measuring the relationship between the deformation and the pressure.

[0004] However, such traditional devices have many shortcomings in practical applications: First, manual positioning is inefficient and has poor repeatability. When different operators or different batches are tested, it is difficult to keep the initial centering position of the pipe consistent, which directly affects the comparability and accuracy of the test data. Second, during the test, as the pressure increases, the spiral corrugated pipe is prone to lateral slippage, deflection, or even being squeezed out between the pressure plates, resulting in test failure or data distortion. Therefore, it is urgent to improve the strength testing device and usage method of a multi-scenario adaptable spiral corrugated pipe to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a strength testing device and method for multi-scenario adaptable spiral corrugated pipes, in order to solve many shortcomings of traditional devices in practical applications: First, manual positioning is inefficient and has poor repeatability. When different operators or different batches are tested, it is difficult to keep the initial centering position of the pipe consistent, which directly affects the comparability and accuracy of the test data. Second, during the test, as the pressure increases, the spiral corrugated pipe is prone to lateral slippage, deflection, or even being squeezed out between the pressure plates, leading to test failure or data distortion.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A strength testing device and method for a multi-scenario adaptable spiral corrugated pipe includes a control box, a lower pressure plate, a hydraulic push rod, and a fixed base. A hydraulic push rod is installed in the center of the control box. The lower pressure plate is fixedly connected to the bottom end of the hydraulic push rod via flange bolts. Guide columns are slidably connected around the lower pressure plate. A fixed base is fixedly connected to the bottom end of each guide column. A test platform is installed at the upper center of the fixed base. The test platform includes a platform base plate. Spring telescopic rods are installed at the four corners of the upper end of the platform base plate. A platform moving plate is installed at the moving end of each spring telescopic rod. Protective components are installed on both sides of the platform base plate. Two sets of positioning components are installed at the upper end of the platform base plate, and a synchronization component is installed between the two sets of positioning components. Each set of positioning components includes two rotating rods. A positioning roller is rotatably connected between the upper ends of the two rotating rods. A third gear is fixedly connected to the lower end of each rotating rod. Vertical poles are installed on both sides of the lower end of each rotating rod, and a second return spring is installed on the inner side of the upper end of each vertical pole.

[0008] Furthermore, uprights are installed on both sides of the lower end of each of the aforementioned rotating rods, the cross-section of the through hole at the upper end of the upright is T-shaped, and the lower end of the upright is fixedly connected to the platform base plate.

[0009] Furthermore, there are four guide posts, the upper ends of which are fixedly connected to the control box, and the guide posts are parallel to each other.

[0010] Furthermore, the upper part of the test platform is used to place the helical bellows for ring stiffness testing, and the platform moving plate and platform base plate inside the test platform are parallel to the lower pressure plate.

[0011] Furthermore, the platform moving plate includes a flat plate, the side of which has a notch, and a toothed plate is fixedly connected inside the notch, the lateral projection of which is T-shaped.

[0012] Furthermore, the protective component includes an anti-slip bend plate, a rotating shaft is fixedly connected to the corner of the anti-slip bend plate, and connecting rods are rotatably connected to both outer sides of the rotating shaft through a first return spring. The connecting rods are fixedly connected to the platform base plate.

[0013] Furthermore, the synchronization component includes a synchronization toothed belt, with a first gear meshing on the inner sides of both ends of the synchronization toothed belt, and a second gear meshing on the other end of each of the first gears.

[0014] Furthermore, the synchronization component is provided in two sets, and the first gear in either set is rotatably connected to the platform base plate through a centrally located shaft.

[0015] Furthermore, the end of the second gear away from the first gear is set as a smooth rod, and the smooth rod end of the second gear is fixedly connected to the bottom end of the rotating rod. The smooth rod end of the second gear passes through the upright, and the second gear and the upright are rotatably connected by a second return spring.

[0016] Furthermore, it includes the following steps:

[0017] Step 1: Place the spiral bellows to be tested at the top of the test platform. After placement, the positioning roller, under the action of the second reset spring, controls the rotating rod to automatically position the spiral bellows and center it.

[0018] Step 2: Control the hydraulic push rod through the control box to move the lower pressure plate downward. The lower pressure plate first contacts the top of the spiral bellows and presses it down steadily. When the bottom of the spiral bellows contacts the top of the plate, it continues to move down until the plate presses down the spring telescopic rod until it is fully compressed.

[0019] During the pressing process where the bottom end of the spiral bellows contacts the top end of the flat plate, the positioning roller maintains the positioning state of the spiral bellows.

[0020] During the process of pressing the spring telescopic rod down the flat plate to the fully compressed state, the toothed plate contacts the third gear, controls the rotating rod to drive the positioning roller to rotate, and separates from the spiral bellows.

[0021] The two positioning rollers are synchronized through a synchronization component.

[0022] Furthermore, the flat plate drives the U-shaped anti-slip plate to rotate, and the upper end of the U-shaped anti-slip plate is inserted into the openings at both ends of the spiral bellows to prevent the spiral bellows from sliding out between the lower pressure plate and the flat plate during the pressing process.

[0023] Step 3: The pressure plate continues to move downward to complete the ring stiffness test of the spiral bellows. During this process, the control box transmits the downward pressure data to the control center in real time. The control center analyzes the data to complete the test.

[0024] Step 4: After the test is completed, the lower pressure plate is reset under the action of the hydraulic push rod, and the spiral bellows is removed, completing a set of tests.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. This invention achieves automatic centering positioning of the spiral bellows after placement through the synergistic action of the double rotating rods, the second reset spring, and the synchronization component in the positioning assembly. When the platform moving plate is pressed down to the set position, the toothed plate meshes with the third gear to drive the positioning roller to automatically rotate away from the pipe surface. This ensures accurate centering before testing and avoids the positioning component from interfering with pipe deformation or causing jamming during the pressurization process, greatly improving the repeatability and data reliability of the ring stiffness test.

[0027] 2. During the downward pressing of the platform moving plate, the anti-slip bending plate in the protective component of the present invention automatically flips upward and inserts into the openings at both ends of the spiral corrugated pipe with the help of the first reset spring and the rotating shaft. This effectively prevents the pipe from sliding out laterally between the upper and lower pressure plates under high pressure testing. At the same time, the protective component automatically resets after the test is completed, without affecting the picking and putting of the pipe, which significantly enhances the safety and stability of the testing process.

[0028] 3. The complete device of this invention, through the integrated design of control box, hydraulic push rod, guide column and test platform, combined with the buffer and stroke control of spring telescopic rod, realizes the fully automated operation from automatic positioning, anti-slip insertion, pressure test to automatic reset. It can adapt to spiral corrugated pipes of different diameters and wall thicknesses for ring stiffness testing, without the need for manual clamp replacement or repeated adjustments, truly meeting the needs of rapid testing in multiple scenarios, greatly reducing the complexity of operation and improving the testing efficiency. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the test platform structure of the present invention;

[0031] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point B;

[0032] Figure 4 This is a schematic diagram of the installation location structure of the synchronization component of the present invention;

[0033] Figure 5 This is a schematic diagram of the platform moving board structure of the present invention;

[0034] Figure 6 This is a schematic diagram of the protective component structure of the present invention;

[0035] Figure 7 This is a schematic diagram of the mounting position structure of the first reset spring of the present invention;

[0036] Figure 8 This is a schematic diagram of the positioning component structure of the present invention;

[0037] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point C;

[0038] Figure 10 This is a schematic diagram of the synchronization component structure of the present invention;

[0039] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point A in the middle;

[0040] Figure 12 This is a schematic diagram of the placement structure of the spiral corrugated pipe of the present invention.

[0041] In the diagram, 1. Control box; 2. Lower pressure plate; 3. Hydraulic push rod; 4. Guide column; 5. Fixed base; 6. Test platform; 61. Platform moving plate; 611. Flat plate; 612. Notch; 613. Toothed plate; 62. Protective component; 621. Anti-slip bending plate; 622. Connecting rod; 623. First return spring; 624. Rotating shaft; 63. Platform base plate; 64. Positioning component; 641. Rotating rod; 642. Third gear; 643. Upright pole; 644. Positioning roller; 645. Second return spring; 65. Spring telescopic rod; 66. Synchronization component; 661. Synchronization toothed belt; 662. First gear; 663. Second gear; 7. Helical bellows. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] like Figures 1-12As shown, this embodiment provides a strength testing device for a multi-scenario adaptable spiral corrugated pipe, including a control box 1, a lower pressure plate 2, a hydraulic push rod 3, and a fixed base 5. The hydraulic push rod 3 is installed in the middle of the control box 1. The lower pressure plate 2 is fixedly connected to the bottom of the hydraulic push rod 3 via flange bolts. Guide columns 4 are slidably connected around the lower pressure plate 2. The fixed base 5 is fixedly connected to the bottom of the guide columns 4. A test platform 6 is installed on the upper middle part of the fixed base 5. The test platform 6 includes a platform base plate 63. Spring telescopic rods 65 are installed at the four corners of the upper part of the platform base plate 63. A platform moving plate 61 is installed at the moving end of the spring telescopic rods 65. Protective components 62 are installed on both sides of the platform base plate 63. Two sets of positioning components 64 are installed on the upper part of the platform base plate 63. A [missing information - likely a device or component] is installed between the two sets of positioning components 64. Synchronization component 66; Each set of positioning components 64 includes two rotating rods 641, with a positioning roller 644 rotatably connected between the upper ends of the two rotating rods 641. A third gear 642 is fixedly connected to the lower end of each rotating rod 641. A vertical pole 643 is installed on both sides of the lower end of each rotating rod 641. A second return spring 645 is installed on the inner side of the upper end of each vertical pole 643. Through the coordinated design of the control box 1, the lower pressure plate 2, the hydraulic push rod 3, the fixed base 5, and the test platform 6, as well as the cooperation of the double rotating rods 641, the positioning roller 644, the third gear 642, the vertical pole 643, and the second return spring 645 in the positioning component 64, the automatic centering and positioning of the spiral bellows 7 and the automatic separation during the test process are realized, which significantly improves the convenience, testing accuracy, and operational safety of strength testing in multiple scenarios.

[0044] As a further embodiment of the present invention, wherein: uprights 643 are installed on both sides of the lower end of any rotating rod 641, the cross-section of the through hole at the upper end of the upright 643 is T-shaped, the lower end of the upright 643 is fixedly connected to the platform base plate 63, the T-shaped cross-section design of the through hole at the upper end of the upright 643 enhances the stability of the cooperation with the rotating rod 641, and the fixed connection between the lower end of the upright 643 and the platform base plate 63 ensures the overall rigidity of the positioning component 64, making the reset action of the second reset spring 645 more accurate and reliable;

[0045] As a further embodiment of the present invention, there are four guide pillars 4, the upper ends of the four guide pillars 4 are fixedly connected to the control box 1, and the guide pillars 4 are parallel to each other. The upper ends of the four parallel guide pillars 4 are fixedly connected to the control box 1, which provides high-precision vertical sliding guidance for the lower pressure plate 2, effectively avoids eccentric load, ensures uniform pressure transmission, and thus improves the repeatability and accuracy of the ring stiffness test results.

[0046] As a further embodiment of the present invention, the upper end of the test platform 6 is used to place the spiral bellows 7 for ring stiffness testing. The platform moving plate 61 and the platform bottom plate 63 set inside the test platform 6 are parallel to the lower pressure plate 2. The platform moving plate 61 and the platform bottom plate 63 are kept parallel to the lower pressure plate 2, which ensures that the pressure surface of the spiral bellows 7 is completely horizontal during the test, eliminates the local stress concentration caused by the angle deviation, and makes the ring stiffness test data closer to the true performance of the material.

[0047] As a further embodiment of the present invention, the platform moving plate 61 includes a flat plate 611, a notch 612 is provided on the side of the flat plate 611, and a toothed plate 613 is fixedly connected inside the notch 612. The transverse projection of the toothed plate 613 is T-shaped. The toothed plate 613 with T-shaped projection is fixed inside the notch 612 on the side of the flat plate 611. This structure forms a stable meshing transmission with the third gear 642. When the platform moving plate 61 is pressed down, it can reliably drive the rotating rod 641 to rotate, realizing the automatic separation control of the positioning roller 644.

[0048] As a further embodiment of the present invention, the protective component 62 includes an anti-slip bend plate 621. A rotating shaft 624 is fixedly connected to the corner of the anti-slip bend plate 621. A connecting rod 622 is rotatably connected to both outer sides of the rotating shaft 624 through a first return spring 623. The connecting rod 622 is fixedly connected to the platform base plate 63. The anti-slip bend plate 621 is rotatably connected to the connecting rod 622 through the rotating shaft 624 and the first return spring 623. It can automatically flip upward and insert into the openings at both ends of the spiral corrugated pipe 7 when the platform moving plate 61 is pressed down, effectively preventing the pipe from sliding out laterally during the high-pressure test. At the same time, it automatically resets after the test is completed, without affecting the picking and placing of the pipe.

[0049] As a further embodiment of the present invention, the synchronization component 66 includes a synchronization toothed belt 661, with a first gear 662 meshing on the inner sides of both ends of the synchronization toothed belt 661, and a second gear 663 meshing on the other end of the first gear 662. The synchronization toothed belt 661, in conjunction with the meshing transmission of the first gear 662 and the second gear 663, ensures that the rotating rods 641 in the two sets of positioning components 64 rotate completely synchronously, thereby ensuring that the positioning rollers 644 on both sides simultaneously and symmetrically contact or separate the spiral corrugated pipe 7, maintaining the centering accuracy and force uniformity of the pipe during the testing process.

[0050] As a further embodiment of the present invention, the synchronization component 66 is provided in two sets. The first gear 662 set in either set is rotatably connected to the platform base plate 63 through a centrally set shaft. The two sets of synchronization components 66 provide redundant synchronization transmission paths, which enhances the reliability of the system. The first gear 662 is rotatably connected to the platform base plate 63 through the central shaft, which ensures the smoothness of gear transmission and low friction loss, and improves the service life and response sensitivity of the synchronization mechanism.

[0051] As a further embodiment of the present invention, the end of the second gear 663 away from the first gear 662 is set as a smooth rod, and the smooth rod end of the second gear 663 is fixedly connected to the bottom end of the rotating rod 641. The smooth rod end of the second gear 663 passes through the upright rod 643. The second gear 663 and the upright rod 643 are rotatably connected by the second return spring 645. The smooth rod end of the second gear 663 is fixed to the bottom end of the rotating rod 641 and passes through the upright rod 643. The rotatable connection is achieved with the second return spring 645. This design allows the rotating rod 641 to automatically reset and position under the action of spring force, and can reliably receive the driving force from the synchronization component 66, realizing a smooth switching between the positioning and separation modes.

[0052] like Figures 1-12 As shown in the figure, the principle of the method for using the strength testing device for multi-scenario adaptable spiral corrugated pipe provided in this embodiment is as follows:

[0053] Includes the following steps:

[0054] Step 1: Place the spiral bellows 7 to be tested on the upper end of the test platform 6. After placement, the positioning roller 644, under the action of the second reset spring 645, controls the rotating rod 641 to automatically position the spiral bellows 7 and center it.

[0055] Step 2: Control the hydraulic push rod 3 through the control box 1 to drive the lower pressure plate 2 to move downward. The lower pressure plate 2 first contacts the top of the spiral bellows 7 and presses it down steadily. When the bottom of the spiral bellows 7 contacts the top of the plate 611, it continues to move down until the plate 611 presses down the spring telescopic rod 65 until it is fully compressed.

[0056] During the pressing process where the bottom end of the spiral bellows 7 contacts the upper end of the flat plate 611, the positioning roller 644 maintains the positioning state of the spiral bellows 7.

[0057] During the process of pressing the spring telescopic rod 65 down to the fully compressed state by the flat plate 611, the toothed plate 613 contacts the third gear 642, and the control rod 641 drives the positioning roller 644 to rotate and separates from the spiral bellows 7.

[0058] The two positioning rollers 644 are synchronized by the synchronization component 66.

[0059] Furthermore, the flat plate 611 drives the U-shaped anti-slip plate 621 to rotate, and the upper end of the U-shaped anti-slip plate 621 is inserted into the openings at both ends of the spiral bellows 7 to prevent the spiral bellows 7 from sliding out between the lower pressure plate 2 and the flat plate 611 during the pressing process.

[0060] Step 3: The pressure plate 2 continues to move downward to complete the ring stiffness test of the spiral bellows 7. During this process, the control box 1 transmits the downward pressure data to the control center in real time. The control center analyzes the data and completes the test.

[0061] Step 4: After the test is completed, the lower pressure plate 2 is reset under the action of the hydraulic push rod 3, and the spiral bellows 7 is removed, completing a set of tests;

[0062] The four-step process achieves full automation of the 7-ring stiffness test of spiral corrugated pipes: automatic centering and positioning, automatic triggering of positioning separation and anti-slip insertion during the pressing process, real-time data transmission and analysis, and automatic reset. This significantly reduces the need for manual intervention, improves testing efficiency, data accuracy and operational safety, and can reliably adapt to various corrugated pipe strength testing scenarios with different diameters and wall thicknesses.

[0063] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0064] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A strength testing device for a multi-scenario adaptable spiral corrugated pipe, comprising a control box (1), a lower pressure plate (2), a hydraulic push rod (3), and a fixed base (5), characterized in that: The control box (1) is equipped with a hydraulic push rod (3) in the middle. The bottom end of the hydraulic push rod (3) is fixedly connected to a lower pressure plate (2) by flange bolts. The lower pressure plate (2) is slidably connected to guide columns (4) around its perimeter. The bottom end of the guide columns (4) is fixedly connected to a fixed base (5). The upper end of the fixed base (5) is equipped with a test platform (6). The test platform (6) includes a platform base plate (63), with spring telescopic rods (65) installed at the four corners of the upper end of the platform base plate (63), a platform moving plate (61) installed at the moving end of the spring telescopic rods (65), protective components (62) installed on both sides of the platform base plate (63), and two sets of positioning components (64) installed at the upper end of the platform base plate (63), with a synchronization component (66) installed between the two sets of positioning components (64). Each of the positioning components (64) includes two rotating rods (641), with a positioning roller (644) rotatably connected between the upper ends of the two rotating rods (641). A third gear (642) is fixedly connected to the lower end of each rotating rod (641). A vertical rod (643) is installed on both sides of the lower end of each rotating rod (641), and a second return spring (645) is installed on the inner side of the upper end of each vertical rod (643).

2. The strength testing device for a multi-scenario adaptable spiral corrugated pipe according to claim 1, characterized in that: Each of the rotating rods (641) has a vertical rod (643) installed on both sides of its lower end. The cross-section of the through hole at the upper end of the vertical rod (643) is T-shaped. The lower end of the vertical rod (643) is fixedly connected to the platform base plate (63).

3. The strength testing device for a multi-scenario adaptable spiral corrugated pipe according to claim 1, characterized in that: There are four guide posts (4), and the upper ends of the four guide posts (4) are fixedly connected to the control box (1), and the guide posts (4) are parallel to each other.

4. The strength testing device for a multi-scenario adaptable spiral corrugated pipe according to claim 1, characterized in that: The upper end of the test platform (6) is used to place the spiral corrugated pipe (7) for ring stiffness testing. The platform moving plate (61) and platform base plate (63) inside the test platform (6) are parallel to the lower pressure plate (2).

5. The strength testing device for a multi-scenario adaptable spiral corrugated pipe according to claim 1, characterized in that: The platform moving plate (61) includes a flat plate (611), and a notch (612) is provided on the side of the flat plate (611). A toothed plate (613) is fixedly connected inside the notch (612), and the transverse projection of the toothed plate (613) is T-shaped.

6. The strength testing device for a multi-scenario adaptable spiral corrugated pipe according to claim 1, characterized in that: The protective component (62) includes an anti-slip bend plate (621), and a rotating shaft (624) is fixedly connected at the corner of the anti-slip bend plate (621). Both ends of the rotating shaft (624) are rotatably connected to a connecting rod (622) through a first reset spring (623). The connecting rod (622) is fixedly connected to the platform base plate (63).

7. The strength testing device for a multi-scenario adaptable spiral corrugated pipe according to claim 1, characterized in that: The synchronization component (66) includes a synchronization toothed belt (661), with a first gear (662) meshing on the inner sides of both ends of the synchronization toothed belt (661), and a second gear (663) meshing on the other end of the first gear (662).

8. The strength testing device for a multi-scenario adaptable spiral corrugated pipe according to claim 7, characterized in that: The synchronization component (66) is provided in two sets, and the first gear (662) in either set is rotatably connected to the platform base plate (63) through a centrally located shaft.

9. The strength testing device for a multi-scenario adaptable spiral corrugated pipe according to claim 7, characterized in that: The end of the second gear (663) away from the first gear (662) is set as a smooth rod, and the end of the second gear (663) with the smooth rod is fixedly connected to the bottom end of the rotating rod (641). The end of the second gear (663) with the smooth rod passes through the upright rod (643). The second gear (663) and the upright rod (643) are rotatably connected by the second return spring (645).

10. A method for using a strength testing device for a multi-scenario adaptable spiral corrugated pipe, characterized in that: Includes the following steps: Step 1: Place the spiral bellows (7) to be tested on the upper end of the test platform (6). After placement, the positioning roller (644) controls the rotating rod (641) to automatically position the spiral bellows (7) under the action of the second reset spring (645) and place it in the center. Step 2: Control the hydraulic push rod (3) through the control box (1) to drive the lower pressure plate (2) to move downward. The lower pressure plate (2) first contacts the top of the spiral bellows (7) and presses it down steadily. When the bottom of the spiral bellows (7) contacts the top of the plate (611), it continues to move down until the plate (611) presses down the spring telescopic rod (65) until it is fully compressed. During the pressing process where the bottom end of the spiral bellows (7) contacts the top end of the flat plate (611), the positioning roller (644) maintains the positioning state of the spiral bellows (7); During the process of the flat plate (611) pressing down the spring telescopic rod (65) to the fully compressed state, the toothed plate (613) contacts the third gear (642), and the control rod (641) drives the positioning roller (644) to rotate and separate from the spiral bellows (7); The two positioning rollers (644) are synchronized by a synchronization component (66). The flat plate (611) drives the U-shaped anti-slip plate (621) to rotate, and the upper end of the U-shaped anti-slip plate (621) is inserted into the openings at both ends of the spiral bellows (7) to prevent the spiral bellows (7) from sliding out between the lower pressure plate (2) and the flat plate (611) during the pressing process. Step 3: The pressure plate (2) continues to move down to complete the ring stiffness test of the spiral bellows (7). During this process, the control box (1) transmits the pressure data to the control center in real time. The control center analyzes the data and completes the test. Step 4: After the test is completed, the lower pressure plate (2) is reset under the drive of the hydraulic push rod (3), and the spiral bellows (7) is removed to complete a complete test.

Images