Equipment and methods for end cap back-to-back pressure test

Abstract

This invention discloses a back-to-back pressure testing device and method for end caps, relating to the field of testing technology. The device includes a testing fixture, a clamping mechanism, a posture adjustment mechanism, and a traction mechanism. The testing fixture includes an external support structure and a test roll, with connecting flanges at both ends of the test roll. The clamping mechanism is symmetrically arranged at both ends of the test roll, supporting and pushing the end cap to be tested. The posture adjustment mechanism is corresponding to the clamping mechanism, adjusting the end cap to be tested parallel to the connecting flanges. The traction mechanism is corresponding to the clamping mechanism, moving with it and applying a traction force towards the side of the end cap to be tested towards the clamping mechanism. This invention reduces operational difficulty, improves installation accuracy, enhances sealing effect, and ensures accurate pressure testing.

Description

Technical Field

[0001] This invention relates to the field of testing technology, specifically to testing equipment and methods for end cap back-to-back pressure testing. Background Technology

[0002] The end cap back-to-back pressure test is an important testing method for evaluating the sealing performance and structural strength of end caps. It is mainly used to verify the reliability of end caps under bidirectional pressure. The test principle is to apply pressure to both sides of the end cap at the same time to simulate the bidirectional stress state in actual working conditions and detect the deformation, leakage and structural integrity of the end cap.

[0003] In related technologies, when conducting back-to-back tests on H84 end caps, two H84 end caps need to be fixed and sealed at both ends of a test roll. Then, the center of the two H84 end caps is sealed by an intermediate roll. The H84 end caps are tested by inflating the test roll with air and using a sensor on the outside of the test roll to detect pressure changes.

[0004] However, due to the large size and weight of the H84 end cap, when installing the end cap to both ends of the test roll, it is usually necessary to manually connect the end cap to the test roll with bolts using a ladder. Furthermore, before inserting the bolts, it is also necessary to manually align and correct the bolt holes between the terminals and the test roll. This makes it difficult to seal the end cap during testing and increases the operational difficulty of the end cap during back-to-back pressure testing. Summary of the Invention

[0005] To address one of the shortcomings of existing technologies, this invention provides an end cap back-to-back pressure test equipment and method, which solves the problem that the end cap is not easy to seal during testing, thus increasing the difficulty of back-to-back pressure test operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an end cap back-to-back pressure testing device, comprising:

[0007] The testing fixture includes an external support structure and a test roll, with the test roll positioned in the middle of the internal structure of the external support structure; connecting flanges are provided at both ends of the test roll.

[0008] A clamping mechanism is symmetrically arranged at both ends of the test roll. The clamping mechanism can support the end cap to be tested and push the end cap to be tested toward the test roll.

[0009] An attitude adjustment mechanism is provided for each clamping mechanism. The attitude adjustment mechanism is located between the clamping mechanism and the testing fixture. The attitude adjustment mechanism can adjust the end cap to be tested to be parallel to the connecting flange of the test roll port.

[0010] A traction mechanism is provided for each clamping mechanism. The traction mechanism is located on the side of the clamping mechanism facing the test roll. The traction mechanism can follow the movement of the clamping mechanism. The traction mechanism can also apply a traction force toward the clamping mechanism to the side of the end cap to be tested.

[0011] Preferably, the external support structure of the testing fixture includes:

[0012] There are two symmetrically arranged external frames, and the clamping mechanism is connected to the external frames.

[0013] A side frame is provided between the two sides of the outer uprights;

[0014] The base frame is located between the bottoms of the two external frames;

[0015] The intermediate frame is fixedly connected at its bottom end to the middle of the upper surface of the base frame; the test roll is fixedly connected to the intermediate frame.

[0016] Preferably, the intermediate frame includes:

[0017] A bottom support is fixedly installed between the lower part of the test roll and the upper surface of the base frame;

[0018] A reinforcing structure is provided, surrounding the outer wall of the test roll, with both ends of the reinforcing structure connected to the connecting flanges on both sides of the test roll, respectively.

[0019] The climbing structure is an "n"-shaped ladder, including a vertical climbing section and an arc-shaped climbing section. The vertical climbing section is located on the horizontal side of the test roll, and the top of the arc-shaped climbing section is connected to the top of the vertical climbing section, which surrounds the upper part of the test roll.

[0020] Preferably, the clamping mechanism includes:

[0021] A clamping frame is disposed between the test roll and the outer frame;

[0022] A clamping drive assembly is disposed between the clamping frame and the outer frame. The clamping drive assembly can drive the clamping frame to move toward or away from the test roll.

[0023] A support adjustment assembly is provided on the side of the clamping frame facing the test roll. The support adjustment assembly is located at the lower part of the clamping frame and can provide support force to the end cap under test. The support adjustment assembly can drive the end cap under test to rotate, and the axis of rotation of the end cap under test is its own axis.

[0024] Preferably, the support adjustment component includes:

[0025] The support roller is a circular roller body. The support roller is rotatably connected to the pressing frame. Several support rollers are distributed in an arc shape at the lower part of the pressing frame.

[0026] The padding roller is coaxially and fixedly connected to the support roller; the padding roller is located at the end of the support roller facing the clamping frame.

[0027] When the end cap to be tested is located on the upper side of the support roller, the end cap to be tested is coaxial with the test roll; and the pad and the end cap to be tested are in contact with each other on the side facing the clamping frame.

[0028] Preferably, the support adjustment component further includes:

[0029] Adjust the drive assembly and connect it to the clamping frame, and adjust the drive assembly and link it with the support roller or pad wheel to drive the support roller or pad wheel to rotate.

[0030] Preferably, the clamping mechanism further includes:

[0031] A positioning component is disposed on the upper part of the clamping frame, and the positioning component includes:

[0032] The positioning blocks are provided in several units, and the positioning blocks are fixedly connected to the side of the clamping frame facing the test roll. When the clamping frame pushes the end cap to be tested, the positioning blocks are attached to the side of the end cap to be tested away from the test roll.

[0033] At least one positioning pin is provided. The positioning pin is an electromagnetic pin set on the positioning block, and the positioning pin corresponds to the connection hole on the end cap to be tested.

[0034] Preferably, the attitude adjustment mechanism includes:

[0035] At least one adjusting roller is symmetrically arranged on both horizontal sides of the clamping frame; the roller shaft of the adjusting roller is horizontally arranged, one end of the adjusting roller is rotatably connected to the clamping frame, and the axis of rotation of the adjusting roller is vertical;

[0036] When the clamping frame moves away from the test roll, the adjusting roller rotates inward toward the clamping frame, and the end cap to be tested is located between the adjusting roller and the clamping frame; when the clamping frame moves closer to the test roll, the adjusting roller rotates outward toward the clamping frame.

[0037] Preferably, the attitude adjustment mechanism further includes:

[0038] An adjustment rotating frame is provided, with one frame on each of the two horizontal sides of each clamping frame. The adjustment rotating frame and the clamping frame are vertically rotatably connected. Two adjustment rollers are provided on the frame of the adjustment rotating frame, and the two adjustment rollers are vertically distributed and parallel to each other.

[0039] Adjust the drive assembly to a gear and rack combination, including:

[0040] Adjust the gear, which is fixedly mounted at the end of the rotating frame;

[0041] Adjust the rack, which is fixedly mounted on the side frame, and adjust the gear and the rack to mesh.

[0042] Preferably, the traction mechanism includes:

[0043] The traction frame is rotatably connected to the clamping frame;

[0044] A traction assembly is disposed on the side of the traction frame facing the test drum; the traction assembly includes an electromagnet.

[0045] Preferably, it also includes:

[0046] An internal sealing mechanism can seal the hollow structure in the middle of the end cap to be tested; the internal sealing mechanism includes:

[0047] Connecting cylinders are provided on both sides of the test roll;

[0048] A sealing flange is connected to the connecting cylinder;

[0049] The sealing drive assembly is linked with the connecting cylinder; it can drive the connecting cylinder to move toward or away from the end cap to be tested.

[0050] The end cap back-to-back pressure test method, using the end cap back-to-back pressure test equipment as described above, includes the following steps:

[0051] S1. Use lifting tools to lift the end cap to be tested and transport it to the top of the testing fixture;

[0052] S2. Adjust the position of the clamping frame in the clamping mechanism to leave space for the end cap to be tested between the test roll and the clamping frame;

[0053] S3. Place the end cap to be tested onto the clamping frame so that the support adjustment component can support the end cap to be tested. Use the support adjustment component to adjust the axis of the end cap to be tested and the axis of the test roll to the same horizontal plane.

[0054] S4. The attitude adjustment mechanism adjusts the vertical angle of the end cap to be tested, adjusting the end cap to be tested so that its axis coincides with the axis of the test roll.

[0055] S5. Drive the end cap under test to rotate by the support adjustment component, and adjust the end cap under test to the required angle;

[0056] S6. Drive the clamping frame to push the end cap under test to fit against the connecting flange; drive the internal sealing mechanism to seal the internal hollow area of ​​the end cap under test with the sealing flange;

[0057] S7. Fill the test roll with the test medium and test the sealing performance of the end cap to be tested.

[0058] Compared with existing technologies, it has the following beneficial effects:

[0059] Reduced operational difficulty: By setting up a clamping mechanism, the end cap to be tested can be supported and pushed, eliminating the need for manual operation of bolting the end cap to the test roll using a ladder. This effectively solves the problem of inconvenient installation caused by the large size and weight of the H84 end cap, and significantly reduces the operational difficulty of the end cap during back-to-back pressure testing.

[0060] Improved installation accuracy: The attitude adjustment mechanism can adjust the end cap under test to be parallel to the connecting flange at the port of the test roll, realizing automatic alignment and correction of the bolt holes between the end cap and the test roll, avoiding errors caused by manual alignment, ensuring precise docking between the end cap and the test roll, and providing a reliable foundation for subsequent sealing installation.

[0061] Enhanced sealing effect: The traction mechanism can apply a traction force towards the clamping mechanism on the side of the end cap to be tested. Together with the clamping mechanism, it pushes the end cap towards the test drum, so that the end cap and the connecting flange form a tight fit, which effectively improves the sealing performance after the end cap is installed and ensures the accuracy of pressure detection during the test.

[0062] Improved testing efficiency: This invention simplifies the end cap installation process by coordinating the work of various mechanisms, reduces manual intervention, and shortens the end cap installation and debugging time, thereby improving the overall testing efficiency of the back-to-back pressure test of the end caps. It is suitable for the testing and inspection of batch end caps. Attached Figure Description

[0063] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0064] Figure 2 This is a schematic diagram of the working state of an embodiment of this application;

[0065] Figure 3 This is a top view of the working state of an embodiment of this application;

[0066] Figure 4 This is a schematic diagram of the second working state according to an embodiment of this application;

[0067] Figure 5 This is a top view of the second working state of an embodiment of this application;

[0068] Figure 6 This is an exploded structural diagram of the test roll and the end cap to be tested according to an embodiment of this application;

[0069] Figure 7 This is a schematic diagram of the clamping mechanism structure according to an embodiment of this application;

[0070] Figure 8 This is an exploded view of the clamping mechanism and traction mechanism according to an embodiment of this application;

[0071] Figure 9 This is a schematic diagram of the attitude adjustment mechanism structure according to an embodiment of this application;

[0072] Figure 10 This is a schematic diagram of the internal sealing mechanism in an embodiment of this application;

[0073] Figure 11 This is a cross-sectional view of the test roll and the end cap to be tested according to an embodiment of this application;

[0074] Figure 12 for Figure 11 A magnified structural diagram of part A in the middle;

[0075] Figure 13 for Figure 11 A magnified structural diagram of part B in the diagram.

[0076] In the picture:

[0077] 100. End cap to be tested; 101. Bushing; 102. Rubber ring flange; 103. Ring groove;

[0078] 1. Inspection fixture; 11. Test roll; 111. Inspection hole; 12. Connecting flange; 121. First sealing ring; 13. External support structure; 131. External frame; 132. Side frame; 133. Base frame; 134. Intermediate frame; 1341. Bottom support; 1342. Reinforcing structure; 1343. Climbing structure; 14. Warning light;

[0079] 2. Clamping mechanism; 21. Clamping frame; 211. Main frame; 212. Connecting frame; 213. Slide groove; 22. Clamping drive assembly; 23. Support adjustment assembly; 231. Support roller; 232. Washer wheel; 233. Adjustment drive assembly; 2331. Adjustment motor; 24. Positioning assembly; 241. Positioning block; 242. Positioning pin;

[0080] 3. Attitude adjustment mechanism; 31. Adjusting roller; 32. Adjusting rotating frame; 33. Adjusting drive assembly; 331. Adjusting gear; 332. Adjusting rack;

[0081] 4. Traction mechanism; 41. Traction frame; 411. Sliding component; 42. Traction assembly; 421. Traction box; 422. Electromagnet; 423. Limiting block; 424. Limiting groove; 43. Counterweight;

[0082] 5. Internal sealing mechanism; 51. Connecting cylinder; 52. Sealing flange; 53. Sealing drive assembly; 54. Detailed Implementation

[0083] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0084] Please see Figures 1-5 This application provides the following technical solutions:

[0085] The end cap back-to-back pressure testing equipment includes a testing fixture 1, a clamping mechanism 2, a posture adjustment mechanism 3, and a traction mechanism 4. The testing fixture 1 includes an outer support structure 13 and a test roll 11, which is positioned at the center of the outer support structure 13. Connecting flanges 12 are located at both ends of the test roll 11. The test roll 11 can be connected to the end cap 100 under test via the connecting flanges 12. After confirming a seal, a testing medium can be filled into the test roll 11. A testing hole 111 is made in the wall of the test roll 11, and a corresponding sensor is installed at the testing hole 111 to detect the pressure inside the test roll 11. If the pressure remains constant within the testing time, it indicates that the end cap 100 under test is in good sealing condition. To ensure a good seal at the connecting flange 12, a first sealing ring 121 is installed at the connecting flange 12. The aforementioned testing method is a conventional testing method for end caps combined with the test roll 11. This solution takes into account the installation of large end caps and the inconvenience of ensuring a tight seal with the test roll 11, and includes a clamping mechanism 2, an attitude adjustment mechanism 3, and a traction mechanism 4.

[0086] The clamping mechanism 2 is symmetrically arranged at both ends of the test roll 11. The clamping mechanism 2 can support the end cap 100 to be tested and push the end cap 100 towards the test roll 11. An attitude adjustment mechanism 3 is arranged between the clamping mechanism 2 and the testing fixture 1. The attitude adjustment mechanism 3 is arranged for each clamping mechanism 2. The attitude adjustment mechanism 3 can adjust the end cap 100 to be tested to be parallel to the end face of the test roll 11. The traction mechanism 4 is also arranged for each clamping mechanism 2. The traction mechanism 4 is located on the side of the clamping mechanism 2 facing the test roll 11. The traction mechanism 4 can move with the clamping mechanism 2 and can apply traction force to the side of the end cap 100 to be tested.

[0087] The clamping mechanism 2 supports the end cap 100 under test, facilitating initial positioning during the testing of large end caps. Based on this support, the orientation of the end cap is adjusted by the attitude adjustment mechanism 3 to ensure that the end cap 100 under test and the connecting flange 12 at the end of the test roll 11 are parallel, while simultaneously ensuring the end cap 100 is in a stable vertical position. Then, the traction mechanism 4 applies traction to the end cap 100 under test, while the clamping mechanism 2 pushes the end cap 100 towards the test roll 11, achieving docking between the end cap 100 and the connecting flange 12 at the end of the test roll 11.

[0088] By coordinating the clamping mechanism 2, the posture adjustment mechanism 3, and the traction mechanism 4, the positioning difficulty during the inspection of large end caps can be greatly reduced, thereby reducing the burden on staff and improving the accuracy of the inspection.

[0089] Based on the above implementation scheme, the outer support structure 13 of the testing fixture 1 includes two symmetrically arranged outer frames 131, and two side frames 132 are arranged symmetrically between the sides of the two outer frames 131. The outer frames 131 and the side frames 132 form a rectangular support space. A base frame 133 is arranged between the bottoms of the two outer frames 131. An intermediate frame 134 is fixedly arranged at the middle position of the upper surface of the base frame 133, and the test roll 11 is fixed by the intermediate frame 134. The outer frames 131 are connected to the clamping mechanism 2.

[0090] The external frame 131, side frame 132, base frame 133, and intermediate frame 134 of this scheme form the testing fixture 1 as a support structure. Its specific structural form is not limited, as long as it can provide stable support force and reserve clearance for moving parts. The test roll 11 and the clamping mechanism 2 are respectively set at different positions of the testing fixture 1, and the attitude adjustment mechanism 3 and the traction mechanism 4 are connected to the clamping mechanism 2.

[0091] Based on the above implementation plan, see Figure 6The intermediate frame 134 includes a bottom support 1341, a reinforcing structure 1342, and a climbing structure 1343. The bottom support 1341 is fixedly installed between the lower part of the test roll 11 and the upper surface of the base frame 133, serving as the basic support structure for the test roll 11. The reinforcing structure 1342 surrounds the outer wall of the test roll 11, and its two ends are respectively connected to the connecting flanges 12 on both sides of the test roll 11. In this design, the reinforcing structure 1342 is a reinforcing rib. The climbing structure 1343 is an "n"-shaped ladder, including two parallel vertical climbing parts and an arc-shaped climbing part located at the top of the vertical climbing parts. The two vertical climbing parts are respectively located on one side of the transverse side of the test roll 11, and the arc-shaped climbing part is connected to the top of the vertical climbing parts, surrounding the upper part of the test roll 11. With the setting of this climbing structure 1343, in addition to the fact that the staff can easily climb to the upper side of the test tube 11 through the vertical climbing part, the arc-shaped climbing part also helps the staff to have a good foothold when working on the upper side of the test tube 11.

[0092] Based on the above implementation plan, a warning light 14 is also installed above the external frame 131. Multiple warning lights 14 can be installed, and various different forms and colors can be selected. The specific setting form of the warning lights 14 is not limited. It can be set according to the needs to facilitate the staff to observe and understand the working status of the equipment.

[0093] Based on the above implementation plan, see Figure 7 and Figure 8 The clamping mechanism 2 includes a clamping frame 21, a clamping drive assembly 22, and a support adjustment assembly 23. The clamping frame 21 includes a main frame 211 and a connecting frame 212. The main frame 211 is an overall annular plate structure. The connecting frame 212 is used to connect with the attitude adjustment mechanism 3. The structural form of the connecting frame 212 will be described in detail later.

[0094] A clamping frame 21 is positioned between the test roll 11 and the outer frame 131; a clamping drive assembly 22 is positioned between the clamping frame 21 and the outer frame 131. The clamping drive assembly 22 consists of several telescopic cylinders; in this design, hydraulic cylinders are used. The fixed end of each cylinder is fixedly connected to the outer frame 131, and the movable end is fixedly connected to the clamping frame 21. The clamping drive assembly 22 drives the clamping frame 21 to move toward or away from the test roll 11, thereby enabling the clamping frame 21 to engage and disengage the end cap 100 to be tested and the connecting flange 12.

[0095] The support adjustment assembly 23 is located on the side of the clamping frame 21 facing the test roll 11, and the support adjustment assembly 32 is located at the lower part of the clamping frame 21. The support adjustment assembly 23 includes a support roller 231 and a pad wheel 232. The support roller 231 is a circular roller body rotatably connected to the clamping frame 21, and several support rollers 231 are distributed in an arc shape at the lower part of the clamping frame 21. The pad wheel 232 is coaxially and fixedly connected to the support roller 231; the pad wheel 232 is located at the end of the support roller 231 facing the clamping frame 21. When the end cap 100 to be tested is located on the upper side of the support roller 231, the end cap 100 to be tested is coaxial with the test roll 11; and the pad wheel 232 and the side of the end cap 100 to be tested facing the clamping frame 21 are in contact. The support rollers 231 provide upward support to the end cap 100 under test and, through their circular distribution, help position the end cap 100, ensuring that it is coaxial with the test roll 11 after subsequent adjustments. Once the end cap 100 is stably placed on the support rollers 231, the axis of the end cap 100 and the axis of the test roll 11 are on the same horizontal plane.

[0096] The support adjustment assembly 23 also includes an adjustment drive assembly 233, which includes an adjustment motor 2331 mounted on the clamping frame 21. The adjustment motor 2331 serves as the power source for the adjustment action. A transmission box is mounted on the clamping frame 21, and the combination of the support rollers 231 and the pads 232 is rotatably connected to the transmission box. All support rollers 231 and pads 232 are driven to rotate through the transmission structure inside the motor 2331 and the transmission box. The internal structure of the transmission box is not limited, as long as it can ensure that all support rollers 231 rotate synchronously. Stable linkage methods such as gear transmission or chain transmission can be used. Belt transmission is not recommended because the end cap 100 under test in this solution has a large self-weight, and belt transmission may easily lead to slippage.

[0097] The main function of the support adjustment assembly 23 is to rotate the end cap 100 to be tested. The lower part of the end cap 100 to be tested rests on the support roller 231. When all the support rollers 231 rotate, the end cap 100 to be tested can rotate simultaneously. The purpose of the support adjustment assembly 23 in rotating the end cap 100 to be tested needs to be explained in conjunction with the subsequent structure, which will be elaborated later.

[0098] Based on the above implementation scheme, the clamping mechanism 2 further includes a positioning component 24, which is disposed on the upper part of the clamping frame 21. The positioning component 24 includes positioning blocks 241 and positioning pins 242. Several positioning blocks 241 are provided, and the positioning blocks 241 are fixedly connected to the side of the clamping frame 21 facing the test roll 11. The positioning blocks 241 are arranged in an arc-shaped array. When the clamping frame 21 pushes the end cap 100 to be tested, the positioning blocks 241 are in contact with the side of the end cap 100 to be tested away from the test roll 11. When the clamping frame 21 moves, the positioning blocks 241, in conjunction with the pads 232, can push the end cap 100 to be tested more stably and smoothly. A positioning pin 242 is provided on the positioning block 241 located in the upper middle position. The positioning pin 242 is an electromagnetic pin that can extend towards the test roll 11, and the positioning pin 242 corresponds to the connecting hole on the end cap 100 to be tested.

[0099] To ensure the controllability of the installation position of the end cap 100 under test, a connection hole on the end cap 100 under test is first identified and marked during testing. After the end cap 100 under test is placed on the support roller 231, the end cap 100 under test can be rotated by the rotation of the support roller 231, so that the marked connection hole and the positioning pin 242 are aligned, achieving precise positioning.

[0100] Based on the above implementation plan, see Figure 8 and Figure 9 Two connecting frames 212 are symmetrically arranged on both sides of the clamping frame 21, and vertical connecting holes are provided on the connecting frames 212. The attitude adjustment mechanism 3 includes an adjustment rotating frame 32 that is vertically rotatably connected to the connecting frame 212. Two horizontal adjustment rollers 31, which are circular rollers, are rotatably connected to each adjustment rotating frame 32. The adjustment rotating frame 32 is driven to rotate by the adjustment drive assembly 33.

[0101] The adjustment drive assembly 33 of this solution is a gear and rack combination, including an adjustment gear 331 fixedly installed at the upper and lower ends of the rotating frame 32, and an adjustment rack 332 fixedly installed on the side frame 132. The adjustment rack 332 is horizontally installed, and its extension direction is parallel to the axial direction of the test roll 11. The adjustment gear 331 and the adjustment rack 332 mesh.

[0102] See Figure 3 and Figure 5Through this structure, when the clamping frame 21 moves away from the test roll 11, the adjusting roller 31 rotates inward toward the clamping frame 21; the end cap 100 to be tested is located between the adjusting roller 31 and the clamping frame 21. The adjusting roller 31 presses against the surface of the end cap 100 to be tested, thereby moving the end cap 100 to be tested parallel to the connecting flange 12, achieving the effect of "straightening" the end cap 100 to be tested. After adjustment by the attitude adjustment mechanism 3, the axis of the end cap 100 to be tested coincides with the axis of the test roll 11. This state is... Figure 5 The state shown is the second working state. When the clamping frame 21 moves close to the test roll 11, the adjusting roller 31 rotates outward from the clamping frame 21. The adjusting roller 31 will not interfere with the connection between the end cover 100 to be tested and the connecting flange 12. This state is... Figure 3 The state shown is the first working state.

[0103] Based on the above implementation plan, see Figure 7 and Figure 8 The traction mechanism 4 includes a traction frame 41 and traction components 42. The traction frame 41 is an annular plate with a through hole in its center to provide clearance for the internal sealing mechanism 5 described later. The traction frame 41 and the clamping frame 21 are rotatably connected. Two arc-shaped sliding members 411 are provided on one side of the traction frame 41, and two corresponding arc-shaped sliding grooves 213 are provided on the clamping frame 21. The longitudinal section of the sliding members 411 is "L"-shaped. The traction frame 41 and the sliding grooves 213 allow the traction frame 41 to be rotatably connected to the clamping frame 21 without axial displacement. Several traction components 42 are provided on the side of the traction frame 41 facing the test roll 11. The traction component 42 includes a traction box 421 fixedly installed on the side of the clamping frame 21. An electromagnet 422 is slidably connected inside the traction box 421, and the sliding direction of the electromagnet 422 is the axial direction of the test roll 11. Two limiting blocks 423 are respectively set on both sides of the electromagnet 422, and long limiting grooves 424 are opened on both sides of the traction box 421 corresponding to the limiting blocks 423.

[0104] With the introduction of the traction component 42, after the attitude adjustment mechanism 3 has adjusted the end cap 100 to be tested, the electromagnet 422 is activated to attract the end cap 100 to be tested and apply a pulling force toward the clamping frame 21. In this way, during the subsequent rotation of the end cap 100 to be tested and the pushing toward the test roll 11, the stability of the end cap 100 to be tested can be further ensured, making it less likely to tip over.

[0105] Based on the above implementation scheme, a counterweight 43 is provided at the bottom of the traction frame 41. Here, "bottom" refers to the position relative to the bottom of the traction frame 41 when it is not rotating with the end cap 100 to be tested. Because when the support adjustment assembly 23 of the clamping mechanism 2 rotates and adjusts the end cap 100 to be tested, the traction frame 41 will rotate with the end cap 100 to be tested, simultaneously providing traction force. After the work is completed, the electromagnet 422 releases its attraction force, and under the weight of the counterweight 43, the traction frame 41 can automatically rotate back to its original position.

[0106] Based on the above implementation plan, see Figures 10 to 13 To ensure sealing of the internal perforated structure of the end cap 100 under test, this solution also includes an internal sealing mechanism 5. The internal sealing mechanism 5 comprises two connecting cylinders 51 symmetrically arranged on both sides of the test roll 11. One connecting cylinder 51 has a sealing flange 52 fixedly mounted on its end facing the test roll 11, while the other connecting cylinder 51 has a slidably connected sealing flange 52. For each connecting cylinder 51, a sealing drive assembly 53 is provided. The sealing drive assembly 53 is a hydraulic cylinder, with its fixed end fixedly connected to the outer frame 131 and its movable end connected to the connecting cylinder 51. The sealing drive assembly 53 drives the connecting cylinder 51 to move towards or away from the end cap 100 under test. An annular sealing groove 54 is provided on the connecting cylinder 51, and a sealing ring is fitted into the sealing groove 54 to improve the sealing effect between the sealing flange 52 and the connecting cylinder 51.

[0107] After the end cap 100 to be tested and the test roll 11 are attached, the sealing drive assembly 53 drives the connecting cylinder 51 to move. The connecting cylinder 51 moves closer to the bushing 101 in the end cap 100 to be tested. The sealing flange 52 and the rubber ring flange 102 at the bushing 101 are attached, and the sealing ring in the groove 103 on the rubber ring flange 102 is used to seal the hollow part inside the end cap 100 to be tested. Then the test medium can be filled and the end cap 100 to be tested can be tested.

[0108] Based on the above implementation scheme, this scheme proposes a method for end cap back-to-back pressure testing, using the aforementioned end cap back-to-back pressure testing equipment, including the following steps:

[0109] S1. Use lifting tools to lift the end cap 100 to be tested and transport it to the top of the testing fixture 1;

[0110] S2. Adjust the position of the clamping frame 21 in the clamping mechanism 2 to leave space for the end cap 100 to be tested between the test roll 11 and the clamping frame 21;

[0111] S3. Place the end cap 100 to be tested onto the clamping frame 21, so that the support adjustment component 23 supports the end cap 100 to be tested, and adjust the axis of the end cap 100 to be tested and the axis of the test roll 11 to the same horizontal plane with the help of the support adjustment component 23.

[0112] S4. The attitude adjustment mechanism 3 adjusts the vertical angle of the end cover 100 to be tested, and adjusts the end cover 100 to be tested so that its axis coincides with the axis of the test roll 11.

[0113] S5. Drive the end cap 100 under test to rotate by the support adjustment component 23, and adjust the end cap 100 under test to the required angle.

[0114] S6. Drive the clamping frame 21 to push the end cover 100 to be tested to fit with the connecting flange 12; drive the internal sealing mechanism 5 to make the sealing flange 52 seal the hollow area inside the end cover 100 to be tested.

[0115] S7. Fill the test roll 11 with the test medium and test the sealing performance of the end cap 100 to be tested.

[0116] S8. After the test is completed, the clamping frame 21 is retracted and all mechanisms are reset.

[0117] In the description of this application and its embodiments, it should be understood that the terms "top", "bottom", "height", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0118] In this application and its embodiments, unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0119] In this application and its embodiments, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0120] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0121] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0122] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A back-to-back pressure test detection apparatus for end caps, characterized by, include: The testing fixture includes an external support structure and a test roll, with the test roll positioned in the middle of the internal structure of the external support structure; connecting flanges are provided at both ends of the test roll. A clamping mechanism is symmetrically arranged at both ends of the test roll. The clamping mechanism can support the end cap to be tested and push the end cap to be tested toward the test roll. An attitude adjustment mechanism is provided for each clamping mechanism. The attitude adjustment mechanism is located between the clamping mechanism and the testing fixture. The attitude adjustment mechanism can adjust the end cap to be tested to be parallel to the connecting flange of the test roll port. A traction mechanism is provided for each clamping mechanism. The traction mechanism is located on the side of the clamping mechanism facing the test roll. The traction mechanism can follow the movement of the clamping mechanism. The traction mechanism can also apply a traction force toward the clamping mechanism to the side of the end cap to be tested.

2. The end cap back-to-back pressure test detection apparatus of claim 1, wherein, The external support structure of the testing fixture includes: There are two symmetrically arranged external frames, and the clamping mechanism is connected to the external frames. A side frame is provided between the two sides of the outer uprights; The base frame is located between the bottoms of the two external frames; The intermediate frame is fixedly connected at its bottom end to the middle of the upper surface of the base frame; the test roll is fixedly connected to the intermediate frame.

3. The end cap back-to-back pressure test detection apparatus of claim 2, wherein, The intermediate frame includes: A bottom support is fixedly installed between the lower part of the test roll and the upper surface of the base frame; A reinforcing structure is provided, surrounding the outer wall of the test roll, with both ends of the reinforcing structure connected to the connecting flanges on both sides of the test roll, respectively. The climbing structure is an "n"-shaped ladder, including a vertical climbing section and an arc-shaped climbing section. The vertical climbing section is located on the horizontal side of the test roll, and the top of the arc-shaped climbing section is connected to the top of the vertical climbing section. The arc-shaped climbing section surrounds the upper part of the test roll.

4. The end cap back-to-back pressure test detection apparatus of claim 2, wherein, The clamping mechanism includes: A clamping frame is disposed between the test roll and the outer frame; a clamping drive assembly is disposed between the clamping frame and the outer frame, and the clamping drive assembly is used to drive the clamping frame to move toward or away from the test roll. A support adjustment assembly is provided on the side of the clamping frame facing the test roll. The support adjustment assembly is located at the lower part of the clamping frame and can provide support force to the end cap under test. The support adjustment assembly can drive the end cap under test to rotate, and the axis of rotation of the end cap under test is its own axis.

5. The end cap back-to-back pressure test detection apparatus of claim 4, wherein, The support adjustment component includes: The support roller is a circular roller body. The support roller is rotatably connected to the pressing frame. Several support rollers are distributed in an arc shape at the lower part of the pressing frame. The padding roller is coaxially and fixedly connected to the support roller; the padding roller is located at the end of the support roller facing the clamping frame. When the end cap to be tested is located on the upper side of the support roller, the end cap to be tested is coaxial with the test roll; and the pad and the end cap to be tested are in contact with each other on the side facing the clamping frame.

6. The end cap back-to-back pressure test detection apparatus of claim 5, wherein, The support adjustment component also includes: Adjust the drive assembly, connect it to the clamping frame, and adjust the drive assembly to be linked with the support roller or pad wheel, so that the support roller or pad wheel can be driven to rotate.

7. The end cap back-to-back pressure test detection apparatus of claim 4, wherein, The clamping mechanism further includes: A positioning component is disposed on the upper part of the clamping frame, and the positioning component includes: The positioning blocks are provided in several units, and the positioning blocks are fixedly connected to the side of the clamping frame facing the test roll. When the clamping frame pushes the end cap to be tested, the positioning blocks are attached to the side of the end cap to be tested away from the test roll. At least one positioning pin is provided. The positioning pin is an electromagnetic pin set on the positioning block, and the positioning pin corresponds to the connection hole on the end cap to be tested.

8. The end cap back-to-back pressure test detection apparatus of claim 4, wherein, The attitude adjustment mechanism includes: At least one adjusting roller is symmetrically arranged on both horizontal sides of the clamping frame; the roller shaft of the adjusting roller is horizontally arranged, one end of the adjusting roller is rotatably connected to the clamping frame, and the axis of rotation of the adjusting roller is vertical; When the clamping frame moves away from the test roll, the adjusting roller rotates inward toward the clamping frame, and the end cap to be tested is located between the adjusting roller and the clamping frame; when the clamping frame moves closer to the test roll, the adjusting roller rotates outward toward the clamping frame.

9. The end cap back-to-back pressure test detection apparatus of claim 8, wherein, The attitude adjustment mechanism further includes: An adjustment rotating frame is provided, with one frame on each of the two horizontal sides of each clamping frame. The adjustment rotating frame and the clamping frame are vertically rotatably connected. Two adjustment rollers are provided on the frame of the adjustment rotating frame, and the two adjustment rollers are vertically distributed and parallel to each other. Adjust the drive assembly to a gear and rack combination, including: The adjusting gear is fixedly mounted at the end of the adjusting rotating frame; Adjust the rack, which is fixedly mounted on the side frame, and adjust the gear and the rack to mesh.

10. The end cap back-to-back pressure testing equipment as described in claim 4, characterized in that, The traction mechanism includes: The traction frame is rotatably connected to the clamping frame; A traction assembly is disposed on the side of the traction frame facing the test drum; the traction assembly includes an electromagnet.

11. The end cap back-to-back pressure testing equipment as described in claim 4, characterized in that, Also includes: An internal sealing mechanism is used to seal the hollow structure in the middle of the end cap to be tested; The internal sealing mechanism includes: Connecting cylinders are provided on both sides of the test roll; A sealing flange is connected to the connecting cylinder; The sealing drive assembly is linked with the connecting cylinder; it can drive the connecting cylinder to move toward or away from the end cap to be tested.

12. A method for testing back-to-back pressure of end caps, characterized in that, Using the end cap back-to-back pressure test equipment as described in claim 11, the steps include: S1. Use lifting tools to lift the end cap to be tested and transport it to the top of the testing fixture; S2. Adjust the position of the clamping frame in the clamping mechanism to leave space for the end cap to be tested between the test roll and the clamping frame; S3. Place the end cap to be tested onto the clamping frame so that the end cap to be tested is supported by the support adjustment assembly. Use the support adjustment assembly to adjust the axis of the end cap to be tested and the axis of the test roll to the same horizontal plane. S4. The attitude adjustment mechanism adjusts the vertical angle of the end cap to be tested, adjusting the end cap to be tested so that its axis coincides with the axis of the test roll. S5. Drive the end cap under test to rotate by the support adjustment component, and adjust the end cap under test to the required angle; S6. Drive the clamping frame to push the end cap under test to fit against the connecting flange; drive the internal sealing mechanism to seal the internal hollow area of ​​the end cap under test with the sealing flange; S7. Fill the test roll with the test medium and test the sealing performance of the end cap to be tested.

Images