Post-curing impermeability detection device based on bridge support epoxy grouting material

Abstract

The invention relates to the technical field of epoxy grouting material detection, and discloses a cured anti-permeability detection device based on a bridge support epoxy grouting material, which comprises an anti-permeability instrument main body for detecting a test block, a plurality of test mold seats arranged on the table top of the anti-permeability instrument main body, and a plurality of test mold pieces arranged on the test mold seats, a clamping piece used for clamping a test block is arranged in the test mold piece, the test mold piece comprises a base and a top seat which are of an annular structure, a fixed cylinder of a circular truncated cone structure is fixedly connected between the base and the top seat, and a connecting ring is rotationally connected to the outer side wall of the base. The connecting ring is in threaded connection with the positioning table and the top seat, vertical accumulation of multiple test modules is achieved, physical output and danger of installation are reduced, and efficiency is improved; the sealing piece and the positioning piece are in linkage fit, gas can be automatically exhausted, automatic sealing is carried out, a stable liquid environment is created, meanwhile, rapid injection and discharging of liquid are facilitated, and it is guaranteed that impermeability detection is efficiently and accurately carried out.

Description

Technical Field

[0001] This invention relates to the field of epoxy grouting material testing technology, and in particular to a device for testing the post-curing impermeability of epoxy grouting material for bridge bearings. Background Technology

[0002] Epoxy grouting materials play a crucial role in bridge engineering. They ensure a tight, gapless bond between steel and rubber bearings and piers and beams, effectively improving the bridge's seismic performance. As the technology and application scenarios continue to evolve rapidly, synthesizing epoxy resins from renewable resources (such as vegetable oils, rosin, and glycerin) can improve its environmental performance while maintaining mechanical properties and ease of construction. However, with the changing performance of new epoxy grouting materials, their cured impermeability needs to be retested.

[0003] Among the many aspects of ensuring the quality and safety of bridge engineering, the testing of the impermeability of epoxy grouting materials is indispensable. Specifically, the epoxy grouting material must first be made into standard test blocks, which are then placed in a permeability analyzer for liquid pressure testing. The permeability data of the test blocks is analyzed to determine their permeability performance. Currently, permeability analyzers are time-consuming to use in a single test, and the number of test blocks tested each time is limited, making it difficult to improve overall testing efficiency. This has become a major bottleneck restricting the efficient implementation of testing work. Existing technology patent CN117890283A discloses a concrete permeability analyzer that allows several test specimens to be placed in a single mold via a bracket. A control system and a liquid supply system provide different water pressures to each mold, enabling the testing of the permeability performance of multiple groups of specimens in a single test, thereby greatly improving testing efficiency.

[0004] However, the aforementioned patent documents still have the following drawbacks: The weight of a single cylindrical or frustum-shaped standard test block is generally between 5KG and 10KG. When multiple test blocks are concentrated on the same bracket, the overall weight of the mold increases significantly. This often requires multiple people to work together during the handling and disassembly of the mold, which not only increases physical exertion but also raises operational risks. Furthermore, when the mold is not full of test blocks, the cavity must be filled with water before testing can begin. This not only prolongs the pressurization and drainage time but also makes it difficult to completely expel residual air from the cavity, leading to deviations in the water pressure data of each mold and seriously affecting the accuracy and reliability of the test data. Summary of the Invention

[0005] Given the problems of long testing time, limited number of test blocks per test, and difficulty in handling and disassembling test molds in existing technologies, a post-curing impermeability testing device based on epoxy grouting material for bridge bearings is proposed.

[0006] Its purpose is to facilitate the step-by-step installation of multiple test blocks on the same mold base, and to automatically discharge gas, so as to make the sealed testing environment more balanced, while improving the pressurization and drainage speed.

[0007] The technical solution of the present invention is a device for testing the impermeability of cured epoxy grout for bridge bearings, comprising an impermeability instrument body for testing test blocks and multiple test mold seats set on the platform of the impermeability instrument body, and multiple test mold components set on the test mold seats, wherein the test mold components are provided with clamping components for clamping the test blocks. The test mold includes a ring-shaped base and a top seat. A fixed cylinder with a frustum-shaped structure is fixedly connected between the base and the top seat. A connecting ring is rotatably connected to the outer wall of the base. Multiple infusion channels are opened inside the base. Multiple liquid storage tanks are opened inside the top seat. A water pipe is connected between the vertically arranged infusion channels and the liquid storage tanks. A positioning component is fixedly connected to the top of the liquid storage tank. The positioning component is inserted into the infusion channel. A sealing component is provided inside the liquid storage tank. The clamping member includes a base plate detachably connected to the top seat, and a drive disk is rotatably connected to the bottom surface of the base plate. The device is connected to multiple clamping plates, which contract synchronously to clamp the test block.

[0008] Furthermore, the lower side of the inner wall of the connecting ring is provided with an internal thread, and a positioning platform is fixedly connected to the top surface of the test mold base. External threads are fixed on the outer wall of the positioning platform and the outer wall of the top base, and the external threads are adapted to the internal threads.

[0009] Furthermore, the top surface of the positioning platform, the top surface of the top seat, the bottom surface and the top surface of the base are all provided with annular sealing grooves, and sealing rings are placed on the annular sealing grooves of the positioning platform and the top seat.

[0010] Furthermore, an annular rotating groove is provided on the outer wall of the base, and multiple bolts are connected to the connecting ring in an annular, equally spaced threaded manner. One end of each bolt passes through the connecting ring and extends into the annular rotating groove.

[0011] Furthermore, the positioning component includes a cover plate that engages with the upper end of the liquid storage tank, and a positioning tube head with a frustum-shaped structure is fixedly connected to the top surface of the cover plate, and the cover plate communicates with the positioning tube head; The infusion channel includes a positioning cavity formed on the bottom surface of the base. The positioning cavity is adapted to the positioning tube head. The infusion channel also includes an infusion trough and an infusion hole that communicate with the positioning cavity. The infusion trough is arranged radially along the base and communicates with the inner side wall of the base. The infusion hole is communicated with one end of the water pipe.

[0012] Furthermore, the sealing element includes a buoyancy chamber disposed within the liquid storage tank, and a sealing plate is fixedly connected to the top surface of the buoyancy chamber; A connecting rod is fixedly connected to the sealing plate, the upper end of the connecting rod passes through the positioning component and extends to the upper side of the positioning component, and a baffle is fixedly connected inside the infusion hole.

[0013] Furthermore, the top surface of the top seat is provided with a groove, and multiple positioning rods are fixedly connected in a ring at equal intervals on the inner side wall of the groove. Multiple positioning grooves are provided in a ring at equal intervals on the outer side wall of the bottom plate. The positioning grooves are L-shaped and engage with the positioning rods.

[0014] Furthermore, the drive plate includes a circular plate and a spiral strip fixed to the top surface of the circular plate. The bottom surface of the base plate is fixedly connected with multiple fixed blocks in an annular pattern at equal intervals. The circular plate is rotatably engaged with the fixed blocks. A T-shaped rod is rotatably connected to the base plate. The bottom of the T-shaped rod is connected and fixed to the circular plate. The clamping plate has an L-shaped structure and is slidably connected to the fixed block. The clamping plate has multiple arc-shaped grooves on the side facing the drive disk, and the spiral strip slides in contact with the corresponding arc-shaped grooves.

[0015] Furthermore, a flow-guiding airbag with an annular structure is fixedly connected to the top surface of the base plate, and the flow-guiding airbag has a triangular cross-section. The outer wall of the T-shaped rod is provided with an annular toothed groove, and multiple positioning toothed plates are provided on the outer side of the annular toothed groove. The positioning toothed plates are slidably connected to the top surface of the bottom plate and are fixedly connected to the air duct.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the threaded connection between the connecting ring and the positioning platform and top seat, multiple test molds can be vertically accumulated, reducing the physical labor and danger of installation and improving efficiency; the linkage between the sealing element and the positioning element can automatically discharge gas and perform automatic sealing, creating a stable liquid environment, while facilitating the rapid injection and discharge of liquid, ensuring efficient and accurate anti-permeability testing.

[0017] 2. The design allows for quick connection between the clamping component and the test mold, eliminating the need for complex tools and operations. The clamping component directly holds the large end of the test block and places it directly into the test mold, greatly simplifying the process of placing the test block into the test mold. Compared to the traditional operation that requires flipping the test mold, this design allows the test block to be placed vertically from top to bottom into the test mold, significantly improving operational efficiency.

[0018] 3. Through the design of the flow-guiding airbag, when the cavity of the test mold is filled with liquid, the liquid pressure causes the flow-guiding airbag to deform towards the center, pushing the positioning tooth plate to engage with the annular tooth groove, forming a rotation limit on the T-shaped rod, further enhancing the clamping stability of the clamping plate on the test block. When the test mold is discharged from the liquid, the flow-guiding airbag gradually returns to its original shape. The thrust generated by its elastic reset can effectively accelerate the flow speed of the liquid in the cavity, avoid liquid residue accumulation, greatly reduce the waiting time for cleaning after the test, accelerate equipment turnover, and improve the overall test efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the main body of the permeability tester and the test mold base of the present invention; Figure 3 This is a vertically disassembled schematic diagram of the test mold base, positioning platform, and test mold component structure of the present invention; Figure 4 This is a horizontally dissected schematic diagram of the prototype structure of the present invention; Figure 5 This is a schematic cross-sectional view of the prototype structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point A in the middle; Figure 7 For the present invention Figure 5 Enlarged schematic diagram of the structure at point B; Figure 8 This is a schematic diagram showing the connection state of the positioning component and the infusion channel structure of the present invention; Figure 9 This is a bottom view of the clamping member structure of the present invention; Figure 10 This is a schematic diagram of the spiral strip and clamping plate structure of the present invention; Figure 11 This is a schematic cross-sectional view of the base plate and airflow guiding airbag structure of the present invention; Figure 12 For the present invention Figure 11 Enlarged schematic diagram of the structure at point C; Figure 13 This is a schematic diagram showing the assembly state of the clamping component, test block, and fixing cylinder structure of the present invention.

[0020] In the picture: 1. Main body of the permeability analyzer; 2. Test mold base; 3. Test mold piece; 31. Base; 32. Top seat; 33. Fixing cylinder; 34. Connecting ring; 35. Annular rotating groove; 36. Positioning rod; 4. Clamping component; 41. Base plate; 42. Positioning groove; 43. Circular plate; 44. Spiral strip; 45. Fixing block; 46. Clamping plate; 47. T-shaped rod; 48. Arc groove; 5. Positioning platform; 6. Water pipe; 7. Infusion channel; 71. Positioning cavity; 72. Infusion tank; 73. Infusion hole; 8. Storage tank; 9. Sealing component; 91. Buoyancy chamber; 92. Sealing plate; 10. Positioning component; 101. Cover plate; 102. Positioning tube head; 11. Connecting rod; 12. Baffle; 13. Annular toothed groove; 14. Positioning toothed plate; 15. Guide air bag. Detailed Implementation

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Example 1, referring to Figures 1-9 This invention provides a device for testing the permeability of cured epoxy grout for bridge bearings, comprising a permeability meter body 1 and multiple test mold seats 2 disposed on the platform of the permeability meter body 1, and multiple test mold parts 3 disposed on the test mold seats 2. Each test mold part 3 has a clamping member 4 for holding the test block. Each test mold part 3 includes a base 31 and a top seat 32 with an annular structure. A fixed cylinder 33 with a frustum-shaped structure is fixedly connected between the base 31 and the top seat 32. A connecting ring is rotatably connected to the outer wall of the base 31. 34. The base 31 has multiple infusion channels 7 inside, and the top seat 32 has multiple storage tanks 8 inside. The vertically arranged infusion channels 7 and the storage tanks 8 are connected by a water pipe 6. The top of the storage tank 8 is fixedly connected to a positioning component 10, which is inserted into the infusion channel 7. The storage tank 8 is provided with a sealing component 9. The clamping component 4 includes a base plate 41 that is detachably connected to the top seat 32. The bottom surface of the base plate 41 is rotatably connected to a drive plate. Multiple clamping plates 46 are movably connected to the drive plate. The multiple clamping plates 46 retract synchronously to clamp the test block.

[0023] Specifically, when multiple clamping plates 46 retract synchronously, they can clamp the test block. After the bottom plate 41 is connected to the top seat 32, the test block is placed inside the test mold 3. The connecting ring 34 of the test mold 3 can be connected to the test mold base 2. Subsequently, another test mold 3 containing a test block can be connected to the top seat 32 on the test mold 3 connected to the test mold base 2 through its own connecting ring 34, realizing the vertical accumulation of multiple test blocks. By installing in stages, the physical exertion and danger are reduced. When the upper test mold 3 is connected to the lower test mold 3, the positioning part 10 on the lower test mold 3 is inserted into the infusion channel 7 at the bottom of the upper test mold 3, so that the upper and lower test molds 3 are connected by water pipe 6. By vertically stacking multiple test molds 3 containing test blocks, the need for simultaneous testing of multiple test blocks is met, improving testing efficiency and reducing the space and equipment resources required for testing. This facilitates large-scale testing. The step-by-step installation method, using connecting rings 34 to connect the test molds 3, significantly reduces physical exertion and labor intensity compared to installing multiple test blocks at once. It also improves work efficiency and avoids potential dangers such as falling when installing multiple test blocks at once, reducing safety hazards, lowering operational risks, and ensuring the safety of operators.

[0024] Reference Figures 3-4 The inner side of the connecting ring 34 has an internal thread, and the top surface of the mold base 2 is fixedly connected to the positioning table 5. The outer side of the positioning table 5 and the outer side of the top seat 32 are both fixed with external threads, which are compatible with the internal threads.

[0025] Specifically, the tight connection achieved through the interlocking of internal and external threads effectively prevents the mold 3 from loosening or shifting during the test, ensuring that the test block remains stable throughout the impermeability test and providing a solid guarantee for the accuracy of the test data. Moreover, the threaded connection method is simple to operate, and the mold 3 can be quickly installed and disassembled with the mold base 2 and the mold 3 by simply rotating. The external threads of the positioning table 5 and the top seat 32 are uniformly adapted to the internal threads of the connecting ring 34, allowing for flexible combination of the various molds 3. Whether using a single mold 3 or accumulating multiple vertically, it can be quickly assembled to meet different test scales and requirements.

[0026] Reference Figure 4 The top surface of the positioning platform 5, the top surface of the top seat 32, the bottom surface and the top surface of the base 31 are all provided with annular sealing grooves, and sealing rings are placed on the annular sealing grooves of the positioning platform 5 and the annular sealing grooves of the top seat 32.

[0027] Specifically, after the base 31 is connected to the positioning platform 5 or the top seat 32 of another test mold 3, the sealing ring and the annular sealing groove can effectively fill the gap when the test mold 3 is connected to the test mold base 2 and the test mold 3, prevent the test liquid from leaking, and ensure that the anti-permeability test is carried out in a closed environment.

[0028] Reference Figure 4 An annular rotating groove 35 is provided on the outer wall of the base 31. Multiple bolts are connected to the connecting ring 34 in an annular and equally spaced thread. One end of the bolt passes through the connecting ring 34 and extends into the annular rotating groove 35.

[0029] Specifically, the connecting ring 34 is positioned outside the base 31 by the rotational engagement of the bolt and the annular rotating groove 35. By rotating the connecting ring 34, it can be easily and quickly connected and disassembled with the positioning table 5 or the top seat 32 of another test mold 3.

[0030] It should be noted that the bolt diameter is smaller than the height of the annular rotating groove 35, giving the connecting ring 34 a margin of movement in the vertical space. This allows the base 31 to make full contact and find the correct position when it is connected to the positioning table 5 or the top seat 32 of other test mold 3. Then, a tight seal can be achieved by adjusting the connecting ring 34, which effectively avoids the problem of poor sealing caused by position deviation and further improves the sealing performance of the test device and the accuracy of the test data.

[0031] The outer surface of the connecting ring 34 is fixed with multiple anti-slip textures in a ring shape at equal intervals, which increases the friction force when the operator rotates the ring, thus improving the accuracy of operation.

[0032] Reference Figures 5-8 The positioning component 10 includes a cover plate 101 that engages with the upper end of the liquid storage tank 8. A positioning tube head 102 with a frustum-shaped structure is fixedly connected to the top surface of the cover plate 101, and the cover plate 101 communicates with the positioning tube head 102. The infusion channel 7 includes a positioning cavity 71 opened on the bottom surface of the base 31. The positioning cavity 71 is adapted to the positioning tube head 102. The infusion channel 7 also includes an infusion trough 72 and an infusion hole 73 that communicate with the positioning cavity 71. The infusion trough 72 is arranged radially along the base 31 and communicates with the inner side wall of the base 31. The infusion hole 73 is communicated with one end of the water pipe 6.

[0033] Specifically, the connection design between the positioning component 10 and the infusion channel 7 automatically forms a continuous water flow channel after the test mold 3 is connected. The pressure supply system can smoothly allow the liquid to flow through the positioning tube head 102, positioning cavity 71, infusion tank 72, and infusion hole 73 via the water pipe 6, ensuring the continuity and stability of the water flow path during the anti-permeability test and providing a guarantee for accurately simulating the test environment. At the same time, the adaptable plug-in design of the frustum-shaped positioning tube head 102 and the positioning cavity 71 provides precise guidance for the vertical connection of the test mold 3, not only achieving preliminary positioning but also effectively preventing lateral misalignment of the test mold 3 before threaded connection. This pre-positioning structure enhances the stability of the test mold 3 during the connection process.

[0034] When at least two mold pieces 3 are connected to the mold base 2, the pressure supply system starts working, and liquid flows out from the mold base 2. First, the liquid enters the bottommost mold piece 3 until it is full. After the bottommost mold piece 3 is full, the excess liquid continues to flow upward through the water pipe 6 inside the mold piece 3. After rising along the water pipe 6, the liquid flows into the infusion tank 72 at the bottom of the upper mold piece 3. This cycle continues until all mold pieces 3 are full. This design brings significant benefits: first, it achieves orderly liquid filling, ensuring that each mold piece 3 is fully wetted by the liquid, creating stable and consistent initial conditions for the impermeability test, and ensuring the accuracy of the test results; second, it establishes an automatic liquid conduction path by relying on the connection structure between the water pipe 6 and the infusion tank 72 between the mold pieces 3.

[0035] Reference Figures 7-8 The sealing element 9 includes a buoyancy chamber 91 disposed in the liquid storage tank 8, and a sealing plate 92 is fixedly connected to the top surface of the buoyancy chamber 91; a connecting rod 11 is fixedly connected to the sealing plate 92, the upper end of the connecting rod 11 passes through the positioning element 10 and extends to the upper side of the positioning element 10, and a baffle 12 is fixedly connected inside the infusion hole 73.

[0036] Specifically, when liquid is injected into the cavity of the mold 3, the air inside the cavity rises along the water pipe 6 and is discharged to the outside through the storage tank 8. This venting process effectively avoids gas residue, creating a stable liquid environment inside the mold 3 and ensuring the accuracy of subsequent tests. As liquid continues to be injected, once the mold 3 is completely filled, excess liquid continues to flow upward through the water pipe 6 into the upper storage tank 8. At this time, the inflow of liquid causes the buoyancy chamber 91 inside the storage tank 8 to rise. As the buoyancy chamber 91 continues to rise, its top sealing plate 92 gradually comes into close contact with the bottom surface of the cover plate 101, ultimately achieving self-sealing of the storage tank 8. This self-sealing mechanism ensures that a completely closed environment is formed inside the mold 3, preventing liquid leakage and external interference, and maintaining stable test conditions.

[0037] When multiple mold pieces 3 are vertically connected on the same mold base 2, the liquid transfer and structural linkage mechanism operates as follows: The baffle 12 inside the upper mold piece 3 abuts against the connecting rod 11 inside the lower mold piece 3. Because the weight of the mold piece 3 itself is greater than the buoyancy generated by the buoyancy chamber 91, the sealing plate 92 cannot float up and contact the cover plate 101. When liquid is injected into the lower mold piece 3, after its cavity is completely filled with liquid, the excess liquid will flow upward into the upper mold piece 3 through the positioning tube head 102 along the connecting channel, realizing the orderly transfer of liquid between multiple mold pieces.

[0038] Understandably, a sealing gasket is fixed on the top surface of the sealing plate 92, and the bottom surface of the cover plate 101 is a smooth plane, so that the sealing plate 92 and the cover plate 101 can achieve effective sealing when they come into contact.

[0039] It should be noted that the buoyancy chamber 91 has a concave structure design, with the concave part facing the connection between the liquid storage tank 8 and the water pipe 6. The concave structure design can avoid obstructing the flow of liquid.

[0040] Example 2, refer to Figure 5 , Figure 9 and Figure 10 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a groove is provided on the top surface of the top seat 32, and multiple positioning rods 36 are fixedly connected in a ring at equal intervals on the inner side wall of the groove. Multiple positioning grooves 42 are provided in a ring at equal intervals on the outer side wall of the bottom plate 41. The positioning grooves 42 have an L-shaped structure and are engaged with the positioning rods 36.

[0041] Specifically, the base plate 41 has a cylindrical structure that precisely matches the groove on the top surface of the top seat 32, with its outer diameter matching the inner diameter of the groove. During installation, first align the vertical part of the positioning groove 42 on the base plate 41 with the positioning rod 36 of the top seat 32, so that the positioning rod 36 is embedded in the vertical part of the positioning groove 42. Then, place the base plate 41 stably in the groove, and then rotate the base plate 41 horizontally so that the horizontal part of the positioning groove 42 is tightly engaged with the positioning rod 36, thereby achieving a quick and stable connection between the base plate 41 and the top seat 32.

[0042] Reference Figure 9 and Figure 10 The drive plate includes a circular plate 43 and a spiral strip 44 fixed on the top surface of the circular plate 43. The bottom surface of the base plate 41 is fixedly connected with multiple fixed blocks 45 in an annular shape at equal intervals. The circular plate 43 and the fixed blocks 45 are rotatably connected. A T-shaped rod 47 is rotatably connected to the base plate 41. The bottom of the T-shaped rod 47 is connected and fixed to the circular plate 43. The clamping plate 46 has an L-shaped structure and is slidably connected to the fixed blocks 45. Multiple arc-shaped grooves 48 are opened on the side of the clamping plate 46 facing the drive plate. The spiral strip 44 slides in contact with the corresponding arc-shaped grooves 48.

[0043] Specifically, when the T-shaped rod 47 is rotated, its bottom drives the circular plate 43 to rotate synchronously. The spiral strip 44 and the arc groove 48 on the clamping plate 46 cooperate with each other. As the circular plate 43 rotates, the spiral strip 44 slides in the arc groove 48, driving the clamping plate 46 to translate along the fixed block 45. Since multiple clamping plates 46 are connected to the cooperation structure of the spiral strip 44 and the arc groove 48, all clamping plates 46 can expand or contract synchronously. When all clamping plates 46 contract synchronously, the test block can be firmly clamped, and the self-locking characteristic generated by the cooperation of the spiral strip 44 and the arc groove 48 ensures that the clamping plate 46 always maintains a stable clamping state on the test block during the test, preventing the test block from loosening.

[0044] It should be noted that the clamping plate 46 adopts an L-shaped acute-angle bend design. When multiple clamping plates 46 cooperate with each other, they can precisely fit the contour of the large end of the frustum-shaped test block, forming a stable clamping and fixation. At the same time, the fixing cylinder 33 of the test mold 3 has a frustum-shaped structure, with its large end facing upwards. This ingenious design allows the clamped test block to be directly and vertically placed into the test mold 3 from top to bottom. Compared with the complicated process of traditional operation, which requires flipping the test mold 3 before placing the test block, this method greatly simplifies the test block installation steps and significantly improves the convenience and efficiency of the test operation.

[0045] The clamping part under the lower side of the clamping plate 46 is provided with an anti-slip pad, and the surface of the anti-slip pad is provided with multiple anti-slip grooves. The anti-slip pad can further increase the stability when clamping the test block. The rest of the structure is the same as that in Example 1.

[0046] It should be noted that, refer to Figure 13 Before conducting the impermeability test, multiple rubber rings are first placed on the curved surface of the test block. Then, the test block is securely clamped using clamping device 4, and finally placed entirely into the test mold 3. The rubber rings, with their excellent elastic deformation capability, tightly adhere to the outer wall of the test block and the inner wall of the fixing cylinder 33, forming a reliable sealing structure. This design allows the small end of the test block to directly contact the liquid. During the test, the liquid pressure acts on the small end of the test block, thereby achieving accurate testing of the impermeability performance of the test block.

[0047] Example 3, referring to Figure 11 and Figure 12 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that: a flow guide airbag 15 with an annular structure is fixedly connected to the top surface of the base plate 41, and the flow guide airbag 15 has a triangular cross-section; an annular toothed groove 13 is provided on the outer wall of the T-shaped rod 47, and a plurality of positioning toothed plates 14 are provided on the outer side of the annular toothed groove 13. The positioning toothed plates 14 are slidably connected to the top surface of the base plate 41 and are fixedly connected to the flow guide airbag 15.

[0048] Specifically, when the cavity of the mold 3 is filled with liquid, the liquid pressure causes the guide airbag 15 to deform towards the center, which in turn pushes the positioning toothed plate 14 connected to it to move until the positioning toothed plate 14 and the annular toothed groove 13 are engaged. Since there is a sliding limit relationship between the positioning toothed plate 14 and the base plate 41, this engagement action can limit the rotation of the T-shaped rod 47, further enhancing the clamping stability of the clamping plate 46 on the test block during the pressurization test. When the mold 3 begins to discharge liquid, the guide airbag 15 gradually returns to its original shape, and the thrust generated by its elastic reset can accelerate the flow rate of liquid in the cavity of the mold 3, effectively preventing liquid residue and accumulation in the mold 3. By using the liquid pressure-triggered limiting mechanism, through the linkage of the guide airbag 15, the positioning toothed plate 14 and the annular toothed groove 13, the rotation of the T-shaped rod 47 is automatically limited, preventing the test block from shifting due to the loosening of the clamping plate 46 during the pressurization process, thus ensuring the accuracy of the test data. The pushing action of the air bladder 15 on the liquid during recovery can quickly empty the liquid in the test mold 3, reducing the post-test cleaning waiting time and accelerating equipment turnaround. The rest of the structure is the same as that in Example 2.

[0049] Based on embodiments 1-3, the working principle of this invention is as follows: The small end of the test block is placed flat on the table, the fixing block 45 of the clamping member 4 is set on the top surface of the test block, the T-shaped rod 47 is rotated to clamp the test block with the clamping plate 46, and then the bottom plate 41 is engaged with the positioning rod 36 of the top seat 32 through the L-shaped positioning groove 42 to complete the assembly of the test block and the test mold 3; the connecting ring 34 is threadedly connected to the positioning table 5 to connect and fix the test mold 3 to the test mold base 2, and other test molds 3 can be threadedly connected to the top seat 32 of the installed test mold 3 through the connecting ring 34; the pressure supply system injects liquid from the test mold base 2, preferentially filling the bottom test mold 3. After filling, excess liquid flows through water pipe 6 and liquid delivery channel 7, through the channel formed by the insertion of positioning tube head 102 of lower test mold 3 and positioning cavity 71 of upper test mold 3, to achieve orderly liquid filling of multiple test molds; the pressure supply system gradually pressurizes at fixed intervals, thereby completing the permeability test of the test block.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A device for testing the permeability resistance of cured epoxy grout for bridge bearings, comprising a permeability tester body (1) for testing test blocks and multiple test mold seats (2) set on the platform of the permeability tester body (1), characterized in that: It also includes multiple test molds (3) set on the test mold base (2), and the test molds (3) are provided with clamping parts (4) for clamping the test blocks. The test mold (3) includes a base (31) and a top seat (32) with an annular structure. A fixed cylinder (33) with a frustum structure is fixedly connected between the base (31) and the top seat (32). A connecting ring (34) is rotatably connected to the outer wall of the base (31). Multiple infusion channels (7) are opened inside the base (31). Multiple liquid storage tanks (8) are opened inside the top seat (32). A water pipe (6) is connected between the vertically arranged infusion channels (7) and the liquid storage tanks (8). A positioning component (10) is fixedly connected to the top of the liquid storage tank (8). The positioning component (10) is inserted into the infusion channel (7). A sealing component (9) is provided inside the liquid storage tank (8). The clamping member (4) includes a base plate (41) detachably connected to the top seat (32). A drive disk is rotatably connected to the bottom surface of the base plate (41). Multiple clamping plates (46) are movably connected to the drive disk. The multiple clamping plates (46) retract synchronously to clamp the test block.

2. The device for testing the impermeability of cured epoxy grouting material for bridge bearings according to claim 1, characterized in that: The inner side of the connecting ring (34) is provided with an internal thread, and the top surface of the test mold base (2) is fixedly connected with a positioning platform (5). The outer side wall of the positioning platform (5) and the outer side wall of the top seat (32) are both provided with external threads, and the external threads are compatible with the internal threads.

3. The device for testing the post-curing impermeability of epoxy grouting material for bridge bearings according to claim 2, characterized in that: The top surface of the positioning platform (5), the top surface of the top seat (32), the bottom surface and the top surface of the base (31) are all provided with annular sealing grooves, and sealing rings are placed on the annular sealing grooves of the positioning platform (5) and the annular sealing grooves of the top seat (32).

4. The device for testing the post-curing impermeability of epoxy grouting material for bridge bearings according to claim 1, characterized in that: The base (31) has an annular rotating groove (35) on its outer side wall. The connecting ring (34) has multiple bolts connected in annular and equally spaced threads. One end of each bolt passes through the connecting ring (34) and extends into the annular rotating groove (35).

5. The device for testing the post-curing impermeability of epoxy grouting material for bridge bearings according to claim 1, characterized in that: The positioning component (10) includes a cover plate (101) that is snapped into the upper end of the liquid storage tank (8). A positioning tube head (102) with a frustum-shaped structure is fixedly connected to the top surface of the cover plate (101). The cover plate (101) and the positioning tube head (102) are in communication. The infusion channel (7) includes a positioning cavity (71) opened on the bottom surface of the base (31). The positioning cavity (71) is adapted to the positioning tube head (102). The infusion channel (7) also includes an infusion trough (72) and an infusion hole (73) communicating with the positioning cavity (71). The infusion trough (72) is arranged radially along the base (31) and communicates with the inner side wall of the base (31). The infusion hole (73) is connected to one end of the water pipe (6).

6. The device for testing the post-curing impermeability of epoxy grouting material for bridge bearings according to claim 5, characterized in that: The sealing element (9) includes a buoyancy chamber (91) disposed in the liquid storage tank (8), and a sealing plate (92) is fixedly connected to the top surface of the buoyancy chamber (91). A connecting rod (11) is fixedly connected to the sealing plate (92). The upper end of the connecting rod (11) passes through the positioning member (10) and extends to the upper side of the positioning member (10). A baffle (12) is fixedly connected inside the infusion hole (73).

7. The device for testing the post-curing impermeability of epoxy grouting material for bridge bearings according to claim 1, characterized in that: The top surface of the top seat (32) is provided with a groove, and multiple positioning rods (36) are fixedly connected in a ring at equal intervals on the inner side wall of the groove. Multiple positioning grooves (42) are provided in a ring at equal intervals on the outer side wall of the bottom plate (41). The positioning grooves (42) are L-shaped and are engaged with the positioning rods (36).

8. The device for testing the post-curing impermeability of epoxy grouting material for bridge bearings according to claim 1, characterized in that: The drive plate includes a circular plate (43) and a spiral strip (44) fixed on the top surface of the circular plate (43). The bottom surface of the base plate (41) is fixedly connected with multiple fixed blocks (45) at equal intervals in a ring. The circular plate (43) and the fixed blocks (45) are rotatably engaged. A T-shaped rod (47) is rotatably connected on the base plate (41). The bottom of the T-shaped rod (47) is connected and fixed to the circular plate (43). The clamp (46) has an L-shaped structure and is slidably connected to the fixed block (45). The clamp (46) has multiple arc-shaped grooves (48) on the side facing the drive disk, and the spiral strip (44) slides in contact with the corresponding arc-shaped groove (48).

9. The device for testing the post-curing impermeability of epoxy grouting material for bridge bearings according to claim 8, characterized in that: The bottom plate (41) is fixedly connected to a ring-shaped air bladder (15) on its top surface. The air bladder (15) has a triangular cross-section. The outer wall of the T-shaped rod (47) is provided with an annular toothed groove (13), and a plurality of positioning toothed plates (14) are provided on the outer side of the annular toothed groove (13). The positioning toothed plates (14) are slidably connected to the top surface of the bottom plate (41) and are connected and fixed to the air duct (15).

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