A compression creep test fixture and its compression assembly

Abstract

This invention relates to the field of creep testing technology, and discloses a clamping assembly for compression creep testing. The clamping assembly includes a fixed frame, a transmission component vertically slidably connected to the fixed frame, a sliding component connected to the fixed frame, a pressure-resistant shell having a first cavity, a push rod and a compression shaft vertically slidably connected to the pressure-resistant shell, and an abutment fixed to the compression shaft. The first end of the compression shaft passes through the pressure-resistant shell into the pressure-resistant cavity. One end of the push rod extends into the first cavity, and the other end is connected to the transmission component. The sliding component has a first inclined surface and a second inclined surface. The side wall of the transmission component has a third inclined surface that mates with the first inclined surface. The abutment has a fourth inclined surface that mates with the second inclined surface. When the transmission component presses down, it pushes the sliding component to move from a first position to a second position. This clamping assembly can simultaneously simulate a marine hydraulic environment and apply mechanical stress to the test block with a single operation. Furthermore, relying on mechanical limiting, it can achieve long-term stable maintenance of the marine hydraulic environment.

Description

Technical Field

[0001] This invention relates to the field of creep testing technology, and in particular to a clamping assembly for compression creep testing. Background Technology

[0002] In recent years, titanium alloys have been widely used in deep-sea exploration. However, during the long-term use of equipment such as deep-sea submersibles and offshore platforms, titanium alloy materials are subjected to complex stress states. Especially at different depths and in different environments, the stress on the material is not limited to a single tensile force, but is often accompanied by compressive and torsional stresses, making titanium alloys prone to creep. Titanium alloy creep refers to the phenomenon that the plastic deformation of the material increases over time under constant stress below the yield strength.

[0003] To test the long-term stability and reliability of titanium alloys under actual working conditions, it is necessary to develop a creep test fixture capable of simulating the creep behavior of titanium alloys under complex marine stress environments. For example, Chinese patent CN119901574A discloses a biaxial and uniaxial creep test fixture that can convert single tensile stress into biaxial compressive stress to simulate the creep behavior of titanium alloys under complex marine stress environments.

[0004] However, the above-mentioned creep test fixture requires a multi-stage operation. First, the lower box is driven to simulate the marine hydraulic environment, and then the longitudinal rod and transverse pressure block are driven to apply mechanical stress to the test block, which is complicated. Moreover, the fixture relies on the magnetic suction cup on the damping block to attract the fixed block of the push rod to maintain the hydraulic stability in the pressure chamber, which is unstable and difficult to maintain the ideal adsorption state for a long time in actual operation. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a clamping assembly for a compression creep test fixture. This clamping assembly can simultaneously simulate the marine hydraulic environment and apply mechanical stress to the test block with a single operation, making the operation process simple. At the same time, relying on the mechanical limiting method, it can achieve long-term stable maintenance of the marine hydraulic environment.

[0006] The specific technical solution of the present invention is as follows: a clamping assembly for a compression creep test fixture, comprising a fixed frame, a transmission component vertically slidably connected to the fixed frame, a sliding component connected to the fixed frame, a pressure-resistant shell having a pressure-resistant cavity, a push rod and a compression shaft vertically slidably connected to the pressure-resistant shell, and an abutment fixed to the compression shaft. The first end of the compression shaft passes through the pressure-resistant shell into the pressure-resistant cavity. The first end of the compression shaft is provided with a partition plate that divides the pressure-resistant cavity into a first cavity and a second cavity. The first end of the push rod passes through the pressure-resistant shell into the first cavity. The second end of the push rod is connected to the transmission component. The sliding component is provided with a first inclined surface and a second inclined surface. The side wall of the transmission component is provided with an inclined third inclined surface. The abutment is provided with a fourth inclined surface. The third inclined surface cooperates with the first inclined surface for transmission, and the second inclined surface cooperates with the fourth inclined surface for transmission. The sliding component has a first position and a second position. The sliding component is provided with a first elastic component that keeps it in the first position. When the transmission component presses down, it pushes the sliding component to move from the first position to the second position. The transmission component has a first vertical surface located above the third inclined surface on its side wall. During the vertical movement of the transmission component, the third inclined surface first abuts against the first inclined surface, and then the second inclined surface abuts against the fourth inclined surface, driving the abutting component and the compression shaft to move downward. Then, it switches to the first vertical surface to contact the sliding component. The sliding component remains in the second position and the abutting component remains stationary. Alternatively, the abutment is provided with a first locking plane, and the sliding member is provided with a second locking plane. Both the first and second locking planes are parallel to the sliding direction of the sliding member. The third inclined surface first abuts against the first inclined surface. During the vertical movement of the transmission member, the second inclined surface first abuts against the fourth inclined surface, driving the abutment and the compression shaft to move downward. Then, the second locking plane abuts against the first locking plane, and the sliding member moves laterally to the second position while the abutment remains stationary.

[0007] In the aforementioned clamping assembly, when the transmission component presses down, it first drives the push rod connected to it to move down synchronously. The first end of the push rod extends into the first cavity of the pressure-resistant shell. Simultaneously, during the downward pressing process of the transmission component, the third inclined surface of its side wall first abuts against the first inclined surface of the sliding component, pushing the sliding component to overcome the force of the first elastic component and move from the first position to the second position. After the sliding component moves, its second inclined surface cooperates with the fourth inclined surface of the abutment component to drive the push rod and the compression shaft to move downward. The partition plate of the compression shaft moves down to compress the liquid in the first cavity, thereby quickly simulating the hydraulic pressure of the deep-sea environment. When the transmission component presses down to a certain height, the transmission component, the abutment component, and the sliding component can form a mechanical limit, the compression shaft stops moving downward, maintaining hydraulic stability, and the push rod continues to press down with the transmission component, applying vertical mechanical stress to the test block. Thus, through a single downward pressing action of the transmission component, the simulation of the marine hydraulic environment and the application of mechanical stress to the test block are realized simultaneously, and the operation process is simple. In the first scheme, after the third inclined plane disengages from the first inclined plane, the first vertical surface immediately contacts and locks the position of the sliding member, keeping the sliding member in the second position and achieving mechanical limiting. At this time, the second and fourth inclined planes remain in contact, ensuring that the contacting member and the compression shaft are stably stationary at the downward limit position, and the pressure in the first cavity remains constant. In the second scheme, after the second locking plane disengages from the first locking plane, the first vertical surface contacts the side wall of the sliding member, restricting the sliding member from retracting and keeping the sliding member in the second position, achieving mechanical limiting. At this time, the second and fourth inclined planes remain in contact, ensuring that the contacting member and the compression shaft are stably stationary at the downward limit position, and the pressure in the first cavity remains constant. Therefore, this application uses a mechanical limiting method to lock the pressure in the first cavity, which has high stability and can achieve long-term stable maintenance in marine hydraulic environments.

[0008] Optionally, the slider is provided with a third locking plane parallel to the first vertical plane. When the slider is in the second position, the first vertical plane and the third locking plane abut against each other.

[0009] In the above technical solution, the contact area between the transmission component and the sliding component is increased by the coordinated contact between the first vertical surface and the third locking plane, compared with the limiting method of line contact or point contact, thereby improving the stability and load-bearing capacity of the mechanical limiting.

[0010] Optionally, the compression shaft is threadedly connected to an upper clamping member and a lower clamping member, which clamp the abutment member.

[0011] In the above technical solution, by adjusting the connection position of the upper clamping member and the lower clamping member with the compression shaft, the fixed height of the abutment member on the compression shaft can be changed, thereby adjusting the extreme position of the compression shaft downward, and thus adjusting the pressure in the first cavity to adapt to deep-sea pressure simulation under different test requirements.

[0012] Optionally, the push rod and the compression shaft are coaxially arranged, and the compression shaft is sleeved on the outside of the push rod.

[0013] The above technical solution saves volume and improves structural compactness, making the force transmission more concentrated and stable when the transmission component is pressed down, and reducing the risk of off-center load.

[0014] Optionally, the first end of the push rod is provided with a clamping block with a diameter larger than that of the push rod, so that the partition plate is lifted by the clamping block when the push rod moves upward.

[0015] In the above technical solution, after the test is completed, each structure is reset. When the transmission component moves upward, the first vertical surface of its side wall first disengages from the third locking plane of the sliding component, releasing the limiting constraint on the sliding component. Under the action of the first elastic component, the sliding component resets to the first position, thereby releasing the abutment limitation on the abutment component. At the same time, the transmission component synchronously drives the push rod connected to it to move upward. The pressing block at the end of the push rod contacts and lifts the partition plate, thereby driving the compression shaft and the abutment component fixed on the compression shaft to reset vertically upward synchronously, finally completing the reset of all components. The reset process is simple and convenient.

[0016] Optionally, the fixing frame is provided with a sliding groove, one end of the sliding member is connected to the sliding groove and slides along the extension direction of the sliding groove; the extension direction of the sliding groove is transverse; or, the sliding groove extends obliquely, and its extension direction has a component in the transverse direction.

[0017] In the above technical solution, the chute provides a stable guide path for the sliding component, ensuring its smoothness and accuracy in lateral reciprocating motion.

[0018] Optionally, the number of the sliding members is two, and the two sliding members are disposed on opposite sides of the abutment member. The first elastic member is connected between the two sliding members so that the two sliding members are held in the first position.

[0019] In the above technical solution, the sliding members arranged symmetrically on both sides move synchronously under the action of the first elastic member, thereby improving the stability and reliability of the mechanism operation.

[0020] Optionally, a second elastic element is provided between the fixed frame and the transmission component. The second elastic element causes the transmission component to tend to return to its original position. When the external force is removed, the second elastic element pushes the transmission component to rise vertically along the fixed frame.

[0021] In the above technical solution, when the pressure on the transmission component is released, it automatically returns to its initial position under the action of the second elastic component, thereby driving each structure to reset and effectively improving the efficiency of equipment recycling.

[0022] The second specific technical solution of the present invention is: a clamping assembly for a compression creep test fixture, comprising a fixed frame, a transmission component vertically slidably connected to the fixed frame, a pressure-resistant shell having a pressure-resistant cavity, a push rod vertically slidably connected to the pressure-resistant shell, and a compression shaft horizontally slidably connected to the pressure-resistant shell. The first end of the compression shaft passes through the pressure-resistant shell into the pressure-resistant cavity. The first end of the compression shaft is provided with a partition plate that divides the pressure-resistant cavity into a first cavity and a second cavity. The first end of the push rod passes through the pressure-resistant shell into the first cavity. The second end of the push rod is connected to the transmission component. The second end of the compression shaft is provided with a fifth inclined surface. The side wall of the transmission component is provided with a vertically arranged inclined third inclined surface and a first vertical surface above the third inclined surface. The third inclined surface and the fifth inclined surface cooperate to drive the transmission. When the transmission component presses down, it drives the third inclined surface to abut against the fifth inclined surface, pushing the compression shaft to slide horizontally. During the vertical movement of the transmission component, when the first vertical surface contacts the compression shaft, the position of the compression shaft remains unchanged.

[0023] In the aforementioned clamping assembly, when the transmission component presses down, the third inclined surface of the transmission component abuts against the fifth inclined surface at the second end of the compression shaft. Since the compression shaft is designed for lateral sliding, the vertical pressure of the third inclined surface is converted into a lateral driving force, pushing the compression shaft to slide laterally along the pressure-resistant shell. The partition plate at the first end of the compression shaft moves inward, compressing the liquid in the first cavity, thus quickly simulating the hydraulic pressure of the deep-sea environment. When the transmission component presses down to a certain height, it mechanically limits the compression shaft, stopping its inward movement and maintaining hydraulic stability. The push rod continues to press down with the transmission component, applying vertical mechanical stress to the test block. Thus, through a single pressing action of the transmission component, the simulation of the marine hydraulic environment and the application of mechanical stress to the test block are simultaneously achieved, simplifying the operation. When the transmission component presses down to a certain height, the third and fifth inclined surfaces disengage, and the first vertical surface abuts against the fifth inclined surface of the compression shaft. At this point, the lateral displacement of the compression shaft is locked by the first vertical surface, preventing further sliding. The position of the partition plate is thus fixed, and the pressure in the first cavity remains constant. Therefore, this application uses a mechanical limiting method to lock the pressure in the first cavity, which has high stability and can achieve long-term stable maintenance of the marine hydraulic environment.

[0024] The third specific technical solution of the present invention is: a compression creep test fixture, including a base, an upper pressure plate that slides vertically on the base, a driving device for driving the upper pressure plate to move vertically, a transverse pressure block that slides laterally on the base, and a connecting rod connecting the transverse pressure block and the upper pressure plate. The two ends of the connecting rod are respectively hinged to the transverse pressure block and the upper pressure plate. When the driving device drives the upper pressure plate to move downward, the connecting rod pushes the transverse pressure block to slide laterally on the base. It also includes the aforementioned clamping assembly, wherein the fixing frame and pressure-resistant shell are mounted on the base, the transmission component is mounted on the upper pressure plate, and one end of the transverse pressure block extends into the first cavity.

[0025] In the aforementioned compression creep test fixture, the upper pressure plate moves downward, simultaneously driving the transverse pressure block to apply lateral pressure to the test block. At the same time, the clamping assembly establishes and locks the hydraulic pressure within the first chamber, allowing the test block to undergo compression creep testing under the combined action of vertical pressure, lateral pressure, and simulated deep-sea hydraulic pressure, realistically replicating the mechanical response process of materials in a deep-sea environment. The entire fixture achieves multi-dimensional stress loading through a single drive source, featuring a compact structure, precise control, and suitability for long-term stability testing.

[0026] Compared with the prior art, the present invention has at least the following advantages: (1) The clamping assembly can simultaneously simulate the marine hydraulic environment and apply mechanical stress to the test block with a single operation, and the operation process is simple; at the same time, relying on the mechanical limiting method, it can achieve long-term stable maintenance of the marine hydraulic environment; (2) The compression creep test fixture achieves multidimensional stress loading through a single drive source. It has a compact structure, precise control, and is suitable for long-term stability tests. Attached Figure Description

[0027] Figure 1 This is a first cross-sectional view of the clamping assembly of the present invention; Figure 2 This is a schematic diagram of the first structure of the clamping assembly of the present invention; Figure 3 This is a partial schematic diagram of the first structure of the clamping assembly of the present invention; Figure 4 This is a schematic diagram of a transmission structure in the first structure of the clamping assembly of the present invention; Figure 5 This is a schematic diagram of the second structure of the clamping assembly of the present invention; Figure 6 This is a schematic diagram of the compression creep test fixture of the present invention.

[0028] In the diagram: 1. Fixed frame; 2. Transmission component; 3. Sliding component; 4. Pressure-resistant shell; 5. Push rod; 6. Compression shaft; 7. Abutment component; 8. First elastic component; 9. Upper clamping component; 10. Lower clamping component; 11. Pressing block; 12. Base; 13. Upper pressure plate; 14. Drive device; 15. Transverse pressure block; 16. Connecting rod; 17. Second elastic component; 21. First vertical surface; 22. Third inclined surface; 31. First inclined surface; 32. Second inclined surface; 33. Fifth inclined surface; 34. Second locking plane; 35. Third locking plane; 41. Upper shell; 42. Lower shell; 61. Partition plate; 71. Fourth inclined surface; 72. First locking plane; 110. Pressure-resistant cavity; 111. First cavity; 112. Second cavity; 120. Slide groove; 130. Test block. Detailed Implementation

[0029] The present invention will now be described through specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Variations and advantages that can be conceived by those skilled in the art without departing from the spirit and scope of the inventive concept are included in the present invention, and the scope of protection of the present invention is defined by the appended claims and any equivalents thereof.

[0030] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Unless otherwise specified, the raw materials and equipment used in this invention are conventional in the art and can be obtained through conventional commercial means; unless otherwise specified, the methods used in this invention are conventional methods in the art.

[0031] In the following embodiments, for ease of understanding, the orientation descriptions of each structure of the compression creep test fixture and clamping assembly are based on their normal assembly and test working state. The direction of extension along the height of the fixed frame and the sliding direction of the transmission component is vertical, wherein the movement direction of the upper pressure plate near the base is vertically downward, and vice versa is vertically upward; the sliding direction of the transverse pressure block on the base and the sliding direction of the sliding component in the slide groove of the fixed frame are based on the horizontal extension direction perpendicular to the vertical, wherein the movement direction of the transverse pressure block extending into the first cavity is transversely inward, and vice versa is transversely outward.

[0032] Example 1: Reference Figure 1 to Figure 4 As shown, the present invention provides a clamping assembly for a compression creep test fixture, including a fixed frame 1, a transmission component 2 vertically slidably connected to the fixed frame 1, a sliding component 3 horizontally slidably connected to the fixed frame 1, a pressure-resistant shell 4 having a pressure-resistant cavity 110, a push rod 5 and a compression shaft 6 vertically slidably connected to the pressure-resistant shell 4, and an abutment component 7 fixed to the compression shaft 6. The first end of the compression shaft 6 passes through the pressure-resistant shell 4 into the pressure-resistant cavity 110. The first end of the compression shaft 6 is provided with a partition plate 61 that divides the pressure-resistant cavity 110 into a first cavity 111 and a second cavity 112. The first end of the push rod 5 passes through the pressure-resistant shell 4. Inside the first cavity 111, the second end of the push rod 5 is fixedly connected to the transmission component 2. The sliding component 3 is provided with a first inclined surface 31 and a second inclined surface 32. The side wall of the transmission component 2 is provided with an inclined third inclined surface 22. The abutment component 7 is provided with a fourth inclined surface 71. The third inclined surface 22 cooperates with the first inclined surface 31 for transmission, and the second inclined surface 32 cooperates with the fourth inclined surface 71 for transmission. The sliding component 3 has a first position away from the push rod 5 and a second position close to the push rod 5. The sliding component 3 is provided with a first elastic element 8 to keep it in the first position. When the transmission component 2 is pressed down, it pushes the sliding component 3 to move from the first position to the second position.

[0033] The pressure-resistant shell 4 is fixedly connected to the fixing frame 1. The fixing frame 1 forms a semi-enclosed structure around the pressure-resistant shell 4. The pressure-resistant shell 4 includes an upper shell 41 and a lower shell 42 threadedly connected to the upper shell 41. The first cavity 111 and the second cavity 112 are distributed from bottom to top. The test block 130 is placed on the lower shell 42. The side wall of the upper shell 41 is provided with a through hole for the transverse pressure block 15 to extend into the first cavity 111 to compress the test block 130. In this embodiment, the shell is provided with a through hole on each of the opposite sides so that the test block 130 can withstand the synchronous compressive force of the transverse pressure blocks 15 on both sides, ensuring that the transverse force on the test block 130 is balanced. The fixing frame 1 is provided with openings corresponding to the through holes on the opposite sides near the through holes. The upper shell 41 is located at the position corresponding to the second cavity 112. A vent is provided to connect with the outside world to balance the air pressure in the second chamber 112. When the compression shaft 6 moves the partition plate 61 downward to compress the first chamber 111, the volume of the second chamber 112 will increase simultaneously. The vent allows outside air to enter the second chamber 112 smoothly, preventing negative pressure from forming inside and hindering the normal movement of the partition plate 61. Similarly, when the partition plate 61 moves upward to reset, the air in the second chamber 112 can be discharged through the vent, ensuring smooth bidirectional movement of the partition plate 61. The first chamber 111 is provided with an openable liquid inlet and a liquid outlet to allow seawater to be introduced through the liquid inlet before testing and discharged through the liquid outlet after testing. During the testing process, both the liquid inlet and the liquid outlet are closed to keep the first chamber 111 sealed.

[0034] In the aforementioned clamping assembly, when the transmission component 2 is pressed down, it first drives the push rod 5 connected to it to move down synchronously. The first end of the push rod 5 extends into the first cavity 111 of the pressure-resistant shell 4. At the same time, during the pressing down process of the transmission component 2, the third inclined surface 22 of its side wall will first abut against the first inclined surface 31 of the sliding component 3, pushing the sliding component 3 to overcome the force of the first elastic component 8 and move from the first position to the second position. After the sliding component 3 moves, its second inclined surface 32 will cooperate with the fourth inclined surface 71 of the abutment component 7 to drive the push rod 5 and the compression shaft 6 to move down. The partition plate 61 of the compression shaft 6 moves down to compress the liquid in the first cavity 111, thereby quickly simulating the hydraulic pressure of the deep-sea environment. When the transmission component 2 is pressed down to a certain height, the transmission component 2, the abutment component 7 and the sliding component 3 can form a mechanical limit, the compression shaft 6 stops moving down, and the hydraulic pressure remains stable. The push rod 5 continues to press down with the transmission component 2, applying vertical mechanical stress to the test block 130. Thus, by using the single downward action of the transmission component 2, the simulation of the marine hydraulic environment and the application of mechanical stress to the test block 130 can be realized simultaneously, making the operation process simple; the pressure inside the first cavity 111 is locked by a mechanical limiting method, which has high stability and can achieve long-term stable maintenance of the marine hydraulic environment.

[0035] In this embodiment, as Figure 4As shown, the transmission component 2 has a first vertical surface 21 located above the third inclined surface 22 on its side wall. The first vertical surface 21 is parallel to the moving direction of the transmission component 2. During the vertical movement of the transmission component 2, the third inclined surface 22 first abuts against the first inclined surface 31, and then the second inclined surface 32 abuts against the fourth inclined surface 71, driving the abutting part 7 and the compression shaft 6 to move downward, thereby causing the partition plate 61 to compress the first cavity 111. Then, the first vertical surface 21 contacts the sliding part 3, the sliding part 3 remains in the second position and the abutting part 7 remains stationary.

[0036] The transmission process of the above structure is as follows: After the third inclined surface 22 separates from the first inclined surface 31, the first vertical surface 21 immediately contacts the side wall of the sliding member 3 and locks its position, so that the sliding member 3 is kept in the second position and mechanically limited. At this time, the second inclined surface 32 and the fourth inclined surface 71 remain in contact, ensuring that the contact member 7 and the compression shaft 6 are stably stopped at the downward limit position, and the pressure in the first cavity 111 is constant.

[0037] To improve the limiting effect, such as Figure 4 As shown, the sliding member 3 is provided with a third locking plane 35 parallel to the first vertical surface 21. When the sliding member 3 is in the second position, the first vertical surface 21 and the third locking plane 35 abut against each other. Through the coordinated abutment of the first vertical surface 21 and the third locking plane 35, compared with the limiting method of line contact or point contact, the contact area between the transmission member 2 and the sliding member 3 is increased, thereby improving the stability and load-bearing capacity of the mechanical limiting. Correspondingly, when the sliding member 3 is in the second position, its contact position with the abutting member 7 is also a surface contact.

[0038] In another embodiment, such as Figure 1 As shown, the abutment 7 is provided with a first locking plane 72, and the sliding member 3 is provided with a second locking plane 34. Both the first locking plane 72 and the second locking plane 34 are parallel to the sliding direction of the sliding member 3. The third inclined surface 22 first abuts against the first inclined surface 31. During the vertical movement of the transmission member 2, the second inclined surface 32 first abuts against the fourth inclined surface 71, driving the abutment 7 and the compression shaft 6 to move downward. Then, the second locking plane 34 abuts against the first locking plane 72, and the sliding member 3 moves laterally to the second position while the abutment 7 remains stationary.

[0039] The transmission process of the above structure is as follows: After the second locking plane 34 disengages from the first locking plane 72, the first vertical surface 21 contacts the side wall of the sliding member 3, restricting the sliding member 3 from retracting and keeping the sliding member 3 in the second position to achieve mechanical limiting. At this time, the second inclined surface 32 and the fourth inclined surface 71 remain in contact, ensuring that the contacting member 7 and the compression shaft 6 are stably stopped at the downward limit position, and the pressure in the first cavity 111 is constant.

[0040] like Figure 1As shown, the compression shaft 6 is threadedly connected to an upper clamping member 9 and a lower clamping member 10, which clamp the abutment member 7. By adjusting the connection position between the upper clamping member 9 and the lower clamping member 10 and the compression shaft 6, the fixed height of the abutment member 7 on the compression shaft 6 can be changed, thereby adjusting the extreme position of the downward movement of the compression shaft 6, and thus adjusting the pressure inside the first cavity 111 to adapt to deep-sea pressure simulation under different experimental requirements.

[0041] The push rod 5 and compression shaft 6 of the present invention can be arranged in various forms, as long as the above-described transmission process can be achieved. In this embodiment, such as... Figure 1 As shown, the push rod 5 and the compression shaft 6 are coaxially arranged, and the compression shaft 6 is sleeved on the outside of the push rod 5 to save volume and improve structural compactness, making the force transmission more concentrated and stable when the transmission component 2 is pressed down, and reducing the risk of off-center load. In another embodiment, the push rods 5 are arranged side by side at intervals on the upper part of the pressure-resistant shell 4.

[0042] To facilitate the repositioning of each structure, in this embodiment, as follows: Figure 1 As shown, the first end of the push rod 5 is provided with a clamping block 11 with a diameter larger than that of the push rod 5, so that the partition plate 61 can be lifted by the clamping block 11 when the push rod 5 moves upward. After the test is completed, each structure is reset. When the transmission component 2 moves upward, the first vertical surface 21 of its side wall first disengages from the third locking plane 35 of the sliding component 3, releasing the limiting constraint on the sliding component 3; the sliding component 3 resets to the first position under the action of the first elastic component 8, thereby releasing the abutment limitation on the abutment component 7. At the same time, the transmission component 2 synchronously drives the push rod 5 connected to it to move upward. The clamping block 11 at the end of the push rod 5 contacts and lifts the partition plate 61, thereby driving the compression shaft 6 and the abutment component 7 fixed on the compression shaft 6 to reset vertically upward in sync, and finally completing the reset of all components. The reset process is simple and convenient.

[0043] A sealing ring is provided between the push rod 5 and the compression shaft 6, and a sealing ring is provided between the partition plate 61 and the inner wall of the pressure-resistant cavity 110 to ensure the sealing performance of the pressure-resistant cavity 110 and maintain the stability of the hydraulic environment in the first cavity 111.

[0044] Furthermore, such as Figure 1 and Figure 2 As shown, two second elastic elements 17 are provided between the two sides of the opening on the fixed frame 1 and the transmission component 2. The second elastic elements 17 give the transmission component 2 a tendency to return to its original position. When the external force is removed, the second elastic elements 17 push the transmission component 2 to rise vertically along the fixed frame 1. When the pressure on the transmission component 2 is released, it automatically returns to its initial position under the action of the second elastic elements 17, thereby driving the various structures to reset and effectively improving the efficiency of equipment recycling.

[0045] like Figure 1As shown, in this embodiment, the second end of the push rod 5 is fixed to the middle of the transmission component 2; the compression shaft 6 is located at the central axis of the pressure-resistant shell 4, so that the pressing assembly has an approximately symmetrical structure. There are two sliding members 3, and the two sliding members 3 are symmetrically arranged on opposite sides of the abutment component 7 along the axis of the push rod 5. The first elastic member 8 connects the two sliding members 3 to keep the two sliding members 3 in the first position. The symmetrically arranged sliding members 3 move synchronously under the action of the first elastic member 8, improving the smoothness and reliability of the mechanism's operation.

[0046] Understandably, the connection method of the first elastic element 8 can be flexibly configured. Alternatively, the first elastic element 8 can be connected between the fixed frame 1 and the sliding element 3, and the fixed frame 1 can provide elastic reset support for the sliding element 3, thus achieving the function of maintaining the first position of the sliding element 3 in the non-working state.

[0047] To improve the sliding stability of the slider 3, in this embodiment, as follows: Figure 1 and Figure 2 As shown, the fixing frame 1 has two sliding grooves 120. One end of the sliding member 3 is connected to the sliding groove 120 and slides along the extension direction of the sliding groove 120. The extension direction of the sliding groove 120 is transverse. In another embodiment, the sliding groove 120 extends obliquely, and its extension direction has a component in the transverse direction. The setting of the sliding groove 120 provides a stable guide path for the sliding member 3, ensuring its smoothness and accuracy in transverse reciprocating motion.

[0048] Example 2: Reference Figure 5 As shown, the present invention provides a frame 1, a transmission component 2 vertically slidably connected to the frame 1, a pressure-resistant shell 4 having a pressure-resistant cavity 110, a push rod 5 vertically slidably connected to the pressure-resistant shell 4, and a compression shaft 6 horizontally slidably connected to the pressure-resistant shell 4. The first end of the compression shaft 6 passes through the pressure-resistant shell 4 into the pressure-resistant cavity 110. The first end of the compression shaft 6 is provided with a partition plate 61 that divides the pressure-resistant cavity 110 into a first cavity 111 and a second cavity 112. The first end of the push rod 5 passes through the pressure-resistant shell 4 into the first cavity 111, and the second end of the push rod 5 is connected to the transmission component. 2. Fixed connection. The second end of the compression shaft 6 is provided with a fifth inclined surface 33. The side wall of the transmission component 2 is provided with a vertically arranged inclined third inclined surface 22 and a first vertical surface 21 above the third inclined surface 22. The third inclined surface 22 and the fifth inclined surface 33 cooperate to transmit power. When the transmission component 2 presses down, it drives the third inclined surface 22 to abut against the fifth inclined surface 33, pushing the compression shaft 6 to slide laterally, thereby causing the partition plate 61 to compress the first cavity 111. During the vertical movement of the transmission component 2, when the first vertical surface 21 contacts the compression shaft 6, the position of the compression shaft 6 remains unchanged.

[0049] In this embodiment, the first cavity 111 and the second cavity 112 are laterally distributed. The bottom of the pressure-resistant shell 4 is an openable structure so that the test block 130 can be placed into the first cavity 111 or taken out of the first cavity 111. The upper part of the pressure-resistant shell 4 is provided with a channel for the push rod 5 to extend vertically, and the side is provided with a channel for the compression shaft 6 to extend laterally. During the sliding process of the compression shaft 6, the partition plate 61 at its end is always in close contact with the inner wall of the pressure-resistant shell 4 to ensure the separation and sealing of the first cavity 111 and the second cavity 112 and prevent the medium from flowing between the two cavities. The upper shell 41 is provided with a vent hole at the position corresponding to the second cavity 112 to communicate with the outside, so as to balance the air pressure in the second cavity 112; the first cavity 111 is provided with an openable liquid inlet and a liquid outlet, so that seawater can be introduced through the liquid inlet before the test and discharged through the liquid outlet after the test. During the test, both the liquid inlet and the liquid outlet are in a closed state to keep the first cavity 111 sealed.

[0050] In the aforementioned clamping assembly, when the transmission component 2 is pressed down, the third inclined surface 22 of the transmission component 2 abuts against the fifth inclined surface 33 at the second end of the compression shaft 6. Since the compression shaft 6 is designed for lateral sliding, the vertical pressure of the third inclined surface 22 is converted into lateral driving force, pushing the compression shaft 6 to slide laterally along the pressure-resistant shell 4. The partition plate 61 at the first end of the compression shaft 6 moves inward, compressing the liquid in the first cavity 111, thereby quickly simulating the hydraulic pressure of the deep-sea environment. When the transmission component 2 is pressed down to a certain height, the transmission component 2 forms a mechanical limit on the compression shaft 6, and the compression shaft 6 stops moving inward, maintaining hydraulic stability. The push rod 5 continues to press down with the transmission component 2, applying vertical mechanical stress to the test block 130. Thus, through a single pressing action of the transmission component 2, the simulation of the marine hydraulic environment and the application of mechanical stress to the test block 130 are realized simultaneously, making the operation process simple. When the transmission component 2 is pressed down to a certain height, the third inclined surface 22 disengages from the fifth inclined surface 33, and the first vertical surface 21 abuts against the fifth inclined surface 33 of the compression shaft 6. At this time, the lateral displacement of the compression shaft 6 is locked by the first vertical surface 21, preventing further sliding. Therefore, the position of the partition plate 61 is fixed, and the pressure inside the first cavity 111 remains constant. Thus, this application uses a mechanical limiting method to lock the pressure inside the first cavity 111, resulting in high stability and enabling long-term stable maintenance of the marine hydraulic environment. Compared to Embodiment 1, the structure of this embodiment is simpler; the simulation of the marine hydraulic environment can be achieved solely through the cooperation of the push rod 5 and the compression shaft 6.

[0051] Example 3 Reference Figure 6As shown, the present invention provides a compression creep test fixture, including a base 12, an upper pressure plate 13 that slides vertically on the base 12, a driving device 14 for driving the upper pressure plate 13 to move vertically, a transverse pressure block 15 that slides laterally on the base 12, and a connecting rod 16 connecting the transverse pressure block 15 and the upper pressure plate 13. The two ends of the connecting rod 16 are respectively hinged to the transverse pressure block 15 and the upper pressure plate 13. When the driving device 14 drives the upper pressure plate 13 to move downward, the connecting rod 16 pushes the transverse pressure block 15 to slide laterally on the base 12. It also includes the clamping assembly described in Embodiment 1 or Embodiment 2, with the fixing frame 1 and the pressure-resistant shell 4 fixed to the base 12, the transmission component 2 installed on the upper pressure plate 13, and one end of the transverse pressure block 15 extending into the first cavity 111.

[0052] In the aforementioned compression creep test fixture, when the upper pressure plate 13 moves downward, it synchronously drives the transverse pressure block 15 to apply lateral pressure to the test block 130. Simultaneously, the clamping assembly establishes and locks the hydraulic pressure within the first cavity 111, allowing the test block 130 to undergo compression creep testing under the combined action of vertical pressure, lateral pressure, and simulated deep-sea hydraulic pressure, realistically replicating the mechanical response process of materials in a deep-sea environment. The entire fixture achieves multi-dimensional stress loading through a single drive source, featuring a compact structure, precise control, and suitability for long-term stability testing.

[0053] The testing process of the compression creep test fixture is as follows: the test block 130 is placed into the first cavity 111 and positioned, the bottom structure of the pressure shell 4 is closed, then one end of the two transverse pressure blocks 15 is inserted into the first cavity 111, and a preset amount of simulated seawater is introduced into the first cavity 111 through the liquid inlet. After the liquid injection is completed, the liquid inlet is closed, so that the first cavity 111 is in a sealed state. The drive device 14 is activated, which drives the upper pressure plate 13 to slide vertically downward along the base 12, simultaneously driving the transmission component 2 installed at its bottom to move downward. The upper pressure plate 13 pushes the transverse pressure block 15 to slide laterally along the base 12 through the hinged connecting rod 16, so that one end of the transverse pressure block 15 abuts against the test block 130. At the same time, under the continuous downward pressure of the transmission component 2, its side wall inclined surface drives the compression shaft 6 to move. The partition plate 61 at the end of the compression shaft 6 synchronously compresses the first cavity 111, so that the simulated seawater in the cavity forms a stable hydraulic pressure. The first end of the push rod 5 moves downward synchronously with the transmission component 2, which helps to maintain the hydraulic pressure of the cavity and can abut against the test block 130 to apply axial load. When the transmission component 2 moves down to the first vertical surface 21 and contacts the sliding component 3 or the compression shaft 6, the position of the compression shaft 6 is locked, the hydraulic pressure of the first cavity 111 remains constant, and the test block 130 enters the multi-stress coupling compression creep test stage.

[0054] Unless otherwise specified, the raw materials and equipment used in this invention are all commonly used in the field; unless otherwise specified, the methods used in this invention are all conventional methods in the field.

[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A clamping assembly for a compression creep test fixture, characterized in that, The device includes a fixed frame (1), a transmission component (2) vertically slidably connected to the fixed frame (1), a sliding component (3) connected to the fixed frame (1), a pressure-resistant shell (4) having a pressure-resistant cavity (110), a push rod (5) vertically slidably connected to the pressure-resistant shell (4), and a compression shaft (6), as well as an abutment component (7) fixed to the compression shaft (6). The first end of the compression shaft (6) passes through the pressure-resistant shell (4) into the pressure-resistant cavity (110). The first end of the compression shaft (6) is provided with a partition plate (61) that divides the pressure-resistant cavity (110) into a first cavity (111) and a second cavity (112). The first end of the push rod (5) passes through the pressure-resistant shell (4) into the first cavity. (111) Inside, the second end of the push rod (5) is connected to the transmission member (2), the sliding member (3) is provided with a first inclined surface (31) and a second inclined surface (32), the side wall of the transmission member (2) is provided with an inclined third inclined surface (22), the abutting member (7) is provided with a fourth inclined surface (71), the third inclined surface (22) cooperates with the first inclined surface (31) for transmission, the second inclined surface (32) cooperates with the fourth inclined surface (71) for transmission, the sliding member (3) has a first position and a second position, the sliding member (3) is provided with a first elastic member (8) to keep it in the first position, when the transmission member (2) presses down, it pushes the sliding member (3) to move from the first position to the second position; The transmission component (2) has a first vertical surface (21) located above the third inclined surface (22) on its side wall. During the vertical movement of the transmission component (2), the third inclined surface (22) first abuts against the first inclined surface (31), and then the second inclined surface (32) cooperates with the fourth inclined surface (71), driving the abutting component (7) and the compression shaft (6) to move downward. Then, the transmission component (2) switches to the first vertical surface (21) to contact the sliding component (3). The sliding component (3) remains in the second position and the abutting component (7) remains stationary. Alternatively, the abutment (7) is provided with a first locking plane (72), and the sliding member (3) is provided with a second locking plane (34). The first locking plane (72) and the second locking plane (34) are both parallel to the sliding direction of the sliding member (3). The third inclined surface (22) first abuts against the first inclined surface (31). During the vertical movement of the transmission member (2), the second inclined surface (32) first abuts against the fourth inclined surface (71), driving the abutment (7) and the compression shaft (6) to move downward. Then, the second locking plane (34) abuts against the first locking plane (72), and the sliding member (3) moves laterally to the second position while the abutment (7) remains stationary.

2. The clamping assembly for a compression creep test fixture according to claim 1, characterized in that, The sliding member (3) is provided with a third locking plane (35) parallel to the first vertical surface (21). When the sliding member (3) is in the second position, the first vertical surface (21) and the third locking plane (35) abut against each other.

3. The clamping assembly for a compression creep test fixture according to claim 1, characterized in that, The compression shaft (6) is threadedly connected to an upper clamping member (9) and a lower clamping member (10), which clamp the abutment member (7).

4. The clamping assembly for a compression creep test fixture according to claim 1, characterized in that, The push rod (5) and the compression shaft (6) are coaxially arranged, and the compression shaft (6) is sleeved on the outside of the push rod (5).

5. A clamping assembly for a compression creep test fixture according to claim 3, characterized in that, The first end of the push rod (5) is provided with a clamping block (11) with a diameter larger than that of the push rod (5) so that the partition plate (61) can be lifted by the clamping block (11) when the push rod (5) moves upward.

6. A clamping assembly for a compression creep test fixture according to claim 1, characterized in that, The fixed frame (1) is provided with a slide groove (120), one end of the sliding member (3) is connected to the slide groove (120) and slides along the extension direction of the slide groove (120); the extension direction of the slide groove (120) is transverse; or, the slide groove (120) extends obliquely, and its extension direction has a component in the transverse direction.

7. A clamping assembly for a compression creep test fixture according to claim 1, characterized in that, The number of the sliding members (3) is two, and the two sliding members (3) are arranged on opposite sides of the abutment member (7). The first elastic member (8) is connected between the two sliding members (3) so that the two sliding members (3) are kept in the first position.

8. A clamping assembly for a compression creep test fixture according to claim 1, characterized in that, A second elastic element (17) is provided between the fixed frame (1) and the transmission element (2). The second elastic element (17) makes the transmission element (2) tend to return to its original position. When the external force is removed, the second elastic element (17) pushes the transmission element (2) to rise vertically along the fixed frame (1).

9. A clamping assembly for a compression creep test fixture, characterized in that, The device includes a fixed frame (1), a transmission component (2) vertically slidably connected to the fixed frame (1), a pressure-resistant shell (4) having a pressure-resistant cavity (110), a push rod (5) vertically slidably connected to the pressure-resistant shell (4), and a compression shaft (6) horizontally slidably connected to the pressure-resistant shell (4). The first end of the compression shaft (6) passes through the pressure-resistant shell (4) into the pressure-resistant cavity (110). The first end of the compression shaft (6) is provided with a partition plate (61) that divides the pressure-resistant cavity (110) into a first cavity (111) and a second cavity (112). The first end of the push rod (5) passes through the pressure-resistant shell (4) into the first cavity (111). The second end of the push rod (5) is connected to the transmission component (2). 2) Connection, the second end of the compression shaft (6) is provided with a fifth inclined surface (33), the side wall of the transmission component (2) is provided with a vertically arranged inclined third inclined surface (22) and a first vertical surface (21) above the third inclined surface (22). The third inclined surface (22) and the fifth inclined surface (33) cooperate to transmit power. When the transmission component (2) presses down, it drives the third inclined surface (22) to abut against the fifth inclined surface (33), pushing the compression shaft (6) to slide laterally, so that the partition plate (61) compresses the first cavity (111). During the vertical movement of the transmission component (2), when the first vertical surface (21) contacts the compression shaft (6), the position of the compression shaft (6) remains unchanged.

10. A compression creep testing fixture, characterized in that, The device includes a base (12), an upper pressure plate (13) that slides vertically on the base (12), a drive device (14) for driving the upper pressure plate (13) to move vertically, a horizontal pressure block (15) that slides laterally on the base (12), and a connecting rod (16) connecting the horizontal pressure block (15) and the upper pressure plate (13). The two ends of the connecting rod (16) are hinged to the horizontal pressure block (15) and the upper pressure plate (13) respectively. When the drive device (14) drives the upper pressure plate (13) to move downward, the connecting rod (16) pushes the horizontal pressure block (15) to slide laterally on the base (12). It also includes the clamping assembly as described in claim 1 or 9, wherein the fixing frame (1) and the pressure-resistant shell (4) are mounted on the base (12), the transmission component (2) is mounted on the upper pressure plate (13), and one end of the transverse pressure block (15) extends into the first cavity (111).

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