Clamp for compression creep test and compression assembly thereof

Abstract

The invention relates to the technical field of creep tests, and discloses a compression creep test clamp and a compression assembly thereof, and the compression assembly comprises a fixed frame, a transmission part vertically connected to the fixed frame in a sliding manner, a sliding part connected to the fixed frame, a pressure-resistant shell with a first cavity, a push rod vertically connected to the pressure-resistant shell in a sliding manner, and a compression shaft, the first end of the compression shaft penetrates through the pressure-resistant shell into the pressure-resistant cavity, one end of the push rod extends into the first cavity, the other end of the push rod is connected with the transmission part, the sliding part is provided with a first inclined face and a second inclined face, and the side wall of the transmission part is provided with a third inclined face matched with the first inclined face. The abutting piece is provided with a fourth inclined face matched with the second inclined face. When the transmission piece is pressed downwards, the sliding piece is pushed to move from the first position to the second position. According to the pressing assembly, ocean hydraulic environment simulation and test block mechanical stress application can be synchronously achieved only through single operation, and meanwhile long-acting and stable maintenance of the ocean hydraulic environment can be achieved through a mechanical limiting mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of creep test, in particular to a compression creep test clamp and a compression assembly thereof. BACKGROUND

[0002] In recent years, titanium alloy has been widely used in deep sea exploration. However, during the long-term use of deep submersible vehicles, offshore platforms and other equipment, titanium alloy materials will be subjected to complex stress states, especially at different depths and environments, the stress on the material is not limited to single tensile force, often accompanied by compression stress and torsional stress, which is prone to titanium alloy creep. Titanium alloy creep refers to the phenomenon that the plastic deformation of the material increases with time under a constant stress below the yield strength.

[0003] In order to test the long-term stability and reliability of titanium alloy under actual working conditions, a creep test clamp needs to be developed to simulate the creep behavior of titanium alloy under complex stress environment in the ocean. For example, the Chinese patent with publication number CN119901574A discloses a biaxial single-axis shared creep test clamp, which can convert single tensile stress into biaxial compression stress to simulate the creep behavior of titanium alloy under complex stress environment in the ocean.

[0004] However, the test process of the above-mentioned creep test clamp needs to be operated in stages and steps, first driving the lower box to simulate the marine hydraulic environment, then driving the longitudinal rod and the transverse pressing block to apply mechanical stress to the test block, which is complex to operate. Moreover, the clamp relies on the magnetic suction disc on the damping block to adsorb the fixed block of the push rod to maintain the hydraulic stability in the pressure-resistant cabin, which has poor stability and is difficult to maintain the ideal adsorption state for a long time in actual operation. SUMMARY

[0005] In order to solve the above technical problems, the present application provides a compression assembly for a compression creep test clamp, which can simultaneously realize marine hydraulic environment simulation and test block mechanical stress application through only a single operation, and the operation process is simple. At the same time, relying on mechanical limiting mode, it can realize long-term stable maintenance of marine hydraulic environment.

[0006] The technical scheme of the present application is: a compression assembly for a compression creep test clamp, comprising a fixing frame, a transmission member vertically slidingly connected to the fixing frame, a sliding member connected to the fixing frame, a pressure-resistant shell with a pressure-resistant cavity, a push rod and a compression shaft vertically slidingly connected to the pressure-resistant shell, and an abutting member fixed to the compression shaft, the first end of the compression shaft penetrating through the pressure-resistant shell into the pressure-resistant cavity, the first end of the compression shaft being provided with a partition plate dividing the pressure-resistant cavity into a first cavity and a second cavity, the first end of the push rod penetrating through the pressure-resistant shell into the first cavity, the second end of the push rod being connected to the transmission member, the sliding member being provided with a first inclined surface and a second inclined surface, the side wall of the transmission member being provided with a third inclined surface arranged obliquely, the abutting member being provided with a fourth inclined surface, the third inclined surface cooperating with the first inclined surface for transmission, the second inclined surface cooperating with the fourth inclined surface for transmission, the sliding member having a first position and a second position, the sliding member being provided with a first elastic member for keeping the sliding member at the first position, the transmission member being depressed to push the sliding member to move from the first position to the second position. The side wall of the transmission member is provided with a first vertical surface above the third inclined surface, during vertical movement of the transmission member, the third inclined surface first abuts against the first inclined surface, and then the second inclined surface cooperates with the fourth inclined surface to drive the abutting member and the compression shaft to move downward, and then the first vertical surface contacts the sliding member, the sliding member is kept at the second position and the abutting member remains stationary. Alternatively, the abutting member is provided with a first locking plane, the sliding member is provided with a second locking plane, the first locking plane and the second locking plane are parallel to the sliding direction of the sliding member, during vertical movement of the transmission member, the second inclined surface first abuts against the fourth inclined surface to drive the abutting member and the compression shaft to move downward, and then the second locking plane abuts against the first locking plane, the sliding member moves transversely to the second position and the abutting member remains stationary.

[0007] In the compression assembly, when the transmission member is pressed down, it will first drive the push rod connected thereto to move downward synchronously, the first end of the push rod extends into the first cavity of the pressure-resistant shell, and at the same time, during the downward pressing of the transmission member, the third inclined surface of the side wall of the transmission member will first abut against the first inclined surface of the sliding member, pushing the sliding member to move from the first position to the second position against the force of the first elastic member, after the sliding member moves, the second inclined surface of the sliding member will cooperate with the fourth inclined surface of the abutting member to drive the push rod and the compression shaft to move downward, and the partition plate of the compression shaft moves downward to compress the liquid in the first cavity, thereby quickly simulating the hydraulic pressure of the deep sea environment, when the transmission member is pressed down to a certain height, the transmission member, the abutting member and the sliding member can form mechanical limiting, the compression shaft stops moving downward, the hydraulic pressure is kept stable, and the push rod continues to press down with the transmission member to apply vertical mechanical stress to the test block. Thus, through a single pressing action of the transmission member, the simulation of the marine hydraulic environment and the application of mechanical stress to the test block are simultaneously realized, and the operation process is simple. In the first scheme, after the third inclined surface is separated from the first inclined surface, the first vertical surface immediately contacts and locks the position of the side wall of the sliding member, so that the sliding member is kept at the second position, mechanical limiting is realized, at this time, the second inclined surface and the fourth inclined surface keep abutting state, so as to ensure that the abutting member and the compression shaft are stably kept at the lower limit position, and the pressure in the first cavity is constant; in the second scheme, after the second locking plane is separated from the first locking plane, the first vertical surface contacts the side wall of the sliding member to limit the sliding member from returning, so that the sliding member is kept at the second position, mechanical limiting is realized, at this time, the second inclined surface and the fourth inclined surface keep abutting state, so as to ensure that the abutting member and the compression shaft are stably kept at the lower limit position, and the pressure in the first cavity is constant. Thus, the application adopts mechanical limiting to lock the pressure in the first cavity, has high stability, and can realize long-term stable maintenance of the marine hydraulic environment.

[0008] Optionally, the sliding member is provided with a third locking plane parallel to the first vertical plane, and the first vertical plane abuts against the third locking plane when the sliding member is at the second position.

[0009] In the technical scheme, through the cooperative abutment of the first vertical plane and the third locking plane, compared with the limiting mode of line contact or point contact, the contact area of the transmission member and the sliding member is increased, and the stability and carrying capacity of mechanical limiting are improved.

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

[0011] In the technical scheme, by adjusting the connection positions of the upper clamping member and the lower clamping member with the compression shaft, the fixed height of the abutting member on the compression shaft can be changed, so that the limit position of the compression shaft moving downward is adjusted, and then the pressure in the first cavity is adjusted to adapt to the 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 arranged outside the push rod.

[0013] In the technical scheme, the volume is saved, the compactness is improved, the force transmission is more concentrated and stable when the transmission member is pressed down, and the risk of eccentric load is reduced.

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

[0015] In the technical scheme, after the test is completed, each structure is reset, when the transmission member moves up, the first vertical surface of the side wall is first separated from the third locking plane of the sliding member, and the limiting constraint of the sliding member is released; the sliding member is reset to the first position under the action of the first elastic member, thereby releasing the abutting limiting of the abutting member, and at the same time, the transmission member synchronously drives the push rod connected thereto to move upward, the compression block at the end of the push rod contacts and lifts the partition plate, thereby driving the abutting member fixed on the compression shaft to be reset vertically upward, and finally completing the reset of all components. The reset process is simple and convenient.

[0016] Optionally, the fixed frame is provided with a sliding groove, one end of the sliding member is connected with 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 the extension direction has a component in the transverse direction.

[0017] In the technical scheme, the sliding groove provides a stable guide path for the sliding member, ensuring the stability and precision of the sliding member in transverse reciprocating motion.

[0018] Optionally, the number of the sliding members is two, the two sliding members are arranged on opposite sides of the abutting member, and the first elastic member is connected between the two sliding members to keep the two sliding members in the first position.

[0019] In the technical scheme, the two sliding members arranged symmetrically on both sides act synchronously under the action of the first elastic member, improving the stability and reliability of the mechanism.

[0020] Optionally, a second elastic member is arranged between the fixed frame and the transmission member, the second elastic member makes the transmission member have a tendency to reset upward, and when the external force is removed, the second elastic member pushes the transmission member to vertically rise along the fixed frame.

[0021] In the technical scheme, when the pressure on the transmission member is removed, the transmission member automatically returns to the initial position under the action of the second elastic member, thereby driving each structure to reset, and effectively improving the cycle use efficiency of the equipment.

[0022] The second specific technical solution of the present application is a compression assembly for a compression creep test clamp, comprising a fixed frame, a transmission member vertically and slidingly connected to the fixed frame, a pressure-resistant shell having a pressure-resistant cavity, a push rod vertically and slidingly connected to the pressure-resistant shell, and a compression shaft transversely and slidingly connected to the pressure-resistant shell, the first end of the compression shaft penetrating through the pressure-resistant shell into the pressure-resistant cavity, the first end of the compression shaft being provided with a partition plate dividing the pressure-resistant cavity into a first cavity and a second cavity, the first end of the push rod penetrating through the pressure-resistant shell into the first cavity, the second end of the push rod being connected to the transmission member, the second end of the compression shaft being provided with a fifth inclined surface, the side wall of the transmission member being provided with a third inclined surface vertically arranged and a first vertical surface arranged above the third inclined surface, the third inclined surface being matched with the fifth inclined surface for transmission, the transmission member being lowered to drive the third inclined surface to abut against the fifth inclined surface to push the compression shaft to transversely slide, and the first vertical surface being in contact with the compression shaft during vertical movement of the transmission member, so that the position of the compression shaft remains unchanged.

[0023] In the compression assembly, when the transmission member is lowered, the third inclined surface of the transmission member abuts against the fifth inclined surface of the second end of the compression shaft, the vertical pressure of the third inclined surface is converted into a transverse driving force to push the compression shaft to transversely slide along the pressure-resistant shell, the partition plate at the first end of the compression shaft moves inward to compress the liquid in the first cavity, so as to quickly simulate the hydraulic pressure of a deep sea environment, when the transmission member is lowered to a certain height, the transmission member mechanically limits the compression shaft, the compression shaft stops moving inward to keep the hydraulic pressure stable, and the push rod continues to be lowered with the transmission member to apply a vertical mechanical stress to the test block. Thus, through a single lowering action of the transmission member, the simulation of the marine hydraulic environment and the application of the mechanical stress to the test block are simultaneously achieved, and the operation process is simple. When the transmission member is lowered to a certain height, the third inclined surface is disengaged from the fifth inclined surface, the first vertical surface abuts against the fifth inclined surface of the compression shaft, the transverse displacement of the compression shaft is locked by the first vertical surface and cannot slide any more, and the position of the partition plate is thus fixed, so that the pressure in the first cavity is constant. Thus, the pressure in the first cavity is locked by the mechanical limiting mode, the stability is high, and the long-term stable maintenance of the marine hydraulic environment can be achieved.

[0024] The third specific technical solution of the present application is a compression creep test clamp, comprising a base, an upper pressing plate vertically and slidingly arranged on the base, a driving device for driving the upper pressing plate to vertically move, a transverse pressing block transversely and slidingly connected to the base, and a connecting rod connected between the transverse pressing block and the upper pressing plate, the two ends of the connecting rod being hingedly connected to the transverse pressing block and the upper pressing plate, respectively, and the driving device driving the upper pressing plate to move downward to push the transverse pressing block to transversely slide on the base. The compression assembly described above is further included, the fixed frame and the pressure-resistant shell are mounted on the base, the transmission member is mounted on the upper pressing plate, and one end of the transverse pressing block extends into the first cavity.

[0025] In the compression creep test fixture, when the upper pressing plate moves downward, the lateral pressing force is synchronously applied to the test block by the lateral pressing block, and the establishment and locking of the hydraulic pressure in the first cavity are realized by the pressing assembly, so that the test block is subjected to the compression creep test under the combined action of the vertical pressure, the lateral pressure and the simulated deep sea hydraulic pressure, and the mechanical response process of the material in the deep sea environment is truly restored. The entire fixture realizes multi-dimensional stress loading through a single driving source, has compact structure, accurate control and is suitable for long-term stable test.

[0026] Compared with the prior art, the present application has at least the following advantages: (1) The pressing assembly can simultaneously realize the simulation of the marine hydraulic environment and the mechanical stress application to the test block through single operation, and the operation process is simple; and the marine hydraulic environment can be long-effectively and stably maintained by relying on the mechanical limiting mode. (2) The compression creep test fixture realizes multi-dimensional stress loading through a single driving source, has compact structure, accurate control and is suitable for long-term stable test. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the first sectional view of the pressing assembly of the present application; Figure 2 is the first structural schematic view of the pressing assembly of the present application; Figure 3 is the first structural schematic view of the pressing assembly of the present application; Figure 4 is the schematic view of a transmission structure in the first structure of the pressing assembly of the present application; Figure 5 is the second structural schematic view of the pressing assembly of the present application; Figure 6 is the structural schematic view of the compression creep test fixture of the present application.

[0028] In the figure: 1, fixed frame; 2, transmission part; 3, sliding part; 4, pressure-resistant shell; 5, push rod; 6, compression shaft; 7, abutting part; 8, first elastic part; 9, upper clamping part; 10, lower clamping part; 11, pressing block; 12, base; 13, upper pressing plate; 14, driving device; 15, lateral pressing block; 16, connecting rod; 17, second elastic part; 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, sliding groove; 130, test block. DETAILED DESCRIPTION

[0029] The application will be described in the following with specific examples. It should be understood that these examples are only used to illustrate the application but not to limit the scope of the application, and any changes and advantages that can be thought of by those skilled in the art without departing from the spirit and scope of the application are included in the application, and the appended claims and any equivalents thereof are the protection scope of the application.

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

[0031] In the following examples, in order to facilitate understanding, the orientation of each structure of the compression creep test clamp and the compression assembly in the examples is described based on the normal assembly and the test working state, the vertical direction is along the direction of the fixed frame height extension and the sliding direction of the transmission member, the moving direction of the upper pressing plate close to the base is the vertical downward direction, and vice versa; the sliding direction of the lateral pressing block on the base and the sliding direction of the sliding member in the fixed frame sliding groove are taken as the reference, that is, the horizontal extension direction perpendicular to the vertical direction is the lateral direction, and the moving direction of the lateral pressing block into the first cavity is the lateral inward direction, and vice versa.

[0032] Example 1: Referring to Figure 1 to Figure 4 , the application provides a compression assembly for a compression creep test clamp, which comprises a fixed frame 1, a transmission member 2 vertically slidingly connected to the fixed frame 1, a sliding member 3 laterally slidingly connected to the fixed frame 1, a pressure-resistant shell 4 having a pressure-resistant cavity 110, a push rod 5 vertically slidingly connected to the pressure-resistant shell 4 and a compression shaft 6, and an abutting member 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 dividing 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 fixedly connected with 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 a third inclined surface 22 arranged obliquely, 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 away from the push rod 5 and a second position close to the push rod 5, the sliding member 3 is provided with a first elastic member 8 keeping it at the first position, and the transmission member 2 pushes the sliding member 3 to move from the first position to the second position when it is pressed down.

[0033] The pressure-resistant shell 4 is fixedly connected with the fixing frame 1, the fixing frame 1 is in a semi-enclosing structure to the pressure-resistant shell 4, the pressure-resistant shell 4 comprises an upper shell 41 and a lower shell 42 threadedly connected with 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, a through hole is arranged on the side wall of the upper shell 41 for the lateral pressing block 15 to extend into the first cavity 111 to extrude the test block 130, in the embodiment, one through hole is arranged on each of the opposite sides of the shell, so that the test block 130 can bear the synchronous extrusion force of the bilateral lateral pressing blocks 15, and the balance of the lateral stress of the test block 130 is ensured, and the fixing frame 1 is provided with openings corresponding to the through holes on the opposite sides close to the through holes; the upper shell 41 is provided with a ventilation hole corresponding to the second cavity 112 and communicating with the outside, so as to balance the air pressure in the second cavity 112, when the compression shaft 6 drives the partition plate 61 to move downward to compress the first cavity 111, the volume of the second cavity 112 will be increased synchronously, the ventilation hole can make the outside air smoothly enter the second cavity 112, so as to avoid the formation of negative pressure in the second cavity 112 to hinder the normal movement of the partition plate 61; similarly, when the partition plate 61 moves upward to reset, the air in the second cavity 112 can be discharged through the ventilation hole, so as to ensure the smooth bidirectional movement of the partition plate 61; the first cavity 111 is provided with an openable and closable liquid inlet and a liquid outlet, so as to pass seawater into the liquid inlet before testing, and discharge the seawater from the liquid outlet after testing, and the liquid inlet and the liquid outlet are in a closed state during the testing process, so that the first cavity 111 remains sealed.

[0034] In the above compression assembly, when the transmission member 2 is pressed downward, the push rod 5 connected with the transmission member 2 will be driven to move downward 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 downward pressing process of the transmission member 2, the third inclined surface 22 of the side wall of the transmission member 2 will first abut against the first inclined surface 31 of the sliding member 3, and the sliding member 3 is driven to move from the first position to the second position against the force of the first elastic member 8, after the movement of the sliding member 3, the second inclined surface 32 of the sliding member 3 will cooperate with the fourth inclined surface 71 of the abutting member 7 to drive the push rod 5 and the compression shaft 6 to move downward, the partition plate 61 of the compression shaft 6 moves downward to compress the liquid in the first cavity 111, so as to quickly simulate the hydraulic pressure of the deep sea environment, when the transmission member 2 is pressed to a certain height, the transmission member 2, the abutting member 7 and the sliding member 3 can form mechanical limiting, the compression shaft 6 stops moving downward, the hydraulic pressure is kept stable, and the push rod 5 continues to press downward with the transmission member 2 to apply vertical mechanical stress to the test block 130. Therefore, through the single pressing action of the transmission member 2, the simulation of the marine hydraulic environment and the application of mechanical stress to the test block 130 are realized synchronously, the operation process is simple, the pressure in the first cavity 111 is locked by using the mechanical limiting mode, the stability is high, and the long-term stable maintenance of the marine hydraulic environment can be realized.

[0035] In the embodiment, as shown in Figure 4As shown, the side wall of the transmission member 2 is provided with a first vertical surface 21 above the third inclined surface 22, the first vertical surface 21 is parallel to the moving direction of the transmission member 2, during the vertical movement of the transmission member 2, the third inclined surface 22 first abuts with the first inclined surface 31, and then the second inclined surface 32 abuts with the fourth inclined surface 71, driving the abutting member 7 and the compression shaft 6 to move downward, so that the partition plate 61 compresses the first cavity 111, and then the first vertical surface 21 contacts with the sliding member 3, the sliding member 3 remains in the second position and the abutting member 7 remains stationary.

[0036] The transmission process of the above structure is that after the third inclined surface 22 is separated from the first inclined surface 31, the first vertical surface 21 immediately contacts with the side wall of the sliding member 3 and locks the position of the sliding member 3, so that the sliding member 3 remains in the second position and realizes mechanical limiting, at this time, the second inclined surface 32 abuts with the fourth inclined surface 71, ensuring that the abutting member 7 and the compression shaft 6 stably stay at the lower limit position, and the pressure in the first cavity 111 is constant.

[0037] In order to improve the limiting effect, as shown in the first embodiment, Figure 4 As shown, the sliding member 3 is provided with a third locking surface 35 parallel to the first vertical surface 21, when the sliding member 3 is in the second position, the first vertical surface 21 abuts with the third locking surface 35. Through the cooperative abutment of the first vertical surface 21 and the third locking surface 35, compared with the linear contact or point contact limiting mode, the contact area between the transmission member 2 and the sliding member 3 is increased, and the stability and carrying capacity of mechanical limiting are improved. Correspondingly, when the sliding member 3 is in the second position, the contact position between the sliding member 3 and the abutting member 7 is also a surface contact.

[0038] In another embodiment, as shown in the second embodiment, Figure 1 As shown, the abutting member 7 is provided with a first locking surface 72, and the sliding member 3 is provided with a second locking surface 34, the first locking surface 72 and the second locking surface 34 are parallel to the sliding direction of the sliding member 3, the third inclined surface 22 first abuts with the first inclined surface 31, during the vertical movement of the transmission member 2, the second inclined surface 32 first abuts with the fourth inclined surface 71, driving the abutting member 7 and the compression shaft 6 to move downward, and then the second locking surface 34 abuts with the first locking surface 72, the sliding member 3 moves transversely to the second position and the abutting member 7 remains stationary.

[0039] The transmission process of the above structure is that after the second locking surface 34 is separated from the first locking surface 72, the first vertical surface 21 contacts with the side wall of the sliding member 3, limiting the sliding member 3 from returning, so that the sliding member 3 remains in the second position and realizes mechanical limiting, at this time, the second inclined surface 32 abuts with the fourth inclined surface 71, ensuring that the abutting member 7 and the compression shaft 6 stably stay at the lower limit position, and the pressure in the first cavity 111 is constant.

[0040] As shown in the first embodiment, 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 the embodiment, the second end of the push rod 5 is fixed to the middle part of the transmission member 2; the compression shaft 6 is arranged at the central axis of the pressure-resistant shell 4, so that the compression assembly has an approximately symmetrical structure. The number of the sliding members 3 is two, and the two sliding members 3 are arranged on the opposite sides of the abutting member 7 along the axis of the push rod 5; 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. The two sliding members 3 arranged bilaterally symmetrically act synchronously under the action of the first elastic member 8, so that the lifting mechanism has stable operation and reliability.

[0046] As can be understood, the connection mode of the first elastic member 8 can be flexibly configured, and the first elastic member 8 can also be connected between the fixed frame 1 and the sliding member 3, so that the fixed frame 1 provides elastic reset support for the sliding member 3, and the function of keeping the sliding member 3 in the first position in the non-working state can also be realized.

[0047] In order to improve the sliding stability of the sliding member 3, in the embodiment, as shown in Figure 1 and Figure 2 , the fixed frame 1 is provided with two sliding grooves 120, one end of the sliding member 3 is connected with 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; and in another embodiment, the sliding groove 120 extends obliquely, and the extension direction has a component in the transverse direction. The sliding groove 120 provides a stable guide path for the sliding member 3, and ensures the stability and precision of the sliding member 3 in the transverse reciprocating motion.

[0048] Embodiment 2: As shown in Figure 5 , the present application provides a fixed frame 1, a transmission member 2 vertically and slidably connected to the fixed frame 1, a pressure-resistant shell 4 having a pressure-resistant cavity 110, a push rod 5 vertically and slidably connected to the pressure-resistant shell 4, and a compression shaft 6 transversely and slidably connected to the pressure-resistant shell 4. The first end of the compression shaft 6 penetrates the pressure-resistant shell 4 into the pressure-resistant cavity 110, and the first end of the compression shaft 6 is provided with a partition plate 61 dividing the pressure-resistant cavity 110 into a first cavity 111 and a second cavity 112. The first end of the push rod 5 penetrates the pressure-resistant shell 4 into the first cavity 111, the second end of the push rod 5 is fixedly connected with the transmission member 2, the second end of the compression shaft 6 is provided with a fifth inclined surface 33, the side wall of the transmission member 2 is provided with a third inclined surface 22 arranged vertically and obliquely and a first vertical surface 21 arranged above the third inclined surface 22, the third inclined surface 22 cooperates with the fifth inclined surface 33 to drive, and the transmission member 2 drives the third inclined surface 22 to abut against the fifth inclined surface 33 when it is pressed down, so as to push the compression shaft 6 to slide transversely, thereby compressing the first cavity 111 by the partition plate 61. During the vertical movement of the transmission member 2, the first vertical surface 21 contacts the compression shaft 6, and the position of the compression shaft 6 remains unchanged.

[0049] In this embodiment, the first cavity 111 and the second cavity 112 are distributed transversely, the bottom of the pressure-resistant shell 4 is a structure that can be opened and closed, so as to put the test block 130 into the first cavity 111 or take the test block 130 out of the first cavity 111; the upper part of the pressure-resistant shell 4 is provided with a passage for the push rod 5 to vertically extend into, and the side edge is provided with a passage for the compression shaft 6 to transversely extend into, and during the sliding process of the compression shaft 6, the partition plate 61 at the end of the compression shaft 6 is always in close abutment with the inner wall of the pressure-resistant shell 4, so as 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 body 41 is provided with a vent hole corresponding to the second cavity 112, which is in communication with the outside, so as to balance the air pressure in the second cavity 112; the first cavity 111 is provided with an openable and closable liquid inlet and a liquid outlet, so as to pass seawater into the liquid inlet before testing, and discharge seawater from the liquid outlet after testing, and the liquid inlet and the liquid outlet are both in a closed state during testing, so that the first cavity 111 remains sealed.

[0050] In the compression assembly, when the transmission member 2 is pressed downward, the third inclined surface 22 of the transmission member 2 is in abutment and cooperation with the fifth inclined surface 33 of the second end of the compression shaft 6. Since the compression shaft 6 is designed to slide transversely, the vertical pressure of the third inclined surface 22 will be converted into a transverse driving force, which pushes the compression shaft 6 to slide transversely along the pressure-resistant shell 4, and the partition plate 61 at the first end of the compression shaft 6 moves inward, compressing the liquid in the first cavity 111, so as to quickly simulate the hydraulic pressure of the deep sea environment. When the transmission member 2 is pressed downward to a certain height, the transmission member 2 forms mechanical limiting for the compression shaft 6, and the compression shaft 6 stops moving inward, so as to keep the hydraulic pressure stable, and the push rod 5 continues to be pressed downward with the transmission member 2, so as to apply vertical mechanical stress to the test block 130. Thus, through a single pressing action of the transmission member 2, the simulation of the marine hydraulic environment and the application of mechanical stress to the test block 130 are simultaneously realized, and the operation process is simple. When the transmission member 2 is pressed downward to a certain height, the third inclined surface 22 is disengaged 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 transverse displacement of the compression shaft 6 is locked by the first vertical surface 21, and cannot slide any more. The position of the partition plate 61 is thus fixed, and the pressure in the first cavity 111 is constant. Thus, the pressure in the first cavity 111 is locked by the mechanical limiting mode in this application, which has high stability and can realize long-term and stable maintenance of the marine hydraulic environment. Compared with embodiment 1, the structure of this embodiment is simpler, and the simulation of the marine hydraulic environment can be realized only by the cooperation of the push rod 5 and the compression shaft 6.

[0051] Embodiment 3 With reference to Figure 6As shown, the present application provides a compression creep test fixture, which comprises a base 12, an upper pressing plate 13 vertically sliding on the base 12, a driving device 14 for driving the vertical movement of the upper pressing plate 13, a lateral pressing block 15 laterally slidingly connected to the base 12, and a connecting rod 16 connected between the lateral pressing block 15 and the upper pressing plate 13, both ends of the connecting rod 16 being hinged to the lateral pressing block 15 and the upper pressing plate 13 respectively, when the driving device 14 drives the downward movement of the upper pressing plate 13, the lateral pressing block 15 is pushed to slide laterally on the base 12 through the connecting rod 16; Further comprising the compression assembly described in Embodiment 1 or Embodiment 2, the fixing frame 1 and the pressure-resistant shell 4 are fixed to the base 12, the transmission member 2 is installed on the upper pressing plate 13, and one end of the lateral pressing block 15 extends into the first cavity 111.

[0052] In the compression creep test fixture described above, when the upper pressing plate 13 moves downward, the lateral pressing block 15 is synchronously driven to exert lateral pressure on the test block 130, and at the same time, the establishment and locking of the hydraulic pressure in the first cavity 111 are realized through the compression assembly, so that the test block 130 is subjected to the combined action of vertical pressure, lateral pressure and simulated deep-sea hydraulic pressure to perform compression creep test, and the mechanical response process of the material under deep-sea environment is truly restored. The entire fixture realizes multi-dimensional stress loading through a single driving source, has compact structure, precise control, and is suitable for long-term stable test.

[0053] The test process of the compression creep test fixture is as follows: the test block 130 is placed into and positioned in the first cavity 111, the bottom structure of the pressure-resistant shell 4 is closed, then one end of each of the two lateral pressing blocks 15 extends into the first cavity 111, a preset amount of simulated seawater is introduced into the first cavity 111 through the liquid inlet, the liquid inlet is closed after the liquid injection is completed, so that the first cavity 111 is in a sealed state. The driving device 14 is started, the driving device 14 drives the upper pressing plate 13 to slide vertically downward along the base 12, and synchronously drives the transmission member 2 installed at the bottom of the upper pressing plate 13 to move downward, the upper pressing plate 13 pushes the lateral pressing block 15 to slide laterally along the base 12 through the hinged connecting rod 16, so that one end of the lateral pressing block 15 abuts against the test block 130; at the same time, under the continuous downward pressure of the transmission member 2, the side wall inclined surface of the transmission member 2 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 stable hydraulic pressure, the first end of the push rod 5 moves downward synchronously with the transmission member 2, and the first end of the push rod 5 moves downward synchronously with the transmission member 2, thereby assisting in maintaining the hydraulic pressure of the cavity and being capable of abutting against the test block 130 to exert axial load; when the transmission member 2 moves to the first vertical surface 21 and contacts the sliding member 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 compression creep test stage of multi-stress coupling.

[0054] The raw materials and equipment used in the present application are conventional raw materials and equipment in the field unless otherwise specified; the methods used in the present application are conventional methods in the field unless otherwise specified.

[0055] The above is only the preferred embodiment of the present application, and does not limit the present application, and any simple modification, change and equivalent transformation of the above embodiment according to the technical essence of the present application still belongs to the protection scope of the technical scheme of the present application.

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. A 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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