Testing device for testing service life of disc spring under special working condition

Abstract

The invention discloses a device for testing the service life of a disc spring under a special working condition, which belongs to the technical field of disc spring testing and comprises a base and a disc spring body, four testing cylinders and a testing lifting plate are sequentially arranged above the base, a limiting cover plate is arranged above each testing cylinder, a driving assembly and a fixing rod are arranged in each testing cylinder, and a liquid storage tank is fixed on the outer side wall of the base. By arranging the wave-shaped action grooves and the spraying channels which are alternately arranged, the driven pressing plate synchronously generates axial lifting motion during rotation so as to compress and release the disc spring body, acid mist is sprayed to the surface of the disc spring body through the spraying pipe, fatigue stress and a dynamic corrosion environment are synchronously applied in a single device, and the service life of the device is prolonged. Through cooperative use of the action gear and the adjusting assembly, when the rotating shaft is adjusted to rotate, the action gear generates a time sequence difference by using the notch to control the locking and unlocking states of the locking blocks with different heights in the fixed rod, so that sequential independent loading test of odd-numbered and even-numbered disc springs in the same disc spring group is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of disc spring life test, and particularly relates to a disc spring use test device under special working conditions. BACKGROUND

[0002] The disc spring is an elastic element in the shape of a truncated conical disc, which stores energy through elastic deformation under axial load. Due to its high load capacity and small deformation space characteristics, it is widely used in electrolytic cells, chemical valves and other special working conditions with coexistence of strong corrosion and high-frequency fatigue load. The existing disc spring service life test device usually applies unidirectional compression load through hydraulic or mechanical pressure head, and it is difficult to simulate the periodic reciprocating stress caused by vibration or pressure fluctuation in the actual working condition (such as high-frequency fretting wear in the start-stop process of electrolytic cell). At the same time, the corrosion medium in the existing disc spring service life test device is usually applied by immersion or static spraying, and it is difficult to achieve uniform coverage of the medium in the dynamic mechanical loading process, and it is difficult to simulate the real use scene, which leads to the distortion of the interaction simulation of chemical corrosion and mechanical fatigue, and affects the final test results. SUMMARY

[0003] The purpose of the present application is to solve the problem that the disc spring life test is difficult to simulate the actual working condition in the prior art, and a disc spring service life test device under special working conditions is provided.

[0004] In order to achieve the above purpose, the technical scheme is as follows: A disc spring service life test device under special working conditions, comprising a base and a disc spring body, four test barrels are arranged on the surface of the base, a limiting cover plate is arranged above the test barrel, a driving assembly and a fixing rod are arranged in the test barrel, a locking assembly is arranged in the fixing rod, a liquid storage tank is fixedly connected to the outer side wall of the base, a spraying pipe is arranged on the top of the liquid storage tank, sliding rods are arranged at the four corners of the surface of the base, test push cylinders are arranged on the opposite sides of the base, a test lifting plate is connected to the base through the sliding rods, and an action mechanism is arranged below the center of the test lifting plate. The inside of the fixing rod is provided with a locking assembly, the outer side wall of the fixing rod is provided with a key groove and a thread, the rod body of the fixing rod is provided with a plurality of driven pressure plates, the two ends of the fixing rod are connected with a pressing block through a thread, and the driven pressure plates are alternately sleeved on the rod body of the fixing rod. The action mechanism comprises four installation sleeves corresponding to the test barrels one by one and an adjusting assembly, the top of the installation sleeve is fixedly connected with the test lifting plate, the installation sleeve is provided with a positioning pushing assembly, and the adjusting assembly is arranged at the center of the test lifting plate.

[0005] Preferably, the inner side wall of the test cylinder is provided with a plurality of action grooves, the lowest point of the inner side wall of the test cylinder corresponding to each action groove is provided with four through grooves in the axial direction, the inner wall of the cylinder wall of the test cylinder is provided with a spraying channel communicated with the spraying pipe, the spraying channel is provided with a plurality of outlets penetrating the inner side wall, the outlets are arranged in an alternating arrangement with the action grooves, and each outlet is fixedly installed with a nozzle.

[0006] Preferably, the inner side wall of the driven pressure plate is fixedly connected with a plurality of limiting keys matched with the key grooves, and the outer side wall of the driven pressure plate is fixedly connected with an action rod matched with the through grooves.

[0007] Preferably, the locking assembly comprises a locking rod rotatably mounted in the fixed rod in the axial direction, the rod body of the locking rod is fixedly connected with a plurality of locking rings, the locking rings are arranged at equal intervals in pairs, the plurality of locking rings are provided with through holes matched with the key grooves, and the bottom of the locking rod is provided with a hexagonal insertion slot.

[0008] Preferably, the driving assembly comprises a rotating sleeve, the inner side wall of the rotating sleeve is fixedly connected with a plurality of limiting keys matched with the key grooves, the center of the rotating sleeve is rotatably connected with a rotating rod, and the upper segment of the rod body of the rotating rod is hexagonal.

[0009] Preferably, the positioning and pushing assembly comprises a plurality of annular grooves matched with the positions of the disc springs in the fixed state and sliding grooves matched with the through grooves, the annular grooves and the sliding grooves are provided in the inner side wall of the mounting sleeve, the annular grooves are rotatably connected with action tooth rings, the annular grooves are open to the outer side wall at the position of the action assembly, and the sliding grooves are slidably connected with locking blocks.

[0010] Preferably, the side of the action tooth ring away from the test cylinder is provided with a tooth surface, the side of the action tooth ring close to the test cylinder is fixedly connected with a plurality of push blocks arranged at equal intervals, and the side of the push block corresponding to the rotation direction of the action tooth ring is provided with an inclined surface.

[0011] Preferably, the locking block is provided with a through hole matched with the action tooth ring, one end of the locking block away from the test cylinder is connected with the inner side wall of the annular groove through a return spring, and the other end of the locking block close to the test cylinder is located in the through groove.

[0012] Preferably, the adjusting assembly comprises an adjusting rotating shaft fixedly installed at the center of the surface of the test lifting plate, the outer wall of the adjusting rotating shaft is fixedly connected with action gears at the open positions of each annular groove, and a plurality of the action gears are arranged at equal intervals and staggered with gaps in the vertical direction.

[0013] Compared with the prior art, the application has the following advantages: 1. The application is characterized in that the wave-shaped action grooves and the spray channels are arranged alternately, so that the driven pressure plate performs axial reciprocating lifting motion synchronously during rotation, realizing periodic compression and release of load on the disc spring body, and at the same time, the acid mist medium is uniformly sprayed to the surface of the disc spring during the dynamic rotation and lifting of the disc spring, realizing synchronous simulation of fatigue stress and dynamic corrosion environment in a single device, and solving the working condition distortion problem caused by the separation of mechanical load and corrosion medium in traditional testing.

[0014] 2. The application is characterized in that the action gear and the adjusting assembly are used in cooperation, so that when the rotating shaft rotates, the action gear generates a time difference through the staggered gaps, thereby controlling the locking and unlocking states of the different height locking blocks, and realizing the separate loading test of the odd and even disc springs in the same disc spring group. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The application provides a special working condition disc spring service life test device overall structure schematic view; Figure 2 The application provides a special working condition disc spring service life test device overall structure assembly view; Figure 3 The application provides a special working condition disc spring service life test device mounting sleeve and adjusting assembly structure sectional view; Figure 4 The application provides a special working condition disc spring service life test device mounting sleeve structure sectional view; Figure 5 The application provides a special working condition disc spring service life test device action gear ring and locking block structure assembly view; Figure 6 The application provides a special working condition disc spring service life test device test cylinder internal structure sectional view; Figure 7 The application provides a special working condition disc spring service life test device spray channel structure sectional view; Figure 8 The application provides a special working condition disc spring service life test device drive assembly structure sectional view; Figure 9 The application provides a special working condition disc spring service life test device disc spring body, fixed rod, driven pressure plate and compression block structure assembly view; Figure 10 The application provides a special working condition disc spring service life test device disc spring body, fixed rod, driven pressure plate and compression block structure sectional view; Figure 11 A structure assembly view of a fixed rod and a locking rod in a disc spring service life test device under a special working condition is provided in the present application. Figure 12 A structure schematic view of an adjusting assembly in the disc spring service life test device under the special working condition is provided in the present application.

[0016] In the figure: 1, base; 2, disc spring body; 3, test cylinder; 301, limit cover plate; 4, fixed rod; 5, liquid storage tank; 6, spraying pipe; 7, test push cylinder; 8, test lifting plate; 9, keyway; 10, driven pressing plate; 11, pressing block; 12, mounting sleeve; 13, action groove; 14, through groove; 15, spraying channel; 16, nozzle; 17, action rod; 18, locking rod; 19, locking ring; 20, insertion slot; 21, rotating sleeve; 22, rotating rod; 23, annular groove; 24, locking block; 25, action tooth ring; 26, push block; 27, adjusting rotating shaft; 28, action gear. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0018] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0020] Embodiment, refer to Figures 1 to 12The utility model relates to a special working condition disc spring service life test test device, including base 1 and disc spring body 2, the surface of base 1 is equipped with four test tubes 3, and the top of test tube 3 is equipped with limit cover plate 301, and the inside of test tube 3 is equipped with drive assembly and fixed rod 4, and the inside of fixed rod 4 is equipped with locking assembly, and the outer lateral wall of base 1 is fixedly connected with liquid storage tank 5, and the top of liquid storage tank 5 is equipped with spray pipe 6, and the four corners of base 1 surface are equipped with slide bar, and the opposite sides of base 1 are equipped with test push cylinder 7, and the top of base 1 is connected with test lifting plate 8 through slide bar, and the center of test lifting plate 8 is equipped with action mechanism below, The inside of fixed rod 4 is equipped with locking assembly, and the outer lateral wall of fixed rod 4 is equipped with key groove 9 and screw thread, and the rod body of fixed rod 4 is equipped with a plurality of driven pressure plates 10, and the both ends of fixed rod 4 are connected with compression block 11 through screw thread, and compression block 11 is used for fixing the both ends of disc spring group, and driven pressure plate 10 is used for separating and transmitting load to single disc spring body 2, and driven pressure plate 10 and disc spring body 2 are alternately sleeved on the rod body of fixed rod 4, forming the disc spring group to be tested, The action mechanism includes four installation sleeves 12 corresponding to test tube 3 one by one and an adjusting assembly, the top of installation sleeve 12 is fixedly connected with test lifting plate 8, the inside of installation sleeve 12 is provided with positioning push assembly, the adjusting assembly is arranged at the center of test lifting plate 8, test lifting plate 8 is driven along slide bar by test push cylinder 7, and then drives installation sleeve 12 and the positioning push assembly in the inside of installation sleeve 12 to move, so as to execute the loading test to selected disc spring body 2.

[0021] Further, the inner lateral wall of test tube 3 is equipped with a plurality of action grooves 13, the inner lateral wall of test tube 3 is equipped with four through grooves 14 along the axial direction at the lowest point corresponding to each action groove 13, the action groove 13 located at the center of test tube 3 is arranged as annular, the rest action grooves 13 are arranged as circumferential wave shape and are mirror image arranged relative to the action groove 13 at the center, for guiding driven pressure plate 10 to generate reciprocating lifting movement when executing rotary extrusion action, the inside of the cylinder wall of test tube 3 is equipped with spray channel 15 in communication with spray pipe 6, the spray channel 15 is equipped with a plurality of outlets penetrating the inner lateral wall, the outlets are alternately arranged with action grooves 13, and each outlet is fixedly installed with nozzle 16, for spraying acid mist medium to the rotating disc spring body 2 in the aging stage; The further advantage is that the wave-shaped action groove 13 cooperates with the limiting key to force the driven pressure plate 10 to move regularly and reciprocally along the fixed rod 4 in the axial direction during rotation, thereby applying periodic compression and release of mechanical load to the disc spring body 2 to simulate fatigue stress, and the nozzles 16 of the spray channel 15 are alternately arranged with the action groove 13, which can uniformly and fully spray acid mist medium to each surface of the disc spring body 2 during rotation and lifting of the disc spring to simulate the corrosion environment, thereby realizing synchronous simulation of mechanical load and corrosion environment and effectively simulating the combined failure mode (fatigue and corrosion) of the disc spring during operation in the electrolytic cell, thereby improving the authenticity of the test.

[0022] Further, the inner side wall of the driven pressure plate 10 is fixedly connected with a plurality of limiting keys matching the key grooves 9, so that the driven pressure plate 10 can slide along the fixed rod 4 in the axial direction but cannot rotate relative to the fixed rod 4, and the outer side wall of the driven pressure plate 10 is fixedly connected with an action rod 17 matching the through groove 14, and the action rod 17 extends into the action groove 13, and the movement track of the action rod 17 is jointly defined by the shape (annular or wave-shaped) of the action groove 13 and the through groove 14.

[0023] Further, the locking assembly includes a locking rod 18 rotatably installed in the fixed rod 4 in the axial direction, and the rod body of the locking rod 18 is fixedly connected with a plurality of locking rings 19 provided with through holes matching the key grooves 9, so that when the locking rod 18 is rotated by 45°, the through holes of the locking rings 19 are out of position with the key grooves 9 of the fixed rod 4, thereby locking the compression block 11 on the fixed rod 4, and the bottom of the locking rod 18 is provided with a hexagonal insertion slot 20 for cooperating with the upper hexagonal rod body of the rotating rod 22 of the driving assembly to transmit the rotating torque; Further, the driving assembly includes a rotating sleeve 21, the inner side wall of the rotating sleeve 21 is fixedly connected with a plurality of limiting keys matching the key grooves 9 for cooperating with the key grooves 9 of the fixed rod 4 to drive the fixed rod 4 to rotate, and the center of the rotating sleeve 21 is rotatably connected with a rotating rod 22, and the upper rod body of the rotating rod 22 is hexagonal, and the rotating rod 22 is used to drive the locking rod 18 to rotate to perform the locking and unlocking actions of the compression block 11; Further, the positioning and pushing assembly includes a plurality of annular grooves 23 matching the positions of the disc spring bodies 2 in the fixed state and a sliding groove matching the through groove 14, and the annular grooves 23 and the sliding groove are both provided in the inner side wall of the mounting sleeve 12, the annular groove 23 is rotatably connected with an action gear ring 25 as a driving element, the outer side wall of the annular groove 23 corresponding to the action assembly is open, so that the tooth surface of the action gear ring 25 is exposed, and the action gear ring 25 can be engaged with the gear set at this position, and the sliding groove is slidably connected with a locking block 24 for extending into the through groove 14 to limit the movement of the action rod 17 in the locked state, and retracting to allow the action rod 17 to pass in the released state; Further, the side of the action gear ring 25 away from the test cylinder 3 is provided with a tooth surface for meshing with the gear set in the adjusting assembly, and the side of the action gear ring 25 close to the test cylinder 3 is fixedly connected with a plurality of push blocks 26 arranged at equal intervals, for pushing the locking block 24 to move along the through groove 14, and the side of the push block 26 corresponding to the rotation direction of the action gear ring 25 is provided with an inclined surface, so that the locking block 24 can be smoothly pushed when the push block 26 rotates; Further, the locking block 24 is provided with a through hole matching the action gear ring 25, allowing the action gear ring 25 to rotate inside the locking block 24, and the end of the locking block 24 away from the test cylinder 3 is connected with the inner side wall of the annular groove 23 through a return spring, providing a return spring force, and the end of the locking block 24 close to the test cylinder 3 is located in the through groove 14, for limiting the movement of the action rod 17 at the position of the through groove 14, when the push block 26 rotates into the inside of the locking block 24, the locking block 24 is pushed to extend out to lock against the return spring force, and when the push block 26 rotates away, the return spring makes the locking block 24 retract to unlock; Further, the adjusting assembly comprises an adjusting rotating shaft 27 fixedly installed on the center of the surface of the test lifting plate 8, and the outer wall of the adjusting rotating shaft 27 is fixedly connected with an action gear 28 at the opening of each annular groove 23, and a plurality of action gears 28 are staggered with gaps in the vertical direction, for sequentially driving the locking blocks 24 to lock and unlock; The above further benefits are that, through the staggered arrangement of the gaps, when the adjusting rotating shaft 27 rotates, different height positions of the action gear ring 25 can be sequentially driven to rotate in a specific time sequence (odd-numbered positions first, even-numbered positions later), thereby controlling the locking and unlocking states of the corresponding locking blocks 24, and achieving interval grouping loading test of the disc springs.

[0024] It should be noted that: Figure 2 and Figure 12 As shown in the above, the rotating sleeve 21, the rotating rod 22 and the adjusting rotating shaft 27 are driven by motors in the prior art, the motors for driving the rotating sleeve 21 and the rotating rod 22 are located inside the mounting seat, and the motor for driving the adjusting rotating shaft 27 is located above the test lifting plate 8.

[0025] In use, the compression block 11 is connected to the fixed rod 4 from the bottom, the driven pressure plate 10 and the disc spring body 2 are alternately sleeved on the rod body of the fixed rod 4 in sequence to form a disc spring group to be tested, and then the other compression block 11 is connected to the top of the fixed rod 4. When the test is ready, the bottom of the fixed rod 4 is inserted into the drive assembly, and during the insertion process, the action rod 17 on the outer wall of the driven pressure plate 10 slides along the through slot 14 to limit the installation process. After the installation is completed, the gear set is rotated by the adjusting shaft 27, and the action gear ring 25 is rotated by the action gear 28 in the gear set. When the action gear ring 25 rotates, the push block 26 smoothly enters the inside of the locking block 24 by using the inclined surface, thereby pushing the locking block 24 to extend, blocking the part of the action slot 13 that is connected with the through slot 14, completing the limiting, avoiding the jamming phenomenon caused by the driven pressure plate 10 entering the through slot 14 when performing the extrusion action. The above action process will not be described below. When aging, the acidic medium in the liquid storage tank 5 is pumped to the nozzle 16 through the delivery pipe and the spray pipe 6 by the water pump in the prior art, and the acidic medium is sprayed to the outside wall of the disc spring body 2 through the nozzle 16, accelerating the corrosion of the disc spring body 2, thereby simulating the corrosion environment affected by acid mist when used in the electrolytic cell. At the same time, the installation seat drives the fixed rod 4 to rotate the driven pressure plate 10 in the action slot 13, so that the outer peripheral wall of the disc spring body 2 can uniformly contact the acidic medium. At the same time, the shape of the action slot 13 and the cooperation of the key groove 9 and the limiting key can make the driven pressure plate 10 perform reciprocating lifting action during rotation. When the driven pressure plate 10 rises, it vertically extrudes the disc spring body 2 to apply axial compression load, and when the driven pressure plate 10 descends, it completely releases the load, forming a cyclic load, thereby simulating the fatigue stress of the disc spring during long-term use by using mechanical action, and achieving the acceleration of the comprehensive aging of the disc spring by cooperating with the corrosion environment. After the above aging process is performed for a suitable time, the test is started. During the test, the drive assembly, the adjusting assembly and the test push cylinder 7 perform the following action groups in sequence: Action one: rotate the sleeve 21 to the preset position to align and lock all the action rods 17 of the driven pressure plates 10 with the through slots 14, and then rotate the rod 22 to drive the locking rod 18 to rotate by 45°, and lock the top and bottom compression blocks 11 on the fixed rod 4 by the locking ring 19, to prepare for the grouped test; Action two: the adjusting motor drives the adjusting shaft 27 to rotate the gear set, and through the specific timing of the gap of the action gear 28, only the locking of the driven pressure plates 10 above the odd-numbered disc springs is released, and then the test push cylinder 7 retracts to lower the test lifting plate 8. The locking blocks 24 still in the locked state on the installation sleeve 12 push these odd-numbered driven pressure plates 10 which have been unlocked to descend along the through slot 14, thereby extruding the disc spring body 2 between these odd-numbered driven pressure plates 10 and the adjacent locked components (even-numbered driven pressure plates 10 and bottom compression blocks 11) below them, completing the pressure test of the odd-numbered disc spring group; Then the test push cylinder 7 retraction to pull the test lifting plate 8 down, the test lifting plate 8 down driven installation sleeve 12 synchronous descent, installation sleeve 12 down, through the non-locked locking block 24 to push each loss of the locking driven pressure plate 10 in the through slot 14 sliding down, in the process of descending, loss of the locking driven pressure plate 10 and located below and locked driven pressure plate 10 distance decreases, and extrude the disc spring body 2 located here, half of the disc spring body 2 pressure test; Action three: adjust the motor drive gear set continues to rotate, relocking all driven pressure plate 10, then release the driven pressure plate 10 above the even number disc spring lock; Then the test push cylinder 7 elongation to push the test lifting plate 8 up, the locking block 24 from bottom to top push these have been unlocked even number driven pressure plate 10 along the through slot 14 up, so as to extrude the disc spring body 2 between these even number driven pressure plate 10 and its above adjacent locked components (odd number driven pressure plate 10 and top pressure block 11), in the process, through the limiting cover plate 301 prevent fixed rod 4 out, complete the pressure test of even number disc spring group.

[0026] The above, only for the preferred specific embodiments of the present application, but the scope of protection of the present application is not limited to this, any skilled in the art of the technical personnel in the technical range of the present application disclosed according to the technical scheme of the present application and the invention concept of equivalent replacement or change, should be covered in the scope of protection of the present application.

Claims

1. A special working condition disc spring service life test device, comprising a base (1) and a disc spring body (2), characterized in that, The bottom (1) surface is provided with four test tubes (3), the test tube (3) is provided with a limit cover plate (301) above, the test tube (3) is provided with a drive assembly and a fixed rod (4) inside, the fixed rod (4) is provided with a locking assembly inside, the outer side wall of the bottom (1) is fixedly connected with a liquid storage tank (5), the top of the liquid storage tank (5) is provided with a spray pipe (6), the four corners of the bottom (1) surface are provided with a sliding rod, the opposite sides of the bottom (1) are provided with a test push cylinder (7), the bottom (1) is connected with a test lifting plate (8) through the sliding rod, the center of the test lifting plate (8) is provided with a action mechanism below; The inside of the fixed rod (4) is provided with a locking assembly, the outer side wall of the fixed rod (4) is provided with a key groove (9) and a thread, the rod body of the fixed rod (4) is provided with a plurality of driven pressure plates (10), the both ends of the fixed rod (4) are both connected with a pressing block (11) through a thread, the driven pressure plate (10) and the disc spring body (2) are alternately sleeved on the rod body of the fixed rod (4); The action mechanism comprises four installation sleeves (12) corresponding to the test tubes (3) one by one and an adjusting assembly, the top of the installation sleeve (12) is fixedly connected with the test lifting plate (8), the installation sleeve (12) is provided with a positioning pushing assembly inside, and the adjusting assembly is arranged at the center of the test lifting plate (8).

2. The device according to claim 1, characterized in that, The inner side wall of the test tube (3) is provided with a plurality of action grooves (13), the action groove (13) located at the center of the test tube (3) is arranged in an annular shape, the remaining action grooves (13) are arranged in a circumferential wave shape and are mirror images relative to the central action groove (13), the inner side wall of the test tube (3) is provided with four through grooves (14) corresponding to the lowest points of each action groove (13) along the axial direction, the inside of the cylinder wall of the test tube (3) is provided with a spray channel (15) in communication with the spray pipe (6), the spray channel (15) is provided with a plurality of outlets penetrating through the inner side wall, the outlets and the action grooves (13) are arranged alternately, and each outlet is fixedly provided with a nozzle (16).

3. The device according to claim 2, characterized in that, The inner side wall of the driven pressure plate (10) is fixedly connected with a plurality of limit keys matched with the key grooves (9), and the outer side wall of the driven pressure plate (10) is fixedly connected with an action rod (17) matched with the through grooves (14).

4. The device according to claim 1, characterized in that, The locking assembly comprises a locking rod (18), the locking rod (18) is rotatably installed in the fixed rod (4) along the axial direction, the rod body of the locking rod (18) is fixedly connected with a plurality of locking rings (19), the locking rings (19) are arranged at equal intervals in pairs, a plurality of the locking rings (19) are provided with through holes matched with the key grooves (9), and the bottom of the locking rod (18) is provided with a hexagonal insertion slot (20).

5. The device according to claim 1, characterized in that, The drive assembly comprises a rotating sleeve (21), the inner side wall of the rotating sleeve (21) is fixedly connected with a plurality of limit keys matched with the key grooves (9), the center of the rotating sleeve (21) is rotatably connected with a rotating rod (22), and the upper section of the rod body of the rotating rod (22) is hexagonal.

6. The device according to claim 5, characterized in that, The positioning pushing assembly comprises a plurality of annular grooves (23) matched with the position of the disc spring body (2) in the fixed state and a sliding groove matched with the through groove (14), the annular grooves (23) and the sliding groove are arranged on the inner side wall of the mounting sleeve (12), the annular groove (23) is rotationally connected with an action gear ring (25), the annular groove (23) is open on the outer side wall corresponding to the action assembly, and the sliding groove is slidably connected with a locking block (24).

7. The device according to claim 6, characterized in that, The side of the action gear ring (25) away from the test cylinder (3) is provided with a tooth surface, the side of the action gear ring (25) close to the test cylinder (3) is fixedly connected with a plurality of push blocks (26) arranged at equal intervals, and the side of the push block (26) corresponding to the rotation direction of the action gear ring (25) is provided with an inclined surface.

8. The device according to claim 6, characterized in that, The locking block (24) is provided with a through hole matched with the action gear ring (25), one end of the locking block (24) away from the test cylinder (3) is connected with the inner side wall of the annular groove (23) through a return spring, and the end of the locking block (24) close to the test cylinder (3) is located in the through groove (14).

9. The device according to claim 8, characterized in that, The adjusting assembly comprises an adjusting rotating shaft (27), the adjusting rotating shaft (27) is fixedly installed on the center of the surface of the test lifting plate (8), the outer wall of the adjusting rotating shaft (27) is fixedly connected with an action gear (28) at the open position of each annular groove (23), and a plurality of the action gears (28) are sequentially and staggeredly provided with notches in the vertical direction.

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