Continuous impact mechanism and breather valve fatigue test device

Abstract

The invention relates to the technical field of fatigue test devices, in particular to a continuous impact mechanism and a breather valve fatigue test device.The continuous impact mechanism comprises a fixed end face which is relatively static in the vertical direction; the impact end face is matched with the fixed end face and can directionally move in the vertical direction; the driving assembly is provided with a moving end capable of moving back and forth in the vertical direction, the moving end is connected with the impact end face through a flexible connecting assembly, and the flexible connecting assembly does not have the deformation recovery capacity when the deformation quantity is smaller than L; wherein any one-way displacement M of the movable end in the vertical direction and the maximum displacement N of the impact end face relative to the fixed end face in the same one-way all the time meet the following formula: Mgt; m-N is less than or equal to L. By means of the flexible connecting assembly, it can be ensured that the impact face after the valve element falls back makes full contact with the fixing face of the valve seat, no obvious extra acting force is generated, and the valve element is closer to a real use scene.

Description

Technical Field

[0001] The present invention relates to the technical field of fatigue test devices, and particularly to a continuous impact mechanism and a fatigue test device for a breathing valve. Background Art

[0002] A breathing valve is a device used to control the pressure balance in a storage tank. Its core components include a valve body (or valve seat) and a valve core, and other auxiliary components include a valve cover and a guide rod. The breathing valve is based on the balance between the gas pressure and a preset reaction force. When the pressure in the storage tank exceeds the set value, the valve core is pushed up along the direction of the guide rod to open and release the gas. After the pressure is released, the valve core moves back along the guide rod in the reverse direction and falls onto the end face of the valve seat, once again isolating the inside and outside of the storage tank to form a seal. Breathing valves are generally classified into gravity breathing valves and spring breathing valves according to their working principles. The gravity breathing valve works by balancing the weight of the valve disc itself with the upward lifting force generated by the pressure difference inside and outside the tank; the spring breathing valve works by balancing the deformation force of the spring with the thrust generated by the pressure difference inside and outside the tank.

[0003] Since the valve core of the breathing valve will frequently rise and fall during operation, after long-term use, it is inevitable that there will be wear and fatigue at the connection with the valve seat, which may affect the sealing performance. To test its service life, the usage state of the valve core can be simulated. The rising and falling process of the valve core is simulated multiple times in a short time, and the total number of rises and falls of the valve core under the set sealing requirements is recorded to measure its fatigue resistance, and then its true service life can be obtained.

[0004] However, in the prior art, it is often difficult to simulate a rising and falling process close to the real situation for the fatigue test of the valve core. This is mainly because during the process of lifting and lowering the valve core by an external device, due to the limitations of the machining accuracy and control accuracy of the components, it is difficult to grasp the displacement distance of the external device controlling the valve core to fall. For example, when the downward displacement distance of the valve core is too small, the contact surface between the valve core and the valve seat has not been fully contacted; when the downward displacement distance of the valve core is too large, the external device itself will exert an additional force on the contact surface between the valve core and the valve seat, resulting in inaccurate test results. Summary of the Invention

[0005] In this part, as well as in the abstract and title of the specification of the present application, some simplifications or omissions may be made to avoid obscuring the purpose of this part, the abstract of the specification, and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] To solve the deficiencies of the prior art, an object of the present invention is to provide a continuous impact mechanism.

[0007] To achieve the above object, the present invention adopts the following technical solution: A continuous impact mechanism includes

[0008] A fixed end face, which is relatively stationary in the vertical direction;

[0009] An impact end face, which cooperates with the fixed end face and can move directionally in the vertical direction; and,

[0010] A driving assembly, which has a moving end that can move back and forth in the vertical direction,

[0011] The moving end is connected to the impact end face through a flexible connection assembly, and the flexible connection assembly does not have the ability to recover deformation by itself when the deformation amount is less than L;

[0012] Wherein, any one-way displacement amount M of the moving end in the vertical direction and the maximum displacement amount N of the impact end face relative to the fixed end face in the same one-way always satisfy: M > N, and M - N ≤ L.

[0013] As a preferred solution of the continuous impact mechanism of the present invention, wherein: the flexible connection assembly includes a first connection segment connected to the moving end and a second connection segment connected to the impact end face;

[0014] The first connection segment moves directionally in the vertical direction relative to the second connection segment,

[0015] A first limiting portion is provided on the side of the first connection segment away from the moving end,

[0016] A second limiting portion is provided on the side of the second connection segment away from the impact end face,

[0017] The first limiting portion and the second limiting portion have a projection overlapping area S1 with an area greater than in the vertical direction.

[0018] As a preferred solution of the continuous impact mechanism of the present invention, wherein: the first limiting portion and the second limiting portion form a nested structure;

[0019] When the first limiting portion is located in the inner layer of the nested structure, the side surfaces of the first limiting portion and the second limiting portion close to each other are both conical structures with a smaller upper part and a larger lower part;

[0020] When the second limiting portion is located in the inner layer of the nested structure, the side surfaces of the first limiting portion and the second limiting portion close to each other are both conical structures with a larger upper part and a smaller lower part.

[0021] As a preferred solution of the continuous impact mechanism of the present invention, wherein: the first connection segment and the second connection segment are both connecting pipes nested with each other, and the first limiting portion and the second limiting portion are both baffles provided at the ends of the connecting pipes;

[0022] An opening is provided at the center of the baffle of the outer connecting pipe,

[0023] The cross-sectional dimension D1 of the inner connecting pipe in the horizontal direction is smaller than the opening dimension D2,

[0024] The cross-sectional dimension D3 of the baffle located in the inner connecting pipe in the horizontal direction is smaller than the inner wall dimension D4 of the outer connecting pipe.

[0025] As a preferred embodiment of the continuous impact mechanism of the present invention, wherein: between the mobile end and the first connecting section, and / or between the impact end face and the second connecting section, they are connected by a universal joint.

[0026] As a preferred embodiment of the continuous impact mechanism of the present invention, wherein: the flexible connection assembly includes a first connecting section rotatably connected to the mobile end, and a second connecting section rotatably connected to the impact end face;

[0027] Between the first connecting section and the second connecting section is a rotational connection, and the range of the rotation angle C between the first connecting section and the second connecting section is: 0° < C < 180°.

[0028] As a preferred embodiment of the continuous impact mechanism of the present invention, wherein: the flexible connection assembly includes at least one of a rope, a wire, a belt, and a chain.

[0029] As a preferred embodiment of the continuous impact mechanism of the present invention, wherein: the speed V1 at which the mobile end moves downward in the vertical direction is greater than the speed V2 at which the impact end face freely falls.

[0030] As a preferred embodiment of the continuous impact mechanism of the present invention, wherein: it further includes a trigger member provided on the movement route above the impact end face, and when the impact end face moves upward to a preset height, it is blocked by the trigger member;

[0031] The trigger member is a first elastic element T1, and the deformation direction of the first elastic element T1 is parallel to the vertical direction;

[0032] The additional speed V0 obtained by the impact end face under the elastic force of the first elastic element T1 when moving downward in the vertical direction, the speed V1 at which the mobile end moves downward in the vertical direction, and the speed V2 at which the impact end face freely falls satisfy: V1 > (V0 + V2).

[0033] As a preferred embodiment of the continuous impact mechanism of the present invention, wherein: it further includes a trigger member provided on the movement route above the impact end face, and when the impact end face moves upward to a preset height, it is blocked by the trigger member and stops moving upward;

[0034] The flexible connection assembly further includes a locking member provided between the first connecting section and the second connecting section;

[0035] The locking member is used to fix the first connecting section and the second connecting section after the mobile end moves down to the displacement M, and release the fixation between the first connecting section and the second connecting section after the impact end face is blocked by the triggering member.

[0036] As a preferred solution of the continuous impact mechanism of the present invention, wherein: the locking member includes a first blocking member and a second blocking member respectively arranged on one of the first connecting section and the second connecting section;

[0037] At least one of the first blocking member and the second blocking member is slidable to adjust the area of the overlapping region S2 of the projections of the first blocking member and the second blocking member in the vertical direction.

[0038] As a preferred solution of the continuous impact mechanism of the present invention, wherein: a groove is formed by inward depression on one side of the first blocking member, and a clamping block is connected in the groove through a second elastic element T2, and the outer dimension of the clamping block is adapted to the inner wall dimension of the groove;

[0039] The second blocking member has a clamping groove for cooperating with the clamping block;

[0040] When the clamping block is engaged into the clamping groove, the frictional resistance between the clamping block and the clamping groove in the vertical direction is greater than the gravity of the impact end face.

[0041] As a preferred solution of the continuous impact mechanism of the present invention, wherein: the first connecting section and the second connecting section form a nested structure;

[0042] The second blocking member is located in the inner layer of the nested structure, and the second blocking member is arranged at the end of the first connecting section or the second connecting section.

[0043] The beneficial effect of a continuous impact mechanism of the present invention: By the mutual cooperation of the flexible connection assembly, the fixed end face, the impact end face, and the driving assembly provided in the present invention, it can ensure that the impact surface after the valve core falls makes full contact with the fixed surface of the valve seat without generating obvious additional force, which is closer to the real use scenario.

[0044] To solve the deficiencies of the prior art, another object of the present invention is to provide a breathing valve fatigue test device.

[0045] To achieve the above object, the present invention adopts the following technical solution: A breathing valve fatigue test device includes the continuous impact mechanism described above, wherein: the fixed end face is located on the upper end face of the valve seat of the breathing valve, and the impact end face is located on the lower end face of the valve core of the breathing valve;

[0046] The breathing valve fatigue test device further includes,

[0047] A working platform, on which the driving assembly is installed; and,

[0048] A fixing component, which is arranged at the bottom of the working platform and is used for fixing the valve seat of the breathing valve.

[0049] As a preferred solution of the breathing valve fatigue test device of the present invention, wherein: the working platform includes a frame, a lifting platform arranged in the frame and movable in the vertical direction, and a positioning platform arranged on one side of the lifting platform and movable in the horizontal direction;

[0050] The driving component is installed on the positioning platform.

[0051] As a preferred solution of the breathing valve fatigue test device of the present invention, wherein: it further includes a stroke protection component,

[0052] The stroke protection component includes a controller connected to at least one of the lifting platform, the positioning platform and the driving component, a displacement sensor arranged in the moving direction of the lifting platform or / and the positioning platform, and an alarm device installed on one side of the frame and in communication connection with the displacement sensor, and the alarm device is in communication connection with the controller;

[0053] When the displacement sensor monitors that the displacement distance in the moving direction exceeds a preset value, it sends an alarm instruction to the alarm device,

[0054] After receiving the alarm instruction, the alarm device issues an alarm and sends an emergency stop instruction to the controller,

[0055] After receiving the emergency stop instruction, the controller controls the corresponding lifting platform, positioning platform or driving component to immediately stop moving or move in the reverse direction.

[0056] The beneficial effects of one kind of breathing valve fatigue test device of the present invention: through the mutual cooperation of the set stroke protection component, the working platform and the fixing component, the present invention can protect the displacement control process and prevent losses caused by collisions between the platform and the frame or the breathing valve.

[0057] In addition, it also has the same beneficial effects as a continuous impact mechanism, which will not be elaborated here. Description of the Drawings

[0058] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0059] Figure 1 Figures a-c are schematic structural diagrams of the process of the impact end face moving up and then falling back in Embodiment 1 of the present invention.

[0060] Figure 2 It is a schematic structural diagram of Embodiment 2 of the present invention.

[0061] Figure 3 It is a schematic structural diagram of Embodiment 3 of the present invention.

[0062] Figure 4 It is a schematic structural diagram of another implementation manner of Embodiment 3 of the present invention.

[0063] Figure 5 It is a schematic structural diagram of Embodiment 4 of the present invention.

[0064] Figure 6 It is a schematic structural diagram of Embodiment 5 of the present invention.

[0065] Figure 7 It is a schematic structural diagram of Embodiment 6 of the present invention.

[0066] Figure 8 It is a schematic structural diagram of Embodiment 7 of the present invention.

[0067] Figure 9 It is a schematic structural diagram of Embodiment 8 of the present invention.

[0068] Figure 10 It is a schematic structural diagram of Embodiment 9 of the present invention.

[0069] Figure 11 It is a schematic structural diagram of the locking member of Embodiment 9 of the present invention.

[0070] Figure 12 It is a three-dimensional structural schematic diagram of Embodiment 10 of the present invention.

[0071] Figure 13 It is a three-dimensional structural schematic diagram of another perspective of Embodiment 10 of the present invention.

[0072] Figure 14 It is a three-dimensional structural schematic diagram of yet another perspective of Embodiment 10 of the present invention. Detailed implementation manners

[0073] To make the objectives, features, and advantages of the present invention more obvious and understandable, the following provides a detailed description of the specific implementation manners of the present invention with reference to the accompanying drawings of the specification.

[0074] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0075] Secondly, the "one embodiment" or "embodiment" referred to herein means a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present invention. The "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an individual or alternative embodiment that is mutually exclusive with other embodiments.

[0076] Embodiment 1

[0077] Referring to Figure 1 , which is the first embodiment of the present invention. This embodiment provides a continuous impact mechanism that can ensure that the impact surface after the valve core falls makes full contact with the fixed surface of the valve seat without generating obvious additional forces, and is closer to the actual use scenario. It includes: a fixed end face 100, an impact end face 200, a driving component 300, and a flexible connection component 400. The driving component 300 drives the impact end face 200 to move back and forth relative to the fixed end face 100, thereby simulating the contact and separation between the valve core and the valve seat. By setting the flexible connection component 400, the influence of the additional force exerted by the driving component 300 on the impact end face 200 is reduced.

[0078] Specifically, the fixed end face 100 is relatively stationary in the vertical direction, that is, it is simulated as the upper end face of the valve seat opening upward and being in a stationary state during use; the impact end face 200 cooperates with the fixed end face 100 and can move directionally in the vertical direction, that is, it simulates the movement state of the lower end face of the valve core being lifted by the pressure in the storage tank and finally falling back.

[0079] Furthermore, the driving component 300 has a mobile end 301 that can move back and forth in the vertical direction. In this embodiment, the driving component 300 is composed of an electric cylinder and a servo motor in the prior art, including a fixed end for installation (such as the base of the servo motor, etc.), and a mobile end 301 that is driven to execute displacement. It is driven by the servo motor, and the mobile end 301 of the electric cylinder moves back and forth in the preset vertical direction.

[0080] The mobile end 301 is connected to the impact end face 200 through a flexible connection component 400. According to common knowledge, a flexible connector is a connector that can have a certain deformation ability during movement or deformation. In this embodiment, the flexible connection component 400 can ensure that when the distance between the mobile end 301 and the impact end face 200 connected at both ends of it changes, the flexible connection component 400 can follow and generate a certain amount of deformation. Specifically, when the mobile end 301 moves upward, after the flexible connection component 400 is subjected to the upward pulling force and the downward acting force of the self-gravity of the impact end face 200 on it, since the two acting forces are outward from both sides respectively, the flexible connection component 400 will increase in deformation in the vertical direction until the tension it receives overcomes the downward acting force of the gravity of the impact end face 200, and then the flexible connection component 400 will follow the mobile end 301 to drive the impact end face 200 to move upward, simulating the process of the valve core being lifted off the valve seat; after the impact end face 200 is pulled up to a certain height completely away from the fixed end face 100, the mobile end 301 moves downward, and the flexible connection component 400 and the impact end face 200 also fall under the action of gravity, simulating the process of the valve core falling back to the valve seat.

[0081] Among them, when the amount of deformation of the flexible connection component 400 is less than L, it does not have the ability to recover its deformation by itself, that is, when the amount of deformation of the flexible connection component 400 is less than L, it is a non-elastic deformation and it cannot actively recover its deformation by itself. For any one-way displacement amount M of the mobile end 301 in the vertical direction, and the maximum displacement amount N of the impact end face 200 relative to the fixed end face 100 in the same one-way always satisfy: M > N, and M - N ≤ L. Assuming that starting from the fixed end face 100, the impact end face 200 falls from the height N position, if only the displacement amount of the mobile end 301 moving downward is controlled to be N, but the actual displacement amount of the mobile end 301 may be slightly larger or slightly smaller than N. Although this error value may be small, it means incomplete contact or transitional contact on the contact surface between the impact end face 200 and the fixed end face 100, and both of these are quite different from the normal wear state, thus resulting in inaccurate test results.

[0082] When the displacement of the moving end 301 is controlled to be greater than N, first, it can be ensured that the impact end face 200 is in full contact with the fixed end face 100, and the impact end face 200 is stopped by the fixed end face 100 after the downward displacement N, that is, the end of the flexible connection component 400 connected to the impact end face 200 stops moving downward, and the other end continues to move downward by the displacement MN following the moving end 301. Therefore, as long as the displacement is less than L, the flexible connection component 400 will shrink and deform inward, that is, the length in the vertical direction is shortened, and at this time, the flexible connection component 400 is non-elastic deformation, and the mobile end 301 does not directly transmit to the impact end face 200 through the flexible connection component 400. The impact end face 200 is only affected by its own gravity and part of the gravity of the flexible connection component 400, and the gravity of the flexible connection component 400 itself can be set and confirmed artificially. The impact end face 200 as the valve core is generally made of metal materials such as stainless steel, and has a large dead weight. The flexible connection component 400 can be made of lightweight materials so that the contact surface between the impact end face 200 and the fixed end face 100 can be controlled to be non-transition contact, which will not have a significant impact on the test results. In this state, the contact surface between the impact end face 200 and the fixed end face 100 can be regarded as being affected only by the gravity of the impact end face 200, which is in line with the actual usage state of the gravity-type breathing valve.

[0083] Preferably, the speed V1 of the moving end 301 moving downward in the vertical direction is greater than the speed V2 of the free fall of the impact end face 200. After the impact end face 200 is pulled up to completely detach from the fixed end face 100 to a certain height as described above, the moving end 301 moves downward. When V1>V2, it is equivalent to that the downward movement speed of the upper end of the flexible connection component 400 is greater than the downward movement speed of the lower end, and then the flexible connection component 400 will deform and shorten inward, and then the moving end 301 does not directly transmit the force to the impact end face 200 through the flexible connection component 400. The impact end face 200 can be regarded as falling freely only under the action of gravity. The valve core of the gravity-type breathing valve falls freely under the action of gravity and collides with the fixed end face 100, and then the impact speed when the impact end face 200 contacts the fixed end face 100 is also close to the impact speed in the actual use state, so the fatigue test results tested are more in line with the actual data.

[0084] Example 2

[0085] Reference Figure 1 and Figure 2 , which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides an implementation of a flexible connection component 400.

[0086] Specifically, the flexible connection component 400 includes a first connection segment 401 connected to the mobile end 301 and a second connection segment 402 connected to the impact end face 200. Both the first connection segment 401 and the second connection segment 402 are made of rigid materials, but the first connection segment 401 can move directionally relative to the second connection segment 402 in the vertical direction, so that the overall flexible connection component 400 can grow or shorten in the vertical direction.

[0087] A first limiting portion 401a is provided on the side of the first connection segment 401 away from the mobile end 301, and a second limiting portion 402a is provided on the side of the second connection segment 402 away from the impact end face 200. The first limiting portion 401a and the second limiting portion 402a have a projection overlapping area S1 with an area greater than 0 in the vertical direction. When any one of the first limiting portion 401a and the second limiting portion 402a moves towards each other until they abut, it can drive the other to move through the overlapping area. For example, in this embodiment, when the mobile end 301 moves downward, after the first connection segment 401 stops moving when contacting the impact end face 200, the second connection segment 402 can continue to move downward relative to the first connection segment 401; when the mobile end 301 moves upward, the second connection segment 402 can move towards the first connection segment 401 within a certain range until the projection overlapping area S1 of the first limiting portion 401a and the second limiting portion 402a in the vertical direction abuts, and then the second connection segment 402 drives the first connection segment 401 to move upward together, thereby driving the first connection segment 401 to move upward.

[0088] The remaining structures are the same as those in Embodiment 1.

[0089] Embodiment 3

[0090] Refer to Figure 1 、 Figure 3 and Figure 4 This is the third embodiment of the present invention. Different from the previous embodiment, this embodiment provides another implementation manner of the first limiting portion 401a and the second limiting portion 402a, eliminating the influence caused by the frictional resistance generated when the first connection segment 401 and the second connection segment 402 move relative to each other.

[0091] Specifically, the first limiting portion 401a and the second limiting portion 402a form a nested structure, which can prevent the projection overlapping area S1 from being reduced to 0 due to the offset of the two in the horizontal direction. As Figure 4 shown, when the first limiting portion 401a is located in the inner layer of the nested structure, the side surfaces of the first limiting portion 401a and the second limiting portion 402a close to each other are both conical structures with a smaller upper part and a larger lower part; as Figure 3 shown, when the second limiting portion 402a is located in the inner layer of the nested structure, the side surfaces of the first limiting portion 401a and the second limiting portion 402a close to each other are both conical structures with a larger upper part and a smaller lower part.

[0092] In this way, the first limiting part 401a and the second limiting part 402a only come into contact when the impact end face 200 is lifted, and they do not touch each other when the first connecting section 401 and the second connecting section 402 move relative to each other. It can be ensured that when the impact end face 200 stays on the fixed end face 100, the contact surface is only affected by the gravity of the impact end face 200 and the second connecting section 402, and the first connecting section 401 and the second connecting section 402 are completely separated, which can ensure that the moving end 301 will not transmit additional acting force to the impact end face 200 through the flexible connection assembly 400.

[0093] Specifically, in actual production, the valve core is generally a cap-shaped structure, that is, the impact end face 200 is not a standard plane, but a conical lower edge with a certain draft angle on its circumferential side, and the fixed end face 100 generally also has a conical upper edge with the same draft angle. Although the valve core is theoretically lifted vertically along the direction of the guide rod when it is actually lifted by air pressure, due to errors in processing accuracy, etc., the valve core has a small distance deviation from the vertical direction during the actual upward movement. When the valve core falls back, the offset distance can be adaptively adjusted between the conical impact end face 200 and the fixed end face 100, that is, in the actual state, the valve core will slide and rub horizontally relative to the valve seat during the process of falling back to the valve seat, which will cause wear. If the flexible connection assembly 400 does not have the ability to deform in the horizontal direction, although it can move up and down vertically, the wear stage in the actual process is missing, which makes the simulation effect worse. Therefore, the flexible connection assembly 400 also needs to provide a certain range of horizontal deformation ability. In this embodiment, the first connecting section 401 and the second connecting section 402 can have a certain adaptive relative displacement ability in the horizontal direction, which can realize the process of the valve core falling back in the actual state.

[0094] The rest of the structure is the same as that of Embodiment 2.

[0095] Embodiment 4

[0096] Referring to Figure 1 and Figure 5 , this is the fourth embodiment of the present invention. Different from the previous embodiment, this embodiment provides another implementation manner of the first connecting section 401 and the second connecting section 402, which can also eliminate the influence brought by the frictional resistance generated when the first connecting section 401 and the second connecting section 402 move relative to each other, and has a certain adaptive displacement ability in the horizontal direction.

[0097] Specifically, both the first connecting section 401 and the second connecting section 402 are connecting pipes nested with each other, and the first limiting part 401a and the second limiting part 402a are both baffles provided at the ends of the connecting pipes.

[0098] Further, an opening 401b is provided at the center of the baffle of the outer connecting pipe. In this embodiment, the nested connecting pipes are coaxial cylindrical shapes, and the opening 401b is circular. The cross-sectional dimension D1 of the connecting pipe located inside in the horizontal direction is smaller than the dimension D2 of the opening 401b, and the cross-sectional dimension D3 of the baffle of the connecting pipe located inside in the horizontal direction is smaller than the inner wall dimension D4 of the outer connecting pipe. In this way, when the first connecting section 401 and the second connecting section 402 move relative to each other in the vertical direction, no friction is generated, and at the same time, it has the ability of adaptive displacement in the horizontal direction.

[0099] Similarly, in this embodiment, the first limiting portion 401a and the second limiting portion 402a have a projection overlapping area S1 with an area greater than 0 in the vertical direction, that is, the dimension D3 is greater than the dimension D2 of the opening 401b, ensuring that the second connecting section 402 can drive the first connecting section 401 to move upward together.

[0100] The remaining structures are the same as those in Embodiment 2.

[0101] Embodiment 5

[0102] Refer to Figure 1 and Figure 6 This is the fifth embodiment of the present invention. Different from the previous embodiment, this embodiment provides a universal joint 404, which realizes that when there is no relative horizontal displacement between the first connecting section 401 and the second connecting section 402, the horizontal wear stage of the spool in the actual use process can still be simulated.

[0103] Specifically, the universal joint 404 is a common part of the prior art. It includes a spherical convex body and a spherical groove body adapted to the size of the convex body. The groove body has an opening with an outer diameter smaller than the size of the convex body. After the convex body is installed in the groove body, it can roll relative to the groove body within a certain angle range. By arranging the convex body and the groove body between the mobile end 301 and the first connecting section 401, and between the impact end face 200 and the second connecting section 402, it can rotate at any angle in the horizontal direction. Combining with the relative movement between the first connecting section 401 and the second connecting section 402, the impact end face 200 can move adaptively relative to the mobile end 301 in the horizontal direction.

[0104] The remaining structures are the same as those in Embodiment 2.

[0105] Embodiment 6

[0106] Refer to Figure 1 and Figure 7 This is the sixth embodiment of the present invention. Different from the previous embodiment, this embodiment provides another implementation manner of the flexible connection assembly 400.

[0107] Specifically, the flexible connection component 400 includes a first connection segment 401 rotatably connected to the mobile end 301 and a second connection segment 402 rotatably connected to the impact end face 200. The first connection segment 401 and the second connection segment 402 are rotatably connected to each other, and the range of the rotation angle C between the first connection segment 401 and the second connection segment 402 is: 0° < C < 180°. As Figure 7 shown, the range of the rotation angle C between the first connection segment 401 and the second connection segment 402 is limited by a limit block. When 0° < C < 180°, after the mobile end 301 moves downward and the impact end face 200 stays on the fixed end face 100, the first connection segment 401 and the second connection segment 402 will rotate relative to each other, and thus the rotation angle C gradually decreases. The distance between the mobile end 301 and the fixed end face 100 in the vertical direction decreases, and thus the downward force of the mobile end 301 cannot be directly transmitted to the impact end face 200 through the flexible connection component 400; when the mobile end 301 moves upward and the rotation angle C gradually increases to the maximum value, the first connection segment 401 will drive the second connection segment 402 to move upward, and driving the second connection segment 402 will drive the impact end face 200 to move upward, which conforms to the actual use state of the gravity type breathing valve.

[0108] The remaining structure is the same as that of Embodiment 1.

[0109] Embodiment 7

[0110] Referring to Figure 1 and Figure 8 This is the seventh embodiment of the present invention. Different from the previous embodiment, this embodiment provides another implementation manner of the flexible connection component 400.

[0111] Specifically, the flexible connection component 400 includes at least one of a rope, a wire, a belt, and a chain. In order to keep the flexible connection component 400 light in weight and have sufficient load-bearing strength, a weak elastic pull rope is preferably used. After the mobile end 301 moves downward and the impact end face 200 stays on the fixed end face 100, the distance between the mobile end 301 and the impact end face 200 shrinks, and the pull rope will become slack. Thus, the downward force of the mobile end 301 cannot be directly transmitted to the impact end face 200 through the flexible connection component 400; when the mobile end 301 moves upward and the pull rope gradually tightens until the tension is greater than the gravity of the impact end face 200, the impact end face 200 is driven to move upward through the pull rope, which conforms to the actual use state of the gravity type breathing valve.

[0112] The remaining structure is the same as that of Embodiment 1.

[0113] Embodiment 8

[0114] Referring to Figure 1 and Figure 9, which is the eighth embodiment of the present invention. Different from the previous embodiment, this embodiment provides a trigger member 500, which can simulate the actual use state of a spring-type breathing valve.

[0115] Specifically, the trigger member 500 is disposed on the upward movement path above the impact end face 200. The trigger member 500 can be installed and fixed together with the fixed end of the driving assembly 300. The specific installation position of the trigger member 500 is such that when the moving end 301 of the driving assembly 300 moves back and forth in the vertical direction, the impact end face 200 is blocked by the trigger member 500 when it follows and moves up to a preset height.

[0116] Furthermore, the trigger member 500 is a first elastic element T1, and the deformation direction of the first elastic element T1 is parallel to the vertical direction. In this embodiment, the first elastic element T1 is a spring, and the installation position of the fixed end of the spring satisfies that after the impact end face 200 moves up to the highest position, the amount of deformation of the spring caused by extrusion and the resulting elastic force match the spring force of the tested spring-type breathing valve.

[0117] Among them, the additional velocity V0 obtained by the impact end face 200 under the action of the elastic force of the first elastic element T1 when moving down in the vertical direction, the velocity V1 of the moving end 301 moving down in the vertical direction, and the free-fall velocity V2 of the impact end face 200 satisfy: V1 > (V0 + V2). When the velocity V1 of the moving end 301 moving down in the vertical direction is greater than the additional velocity V0 obtained by the impact end face 200 under the action of the elastic force of the first elastic element T1 and the free-fall velocity V2 of the impact end face 200, the downward acting force of the moving end 301 will not be directly transmitted to the impact end face 200 through the flexible connection assembly 400, and the impact end face 200 is only affected by its own gravity and the elastic force of the first elastic element T1, which conforms to the actual use state of the spring-type breathing valve.

[0118] The remaining structures are the same as those in Embodiment 1.

[0119] Embodiment 9

[0120] Referring to Figure 1 、 Figure 10 and Figure 11 , which is the ninth embodiment of the present invention. Different from the previous embodiment, this embodiment provides another implementation manner of the trigger member 500, which can achieve that when the moving end 301 turns to move upward, the impact end face 200 will immediately move upward synchronously, and the impact end face 200 can follow the moving end 301 and start to accelerate upward from 0, reducing the impact vibration on the impact end face 200 when the moving end 301 reaches a certain moving speed and then pulls up the impact end face 200.

[0121] Specifically, the trigger 500 is disposed on the upward movement path above the impact end face 200. When the impact end face 200 moves upward to a preset height, it is blocked by the trigger 500 and stops moving upward. In this embodiment, the trigger 500 is integrally made of a rigid material and remains fixed during the process of blocking the impact end face 200.

[0122] Furthermore, the flexible connection assembly 400 further includes a locking member 403 disposed between the first connection segment 401 and the second connection segment 402. The locking member 403 is used to fix the first connection segment 401 and the second connection segment 402 after the mobile end 301 moves downward by a displacement M, that is, when the mobile end 301 moves to the lowest position, the locking member 403 fixes the first connection segment 401 and the second connection segment 402. Then, when the mobile end 301 turns to move upward, the first connection segment 401 and the second connection segment 402 will move upward synchronously, driving the impact end face 200 to move upward synchronously until the impact end face 200 disengages from the fixed end face 100 and moves upward to be blocked by the trigger 500, and the fixed state between the first connection segment 401 and the second connection segment 402 is released to resume relative movement.

[0123] Preferably, the locking member 403 includes a first blocking member 403a and a second blocking member 403b respectively disposed on one of the first connection segment 401 and the second connection segment 402; at least one of the first blocking member 403a and the second blocking member 403b is slidable to adjust the area of the overlapping region S2 of the projections of the first blocking member 403a and the second blocking member 403b in the vertical direction. Since the area of the overlapping region S2 of the projections is adjustable, synchronous movement can only occur when the first blocking member 403a and the second blocking member 403b are in contact with each other and the area of the overlapping region S2 at the contact point remains greater than 0. In this embodiment, when the mobile end 301 moves to the lowest position, the first blocking member 403a or the second blocking member 403b slides to keep the area of the overlapping region S2 greater than 0. Then, when the first connection segment 401 moves upward, it will pull the second connection segment to move upward together; until the impact end face 200 disengages from the fixed end face 100 and moves upward to be blocked by the trigger 500, the first blocking member 403a or the second blocking member 403b slides to make the area of the overlapping region S2 equal to 0, and the first connection segment 401 and the second connection segment 402 resume relative movement.

[0124] In a preferred embodiment, one side of the first blocking member 403a has a groove 403a-1 formed by inward depression. A clamping block 403a-2 is connected in the groove 403a-1 through a second elastic element T2. The external dimension of the clamping block 403a-2 is adapted to the inner wall dimension of the groove 403a-1. In this embodiment, the second elastic element T2 is also a spring. After the clamping block 403a-2 is squeezed to compress the spring and enter the groove 403a-1, the clamping block 403a-2 does not block the clamping groove 403b-1 in the vertical direction. The second blocking member 403b has a clamping groove 403b-1 that cooperates with the clamping block 403a-2.

[0125] During the process of the mobile end 301 moving to the lowest position, although the area of the overlapping region S2 of the vertical projections of the first blocking member 403a and the second blocking member 403b is initially greater than 0, at this time, the two do not contact each other and cannot perform motion transmission. When the first blocking member 403a contacts the second blocking member 403b, since the downward movement direction of the second connecting section 402 is blocked at this time, the second blocking member 403b will squeeze the clamping block 403a-2 into the groove 403a-1 until the clamping block 403a-2 is snapped into the clamping groove 403b-1 under the elastic force of the spring when the mobile end 301 moves to the lowest position. During this process, the area of the overlapping region S2 of the vertical projections of the first blocking member 403a and the second blocking member 403b changes from being greater than 0 to equal to 0, and then remains greater than 0. At this time, the frictional resistance in the vertical direction between the clamping block 403a-2 and the clamping groove 403b-1 is greater than the gravity of the impact end face 200. Therefore, when the first connecting section 401 moves upward, it will pull the second connecting section to move upward together. Until the impact end face 200 breaks away from the fixed end face 100 and moves upward to be blocked by the triggering member 500, the force in the vertical direction between the clamping block 403a-2 and the clamping groove 403b-1 gradually exceeds its frictional resistance until the clamping block 403a-2 slides out of the clamping groove 403b-1, and the relative movement between the first connecting section 401 and the second connecting section 402 resumes.

[0126] In another preferred embodiment, the first connecting section 401 and the second connecting section 402 form a nested structure; the second blocking member 403b is located inside the nested structure, and the second blocking member 403b is provided at the end of the first connecting section 401 or the second connecting section 402. In this way, after the clamping block 403a-2 disengages from the clamping groove 403b-1, the clamping block 403a-2 will not block the outer wall of the inner layer of the nested structure or the inside and outside of the outer layer of the nested structure, eliminating the influence of unnecessary frictional resistance when the first connecting section 401 moves relative to the second connecting section 402.

[0127] The remaining structures are the same as those in Embodiment 8.

[0128] Embodiment 10

[0129] Refer toFigure 1 And Figures 12 - 14 This is the tenth embodiment of the present invention, which provides a breathing valve fatigue test device including a continuous impact mechanism. Among them, the fixed end face 100 is located on the upper end face of the valve seat of the breathing valve, and the impact end face 200 is located on the lower end face of the valve core of the breathing valve. Specifically, the breathing valve fatigue test device further includes a working platform 600 and a fixing component 700. The driving component 300 is installed on the working platform 600. The fixing component 700 is arranged at the bottom of the working platform 600 and is used to fix the valve seat of the breathing valve. In this embodiment, the fixing component 700 includes a number of mounting holes arranged at the bottom of the working platform 600 and a fixture adapted to the valve seat of the breathing valve. The fixture is fixed to the bottom of the working platform 600 through the mounting holes, and the position of the fixture is adjusted through the mounting holes at different positions to adapt to breathing valves of different sizes, and then the valve seat of the breathing valve is clamped and fixed through the fixture.

[0130] Preferably, the fixing component 700 is arranged on the conveying member, which is convenient for installing and fixing the breathing valve outside the working platform 600 through the fixture and then conveying it to the designated position below the working platform 600 through the conveying member. The conveying member can adopt the motor-driven conveying of the existing technology, which is convenient for control.

[0131] Furthermore, the working platform 600 includes a frame 601, a lifting platform 602 arranged inside the frame 601 and movable in the vertical direction, and a positioning platform 603 arranged on one side of the lifting platform 602 and movable in the horizontal direction. In this embodiment, both the lifting platform 602 and the positioning platform 603 are driven by the cooperation of a motor and a screw. The driving component 300 is installed on the positioning platform 603. By controlling the lifting platform 602 to move in the vertical direction, breathing valves of different heights can be adapted, and by controlling the positioning platform 603 to move in the horizontal direction, the driving component 300 can be positioned at the position of the valve core of the breathing valve.

[0132] Preferably, it further includes a stroke protection component to protect the control process and prevent losses caused by collisions between the platform and the frame 601 or the breathing valve. The stroke protection component includes a controller connected to at least one of the lifting platform 602, the positioning platform 603 and the driving component 300, a displacement sensor arranged in the moving direction of the lifting platform 602 or / and the positioning platform 603, and an alarm device installed on one side of the frame 601 and communicating with the displacement sensor. The alarm device is communicatively connected to the controller.

[0133] When the displacement sensor monitors that the displacement distance in the moving direction exceeds the preset value, it sends an alarm instruction to the alarm device. After receiving the alarm instruction, the alarm device issues an alarm and sends an emergency stop instruction to the controller. After receiving the emergency stop instruction, the controller controls the corresponding lifting platform 602, positioning platform 603 or driving component 300 to immediately stop moving or move in the reverse direction to achieve the protection function.

[0134] Taking the lifting platform 602 as an example, the real-time position of the platform is detected by a displacement sensor, and compared with the target value input by the HMI in combination with the current position detected by the displacement sensor. The lifting platform 602 is driven by a motor, so that the lifting platform 602 is moved to the target position. The extreme positions of the displacement sensor are set at the uppermost and lowermost positions of the platform stroke for protection, preventing the mechanism from being damaged due to the lifting platform 602 exceeding the stroke range caused by software or hardware failures.

[0135] The remaining structures are the same as those in Embodiment 1.

[0136] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A continuous impact mechanism, characterized in that: including, a fixed end face (100) that is relatively stationary in the vertical direction; an impact end face (200) that cooperates with the fixed end face (100) and can move directionally along the vertical direction; and, a driving assembly (300) having a mobile end (301) that can move back and forth in the vertical direction, wherein the mobile end (301) is connected to the impact end face (200) through a flexible connection assembly (400), and the flexible connection assembly (400) does not have the ability to recover deformation by itself when the deformation amount is less than L; wherein, for any one-way displacement amount M of the mobile end (301) in the vertical direction, and the maximum displacement amount N of the impact end face (200) relative to the fixed end face (100) in the same one-way always satisfy: M > N, and M - N ≤ L.

2. The continuous impact mechanism according to claim 1, wherein: The flexible connection assembly (400) includes a first connection segment (401) connected to the mobile end (301), and a second connection segment (402) connected to the impact end face (200); The first connection segment (401) moves directionally relative to the second connection segment (402) in the vertical direction, A first limiting portion (401a) is provided on the side of the first connection segment (401) away from the mobile end (301), A second limiting portion (402a) is provided on the side of the second connection segment (402) away from the impact end face (200), The first limiting portion (401a) and the second limiting portion (402a) have a projection overlapping area S1 with an area greater than 0 in the vertical direction.

3. The continuous impact mechanism according to claim 2, wherein: The first limiting portion (401a) and the second limiting portion (402a) form a nested structure; When the first limiting portion (401a) is located in the inner layer of the nested structure, the side surfaces of the first limiting portion (401a) and the second limiting portion (402a) that are close to each other are both conical structures with a smaller upper part and a larger lower part; When the second limiting portion (402a) is located in the inner layer of the nested structure, the side surfaces of the first limiting portion (401a) and the second limiting portion (402a) that are close to each other are both conical structures with a larger upper part and a smaller lower part.

4. The continuous impact mechanism according to claim 2, characterized in that: The first connection segment (401) and the second connection segment (402) are both connecting pipes nested with each other, and the first limiting portion (401a) and the second limiting portion (402a) are both baffles provided at the ends of the connecting pipes; An opening (401b) is provided at the center of the baffle of the outer connecting pipe, The cross-sectional dimension D1 of the inner connecting pipe in the horizontal direction is smaller than the dimension D2 of the opening (401b), The cross-sectional dimension D3 of the baffle of the inner connecting pipe in the horizontal direction is smaller than the inner wall dimension D4 of the outer connecting pipe.

5. The continuous impact mechanism according to claim 2, characterized in that: The mobile end (301) and the first connection segment (401) are connected, or / and the impact end face (200) and the second connection segment (402) are connected through a universal joint (404).

6. The continuous impact mechanism according to claim 1, characterized in that: The flexible connection assembly (400) includes a first connection segment (401) rotatably connected to the mobile end (301), and a second connection segment (402) rotatably connected to the impact end face (200); The first connecting section (401) and the second connecting section (402) are rotatably connected, and the range of the rotation angle C between the first connecting section (401) and the second connecting section (402) is: 0° < C < 180°.

7. The continuous impact mechanism according to claim 1, characterized in that: The flexible connection assembly (400) includes at least one of a rope, a wire, a belt, and a chain.

8. The continuous impact mechanism according to any one of claims 1-7, characterized in that: The speed V1 at which the mobile end (301) moves downward in the vertical direction is greater than the speed V2 at which the impact end face (200) freely falls.

9. The continuous impact mechanism according to any one of claims 1-7, characterized in that: It further includes a trigger member (500) provided on the movement route above the impact end face (200), and the impact end face (200) is blocked by the trigger member (500) when it moves upward to a preset height; The trigger member (500) is a first elastic element T1, and the deformation direction of the first elastic element T1 is parallel to the vertical direction; The additional speed V0 obtained by the impact end face (200) under the action of the elastic force of the first elastic element T1 when moving downward in the vertical direction, the speed V1 at which the mobile end (301) moves downward in the vertical direction, and the speed V2 at which the impact end face (200) freely falls satisfy: V1 > (V0 + V2).

10. The continuous impact mechanism according to any one of claims 2-6, characterized in that: It further includes a trigger member (500) provided on the movement route above the impact end face (200), and the impact end face (200) is blocked by the trigger member (500) and stops moving upward when it moves upward to a preset height; The flexible connection assembly (400) further includes a locking member (403) provided between the first connecting section (401) and the second connecting section (402); The locking member (403) is used to fix the first connecting section (401) and the second connecting section (402) after the mobile end (301) moves downward by a displacement amount M, and to release the fixation between the first connecting section (401) and the second connecting section (402) after the impact end face (200) is blocked by the trigger member (500).

11. The continuous impact mechanism according to claim 10, wherein: The locking member (403) includes a first blocking member (403a) and a second blocking member (403b) respectively provided on one of the first connecting section (401) and the second connecting section (402); At least one of the first blocking member (403a) and the second blocking member (403b) is slidable to adjust the area size of the overlapping region S2 of the projections of the first blocking member (403a) and the second blocking member (403b) in the vertical direction.

12. The continuous impact mechanism according to claim 11, characterized in that: One side of the first blocking member (403a) has a groove (403a-1) formed by inward depression, and a clamping block (403a-2) is connected in the groove (403a-1) through a second elastic element T2, and the outer dimension of the clamping block (403a-2) is adapted to the inner wall dimension of the groove (403a-1); The second blocking member (403b) has a clamping groove (403b-1) that cooperates with the clamping block (403a-2); When the clamping block (403a-2) is engaged in the clamping groove (403b-1), the frictional resistance between the clamping block (403a-2) and the clamping groove (403b-1) in the vertical direction is greater than the gravity of the impact end face (200).

13. The continuous impact mechanism according to claim 12, characterized in that: The first connecting section (401) and the second connecting section (402) form a nested structure; The second blocking member (403b) is located in the inner layer of the nested structure, and the second blocking member (403b) is provided at the end of the first connecting section (401) or the second connecting section (402).

14. A breathing valve fatigue test device, including the continuous impact mechanism described above, characterized in that: The fixed end face (100) is located at the upper end face of the valve seat of the breathing valve, and the impact end face (200) is located at the lower end face of the valve core of the breathing valve; The breathing valve fatigue test device further includes a working platform (600), on which the driving assembly (300) is installed; and a fixing assembly (700), which is provided at the bottom of the working platform (600) and is used to fix the valve seat of the breathing valve.

15. The breathing valve fatigue test device according to claim 14, wherein: The working platform (600) includes a frame (601), a lifting platform (602) arranged in the frame (601) and movable in the vertical direction, and a positioning platform (603) arranged on one side of the lifting platform (602) and movable in the horizontal direction; The driving assembly (300) is installed on the positioning platform (603).

16. The breathing valve fatigue test device according to claim 14 or 15, characterized in that: It further includes a stroke protection assembly The stroke protection assembly includes a controller connected to at least one of the lifting platform (602), the positioning platform (603) and the driving assembly (300), a displacement sensor arranged in the moving direction of the lifting platform (602) or / and the positioning platform (603), and an alarm device installed on one side of the frame (601) and in communication connection with the displacement sensor. The alarm device is in communication connection with the controller; When the displacement sensor monitors that the displacement distance in the moving direction exceeds a preset value, it sends an alarm instruction to the alarm device, After receiving the alarm instruction, the alarm device issues an alarm and sends an emergency stop instruction to the controller, After receiving the emergency stop instruction, the controller controls the corresponding lifting platform (602), positioning platform (603) or driving assembly (300) to immediately stop moving or move in the reverse direction.

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