Pneumatic multi-stage linkage high-voltage relay

Abstract

The invention relates to a pneumatic multi-stage linkage high-voltage relay. The relay comprises a support; the branch control unit is arranged on the support and comprises a plurality of first contact groups, and each first contact group comprises a first moving contact and two first fixed contacts; the first driving mechanism comprises an air cylinder and a first driving part, the multiple first moving contacts of the sub-control unit are connected with the first driving part, the first driving part is movably connected to the support, the air cylinder is connected with the first driving part through a transmission structure to drive the first driving part to move, and the first moving contacts move along with the first driving part; the first moving contacts can move to be in contact with or separated from the two corresponding first fixed contacts, and the plurality of first moving contacts are in synchronous contact with or separated from the corresponding first fixed contacts. Linkage control of a plurality of contact groups is realized by adopting a mode of matching cylinder driving with mechanical linkage, the influence of a high-voltage circuit is isolated, higher reliability is realized, and relatively high mechanical synchronization of a plurality of pairs of contacts in the opening and closing process is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of relays, and in particular to a pneumatic multi-stage linkage high-voltage relay. BACKGROUND

[0002] Under the dual impetus of the current national economic transformation and upgrading and the technology self-controllable strategy, the related fields such as semiconductor high-end equipment manufacturing, electromagnetic emission system, and fusion device system are accelerating the process of replacing core components with domestic products. The breakthrough of domestic high-performance pneumatic relays will provide important support for the self-controllable of high-end manufacturing fields and emerging industries, and help to realize the domestic substitution of technology.

[0003] At present, the mainstream scheme to realize the switching action of multi-contact linkage is the electromagnetic drive type technical route. When the electromagnetic iron is powered or loses power, it drives the moving part to move linearly or rotate, thereby realizing the synchronous opening and closing of all contacts. However, the electromagnetic drive scheme is susceptible to the reliability of the strong electromagnetic environment of the high-voltage relay, and it is difficult to meet the high-performance requirements of the relay in the high-end equipment manufacturing field. SUMMARY

[0004] Based on the above description, the present application provides a pneumatic multi-stage linkage high-voltage relay to solve the problem that the electromagnetic drive scheme is susceptible to the reliability of the strong electromagnetic environment of the high-voltage relay, and it is difficult to meet the high-performance requirements of the relay in the high-end equipment manufacturing field.

[0005] The technical solution of the present application to solve the above technical problems is as follows: The present application provides a pneumatic multi-stage linkage high-voltage relay, comprising: a support; a sub-control unit arranged on the support, the sub-control unit comprising a plurality of first contact groups, each first contact group comprising a first moving contact and two first fixed contacts; a first driving mechanism comprising a gas cylinder and a first driving member, the plurality of first moving contacts of the sub-control unit being connected to the first driving member, the first driving member being movably connected to the support, the gas cylinder being connected to the first driving member through a transmission structure to drive the first driving member to move, the first moving contact moving with the first driving member, the first moving contact being movable to contact or separate from the corresponding two first fixed contacts, and the plurality of first moving contacts and the corresponding first fixed contacts being synchronously contacted or separated.

[0006] Preferably, the relay further comprises a main control unit, the main control unit comprising a plurality of second contact groups, each second contact group comprising a second moving contact and two second fixed contacts. A second driving mechanism comprising a manipulating member and a second driving member, the second moving contacts of the master control unit are connected with the second driving member, the second driving member is movably connected with the support, the manipulating member is connected with the second driving member, the manipulating member is movably connected with the support and drives the second driving member to move when moving, the second moving contacts move with the second driving member, the second moving contacts can be moved to contact or separate from the corresponding two second fixed contacts, and the second moving contacts and the corresponding second fixed contacts are synchronously contacted or separated. The first contact group and the second fixed contact group are one-to-one corresponding, the second contact group is used for connecting with the corresponding first contact group, and the power supply to the first contact group is controlled by the on-off of the two second fixed contacts of the second contact group.

[0007] Preferably, a locking structure is arranged between the manipulating member and the cylinder. The cylinder comprises a first state and a second state, the first moving contacts contact the corresponding first fixed contacts when the cylinder is in the first state, and the first moving contacts separate from the corresponding first fixed contacts when the cylinder is in the second state. The manipulating member comprises a first position for separating the second moving contacts from the corresponding second fixed contacts. When the manipulating member is in the first position and the cylinder is in the second state, the locking structure limits the movement of the manipulating member to contact the second moving contacts with the corresponding second fixed contacts, and when the manipulating member is in the first position and the cylinder is in the first state, the locking structure releases the limitation.

[0008] Preferably, the locking structure comprises a locking rod connected with the piston rod of the cylinder and moves with the piston rod, the manipulating member is provided with a lock hole for inserting the locking rod, when the manipulating member is in the first position, the locking rod can be inserted into the lock hole or separated from the lock hole when the piston rod of the cylinder moves, and when the cylinder is in the second state, the locking rod is inserted into the lock hole to limit the movement of the manipulating member to contact the second moving contacts with the corresponding second fixed contacts.

[0009] Preferably, a first elastic member is arranged between the manipulating member and the support, and the manipulating member is kept in a second position for contacting the second moving contacts with the corresponding second fixed contacts by the elastic force of the first elastic member.

[0010] Preferably, the first movable contact can move relative to the first driving member, and a second elastic member is provided between the first movable contact and the first driving member. When the first movable contact moves with the first driving member close to the corresponding first fixed contact and comes into contact with the first fixed contact, the first movable contact is prevented by the first fixed contact from continuing to move with the first driving member in that direction, and the first driving member can overcome the elastic force of the second elastic member and continue to move in that direction.

[0011] Preferably, there are multiple sub-control units and multiple first driving components, and all of the multiple first driving components are connected to the cylinder through a transmission structure. The sub-control units and the first driving components correspond one-to-one, and the multiple first moving contacts of the sub-control units are connected to the corresponding first driving components.

[0012] Preferably, the plurality of first contact groups are spaced apart along a first direction, and the two first fixed contacts of each first contact group are spaced apart along a second direction perpendicular to the first direction. The first driving member can move along the first direction and drive the first moving contact to move along the first direction, so that the first moving contact contacts or separates from the corresponding two first fixed contacts.

[0013] Preferably, the transmission structure is a linkage structure.

[0014] Compared with the prior art, the technical solution of this application has at least the following beneficial technical effects: This invention employs a cylinder-driven, mechanically linked system to achieve coordinated control of multiple contact groups, eliminating the reliability issues associated with electromagnetic drives in high-voltage, high-electromagnetic environments. The cylinder, first driving component, and transmission structure utilize a purely mechanical design, isolating them from the influence of high-voltage circuits and resulting in higher reliability. The transmission structure simultaneously transmits the linear thrust of the cylinder to all first moving contacts, ensuring high mechanical synchronization of multiple contact pairs during opening and closing. Therefore, the high-voltage relay of this application achieves improved synchronization accuracy, environmental adaptability, and long-term reliability, meeting the high-performance and diverse requirements of high-end equipment manufacturing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a pneumatic multi-stage linkage high-voltage relay provided in an embodiment of the present invention; Figure 2 A top view schematic diagram of a pneumatic multi-stage linkage high-voltage relay provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the sub-control unit and the first driving component in the pneumatic multi-stage linkage high-voltage relay provided in an embodiment of the present invention; Figure 4This is a schematic diagram of the first driving component and transmission structure in a pneumatic multi-stage linkage high-voltage relay provided in an embodiment of the present invention. Figure 5 This is a schematic diagram of the main control unit and locking structure in the pneumatic multi-stage linkage high-voltage relay provided in an embodiment of the present invention; Figure 6 This is a schematic diagram illustrating the cooperation between the locking structure and the operating element in the pneumatic multi-stage linkage high-voltage relay provided in an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Bracket; 11. Mounting plate; 12. Limiting plate; 2. Sub-control unit; 21. First moving contact; 22. First fixed contact; 3. Cylinder; 31. Transmission rod; 32. Support plate; 4. First driving component; 5. Transmission structure; 51. First connecting rod; 52. Second connecting rod; 53. Third connecting rod; 6. Connecting block; 7. Fourth connecting rod; 8. Second elastic element; 9. Third elastic element; 10. Main control unit; 101. Second moving contact; 102. Second fixed contact; 20. Operating component; 201. Locking hole; 202. Stop block; 30. Second driving component; 40. Locking rod; 50. Fourth elastic element; 60. First elastic element; 70. Base plate. Detailed Implementation

[0017] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0019] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0020] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0021] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0022] Reference Figure 1 As shown, this application provides a pneumatic multi-stage linkage high-voltage relay, which includes a bracket 1, a sub-control unit 2, and a first drive mechanism.

[0023] Reference Figure 1 As shown, bracket 1 is mounted on a base plate 70, providing a mounting foundation and support for each component. Bracket 1 must be made of insulating material to meet insulation requirements.

[0024] Reference Figure 1 As shown, the sub-control unit 2 is mounted on the bracket 1 and includes multiple first contact groups. Each first contact group includes one first moving contact 21 and two first fixed contacts 22. The two first fixed contacts 22 are respectively connected to the power supply and the electrical equipment. When the first moving contact 21 and the corresponding two first fixed contacts 22 are in contact, a conductive circuit is formed, thereby supplying power to the electrical equipment. Conversely, when the first moving contact 21 and the corresponding two first fixed contacts 22 are separated, the formed circuit is broken, and the electrical equipment does not work.

[0025] Reference Figure 1 and Figure 2 As shown, the first driving mechanism includes a cylinder 3 and a first driving member 4. Multiple first moving contacts 21 of the sub-control unit 2 are connected to the first driving member 4. The first driving member 4 is movably connected to the bracket 1. The cylinder 3 is connected to the first driving member 4 through the transmission structure 5 to drive the first driving member 4 to move. The first moving contacts 21 move with the first driving member 4. The first moving contacts 21 can move to contact or separate from the corresponding two first fixed contacts 22, and multiple first moving contacts 21 and corresponding first fixed contacts 22 can contact or separate synchronously.

[0026] The system employs a combination of cylinder 3 and mechanical linkage to achieve coordinated control of multiple contact groups, eliminating reliability issues associated with electromagnetic drives in high-voltage, high-electromagnetic environments. Cylinder 3, the first driving component 4, and the transmission structure 5 utilize a purely mechanical structure, isolating them from the influence of high-voltage circuits and resulting in higher reliability.

[0027] The linear thrust of cylinder 3 is simultaneously transmitted to all first moving contacts 21 via transmission structure 5, ensuring high mechanical synchronization of multiple pairs of contacts during opening and closing. This high-voltage relay achieves improved synchronization accuracy, environmental adaptability, and long-term reliability, meeting the high-performance and diverse requirements of high-end equipment manufacturing. Reference Figure 1 and Figure 3 As shown, multiple first contact groups are spaced apart along a first direction, and two first fixed contacts 22 of each first contact group are spaced apart along a second direction perpendicular to the first direction. The first driving member 4 can move along the first direction and drive the first moving contact 21 to move along the first direction so that the first moving contact 21 contacts or separates from the corresponding two first fixed contacts 22.

[0028] In this embodiment, the first direction is perpendicular to the surface of the base plate 70, and the second direction is parallel to the surface of the base plate 70. The first moving contact 21 and the first fixed contact 22 are distributed in the first direction, and the length of the first moving contact 21 is required to allow it to contact both first fixed contacts 22 simultaneously. When the first driving member 4 moves away from the base plate 70, the first moving contact 21 moves away from the corresponding first fixed contact 22; when the first driving member 4 moves closer to the base plate 70, the first moving contact 21 moves closer to the corresponding first fixed contact 22.

[0029] Reference Figure 3As shown, the first moving contact 21 is further configured to be movable relative to the first driving member 4, and a second elastic member 8 is provided between the first moving contact 21 and the first driving member 4. When the first moving contact 21 moves with the first driving member 4 close to the corresponding first fixed contact 22 and comes into contact with the first fixed contact 22, the first moving contact 21 is prevented by the first fixed contact 22 from continuing to move with the first driving member 4 in that direction, and the first driving member 4 can overcome the elastic force of the second elastic member 8 and continue to move in that direction.

[0030] With this setting, when the first moving contact 21 moves close to the corresponding first fixed contact 22 and comes into contact with the first fixed contact 22 as the first driving member 4 moves, the first driving member 4 can overcome the elastic force of the second elastic member 8 and continue to move in that direction. Thus, the elastic force of the second elastic member 8 keeps the first moving contact 21 in stable contact with the first fixed contact 22, ensuring the reliability of circuit conduction.

[0031] Reference Figure 3 As shown, specifically, the first driving component 4 is a first driving rod, which includes multiple connecting segments with non-circular cross-sections. These connecting segments are spaced apart along the axial direction of the first driving rod, while the non-connecting segments of the first driving rod have circular cross-sections. The number of connecting segments is the same as the number of first moving contacts 21 connected to the first driving rod. The first moving contacts 21 are fitted one-to-one onto the connecting segments and can slide along the axial direction of the first driving rod. This allows for the installation of multiple connecting segments on the first driving rod.

[0032] Reference Figure 3 As shown, in this embodiment, the second elastic element 8 is a spring, which is sleeved outside the corresponding connecting section. The two ends of the spring abut against the first moving contact 21 and the non-connecting section of the first driving rod, respectively. When the first moving contact 21 separates from the first fixed contact 22, it abuts against the non-connecting section of the first driving rod under the elastic force of the second elastic element 8. When the first driving rod moves, it drives the first moving contact 21 to move.

[0033] Reference Figure 1 and Figure 3 As shown, to achieve stable mounting of the first drive rod on the bracket 1, the bracket 1 includes two mounting plates 11, which are spaced apart along a first direction. Guide holes are formed on the mounting plates 11 for the first drive rod to pass through. The first drive rod passes through the two mounting plates 11, and the diameter of the mounting holes is larger than the diameter of the first drive rod, allowing the first drive rod a certain amount of movement space in a direction perpendicular to the first direction. The two mounting plates 11 keep the first drive rod in a state where its axis is approximately parallel to the first direction, and allow it to move along the first direction.

[0034] Reference Figure 3As shown, a connecting block 6 is connected to one end of the first drive rod near the base plate 70, and the connecting block 6 is connected to the connecting structure. A third elastic element 9 is provided between the connecting block 6 and the mounting plate 11 near the base plate 70. When the first drive rod moves away from the base plate 70 in the first direction, the third elastic element 9 undergoes elastic deformation.

[0035] Reference Figure 3 As shown, specifically, the third elastic element 9 is also a spring. This spring is sleeved outside the first drive rod, and its two ends abut against the mounting plate 11 and the connecting block 6 respectively. When the first moving contact 21 and the first fixed contact 22 are separated during the design, the third elastic element 9 is in a compressed state so that when the first drive mechanism fails, the first drive rod can be kept in a state where the first moving contact 21 is in contact with the first fixed contact 22 under the elastic force of the third elastic element 9.

[0036] Reference Figure 2 As shown, specifically, cylinder 3 is configured such that its axis is approximately parallel to a third direction in a plane perpendicular to the second direction, and the third direction is a direction perpendicular to both the first and second directions. The body of cylinder 3 is rotatably connected to bracket 1, and the piston rod is parallel to the second direction.

[0037] Reference Figure 2 and Figure 4 As shown, in this embodiment, the transmission structure 5 adopts a linkage structure. The linkage mechanism includes a first linkage 51, a second linkage 52, and a third linkage 53. The first linkage 51 and the second linkage 52 are both located between the first drive rod and the base plate 70 in the first direction. One end of the first linkage 51 is hinged to the base plate 70, and the other end is simultaneously hinged to one end of the second linkage 52 and the piston rod of the cylinder 3. Specifically, a transmission rod 31 is connected to the piston rod of the cylinder 3 and is hinged to the first linkage 51 and the second linkage 52. The other end of the second linkage 52 is simultaneously hinged to the connecting block 6 and one end of the third linkage 53, and the other end of the third linkage 53 is hinged to the bracket 1. All the above hinge axes are parallel to the second direction. In order to improve the operational stability of the first drive rod, the linkage structure composed of the first linkage 51, the second linkage 52, and the third linkage 53 is provided in two sets and distributed at intervals along the second direction.

[0038] With the above configuration, when cylinder 3 actuates, it drives the first connecting rod 51 and the second connecting rod 52 to rotate synchronously. The second connecting rod 52 drives the first driving rod to move along the first direction. Due to the large clearance fit between the first driving rod and the mounting hole on the mounting plate 11, the first driving rod can move or rotate relative to the mounting plate 11 in the third direction, meaning that the third connecting rod 53 will not cause the structure to jam. Under the limitation of the connecting rod structure, the first driving rod will not move or rotate relative to the mounting plate 11 in the second direction, ensuring that the first moving contact 21 maintains contact with both first fixed contacts 22 simultaneously. The first driving rod has a large range of motion, making it less prone to jamming and ensuring the reliability and stability of long-term operation.

[0039] Reference Figure 1 and Figure 5 As shown, furthermore, in order to complete the de-energizing action of each contact group in the event of a failure of the first drive mechanism, a main control unit 10 and a second drive mechanism are provided. The main control unit 10 includes multiple second contact groups, each second contact group including a second moving contact 101 and two second fixed contacts 102. The first contact group and the second fixed contact group 102 correspond one-to-one, and the second contact group is used to connect with the corresponding first contact group, suitable for controlling the power supply to the first contact group by opening and closing the two second fixed contacts 102 of the second contact group.

[0040] Each second contact group acts as a master switch corresponding to the first contact group. By controlling the connection or disconnection of two second fixed contacts 102 in the first contact group, it achieves the purpose of supplying or de-energizing the first contact group. In the event of a failure in the first drive mechanism, the power supply to the first contact group can be cut off by disconnecting the two second fixed contacts 102, thereby protecting the electrical equipment.

[0041] The second driving mechanism is used to drive the multiple second moving contacts 101 of the main control unit 10 to move synchronously. The second driving mechanism includes a control member 20 and a second driving member 30. The multiple second moving contacts 101 of the main control unit 10 are connected to the second driving member 30. The second driving member 30 is movably connected to the bracket 1. The control member 20 is connected to the second driving member 30. The control member 20 is movably connected to the bracket 1 and drives the second driving member 30 to move when it moves. The second moving contacts 101 move with the second driving member 30. The second moving contacts 101 can move to contact or separate from the corresponding two second fixed contacts 102, and the multiple second moving contacts 101 contact or separate from the corresponding second fixed contacts 102 synchronously.

[0042] Reference Figure 1 and Figure 5As shown, in this embodiment, the main control unit 10 and the sub-control unit 2 are spaced apart in the third direction. The main control unit 10 and the sub-control unit 2 adopt the same structure. The second driving member 30 adopts the same structure as the first driving rod. The connection method between the second moving contact 101 and the second driving member 30 is the same as the connection method between the first moving contact 21 and the first driving member 4, and a second elastic member 8 is also provided between them. The operating member 20 is a control rod with its axis parallel to the first direction, and its movement direction is parallel to the first direction. That is, the movement of the operating member 20 drives the second driving member 30 to move along the first direction.

[0043] Specifically, the control lever is mounted on the base plate 70 and is fixedly connected to the second drive component 30 via a connecting rod.

[0044] Reference Figure 5 and Figure 6 As shown, a locking structure is further provided between the operating member 20 and the cylinder 3. The cylinder 3 is configured to include a first state and a second state. In the first state, the first moving contact 21 is in contact with the corresponding first fixed contact 22. In the second state, the first moving contact 21 is separated from the corresponding first fixed contact 22. The operating member 20 includes a first position that separates the second moving contact 101 from the corresponding second fixed contact 102.

[0045] When the operating member 20 is in the first position and the cylinder 3 is in the second state, the locking structure restricts the operating member 20 from moving to the point where the second moving contact 101 contacts the corresponding second fixed contact 102. When the operating member 20 is in the first position and the cylinder 3 is in the first state, the locking structure releases the restriction.

[0046] With the above configuration, when cylinder 3 is in the first state, the first moving contact 21 contacts the corresponding first fixed contact 22, forming a circuit between the two first fixed contacts 22. At this time, the operating member 20 can be controlled to move, causing the two second fixed contacts 102 to disconnect, thus protecting the electrical equipment. When the operating member 20 is in the first position and cylinder 3 is in the second state, the first moving contact 21 separates from the corresponding first fixed contact 22, and the second moving contact 101 separates from the corresponding second fixed contact 102. The operating member 20 is restricted from movement by the locking member, preventing the two second fixed contacts 102 from forming a circuit. This prevents accidental power-on and protects personnel and equipment safety.

[0047] Reference Figure 5 and Figure 6As shown, the locking structure includes a locking rod 40, which is connected to the piston rod of the cylinder 3 and moves with the piston rod. The operating member 20 is provided with a locking hole 201 for the locking rod 40 to be inserted. When the operating member 20 is in the first position, the locking rod 40 can be inserted into or disengaged from the locking hole 201 as it moves with the piston rod of the cylinder 3. When the cylinder 3 is in the second state, the locking rod 40 is inserted into the locking hole 201 to restrict the movement of the operating member 20 to the point that the second moving contact 101 contacts the corresponding second fixed contact 102.

[0048] In this embodiment, the lock hole 201 is located on the side of the control lever near the sub-control unit 2. The axis of the locking rod 40 is approximately parallel to the third direction. One end of the locking rod 40 is connected to the piston rod of the cylinder 3, and the other end extends through the guide hole provided on the side plate of the bracket 1 to the vicinity of the control lever.

[0049] Reference Figure 5 As shown, specifically, a support plate 32 is connected to the piston rod of cylinder 3. One end of the locking rod 40 passes through a hole in the support plate 32 and is connected to a limit block. A fourth elastic element 50 is provided between the locking rod 40 and the support plate 32. The fourth elastic element 50 is a spring and is located between the support plate 32 and the operating lever. The spring is sleeved on the outside of the locking rod 40, and both ends of the spring abut against the stepped surfaces on the support plate 32 and the locking rod 40, respectively, so that the locking rod 40 can move axially relative to the support plate 32 and the piston rod of cylinder 3. When cylinder 3 is running in the second state, the locking rod 40 moves closer to the operating lever. If it abuts against the operating lever, it can move relative to the piston rod of cylinder 3 and compress the spring. Then, during the movement of the operating lever to the second position, the spring keeps the locking rod 40 abutting against the operating lever until the operating lever moves to the lock hole 201 and the locking rod 40 are aligned. The locking rod 40 is inserted into the lock hole 201 under the spring force to complete the locking action.

[0050] Reference Figure 5 and Figure 6 As shown, the main control unit 10, as an emergency control unit, needs to remain in a normally closed state during normal operation. Therefore, a first elastic element 60 is provided between the operating member 20 and the bracket 1, which is suitable for holding the operating member 20 in a second position where the second moving contact 101 contacts the corresponding second fixed contact 102 through the elastic force of the first elastic element 60.

[0051] Reference Figure 5 and Figure 6As shown, specifically, the bracket 1 also includes a limiting plate 12, which is arranged parallel to the first direction. The operating lever passes through the limiting plate 12 and can move relative to the limiting plate 12. The first elastic element 60 is a spring and is sleeved on the outside of the operating lever. A stop block 202 is provided outside the operating lever. The stop block 202 is located between the base plate 70 and the limiting plate 12. The spring of the first elastic element 60 is located between the stop block 202 and the limiting plate 12, and its two ends abut against the stop block 202 and the limiting plate 12 respectively. Correspondingly, when the operating member 20 is in the first position, the distance between the stop block 202 and the base plate 70 is relatively far. When the operating member 20 is in the second position, the distance between the stop block 202 and the base plate 70 is relatively close. When the stop block 202 moves from the second position to the first position, the spring needs to be compressed. When the operating member 20 is not operated and is not locked with the locking rod 40, the elastic force of the first elastic member 60 keeps the operating member 20 in the second position, so that the multiple second contact groups of the main control unit 10 remain in the conducting state.

[0052] Reference Figure 1 As shown, in this embodiment, there are multiple sub-control units 2 and multiple first driving components 4. All the multiple first driving components 4 are connected to the cylinder 3 via a transmission structure 5. Each sub-control unit 2 and each first driving component 4 corresponds to one other. Multiple first moving contacts 21 of each sub-control unit 2 are connected to their corresponding first driving components 4. The number of main control units 10 is designed according to load requirements. If the number of sub-control units 2 is too large, resulting in insufficient load capacity of a single main control unit 10, additional main control units 10 can be added to connect the multiple sub-control units 2 to different main control units 10. This embodiment uses four sub-control units 2 and two main control units 10 as an example, where two sub-control units 2 are controlled by one main control unit 10, and the other two sub-control units 2 are controlled by another main control unit 10. The specific wiring method can be configured as needed by those skilled in the art and is a conventional technique, which will not be elaborated here.

[0053] Among them, reference Figure 1 and Figure 4 As shown, among the four sub-control units 2, two form a group, and the two linkage structures corresponding to the two sub-control units 2 in a group are connected by a fourth linkage 7 to achieve synchronous operation. The two second drive components 30 corresponding to the two main control units 10 are connected to a joystick, so that the movement of the two drive components can be synchronously controlled by a joystick to achieve synchronous operation of the two main control units 10.

[0054] Furthermore, a position sensor can be set to detect the position of the joystick. Specifically, two microswitches can be set to detect the first and second positions of the joystick. The specific arrangement of the sensor is a conventional technical method, which will not be described in detail here.

[0055] Shock-absorbing pads can be added between components that may collide to reduce impact and noise during operation.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pneumatic multi-stage linkage high-voltage relay, characterized in that, include: Scaffold (1); The sub-control unit (2) is mounted on the bracket (1). The sub-control unit (2) includes a plurality of first contact groups. The first contact group includes a first moving contact (21) and two first fixed contacts (22). The first driving mechanism includes a cylinder (3) and a first driving member (4). Multiple first moving contacts (21) of the sub-control unit (2) are connected to the first driving member (4). The first driving member (4) is movably connected to the bracket (1). The cylinder (3) is connected to the first driving member (4) through a transmission structure (5) to drive the first driving member (4) to move. The first moving contact (21) moves with the first driving member (4). The first moving contact (21) can move to contact or separate from the corresponding two first fixed contacts (22), and multiple first moving contacts (21) and corresponding first fixed contacts (22) contact or separate synchronously.

2. The pneumatic multi-stage linkage high-voltage relay according to claim 1, characterized in that: It also includes a main control unit (10), which includes multiple second contact groups, each of which includes a second moving contact (101) and two second fixed contacts (102). The second driving mechanism includes an operating element (20) and a second driving element (30). Multiple second moving contacts (101) of the main control unit (10) are connected to the second driving element (30). The second driving element (30) is movably connected to the bracket (1). The operating element (20) is connected to the second driving element (30). The operating element (20) is movably connected to the bracket (1) and drives the second driving element (30) to move when it moves. The second moving contact (101) moves with the second driving element (30). The second moving contact (101) can move to contact or separate from the corresponding two second fixed contacts (102). Multiple second moving contacts (101) and corresponding second fixed contacts (102) contact or separate synchronously. The first contact group corresponds one-to-one with the second fixed contact (102) group. The second contact group is used to connect with the corresponding first contact group and is adapted to control the power supply to the first contact group by switching on and off the two second fixed contacts (102) of the second contact group.

3. The pneumatic multi-stage linkage high-voltage relay according to claim 2, characterized in that: A locking structure is provided between the operating element (20) and the cylinder (3); The cylinder (3) includes a first state and a second state. In the first state, the first moving contact (21) is in contact with the corresponding first fixed contact (22). In the second state, the first moving contact (21) is separated from the corresponding first fixed contact (22). The operating element (20) includes a first position that separates the second moving contact (101) from the corresponding second fixed contact (102); When the actuating element (20) is in the first position and the cylinder (3) is in the second state, the locking structure restricts the actuating element (20) from moving to contact the second moving contact (101) with the corresponding second fixed contact (102). When the actuating element (20) is in the first position and the cylinder (3) is in the first state, the locking structure releases the restriction.

4. The pneumatic multi-stage linkage high-voltage relay according to claim 3, characterized in that: The locking structure includes a locking rod (40), which is connected to the piston rod of the cylinder (3) and moves with the piston rod. The operating member (20) is provided with a locking hole (201) for the locking rod (40) to be inserted. When the operating member (20) is in the first position, the locking rod (40) can be inserted into or disengaged from the locking hole (201) when it moves with the piston rod of the cylinder (3). When the cylinder (3) is in the second state, the locking rod (40) is inserted into the locking hole (201) to restrict the operating member (20) from moving to the point that the second moving contact (101) contacts the corresponding second fixed contact (102).

5. The pneumatic multi-stage linkage high-voltage relay according to claim 3, characterized in that: A first elastic element (60) is provided between the operating element (20) and the bracket (1), which is adapted to keep the operating element (20) in a second position where the second moving contact (101) contacts the corresponding second fixed contact (102) by the elastic force of the first elastic element (60).

6. The pneumatic multi-stage linkage high-voltage relay according to claim 1, characterized in that: The first moving contact (21) is movable relative to the first driving member (4), and a second elastic member (8) is provided between the first moving contact (21) and the first driving member (4). When the first moving contact (21) moves close to the corresponding first fixed contact (22) with the first driving member (4) and comes into contact with the first fixed contact (22), the first moving contact (21) is prevented by the first fixed contact (22) from continuing to move with the first driving member (4) in that direction, and the first driving member (4) can overcome the elastic force of the second elastic member (8) and continue to move in that direction.

7. The pneumatic multi-stage linkage high-voltage relay according to claim 1, characterized in that: The sub-control unit (2) is provided in multiple ways, and the first drive member (4) is provided in multiple ways. All the first drive members (4) are connected to the cylinder (3) through the transmission structure (5). The sub-control unit (2) and the first drive member (4) correspond one-to-one. The multiple first moving contacts (21) of the sub-control unit (2) are connected to the corresponding first drive member (4).

8. The pneumatic multi-stage linkage high-voltage relay according to claim 1, characterized in that: Multiple first contact groups are spaced apart along a first direction, and two first fixed contacts (22) of each first contact group are spaced apart along a second direction perpendicular to the first direction. The first driving member (4) can move along the first direction and drive the first moving contact (21) to move along the first direction so that the first moving contact (21) contacts or separates from the corresponding two first fixed contacts (22).

9. The pneumatic multi-stage linkage high-voltage relay according to claim 1, characterized in that: The transmission structure (5) is a connecting rod structure.

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