Double-isolation high-voltage cabinet transmission device

Abstract

The application discloses a double-isolation high-voltage cabinet transmission device, which is characterized by comprising two first elastic members, two first locking pieces and a second locking piece. Initially, the vacuum circuit breaker switch is in a closed state, the edge of the second locking piece is in abutment with the edges of the two first locking pieces for limiting, the two first locking pieces cannot move forward, and the first operation handle cannot be sleeved into the ends of the first and second transmission members for rotation control. When maintenance is needed, the vacuum circuit breaker switch is opened. Since the second locking piece is connected with the vacuum circuit breaker switch, the first and second empty avoidance positions can be simultaneously driven to move to positions corresponding to the two first locking pieces. The first operation handle is inserted into the through hole to push the two first locking pieces to move forward through the first and second empty avoidance positions. The first operation handle can be sleeved into the ends of the first and second transmission members for control. The whole process only needs to move the second locking piece up and down to realize locking control, and the control is accurate and rapid in response.

Description

Technical Field

[0001] This invention belongs to the field of high-voltage switchgear technology, and particularly relates to a double-isolation high-voltage switchgear transmission device. Background Technology

[0002] To ensure the safe operation of the power system, the switching elements of the high-voltage switchgear, which control the opening and closing of transmission lines, must be able to interrupt rated current, break and close short-circuit current, and open and close various no-load and load circuits. They also need to meet the isolation protection requirements of various maintenance scenarios. Specifically, the high-voltage switchgear is equipped with a vacuum circuit breaker, an upper GN30 disconnector, and a lower GN30 disconnector. During various maintenance scenarios, it is necessary to prevent the vacuum circuit breaker from opening simultaneously with the upper and lower GN30 disconnectors, which could cause a short circuit and safety accident. To accomplish these tasks, the high-voltage switchgear must adopt the power industry's five-prevention interlocking device. Specifically, controlling the five-prevention interlocking device requires the assistance of a double-isolation high-voltage switchgear transmission device. Specifically, most of the existing double-isolation high-voltage switchgear transmission devices on the market use a large number of welded crank arms and connecting rods. Due to the dimensional errors in welding and the tolerance of assembly gaps, the entire product is complicated and unstable during the assembly and debugging process, which cannot guarantee the safe and stable operation of the power system. In addition, the product has poor versatility. Each product can only be adapted to one specification of high-voltage switchgear and cannot be directly interchanged with other switchgear in the same batch, resulting in poor versatility. Summary of the Invention

[0003] (a) Purpose of the invention To overcome the above shortcomings, the present invention aims to provide a double-isolation high-voltage switchgear drive device to solve the technical problems of existing double-isolation high-voltage switchgear drive devices having complex structures, unstable operation, inability to guarantee the safe and stable operation of power systems, and poor versatility.

[0004] (II) Technical Solution To achieve the above objectives, the technical solution provided in this application is as follows: A double-isolation high-voltage switchgear transmission device includes: a housing with two first through holes; a first transmission member and a second transmission member rotatably mounted on the housing and respectively corresponding to one of the first through holes; one end of the first transmission member and the second transmission member being connected to an upper isolating switch and a lower isolating switch, respectively; and the shape of the other end matching the shape of a first operating handle connecting to a vacuum circuit breaker switch inside the high-voltage switchgear; and a locking mechanism including: two first elastic members respectively sleeved on the other end of the first transmission member and the second transmission member; two first locking plates respectively sleeved on the other end of the first transmission member and the second transmission member and located behind the two first elastic members; and a second locking plate movably mounted on one side of the two first locking plates and having first and second clearance positions respectively on its edge. When the edge of the second locking plate abuts against the edges of the two first locking plates, it can prevent the two first locking plates from moving forward, thus locking the mechanism into a locked state; or when the first and second clearance positions move to positions corresponding to the two first locking plates, the first and second locking plates can pass through and move forward to enter an unlocked state. This application employs two first elastic elements, two first locking plates, and a second locking plate. The second locking plate has first and second clearance positions and can move vertically. The second locking plate is connected to an external vacuum circuit breaker switch. Initially, the vacuum circuit breaker switch is in the closed state. The edge of the second locking plate abuts against the edges of the two first locking plates for limitation, preventing the two first locking plates from moving forward. The first operating handle cannot be inserted through the first through hole to rotate the first and second transmission components. When maintenance is required, the vacuum circuit breaker switch is opened by operating the second locking plate. Because the second locking plate is connected to the vacuum circuit breaker switch, at this time... When the first and second clearance positions are moved to the positions corresponding to the two first locking plates, when the first operating handle is inserted through the first through hole, the first operating handle can push the two first locking plates forward through the first and second clearance positions. The first operating handle can be completely inserted into the ends of the first and second transmission components and rotated to control the first and second transmission components, and to perform closing, opening, or grounding operations on the upper and lower switches. Since the entire process only requires the second locking plate to move up and down to achieve control, the setting of crank arms and connecting rods can be greatly reduced, making the control more precise and the response faster. In addition, the transmission device of this application is compatible with various specifications of high-voltage cabinets and has strong versatility.

[0005] In some embodiments, it further includes: a positioning mechanism disposed on the housing and located on one side of the first transmission member, which can extend to position the first transmission member at an angle when the first transmission member rotates to a predetermined angle; By setting a positioning mechanism, the first transmission component can be positioned when the first and second transmission components rotate to a predetermined angle, thus avoiding the inaccuracy of the rotation angle of the first transmission component, which would prevent the precise control of the disconnecting switch.

[0006] In some embodiments, the locking mechanism further includes: a first swing plate rotatably connected to the housing and a second operating handle fixedly connected to the first swing plate for driving the second locking plate to swing, wherein the first swing plate has a guide groove for inserting a first protrusion disposed on the second locking plate.

[0007] In some embodiments, the second locking plate has a vertically extending elongated adjustment hole for inserting a first fixing post disposed on the housing.

[0008] In some embodiments, the positioning mechanism includes: a positioning disc sleeved on a first transmission member, having a plurality of positioning grooves spaced apart on its edge and a contact point protruding outward in front of each positioning groove on its end face; a receiving box having a second through hole on its side; a second elastic member laterally disposed in the receiving box; a pin with one end abutting against the second elastic member and the other end extending out of the second through hole; a third operating handle extending into the receiving box and connected to the pin, capable of driving the pin to move laterally so that its other end retracts into the receiving box; a stop plate movably disposed on the outside of the receiving box; and a third elastic member longitudinally disposed and abutting against the stop plate, capable of driving the stop plate to move longitudinally toward the second through hole after the other end of the pin retracts into the receiving box to block the second through hole, wherein, when the corresponding contact point rotates with the positioning disc to a position opposite to the stop plate, it can push the stop plate outward to open the second through hole so that the pin can extend out of the second through hole and insert into the corresponding positioning groove; By setting a first elastic element, a pin, an operating handle, a second elastic element, a stop plate, and a positioning plate, the positioning plate has a positioning groove and a contact point. Initially, by pulling the other end of the pin into the receiving box by the handle, the stop plate moves longitudinally under the elastic force of the second elastic element to block the second through hole. In this way, the pin will not obstruct the rotation of the positioning plate. When the predetermined positioning groove rotates to the position of the stop plate, the contact point on the front side of the positioning groove can push the stop plate outward to open the second through hole, allowing the pin to extend from the second through hole and insert into the corresponding positioning groove to position the rotation angle of the positioning plate. When the positioning plate is rotated again, the pin can be pulled back into the receiving box and the above actions can be repeated. In this way, the rotation angle of the transmission component can be precisely controlled. The positioning mechanism of this application, when installed after the transmission device, can improve the accuracy of the transmission device and ensure the safe and stable operation of the power system.

[0009] In some embodiments, the stop plate includes: a blocking portion bent toward the receiving box and disposed parallel to the second through hole, and a contact portion located on one side of the blocking portion and extending toward the first transmission member, capable of contacting the contact point.

[0010] In some embodiments, the side of the contact portion protrudes towards the contact point and forms an arc-shaped structure. By setting the side of the contact portion to an arc-shaped structure, the friction between the contact portion and the contact point is reduced, thereby improving the smoothness of the unlocking process.

[0011] In some embodiments, it further includes: a locking pin disposed on the housing for locking the high-voltage cabinet door and a second swing plate, wherein one end of the second swing plate is fixedly connected to the second transmission member, and the second swing plate is provided with a locking groove for inserting a second protrusion disposed on the locking pin; By setting a locking pin and a second swing plate, the second transmission component cannot be operated after the high-voltage cabinet is closed, further ensuring safety.

[0012] In some embodiments, the system further includes: first and second gears respectively connected to the first and second transmission members, wherein the two first gears are spaced apart by a predetermined distance and have V-shaped limiting openings on opposite sides. By setting the first gears with a specific structure, the two first gears will touch each other to limit the angle when the first or second transmission member rotates to the maximum angle, thereby preventing the first and second transmission members from rotating too much and improving the accuracy of control.

[0013] In some embodiments, a sliding groove is provided on the housing corresponding to the position of the third operating handle for the third operating handle to slide, and a locking piece is provided at one end of the sliding groove for the lock to lock the third operating handle onto it. Attached Figure Description

[0014] Figure 1 This is a first-view structural schematic diagram of the dual-isolation high-voltage switchgear transmission device of the present invention; Figure 2 This is a schematic diagram of the structure of the dual-isolation high-voltage switchgear transmission device of the present invention with the first panel omitted; Figure 3 This is a structural schematic diagram of the dual-isolation high-voltage switchgear transmission device of the present invention from a second perspective; Figure 4 This is a first-view structural schematic diagram of the locking mechanism of the dual-isolation high-voltage switchgear transmission device of the present invention; Figure 5 This is a second-view structural schematic diagram of the locking mechanism of the dual-isolation high-voltage switchgear transmission device of the present invention; Figure 6 This is a schematic diagram of the positioning mechanism of the dual-isolation high-voltage switchgear transmission device of the present invention; Figure 7 This is an exploded view of the positioning mechanism of the dual-isolation high-voltage switchgear transmission device of the present invention; Figure 8 This is an initial state diagram of the first and second gears of the dual-isolation high-voltage switchgear transmission device of the present invention; Figure 9 This is a diagram showing the rotation state of the first and second gears of the dual-isolation high-voltage switchgear transmission device of the present invention.

[0015] Figure label: 1. Outer shell; 2. First transmission component; 3. Second transmission component; 4. First locking plate; 5. Second locking plate; 501. Up and down adjustment hole; 502. First clearance position; 503. Second clearance position; 504. First protrusion; 505. First fixing post; 6. First elastic element; 7. Positioning mechanism; 701. Positioning plate; 7011. Positioning groove; 7012. Contact point; 702. Third operating handle; 703. Third elastic element; 704. Second fixing post; 705. Stop plate; 7051. Sealing part; 7052. Contact part; 706. Receiving box; 7061. Second through hole; 707. Second elastic element; 708. Pin; 8. Second operating handle; 9. Locking pin; 901. Second protrusion; 10. Second swing plate; 11. First swing plate; 1101. Guide groove; 12. Second gear; 13. First gear. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0017] Please see Figures 1-5 The present invention provides a double-isolation high-voltage switchgear transmission device, comprising: a housing 1, on which two first through holes are formed; a first transmission member 2 and a second transmission member 3 rotatably mounted on the housing 1 and respectively corresponding to one of the first through holes; one end of the first transmission member 2 and the second transmission member 3 being connected to an upper isolating switch and a lower isolating switch, respectively; and the shape of the other end matching the shape of a first operating handle connecting to a vacuum circuit breaker switch inside the high-voltage switchgear; and further comprising: a locking mechanism, comprising: two first elastic members 6 respectively sleeved on the other end of the first transmission member 2 and the second transmission member 3; and two first elastic members 6 respectively sleeved on the other end of the first transmission member 2 and the second transmission member 3. Two first locking plates 4 located at the other end of the first transmission member 2 and the second transmission member 3 and behind the two first elastic members 6, and a second locking plate 5 movably disposed on one side of the two first locking plates 4 and having first and second clearance positions 503 respectively on its edge, wherein when the edge of the second locking plate 5 abuts against the edges of the two first locking plates 4, it can prevent the two first locking plates 4 from moving forward and causing the locking mechanism to enter the locking state; or when the first and second clearance positions 503 move to the positions corresponding to the two first locking plates 4, the first and second locking plates 5 can pass through and move forward to enter the unlocking state. Specifically, the outer casing 1 includes multiple fixing plates.

[0018] Please see Figure 4 and Figure 5 Specifically, the locking mechanism also includes: a first swing plate 11 rotatably connected to the fixed plate on the rear side, and a second operating handle 8 fixedly connected to the first swing plate 11 for driving the second locking swing. Specifically, the first swing plate 11 is provided with a guide groove 1101 for the insertion of the first protrusion 504 set on the second locking plate 5.

[0019] Please see Figure 2 Specifically, the second locking plate 5 has a long strip-shaped upper and lower adjustment hole 501 for the insertion of the first fixing post 505 set on the outer shell 1.

[0020] Specifically, the vacuum circuit breaker switch is connected to the second locking plate 5.

[0021] Specifically, initially, the vacuum circuit breaker switch is in the closed state, the edge of the second locking piece 5 abuts against the edges of the two first locking pieces 4 to limit the movement, the two first locking pieces 4 cannot move forward, and the first operating handle cannot be inserted into the ends of the first transmission member 2 and the second transmission member 3 to rotate the first transmission member 2 and the second transmission member 3. At this time, it is in the locked state. When maintenance is required, the first swing plate 11 is swung by the second operating handle 8. The first swing plate 11 drives the second locking plate 5 to move through the guide groove 1101. When the vacuum circuit breaker is opened, the first clearance position 502 and the second clearance position 503 of the second locking plate 5 move to the position corresponding to the two first locking plates 4. At this time, the first operating handle can be put into the end of the first transmission component 2 and the second transmission component 3. The first operating handle can be inserted into the first through hole to push the two first locking plates 4 forward through the first clearance position 502 and the second clearance position 503. Then, the first operating handle is fully inserted into the ends of the first transmission component 2 and the second transmission component 3. At this time, it is in the unlocked state. The first transmission component 2 and the second transmission component 3 can be turned to control the first transmission component 2 and the second transmission component 3 (open or close the upper and lower isolating switches or ground the upper and lower isolating switches). When the maintenance is completed and the first operating handle is extended, the first elastic element 6 can drive the first locking piece 4 to reset. Then, the vacuum circuit breaker switch is opened. At this time, the edge of the second locking piece 5 moves again to the position that blocks the first locking piece 4, and the transmission device enters the locking state again.

[0022] Please see Figure 6 and Figure 7Preferably, this application also includes a positioning mechanism 7, which includes: a positioning disc 701 sleeved on the first transmission member 2, with multiple positioning grooves 7011 spaced apart on its edge and an outwardly protruding contact point 7012 on its end face before each positioning groove 7011; a receiving box 706 with a second through hole 7061 on its side; a second elastic member 707 laterally disposed in the receiving box 706; a pin 708 with one end abutting against the second elastic member 707 and the other end extending out of the second through hole 7061; and a pin 708 extending into the receiving box 706 and connected to the pin 708, capable of driving the pin 708 to move laterally so that its other end retracts into the receiving box 706. The accommodating box 706 includes a third operating handle 702, a stop plate 705 movably disposed on the outside of the accommodating box 706, and a third elastic element 703 longitudinally disposed and abutting against the stop plate 705, which can block the second through hole 7061 by driving the stop plate 705 to move longitudinally in the direction of the second through hole 7061 after the other end of the pin 708 is retracted into the accommodating box 706. The corresponding contact 7012 can push the stop plate 705 outward to open the second through hole 7061 when the positioning plate 701 rotates to the position opposite to the stop plate 705, allowing the pin 708 to extend from the second through hole 7061 and be inserted into the corresponding positioning groove 7011.

[0023] Specifically, the stop plate 705 includes: a blocking portion 7051 bent toward the receiving box 706 and arranged parallel to the second through hole 7061, and a contact portion 7052 located on one side of the blocking portion 7051 and extending toward the first transmission member 2, which can contact the contact point 7012.

[0024] Specifically, the positioning disk 701 is mounted on the first transmission component 2 and can rotate with the first transmission component 2.

[0025] Specifically, initially, the third elastic element 703 is in a compressed state. At this time, manually pulling the third operating handle 702 retracts the other end of the pin 708 into the receiving box 706. Without the pin 708 obstructing the movement, the third elastic element 703 drives the stop plate 705 forward, and the sealing part 7051 blocks the second through hole 7061. The pin 708 does not obstruct the rotation of the positioning plate 701. When the contact point 7012 corresponding to the positioning plate 701 rotates to the position corresponding to the contact part 7052, the contact point 7012... When the contact part 7052 touches and pushes the stop piece 705 to move backward, the third elastic member 703 is compressed again. Without the obstruction of the sealing part 7051, the pin 708 extends outward. When the corresponding positioning groove 7011 rotates to the position opposite to the pin 708, the pin 708 is inserted into the positioning groove 7011 to position the positioning plate 701 and the first transmission member 2. When it is necessary to continue rotating the first transmission member 2, the third operating handle 702 is pulled again to move laterally, and the positioning mechanism 7 repeats the above actions.

[0026] Specifically, there are three positioning slots 7011, which correspond to the closing, opening, and grounding of the disconnecting switch, respectively.

[0027] Preferably, the side of the contact portion 7052 protrudes towards the contact point 7012 and forms an arc-shaped structure.

[0028] Preferably, the outer casing 1 is provided with a locking pin 9 for locking the high-voltage cabinet door. Furthermore, this application also provides a second swing plate 10, wherein one end of the second swing plate 10 is fixedly connected to the second transmission member 3, and the second swing plate 10 is provided with a locking groove for the second protrusion 901 provided on the locking pin 9 to be inserted. When the cabinet door is locked and the locking pin 9 is fixed, the second protrusion 901 is fixed and the second swing plate 10 cannot swing. At this time, the second transmission member 3 cannot rotate, which can ensure the safety of the high-voltage cabinet.

[0029] Please see Figure 8 and Figure 9 Preferably, the first transmission member and the second transmission member are respectively fitted with second gears 12, and the two second gears 12 mesh with the corresponding first gears 13. The two first gears 13 are spaced apart by a predetermined distance and have V-shaped limiting openings on opposite sides. When one of the first gears 13 rotates to the maximum angle, it will abut against the V-shaped limiting opening of the other first gear 13, thereby limiting the first transmission member 2 or the second transmission member 3 from exceeding the maximum angle during rotation.

[0030] Preferably, the outer casing 1 has a sliding groove for the third operating handle 702 to slide on at the position corresponding to the third operating handle 702, and a locking piece is provided at one end of the sliding groove for the lock to lock the third operating handle 702 onto it.

[0031] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A double-isolation high-voltage switchgear transmission device, characterized in that, include: The outer casing (1) has two first through holes. A first transmission member (2) and a second transmission member (3) are rotatably mounted on the outer casing (1) and are respectively disposed corresponding to one of the first through holes. One end of the first transmission member (2) and the second transmission member (3) are respectively connected to the upper disconnect switch and the lower disconnect switch, and the shape of the other end matches the shape of the first operating handle of the vacuum circuit breaker switch in the high-voltage cabinet. The casing also includes a locking mechanism, which includes two first elastic members (6) respectively sleeved on the other end of the first transmission member (2) and the second transmission member (3) and located on the other end of the two first transmission members (2) and the second transmission member (3). The first elastic element (6) is followed by two first locking pieces (4) and a second locking piece (5) is movably disposed on one side of the two first locking pieces (4) and has a first clearance position (502) and a second clearance position (503) respectively on its edge. When the edge of the second locking piece (5) abuts against the edge of the two first locking pieces (4), it can prevent the two first locking pieces (4) from moving forward and causing the locking mechanism to enter the locking state. Or when the first clearance position (502) and the second clearance position (503) move to the position corresponding to the two first locking pieces (4), the first locking pieces (4) and the second locking piece (5) can pass through and move forward to enter the unlocking state. It also includes: a positioning mechanism (7) disposed on the housing (1) and located on one side of the first transmission member (2), which can extend to position the first transmission member (2) at an angle when the first transmission member (2) rotates to a predetermined angle; The positioning mechanism (7) includes: a positioning disc (701) sleeved on the first transmission member (2), with multiple positioning grooves (7011) spaced apart on its edge and an outwardly protruding contact point (7012) provided on the end face before each positioning groove (7011); a receiving box (706) with a second through hole (7061) on its side; a second elastic member (707) laterally disposed in the receiving box (706); a pin (708) with one end abutting against the second elastic member (707) and the other end extending out from the second through hole (7061); and a third operating handle (708) extending into the receiving box (706), connected to the pin (708), and capable of driving the pin (708) to move laterally so that its other end retracts into the receiving box (706). 02) A stop plate (705) movably disposed on the outside of the accommodating box (706) and a third elastic member (703) longitudinally disposed and abutting against the stop plate (705), which can drive the stop plate (705) to move longitudinally toward the second through hole (7061) after the other end of the pin (708) is retracted into the accommodating box (706) to block the second through hole (7061). The corresponding contact (7012) can push the stop plate (705) outward to open the second through hole (7061) when the positioning plate (701) rotates to the position opposite to the stop plate (705) to allow the pin (708) to extend from the second through hole (7061) and insert into the corresponding positioning groove (7011).

2. The dual-isolation high-voltage switchgear transmission device according to claim 1, characterized in that, The locking mechanism further includes: a first swing plate (11) rotatably connected to the outer shell (1) and a second operating handle (8) fixedly connected to the first swing plate (11) for driving the second locking plate (5) to swing, wherein the first swing plate (11) is provided with a guide groove (1101) for inserting a first protrusion (504) provided on the second locking plate (5).

3. The dual-isolation high-voltage switchgear transmission device according to claim 1, characterized in that, The second locking piece (5) has a long strip-shaped upper and lower adjustment hole (501) for inserting the first fixing post (505) set on the outer shell (1).

4. The dual-isolation high-voltage switchgear transmission device according to claim 1, characterized in that, The stop plate (705) includes: a blocking portion (7051) bent toward the receiving box (706) and arranged parallel to the second through hole (7061) and a contact portion (7052) located on one side of the blocking portion (7051) and extending toward the first transmission member (2) and capable of contacting the contact point (7012).

5. The dual-isolation high-voltage switchgear transmission device according to claim 4, characterized in that, The side of the contact portion (7052) protrudes toward the contact point (7012) and forms an arc-shaped structure.

6. The dual-isolation high-voltage switchgear transmission device according to claim 1, characterized in that, Also includes: A locking pin (9) and a second swing plate (10) are provided on the outer shell (1) for locking the high voltage cabinet door. One end of the second swing plate (10) is fixedly connected to the second transmission member (3), and a locking groove is provided on the second swing plate (10) for the second protrusion (901) provided on the locking pin (9) to be inserted.

7. The dual-isolation high-voltage switchgear transmission device according to claim 1, characterized in that, Also includes: The first gear (13) is connected to the first transmission member (2) and the second transmission member (3) respectively. The two first gears (13) are spaced apart by a predetermined distance and have V-shaped limiting openings on opposite sides.

8. The double-isolation high-voltage switchgear transmission device according to claim 1, characterized in that, The outer casing (1) has a sliding groove for the third operating handle (702) to slide on the position corresponding to the third operating handle (702), and a locking piece is provided at one end of the sliding groove so that the lock can lock the third operating handle (702) onto the locking piece.

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