CN114420479B - Cable chamber door interlocking structure of upper three-station ring main unit - Google Patents

Abstract

The invention provides a cable chamber door interlocking structure of an upper three-station ring main unit, which comprises a grounding interlocking mechanism provided with a grounding interlocking stop block and a breaker interlocking mechanism provided with a breaker interlocking stop block, wherein a first transmission mechanism is arranged between the grounding interlocking stop block and a three-station isolating switch operating mechanism and is used for enabling the grounding interlocking stop block to have an unlocking position corresponding to the grounding state of the three-station isolating switch operating mechanism and a locking position corresponding to the isolating brake separating and isolating brake closing states of the three-station isolating switch operating mechanism; a second transmission mechanism is arranged between the circuit breaker interlocking stop block and the circuit breaker operating mechanism and is used for enabling the circuit breaker interlocking stop block to have an unlocking position corresponding to the closing state of the circuit breaker operating mechanism and a locking position corresponding to the opening state of the circuit breaker operating mechanism; the technical problem that the interlocking mechanism of the cable chamber door of the upper three-station ring main unit in the prior art is poor in reliability is effectively solved.

Description

A cable room door interlocking structure for a three-station ring main unit

Technical field

The invention relates to the interlocking between the casing, cover or protective cover and the operating mechanism, and specifically relates to a cable room door interlocking structure of an upper three-station ring main unit.

Background technique

The upper three-station ring main unit refers to a ring main unit in which the three-station isolating switch is set above the circuit breaker. When the cabinet using the upper three-station isolating switch is to be grounded, the upper three-station isolating switch needs to be in the grounding position. status and circuit breaker closing at the same time. According to the five-proof interlocking requirements of the GB/T3906 standard, the cable room door can only be opened when the cabinet is in a grounded state. This requires adding an upper three-station isolation switch to the cable room during the design. Door interlock and circuit breaker interlock the cable room door. In addition, the cable room doors on the existing cabinets include hinged cable room doors and lift-up cable room doors. In order to meet the arcing requirements, the cable room doors on the cabinets mostly use the lift-up cable room door. There is an L-shaped buckle on the cable room door, which is used to match the slot on the cabinet. When you need to open the cable room door, you need to lift the cable room door first to release the buckle from the slot. The door will open.

In the prior art, the interlocking of the cable room door by the upper three-station isolating switch and the interlocking of the cable room door by the circuit breaker are realized through separately set grounding interlocking mechanisms and circuit breaker interlocking mechanisms. The grounding interlocking mechanism is used to realize The interlocking of the three-station isolating switch and the cable room door includes a first cam connected to the opening and closing indicating shaft of the upper three stations and a first ejector corresponding to the first cam. The lower end of the first ejector is connected to the first cam. Corresponding to the cable room door, the first push rod moves up and down when the first cam rotates to limit the cable room door and prevent the cable room door from being lifted up and opened. The circuit breaker interlocking mechanism is used to realize the interlocking of the circuit breaker and the cable room door, and includes a second cam provided on the opening and closing indicating shaft of the circuit breaker operating mechanism and a second push rod corresponding to the second cam. The lower end of the rod corresponds to the cable room door, and the second push rod moves up and down when the second cam rotates to limit the cable room door and prevent the cable room door from being lifted up and opened.

When the grounding interlocking mechanism and the circuit breaker interlocking mechanism in the prior art are used, if misoperation occurs, the force to prevent the cable room door from opening when lifting the cable room door is achieved by the corresponding push rod. Since the first and second The distance between the second cam and the cable chamber door is far, the length of the ejector rod between the first and second cams and the cable chamber door is long, and the radial size of the ejector rod is limited by the space of the ring main unit and is relatively thin, making the ejector rod in When subjected to a large lifting force, bending deformation will occur, causing the cable room door to be opened by mistake, resulting in poor reliability.

Contents of the invention

The object of the present invention is to provide a cable room door interlocking structure for a three-station ring main unit to solve the technical problem of poor reliability of the cable room door interlocking mechanism of the three-station ring main unit in the prior art.

In the present invention, the cable room door interlocking structure of the upper three-station ring main unit adopts the following technical solution:

The cable room door interlocking structure of the upper three-station ring main unit includes a grounding interlocking mechanism and a circuit breaker interlocking mechanism, which are respectively used to realize the connection between the three-station isolating switch operating mechanism and the cable room door and the circuit breaker operation. The interlock between the mechanism and the cable room door. The cable room door is a lift-up cable room door. Both the grounding interlocking mechanism and the circuit breaker interlocking mechanism include locking blocks, which are grounding interlocking blocks and circuit breakers respectively. The device interlocking block, the grounding interlocking block and the circuit breaker interlocking block are all rotated and assembled on the ring main unit; there is a first transmission mechanism between the grounding interlocking block and the three-station isolating switch operating mechanism. A transmission mechanism is used to make the grounding interlock stopper move with the three-position isolating switch operating mechanism and has an unlocking position corresponding to the grounding state of the three-position isolating switch operating mechanism and an unlocking position corresponding to the three-position isolating switch operating mechanism. The locking position corresponding to the isolation opening and isolation closing states; a second transmission mechanism is provided between the circuit breaker interlocking stop and the circuit breaker operating mechanism. The second transmission mechanism is used to make the circuit breaker interlocking stop follow the circuit breaker. The operating mechanism of the circuit breaker operates and has an unlocking position corresponding to the closing state of the circuit breaker operating mechanism and a locking position corresponding to the opening state of the circuit breaker operating mechanism; the locking block is provided with a blocking portion, and the blocking portion It is used to be located below the rotation axis of the interlocking block when the corresponding interlocking block is in the locking position, blocking the cable room door or the stopper fixed on the cable room door. When the cable room door is lifted, Bear the force passing through the rotation axis of the interlocking block to prevent the cable chamber door from opening; when the corresponding interlocking block is in the unlocking position, the blocking part is used to avoid the cable chamber door or the stopper to release the cable chamber door. Door lock.

Beneficial effects: During use of the cable room door interlocking structure of the upper three-station ring main unit provided by the present invention, when the grounding interlocking block and the circuit breaker interlocking block are in the locking position, the The blocking part is located below its rotation axis and blocks the cable chamber door or the stopper fixed on the cable chamber door. When the cable chamber door is lifted, it bears the force of the rotation axis of the interlocking stopper and is consistent with the current situation. Compared with the conventional technology that uses a longer push rod to withstand the opening force of the cable chamber door, the rotation axis of the interlocking block is relatively close to the cable chamber door, and the connection between the blocking part of the interlocking block and its rotation axis is The direction of the wire and the lifting force coincides, so that the interlocking block forms a blocking fit with the cable room door in the up and down direction, which effectively improves the reliability of the interlocking structure.

Further, the bottommost side of the locking stop is an arc-shaped surface, the blocking portion is located on the arc-shaped surface, and the rotation axis of the arc-shaped surface is parallel to the rotation axis of the locking stop.

Beneficial effects: When the locking stopper completes the switching between the unlocking position and the locking position by swinging, it is necessary to maintain a certain gap between the blocking part and the corresponding blocking position on the cable room door, so that the locking stopper can Smooth swing, the blocking part is located on the arc surface, which can reduce the gap between the blocking part and the corresponding blocking position on the cable chamber door to avoid excessive gap, thereby affecting the blocking effect; the rotation axis of the arc surface and the locking stop The parallel axis of rotation can ensure that the interlocking block swings more smoothly.

Further, the grounding interlocking block and the circuit breaker interlocking block are rotatably assembled on the same rotating shaft.

Beneficial effects: The grounding interlocking block and the circuit breaker interlocking block are rotated and assembled on the same rotating shaft. On the one hand, the structural settings of the grounding interlocking mechanism and the circuit breaker interlocking mechanism can be reduced, the number of corresponding parts can be reduced, and the grounding connection can be facilitated. The structural arrangement of the locking mechanism and the circuit breaker interlocking mechanism; on the other hand, the grounding interlocking block and the circuit breaker interlocking block are arranged more compactly, which can also save installation space.

Further, the first transmission mechanism includes a ground transmission link hinged on the ground interlock block, the second transmission mechanism includes a circuit breaker transmission link hinged on the circuit breaker interlock block, the ground transmission link and Both ends of the circuit breaker transmission connecting rod are provided with hinged structures for forming a linkage mechanism to realize the driving of the grounding interlocking block and the circuit breaker interlocking block.

Beneficial effects: The connecting rod transmission mechanism is easy to design, has a simple structure and stable transmission.

Further, both the grounding interlocking block and the circuit breaker interlocking block include two side arms arranged in an L shape; the hinge between the grounding interlocking block and the corresponding connecting rod and the grounding link The blocking parts of the locking block are respectively located on the two side arms of the grounding interlocking block, the hinge of the circuit breaker interlocking block and the corresponding connecting rod and the blocking part of the circuit breaker interlocking block. They are respectively located on the two side arms of the circuit breaker interlocking block.

Beneficial effects: The grounding interlock block and the circuit breaker interlock block adopt such a structure, which facilitates the connection of the corresponding transmission link and can form a longer driving arm, and also facilitates the flexible setting of the connection part of the transmission link, which can make The corresponding transmission mechanism drives the grounding interlocking block and the circuit breaker interlocking block to rotate more smoothly.

Further, the hinged portions of the grounding interlocking block and the corresponding connecting rod and the hinged portions of the circuit breaker interlocking block and the corresponding connecting rod are arranged oppositely on both sides of the rotation axis of the locking block.

Beneficial effects: This arrangement can prevent the corresponding connecting rods of the first and second transmission mechanisms from interfering during operation, and is conducive to ensuring the stability of the interlocking structure.

Further, the cable room door interlocking structure also includes an adjustment block provided on at least one end of the grounding transmission link and/or the circuit breaker transmission link. The adjustment block is provided with a connecting rod through hole, the grounding transmission link and/or the circuit breaker The transmission connecting rod passes through the connecting rod hole and has two adjusting nuts threaded on it. The two adjusting nuts are respectively set at both ends of the connecting rod hole to connect the adjusting block to the corresponding grounded transmission connecting rod or circuit breaker. The transmission link is fixed, and the adjustment block is provided with a hinge structure. The hinge structure is used to realize the hinge of the corresponding ends of the ground transmission link and/or the circuit breaker transmission link.

Beneficial effects: The transmission connecting rod is hinged through the adjusting block, which can facilitate the installation of the transmission connecting rod; in addition, the transmission connecting rod can determine the position of the adjusting block on the transmission connecting rod by adjusting the positions of the two adjusting nuts. When encountering assembly When the error occurs, the transmission length of the transmission connecting rod can be adjusted according to assembly needs, which effectively improves assembly efficiency.

Further, the first transmission mechanism includes a grounding interlocking swing arm hinged on the ring main unit. Both ends of the grounding transmission connecting rod are respectively hinged with the grounding interlocking swing arm and the grounding interlocking block; the grounding interlocking swing arm is connected with Return spring, the first transmission mechanism also includes a swing arm limiting structure. The swing arm limiting structure is used to limit the swing position of the ground interlock swing arm under the action of the return spring to the locking position with the ground interlock stopper. Correspondingly, the first transmission mechanism also includes a toggle piece fixed on the opening and closing indicating shaft or the opening and closing operating shaft of the three-station isolating switch operating mechanism. The toggle piece is used to operate the three-station isolating switch operating mechanism. During the grounding operation, the grounding interlocking swing arm is toggled to drive the grounding interlocking stopper to rotate to the unlocking position. When the three-station isolating switch operating mechanism performs isolation opening and closing, the toggle piece and the grounding interlocking swing arm are separated from each other. .

Beneficial effects: Since the return spring and the grounding interlocking swing arm are relatively independent of the three-station isolating switch operating mechanism, after the toggle member and the grounding interlocking swing arm are released from the cooperation relationship, the return spring cooperates with the swing arm limit structure, and When the isolation is closing and opening, the grounding interlocking swing arm can be kept in the locked position. Only when the three-position isolating switch operating mechanism is grounded, the grounding interlocking swing arm can be rotated to the unlocking position through the toggle. The corresponding relationship between the three working positions of the three-position switch operating mechanism and the two swing positions of the grounding interlocking swing arm is satisfied.

Further, the toggle member includes a dial fixed on the opening and closing indicating shaft, and the end surface of the dial is provided with a toggle pin for toggle the grounding interlocking swing arm.

Beneficial effects: The toggle piece adopts such a structure in order to utilize the original dial on the opening and closing indicating shaft. Only one toggle pin needs to be installed during installation, which is very convenient to install.

Further, the second transmission mechanism includes a circuit breaker interlocking arm. The circuit breaker interlocking arm is drivingly connected to the opening and closing indicating shaft or the opening and closing operating shaft of the circuit breaker operating mechanism. Both ends of the circuit breaker transmission connecting rod They are respectively hinged with the circuit breaker interlock arm and the circuit breaker interlock stop. The circuit breaker interlock arm is used to drive the circuit breaker interlock stop through the circuit breaker transmission connecting rod during the closing action of the circuit breaker operating mechanism. Rotate to the unlocking position, and during the opening action of the circuit breaker operating mechanism, the circuit breaker transmission connecting rod drives the circuit breaker interlocking stopper to rotate to the locking position.

Beneficial effects: Since the circuit breaker interlocking block only needs to correspond to the closing state of the circuit breaker operating mechanism when it is in the unlocking position, and when the circuit breaker interlocking block is in the locking position, it only needs to correspond to the opening of the circuit breaker operating mechanism. The corresponding state is relatively simple. The second transmission mechanism adopts a structure such as a circuit breaker transmission link and a circuit breaker interlocking arm, which can ensure stable transmission. At the same time, this structure is relatively simple and easy to assemble.

Description of the drawings

Figure 1 is a schematic diagram of the first state of the cable room door interlocking structure of the upper three-station ring main unit provided by the present invention;

Figure 2 is a schematic diagram of the second state of the cable room door interlocking structure of the upper three-station ring main unit provided by the present invention;

Figure 3 is a schematic diagram of the third state of the cable room door interlocking structure of the upper three-station ring main unit provided by the present invention;

Figure 4 is a schematic diagram of the assembly of the grounding interlock block, the circuit breaker interlock block and the block shaft;

Figure 5 is a schematic diagram of the cooperation between the toggle pin and the grounding interlocking swing arm;

Figure 6 is a schematic diagram of the assembly of the cable chamber door interlocking structure of the upper three-station ring main unit provided by the present invention on the ring main unit.

The names of the components corresponding to the corresponding reference signs in the figure are:

1. Ring main unit; 11. Three-station opening and closing indicator shaft; 12. Stopper shaft; 13. Cable room door; 14. Stopper; 15. Circuit breaker opening and closing indicator shaft; 16. Three-station Isolating switch operating mechanism; 17. Circuit breaker operating mechanism; 18. Circuit breaker opening and closing indicator shaft; 19. U-shaped mounting base; 2. First transmission mechanism; 21. Dial; 22. Toggle pin; 23. Grounding interlocking swing arm; 231. Turning edge; 24. Swing arm limit shaft; 25. Return spring; 26. Grounding transmission connecting rod; 27. Grounding interlocking stopper; 28. Upper grounding adjustment block; 29. Lower grounding adjustment block; 3. Second transmission mechanism; 31. Circuit breaker interlocking arm; 32. Circuit breaker transmission connecting rod; 33. Upper circuit breaker adjustment block; 34. Lower circuit breaker adjustment block; 35. Circuit breaker connection Lock stop.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention. That is, the described embodiments are only some embodiments of the present invention, rather than all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the invention provided in the appended drawings is not intended to limit the scope of the claimed invention, but rather to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present invention.

It should be noted that in the specific implementation of the present invention, the terms that may appear, such as "first" and "second" and other relational terms, are only used to distinguish one entity or operation from another entity or operation. , without necessarily requiring or implying any actual relationship or sequence between these entities or operations. Furthermore, the possible occurrence of terms such as "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements not only includes those elements, but also includes Other elements not expressly listed or inherent in such process, method, article or equipment. Without further limitation, the possible occurrence of a qualifying element such as the statement "comprises a..." does not exclude the presence of other identical elements in a process, method, article or device that includes the stated element.

In the description of the present invention, unless otherwise explicitly stipulated and limited, the terms "installation", "connection" and "connection" that may appear should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between the two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

In the description of the present invention, unless otherwise expressly stipulated and limited, the term "is provided with" that may appear should be understood in a broad sense. For example, the object of "is provided with" can be a part of the ontology, or it can be separate from the ontology. Arranged and connected to the body, the connection may be a detachable connection or a non-detachable connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

The present invention will be described in further detail below with reference to examples.

Embodiment 1 of the cable room door interlocking structure of the upper three-station ring main unit of the present invention:

As shown in Figures 1 to 6, the cable room door interlocking structure of the upper three-station ring main unit provided by this embodiment is arranged on the ring main unit 1, and the ring main unit 1 is provided with a circuit breaker operating mechanism 17, The three-station isolating switch operating mechanism 16 and the cable room door 13. The cable room door 13 is a lift-type cable room door. The three-station isolating switch operating mechanism 16 is located above the circuit breaker operating mechanism 17. The upper three-station The cable room door interlocking structure of the ring main unit includes a grounding interlocking mechanism and a circuit breaker interlocking mechanism. Both the grounding interlocking mechanism and the circuit breaker interlocking mechanism include locking blocks. The grounding interlocking mechanism passes through the corresponding locking blocks. The interlocking between the three-station isolating switch operating mechanism 16 and the cable room door 13 is realized. The circuit breaker interlocking mechanism realizes the interlocking between the circuit breaker operating mechanism 17 and the cable room door 13 through corresponding locking blocks. .

Specifically, the locking block on the grounding interlocking mechanism is the grounding interlocking block 27, the locking block on the circuit breaker interlocking mechanism is the circuit breaker interlocking block 35, and the cable room door 13 is provided with a blocking block. Part 14, as shown in Figure 4, the stopper shaft 12 is installed on the U-shaped mounting base 19 with the opening facing downward, and the U-shaped mounting base 19 is located on the ring main unit 1. The grounding interlocking block 27 and the circuit breaker interlocking block 35 are both rotatably assembled on the blocking shaft 12 , and the rotation axes of the grounding interlocking block 27 and the circuit breaker interlocking block 35 coincide with each other. A first transmission mechanism 2 is provided between the grounding interlocking block 27 and the three-position isolating switch operating mechanism 16. The three-position isolating switch operating mechanism 16 causes the grounding interlocking block 27 to follow the three-position isolating switch operating mechanism 16 through the first transmission mechanism 2. The station isolating switch operating mechanism 16 operates and has an unlocking position corresponding to the grounding state of the three-station isolating switch operating mechanism 16 and an isolation opening and isolation closing state corresponding to the three-station isolating switch operating mechanism 16 locking position. A second transmission mechanism 3 is provided between the circuit breaker interlocking block 35 and the circuit breaker operating mechanism 17. The circuit breaker operating mechanism 17 causes the circuit breaker interlocking block 35 to follow the circuit breaker operating mechanism through the second transmission mechanism 3. 17 operates, and has an unlocking position corresponding to the closing state of the circuit breaker operating mechanism 17 and a locking position corresponding to the opening state of the circuit breaker operating mechanism 17 .

In this embodiment, as shown in Figure 2, the first transmission mechanism 2 includes a grounding interlocking swing arm 23 and a grounding transmission link 26. The middle part of the grounding interlocking swing arm 23 is hinged on the ring main unit 1. The arm 23 is provided with a toggle side that cooperates with the three-station isolating switch operating mechanism 16. The toggle side is provided with a flip edge 231. The grounding interlock swing arm 23 is also connected with a return spring 25. In addition, the first transmission mechanism 2 also includes a swing arm limiting structure, and the swing arm limiting structure is a swing arm limiting shaft 24 . Correspondingly, the three-station isolating switch operating mechanism 16 is provided with a three-station opening and closing indicating shaft 11. A dial 21 is fixed on the three-station opening and closing indicating shaft 11. The end surface of the dial 21 is provided with a toggle. The pin 22, the dial 21 and the toggle pin 22 together serve as a toggle member for toggle the grounding interlocking swing arm 23. The grounding interlocking swing arm 23 and the grounding interlocking stopper 27 are connected through a grounding transmission link 26 .

In this embodiment, as shown in Figure 2, when the three-station isolating switch operating mechanism 16 moves to the grounding state, the three-station opening and closing indicating shaft 11 drives the dial 21 to rotate. As shown in Figure 5, the dial The toggle pin 22 on 21 is in pushing contact with the flange 231 on the grounding interlocking swing arm 23, and the toggle pin 22 on the grounding interlocking swing arm 23 swings clockwise, so that the grounding interlocking swing arm 23 is hinged with the grounding transmission link 26 One end swings upward, driving the grounding transmission link 26 to move upward, and the grounding transmission link 26 drives the grounding interlock stopper 27 to rotate around the stopper shaft 12. At this time, the return spring 25 is in an extended and accumulated state, and the grounding interlocking stopper 27 The blocking part on 27 avoids the stopper 14 on the cable chamber door 13 in the up and down direction. At this time, the grounding interlocking stopper 27 is in the unlocked position. As shown in Figure 1, when the three-station isolating switch operating mechanism 16 moves to the isolation opening and isolation closing states, the three-station opening and closing indicating shaft 11 drives the dial 21 to rotate, and the The toggle pin 22 is not in contact with the ground interlock swing arm 23, and the return spring 25 pulls the ground interlock swing arm 23, causing the ground interlock swing arm 23 to swing counterclockwise to a position where it blocks contact with the swing arm limit shaft 24. During the swing process, one end of the grounding interlocking swing arm 23 and the grounding transmission link 26 swings downward, driving the grounding transmission link 26 to move downward, and the grounding transmission link 26 drives the grounding interlocking stopper 27 around the stopper shaft 12 Rotate, the blocking part on the grounding interlocking block 27 is located below the blocking rotating shaft 12 and blocks the upward path on the blocking piece 14 on the cable room door 13, and is in contact with the blocking piece 14 on the cable room door 13. A blocking fit is formed in the up and down direction, and the cable chamber door 13 is lifted upward. The force of the blocking member 14 on the blocking portion of the grounding interlocking block 27 passes through the blocking shaft 12 .

In this embodiment, as shown in Figures 1 to 4, in order to facilitate the assembly of the grounding transmission link 26, as shown in Figures 1 and 2, the grounding transmission link 26, the grounding interlocking swing arm 23 and the grounding interlocking stop The blocks 27 are all hinged through the grounding adjustment block. The grounding adjustment block is divided into an upper grounding adjustment block 28 and a lower grounding adjustment block 29. The upper grounding adjustment block 28 is arranged at the upper end of the grounding transmission link 26, and the lower grounding adjustment block 29 is arranged at The lower end of the ground transmission connecting rod 26. Specifically, the upper grounding adjustment block 28 and the lower grounding adjustment block 29 are both provided with connection perforations, and the upper and lower ends of the grounding transmission link 26 pass through the connection perforations on the upper grounding adjustment block 28 and the lower grounding adjustment block 29 respectively. The upper and lower ends of the transmission connecting rod 26 are provided with external threads, and the external threads at the upper and lower ends of the grounding transmission connecting rod 26 are provided with two adjusting nuts (not shown in the figure), which are arranged on the grounding transmission connecting rod 26 The two adjusting nuts at the upper end are respectively located on both sides of the connecting hole of the upper grounding adjustment block 28, so that the upper grounding adjustment block 28 is fixed on the upper end of the grounding transmission connecting rod 26. The two adjusting nuts provided at the lower end of the ground transmission link 26 are respectively located on both sides of the connection hole of the lower ground adjustment block 29, so that the lower ground adjustment block 29 is fixed on the lower end of the ground transmission link 26. In addition, the upper ground adjustment block 28 and the lower ground adjustment block 29 are both provided with hinge structures. The upper ground adjustment block 28 is hinged with the corresponding end of the ground interlocking swing arm 23 through its own hinge structure, and the lower ground adjustment block 29 is hinged through its own hinge structure. The hinge structure is hinged with the grounding interlock stop 27. Since the grounding interlocking mechanism has errors during assembly, the advantage of this arrangement is that the transmission length of the grounding transmission connecting rod 26 can be adjusted by adjusting the position of the adjusting nut on the grounding transmission connecting rod 26 according to the assembly situation, which is very convenient. In addition, in order to facilitate the swing of the driven ground interlock stop 27, as shown in Figure 4, the ground interlock stop 27 includes two side arms arranged in an L shape. Among the two side arms, one of the side arms is connected to the The lower grounding adjustment block 29 is hinged, and the bottom side of the other side arm is an arc-shaped surface. This arc-shaped surface forms a blocking part of the grounding interlocking stopper 27. The rotation axis of the arcuate surface is consistent with the rotation of the grounding interlocking stopper 27. The axes are parallel, and the intersection of the two side arms is hinged on the pivot arm shaft 12 .

In this embodiment, as shown in Figures 2 and 3, the second transmission mechanism 3 includes a circuit breaker interlocking arm 31, and the circuit breaker operating mechanism 17 is provided with a circuit breaker opening and closing indicating shaft 18. The circuit breaker interlocking The lever arm 31 is drivingly connected to the circuit breaker opening and closing indicating shaft 18. There is a circuit breaker transmission link 32 between the circuit breaker interlocking lever 31 and the circuit breaker interlock stop 35. The two ends of the circuit breaker transmission link 32 They are hinged with the circuit breaker interlocking arm 31 and the circuit breaker interlocking stop 35 respectively. As shown in Figure 3, when the circuit breaker operating mechanism 17 moves to the closing position, the circuit breaker opening and closing indicating shaft 18 rotates clockwise to drive the circuit breaker interlock arm 31 to swing, causing the circuit breaker interlock arm 31 to swing. The hinged end of 31 and the circuit breaker transmission link 32 swings upward, the circuit breaker transmission link 32 moves upward, the circuit breaker transmission link 32 drives the circuit breaker interlock stop 35 to rotate around the stop shaft 12, and the circuit breaker interlock stop 35 The blocking part on the cable compartment door 13 avoids the stopper 14 on the cable chamber door 13 in the up and down direction. At this time, the circuit breaker interlocking stopper 35 is in the unlocking position. As shown in Figures 2 and 3, when the circuit breaker operating mechanism 17 moves to the opening state, the circuit breaker opening and closing indicating shaft 18 rotates counterclockwise to drive the circuit breaker interlocking arm 31 to swing, so that the circuit breaker interlocking arm 31 swings. The hinged end of the lock arm 31 and the circuit breaker transmission link 32 swings downward, the circuit breaker transmission link 32 moves downward, and the circuit breaker transmission link 32 drives the circuit breaker interlocking stop 35 to rotate around the stop shaft 12, causing the circuit breaker to The blocking part on the interlocking block 35 is located below the blocking shaft 12 and blocks the upward path of the blocking member 14 on the cable chamber door 13, and is formed in the up and down direction with the blocking member 14 on the cable chamber door 13. The stop cooperates to lift the cable chamber door 13 upward, and the force exerted by the stop 14 on the blocking portion of the circuit breaker interlocking stop 35 passes through the stop rotating shaft 12 .

In this embodiment, as shown in FIGS. 1 to 4 , in order to facilitate the assembly of the circuit breaker transmission link 32 , there is an even space between the circuit breaker transmission link 32 , the circuit breaker interlock arm 31 and the circuit breaker interlock stop 35 . The circuit breaker adjustment block is hinged by the circuit breaker adjustment block. The circuit breaker adjustment block is divided into an upper circuit breaker adjustment block 33 and a lower circuit breaker adjustment block 34. The upper circuit breaker adjustment block 33 is set at the upper end of the circuit breaker transmission link 32, and the lower circuit breaker adjustment block 34 It is arranged at the lower end of the circuit breaker transmission connecting rod 32. Specifically, the upper circuit breaker adjustment block 33 and the lower circuit breaker adjustment block 34 are both provided with connection holes, and the upper and lower ends of the circuit breaker transmission link 32 pass through the upper circuit breaker adjustment block 33 and the lower circuit breaker adjustment block 34 respectively. The connection holes are provided, the upper and lower ends of the circuit breaker transmission connecting rod 32 are provided with external threads, and the external threads at the upper and lower ends of the circuit breaker transmission connecting rod 32 are provided with two adjusting nuts (not shown in the figure), Two adjusting nuts provided on the upper end of the circuit breaker transmission link 32 are respectively located on both sides of the connection hole of the upper circuit breaker adjustment block 33, so that the upper circuit breaker adjustment block 33 is fixed on the upper end of the circuit breaker transmission link 32. Two adjusting nuts provided at the lower end of the circuit breaker transmission link 32 are respectively located on both sides of the connection hole of the lower circuit breaker adjustment block 34, so that the lower circuit breaker adjustment block 34 is fixed on the lower end of the circuit breaker transmission link 32. In addition, the upper circuit breaker adjustment block 33 and the lower circuit breaker adjustment block 34 are both provided with hinge structures. The upper circuit breaker adjustment block 28 is hinged with the corresponding end of the circuit breaker interlocking arm 31 through its own hinge structure. The lower circuit breaker adjustment block 33 is provided with a hinge structure. The block 29 is hinged with the circuit breaker interlocking block 35 through its own hinge structure.

In addition, in order to facilitate the swing of the driving circuit breaker interlocking stop, as shown in Figure 4, the circuit breaker interlocking stop 35 includes two side arms arranged in an L shape. Among the two side arms, one of the side arms Hinged with the lower circuit breaker adjustment block 34, the bottom side of the other side arm is an arc surface. This arc surface forms the blocking part of the circuit breaker interlock stop 35. The rotation axis of the arc surface is in contact with the circuit breaker lock stop. The axis of rotation of the block is parallel, and the intersection of the two side arms is hinged on the pivot arm axis 12.

In this embodiment, in order to avoid interference between the grounding interlocking mechanism and the circuit breaker interlocking mechanism, when the grounding interlocking block 27 and the circuit breaker interlocking block 35 are rotated and assembled on the blocking shaft 12, the grounding interlocking block 27 The hinge point between the upper and ground transmission link 26 and the hinge point between the circuit breaker interlocking block 35 and the circuit breaker transmission link 32 are arranged oppositely on both sides of the stop rotating shaft 12 . It needs special emphasis that in the cable room door interlocking structure of the upper three-station ring main unit provided in this embodiment, as shown in Figure 4, only the grounding interlocking block 27 and the circuit breaker interlocking block 35 are located at the same time. When the corresponding unlocking position is reached, the cable chamber door 14 can be opened upward normally.

Embodiment 2 of the cable room door interlocking structure of the upper three-station ring main unit of the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the first transmission mechanism includes a grounding interlocking swing arm, a grounding transmission link and a grounding interlocking block, and also includes a return spring and a swing arm limiter. structure. In this embodiment, the first transmission mechanism includes a grounding interlocking top wheel, an interlocking limit push rod and a return spring. The grounding interlocking top wheel is assembled on the opening and closing indicating shaft of the three-position isolation switch operating mechanism. The interlocking limit rod is guided and moved in the up and down direction and is assembled on the ring main unit. The upper end of the interlocking limit rod cooperates with the grounding interlocking cam. The lower end of the interlocking limiter rod is hinged with the grounding interlocking stopper. The grounding interlocking top wheel The outer circumferential surface includes an arc segment and a diameter gradient segment. The arc segment corresponding to the isolation opening and closing, and the diameter gradient segment corresponding to the grounding stroke. The three-station isolation switch operating mechanism drives the grounding connection during the opening or closing action. The arc segment on the lock top wheel pushes and cooperates with the interlocking limit rod, causing the interlocking limit rod to move downward, the return spring is compressed, and the interlocking limit rod drives the grounding interlocking stopper to rotate to the locking position, and the cable is The door is locked. During the grounding action of the three-station isolating switch operating mechanism, the diameter gradient section on the grounding interlocking top wheel contacts the upper end of the interlocking limit rod. When the three-station isolating switch operating mechanism moves to the grounding position When the diameter gradient section is out of contact with the upper end of the interlocking limit rod, the interlocking limit rod moves upward under the action of the return spring, and the interlocking limit rod drives the grounding interlocking stopper to rotate to the unlocking position, completing the cable chamber Door unlocking.

Embodiment 3 of the cable room door interlocking structure of the upper three-station ring main unit of the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the second transmission mechanism includes a circuit breaker interlocking arm and a circuit breaker transmission connecting rod. In this embodiment, the second transmission mechanism includes a circuit breaker interlocking cam, an interlocking limit lever and a return spring. The circuit breaker interlocking cam is assembled on the opening and closing indicating shaft or the opening and closing operation of the circuit breaker operating mechanism. On the shaft, the interlocking limit rod is guided and assembled on the ring main unit along the up and down direction. The upper end of the interlocking limit rod cooperates with the circuit breaker interlocking cam, and the lower end of the interlocking limit rod is hinged with the circuit breaker interlocking stop; the circuit breaker During the opening process, the circuit breaker operating mechanism drives the raised part on the circuit breaker interlock cam to push the interlock limit lever downward, causing the return spring to be compressed. The circuit breaker limit lever drives the grounding interlock stopper to rotate to the lock position. stop position to lock the cable room door. During the closing action, the circuit breaker operating mechanism drives the convex part on the circuit breaker interlock cam to disengage the interlock limit lever. The interlock limit lever moves upward under the action of the return spring, and the circuit breaker limit lever drives the The grounding interlock stopper rotates to the unlocking position to complete the unlocking of the cable room door.

Embodiment 4 of the cable room door interlocking structure of the upper three-station ring main unit of the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the grounding interlocking block and the circuit breaker interlocking block are assembled on the same rotating shaft. In this embodiment, the grounding interlocking block and the circuit breaker interlocking block are assembled on two different rotating shafts, and the axes of the two rotating shafts coincide.

Embodiment 5 of the cable room door interlocking structure of the upper three-station ring main unit of the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, both the grounding interlocking block and the circuit breaker interlocking block include two side arms arranged in an L shape. In this embodiment, the grounding interlocking block and the circuit breaker interlocking block have a triangular structure as a whole. The hinges of the grounding interlocking block and the corresponding connecting rods and the blocking parts of the grounding interlocking block are respectively located at the grounding interlocking block. At two of the vertices on the block, the grounding interlock block is assembled on the block shaft by rotating at the remaining vertices; the hinge of the circuit breaker interlock block and the corresponding connecting rod and the blocking part of the circuit breaker interlock block are respectively Located at two vertices on the circuit breaker interlocking block, the circuit breaker interlocking block is assembled on the block rotating shaft by rotating at the remaining vertices.

Embodiment 6 of the cable room door interlocking structure of the upper three-station ring main unit of the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, both the grounding interlocking block and the circuit breaker interlocking block include two side arms arranged in an L shape, one of which is connected to the corresponding side arm. The transmission link is articulated and the other side arm is articulated with the corresponding interlocking stop. In this embodiment, the grounding interlocking block and the circuit breaker interlocking block each include only one side arm, which is hinged with the corresponding transmission link and the corresponding interlocking block.

Embodiment 7 of the cable room door interlocking structure of the upper three-station ring main unit of the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, both ends of the grounding transmission link and the circuit breaker transmission link are provided with adjustment blocks, and the position of the adjustment block on the corresponding transmission link can be adjusted. To complete the adjustment of the transmission length of the corresponding transmission connecting rod. In this embodiment, the grounding transmission link and the circuit breaker transmission link are provided with an adjustment block only on one end, and the end without an adjustment block is provided with a hinged structure. The position of the adjustment block on the transmission link is adjustable by adjusting only one end. The adjustment block at the position can also adjust the transmission length of the corresponding transmission connecting rod. In other embodiments, adjustment blocks are provided at both ends of the ground transmission link and the circuit breaker transmission link. The adjustment blocks are fixed in position on the transmission link, and the transmission length of the transmission link is also fixed accordingly.

Embodiment 8 of the cable room door interlocking structure of the upper three-station ring main unit of the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the toggle member is fixed on the opening and closing indicating shaft of the three-position isolating switch operating mechanism. In this embodiment, the toggle member is fixed on the opening and closing operating shaft of the three-position isolating switch operating mechanism.

Embodiment 9 of the cable room door interlocking structure of the upper three-station ring main unit of the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the toggle member includes a dial and a toggle pin. In this embodiment, the toggle member is a toggle arm, and the toggle arm is directly fixed on the opening and closing indicating shaft.

Embodiment 10 of the cable room door interlocking structure of the upper three-station ring main unit of the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the circuit breaker interlocking arm is drivingly connected to the opening and closing indicating shaft of the circuit breaker operating mechanism. In other embodiments, the circuit breaker interlocking arm is drivingly connected to the opening and closing operating shaft of the circuit breaker operating mechanism.

Embodiment 11 of the cable room door interlocking structure of the upper three-station ring main unit of the present invention:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, when the grounding interlocking block and the circuit breaker interlocking block are in the locking position, they block the blocking member on the cable room door. In this embodiment, there is no blocking member on the cable room door. When the grounding interlocking block and the circuit breaker interlocking block are in the locked position, the blocking parts of the grounding interlocking block and the circuit breaker interlocking block are located at above the cable room door to directly block the cable room door.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The patent protection scope of the present invention shall be subject to the claims. Any equivalent structural changes made using the contents of the description and drawings of the present invention, Likewise, they should all be included in the protection scope of the present invention.

Claims (10)

1. The cable chamber door interlocking structure of the upper three-station ring main unit comprises a grounding interlocking mechanism and a circuit breaker interlocking mechanism, wherein the grounding interlocking mechanism and the circuit breaker interlocking mechanism are respectively used for realizing the interlocking between a three-station disconnecting switch operating mechanism (16) and a cable chamber door (13) and between a circuit breaker operating mechanism (17) and the cable chamber door (13), and the cable chamber door (13) is an upward-lifting cable chamber door; a first transmission mechanism (2) is arranged between the grounding interlocking stop block (27) and the three-station isolating switch operating mechanism (16), and the first transmission mechanism (2) is used for enabling the grounding interlocking stop block (27) to act along with the three-station isolating switch operating mechanism (16) and is provided with an unlocking position corresponding to the grounding state of the three-station isolating switch operating mechanism (16) and a locking position corresponding to the isolating opening and isolating closing states of the three-station isolating switch operating mechanism (16); a second transmission mechanism (3) is arranged between the circuit breaker interlocking stop block (35) and the circuit breaker operating mechanism (17), and the second transmission mechanism (3) is used for enabling the circuit breaker interlocking stop block (35) to act along with the circuit breaker operating mechanism (17) and is provided with an unlocking position corresponding to a closing state of the circuit breaker operating mechanism (17) and a locking position corresponding to a separating state of the circuit breaker operating mechanism (17); the locking stop blocks are provided with blocking parts, the blocking parts are used for being located below the rotation axes of the locking stop blocks when the corresponding locking stop blocks are in locking positions and blocking on the cable chamber door (13) or a blocking piece (14) fixed on the cable chamber door (13), and when the cable chamber door (13) is lifted up, acting force passing through the rotation axes of the locking stop blocks is born to block the cable chamber door (13) from being opened; the blocking part is used for avoiding the cable chamber door (13) or the blocking piece (14) to unlock the cable chamber door (13) when the corresponding interlocking block is in an unlocking position.

2. The cable chamber door interlocking structure of the upper three-station ring main unit according to claim 1, wherein the bottommost side surface of the locking stop block is an arc-shaped surface, the blocking part is positioned on the arc-shaped surface, and the rotation axis of the arc-shaped surface is parallel to the rotation axis of the locking stop block.

3. The cable chamber door interlocking structure of the upper three-station ring main unit according to claim 1, wherein the grounding interlocking block (27) and the circuit breaker interlocking block (35) are rotatably assembled on the same rotating shaft.

4. A cable room door interlock structure of a three-station ring main unit according to any one of claims 1 to 3, characterized in that the first transmission mechanism (2) comprises a ground transmission link (26) hinged on the ground interlock block (27), the second transmission mechanism (3) comprises a breaker transmission link (32) hinged on a breaker interlock block (35), both ends of the ground transmission link (26) and the breaker transmission link (32) are provided with hinge structures for forming a link mechanism to realize driving of the ground interlock block (27) and the breaker interlock block (35).

5. The cable chamber door interlock structure of the upper three-station ring main unit according to claim 4, wherein the ground interlock stop (27) and the circuit breaker interlock stop (35) each comprise two side arms arranged in an L-shape; the hinge joint of the grounding interlocking block (27) and the corresponding connecting rod and the blocking part of the grounding interlocking block (27) are respectively positioned on two side arms on the grounding interlocking block (27), and the hinge joint of the circuit breaker interlocking block (35) and the corresponding connecting rod and the blocking part of the circuit breaker interlocking block (35) are respectively positioned on two side arms of the circuit breaker interlocking block (35).

6. The cable chamber door interlocking structure of the upper three-station ring main unit according to claim 5, wherein the hinge part of the grounding interlocking block (27) and the hinge part of the breaker interlocking block (35) and the corresponding connecting rod are oppositely arranged at two sides of the rotation axis of the locking block.

7. The cable chamber door interlocking structure of the upper three-station ring main unit according to claim 4, further comprising an adjusting block arranged at least one end of the grounding transmission link (26) and/or the breaker transmission link (32), wherein the adjusting block is provided with a link perforation, the grounding transmission link (26) and/or the breaker transmission link (32) pass through the link perforation and are in threaded connection with two adjusting nuts, the two adjusting nuts are respectively arranged at two ends of the link perforation and used for fixing the adjusting block with the corresponding grounding transmission link (26) or the breaker transmission link (32), and the adjusting block is provided with a hinge structure which is used for realizing the hinge of the corresponding ends of the grounding transmission link (26) and/or the breaker transmission link (32).

8. The cable chamber door interlocking structure of the upper three-station ring main unit according to claim 4, wherein the first transmission mechanism (2) comprises a grounding interlocking swing arm (23) hinged on the ring main unit (1), and two ends of a grounding transmission connecting rod (26) are respectively hinged with the grounding interlocking swing arm (23) and a grounding interlocking stop block (27); the grounding interlocking swing arm (23) is connected with a reset spring (25), the first transmission mechanism (2) further comprises a swing arm limiting structure, and the swing arm limiting structure is used for limiting the swing position of the grounding interlocking swing arm (23) under the action of the reset spring (25) to correspond to the locking position of the grounding interlocking stop block (27); the first transmission mechanism (2) further comprises a toggle piece fixed on the opening and closing indication shaft or the opening and closing operation shaft of the three-station isolation switch operating mechanism (16), the toggle piece is used for toggling the grounding interlocking swing arm (23) to drive the grounding interlocking stop block (27) to rotate to an unlocking position in the grounding action process of the three-station isolation switch operating mechanism (16), and when the three-station isolation switch operating mechanism (16) performs isolation opening and closing, the toggle piece is separated from the grounding interlocking swing arm (23).

9. The cable room door interlocking structure of the upper three-station ring main unit according to claim 8, wherein the poking piece comprises a poking pin shaft (22) for poking a grounding interlocking swing arm (23) and fixed on a switch-on/switch-off indication shaft, and the end face of the poking plate (21) is provided with the poking pin shaft (21).

10. The cable room door interlocking structure of the upper three-station ring main unit according to claim 4, wherein the second transmission mechanism (3) comprises a breaker interlocking crank arm (31), the breaker interlocking crank arm (31) is in transmission connection with a switching-on/off indication shaft or a switching-on/off operation shaft of the breaker operation mechanism (17), two ends of a breaker transmission connecting rod (32) are respectively hinged with the breaker interlocking crank arm (31) and a breaker interlocking stop block (35), the breaker interlocking crank arm (31) is used for driving the breaker interlocking stop block (35) to rotate to an unlocking position through the breaker transmission connecting rod (32) in the action process of switching on the breaker operation mechanism (17), and the breaker interlocking stop block (35) is driven to rotate to a locking position through the breaker transmission connecting rod (32) in the action process of switching off the breaker operation mechanism (17).