Contact linkage device of small reclosing circuit breaker
By setting a linkage shaft in the contact linkage device of the small reclosing circuit breaker, the L-pole switch connecting block and the N-pole switch connecting block are connected in the same line, which solves the problem that the L-pole cannot carry the N-pole contact to achieve linkage opening and closing, reducing the space occupation of the N-pole contact mechanism and providing greater space selectivity.
Patent Information
- Application Number
- CN202323359442.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-09
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2033-12-09
AI Technical Summary
In the contact linkage devices of existing small reclosing circuit breakers, the L-pole cannot carry N-pole contacts to achieve linkage opening and closing, and the N-pole contact mechanism occupies a large space, which affects the space selection of the circuit board gear set.
A contact linkage device for a small reclosing circuit breaker is designed. By setting up a linkage shaft, the L-pole switch connecting block and the N-pole switch connecting block are on the same line. Through the coordination of the operating handle and the pull rod, the L-pole switch connecting block and the N-pole contact are realized.
The synchronous linkage opening and closing of the L-pole with N-pole contacts is realized, reducing the space occupation of the N-pole contact mechanism and providing greater space selectivity for the placement of the circuit board gear set.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reclosing circuit breakers, in particular to a contact linkage device of a small reclosing circuit breaker. Background Art
[0002] According to the needs of my country's power supply network intelligence, the State Grid Corporation requires the power supply network to be intelligent. Therefore, the terminal actuator of the power supply network, the small circuit breaker (or miniature circuit breaker), executes the upper end signal and has the functions of tripping and closing. Therefore, the current development trend of small circuit breakers is that in addition to the traditional manual opening and closing and over-current short-circuit automatic tripping functions, they also need to have automatic opening and closing and reclosing functions to achieve remote control; especially in combination with smart meters, the functions of automatic tripping and power-off for arrears and automatic closing and power supply for charging can be realized.
[0003] The L pole of the contact linkage device of the existing small reclosing circuit breaker cannot realize linkage opening and closing with the N pole contact, and the traditional independent opening and closing N pole contact mechanism occupies a large space, and it is impossible to select the optimal space for the placement of the circuit board gear set. Therefore, a contact linkage device of a small reclosing circuit breaker is needed to improve the above problems. Utility Model Content
[0004] The utility model aims to provide a contact linkage device for a small reclosing circuit breaker to solve the problems raised in the above-mentioned background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A contact linkage device for a small reclosing circuit breaker comprises a shell, an inner cavity side wall of the shell is rotatably connected to a support shaft through a connecting hole, a first mounting column and a second mounting column are correspondingly installed on the outer wall of the support shaft and on the front and rear sides, a connecting block is installed on the outer wall of the first mounting column and the second mounting column, the two connecting blocks are connected by an operating handle, a pull rod is installed on the side wall of the second mounting column, an L-pole opening linkage block is installed on the other end of the pull rod, an L-pole contact is provided at the lower end of the L-pole opening linkage block, a linkage shaft is installed on the side wall of the L-pole opening linkage block, an N-pole opening linkage block is installed on the other end of the linkage shaft, and an N-pole contact is installed at the lower end of the opening.
[0007] As a preferred solution of the utility model, an N-pole metal contact strip and an L-pole metal contact strip are correspondingly installed on the inner cavity side wall and on the front and rear sides of the shell.
[0008] As a preferred solution of the present invention, an opening is provided on the side wall of the shell and corresponds to the connection block, and the connection block extends through the opening to the outside of the shell.
[0009] As a preferred solution of the utility model, the L-pole opening linkage block and the N-pole opening linkage block are on the same straight line, and the N-pole metal contact strip and the L-pole metal contact strip are on the same straight line.
[0010] As a preferred solution of the utility model, the inner cavity side wall of the shell is rotatably connected to the other end of the support shaft through a connecting hole.
[0011] As a preferred solution of the utility model, the pull rod is arranged in an L-shaped structure, the L-pole contact and the N-pole contact are arranged in an arc-shaped structure, and the installation angles of the L-pole contact and the N-pole contact are the same.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] In the utility model, a linkage shaft is set in a contact linkage device of a small reclosing circuit breaker, and the operating handle is pulled left or right to move the connecting block, and the connecting block drives the second mounting column to rotate on the inner wall of the shell with the supporting shaft. The second mounting column drives the L-pole opening rotating block to move through the pull rod transmission, and the L-pole opening linkage block and the N-pole opening linkage block are connected and linked by the linkage shaft, and the L-pole opening linkage block drives the N-pole contact to achieve linkage opening and closing. The problem that the L-pole of the existing contact linkage device cannot achieve linkage opening and closing with the N-pole contact is solved by setting the linkage shaft, etc., thereby ensuring the synchronization of the N-pole contact and greatly reducing the space occupied by the N-pole contact mechanism, and providing greater space selectivity for the placement of the gear group of the rear circuit board. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the cutaway structure of the utility model;
[0015] Figure 2 It is a partial three-dimensional structural schematic diagram of the utility model;
[0016] Figure 3 It is a rear-view stereoscopic structural schematic diagram of the utility model;
[0017] Figure 4 It is a schematic diagram of the front three-dimensional structure of the utility model.
[0018] In the figure: 1. shell; 2. support shaft; 3. first mounting column; 4. second mounting column; 5. connection block; 6. operating handle; 7. pull rod; 8. L-pole opening linkage block; 9. L-pole contact; 10. linkage shaft; 11. N-pole opening linkage block; 12. N-pole contact; 13. N-pole metal contact strip; 14. L-pole metal contact strip; 15. opening. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0020] Example: See Figure 1-4 A contact linkage device for a small reclosing circuit breaker shown in the figure comprises a housing 1, a support shaft 2 is rotatably connected to the inner cavity side wall of the housing 1 through a connecting hole, a first mounting column 3 and a second mounting column 4 are correspondingly installed on the outer wall of the support shaft 2 and on the front and rear sides, a connecting block 5 is installed on the outer wall of the first mounting column 3 and the second mounting column 4, and the two connecting blocks 5 are connected by an operating handle 6, a pull rod 7 is installed on the side wall of the second mounting column 4, an L-pole opening linkage block 8 is installed at the other end of the pull rod 7, an L-pole opening linkage block 8 is provided at the lower end of the L-pole opening linkage block 8, a linkage shaft 10 is installed on the side wall of the L-pole opening linkage block 8, an N-pole opening linkage block 11 is installed at the other end of the linkage shaft 10, and an N-pole contact 9 is installed at the lower end of the opening 15. Head 12, pull the operating handle 6 to the left or right to move the connecting block 5, the connecting block 5 drives the second mounting column 4 to rotate with the support shaft 2 on the inner wall of the shell 1, and the second mounting column 4 drives the L-pole opening linkage block 8 to move through the pull rod 7. The L-pole opening linkage block 8 and the N-pole opening linkage block 11 are connected and linked by the linkage shaft 10, and the L-pole opening linkage block 8 carries the N-pole contact 12 to achieve linkage opening and closing. By setting the linkage shaft 10, the problem that the L-pole of the existing contact linkage device cannot realize linkage opening and closing with the N-pole contact 12 is solved, the synchronization of the N-pole contact 12 is ensured, and the space occupied by the N-pole contact mechanism is greatly reduced, which provides greater space selectivity for the placement of the gear group of the circuit board at the back.
[0021] In this embodiment, refer to Figure 1-4As shown, an N-pole metal contact strip 13 and an L-pole metal contact strip 14 are installed on the inner cavity side wall of the shell 1 and on the front and rear sides respectively; an opening 15 is opened on the side wall of the shell 1 and corresponds to the connecting block 5, and the connecting block 5 extends through the opening 15 to the outside of the shell 1; the L-pole disconnecting linkage block 8 and the N-pole disconnecting linkage block 11 are on the same straight line, and the N-pole metal contact strip 13 and the L-pole metal contact strip 14 are on the same straight line; the inner cavity side wall of the shell 1 is rotatably connected to the other end of the support shaft 2 through a connecting hole; the pull rod 7 is The L-shaped structure is set, and the L-pole contact 9 and the N-pole contact 12 are set in an arc structure. The installation angles of the L-pole contact 9 and the N-pole contact 12 are the same; because the installation angles of the L-pole contact 9 and the N-pole contact 12 are the same, when the L-pole opening linkage block 8 drives the L-pole contact 9 to realize opening and closing, the L-pole opening linkage block 8 drives the N-pole contact 12 through the linkage shaft 10. When the L-pole contact 9 contacts to open and close, the N-pole contact 12 also realizes opening and closing, so that the L-pole drives the N-pole contact 12 to realize linkage;
[0022] Working principle: When the contact linkage device of the small reclosing circuit breaker is in use, when closing the circuit breaker, the user pulls the operating handle 6 to the right, the operating handle 6 moves with the connecting block 5, the two connecting blocks 5 move with the second mounting column 4 and the first mounting column 3, the second mounting column 4 and the first mounting column 3 drive the support shaft 2 to rotate clockwise on the inner wall of the housing 1, the second mounting column 4 moves downward with the pull rod 7, the pull rod 7 drives the L-pole opening linkage block 8 to move downward, the L-pole opening linkage block 8 drives the L-pole contact 9 and the L-pole metal contact strip 14 to achieve closing, the L-pole opening linkage block 8 moves downward with the N-pole opening linkage block 11 under the action of the transmission of the linkage shaft 10, the N-pole opening linkage block 11 drives the N-pole contact 12 and the N-pole metal contact strip 13 to achieve closing, so that the L-pole opening linkage block 8 links the N-pole contact 12 to close the circuit; when opening the circuit breaker, the user pulls the operating handle 6 to the left, the operating handle 6 moves with the connecting block 5, the two connecting blocks 5 moves with the second mounting column 4 and the first mounting column 3, and the second mounting column 4 and the first mounting column 3 drive the support shaft 2 to rotate counterclockwise on the inner wall of the housing 1, and the second mounting column 4 moves upward with the pull rod 7, and the pull rod 7 drives the L-pole opening linkage block 8 to move upward, and the L-pole opening linkage block 8 drives the L-pole contact 9 and the L-pole metal contact strip 14 to achieve opening, and the L-pole opening linkage block 8 moves upward with the N-pole opening linkage block 11 under the action of the transmission of the linkage shaft 10, and the N-pole opening linkage block 11 drives the N-pole contact 12 and the N-pole metal contact strip 13 to achieve opening, so that the L-pole opening linkage block 8 is linked with the N-pole contact 12 to open, and the problem that the L-pole of the existing contact linkage device cannot realize linkage opening and closing with the N-pole contact 12 is solved by setting the linkage shaft 10, etc., and the synchronization of the N-pole contact 12 is ensured, and the space occupied by the N-pole contact mechanism is greatly reduced, and a greater space selectivity is provided for the placement of the gear group of the circuit board behind.
[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A contact linkage device for a small reclosing circuit breaker, comprising a housing (1) and an opening (15), characterized in that: The inner cavity side wall of the shell (1) is rotatably connected to the support shaft (2) through a connecting hole, and a first mounting column (3) and a second mounting column (4) are correspondingly installed on the outer wall of the support shaft (2) and on the front and rear sides, and a connecting block (5) is installed on the outer wall of the first mounting column (3) and the second mounting column (4), and the two connecting blocks (5) are connected through an operating handle (6), and a pull rod (7) is installed on the side wall of the second mounting column (4), and an L-pole disconnecting linkage block (8) is installed at the other end of the pull rod (7), and an L-pole contact (9) is provided at the lower end of the L-pole disconnecting linkage block (8), and a linkage shaft (10) is installed on the side wall of the L-pole disconnecting linkage block (8), and an N-pole disconnecting linkage block (11) is installed at the other end of the linkage shaft (10), and an N-pole contact (12) is installed at the lower end of the opening (15).
2. The contact linkage device of a small reclosing circuit breaker according to claim 1, characterized in that: An N-pole metal contact strip (13) and an L-pole metal contact strip (14) are correspondingly mounted on the inner cavity side wall and on the front and rear sides of the shell (1).
3. The contact linkage device of a small reclosing circuit breaker according to claim 1, characterized in that: An opening (15) is provided on the side wall of the shell (1) and corresponds to the connection block (5), and the connection block (5) extends through the opening (15) to the outside of the shell (1).
4. The contact linkage device of a small reclosing circuit breaker according to claim 2, characterized in that: The L-pole opening gate linkage block (8) and the N-pole opening gate linkage block (11) are located on the same straight line, and the N-pole metal contact strip (13) and the L-pole metal contact strip (14) are located on the same straight line.
5. The contact linkage device of a small reclosing circuit breaker according to claim 1, characterized in that: The inner cavity side wall of the shell (1) is rotatably connected to the other end of the support shaft (2) via a connecting hole.
6. The contact linkage device of a small reclosing circuit breaker according to claim 1, characterized in that: The pull rod (7) is arranged in an L-shaped structure, the L-pole contact (9) and the N-pole contact (12) are arranged in an arc-shaped structure, and the installation angles of the L-pole contact (9) and the N-pole contact (12) are the same.