Mechanical automatic tripping type switching-on and switching-off locking holding mechanism of circuit breaker

Abstract

The invention relates to the technical field of circuit breaker opening and closing structures, in particular to a circuit breaker mechanical automatic tripping type opening and closing locking holding mechanism which comprises a middle shaft driving rod with a moving contact installed at the front end, and further comprises an opening / closing holding block, an opening / closing locking mechanism, a locking mechanism, a locking mechanism and a locking mechanism, wherein the opening / closing holding block is provided with an embedding and clamping groove and coaxially installed on a rod body of the middle shaft driving rod; the driving part comprises a switching-off driving head and a switching-on driving head which are arranged on the middle shaft driving rod and are positioned on the upper side and the lower side of the switching-off / switching-on retaining block; the opening / closing holding locking sliding block is mounted on the base body on one side of the opening / closing holding block through a connecting spring and is used for locking the closing driving head and the opening driving head respectively during opening / closing; mechanical locking in the opening and closing process can be achieved, kinetic energy needed for overcoming huge attraction of a permanent magnet during opening and closing motion of the circuit breaker is eliminated, and driving force needed by opening and closing motion is reduced. The power supply structure of the eddy current driving circuit breaker is simplified, and high failure rate caused by a complex high-voltage power supply board is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of the opening and closing structures of circuit breakers, and particularly relates to a mechanical automatic tripping type opening and closing locking and holding mechanism for a circuit breaker. Background Art

[0002] With the increasing requirements for reliability in the power supply system, the current opening and closing speeds provided by spring-operated mechanism circuit breakers are increasingly unable to meet user needs; and the eddy current drive mechanism powered by capacitor energy storage is also increasingly widely used. However, in the actual application process, the poor stability and reliability of the control part of the eddy current drive mechanism have become the bottleneck restricting the application of eddy current drive switches.

[0003] Specifically, during the operation of the eddy current drive switch, a power supply board is required to provide instantaneous strong power to overcome the suction force of the opening and closing permanent magnets. The driving force to be overcome is relatively large, and the power supply boost circuit is complex with poor reliability, resulting in a large instantaneous change in the opening and closing speed during the opening and closing process, that is, the opening and closing stability is poor. Therefore, it is considered to design an opening and closing structure for a circuit breaker that can replace the holding permanent magnet to reduce the driving force required for opening and closing, simplify the structure, and expect to reduce the failure rate and improve the reliability. In view of this, we propose a mechanical automatic tripping type opening and closing locking and holding mechanism for a circuit breaker. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies mentioned in the above background art and provide a mechanical automatic tripping type opening and closing locking and holding mechanism for a circuit breaker.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A mechanical automatic tripping type opening and closing locking and holding mechanism for a circuit breaker, including a central axis drive rod with a moving contact installed at the front end, and further including:

[0007] An opening / closing holding block, provided with an embedding slot and coaxially installed on the rod body of the central axis drive rod;

[0008] A driving part, including a tripping driving head and a closing driving head arranged on the central axis drive rod and located on the upper and lower sides of the opening / closing holding block, and the tripping driving head and the closing driving head are provided with an eddy current power source for providing opening / closing power;

[0009] An opening / closing holding and locking slider, installed at one side base of the opening / closing holding block through a connecting spring, and used for locking the closing driving head and the tripping driving head respectively during opening / closing.

[0010] Preferably, a limit stop disk and a closing stroke limit stop disk are installed on the central axis drive rod, and an opening and closing distance is provided between the limit stop disk and the closing stroke limit stop disk;

[0011] A closing-opening stroke baffle for limiting is fixedly installed between the limiting stop disk and the closing stroke limiting stop disk.

[0012] Preferably, a tripping eddy current disk and a closing eddy current disk are respectively installed on the tripping drive head and the closing drive head.

[0013] Preferably, a tripping coil body is installed at a corresponding position of the tripping eddy current disk through a tripping coil support plate;

[0014] An eddy current power source for tripping is generated between the tripping coil body and the tripping eddy current disk.

[0015] Preferably, a closing coil body is installed at a corresponding position of the closing eddy current disk through a closing coil support plate;

[0016] An eddy current power source for closing is generated between the closing coil body and the closing eddy current disk.

[0017] Preferably, a tripping return spring and a closing return spring are respectively installed between the tripping drive head, the closing drive head and the closing-opening holding block.

[0018] Preferably, a shovel-shaped slope surface is provided on both sides of the tripping drive head and the closing drive head close to the closing-opening holding lock slider side;

[0019] A slope-shaped abutting surface that fits with the shovel-shaped slope surface is provided on the closing-opening holding lock slider.

[0020] Preferably, a clamping groove that is inserted and matched with the insertion card groove is provided on the closing-opening holding lock slider.

[0021] Preferably, a DC220V power supply board for providing the power required for the opening and closing actions of the circuit breaker is installed on both the tripping coil body and the closing coil body.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The mechanical automatic tripping type opening and closing locking and holding mechanism of the circuit breaker can realize mechanical locking during the opening and closing processes, and can complete the opening and closing actions of the circuit breaker with eddy current driving force, eliminating the kinetic energy required to overcome the huge holding suction force of the permanent magnet during the opening and closing movements of the circuit breaker, and reducing the driving force required for the opening and closing actions;

[0024] 2. The power supply structure of the eddy current-driven circuit breaker is streamlined, and the opening and closing actions of the circuit breaker can be realized through the DC220V power supply board, without the need for a complex circuit for boosting voltage, avoiding the high failure rate caused by the complex high-voltage power supply board, greatly improving the action reliability of the circuit breaker, facilitating on-site operation and maintenance, and reducing the failure rate. Brief Description of the Drawings

[0025] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0026] Figure 1 is a schematic diagram of closing lock for an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of opening lock for an embodiment of the present invention;

[0028] Figure 3 for the present invention Figure 1 is a partially enlarged schematic diagram of part A in;

[0029] Figure 4 for the present invention Figure 2 is a partially enlarged schematic diagram of part B in.

[0030] The meanings of the various reference numerals in the drawings are as follows:

[0031] 101, conductive plate; 102, static contact; 103, moving contact; 104, conductive clamp; 105, insulating pull rod; 106, central axis drive rod; 107, opening stroke limit stop disk;

[0032] 108, opening coil support plate; 109, opening coil body; 110, opening eddy current disk; 111, opening drive head; 112, opening return spring;

[0033] 113, opening / closing holding lock slider; 1131, sloping contact surface; 1132, clamping groove; 114, opening / closing holding block; 1141, embedding groove; 115, connecting spring; 116, closing return spring; 117, closing drive head; 118, closing eddy current disk; 119, closing coil body; 120, closing coil support plate; 121, closing stroke limit stop disk; 1111, connecting groove; 1112, shovel-shaped slope; 122, opening / closing stroke baffle. Detailed Description of the Invention

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0035] Please refer to Figures 1-4, the present invention details the above technical solution through the following embodiments:

[0036] The mechanical automatic tripping type opening and closing locking and holding mechanism of the circuit breaker in this embodiment, as Figure 1 , Figure 2 shown in the structure, includes a central axis drive rod 106 with a moving contact 103 installed at the front end. An insulating pull rod 105 and a conductive clip 104 are provided on the central axis drive rod 106. This part of the structure belongs to the existing circuit breaker structure, so no further description will be given. The corresponding conductive part for opening and closing is a conductive plate 101 with a static contact 102 installed. The opening and closing process is to achieve the opening and closing actions of the static contact 102 and the moving contact 103. Specifically, it also includes:

[0037] An opening / closing holding block 114, as Figure 2 and Figure 4 shown in the structure. The opening / closing holding block 114 in this embodiment is a convex structure fixedly connected to the rod body of the central axis drive rod 106, and is provided with an embedded card slot 1141 at the position shown in Figure 4 .

[0038] A driving part, as Figure 1 and Figure 2 shown in the positional relationship, includes a tripping driving head 111 and a closing driving head 117 provided on the central axis drive rod 106. In this embodiment, the tripping driving head 111 and the closing driving head 117 are symmetrically arranged on the upper and lower sides of the opening / closing holding block 114. In order to obtain a reset function, as Figure 3 shown in the structure, connecting grooves 1111 are provided on both the tripping driving head 111 and the closing driving head 117. Connecting springs 115 are respectively installed at the connecting grooves 1111 and connected to the opening / closing holding block 114, for providing a reset acting force during the opening and closing process.

[0039] It should be explained that, in order to achieve the limit during the opening and closing driving process, as Figure 1 , Figure 2 shown in the structure, a limit stop disk 107 with an opening and closing spacing and a closing stroke limit stop disk 121 are installed on the central axis drive rod 106. A opening and closing stroke baffle 122 for limiting is fixedly installed between the limit stop disk 107 and the closing stroke limit stop disk 121.

[0040] In this embodiment, the tripping driving head 111 and the closing driving head 117 are as Figure 1 and Figure 2As shown, a tripping eddy current disk 110 and a closing eddy current disk 118 are respectively installed on the tripping drive head 111 and the closing drive head 117. In order to drive the tripping drive head 111 and the closing drive head 117 to move through the eddy current driving force, the tripping coil body 109 is fixedly installed through the tripping coil support plate 108, and the closing coil body 119 is fixedly installed through the closing coil support plate 120.

[0041] That is, an eddy current power for tripping can be generated between the tripping coil body 109 and the tripping eddy current disk 110, and an eddy current power for closing can be generated between the closing coil body 119 and the closing eddy current disk 118; Figure 2 For the tripping state, in order to obtain Figure 1 the closing state, it is necessary to push up the closing drive head 117 partially through the eddy current repulsive force generated between the closing coil body 119 and the closing eddy current disk 118.

[0042] It should be noted that as shown in Figure 3 and Figure 4 the structure, shovel-shaped slopes 1112 are provided on both sides of the tripping drive head 111 and the closing drive head 117 close to the tripping / closing holding and locking slider 113, and a sloping abutting surface 1131 that fits the shovel-shaped slope 1112 is provided on the tripping / closing holding and locking slider 113. When the closing drive head 117 is pushed up partially, it will cause the tripping / closing holding and locking slider 113 installed with the connecting spring 115 to compress the spring outward, that is, to separate the clamping groove 1132 of the tripping / closing holding and locking slider 113 clamped in the embedded clamping groove 1141, so that after the locking and holding state is released, the closing drive head 117 drives the central axis drive rod 106 to move upward to achieve closing. This process will form Figures 2 to 1 a variable stroke, in which when the central axis drive rod 106 moves upward for closing, the corresponding tripping / closing holding and locking slider 113 on the upper side will be clamped into the embedded clamping groove 1141 again to form a locking state during closing.

[0043] In this embodiment, DC220V power supply boards are installed on both the tripping coil body 109 and the closing coil body 119 to provide power to generate eddy current repulsive force. The design of this part of the power supply belongs to the prior art, so no more description will be given.

[0044] Specifically, the working principle of the mechanical automatic tripping and closing locking and holding mechanism of the circuit breaker in this embodiment is as follows: Eddy current magnetic fields are generated by the discharge of the tripping coil body 109 and the closing coil body 119 respectively. The corresponding tripping eddy current disk 110 and closing eddy current disk 118 can sense the eddy current and generate repulsive force, and then drive the tripping drive head 111 and the closing drive head 117 to move up and down.

[0045] After the opening drive head 111 and the closing drive head 117 move to the predetermined positions, they push the opening / closing holding and locking slider 113. The opening / closing holding and locking slider 113 moves horizontally, the connecting spring 115 is compressed or released, and the opening / closing holding and locking slider 113 locks the opening / closing holding block 114. During this process, the shaft drive rod 106 completes the movement, realizing the opening and closing actions and position holding of the circuit breaker.

[0046] When the opening / closing action is completed, the energy of the compressed connecting spring 115 is released, automatically resetting the opening drive head 111, the closing drive head 117, and the opening eddy current disk 110 and the closing eddy current disk 118 connected thereto to the opening coil body 109 and the closing coil body 119, preparing for the next opening / closing action.

[0047] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

Claims

1. A circuit breaker mechanical automatic tripping type opening and closing locking and holding mechanism, comprising a central shaft driving rod (106) with a moving contact (103) installed at the front end, characterized in that: Also includes: An opening / closing holding block (114) is provided with an embedding groove (1141) and is coaxially mounted on the rod body of the central axis driving rod (106); A driving part, comprising an opening drive head (111) and a closing drive head (117) which are arranged on the central axis driving rod (106) and located at the upper and lower sides of the opening / closing holding block (114); the opening drive head (111) and the closing drive head (117) are provided with an eddy current power source for providing opening / closing power; The opening / closing holding locking slide block (113) is installed on a base body on one side of the opening / closing holding block (114) via a connecting spring (115) and is used to respectively lock the closing drive head (117) and the opening drive head (111) during opening / closing.

2. The circuit breaker mechanical automatic tripping opening and closing locking and holding mechanism according to claim 1, characterized in that: A limit stop disk (107) and a closing stroke limit stop disk (121) are installed on the central shaft driving rod (106), and a closing and opening distance is provided between the limit stop disk (107) and the closing stroke limit stop disk (121); A closing and opening stroke baffle (122) for limiting is fixedly installed between the limit stop disk (107) and the closing stroke limit stop disk (121).

3. The circuit breaker mechanical automatic tripping opening and closing locking and holding mechanism according to claim 2, characterized in that: The opening drive head (111) and the closing drive head (117) are respectively provided with an opening eddy current disc (110) and a closing eddy current disc (118).

4. The circuit breaker mechanical automatic tripping opening and closing locking and holding mechanism according to claim 3, characterized in that: A gate-opening coil body (109) is installed at a position corresponding to the gate-opening eddy current disc (110) via a gate-opening coil support plate (108); An eddy current power source for opening the gate is generated between the opening gate coil body (109) and the opening gate eddy current disk (110).

5. The circuit breaker mechanical automatic tripping type opening and closing locking and holding mechanism according to claim 4, characterized in that: A closing coil body (119) is installed at a position corresponding to the closing eddy current disk (118) via a closing coil support plate (120); An eddy current power source for closing the circuit is generated between the closing coil body (119) and the closing eddy current disk (118).

6. The circuit breaker mechanical automatic tripping opening and closing locking and holding mechanism according to claim 1, characterized in that: An opening reset spring (112) and a closing reset spring (116) are respectively installed between the opening drive head (111), the closing drive head (117) and the opening / closing holding block (114).

7. The circuit breaker mechanical automatic tripping opening and closing locking and holding mechanism according to claim 6, characterized in that: The opening drive head (111) and the closing drive head (117) are both provided with a shovel-shaped slope surface (1112) on the side close to the opening / closing holding locking slide block (113); The opening / closing retaining locking slide block (113) is provided with a slope-shaped abutment surface (1131) that matches the shovel-shaped slope surface (1112).

8. The circuit breaker mechanical automatic tripping opening and closing locking and holding mechanism according to claim 7, characterized in that: The opening / closing retaining locking slide block (113) is provided with a clamping groove (1132) that is inserted and matched with the embedded clamping groove (1141).

9. The circuit breaker mechanical automatic tripping opening and closing locking and holding mechanism according to claim 5, characterized in that: The opening coil body (109) and the closing coil body (119) are both equipped with a DC220V power supply board for providing power required for the opening and closing actions of the circuit breaker.

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