CN110112028A - A kind of breaker single-phase module - Google Patents

Abstract

The invention discloses a circuit breaker single-phase module with a grounding function. It includes a guide shell, an incoming line pouring module and an outgoing line pouring module. The moving contact module is arranged in the guiding shell. The moving contact module includes a conductive rod and a guide plate. The guide plate divides the guide shell into air chamber I and air chamber II. The outer end of the outgoing line pouring module is provided with a grounding end cover module, and an air chamber III is formed between the outgoing line pouring module and the grounding end cover module. The incoming line pouring module includes A conductive static contact with a movable shield is installed, and the conductive rod is connected with a moving pull rod that passes through the outlet casting module and extends out of the grounding end cover module. The advantages are: simple and reliable structure, can change the outlet direction of the contact, and have diversified functions, and make the opening and closing and grounding all in the same direction of movement, greatly reducing the overall size, expanding the scope of application, reliable contact, and good flow. Very capable.

Description

A circuit breaker single-phase module

technical field

The invention relates to a circuit breaker module, in particular to a circuit breaker single-phase module with a grounding function, which belongs to the technical field of high voltage switches.

Background technique

The existing circuit breaker only has two positions of closing position and opening position. When the circuit breaker is used as an outlet, in order to ensure the safety of maintenance personnel, it is usually used in conjunction with an isolation grounding switch in the switch cabinet. The circuit breaker and isolation grounding Mechanical locking or electrical locking is used to prevent misoperation between the switches. The structure is relatively complicated, and at the same time, the overall size of the switch cabinet is too large, and the scope of application is small. In addition, the limitation of its structural design not only makes the function single, but also has the reliability of conductive connection. Very poor and poor flow capacity, especially with long-term use and wear, there will be poor contact problems, which affects the normal use of the equipment.

Contents of the invention

The technical problem to be solved by the present invention is to provide a circuit breaker single-phase module capable of changing the outlet direction of the contacts, with diversified functions, reliable contact and strong flow capacity.

In order to solve the above-mentioned technical problems, the circuit breaker single-phase module of the present invention includes a guide housing, an incoming line casting module arranged at one end of the guide housing, and an outlet casting module arranged at the other end of the guide housing. The moving contact module reciprocates between the incoming line pouring module and the outgoing line pouring module. The moving contact module includes a conductive rod with a self-supporting contact on the head and a guide plate installed on the front end of the conductive rod. A sleeve is installed on the guide plate. Outside the self-supporting contact and the outer cover with a spout, the guide plate is in sealing contact with the guide housing and can divide the guide housing into air chamber I and air chamber II. The air chamber III is formed between the casting module and the grounding end cover module. The incoming line casting module includes a conductive static contact installed with a movable shield, and the conductive rod is connected with a moving rod that passes through the outgoing line casting module and extends out of the grounding end cover module. , the moving contact module can move the shielding cover at the spout of the outer cover under the drive of the moving pull rod, and at the same time make the conductive static contact insert into the self-supporting contact.

The incoming line pouring module also includes an incoming line end epoxy resin casting body and an incoming line conductor provided in the incoming line end epoxy resin casting body, the incoming line conductor is electrically connected to the conductive static contact, and the conductive static contact Extending horizontally along the axial center of the guide housing, the conductive static contact has a return spring that cooperates with the moving shield.

The outgoing line pouring module includes an outgoing line end epoxy resin casting body and an outgoing line conductor arranged in the outgoing line end epoxy resin casting body, and the left and right sides of the outgoing line end epoxy resin casting body form a connecting case, and one side is connected to the casing It is fixedly connected with the guide shell, and the other side is connected with the cover shell and is fixedly connected with the grounding end cover module.

The ground end cover module includes a ground epoxy resin cast body and a ground contact arranged in the middle of the ground epoxy resin cast body, and the ground contact is connected to a ground bar located outside the ground epoxy resin cast body, A density relay is also installed on the epoxy resin pouring body of the grounding terminal.

The moving contact module also includes a protective shield located within the housing and mounted outside the self-acting contacts.

The moving pull rod includes an insulating pull rod, a main pull rod fixedly connected with the insulating pull rod, and an output crank arm connected to the rear end of the main pull rod through a pin.

The present invention has the following advantages: the three functions of closing, opening and grounding of the circuit breaker are realized by skillfully adopting the segmented modular assembly structure of the guide shell, the incoming line pouring module, the outgoing line pouring module and the grounding end cover module. The structure is simple and reliable, the direction of the contact can be changed, the function is diversified, and the opening and closing and grounding are all in the same direction of movement, which greatly reduces the overall size and expands the scope of application. The conductive static contact of the shielding cover, the conductive rod with self-supporting contact, the guide plate installed on the front end of the conductive rod, and the outer cover with spout installed on the guide plate, which is set outside the self-supporting contact and has a spout. At the same time, it also uses The spring contact fingers are used as a flow connection to make the contact reliable and the flow capacity is very strong.

Description of drawings

Fig. 1 is a schematic diagram of the closed state structure of the single-phase module of the circuit breaker of the present invention;

Fig. 2 is a schematic structural diagram of the opening state of the single-phase module of the circuit breaker of the present invention;

Fig. 3 is a schematic diagram of the grounded state structure of the single-phase module of the circuit breaker of the present invention.

Detailed ways

The single-phase module of the circuit breaker of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

As shown in the figure, the circuit breaker single-phase module of the present invention includes a guide housing 2, an incoming line casting module 1 arranged at one end of the guide housing 2, and an outlet casting module 3 arranged at the other end of the guide housing 2. The outer end of the module 3 is provided with a grounding end cover module 4. As can be seen from the figure, the incoming line casting module 1 includes the incoming line end epoxy resin casting body 102, the incoming line conductor 101 provided in the incoming line end epoxy resin casting body 102 and the installation The conductive static contact 104 of the mobile shield 103, the incoming line casting module 1 is formed by casting the incoming line conductor 101 through epoxy resin, and then assembled with the conductive static contact 104 and the mobile shield 103, the conductive static contact 104 Extending horizontally along the axial center of the guide housing 2, the conductive static contact 104 has a hollow structure. The interior of the conductive static contact 104 is equipped with a return spring that cooperates with the movable shield 103. When the movable shield 103 moves under the action of external force The return spring will be compressed, and when the external force is removed, the return spring will tend to reset the movable shield 103, the incoming conductor 101 is electrically connected to the conductive static contact 104, and the outgoing line casting module 3 includes the outgoing line end epoxy resin casting body 301 and the outgoing line The outlet conductor 302 provided in the epoxy resin casting body 301 at the terminal end, the left and right sides of the epoxy resin casting body 301 at the outlet end are all formed with a connecting casing with an inner cavity, and the connecting casing on one side is fixedly connected with the guide housing 2, and in addition One side of the connecting cover is fixedly connected to the grounding end cover module 4, and the moving contact module 5 capable of reciprocating movement between the incoming line casting module 1 and the outgoing line casting module 3 is arranged in the guide housing 2, and the moving contact module 5 includes The head has a conductive rod 505 with a self-supporting contact 502 and a guide plate 504 installed on the front end of the conductive rod 505. As can be seen from the figure, the self-supporting contact 502 and the conductive rod 505 are connected into one; The outer cover 501 with a spout outside the contact 502, the guide plate 504 and the guide housing 2 are sealed and contacted by the guide seal ring 506, and the guide housing 2 can be divided into the air chamber I and the air chamber II. The connection cover on the left side of the resin casting body 301 is fixedly connected to the guide housing 2, so the volume of the air chamber II expands into the inner cavity formed by the connection cover on the left side, and the connection cover on the right side of the outlet casting module 3 The air chamber III is formed between the inner chamber of the inner chamber and the grounding end cover module 4, and the conductive rod 505 is connected with the moving rod 6 which passes through the outlet pouring module 3 and extends out of the grounding end cover module 4, and the moving contact module 5 is in the position of the moving rod Driven, the spout of the outer cover 501 can be pushed to move the shielding cover 103, and at the same time, the conductive static contact 104 can be inserted into the self-supporting contact.

Further, said moving pull rod 6 includes an insulating pull rod 601, a main pull rod 602 fixedly connected to the insulating pull rod 601, and an output crank arm 604 connected to the rear end of the main pull rod 602 through a pin 603; The tie rod head 605 is set, and the ground end cover module 4 includes a ground epoxy resin cast body 401 and a ground contact 402 arranged in the middle of the ground epoxy resin cast body 401. The ground contact 402 is connected with a ground epoxy resin The grounding bar 403 outside the casting body 401, the moving rod 6 passes through the inner cavity of the grounding contact 402 to cooperate with the grounding contact 402, and the epoxy resin casting body 401 at the grounding end is also installed with a guide sleeve 404, a density relay 405, and a density relay 405 is installed on the outside of the epoxy resin casting body 401 at the grounding end. The grounding end cover module 4 molds the grounding contact 402 and the guide sleeve 404 through epoxy resin, and the grounding end spring that cooperates with the main tie rod 602 is arranged in the grounding contact 402 The contact finger 407 and the guide sleeve sealing ring 406 that cooperate with the main pull rod 602 are arranged in the guide sleeve 404 .

Still further, said moving contact module 5 also includes a protective shield 503 located in the outer cover 501 and installed outside the self-supporting contact 502. In addition, the outlet conductor 302 of the outlet casting module 3 is provided with a The spring contact finger 303 at the outlet end of the cable can also be provided with a shielding layer on the outer surface of the guide housing, the incoming line casting module, the outgoing line casting module and the grounding end cover module. The outer surface can be touched, which can achieve maintenance-free or less maintenance. When assembling , the incoming line pouring module 1, the guide housing 2, the outgoing line pouring module 3, and the grounding end cover module 4 are sequentially connected by bolts and sealing rings, after the assembly of the moving contact module 5 and the moving tie rod 6 without the tie rod head 605 It needs to be loaded into the guide housing 2 in advance. After the assembly is completed, the air chambers I, II, and III are formed. The air chambers are filled with sulfur hexafluoride insulating medium. The mobile shield 103 plays the role of uniform electric field in the process of closing and opening. On the one hand, the nozzle of the outer cover 501 can prevent the arc from splashing on the inner wall of the guide housing 2, and on the other hand, it can also control the flow direction of the airflow, so that the arc is extinguished during the opening and closing process, and the effect is outstanding.

It works as follows:

When the present invention is in the opening position (isolation position) shown in Fig. 2, when the operating mechanism sends out the switch closing signal, the output crank arm 604 rotates clockwise to quickly drive the moving contact module 5 to move quickly to the left. , the top of the spout of the outer cover 501 will push the mobile shield 103 to move to the left, and at the same time, the conductive static contact 104 is inserted into the self-supporting contact 502 until the position shown in Figure 1. At this time, the incoming line contact 101 (incoming line conductor), conductive The static contact 104, the self-supporting contact 502, the conductive rod 505, the spring contact finger 303 at the outgoing line end, and the outgoing line contact 302 (the outgoing line conductor) form a closing flow circuit.

When the present invention is in the closing position shown in Fig. 1, when the operating mechanism sends out the switch opening signal, the output crank arm 604 rotates counterclockwise, and rapidly drives the moving contact module 5 to move to the right quickly. During this process, the moving shield The cover 103 moves to the right and resets under the action of the return spring. At the same time, the self-operated contact 502 will separate from the conductive static contact 104 during the movement. At the moment of separation, an arc will be generated between the two. During the opening movement, II The volume of the chamber becomes smaller, the internal gas is compressed, and the compressed gas passes through the vent hole on the guide plate 504, and blows to the arc through the mouth of the nozzle of the outer cover 501 to accelerate the extinguishment of the arc when it crosses zero. When the moving contact module 5 moves to the opening position (isolated position) in FIG. 2 , the opening process ends. At this time, the incoming line contact 101 and the outgoing line contact 302 (outgoing line conductor) are electrically disconnected, and the outgoing line contact 302 is also electrically disconnected from the ground bar.

When the present invention is in the opening position (isolation position) shown in Figure 2, when the operating mechanism sends a grounding closing signal, the output crank arm 604 rotates counterclockwise, and the moving pull rod 6 drives the moving trigger under the drive of the output crank arm 604. Slide the head module 5 to the right until it reaches the grounding position shown in Figure 3. At this time, the outlet contact 302 (outlet conductor), the spring contact finger 303 at the outlet end, the conductive rod 505, the spring contact finger 407 at the ground end, and the ground contact 401 And the ground bar 403 constitutes a ground function loop.

Claims (6)

1. A circuit breaker single-phase module, characterized in that it includes a guide housing (2), an incoming line pouring module (1) arranged at one end of the guide housing (2) and an The outgoing line pouring module (3), the guide housing (2) is provided with a moving contact module (5) capable of reciprocating between the incoming line pouring module (1) and the outgoing line pouring module (3), the The moving contact module (5) includes a conductive rod (505) with a self-supporting contact (502) on the head and a guide plate (504) installed on the front end of the conductive rod (505). The guide plate (504) is equipped with The cover (501) with a spout is set outside the self-supporting contact (502), and the guide plate (504) is in sealing contact with the guide housing (2) and can divide the guide housing (2) into an air chamber I and air chamber II, the outer end of the outgoing line pouring module (3) is provided with a grounding end cover module (4), and an air chamber III is formed between the outgoing line pouring module (3) and the grounding end cover module (4), the incoming line The pouring module (1) includes a conductive static contact (104) installed with a movable shield (103), and the conductive rod (505) is connected to the pouring module (3) passing through the outgoing line and extending out of the grounding end cover module (4) The outer moving rod (6), the moving contact module (5) can push the spout of the outer cover (501) to move the shielding cover (103) under the drive of the moving rod, and at the same time insert the conductive static contact (104) Self-supporting contacts. 2. The circuit breaker single-phase module according to claim 1, characterized in that: the incoming line casting module (1) also includes the incoming line end epoxy resin casting body (102) and the incoming line end epoxy resin casting body The incoming conductor (101) arranged in (102), the incoming conductor (101) is electrically connected with the conductive static contact (104), and the conductive static contact (104) is along the axial direction of the guide housing (2) The center extends horizontally, and the conductive static contact (104) has a return spring matched with the movable shield (103). 3. The circuit breaker single-phase module according to claim 1 or 2, characterized in that: the outgoing line casting module (3) includes an outgoing line end epoxy resin casting body (301) and an outgoing line end epoxy resin casting body (301 ), the outlet conductor (302) is set inside, the left and right sides of the epoxy resin cast body (301) at the outlet end form a connection case, one side of the connection case is fixedly connected with the guide housing (2), and the other side The connecting cover is fixedly connected with the grounding end cover module (4). 4. The circuit breaker single-phase module according to claim 3, characterized in that: the ground end cover module (4) includes a ground epoxy resin cast body (401) and an epoxy resin cast body (401) arranged on the ground end 401) The grounding contact (402) in the middle, the grounding contact (402) is connected to the grounding bar (403) located outside the grounding epoxy resin casting body (401), the grounding epoxy resin casting body A density relay (405) is also installed on (401). 5. The circuit breaker single-phase module according to claim 1, 2 or 4, characterized in that: the moving contact module (5) also includes a self-powered contact (502) located in the outer cover (501) Outer protective shield (503). 6. The circuit breaker single-phase module according to claim 5, characterized in that: the moving rod (6) includes an insulating rod (601), a main rod (602) fixedly connected to the insulating rod (601), and a pin (603) is connected to the output crank arm (604) at the rear end of the main tie rod (602).