Safety contactor

Abstract

The utility model relates to the technical field of contactors, in particular to a safety contactor which comprises an arc extinguishing shell, a shell cover, a static contact, a moving contact and a moving rod, the static contact is installed on the inner wall of the arc extinguishing shell, the moving rod is installed on the inner wall of the shell cover, the moving contact is fixed to the end, away from the shell cover, of the moving rod, and the moving contact is fixed to the end, away from the shell cover, of the moving rod. The shell cover is arranged on the side wall, away from the static contact, of the arc extinguishing shell in a covering mode, a blocking frame is fixed to the side wall of the shell cover, the movable rod can abut against the side wall of the blocking frame, and a driving piece is arranged on the inner wall of the shell cover and used for driving the movable rod to slide on the inner wall of the shell cover. According to the invention, when an electric arc is attached to the moving contact and approaches the shell cover along with the moving contact, the damage of the electric arc to the shell cover is reduced.

Description

Technical Field

[0001] This application relates to the technical field of contactors, and particularly to a safety contactor. Background Art

[0002] As an electrical device used to control the on / off of a circuit, the safety of a contactor directly affects the stability of the electrical device during operation. When the contactor is working, an arc is often generated inside the contactor, which increases the circuit disconnection time of the contactor and has a greater impact on the safety of the contactor.

[0003] Currently, a contactor includes a housing, a static contact, a moving contact, and an arc extinguishing piece. The static contact is fixed to the side wall of the housing, the side wall of the moving contact abuts against the side wall of the static contact, and the arc extinguishing piece is installed at a position on the inner wall of the housing close to the static contact. When the contactor is working, the side wall of the moving contact abuts against the side wall of the static contact, and an arc is generated between the static contact and the moving contact. Under the action of the arc extinguishing piece, the arc between the moving contact and the static contact is extinguished. When the contactor stops working, the moving contact moves away from the static contact, and at this time, the contactor circuit is disconnected.

[0004] When the moving contact is attached with an arc and the arc approaches the housing as the moving contact moves, the housing is easily damaged by the arc, and there is room for improvement. Summary of the Utility Model

[0005] In order to reduce the damage to the housing cover by the arc when the moving contact is attached with an arc and the arc approaches the housing cover as the moving contact moves, this application provides a safety contactor.

[0006] A safety contactor provided by this application adopts the following technical solutions:

[0007] A safety contactor includes an arc extinguishing housing, a housing cover, a static contact, a moving contact, and a moving rod. The static contact is installed on the inner wall of the arc extinguishing housing, the moving rod is installed on the inner wall of the housing cover, the moving contact is fixed to one end of the moving rod away from the housing cover, the housing cover is provided on the side wall of the arc extinguishing housing away from the static contact, a blocking frame is fixed to the side wall of the housing cover, the moving rod can abut against the side wall of the blocking frame, and a driving member is provided on the inner wall of the housing cover for driving the moving rod to slide on the inner wall of the housing cover.

[0008] By adopting the above technical solution, when using the safety contactor, the moving contact abuts against the side wall of the static contact. At this time, an arc is generated between the moving contact and the static contact, and the arc is extinguished under the action of the arc extinguishing housing. When closing the safety contactor, the driving member drives the moving rod away from the static contact, and then the side wall of the moving contact moves away from the side wall of the static contact, and at this time the circuit of the safety contactor is closed. When the output power of the driving member is too high and the moving rod slides too far away from the static contact, the side wall of the moving rod abuts against the side wall of the blocking frame, causing an arc to adhere to the moving contact. When the arc approaches the housing with the moving contact, the damage to the housing caused by the arc is reduced.

[0009] Optionally, the driving member includes a coil, a moving magnetic block and a static magnetic block. The coil is installed on the side of the blocking frame away from the static contact. The moving magnetic block is fixed to one end of the moving rod away from the moving contact. The static magnetic block is fixed to the inner wall of the housing cover. The moving magnetic block and the static magnetic block are elastically connected, and both the static magnetic block and the moving magnetic block are close to the coil.

[0010] By adopting the above technical solution, when the safety contactor is working, the coil is energized. Under the action of the coil, the moving magnetic block approaches the static magnetic block, and the moving magnetic block drives the moving rod away from the static contact. At this time, the moving contact moves away from the static contact, and the circuit of the safety contactor is disconnected. When the safety contactor stops working, under the elastic action, the moving magnetic block moves away from the static magnetic block, and the moving contact abuts against the static contact. This setting makes the process of the moving contact approaching the static contact simpler and facilitates the normal operation of the safety contactor.

[0011] Optionally, a plurality of load-bearing blocks are fixed to the side wall of the blocking frame.

[0012] By adopting the above technical solution, the gravity of the load-bearing block is applied to the blocking frame. Under the action of the load-bearing block, the blocking frame is fixed on the side wall of the housing cover, reducing the possibility of the blocking frame moving away from the housing cover.

[0013] Optionally, a plurality of clamping strips are fixed to the side wall of the blocking frame, and clamping grooves are formed in the side wall of the load-bearing block. The side wall of the clamping strip abuts against the inner wall of the clamping groove.

[0014] By adopting the above technical solution, under the clamping action of the clamping strip and the clamping groove, the load-bearing block is fixed in the width direction of the clamping strip, increasing the stability of the load-bearing block during operation.

[0015] Optionally, a safety block is installed on the side wall of the housing. The safety block is close to the blocking frame, and the side wall of the safety block can abut against the side wall of the arc extinguishing housing.

[0016] By adopting the above technical solution, when the blocking frame moves away from the housing cover, the side wall of the blocking frame abuts against the side wall of the safety block. Under the action of the safety block, the sliding of the blocking frame stops. The setting of the safety block reduces the loss of the safety contactor caused by the blocking frame when the blocking frame detaches from the housing cover.

[0017] Optionally, a safety plate is fixed to the side wall of the moving contact, and the side wall of the safety block close to the static contact abuts against the side wall of the safety plate.

[0018] By adopting the above technical solution, when the blocking frame moves away from the shell cover, the blocking frame drives the safety block to slide towards the static contact. At this time, the side wall of the safety block abuts against the side wall of the moving contact, and the safety block drives the moving contact to slide towards the static contact. The side wall of the moving contact abuts against the side wall of the static contact, further reducing the loss of the safety contactor caused by the blocking frame when the blocking frame detaches from the shell cover.

[0019] Optionally, a blocking block is fixed to one end of the moving rod close to the static contact.

[0020] By adopting the above technical solution, when the sliding distance of the moving rod towards the static contact exceeds the normal distance, under the blocking action of the blocking block, both the moving contact and the moving rod move away from the arc extinguishing housing, reducing the possibility of housing damage and increasing the service life of the housing.

[0021] Optionally, a plurality of support bars are fixed to one side of the blocking frame close to the static contact, and the side wall of the support bar abuts against the side wall of the safety block.

[0022] By adopting the above technical solution, the arrangement of the support bars shortens the abutting distance between the blocking frame and the safety block, increasing the safety distance of the safety contactor.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When the safety contactor is working, the driving member drives the moving rod to move close to and away from the static contact. At this time, the moving rod drives the moving contact to move away from the static contact, and the circuit of the safety contactor is disconnected. When the safety contactor stops working, the side wall of the moving contact abuts against the side wall of the static contact, and an arc is generated between the moving contact and the static contact. Under the arc extinguishing action of the arc extinguishing housing, the arc is extinguished. When the output power of the driving member is too high, the moving contact slides away from the static contact. At this time, the side wall of the moving rod abuts against the side wall of the blocking frame. This setting realizes that when there is an arc attached to the moving contact and the arc approaches the shell cover with the moving contact, the damage to the shell cover caused by the arc is reduced.

[0025] 2. The gravity of the load block is applied to the side wall of the blocking frame. Under the action of the gravity of the load block, the blocking frame is fixed to the side wall of the shell cover. The setting of the load block increases the stability of the safety contactor during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is an overall structural schematic diagram of a safety contactor in an embodiment of the present application.

[0027] Figure 2It is a schematic structural diagram of the arc extinguishing housing and the housing cover in the embodiment of the present application.

[0028] Figure 3 It is a schematic internal structure diagram of the driving member in the embodiment of the present application.

[0029] Reference numerals: 1, arc extinguishing housing; 2, housing cover; 3, static contact; 4, moving contact; 5, moving rod; 6, blocking frame; 7, driving member; 71, coil; 72, moving magnetic block; 73, static magnetic block; 8, load block; 9, clamping strip; 10, clamping groove; 11, safety block; 12, safety plate; 13, blocking block; 14, support strip; 15, air guide pipe; 16, auxiliary contact; 17, convex block. Detailed implementation manners

[0030] The following will Figures 1-3 make a further detailed description of the present application.

[0031] The embodiment of the present application discloses a safety contactor.

[0032] Referring to Figure 1 , a safety contactor includes an arc extinguishing housing 1, a housing cover 2 and a static contact 3. The static contact 3 is installed on the side of the arc extinguishing housing 1 away from the housing cover 2. In the embodiment of the present application, an air guide pipe 15 is further fixed on the side wall of the arc extinguishing housing 1. The air guide pipe 15 is fixed on the side of the arc extinguishing housing 1 away from the housing cover 2. The gap formed by the arc extinguishing housing 1 and the housing cover 2 is communicated with the air guide pipe 15. When an arc is generated inside the safety contactor, the arc heats the gas in the gap, and the expanded gas is discharged from the air guide pipe 15. The setting of the air guide pipe 15 increases the safety of the safety contactor during operation.

[0033] In the embodiment of the present application, an auxiliary contact 16 and a convex block 17 are further fixed on the side wall of the arc extinguishing housing 1. Preferably, there are two auxiliary contacts 16 and two convex blocks 17. The two auxiliary contacts 16 are close to each other, and the two convex blocks 17 are located on both sides of the arc extinguishing housing 1. The setting of the auxiliary contact 16 increases the functionality of the safety contactor, and the setting of the convex block 17 facilitates the staff to grab, making the installation process of the safety contactor easier.

[0034] Referring to Figure 2 and Figure 3, a driving member 7 is provided on the inner wall of the housing cover 2. The driving member 7 includes a coil 71, a static magnetic block 73, and a moving magnetic block 72. Among them, both the static magnetic block 73 and the coil 71 are fixed to the side wall of the housing cover 2. The static magnetic block 73 is located in the middle of the coil 71, and the moving magnetic block 72 is elastically connected to the static magnetic block 73. In the embodiment of the present application, the moving magnetic block 72 is connected to the static magnetic block 73 through a reaction spring. When the safety contactor works, the coil 71 is energized, and the moving magnetic block 72 approaches the static magnetic block 73. At this time, the reaction spring is compressed. When the safety contactor stops working, under the elastic force of the reaction spring, the moving magnetic block 72 moves away from the static magnetic block 73, which is convenient for the operation of the safety contactor.

[0035] A moving rod 5 is fixed to the inner wall of the moving magnetic block 72. One end of the moving rod 5 away from the moving magnetic block 72 is fixed with a moving contact 4. The side wall of the moving contact 4 away from the moving magnetic block 72 abuts against the side wall of the static contact 3. A blocking frame 6 is fixed to the side wall of the housing cover 2. One end of the moving rod 5 away from the moving magnetic block 72 is fixed with a blocking block 13. When the moving rod 5 slides towards the static contact 3, the side wall of the blocking block 13 can abut against the side wall of the arc extinguishing housing 1. When the moving rod 5 slides away from the static contact 3, the side wall of the moving contact 4 away from the static contact 3 can abut against the side wall of the blocking frame 6. The settings of the blocking frame 6 and the blocking block 13 reduce the influence of the moving rod 5 on the safety contactor when the sliding distance of the moving rod 5 exceeds the normal range.

[0036] Refer to Figure 2 , a plurality of clamping strips 9 are fixed to the side wall of the blocking frame 6. In the embodiment of the present application, preferably two clamping strips 9 are provided. A load-bearing block 8 is fixed to the side wall of the clamping strip 9. A clamping groove 10 is formed in the side wall of the load-bearing block 8. The side wall of the clamping strip 9 abuts against the inner wall of the clamping groove 10. When the safety contactor works, the gravity of the load-bearing block 8 is applied to the side wall of the blocking frame 6, so that the blocking frame 6 is fixed to the side wall of the housing cover 2. The setting of the load-bearing block 8 increases the stability of the safety contactor during operation.

[0037] A safety plate 12 is fixed to the side wall of the moving contact 4. A safety block 11 is installed on the side wall of the safety plate 12. The side wall of the safety block 11 abuts against the side wall of the blocking frame 6. A support strip 14 is fixed to the side wall of the blocking frame 6 of the safety block 11 away from the moving contact 4. The side wall of the support strip 14 abuts against the side wall of the safety block 11 away from the static contact 3. When the blocking frame 6 moves away from the housing cover 2, the support strip 14 drives the safety block 11 to slide towards the static contact 3. Subsequently, the side wall of the safety block 11 abuts against the inner wall of the arc extinguishing housing 1, and the moving contact 4 slides towards the static contact 3 under the drive of the safety plate 12. Subsequently, the side wall of the blocking block 13 abuts against the inner wall of the arc extinguishing housing 1. Under the combined action of the blocking block 13 and the safety block 11, the damage to the safety contactor during the process of the blocking frame 6 detaching from the housing cover 2 is reduced.

[0038] The implementation principle of a safety contactor in an embodiment of this application is as follows: When the safety contactor is operating, the coil 71 is energized, and the moving magnetic block 72 is subjected to a force in the magnetic field generated by the coil 71. The moving magnetic block 72 slides in the direction of the static magnetic block 73. At this time, the moving magnetic block 72 drives the moving rod 5 to slide. When the sliding distance of the moving magnetic block 72 exceeds the normal range, the safety block 11 abuts against the support bar 14. At this time, under the action of the safety block 11, the moving contact 4 moves away from the blocking frame 6. This setting achieves that when an electric arc adheres to the moving contact 4 and the electric arc approaches the housing cover 2 along with the moving contact 4, the damage to the housing cover 2 caused by the electric arc is reduced.

[0039] The above are all preferred embodiments of this application. The protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A safety contactor, characterized in that: It includes an arc extinguishing housing (1), a housing cover (2), a static contact (3), a moving contact (4), and a moving rod (5). The static contact (3) is installed on the inner wall of the arc extinguishing housing (1), the moving rod (5) is installed on the inner wall of the housing cover (2), the moving contact (4) is fixed to one end of the moving rod (5) away from the housing cover (2), the housing cover (2) covers the side wall of the arc extinguishing housing (1) away from the static contact (3), a blocking frame (6) is fixed to the side wall of the housing cover (2), the moving rod (5) can abut against the side wall of the blocking frame (6), and a driving member (7) is arranged on the inner wall of the housing cover (2), and the driving member (7) is used to drive the moving rod (5) to slide on the inner wall of the housing cover (2).

2. The safety contactor according to claim 1, wherein: The driving member (7) includes a coil (71), a moving magnetic block (72), and a static magnetic block (73). The coil (71) is installed on one side of the blocking frame (6) away from the static contact (3), the moving magnetic block (72) is fixed to one end of the moving rod (5) away from the moving contact (4), the static magnetic block (73) is fixed to the inner wall of the housing cover (2), the moving magnetic block (72) is elastically connected to the static magnetic block (73), and both the static magnetic block (73) and the moving magnetic block (72) are close to the coil (71).

3. The safety contactor according to claim 1, characterized in that: A number of load-bearing blocks (8) are fixed to the side wall of the blocking frame (6).

4. The safety contactor according to claim 3, characterized in that: A number of clamping strips (9) are fixed to the side wall of the blocking frame (6), a clamping groove (10) is formed on the side wall of the load-bearing block (8), and the side wall of the clamping strip (9) abuts against the inner wall of the clamping groove (10).

5. The safety contactor according to claim 4, characterized in that: A safety block (11) is installed on the side wall of the housing, the safety block (11) is close to the blocking frame (6), and the side wall of the safety block (11) can abut against the side wall of the arc extinguishing housing (1).

6. A safety contactor according to claim 5, characterized in that: A safety plate (12) is fixed to the side wall of the moving contact (4), and the side wall of the safety block (11) close to the static contact (3) abuts against the side wall of the safety plate (12).

7. A safety contactor according to claim 6, characterized in that: A blocking block (13) is fixed to one end of the moving rod (5) close to the static contact (3).

8. A safety contactor according to claim 7, characterized in that: A number of support strips (14) are fixed to one side of the blocking frame (6) close to the static contact (3), and the side wall of the support strip (14) abuts against the side wall of the safety block (11).

Images