Double-moving-contact structure of direct-current contactor and direct-current contactor

Abstract

The utility model discloses a direct current contactor double moving contact structure and a direct current contactor, the direct current contactor double moving contact structure is characterized in that a protection box is provided with a threading port, the inner surface of the protection box is fixedly connected with a support plate, the support plate is provided with two through holes, the inner walls of the two through holes are slidingly connected with moving contacts, the upper ends of the two moving contacts are provided with clamp assemblies, and the clamp assemblies are provided with clamping grooves. A connecting plate is fixedly connected between the two moving contacts, the upper surface of the connecting plate is fixedly connected with a reset spring, and the upper end of the reset spring is fixedly connected to the lower surface of the supporting plate; by means of the components, the situation that a large amount of heat is generated in the direct current contactor body and at the contact positions of the moving contact and the static contact under the condition of long-time operation or high load can be prevented, the opening degree of the air opening can be adjusted, and therefore the air inlet amount can be controlled, and the more accurate heat dissipation effect can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of DC contactor technology, and in particular to a double-moving contact structure for a DC contactor and a DC contactor. Background Technology

[0002] The existing double-acting contact structure of DC contactors and DC contactors are electrical devices used to control DC circuits. The double-acting contact structure means that the contacts inside the contactor are designed as two sets of independent contacts, which can reduce the load on a single contact and improve the reliability and service life of the contactor.

[0003] However, if it lacks a heat dissipation component or the heat dissipation component does not have an airflow adjustment function, the contactor will generate heat during operation. If it cannot dissipate heat effectively, the temperature may rise, thus affecting its performance. Without airflow adjustment, it cannot achieve a more precise heat dissipation effect. Under high load conditions, heat dissipation may be insufficient, leading to overheating of the equipment. Under low load conditions, heat dissipation may be excessive, leading to overcooling of the equipment. Both of these will affect the normal performance of the equipment. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a double-moving contact structure for a DC contactor and a DC contactor. Through a second motor driving a fan blade and a compressor driving a cooling plate, cool air can be blown into the interior of the housing, preventing excessive heat from being generated inside the DC contactor body and at the contact points of the moving and stationary contacts under long-term operation or high load conditions. Overheating can lead to material aging, contact damage, or even failure. A first motor driving a baffle can adjust the size of the air vent opening, thereby controlling the air intake. The air intake can be dynamically adjusted according to the temperature changes and workload of the equipment to achieve a more precise heat dissipation effect. Adjusting the air intake can also optimize airflow and reduce fan noise. The double-moving contact mechanism, with its two moving and stationary contacts, reduces the load on a single contact, improving the reliability and service life of the contactor. Furthermore, the simultaneous operation of the two contacts effectively reduces the risk of contact welding caused by electric arcs.

[0005] This utility model also provides a double-moving contact structure for a DC contactor as described above, comprising: a protective housing, wherein the protective housing is provided with a wire-passing port, a support plate is fixedly connected to the inner surface of the protective housing, the support plate is provided with two through holes, moving contacts are slidably connected to the inner walls of the two through holes, clamping assemblies are provided at the upper ends of the two moving contacts, a connecting plate is fixedly connected between the two moving contacts, a return spring is fixedly connected to the upper surface of the connecting plate, and the upper end of the return spring is fixedly connected to the lower surface of the support plate; a stationary contact, wherein the stationary contact is movably connected to the moving contact, and a connecting joint is provided between the stationary contact and the moving contact. The gate assembly includes a fan duct connected to the side surface of the protective housing, a bracket fixedly connected to the inner wall of the fan duct, a second motor fixedly connected to the inner surface of the bracket, a fan blade fixedly connected to the output end of the second motor, a cooling plate fixedly connected to the inner wall of the fan duct, a compressor fixedly connected to the side surface of the protective housing, the output end of the compressor connected to the cooling plate, a protective plate fixedly connected to the other end of the fan duct, multiple air vents provided on the protective plate, a baffle rotatably connected to the rear surface of the protective plate, the baffle having the same shape as the air vents, and a first motor fixedly connected to the front surface of the protective plate, the baffle being driven by the first motor.

[0006] According to the present invention, a double moving contact structure for a DC contactor includes a clamping assembly comprising a sleeve, an opening, and a pressing rod. The sleeve is fixedly connected to the upper end of the moving contact, the opening is disposed on the sleeve, and the pressing rod is threadedly connected to the inner wall of the sleeve.

[0007] According to the present invention, a double-moving contact structure for a DC contactor includes a closing assembly comprising an iron ring and an electromagnet. The iron ring is fixedly connected to the outer wall of the moving contact, and the electromagnet is fixedly connected to the outer wall of the stationary contact. The electromagnet is movably connected to the iron ring.

[0008] According to the present invention, a double-moving contact structure for a DC contactor is provided, wherein a door frame is connected through the front surface of the protective housing, and a cover plate is movably connected to the front surface of the door frame.

[0009] According to the present invention, a double-acting contact structure of a DC contactor is provided, wherein a handle is fixedly connected to the front surface of the cover plate, and an anti-slip sleeve is fixedly connected to the outer surface of the handle.

[0010] According to the present invention, a double-acting contact structure for a DC contactor is provided on the protective housing, and a protective shell is fixedly connected to the side surface of the protective housing, with the vent located inside the protective shell.

[0011] According to the present invention, a double-acting contact structure for a DC contactor is provided, wherein a fixing plate is fixedly connected to the side surface of the protective box, and the fixing plate is provided with fixing holes.

[0012] According to the present invention, a DC contactor includes a double-moving contact structure as described in any one of the above claims, and further includes: a DC contactor body, the DC contactor body being fixedly connected to the inner surface of a protective housing, the stationary contact being fixedly connected to the upper surface of the DC contactor body, and the stationary contact being electrically connected to the DC contactor body.

[0013] Beneficial effects

[0014] 1. Compared with the existing technology, the double-moving contact structure of this DC contactor, through the motor two driving the fan blades and the compressor driving the cooling plate, can blow cold air into the interior of the enclosure, preventing the generation of a large amount of heat inside the DC contactor body and the contact positions of the moving and stationary contacts under long-term operation or high load conditions. Overheating can lead to material aging, contact damage or even failure. By rotating the baffle through the motor one, the size of the air vent opening can be adjusted, thereby controlling the air intake. The air intake can be dynamically adjusted according to the temperature change and workload of the equipment to achieve a more precise heat dissipation effect. In addition, adjusting the air intake can optimize airflow and reduce fan noise.

[0015] 2. Compared with the prior art, the double-moving contact structure of this DC contactor and the DC contactor, through the setting of two moving contacts and stationary contacts, the double-moving contact mechanism can reduce the load of a single contact, improve the reliability and service life of the contactor, and because the two contacts work at the same time, it can effectively reduce the risk of contact welding caused by electric arc generation. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a view of the double-moving contact structure of the DC contactor of this utility model and the main structural view of the DC contactor;

[0018] Figure 2 This utility model presents a double-moving contact structure of a DC contactor and a cross-sectional view of the DC contactor.

[0019] Figure 3 This utility model presents a double-moving contact structure of a DC contactor and a bottom view of the DC contactor.

[0020] Figure 4 This is a view of the double-moving contact structure of the DC contactor of this utility model and a rear view of the DC contactor.

[0021] Legend:

[0022] 1. Door frame; 2. Cover plate; 3. Handle; 4. Anti-slip sleeve; 5. Protective shell; 6. Protective box; 7. Mounting plate; 8. Fixing hole; 9. Fan duct; 10. Protective plate; 11. Air outlet; 12. Motor 1; 13. Baffle; 14. Motor 2; 15. Fan blade; 16. Refrigeration plate; 17. Bracket; 18. Compressor; 19. Down pressure rod; 20. Sleeve; 21. Support plate; 22. Opening; 23. Moving contact; 24. Return spring; 26. Iron ring; 27. Electromagnet; 28. Stationary contact; 29. ​​DC contactor body; 30. Exhaust port. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] Reference Figure 1-4 This utility model discloses a double-acting contact structure for a DC contactor and a DC contactor, comprising: a protective housing 6 for protecting internal components; a door frame 1 connected through the front surface of the protective housing 6; a cover plate 2 movably connected to the front surface of the door frame 1; a handle 3 fixedly connected to the front surface of the cover plate 2; an anti-slip sleeve 4 fixedly connected to the outer surface of the handle 3; an exhaust hole 30 provided on the protective housing 6; a protective shell 5 fixedly connected to the side surface of the protective housing 6; the exhaust hole 30 located inside the protective shell 5; a fixing plate 7 fixedly connected to the side surface of the protective housing 6; a fixing hole 8 provided on the fixing plate 7; a wire insertion port provided on the protective housing 6 for inserting wires into the protective housing 6; and a support plate 21 fixedly connected to the inner surface of the protective housing 6; the support plate 21 having two through holes.

[0025] Both through holes have slidingly connected moving contacts 23 for connecting stationary contacts 28. Each moving contact 23 has a clamping assembly at its upper end for clamping the wire connected to it. The clamping assembly includes a sleeve 20, an opening 22, and a pressing rod 19. The sleeve 20 is fixedly connected to the upper end of the moving contact 23, the opening 22 is located on the sleeve 20, and the pressing rod 19 is threaded to the inner wall of the sleeve 20. A connecting plate 25 is fixedly connected between the two moving contacts 23. A return spring 24 is fixedly connected to the upper surface of the connecting plate 25 for resetting the moving contact 23 when the circuit is open. The upper end of the return spring 24 is fixedly connected to the lower surface of the support plate 21. A stationary contact 28 is used to connect the moving contact 23. The stationary contact 28 is movably connected to the moving contact 23. A closing assembly is provided between the stationary contact 28 and the moving contact 23 to connect the moving contact 23 and the stationary contact 28 together.

[0026] The closing assembly includes: an iron ring 26 and an electromagnet 27. The iron ring 26 is fixedly connected to the outer wall of the moving contact 23, and the electromagnet 27 is fixedly connected to the outer wall of the stationary contact 28. The electromagnet 27 and the iron ring 26 are movably connected. A fan pipe 9 is connected to the side surface of the protective housing 6. A bracket 17 is fixedly connected to the inner wall of the fan pipe 9. A second motor 14 is fixedly connected to the inner surface of the bracket 17. A fan blade 15 is fixedly connected to the output end of the second motor 14 for blowing air. A cooling plate 1 is fixedly connected to the inner wall of the fan pipe 9. 6. A compressor 18 is fixedly connected to the side surface of the protective box 6 for cooling the air around the fan blade 15. The output end of the compressor 18 is connected to the cooling plate 16. The other end of the fan pipe 9 is fixedly connected to the protective plate 10. Multiple air vents 11 are provided on the protective plate 10 for ventilation. A baffle 13 is rotatably connected to the rear surface of the protective plate 10 for blocking the air vents 11. The shape of the baffle 13 is the same as that of the air vents 11. A motor 12 is fixedly connected to the front surface of the protective plate 10. The baffle 13 is driven by the motor 12.

[0027] A double-moving contact structure for a DC contactor further includes: a DC contactor body 29, which is a DC contactor and is a mature existing technology. Its specific structure will not be described in detail here. The DC contactor body 29 is fixedly connected to the inner surface of the protective box 6, and the stationary contact 28 is fixedly connected to the upper surface of the DC contactor body 29. The stationary contact 28 is electrically connected to the DC contactor body 29.

[0028] Working principle: In use, the equipment is installed and fixed in the designated position by the mounting plate 7. The wires are passed through the wire insertion port into the inside of the protective box 6. The DC power supply wire is connected to the DC contactor body 29. The load equipment is connected to the moving contact 23. The wires of the load equipment are inserted into the opening 22 on the sleeve 20. The lower pressure rod 19 is rotated downward to press and fix the load equipment wires. When closing the circuit, the electromagnet 27 is energized and starts to attract the iron ring 26 downward, thereby connecting the moving contact 23 with the stationary contact 28. When opening the circuit, the electromagnet 27 is de-energized, and the return spring 24 moves the moving contact 23 upward to reset it. The fan blade 15 driven by the second motor 14, in conjunction with the cooling plate 16, can blow cold air into the inside of the protective box 6, thereby cooling the internal equipment and preventing overheating. The baffle 13 driven by the first motor 12 can control the air intake of the air outlet 11.

[0029] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A double-moving contact structure for a DC contactor, characterized in that, include: A protective box (6) is provided with a wire-passing port. A support plate (21) is fixedly connected to the inner surface of the protective box (6). Two through holes are provided on the support plate (21). Moving contacts (23) are slidably connected to the inner walls of the two through holes. A clamp assembly is provided at the upper end of each of the two moving contacts (23). A connecting plate (25) is fixedly connected between the two moving contacts (23). A return spring (24) is fixedly connected to the upper surface of the connecting plate (25). The upper end of the return spring (24) is fixedly connected to the lower surface of the support plate (21). A stationary contact (28) is movably connected to the moving contact (23). A closing assembly is provided between the stationary contact (28) and the moving contact (23). A fan pipe (9) is connected to the side surface of the protective box (6). A bracket (17) is fixedly connected to the inner wall of the fan pipe (9). A motor (14) is fixedly connected to the inner surface of the bracket (17). A fan blade (15) is fixedly connected to the output end of the motor (14). A cooling plate (16) is fixedly connected to the inner wall of the fan pipe (9). A compressor (18) is fixedly connected to the side surface of the protective box (6). The output end of the compressor (18) is connected to the cooling plate (16). A protective plate (10) is fixedly connected to the other end of the fan pipe (9). Multiple air vents (11) are provided on the protective plate (10). A baffle (13) is rotatably connected to the rear surface of the protective plate (10). The shape of the baffle (13) is the same as that of the air vents (11). A motor (12) is fixedly connected to the front surface of the protective plate (10). The baffle (13) is driven by the motor (12).

2. The double-moving contact structure of a DC contactor according to claim 1, characterized in that, The clamp assembly includes: a sleeve (20), an opening (22), and a pressing rod (19). The sleeve (20) is fixedly connected to the upper end of the moving contact (23). The opening (22) is provided on the sleeve (20). The pressing rod (19) is threadedly connected to the inner wall of the sleeve (20).

3. The double-moving contact structure of a DC contactor according to claim 1, characterized in that, The closing assembly includes an iron ring (26) and an electromagnet (27). The iron ring (26) is fixedly connected to the outer wall of the moving contact (23), and the electromagnet (27) is fixedly connected to the outer wall of the stationary contact (28). The electromagnet (27) is movably connected to the iron ring (26).

4. The double-moving contact structure of a DC contactor according to claim 1, characterized in that, The front surface of the protective box (6) is connected to a door frame (1), and the front surface of the door frame (1) is movably connected to a cover plate (2).

5. The double-moving contact structure of a DC contactor according to claim 4, characterized in that, A handle (3) is fixedly connected to the front surface of the cover plate (2), and an anti-slip sleeve (4) is fixedly connected to the outer surface of the handle (3).

6. The double-moving contact structure of a DC contactor according to claim 1, characterized in that, The protective box (6) is provided with an exhaust hole (30), and a protective shell (5) is fixedly connected to the side surface of the protective box (6). The exhaust hole (30) is located inside the protective shell (5).

7. The double-moving contact structure of a DC contactor according to claim 1, characterized in that, A fixing plate (7) is fixedly connected to the side surface of the protective box (6), and a fixing hole (8) is provided on the fixing plate (7).

8. A DC contactor, characterized in that, The DC contactor with a double-moving contact structure according to any one of claims 1-7 further includes: a DC contactor body (29), the DC contactor body (29) being fixedly connected to the inner surface of the protective housing (6), the stationary contact (28) being fixedly connected to the upper surface of the DC contactor body (29), and the stationary contact (28) being electrically connected to the DC contactor body (29).

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