Direct current contactor with good waterproof performance

Abstract

The utility model discloses a direct current contactor with good waterproof performance, which relates to the technical field of direct current contactors and comprises a contact base, positioning grooves are symmetrically arranged at the bottom end of the contact base, a sealing rubber mat is arranged right above the contact base, a sealing cover is arranged right above the sealing rubber mat, and the sealing cover is connected with the contact base. A shielding mechanism is arranged on the outer side of the sealing cover, the shielding mechanism shields the surface of the contactor in a centralized mode, external rainwater or mist is prevented from being directly attached to the surface of the contactor, an opening and closing mechanism is arranged in the contact base, and the opening and closing mechanism drives the movable contact piece to be connected with or disconnected from the two static contacts at the same time. In the using process, the side supporting arms arranged on the two sides can be pulled according to the surface of the contact base and the shielding requirement, the shielding area is adjusted through the side supporting arms arranged on the two sides, and in the adjusting process, transverse positioning treatment is conducted on the side supporting arms through the outer tooth sleeve rods arranged on the two sides.

Description

Technical Field

[0001] The utility model relates to the technical field of direct current contactors, in particular to a direct current contactor with good waterproof performance. Background Art

[0002] A DC contactor is a contactor used in a DC circuit, mainly used to control a DC circuit. The iron core of a DC contactor is different from that of an AC contactor. It does not have eddy currents, so it is generally made of soft steel or industrial pure iron in a round shape. Since the attraction coil of a DC contactor is connected to a DC current, there is no impact starting current, and there will be no violent impact of the iron core. Therefore, it has a long life and is suitable for occasions where frequent starting and stopping are required.

[0003] Current DC contactors lack some protective devices, so that water or other substances in the external environment falling on the DC contactor may cause poor contact or other faults, affecting the safety of the use of the DC contactor. Summary of the invention

[0004] The purpose of the utility model is to provide a DC contactor with good waterproof performance to solve the above-mentioned defects caused by the prior art.

[0005] A DC contactor with good waterproof performance comprises a contact base, wherein the bottom end of the contact base is symmetrically provided with positioning grooves, a sealing rubber pad is arranged directly above the contact base, a sealing cover is arranged directly above the sealing rubber pad, a shielding mechanism is arranged on the outer side of the sealing cover, the shielding mechanism performs centralized shielding treatment on the surface of the contactor to prevent external rain or fog from directly adhering to the surface of the contactor, an opening and closing mechanism is arranged inside the contact base, and the opening and closing mechanism drives a moving contact piece to connect / disconnect with two static contacts at the same time.

[0006] Preferably, the shielding mechanism includes a sealing cover, an arc-shaped baffle, a side flat iron sheet, a side support arm and an external socket rod. The external socket rods are arranged on both sides of the sealing cover. The outer side of the external socket rod is penetrated and connected with a side support arm. The outer side axis of the side support arm is connected with a side flat iron sheet. An arc-shaped baffle is arranged directly above the side flat iron sheet.

[0007] Preferably, the sealing cover is connected to the side support arm via external sleeve rods arranged on both sides.

[0008] Preferably, the opening and closing mechanism includes a control handle, a copper contact piece, an iron sheet grid, an inner contact cavity and a movable contact piece. The control handle is arranged through the top of the sealing cover, the bottom end of the control handle is connected to the copper contact piece, the iron sheet grid is arranged inside the contact base, the inner contact cavity is opened inside the contact base, and the outer side of the control handle is connected through the movable contact piece.

[0009] Preferably, the control handle is connected to the iron grid via a copper contact sheet arranged at the bottom.

[0010] Preferably, a fastening hole is formed through the outer side of the side flat iron sheet.

[0011] Preferably, an activated carbon cushion is symmetrically arranged inside the sealing cover.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. During use, according to the surface of the contact base and the need for shielding, the side support arms arranged on both sides can be pulled to adjust the shielding area through the side support arms arranged on both sides. During the adjustment process, the side support arms are positioned laterally through the external sleeve rods arranged on both sides, and are locked through nuts to improve the shielding of the top or arc of the contact base in different environments. At the same time, the side flat iron sheet arranged on the top is used to position the surroundings of the arc baffle.

[0014] 2. After the terminal is positioned, the bottom of the terminal is blocked by the activated carbon cushion to prevent external water vapor from corroding the contact surface between the terminal and the sealing cover, thereby causing a short circuit or damage during the transmission of current. The internal water vapor of the contact base and the sealing cover is absorbed by the activated carbon cushion. When the contact base is in operation, the heat generated accelerates the release rate of water vapor inside the activated carbon cushion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the structure of the side support arm itself in the utility model.

[0017] Figure 3 It is a schematic diagram of the front section structure of the contact base in the utility model.

[0018] Figure 4 It is a schematic diagram of the front section structure of the sealing cover in the utility model.

[0019] Figure 5 It is a schematic diagram of the control handle itself in the utility model.

[0020] in:

[0021] 1. Contact base; 2. Positioning groove; 3. Sealing rubber pad; 4. Sealing cover; 5. Shielding mechanism; 6. Arc baffle; 7. Side flat iron sheet; 8. Side support arm; 9. External socket rod; 10. Control handle; 11. Fastening hole; 12. Copper contact sheet; 13. Iron sheet grid; 14. Inner contact cavity; 15. Moving contact sheet; 16. Activated carbon seat cushion; 17. Opening and closing mechanism. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figures 1 to 5 As shown, a DC contactor with good waterproof performance includes a contact base 1, a positioning groove 2 is symmetrically opened at the bottom end of the contact base 1, a sealing pad 3 is arranged directly above the contact base 1, a sealing cover 4 is arranged directly above the sealing pad 3, a shielding mechanism 5 is arranged on the outer side of the sealing cover 4, the shielding mechanism 5 performs centralized shielding treatment on the surface of the contactor to prevent external rain or fog from directly adhering to the surface of the contactor, and an opening and closing mechanism 17 is arranged inside the contact base 1, and the opening and closing mechanism 17 drives the moving contact piece 15 to connect / disconnect with the two static contacts at the same time.

[0024] In this embodiment, the shielding mechanism 5 includes a sealing cover 4, an arc-shaped baffle plate 6, a side flat iron sheet 7, a side support arm 8 and an external socket rod 9. External socket rods 9 are arranged on both sides of the sealing cover 4. The outer side of the external socket rod 9 is penetrated and connected with the side support arm 8. The outer axis of the side support arm 8 is connected with the side flat iron sheet 7. An arc-shaped baffle plate 6 is arranged directly above the side flat iron sheet 7. The sealing cover 4 and the control handle 10 are shielded by the arc-shaped baffle plate 6 to prevent water vapor from penetrating into the interior of the contact base 1.

[0025] In this embodiment, the sealing cover 4 is connected to the side support arms 8 via the outer sleeve rods 9 provided on both sides, and the side support arms 8 are used to perform positioning processing on the outer side of the outer sleeve rods 9 .

[0026] In this embodiment, the opening and closing mechanism 17 includes a control handle 10, a copper contact piece 12, an iron sheet grid 13, an inner contact cavity 14 and a moving contact piece 15. The control handle 10 is arranged through the top of the sealing cover 4, and the bottom end of the control handle 10 is connected to the copper contact piece 12. The iron sheet grid 13 is arranged inside the contact base 1. The inner contact cavity 14 is opened inside the contact base 1. The outer side of the control handle 10 is connected through the moving contact piece 15. The iron sheet grid 13 is positioned by the inner contact cavity 14. The iron sheet grid 13 is positioned by the inner contact cavity 14 to avoid arc damage to the contact base 1 when the current is separated.

[0027] In this embodiment, the control handle 10 is connected to the iron grid 13 through a copper contact piece 12 arranged at the bottom, and the top of the iron grid 13 is contacted by the copper contact piece 12. The arc is extinguished by the contact between the copper contact piece 12 and the iron grid 13.

[0028] In this embodiment, a fastening hole 11 is formed through the outer side of the side flat iron sheet 7 , and the four sides of the arc-shaped baffle 6 are positioned and locked through the fastening hole 11 .

[0029] In this embodiment, activated carbon cushions 16 are symmetrically arranged inside the sealing cover 4, and the activated carbon cushions 16 are used to position and separate the bottom ends of the terminal terminals to prevent water vapor from corroding the bottom ends of the terminal terminals.

[0030] This kind of DC contactor with good waterproof performance has the following working contents in practical application:

[0031] Step 1: During use, the contact base 1 is positioned through the positioning groove 2 provided at the bottom end, and the side support arm 8 is pulled to rotate the side support arm 8 on both sides of the sealing cover 4 provided on both sides. According to the area of ​​the sealing cover 4, and by rotating the nuts on both sides, the angles of the outer tooth sleeve rod 9 and the side flat iron sheet 7 are adjusted and locked, and the arc baffles 6 provided on both sides are positioned on both sides of the side flat iron sheet 7, and the connection between the arc baffles 6 and the side flat iron sheet 7 is locked by glue or screws;

[0032] Step 2: During operation, the operator inserts the wires into the terminals opened on both sides, and inserts the bolts into the terminals, locks the terminals and the copper wires with the bolts, and positions and isolates the bottom of the terminals through the activated carbon cushion 16 arranged below to prevent the terminals from being corroded by external water vapor, and blocks the gap between the contact base 1 and the sealing cover 4 through the sealing rubber cushion 3 arranged outside to prevent external water vapor from penetrating into the cavity;

[0033] Step 3: When the coil is energized, the coil current set inside the contact base 1 generates a magnetic field, which is moved by the moving contact piece 15. During the movement of the moving contact piece 15, the moving contact piece 15 is connected with the static contacts set on the left and right sides, thereby realizing the attraction of the contactor. Terminals are set on both sides to connect the circuit. When the equipment is powered on, the copper contact piece 12 is used to press the arc to continue to enter the iron sheet grid 13, the magnetic resistance is reduced, and the pulling force of the iron sheet on the arc is increased, which is sufficient to make the arc enter all the iron sheet grids 13. After the arc enters the grid, it is divided into many short arcs in series.

[0034] Therefore, the embodiments disclosed above are only illustrative in all aspects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A DC contactor with good waterproof performance, characterized in that: The invention comprises a contact base (1), wherein the bottom end of the contact base (1) is symmetrically provided with a positioning groove (2), a sealing rubber pad (3) is arranged directly above the contact base (1), a sealing cover (4) is arranged directly above the sealing rubber pad (3), a shielding mechanism (5) is arranged on the outer side of the sealing cover (4), the shielding mechanism (5) performs centralized shielding treatment on the surface of the contactor to prevent rain or fog from outside from directly adhering to the surface of the contactor, and an opening and closing mechanism (17) is arranged inside the contact base (1), and the opening and closing mechanism (17) drives the moving contact piece to connect / disconnect with two static contacts at the same time.

2. A DC contactor with good waterproof performance according to claim 1, characterized in that: The shielding mechanism (5) comprises a sealing cover (4), an arc-shaped baffle plate (6), a side flat iron sheet (7), a side support arm (8) and an outer socket rod (9); the outer socket rod (9) is provided on both sides of the sealing cover (4); the outer side of the outer socket rod (9) is connected to the side support arm (8); the outer side axis of the side support arm (8) is connected to the side flat iron sheet (7); and the arc-shaped baffle plate (6) is provided directly above the side flat iron sheet (7).

3. A DC contactor with good waterproof performance according to claim 2, characterized in that: The sealing cover (4) is connected to the side support arm (8) via external sleeve rods (9) arranged on both sides.

4. A DC contactor with good waterproof performance according to claim 1, characterized in that: The opening and closing mechanism (17) comprises a control handle (10), a copper contact sheet (12), an iron sheet grid (13), an inner contact cavity (14) and a movable contact sheet (15); the control handle (10) is arranged through the top of the sealing cover (4); the bottom of the control handle (10) is connected to the copper contact sheet (12); the iron sheet grid (13) is arranged inside the contact base (1); the inner contact cavity (14) is opened inside the contact base (1); and the outer side of the control handle (10) is connected through the movable contact sheet (15).

5. A DC contactor with good waterproof performance according to claim 4, characterized in that: The control handle (10) is connected to the iron grid (13) via a copper contact sheet (12) arranged at the bottom end.

6. A DC contactor with good waterproof performance according to claim 2, characterized in that: A fastening hole (11) is formed through the outer side of the side flat iron sheet (7).

7. A DC contactor with good waterproof performance according to claim 1, characterized in that: An activated carbon cushion (16) is symmetrically arranged inside the sealing cover (4).

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