High-voltage direct-current relay

Abstract

The utility model discloses a high-voltage direct-current relay which comprises a protective shell, an electromagnetic winding is arranged in the protective shell, an armature is arranged on one side of the electromagnetic winding, a movable contact piece is arranged on one side of the armature, and a protective top cover is arranged at the upper end of the protective shell. The protection top cover is provided with an overvoltage protection element and an overcurrent protection device. Through the above structure, the overvoltage protection element is connected with the input terminal, the input terminal is connected with the conductive sheet, the conductive sheet is connected with one end of the electromagnetic winding, one end of the overcurrent protection device is connected with the output terminal, and the other end is connected with the load, thereby preventing damage to the relay or a subsequent circuit caused by overvoltage or overcurrent. A top convex movable contact at the upper end of the movable contact piece is matched with a bearing concave static contact at the upper end of the fixed contact piece, so that the movable contact piece can be in closer contact with the bearing concave static contact when the contacts are closed, the movable contact piece stably acts in the sliding rail through clamping grooves in the two sides, and a second tension spring can pull the movable contact piece back to the original position.

Description

TECHNICAL FIELD

[0001] The utility model relates to relay technology field especially relates to a high voltage direct current relay. BACKGROUND

[0002] In high voltage direct current system, the safety and reliability of circuit are very important, any fault can cause serious consequences, and relay is widely used in electric appliance automation field, it is actually a kind of " automatic switch " with smaller current to control larger current, plays the role of automatic regulation, safety protection etc. in circuit, in order to guarantee safety, the requirement of high voltage direct current relay is also higher.

[0003] Electronic equipment development pays more and more attention to miniaturization, and higher requirements are put forward to the size and installation space of high voltage direct current relay, the volume and weight of existing high voltage direct current relay can still need to be reduced to facilitate installation in compact electronic equipment, and the protection mechanism can not reach the required effect, and the contact surface of contact patch contact point can not be close enough. UTILITY MODEL CONTENTS

[0004] The utility model discloses a high voltage direct current relay, smaller overall volume and weight, improve the contact point structure, increase the contact performance and stability of contact point, add protection mechanism to effectively prevent the damage of relay due to external factors, improve the heat dissipation efficiency, reduce the working temperature of relay, improve the service life of device.

[0005] In order to realize the above-mentioned purpose, provide a kind of high voltage direct current relay, including protective shell, the protective shell inside is provided with electromagnetic winding, electromagnetic winding side is provided with armature, armature side is provided with movable contact patch, protective shell upper end is provided with protective top cap, and overvoltage protection element and overcurrent protection device are arranged on protective top cap.

[0006] According to the high voltage direct current relay, the electromagnetic winding is wound on the magnetic core, one end of the electromagnetic winding is connected to the conductive sheet, the magnetic core is hollow and provided with an inner magnetic strut, the magnetic core and the inner magnetic strut are fixed on the bearing plate, the bearing plate is provided with a cooling fin, and the bearing plate is fixed on the inner wall of the protective shell at both ends.

[0007] According to the high voltage direct current relay, the movable contact patch is provided with a clamping groove on both sides, the clamping groove is arranged in the slide rail, the second tension spring is fixed on the back of the movable contact patch, and the other end of the second tension spring is fixed on the bearing plate.

[0008] According to the high-voltage direct-current relay, the upper end of the movable contact piece is provided with a top convex movable contact point, the top convex movable contact point is matched with a concave fixed contact point, the concave fixed contact point is arranged on the upper end of the fixed contact piece, the movable contact piece and the fixed contact piece are fixed on the bearing plate, and the upper ends of the movable contact piece and the fixed contact piece are covered with an arc extinguishing cover.

[0009] According to the high-voltage direct-current relay, the armature is provided with an upper terminal and a lower terminal at two ends, the armature is fixed through a first tension spring, and when the armature is displaced due to the magnetic field, the upper terminal is connected with the magnetic core and the lower terminal applies pressure to the movable contact piece.

[0010] According to the high-voltage direct-current relay, the overvoltage protection element is connected with an input terminal, and the input terminal is connected with a conductive sheet.

[0011] According to the high-voltage direct-current relay, the overcurrent protection device is connected with an output terminal, and the output terminal is connected with a movable contact piece and a fixed contact piece.

[0012] According to the high-voltage direct-current relay, the protective shell is provided with heat dissipation holes.

[0013] Beneficial effects:

[0014] 1. The protection top cover is provided with an overvoltage protection element and an overcurrent protection device, the overvoltage protection element is connected with an input terminal, the input terminal is connected with a conductive sheet, one end of the conductive sheet is connected with an electromagnetic winding, when overvoltage occurs in a high-voltage direct-current circuit, the resistance of the overvoltage protection element rapidly decreases, the overcurrent protection device is provided with an output terminal at one end and a load at the other end, and the overcurrent protection device can act in time when overcurrent occurs in the circuit, thereby protecting the relay and the entire circuit system, greatly reducing the risk of equipment damage caused by abnormal voltage or current, improving the stability and reliability of the system, the bearing plate is provided with heat dissipation fins, and the protective shell is provided with ventilation holes, thereby improving the heat dissipation performance of the relay.

[0015] 2. The electromagnetic winding is wound on the magnetic core, the magnetic core is hollow and provided with an inner magnetic support rod, the stability and strength of the magnetic field are enhanced, the clamping grooves on the two sides of the movable contact piece are arranged in the slide rails, the stability and accuracy of the movable contact piece during action are ensured, contact failure or misoperation caused by contact piece deviation is avoided, the second tension spring is fixed on the bearing plate at the back of the movable contact piece, the second tension spring can quickly pull the movable contact piece back to the original position when the relay is disconnected, the response speed and reliability of the relay are improved, and the design that the top convex movable contact point at the upper end of the movable contact piece is matched with the concave fixed contact point at the upper end of the fixed contact piece enables the contact points to be more closely contacted when closed, thereby improving the on-off performance of the circuit.

[0016] The additional aspects and advantages of the present application will be given in part in the following description, some will become apparent from the following description, or will be understood through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in conjunction with the drawings and embodiments.

[0018] Figure 1 A perspective view of a high-voltage DC relay is proposed for the present application;

[0019] Figure 2 A perspective view of the inside of a high-voltage DC relay is proposed for the present application;

[0020] Figure 3 A structure diagram of the inner contact of a high-voltage DC relay is proposed for the present application;

[0021] Figure 4 A structure diagram of the inner magnetic core of a high-voltage DC relay is proposed for the present application.

[0022] LEGEND:

[0023] 1, protective shell; 2, heat dissipation hole; 3, protective top cover; 4, input terminal; 5, overvoltage protection element; 6, output terminal; 7, overcurrent protection device; 8, conductive sheet; 9, electromagnetic winding; 10, magnetic core; 11, upper terminal; 12, armature; 13, first tension spring; 14, lower terminal; 15, arc extinguishing cover; 16, slide rail; 17, bearing plate; 18, heat dissipation fin; 19, second tension spring; 20, clamping groove; 21, movable contact; 22, top convex movable contact; 23, concave bearing static contact; 24, fixed contact; 25, inner magnetic support rod. DETAILED DESCRIPTION

[0024] This part will describe the specific embodiments of the present application in detail, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with figures, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0025] REFERENCE Figures 1-4 , the present application embodiment a kind of high-voltage DC relay, it includes protective shell 1, protective shell 1 inside is provided with electromagnetic winding 9, electromagnetic winding 9 side is provided with armature 12, armature 12 side is provided with movable contact 21, protective shell 1 upper end is provided with protective top cover 3, protective top cover 3 is provided with overvoltage protection element 5 and overcurrent protection device 7.

[0026] The electromagnetic winding 9 is wound on the magnetic core 10, the electromagnetic winding 9 controls the strength and direction of the magnetic field through the control of the current, one end of the electromagnetic winding 9 is connected with the conductive sheet 8, the magnetic core 10 is hollow inside and is provided with an inner magnetic branch 25, the inner magnetic branch 25 enhances the stability and strength of the magnetic field, the magnetic core 10 and the inner magnetic branch 25 are fixed on the bearing plate 17, the bearing plate 17 is provided with a cooling fin 18, the bearing plate 17 is fixed at both ends in the inner wall of the protective shell 1, the cooling fin 18 increases the heat dissipation area, helps the relay to dissipate heat in the working process, and keeps the temperature stable.

[0027] The movable contact piece 21 is provided with a clamping groove 20 on both sides, the clamping groove 20 provides guidance and positioning when the movable contact piece 21 moves, the clamping groove 20 is arranged in the sliding rail 16, the movable contact piece 21 is fixed with a second tension spring 19 on the back, the other end of the second tension spring 19 is fixed on the bearing plate 17, the second tension spring 19 can quickly pull the movable contact piece 21 back to the original position when the relay is disconnected.

[0028] The movable contact piece 21 is provided with a top convex movable contact 22 at the upper end, the top convex movable contact 22 is matched with a concave static contact 23, the concave static contact 23 is arranged at the upper end of the fixed contact piece 24, the movable contact piece 21 and the fixed contact piece 24 are fixed on the bearing plate 17, the upper ends of the movable contact piece 21 and the fixed contact piece 24 are covered with an arc extinguishing cover 15, the arc extinguishing cover 15 prevents the damage to the contact caused by the electric arc generated when the contact is disconnected.

[0029] The armature 12 is provided with an upper terminal 11 and a lower terminal 14 at both ends, the armature 12 is fixed through a first tension spring 13, when the armature 12 is displaced due to the action of the magnetic field, the upper terminal 11 is connected with the magnetic core 10, and the lower terminal 14 exerts pressure on the movable contact piece 21, the upper terminal 11 and the lower terminal 14 respectively realize the connection with the magnetic core 10 and the pressure exertion on the movable contact piece 21, so as to control the on-off of the circuit.

[0030] The overvoltage protection element 5 is connected with an input terminal 4, the overvoltage protection element 5 automatically disconnects the circuit when the input voltage exceeds the set value, prevents the damage to the relay or the subsequent circuit caused by the excessively high voltage, and the input terminal 4 is connected with the conductive sheet 8.

[0031] The overcurrent protection device 7 is connected with an output terminal 6, the output terminal 6 is connected with the movable contact piece 21 and the fixed contact piece 24, the overcurrent protection device 7 automatically cuts off the circuit when the current exceeds the set value, prevents the problems such as overheating and damage caused by the excessively large current.

[0032] The protective shell 1 is provided with a heat dissipation hole 2, the heat dissipation hole 2 provides an air flow passage, helps to dissipate heat, and prevents the internal overheating of the relay.

[0033] Working principle: high voltage current input protection cover 3 overvoltage protection element 5, through the input terminal 4 to the conductive sheet 8, the conductive sheet 8 is installed at the bottom of the bearing plate 17, the conductive sheet 8 connects one end of the electromagnetic winding 9, when the input voltage exceeds the set value, the overvoltage protection element 5 will automatically disconnect the circuit, prevent high voltage damage to the relay or subsequent circuit, the electromagnetic winding 9 is wound on the magnetic core 10, the magnetic core 10 is internally hollow and provided with an inner magnetic branch 25, which enhances the stability and strength of the magnetic field, the armature 12 is arranged on the right side of the electromagnetic winding 9, the upper terminal 11 of the armature 12 is forced to displace under the attraction of the magnetic field, the lower terminal 14 below the armature 12 exerts pressure on the movable contact piece 21 on the side due to the principle of lever, the movable contact piece 21 is moved in the slide rail 16 towards the fixed contact piece 24 by the second tension spring 19 pulling the clamping groove 20 on both sides, the top convex movable contact point 22 on the movable contact piece 21 is closely combined with the upper end of the fixed contact piece 24, the movable contact piece 21 and the fixed contact piece 24 are covered by the arc extinguishing cover 15 above, which acts when the contact point is disconnected, preventing the generated arc from damaging the contact point, the bottom end of the movable contact piece 21 and the fixed contact piece 24 is connected with the output terminal 6, the output terminal 6 is connected with the overcurrent protection device 7, the other end of the overcurrent protection device 7 is connected with the load or subsequent circuit, the overcurrent protection device 7 automatically cuts off the circuit when the current exceeds the set value, preventing overheating, damage and other problems caused by excessive current, the heat dissipation fin 18 installed on the bearing plate 17 and the heat dissipation hole 2 provided on the protective shell 1 help the relay dissipate heat during operation, prevent internal overheating, the first tension spring 13 and the second tension spring 19 can quickly pull the armature 12 and the movable contact piece 21 back to the original position when the relay is disconnected.

[0034] The embodiments of the utility model are described in detail above combined with the drawings, but the utility model is not limited to the above-mentioned embodiments, within the knowledge range possessed by the ordinary skilled in the art, various changes can be made without departing from the purpose of the utility model.

Claims

1. A high-voltage DC relay, comprising a protective housing (1), characterized in that: The protective housing (1) is provided with an electromagnetic winding (9) inside. An armature (12) is provided on one side of the electromagnetic winding (9). A movable contact piece (21) is provided on one side of the armature (12). A protective top cover (3) is provided at the upper end of the protective housing (1). An overvoltage protection element (5) and an overcurrent protection device (7) are provided on the protective top cover (3).

2. A high-voltage DC relay according to claim 1, characterized in that, The electromagnetic winding (9) is wound on the magnetic core (10). One end of the electromagnetic winding (9) is connected to the conductive sheet (8). The magnetic core (10) is hollow inside and is provided with an inner magnetic support rod (25). The magnetic core (10) and the inner magnetic support rod (25) are fixed on the support plate (17). The support plate (17) is provided with heat sink (18). Both ends of the support plate (17) are fixed to the inner wall of the protective shell (1).

3. A high-voltage DC relay according to claim 1, characterized in that, The movable contact piece (21) is provided with slots (20) on both sides. The slots (20) are located in the slide rail (16). A second tension spring (19) is fixed on the back of the movable contact piece (21). The other end of the second tension spring (19) is fixed to the bearing plate (17).

4. A high-voltage DC relay according to claim 1, characterized in that, The movable contact piece (21) is provided with a top protruding movable contact (22) at its upper end. The top protruding movable contact (22) is paired with a concave stationary contact (23). The concave stationary contact (23) is provided at the upper end of the fixed contact piece (24). The movable contact piece (21) and the fixed contact piece (24) are fixed on the bearing plate (17). The upper ends of the movable contact piece (21) and the fixed contact piece (24) are covered with an arc extinguishing cover (15).

5. A high-voltage DC relay according to claim 1, characterized in that, The armature (12) is provided with an upper terminal (11) and a lower terminal (14) at both ends. The armature (12) is fixed by a first tension spring (13). When the armature (12) is displaced due to the magnetic field, the upper terminal (11) connects to the magnetic core (10), and the lower terminal (14) applies pressure to the movable contact piece (21).

6. A high-voltage DC relay according to claim 1, characterized in that, The overvoltage protection element (5) is connected to an input terminal (4), and the input terminal (4) is connected to a conductive sheet (8).

7. A high-voltage DC relay according to claim 1, characterized in that, The overcurrent protection device (7) is connected to an output terminal (6), and the output terminal (6) is connected to a movable contact piece (21) and a fixed contact piece (24).

8. A high-voltage DC relay according to claim 1, characterized in that, The protective shell (1) is provided with heat dissipation holes (2).

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