CN102005336B - Explosive Closure Switch - Google Patents

Abstract

The invention relates to an explosion type closed switch, belonging to the technical field of electric switches. The explosion type closed switch is suitable for various electric control occasions, and especially suitable for electric automatic control of ships. The switch comprises an insulating sleeve, wherein the inner cavity of the insulating sleeve is provided with an axle hole shoulder; one side of the axle hole shoulder is provided with a static contact used as a primary loop conductor, and the other side is provided with a base used as a conductor; the inner cavity of the base is provided with an igniter and a moving contact from outside to inside; a sliding cavity is arranged between the end face of the moving contact facing one end of the axle hole shoulder and the end face of a static contact; an insulating valve is arranged between one end of the moving contact and the axle hole shoulder; a groove is respectively arranged in the inner cavities of the static contact and the base; and an electric contact ring is respectively arranged in each groove. The invention has the advantages of simple structure, small size, light weight, high closing speed, shock resistance, high closing reliability, convenient maintenance and the like.

Description

Explosive Closure Switch

technical field

The invention relates to an explosive closing switch, which is a normally open switch, belongs to the technical field of electric switches, is suitable for various electric control occasions, and is especially suitable for automatic control of ship electrics.

Background technique

The existing traditional low-voltage contactor mainly uses the electromagnetic mechanism to make the moving contact go through a certain stroke to realize the contact closure. When the current-carrying part has a certain current-carrying capacity per unit volume, because the traditional contactor needs several times the volume of the current-carrying part The driving mechanism has caused the overall size and quality of the traditional contactor to be unable to be further reduced. Moreover, due to the limitations of its own structure, volume and quality, the traditional low-voltage contactor cannot withstand the environment of high shock and vibration. For example, as a protective switch used in marine electric control, it is required that the switch must have the characteristics of fast closing speed, small size, light weight, impact resistance and high reliability, and the existing mechanical switches cannot meet the requirements.

Contents of the invention

The object of the present invention is to provide an explosive closing switch with simple structure, fast closing speed, small size, light weight, impact resistance and high reliability.

Technical scheme of the present invention is as follows:

An explosive closing switch, which includes an insulating sleeve with a shaft hole shoulder in its inner cavity, one side of the shaft hole shoulder has a static contact as a main circuit conductor, and the other side has a static contact as a conductor The base; the inner chamber of the base is equipped with a detonating device and a moving contact from the outside to the inside; there is a sliding cavity between the end face of the end of the moving contact facing the shoulder of the shaft hole and the end face of the static contact; one end of the moving contact There is an insulating valve between the shoulder of the shaft hole; there is a groove in the inner cavity of the static contact and the base, and an electric contact ring is respectively installed in the groove.

In the explosive closed switch, the diameter of the inner orifice of the electrical contact ring of the static contact near the end of the movable contact is larger than the outer diameter of the movable contact, so that the movable contact can enter the electrical contact ring of the static contact without hindrance. middle.

In the explosive closed switch, the initial inner diameter of the electrical contact ring and the movable contact are interference fit.

In the explosive closing switch, the insulating valve is circular, and the inner ring has a plurality of grooves evenly distributed radially outward, and the diameter of the inner ring is smaller than the outer diameter of the movable contact.

In the explosive closed switch, the difference between the inner radius of the shoulder of the shaft hole in the inner cavity of the insulating sleeve and the outer radius of the movable contact is greater than the thickness of the insulating valve.

Said explosive closing switch has ventilation holes on the outer end surface of the static contact.

The detonating device of the explosive closing switch is composed of an electric squib, a sheath of the squib and a base of the detonating device.

In the explosive closing switch, the plastic insulating material of the insulating valve is selected from polyoxymethylene, polyamide, or polytetrafluoroethylene.

The basic working principle of the explosive closing switch: it uses the characteristics of fast explosive response and strong working ability. When the electrical system needs to be protected, the trigger signal detonates the explosive to quickly explode the moving contacts to achieve the purpose of protecting the electrical system. . That is: due to the huge impact force generated by the electric squib when it explodes, the moving contact in the inner cavity of the base overcomes the resistance of the insulating valve to move axially, and the moving contact quickly compresses the electrical contact ring in the groove of the static contact. Contact with the static contact, the switch is fully closed.

The invention has the advantages and technical effects of simple structure, high impact resistance, fast closing speed, high closing reliability and convenient maintenance; the explosive closing switch is suitable for various electric control occasions, especially for ship electric automatic control. The explosive closed switch can withstand the impact of hundreds of gravitational inertial accelerations: when the switch is not put into use, the moving contact is located between the detonating device and the insulating valve, and its movement is restricted; when the switch is in a closed working state, the moving contact The head is affected by the restoring force of the electric contact ring and the insulating valve. Therefore, the switch can withstand the impact of hundreds of gravity inertial accelerations in an instant and will not change its state.

Description of drawings

Fig. 1 is the schematic diagram of the axial section of the explosive closing switch of the present invention;

Fig. 2 is a structural schematic diagram of an insulating valve;

Fig. 3 is a structural schematic diagram of the detonating device.

The names of the components of each figure number in the figure are: 1-detonating device, 1.1-electric squib, 1.2-electric squib sheath, 1.3-detonating device base, 2-base, 2.1-sliding cavity, 3-moving contact; 4-insulation valve, 4.1-groove, 5-insulation sleeve, 5.1-shaft hole shoulder, 6-static contact; 7-electrical contact ring.

Detailed ways

The present invention is further described as follows in conjunction with accompanying drawing and embodiment:

Embodiment 1:

As shown in Figures 1, 2, and 3: an explosive closed switch has an insulating sleeve 5, a shaft hole shoulder 5.1 in its inner cavity, and one side of the shaft hole shoulder 5.1 serves as the main circuit The static contact 6 of the conductor has a base 2 as a conductor on the other side; the inner cavity of the base 2 is equipped with a detonating device 1 and a moving contact 3 from the outside to the inside; the moving contact 3 faces one end of the shaft hole shoulder 5.1 There is a sliding cavity 2.1 between the end face of the fixed contact 6 and the end face of the static contact 6; there is an insulating valve 4 between one end of the moving contact 3 and the shoulder 5.1 of the shaft hole; the inner cavity of the static contact 6 and the base 2 has a groove , an electrical contact ring 7 is housed in the groove respectively. The diameter of the inner orifice of the electric contact ring 7 of the static contact 6 near the movable contact 3 is larger than the outer diameter of the movable contact 3, so that the movable contact 3 can enter the electric contact ring 7 of the static contact 6 without hindrance. The initial inner diameter of the electrical contact ring 7 is an interference fit with the movable contact 3 . The restoring force generated by the electrical contact ring 7 after being compressed and deformed can make the movable contact 3 make reliable electrical contact with the base 2 and the static contact 6; the insulating valve 4 is circular and has a thickness of not less than 0.5 mm The groove 4.1 is evenly distributed radially to the outside of the inner ring and is 2-6; the width of the groove 4.1 is 0.5-3 mm, and the depth depends on the thickness of the insulating valve 4; the thickness of the insulating valve 4 in this embodiment is 1.5 mm , the number of grooves 4.1 is 3, the width is 1 mm, and the depth is 0.8 mm. The difference between the inner radius of the shaft hole shoulder 5.1 in the inner cavity of the insulating sleeve 5 and the outer radius of the movable contact 3 is greater than the thickness of the insulating valve 4, so that the movable contact 3 can Glides on smoothly. There are ventilation holes on the outer end surface of the static contact 6, so as to facilitate the rapid discharge of the gas in the static contact 6 when the movable contact 3 is working, and reduce the pressure in the inner cavity of the static contact 6. The detonating device 1 is composed of an electric squib 1.1, a squib sheath 1.2 and a detonating device base 1.3. The plastic insulating material of the insulating valve 4 is polyoxymethylene, polyamide or polytetrafluoroethylene.

Embodiment 2: Different from Embodiment 1, the insulation valve 4 in this embodiment has a thickness of 1.2 mm, 6 grooves 4.1, a width of 0.8 mm, and a depth of 0.5 mm. The plastic insulating material of the insulating valve 4 is polyamide.

The basic working process of the present invention is as follows:

When the trigger signal reaches the detonating device 1, the trigger unit of the electric detonator 1.1 immediately sends out the detonation signal to detonate the electric detonator 1.1, and under the action of the impact force generated by the explosion, the movable contact 3 in the inner cavity of the base 2 overcomes the pressure of the insulating valve 4 The resistance moves axially, and the movable contact 3 quickly contacts the static contact 6 by compressing the electrical contact ring 7 in the groove of the static contact 6, and the switch is completely closed.

The protection scope of the present invention is not limited to the above-mentioned embodiments.

Claims (8)

1. explosion type closed switch, it is characterized in that, it comprises an insulating sleeve (5), one axis hole shoulder (5.1) is arranged in its inner chamber, one side of this axis hole shoulder (5.1) has a fixed contact as main circuit conductor (6), and opposite side has a base as conductor (2); This base (2) inner chamber is equipped with igniter (1) from outside to inside, moving contact (3); This moving contact (3) has a sliding cavity (2.1) between the end face of the end face of an end of axis hole shoulder (5.1) and fixed contact (6); Between one end of moving contact (3) and the axis hole shoulder (5.1) isolation valve (4) is arranged; The inner chamber of fixed contact (6) and base (2) has a groove, is equipped with respectively one in this groove and electrically contacts ring (7).

2. explosion type closed switch as claimed in claim 1, it is characterized in that, the ring (7) that electrically contacts of described fixed contact (6) leans on the endoporus mouth diameters of moving contact (3) one ends greater than moving contact (3) external diameter, so that moving contact (3) enters electrically contacting in the ring (7) of fixed contact (6) in the clear.

3. explosion type closed switch as claimed in claim 1 is characterized in that, electrically contact its initial inside diameter of ring (7) and the moving contact (3) that are equipped with respectively in the lumen channels of described fixed contact (6) and base (2) are interference fit.

4. explosion type closed switch as claimed in claim 1 is characterized in that, described isolation valve (4) is annular, and hoop is a plurality of grooves of radial even distribution outward in it, and interior ring diameter is less than moving contact (3) external diameter.

5. explosion type closed switch as claimed in claim 1 is characterized in that, the difference of the inside radius of the axis hole shoulder (5.1) in described insulating sleeve (5) inner chamber and the outer radius of moving contact (3) is greater than the thickness of isolation valve (4).

6. explosion type closed switch as claimed in claim 1 is characterized in that, described fixed contact (6) has air vent hole on the outer face.

7. explosion type closed switch as claimed in claim 1 is characterized in that, described igniter (1) is comprised of electric detonator (1.1), electric detonator sheath (1.2) and igniter base (1.3).

8. explosion type closed switch as claimed in claim 1 is characterized in that, described isolation valve (4)

Plastic insulating material select polyformaldehyde, or polyamide, or polytetrafluoroethylene.

Images