CN102005337A - Explosive circuit breaker - Google Patents

Abstract

The invention relates to an explosive circuit breaker, which is suitable for various electric control occasions, especially for automatic control of marine electrics. It consists of an insulating sleeve, at least two mutually insulated conductive seats fixed in one end of the insulating sleeve as the main circuit electrode conductor, and one installed in the inner cavity of one end of the conductive seat to push the moving contact. The detonating device; the moving contact is composed of a conductor and an insulator, and the insulator is close to the detonating device; the end face of the conductor is facing the sliding cavity for moving the moving contact at the opposite end of the insulating sleeve where the conductive seat is installed. The invention has the advantages of small size, light weight, simple structure, impact resistance, fast breaking speed, high reliability and convenient maintenance.

Description

Explosive disconnect switch

technical field

The invention relates to an explosive circuit breaking switch, which is a normally closed 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 or the spring mechanism to make the moving contact go through a certain stroke to realize the contact disconnection. When the current-carrying part has a certain current-carrying capacity per unit volume, because the traditional contactor needs a volume relative to the current-carrying The driving mechanism with several times of components has caused the overall size and quality of traditional contactors to be unable to be further reduced. Moreover, due to the limitation of its own structure, volume and quality, the traditional low-voltage contactor cannot withstand the environment of high shock and vibration. As a protective switch used in marine electric control, it is required that the switch must have the characteristics of fast disconnection speed, small weight and volume, impact resistance and high reliability, and the existing mechanical switches cannot meet the requirements.

The explosive circuit breaker with the patent No. ZL200820067360.3 is significantly smaller than the traditional low-voltage contactor, but due to its structural limitation, its breaking voltage level cannot be further improved.

Contents of the invention

The object of the present invention is to provide an explosive circuit breaker with small size, light weight, simple structure, impact resistance, fast breaking speed, high reliability and convenient maintenance.

Technical scheme of the present invention is as follows:

An explosive circuit breaker, which includes an insulating sleeve, at least two conductive seats insulated from each other and fixed in the inner cavity at one end of the insulating sleeve as the main circuit electrode conductor, and one installed in the inner cavity at one end of the conductive seat for The detonating device is used to push the moving contact to move; the moving contact is composed of a conductor and an insulator, and the insulator is close to the detonating device; the end face of the conductor is facing the opposite end of the conductive seat of the insulating sleeve for moving the moving contact sliding cavity.

Said explosive circuit breaker, its conductive seat is composed of a terminal block and an arc-shaped conductive tile; the outer contour surface of the arc-shaped conductive tile fits with the inner cavity wall of the insulating sleeve, and the inner contour of the arc-shaped conductive tile The surface fits the outer surface of the moving contact.

In the explosive disconnect switch, the terminal and the arc-shaped conductive tile are cast or welded as a whole.

In the explosive circuit breaker, the section of the inner cavity of the insulating sleeve is in the shape of "8".

The explosive disconnect switch has two conductive seats, one of which is a first-level conductive seat, and the other is a second-level conductive seat, which are used to connect to corresponding electrodes in the circuit respectively.

In the explosive circuit breaker, the conductive seat is fixed in the inner cavity of the insulating sleeve by positioning screws, or the conductive seat is tightly fitted and pressed into the inner cavity of the insulating sleeve; the conductive seat and the moving contact For interference fit connections.

In the explosive circuit breaker, the sliding cavity of the insulating sleeve and the moving contact are in clearance fit, and the clearance is less than or equal to 0.5 mm.

In the explosive circuit breaker described above, there are vent holes on the outer end surface of the sliding cavity of the insulating sleeve.

The insulating sleeve and the insulator of the moving contact of the explosive circuit breaker are made of arc-resistant insulating material; the conductive seat is made of high-strength conductive material.

The basic working principle of the explosive circuit breaker is that it utilizes the characteristics of fast explosion response and strong working ability of explosives. When the electrical system needs to be protected, the trigger signal detonates the explosives to quickly blow off and move the moving contacts to achieve protection. purpose of the electrical system. That is: due to the huge impact force produced by the electric squib when it explodes, the movable contact between the conductive seats will move axially, the insulating part of the movable contact will quickly contact with the conductive seat, and the switch will be completely disconnected.

The advantages and technical effects of the invention are: simple structure, impact resistance, fast breaking speed, high reliability and convenient maintenance; the explosive circuit breaking switch is suitable for various electric control occasions, especially for automatic control of ship power. Explosive circuit breaker can withstand the impact of hundreds of gravitational inertial acceleration because the moving contact and the conductive seat are interference fit. Therefore, no matter the switch is in the non-working state or working state, it can withstand the instantaneous hundreds of gravitational inertial acceleration shock. At the same time, because the invention has a multi-fracture structure, its disconnectable voltage level is significantly improved.

Description of drawings

Fig. 1 is the axial sectional schematic diagram of an embodiment of the present invention;

Fig. 2 is the C-C sectional view of Fig. 1, namely through the gap space of insulating sleeve, the end surface of conductive seat and the shoulder of the shaft hole of insulating sleeve, the transverse sectional view of the conductor of moving contact, the hollow of the insulating sleeve of this embodiment Some are in the shape of "8";

Fig. 3 is A-A sectional view of Fig. 1;

Fig. 4 is a B-B sectional view of Fig. 1 .

The component names of each figure number in the figure are:

1—conductive seat, 1.1—first-level conductive seat 1.2—second-stage conductive seat, 1.3—connecting terminal, 1.4—arc-shaped conductive tile, 2—detonating device, 3—electric squib, 4—moving contact, 4.1 —Insulator, 4.2—Conductor, 5—Insulating sleeve, 5.1—Moving contact moving cavity, 5.2—Aeration hole, 6—Gap space.

Detailed ways

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

Embodiment 1: As shown in Figure 1-3: an explosive circuit breaker, it has an insulating sleeve 5, two mutually insulated conductive seats fixed in the cavity at one end of the insulating sleeve 5 as the main circuit electrode conductor 1. There is also a detonating device 2 installed in the cavity at one end of the conductive seat 1 to push the moving contact 4 to move; the moving contact 4 is composed of a conductor 4.2 and an insulator 4.1, and the insulator 4.1 is close to the detonating device 2; conductive The end face of the body 4.2 is facing the sliding cavity 5.1 for moving the movable contact 4 at the opposite end of the insulating sleeve 5 where the conductive seat 1 is installed. The conductive seat 1 is composed of a connecting terminal 1.3 and an arc-shaped conductive tile 1.4; the outer contour surface of the arc-shaped conductive tile 1.4 fits with a section of the inner cavity wall of the insulating sleeve 5, and the fitting surface is close to the outer end surface. The length is one-third or half of the total length of the arc-shaped conductive tile 1.4; the part where the arc-shaped conductive tile 1.4 is not attached to the inner wall of the insulating sleeve 5, and the end face of the conductive tile 1.4 and the shoulder of the shaft hole of the insulating sleeve 5, There is a gap space 6; the inner contour surface of the arc-shaped conductive tile 1.4 fits with the outer surface of the movable contact 4. The connecting terminal 1.3 and the arc-shaped conductive tile 1.4 are integrally cast or welded. The section of the inner cavity of the insulating sleeve 5 is "8" shape. There are two conductive bases 1, one of which is the first-level conductive base 1.1, and the other is the second-level conductive base 1.2, which are used to connect with corresponding electrodes in the circuit respectively. The conductive seat 1 is fixed in the inner cavity of the insulating sleeve (5) by positioning screws; the conductive seat 1 and the movable contact 4 are connected by an interference fit. The sliding chamber 5.1 of the insulating sleeve 5 and the movable contact 4 are clearance fits, and the clearance is 0.5 millimeters, or 0.3 millimeters. There are ventilation holes 5.2 on the outer end surface of the sliding cavity 5.1 of the insulating sleeve 5 . The insulator 4.1 of the insulating sleeve 5 and the moving contact 4 is an arc-resistant insulating material selected from unsaturated polyester glass fiber reinforced molding compound; the conductive seat 1 is a high-strength conductive material selected from chrome bronze. This embodiment is a double-break structure, and the breakable voltage level is significantly higher than that of the single-break structure.

Embodiment 2: Different from Embodiment 1, the sliding cavity 5.1 of the insulating sleeve 5 and the movable contact 4 are in clearance fit, and the clearance is 0.2 mm. The insulator 4.1 of the insulating sleeve 5 and the moving contact 4 is an arc-resistant insulating material selected from epoxy laminated glass; the conductive material of the conductive seat 1 is selected from red copper.

Protection scope of the present invention is not limited to above-mentioned embodiment. the

Claims (9)

1. explosion type disconnect, it is characterized in that, it comprises an insulating sleeve (5), at least two mutually insulateds be fixed in insulating sleeve (5) the one end inner chambers conductive seat (1) as the major loop electrode conductor, also have one to be installed in and to be used to promote the igniter (2) that moving contact (4) moves in conductive seat (1) the one end inner chamber; Moving contact (4) is made up of electric conductor (4.2) and insulator (4.1), and this insulator (4.1) is near igniter (2); The end face of electric conductor (4.2) is over against the installation conductive seat (1) of insulating sleeve (5) sliding cavity (5.1) that moving contact (4) moves that is used for relative to an end.

2. explosion type disconnect as claimed in claim 1 is characterized in that, described conductive seat (1) is made up of binding post (1.3) and arc Conductive holding element (1.4); The outer surface of this arc Conductive holding element (1.4) and insulating sleeve (5) internal chamber wall have one section to fit, and the outer surface of the interior contoured surface of arc Conductive holding element (1.4) and moving contact (4) fits.

3. explosion type disconnect as claimed in claim 2 is characterized in that, described binding post (1.3) and arc Conductive holding element (1.4) integral body for being cast into, or the integral body that is welded into.

4. explosion type disconnect as claimed in claim 1 is characterized in that, the inner chamber section of described insulating sleeve (5) is the figure of eight.

5. explosion type disconnect as claimed in claim 1 is characterized in that, described conductive seat (1) has two, and one of them is first order conductive seat (1.1), and another is second level conductive seat (1.2), is used for being connected with the circuit respective electrode respectively.

6. explosion type disconnect as claimed in claim 1 is characterized in that, described conductive seat (1) is to be fixed in the inner chamber of insulating sleeve (5) by dog screw, or conductive seat (1) is that tight fit is pressed in the inner chamber of insulating sleeve (5); Described conductive seat (1) is connected for interference fit with moving contact (4).

7. explosion type disconnect as claimed in claim 1 is characterized in that, the sliding cavity (5.1) of described insulating sleeve (5) is a matched in clearance with moving contact (4), and the gap is smaller or equal to 0.5 millimeter.

8. explosion type disconnect as claimed in claim 1 is characterized in that, on sliding cavity (5.1) outer face of described insulating sleeve (5) air vent hole (5.2) is arranged.

9. explosion type disconnect as claimed in claim 1 is characterized in that, the insulator (4.1) of described insulating sleeve (5) and moving contact (4) is the insulating material of anti-electric arc; Described conductive seat (1) is high-intensity electric conducting material.

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