CN214477310U

CN214477310U - Fixed contact fixing device for drop switch

Info

Publication number: CN214477310U
Application number: CN202022751468.8U
Authority: CN
Inventors: 张顺喜
Original assignee: Baoding High Energy Power Complete Equipment Co ltd
Current assignee: Baoding High Energy Power Complete Equipment Co ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-10-22
Anticipated expiration: 2030-11-25

Abstract

The utility model provides a drop switch static contact fixing device, belong to drop switch technical field, including the insulating tube, upper bracket and lower carriage are installed respectively at both ends about insulating tube one side, one side that the insulating tube was kept away from to the lower carriage is connected with the copper support, be provided with the lower static contact on the copper support, set up the locating hole that is used for installing the fuse tube on the copper support, the one end that the insulating tube was kept away from to the upper bracket is installed upper static contact support, upper static contact support installs the upper static contact through the spring, upper static contact support both sides all install the slide rail, the one end of two sets of slide rails all is connected with semi-circular slide rail, the one end of two sets of semi-circular slide rails all is connected with upper static contact support fixed connection, sliding mounting has the slide bar above two sets of slide rails, the stopper is all installed at the slide bar both ends; the fuse tube is positioned by matching the slide rail, the slide rod and the semicircular slide rail, so that incomplete switching-on of the fuse tube is prevented, and the upper moving contact and the upper static contact of the fuse tube can be prevented from being separated and separated from each other in a natural state.

Description

Fixed contact fixing device for drop switch

Technical Field

The utility model belongs to the technical field of the drop switch, specifically a drop switch static contact fixing device.

Background

The drop-out switch, 10kV/12KV distribution line branch line and the most commonly used short-circuit protection switch of distribution transformer. The device has the characteristics of economy, convenient operation, strong adaptability to outdoor environment and the like, and is widely applied to one side of a 10kV/12kV distribution line and a distribution transformer for protection and equipment throwing and cutting operation. The high-voltage distribution line branch line breaker is arranged on a high-voltage distribution line branch line, can reduce the power failure range, has the function of an isolating switch due to the fact that the breaker has an obvious disconnection point, creates a safe operation environment for a maintenance section line and equipment, and increases the safety of maintenance personnel. Mounted on distribution transformers, they are used as main protection for distribution transformers, and are therefore widespread in high-voltage distribution lines and distribution transformers.

The moving contacts at two ends of the fuse tube are tied tightly by means of a fuse wire (melt), after the upper moving contact is pushed into the convex part of the 'duckbill', the upper fixed contact made of phosphor copper sheets and the like props against the upper moving contact, and therefore the fuse tube is clamped in the 'duckbill'. When the short-circuit current is fused through the fuse wire, an electric arc is generated, a steel paper tube lined in the fuse tube generates a large amount of gas under the action of the electric arc, the gas is sealed due to the upper end of the fuse tube, and the gas is sprayed out to the lower end to blow out the electric arc. As the fuse wire is fused, the upper and lower moving contacts of the fuse tube lose the fastening force of the fuse wire, and the fuse tube falls rapidly under the action of the gravity of the fuse tube and the spring pieces of the upper and lower static contacts, so that a circuit is disconnected, and a fault section line or fault equipment is cut off.

However, in the prior art, when the drop switch is switched on, situations such as incomplete switching-on due to improper operation may occur, which may cause an excessively large resistance of the static contact and the moving contact, resulting in a temperature increase, thereby causing a bad influence on the line.

SUMMERY OF THE UTILITY MODEL

To the not enough of above-mentioned prior art, the embodiment of the utility model provides a technical problem who solves provides a drop switch static contact fixing device.

In order to solve the technical problem, the utility model provides a following technical scheme:

a fixed contact fixing device of a drop switch comprises an insulating tube, wherein an upper bracket and a lower bracket are respectively arranged at the upper end and the lower end of one side of the insulating tube, a copper bracket is connected to one side of the lower bracket, which is far away from the insulating tube, a lower fixed contact is arranged on the copper bracket, a wire outlet end is arranged below the copper bracket, a positioning hole for installing a fuse tube is formed in the copper bracket, an upper fixed contact support is arranged at one end of the upper bracket, which is far away from the insulating tube, a wire inlet end is arranged above the upper fixed contact support, a spring is arranged below the upper fixed contact support, an upper fixed contact is arranged at the bottom of the spring, slide rails are arranged at two sides of the upper fixed contact support, semicircular slide rails are connected to one ends of the two groups of slide rails, which are far away from the upper fixed contact support, and one ends of the two groups of semicircular slide rails, which are far away from the slide rails, are fixedly connected with one side of the upper fixed contact support, which is far away from the insulating tube, two sets of sliding rail top slidable mounting has the slide bar, the stopper is all installed at the slide bar both ends.

As a further improvement of the utility model: and the upper static contact support is tangent to the plane where one end of the sliding rail far away from the insulating tube is located.

As a further improvement of the utility model: and the axis of the positioning hole is vertically intersected with the axis of the upper static contact.

As a further improvement of the utility model: the separation device comprises a connecting plate, one end of the connecting plate is connected to the bottom of the upper static contact support, and a U-shaped connecting sheet is installed at one end, far away from the upper static contact support, of the connecting plate.

As a further improvement of the present invention: the U-shaped connecting sheet is made of elastic metal materials.

Compared with the prior art, the beneficial effects of the utility model are that:

the fuse tube is positioned by matching the slide rail, the slide rod and the semicircular slide rail, so that incomplete switching-on of the fuse tube is prevented, and an upper moving contact and an upper static contact of the fuse tube can be prevented from being separated and separated in a natural state; through the cooperation that sets up connecting plate and U type connecting plate and using for the speed that the fuse tube falls naturally, prevent that the separating brake is not thorough.

Drawings

Fig. 1 is a schematic structural view of a fixed contact fixing device of a drop switch;

FIG. 2 is a front view of the device of FIG. 1;

fig. 3 is a schematic structural view of an upper fixed contact in a fixed contact fixing device of a drop switch;

in the figure: 1-insulating tube, 2-upper bracket, 3-lower bracket, 4-copper bracket, 5-outlet terminal, 6-positioning hole, 7-upper static contact support, 8-spring, 9-upper static contact, 10-sliding rail, 11-sliding bar, 12-limiting block, 13-connecting plate, 14-U-shaped connecting plate, 15-inlet terminal and 16-semicircular sliding rail.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Example 1

Referring to fig. 1-3, the present embodiment provides a fixed contact fixing device for a drop switch, including an insulating tube 1, an upper bracket 2 and a lower bracket 3 are respectively installed at upper and lower ends of one side of the insulating tube 1, a copper bracket 4 is connected to one side of the lower bracket 3 away from the insulating tube 1, a lower fixed contact is installed on the copper bracket 4, a wire outlet 5 is installed below the copper bracket 4, a positioning hole 6 for installing a fuse tube is formed in the copper bracket 4, an upper fixed contact support 7 is installed at one end of the upper bracket 2 away from the insulating tube 1, a wire inlet end 15 is installed above the upper fixed contact support 7, a spring 8 is installed below the upper fixed contact support 7, an upper fixed contact 9 is installed at the bottom of the spring 8, slide rails 10 are installed at both sides of the upper fixed contact support 7, and semicircular slide rails 16 are connected to one ends of two sets of slide rails 10 away from the upper fixed contact support 7, one ends, far away from the slide rail 10, of the two groups of semicircular slide rails 16 are fixedly connected with one side, far away from the insulating tube 1, of the upper static contact support 7, slide bars 11 are slidably mounted above the two groups of slide rails 16, and limiting blocks 12 are mounted at two ends of each slide bar 11.

The bottom of a fuse tube is arranged in a positioning hole 6 through a rotating shaft, a lower moving contact at the bottom of the fuse tube is abutted to a lower static contact, when the fuse tube is switched on upwards, a sliding rod 11 is moved into a semicircular sliding rail 16 and then the fuse tube is rotated to be switched on, the sliding rod 11 and a limiting block 12 are abutted to the fuse tube to prevent the fuse tube from being separated due to wind power and the like, the top of an upper static contact 9 is connected with the bottom of an upper static contact support 7 through a spring 8 to prevent the upper moving contact of the fuse tube from being separated from the upper static contact 9 and switched on naturally, the fuse tube can be positioned through the sliding rod 10 to prevent the phenomenon of non-in-place.

Furthermore, the upper static contact support 7 is tangent to a plane where one end of the sliding rail 10 away from the insulating tube 1 is located, so that the sliding rod 11 can just abut against the fuse tube, the fuse is prevented from being burnt off when the current is too large, but the sliding rod 11 abuts against the fuse tube, and the switching cannot be switched off.

Furthermore, the axis of the positioning hole 6 is perpendicularly intersected with the axis of the upper static contact 9, so that the contact area between the upper static contact 9 and the upper moving contact of the fuse tube is sufficient.

Example 2

Referring to fig. 2, in the present embodiment, compared with embodiment 1, the fixed contact fixing device for a drop switch further includes a separating device, the separating device includes a connecting plate 13, one end of the connecting plate 13 is connected to the bottom of the upper fixed contact support 7, one end of the connecting plate 13, which is far away from the upper fixed contact support 7, is installed with a U-shaped connecting plate 14, the U-shaped connecting plate 14 is made of an elastic metal material, and when a fuse tube is opened due to an excessive current in the fuse tube burning off a fuse, the U-shaped connecting plate 14 releases an elastic potential energy of the pressed fuse tube, so that a speed of the fuse tube dropping naturally is increased, and incomplete opening is prevented.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. A fixed contact fixing device of a drop switch comprises an insulating tube (1), wherein an upper support (2) and a lower support (3) are respectively installed at the upper end and the lower end of one side of the insulating tube (1), and is characterized in that one side, far away from the insulating tube (1), of the lower support (3) is connected with a copper support (4), a lower fixed contact is arranged on the copper support (4), a wire outlet end (5) is installed below the copper support (4), a positioning hole (6) for installing a fuse tube is formed in the copper support (4), an upper fixed contact support (7) is installed at one end, far away from the insulating tube (1), of the upper support (2), a wire inlet end (15) is installed above the upper fixed contact support (7), a spring (8) is installed below the upper fixed contact support (7), an upper fixed contact (9) is installed at the bottom of the spring (8), slide rails (10) are installed on two sides of the upper fixed contact support (7), the end, far away from the upper static contact support (7), of each of the two groups of slide rails (10) is connected with a semicircular slide rail (16), the end, far away from the slide rail (10), of each of the two groups of semicircular slide rails (16) is fixedly connected with one side, far away from the insulating tube (1), of the upper static contact support (7), a slide bar (11) is slidably mounted above the two groups of slide rails (10), and limiting blocks (12) are mounted at two ends of the slide bar (11).

2. The fixed contact fixing device of a drop switch according to claim 1, wherein the upper fixed contact support (7) is tangent to a plane where one end of the sliding rail (10) away from the insulating tube (1) is located.

3. The fixed contact fixing device of a drop switch according to any one of claims 1-2, wherein the axis of the positioning hole (6) is perpendicular to the axis of the upper fixed contact (9).

4. The fixed contact fixing device of a drop switch according to claim 1, further comprising a separating device, wherein the separating device comprises a connecting plate (13), one end of the connecting plate (13) is connected to the bottom of the upper fixed contact support (7), and one end of the connecting plate (13) far away from the upper fixed contact support (7) is provided with a U-shaped connecting sheet (14).

5. A fixed contact fixing device of a drop switch according to claim 4, characterized in that the U-shaped connecting piece (14) is made of elastic metal material.