CN221079925U - Drop-out quick-break switch - Google Patents

Abstract

The utility model provides a drop-out quick-break switch, which relates to the technical field of power equipment and comprises an insulating porcelain bottle, wherein contacts are arranged at the upper end and the lower end of the insulating porcelain bottle, an upper contact component and a lower contact component which are connected with the contacts, and a fusion pipe which is connected between the contacts; the short circuit assembly comprises a conducting strip attached to one side of the contact, and a connecting piece arranged on the side of the conducting strip, and the pulling assembly drives the connecting piece to attach or keep away from the conducting strip. According to the utility model, the telescopic spring is heated and expanded to automatically short the fusion pipe, so that the fusion pipe can be directly disassembled and replaced.

Description

Drop-out quick-break switch

Technical Field

The utility model relates to the technical field of power equipment, in particular to a drop-out quick-break switch.

Background

Drop-out fuses are one of the common switching devices used for circuit breaking protection, and are often installed in power systems of 35kv and below. The drop-out fuse breaks the circuit by means of "fuse blowing" to protect the circuit. When the system fails, the fault current causes the fuse to be quickly blown and form an electric arc, the fusion pipe is burnt by the electric arc, a large amount of gas is decomposed, high pressure is formed in the pipe, longitudinal blowing is formed along the pipeline, and the electric arc is quickly elongated and extinguished. The existing drop-out fuse needs to be replaced after power failure after the protection of a broken circuit, and is practical and inconvenient.

Disclosure of utility model

The utility model aims to: the present utility model is directed to the above drawbacks, and provides a drop-out quick-break switch to solve the above problems in the prior art.

The technical scheme is as follows: the drop-out quick-break switch comprises an insulating porcelain bottle, wherein the upper end and the lower end of the insulating porcelain bottle are provided with contacts, an upper contact assembly, a lower contact assembly and a fusion tube, wherein the upper contact assembly and the lower contact assembly are connected with the contacts, and the fusion tube is connected between the contacts;

the short circuit assembly comprises a conducting strip attached to one side of the contact, and a connecting piece arranged on the side of the conducting strip, and the pulling assembly drives the connecting piece to attach or keep away from the conducting strip.

In a further embodiment, the connector comprises: conductive contact terminals and extension plates.

The conductive contact end is arranged opposite to the side surface of the conductive sheet;

The front end of the extension plate is connected with the conductive contact end to form a whole, the extension plate is parallel to the conductive sheet, the tail end of the extension plate is rotationally connected to the protective shell, and the pulling assembly is connected with the extension plate.

In a further embodiment, the conductive contact end is provided with an arc-shaped contact surface, the contact surface protruding closer to the conductive sheet.

In a further embodiment, the pulling assembly comprises: two groups of pull plates and telescopic springs.

The two groups of pull plates are clamped on the extension plate, and limit grooves are formed in the pull plates;

The telescopic springs are arranged between the two groups of pull plates, and the ends of the telescopic springs are correspondingly connected in the limiting grooves respectively.

In a further embodiment, the extension board extends to the middle of the protective housing, the tail ends of the extension board are respectively provided with a clamping groove and a connecting end which are mutually matched and connected, and when the tail ends of the extension board are mutually attached, the connecting ends are connected with the clamping grooves.

In a further embodiment, a buffer assembly is provided below the conductive sheet.

In a further embodiment, the cushioning assembly includes: a connecting plate and a rubber end.

The connecting plate is fixed on the protective shell, is arranged in parallel with the conductive sheet and is positioned at the other side of the conductive contact end;

And the rubber end is vertically fixed on the connecting plate and extends upwards to be close to the conductive contact end.

The beneficial effects are that: the utility model provides a drop-out quick-break switch, which automatically pushes the connection between a wire contact end and a conducting strip to form a short circuit state through the expansion of a telescopic spring by heating, so that a fusion tube can be directly detached and replaced, and the inconvenience of directly cutting off a load or cutting off a power supply is avoided. The extension board is terminal to be connected through link and draw-in groove to keep the short circuit state of certain time, avoid the telescopic spring cooling back, the short circuit state inefficacy provides enough time for changing the fusion tube, and through manual promotion arm-tie, resume device normal operating condition, improve the security. When the conducting strip resets, the rubber end buffers and protects the conducting strip, and the conducting contact end is prevented from being damaged.

Drawings

Fig. 1 is an overall internal construction view of the present utility model with a half of the protective housing removed.

Fig. 2 is a state diagram of the connection of the extension board in the present utility model.

The reference numerals in the drawings are as follows: insulator 1, contact 101, upper contact subassembly 2, lower contact subassembly 3, fusion tube 4, shorting module 5, conducting strip 501, connecting piece 502, conductive contact end 5021, extension plate 5022, draw-in groove 5022a, connecting end 5022b, pulling assembly 6, arm-tie 601, extension spring 602, protective housing 7, buffer assembly 8, connecting plate 801, rubber end 802.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present utility model. It will be apparent, however, to one skilled in the art that the utility model may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the utility model.

Referring to fig. 1, an internal structure schematic diagram of fig. 1 after removing a half part of a protective shell 7, the utility model provides a drop-out quick-break switch, which comprises an insulating porcelain bottle 1, wherein contacts 101 are arranged at the upper end and the lower end of the insulating porcelain bottle 1, an upper contact 101 assembly 2 and a lower contact 101 assembly 3 which are connected with the contacts 101, and a fusion tube 4 which is connected between the contacts 101, wherein a short circuit assembly 5 is arranged at the other side of the insulating porcelain bottle 1, the short circuit assemblies 5 are respectively connected with the other side of the contacts 101 and are connected into a whole through a pulling assembly 6, and when the pulling assembly 6 works, the short circuit assemblies 5 at the two ends are driven to work at the same time, so that a short circuit is formed quickly. The short circuit assembly 5 is arranged opposite to the fusion pipe 4, a protective shell 7 is arranged outside the short circuit assembly 5 and the pulling assembly 6, and the protective shell 7 limits and protects the short circuit assembly 5 and the pulling assembly 6. The shorting assembly 5 comprises a conductive sheet 501 attached to one side of the contact 101, and a connecting piece 502 disposed on the side of the conductive sheet 501, wherein the connecting piece 502 is disposed on the lower side and the upper side of the conductive sheet 501 shown in fig. 1, and the pulling assembly 6 drives the connecting piece 502 to attach to or away from the conductive sheet 501. The conducting strip 501 remains the overlap joint with the contact 101 all the time, and when the electric current exceeded the rating of fuse, pulling subassembly 6 drove connecting piece 502 motion for connecting piece 502 at both ends all laminates with conducting strip 501, and shorting assembly 5 is made for the metal material that has conductive property, and connecting piece 502 and conducting strip 501 touch the time, connecting piece 502 mutual butt that distributes from top to bottom forms the short circuit state, forms the protection to the circuit, can dismantle the change to fusion tube 4 when keeping supplying power.

Further, the connection piece 502 includes a conductive contact end 5021 opposite to the side surface of the conductive sheet 501, and the conductive contact end 5021 is fixed on the extension board 5022 and is formed integrally with the extension board 5022. The front end of the extension plate 5022 is integrally connected with the conductive contact end 5021, the extension plate 5022 is parallel to the conductive sheet 501, the tail end of the extension plate 5022 is rotationally connected to the protective shell 7, and the pulling assembly 6 is connected with the extension plate 5022. The extension plate 5022 is rotationally connected with the shell through the rotating shaft, the connection position of the pulling assembly 6 and the extension plate 5022 is located at the front end of the rotating shaft, and when the pulling assembly 6 works, the extension plate 5022 is driven to move relatively or oppositely, and then the corresponding conductive contact end 5021 is driven to be attached to or disconnected from the conductive sheet 501. The conductive contact 5021 is provided with an arc-shaped contact surface that protrudes adjacent to the conductive tab 501. When the contact surface of the conductive contact terminal 5021 is attached to the conductive plate 501, a line contact is formed, current is uniformly distributed, and current is stably transmitted.

Further, the pulling assembly 6 is specifically provided with two groups of pulling plates 601 and telescopic springs 602, the pulling plates 601 are all clamped on the extending plates 5022, limiting grooves are formed in the pulling plates 601, clamping grooves 5022a are formed in the protective shell 7, two side ends of the pulling plates 601 are located in the clamping grooves 5022a, and the moving direction of the pulling plates 601 is limited. The extension springs 602 are disposed between the two sets of pull plates 601, and ends of the extension springs 602 are respectively and correspondingly connected to the limiting grooves. When the expansion spring 602 expands due to heat, the pull plate 601 is pushed, and the pull plate 601 pushes one end of the extension plate 5022 to rotate around the rotating shaft, and the conductive contact end 5021 at the other end of the extension plate 5022 is attached to the conductive sheet 501. The extension board 5022 extends to the middle part of the protective housing 7 at the position of the rotating shaft, the tail end of the extension board 5022 is respectively provided with a clamping groove 5022a and a connecting end 5022b which are mutually matched and connected, and when the tail ends of the extension board 5022 are mutually attached, the connecting end 5022b is connected with the clamping groove 5022 a. After the extension plate 5022 is expanded and lifted by the extension spring 602, the connecting end 5022b is fixed in the clamping groove 5022a, and a short circuit state is maintained, so that enough time is ensured for replacing the fusion pipe 4. Through holes corresponding to the pull plates 601 are formed in the protective shell 7, the pull plates 601 are raised, then protrude out of the protective shell 7, and after replacement is completed, the pull plates 601 are pressed, so that the connecting ends 5022b are separated from the clamping grooves 5022 a.

Further, a buffer assembly 8 is disposed under the conductive sheet 501. In the initial state of the extension spring 602, the conductive contact end 5021 is far away from the conductive sheet 501, the buffer component 8 supports the conductive contact end 5021, and after the circuit is restored, the conductive contact end 5021 is reversely reset to be in contact with the buffer component 8 to release reverse impact force under the original state of the extension spring 602. The buffer component 8 is specifically provided with a connecting plate 801 and a rubber end 802, wherein the connecting plate 801 is fixed on the protective shell 7, and the connecting plate 801 is arranged in parallel with the conductive sheet 501 and is positioned at the other side of the conductive contact end 5021; the rubber end 802 is vertically fixed to the connection plate 801, and the rubber end 802 extends upward close to the conductive contact end 5021. The connecting plate 801 is arranged in the movement range of the extension plate 5022, the conductive contact end 5021 is propped against the rubber end 802 after moving reversely, the rubber end 802 absorbs part of impact force, the contact part is reduced from being impacted, and the conductive contact end 5021 is protected.

The working mode is as follows: when whole inside bears overcurrent or short-circuit current, heat transfer reaches extension spring 602, and extension spring 602 expands gradually and promotes arm-tie 601 for extension board 5022 upset, extension board 5022 tip's conductive contact end 5021 respectively with conductive plate 501 contact, laminating each other between the extension board 5022 bottom, connecting end 5022b stretches into in the draw-in groove 5022a, forms the short circuit, can directly change fusion tube 4. After the replacement, the pulling plate 601 is manually pressed, at this time, the extension spring 602 cools and recovers, the extension plate 5022 is separated, and the conductive contact end 5021 is stably attached to the rubber end 802.

As described above, although the present utility model has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the utility model itself. Various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (7)

1. The drop-out quick-break switch comprises an insulating porcelain bottle, wherein contacts are arranged at the upper end and the lower end of the insulating porcelain bottle, an upper contact assembly and a lower contact assembly which are connected with the contacts, and a fusion tube which is connected between the contacts;

the short circuit assembly comprises a conducting strip attached to one side of the contact, and a connecting piece arranged on the side of the conducting strip, and the pulling assembly drives the connecting piece to attach or keep away from the conducting strip.

2. The drop-out quick disconnect switch of claim 1, wherein the connector comprises:

The conductive contact end is arranged opposite to the side surface of the conductive sheet;

The front end of the extension plate is connected with the conductive contact end to form a whole, the extension plate is parallel to the conductive sheet, the tail end of the extension plate is rotationally connected to the protective shell, and the pulling assembly is connected with the extension plate.

3. A drop-out quick disconnect switch as defined in claim 2, wherein said conductive contact end has an arc-shaped contact surface, said contact surface being convex adjacent said conductive strip.

4. The drop-out quick disconnect switch of claim 2, wherein the pull assembly comprises:

the two groups of pull plates are clamped on the extension plate, and limit grooves are formed in the pull plates;

The telescopic springs are arranged between the two groups of pull plates, and the ends of the telescopic springs are correspondingly connected in the limiting grooves respectively.

5. The drop-out quick release switch of claim 4 wherein said extension plate extends toward said middle of said protective housing, said extension plate having respective ends provided with a slot and a connecting end for mating engagement therewith, said connecting end being connected to said slot when said extension plate ends are mated with one another.

6. The drop-out quick disconnect switch of claim 2, wherein a buffer assembly is disposed below the conductive sheet.

7. The drop-out quick disconnect switch of claim 6, wherein the buffer assembly comprises:

The connecting plate is fixed on the protective shell, is arranged in parallel with the conductive sheet and is positioned at the other side of the conductive contact end;

And the rubber end is vertically fixed on the connecting plate and extends upwards to be close to the conductive contact end.