CN211578629U - Transmission structure and three-position switch using same - Google Patents

Abstract

The utility model belongs to the technical field of gas-insulated high-voltage switchgear, specifically disclose a transmission structure, including first sprocket, second sprocket, third sprocket and chain, first sprocket, second sprocket and third sprocket are fixed respectively on the left side looks main shaft, mesophase main shaft and the right side looks main shaft; the first chain wheel, the second chain wheel and the third chain wheel are in transmission connection through the chain. Above-mentioned transmission structure can solve the problem that the not good phenomenon of three-phase divide-shut brake synchronism often appears in transmission system structure, the actual operation in-process between current three-station switch and operating device.

Description

Transmission structure and three-position switch using same

Technical Field

The utility model belongs to the technical field of gas-insulated high tension switchgear, especially, relate to a transmission structure and use three station switches of this structure.

Background

Compared with the traditional air-insulated switch cabinet, the gas-insulated metal-enclosed switch cabinet has the advantages of more compact structure, safer and more reliable operation, and is widely applied to the field of power transmission and distribution. The three-position switch is simple in structure, safe and reliable, and is widely applied to the gas insulation switch cabinet.

And a three-position switch, 3PS for short in English, namely 3position switchgear. The three-position switch represents a switching-on position with a main fracture of the isolating switch switched on, a switching-off position with the main fracture separated and a grounding position on a grounding side. The isolating switch bears normal working current of a main circuit during switching-on or bears short-time rated short-circuit current during fault, the isolating fracture bears high voltage during switching-off, the grounding switch bears fracture voltage during switching-off, and the grounding circuit is reliably grounded during switching-on, so that the safety of personnel and equipment is ensured.

The three-station switch generally comprises an isolation static contact, a moving contact, a grounding static contact, a middle fixed conductor, an insulating screw rod, a contact finger, a transmission system, an operating mechanism and other parts, wherein the operating mechanism drives a three-phase insulating screw rod to synchronously rotate through the transmission system, and the insulating screw rod pushes each phase of moving contact to linearly move, so that the three-phase synchronous opening and closing operation of the switch is realized.

The prior transmission system between the three-position switch and the operating mechanism is shown in figures 1 and 2: the left side phase main shaft, the middle phase main shaft, the right side phase main shaft and the middle phase main shaft synchronously rotate through two chain wheels I, a tension wheel I, two chain wheels II and a chain I, the two chain wheels I are jointly fixed on the middle phase main shaft, the two chain wheels II are respectively fixed on the left side phase main shaft and the right side phase main shaft, and an operating mechanism drives any main shaft, so that synchronous rotation of the three-phase main shafts is realized.

The transmission system between the existing three-position switch and the operating mechanism has a complex structure, more parts are used, the installation is complex, and the phenomenon of poor synchronism of three-phase opening and closing is frequently generated in the actual operation process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a transmission structure to solve the problem of the not good phenomenon of three-phase divide-shut brake synchronism often appears in transmission system structure, the actual operation in-process between current three-station switch and operating device.

In order to achieve the above purpose, the technical scheme of the utility model is that: a transmission structure comprises a first chain wheel, a second chain wheel, a third chain wheel and a chain, wherein the first chain wheel, the second chain wheel and the third chain wheel are respectively fixed on a left phase main shaft, a middle phase main shaft and a right phase main shaft; the first chain wheel, the second chain wheel and the third chain wheel are in transmission connection through the chain.

The chain-driven three-station switch is characterized by further comprising a tension wheel and a rotating shaft, wherein the rotating shaft is rotatably connected in the three-station switch, the tension wheel is fixed on the rotating shaft, and the tension wheel is in transmission connection with the first chain wheel, the second chain wheel and the third chain wheel through the chain.

The working principle of the technical scheme is as follows: the operating mechanism drives the left side phase main shaft, the right side phase main shaft or the middle phase main shaft, and synchronous rotation can be realized through the first chain wheel, the second chain wheel, the third chain wheel and the tension wheel, so that three-phase synchronous rotation is realized.

The beneficial effects of this technical scheme lie in: compared with the prior art, the structure has the advantages that the number of required parts is small, the movement is more reliable, and the three-phase opening and closing synchronization is good in the actual operation process.

The three-station switch comprises an air box, an insulating support, a conductive bar, an isolating static contact, a moving contact, a middle fixed conductor, an insulator, an insulating cylinder, a grounding static contact, a transmission structure and an operating mechanism, wherein the insulating support, the conductive bar, the isolating static contact, the moving contact, the middle fixed conductor, the insulator, the insulating cylinder and the grounding static contact are sequentially arranged in the air box, the transmission structure and the operating mechanism are arranged outside the air box, the insulating support is fixed on one side of the air box, the insulator is fixed at the bottom of the air box, the conductive bar is fixed on the insulating support, the isolating static contact is fixed on the conductive bar, two sides of the moving contact are respectively connected with the isolating static contact and the middle fixed conductor, the middle fixed conductor is fixed on the insulator.

Further, the air box comprises a supporting plate, and the insulating support is fixed on one side of the air box through the supporting plate.

Further, the insulator comprises a flange plate, and the insulator is fixed at the bottom of the air box through the flange plate.

Further, the power strip comprises a first bolt, and the conducting strip is fixed on the insulating support column through the first bolt.

And the isolating static contact is fixed on the conducting bar through the second bolt.

The working principle of the technical scheme is as follows: the operating mechanism drives the three phases of the insulated screw rods to rotate simultaneously through the transmission structure, and each phase of the insulated screw rods drives the respective moving contact to realize linear motion.

Drawings

FIG. 1 is a front view of a prior art transmission system;

FIG. 2 is a top view of FIG. 1;

fig. 3 is a front view of a transmission structure of the present invention;

FIG. 4 is a top view of FIG. 3;

fig. 5 is a schematic structural diagram of a three-position switch of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a left side phase main shaft 1, a middle phase main shaft 2, a right side phase main shaft 3, a chain I4, a tension pulley I5, a chain wheel II 6, a chain wheel I7, a tension pulley 8, a chain 9, a rotating shaft 10, a third chain wheel 11, a first chain wheel 12, a second chain wheel 13, a supporting plate 14, an air box 15, an insulating support column 16, a conducting bar 17, an isolating static contact 18, a moving contact 19, a middle fixed conductor 20, an insulator 21, an insulating cylinder 22, a grounding static contact 23, a transmission structure 24 and an operating mechanism 25.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

Substantially as shown in figures 3-4: a transmission structure comprises a first chain wheel 12, a second chain wheel 13, a third chain wheel 11, a tension wheel 8, a rotating shaft 10 and a chain 9, wherein the first chain wheel 12, the second chain wheel 13 and the third chain wheel 11 are respectively fixed on a left phase main shaft 1, a middle phase main shaft 2 and a right phase main shaft 3; first sprocket 12, second sprocket 13, third sprocket 11 and take-up pulley 8 pass through chain 9 transmission and connect, and pivot 10 rotates to be connected in three station switches, and take-up pulley 8 is fixed on pivot 10.

The specific implementation process is as follows:

the operating mechanism 25 drives the left-side phase main shaft 1, the right-side phase main shaft 3 or the middle-phase main shaft 2, and can synchronously rotate through the first chain wheel 12, the second chain wheel 13, the third chain wheel 11 and the tension wheel 8, so that three-phase synchronous rotation is realized.

Example two

Referring to fig. 5, a three-position switch includes an air box 15, a supporting plate 14, an insulating pillar 16, a conducting bar 17, an isolating static contact 18, a moving contact 19, a middle fixed conductor 20, an insulator 21, a flange plate, an insulating cylinder 22, a grounding static contact 23, a transmission structure 24 and an operating mechanism 25, wherein the supporting plate 14, the insulating pillar 16, the insulating static contact 18, the moving contact 19, the middle fixed conductor 20, the insulator 21, the flange plate, the insulating cylinder 22, the grounding static contact 23, the transmission structure 24 and the operating mechanism 25 are sequentially disposed in the air box 15, the insulating pillar 16 is fixed on one side of the air box 15 through the supporting plate 14, the insulator 21 is fixed on the bottom of the air box 15 through the flange plate, the conducting bar 17 is fixed on the insulating pillar 16 through a first bolt, the isolating static contact 18 is fixed on the conducting bar 17 through a second bolt, two sides of the moving contact 19 are, the operating mechanism 25 is used for driving the transmission mechanism 24 to operate.

The specific implementation process is as follows:

the operating mechanism 25 drives the three phases of the insulated lead screws to rotate simultaneously through the transmission structure 24, and each phase of the insulated lead screws drives the respective moving contact 19 to realize linear motion.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only for the embodiments of the present invention, and the common general knowledge of the known specific structures and characteristics in the schemes is not described herein too much, and those skilled in the art will know all the common technical knowledge in the technical field of the present invention before the application date or the priority date, can know all the prior art in this field, and have the ability to apply the conventional experimental means before this date, and those skilled in the art can combine their own ability to perfect and implement the schemes, and some typical known structures or known methods should not become obstacles for those skilled in the art to implement the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (7)

1. A transmission structure is characterized in that: the chain transmission device comprises a first chain wheel, a second chain wheel, a third chain wheel and a chain, wherein the first chain wheel, the second chain wheel and the third chain wheel are respectively fixed on a left phase main shaft, a middle phase main shaft and a right phase main shaft; the first chain wheel, the second chain wheel and the third chain wheel are in transmission connection through the chain.

2. A transmission arrangement according to claim 1, wherein: the chain-driven three-station switch is characterized by further comprising a tension wheel and a rotating shaft, wherein the rotating shaft is rotatably connected in the three-station switch, the tension wheel is fixed on the rotating shaft, and the tension wheel is in transmission connection with the first chain wheel, the second chain wheel and the third chain wheel through the chain.

3. A three-position switch using a transmission structure according to any one of claims 1 and 2, wherein: the gas tank comprises a gas tank, an insulating support, a conductive bar, an isolating static contact, a moving contact, an intermediate fixed conductor, an insulator, an insulating cylinder, a grounding static contact, a transmission structure and an operating mechanism, wherein the insulating support, the conductive bar, the isolating static contact, the moving contact, the intermediate fixed conductor, the insulator, the insulating cylinder and the grounding static contact are sequentially arranged in the gas tank, the transmission structure and the operating mechanism are arranged outside the gas tank, the insulating support is fixed on one side of the gas tank, the insulator is fixed at the bottom of the gas tank, the conductive bar is fixed on the insulating support, the isolating static contact is fixed on the conductive bar, two sides of the moving contact are respectively connected with the isolating static contact and the intermediate fixed conductor, the intermediate fixed conductor is fixed.

4. A transmission construction according to claim 3, wherein: the air box comprises a supporting plate, wherein the insulating support column is fixed on one side of the air box through the supporting plate.

5. A transmission construction according to claim 3, wherein: the insulator is fixed at the bottom of the gas box through the flange plate.

6. A transmission construction according to claim 3, wherein: the conductive bar is fixed on the insulating support column through the first bolt.

7. A transmission construction according to claim 3, wherein: the isolating static contact is fixed on the conducting bar through the second bolt.

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