CN224248538U - Pneumatic isolating change-over switch with self-locking function - Google Patents

Abstract

The application provides a pneumatic isolating change-over switch with a self-locking function, which comprises a supporting seat, a switch body, a pneumatic assembly and a control device, wherein the supporting seat is arranged in a synthetic test voltage loop through an insulating assembly, the switch body comprises a shaft sleeve, a rotating arm and a cutter bar, the shaft sleeve is rotatably arranged on the supporting seat, one end of the rotating arm and one end of the cutter bar are both oppositely arranged on the shaft sleeve, the pneumatic assembly is rotatably arranged on the supporting seat, the telescopic end of the pneumatic assembly is movably connected with the other end of the rotating arm through a first connecting block and is used for driving the shaft sleeve to drive the cutter bar to rotate so that the free end of the cutter bar drives a moving contact in a contact system to contact or separate from a fixed contact in the contact system, and the control device is electrically connected with the pneumatic assembly and is used for controlling the starting or stopping of the pneumatic assembly. The application improves the operation efficiency and the safety of the pneumatic isolating change-over switch.

Description

Pneumatic isolating change-over switch with self-locking function

Technical Field

The application relates to the technical field of power equipment, in particular to a pneumatic isolating change-over switch with a self-locking function.

Background

In the high-voltage power test, the voltage class or the operation mode of the synthetic test loop needs to be frequently switched, and the problems of low response speed, large volume, low reliability and the like exist by adopting the traditional manual or electric switch, so that the isolating change-over switch with quick response, high insulativity and self-locking stability is required particularly for the test of 220kV and above voltage class. Whereas the conventional isolating transfer switch has the following problems:

1) The operation is inconvenient, the manual operation of the isolating change-over switch requires larger manpower, and the operation speed is slower;

2) The insulation performance is insufficient, namely, the insulation performance of the isolating change-over switch can be reduced under the high humidity or polluted environment, so that potential safety hazards are caused;

3) The mechanical life is short, and frequent operation can lead to abrasion of mechanical parts of the isolating change-over switch, thereby influencing the service life.

Based on the above, the application provides a pneumatic isolating change-over switch with a self-locking function.

Disclosure of utility model

The application provides a pneumatic isolating change-over switch with a self-locking function, which is used for solving the technical problems described in the background technology.

In order to solve the technical problems, the application adopts the following technical scheme:

The application provides a pneumatic isolating change-over switch with a self-locking function, which comprises:

The support seat is arranged in the synthetic test voltage loop through the insulation component;

The switch body comprises a shaft sleeve, a rotating arm and a cutter bar, wherein the shaft sleeve is rotatably arranged on the supporting seat, and one end of the rotating arm and one end of the cutter bar are oppositely arranged on the shaft sleeve;

The pneumatic assembly is rotatably arranged on the supporting seat, and the telescopic end of the pneumatic assembly is movably connected with the other end of the rotating arm through a first connecting block and is used for driving the shaft sleeve to drive the cutter bar to rotate so that the free end of the cutter bar drives a moving contact in the contact system to contact or separate from a fixed contact in the contact system;

And the control device is electrically connected with the pneumatic assembly and used for controlling the starting or stopping of the pneumatic assembly.

Optionally, the insulation component comprises a composite insulator, an upper mounting plate and a lower mounting plate;

The upper mounting plate and the lower mounting plate are respectively arranged at the top end and the bottom end of the composite insulator, the lower surface of the supporting seat is arranged on the upper surface of the upper mounting plate, and the lower mounting plate is arranged in the composite test voltage loop.

Optionally, a first connecting shaft is arranged on the supporting seat, and the shaft sleeve is sleeved on the first connecting shaft and is rotationally connected with the first connecting shaft.

Optionally, the switch body further comprises a pneumatic clamping device;

The clamping head of the pneumatic clamping device is in an inverted U shape and is electrically connected with the control device and used for controlling the clamping head to clamp or unclamp the cutter bar through the control device.

Optionally, a second connecting shaft is further arranged on the supporting seat;

The pneumatic assembly comprises a cylinder and a second connecting block;

one end of the second connecting block is movably connected with the second connecting shaft, the other end of the second connecting block is connected with the cylinder body of the air cylinder, and the air cylinder is electrically connected with the control device.

Optionally, the air inlet pressure of the air cylinder is 0.6-0.8 MPa.

Optionally, the supporting seat, the shaft sleeve, the rotating arm, the cutter bar and the first connecting block are all made of Q235 material.

According to the pneumatic isolating change-over switch with the self-locking function, the rotating arm is driven by the pneumatic component to drive the shaft sleeve to rotate, so that the cutter bar arranged on the shaft sleeve rotates, the free end of the cutter bar drives the moving contact in the contact system to contact or separate from the fixed contact in the contact system in the rotating process, the switching-on or switching-off of the pneumatic isolating change-over switch is realized, and the starting or stopping of the pneumatic component in the process is realized through the control device electrically connected with the pneumatic component, so that the pneumatic isolating change-over switch has the self-locking function, the remote operation and the operation of the pneumatic isolating change-over switch are more accurate, the situation that the mechanical structure is worn due to frequent switching-on and switching-off of the pneumatic isolating change-over switch is avoided, the service life of the isolating change-over switch is prolonged, the pneumatic isolating change-over switch can adapt to the requirements of an intelligent power grid, the manpower is saved, and the operation efficiency and the safety of the pneumatic isolating change-over switch are improved. In addition, the switch body, the pneumatic component and the like are arranged on the supporting seat, and the supporting seat is arranged in the synthetic test voltage loop through the insulating component, so that the insulating property of the pneumatic isolating change-over switch is improved, the safety of the pneumatic isolating change-over switch is improved, and the pneumatic isolating change-over switch can be applied to high-humidity or polluted environments.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a pneumatic isolating switch with self-locking function according to an embodiment of the present application;

Fig. 2 is a cross-sectional view of a pneumatic isolating transfer switch with a self-locking function in a closing state according to an embodiment of the present application;

fig. 3 is a top view of a pneumatic isolating switch with a self-locking function in a closing state according to an embodiment of the present application;

FIG. 4 is a side view of a pneumatic isolating switch with self-locking function according to an embodiment of the present application in an open state;

FIG. 5 is a schematic diagram of an embodiment of the present application in which both the pneumatic cylinder and the pneumatic clamping device are electrically connected to a control device.

100 Parts of a supporting seat, 101 parts of a first connecting shaft, 102 parts of a second connecting shaft, 200 parts of an insulating assembly, 201 parts of a composite insulator, 202 parts of an upper mounting plate, 203 parts of a lower mounting plate, 300 parts of a switch body, 301 parts of a shaft sleeve, 302 parts of a rotating arm, 303 parts of a cutter bar, 304 parts of a pneumatic clamping device, 400 parts of a pneumatic assembly, 401 parts of a cylinder, 402 parts of a second connecting block, 500 parts of a first connecting block and 600 parts of a control device.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are also within the scope of the application.

Referring to fig. 1 to 5, the present application provides a pneumatic isolating transfer switch with self-locking function, comprising:

The support seat 100 is arranged in the composite test voltage loop through the insulation assembly 200, wherein the insulation assembly 200 not only can enhance the insulation performance of the whole pneumatic isolating change-over switch, but also saves the ground occupation of the whole pneumatic isolating change-over switch.

The switch body 300 comprises a shaft sleeve 301, a rotating arm 302 and a cutter rod 303, wherein the shaft sleeve 301 is rotatably arranged on the supporting seat 100, one end of the rotating arm 302 and one end of the cutter rod 303 are arranged on the shaft sleeve 301 in a corresponding mode (wherein one end of the rotating arm 302 and one end of the cutter rod 303 are fixedly connected with the shaft sleeve 301), and particularly, when the rotating arm 302 rotates clockwise, the rotating arm 302 drives the shaft sleeve 301 to rotate clockwise synchronously with the rotating arm 302, and the cutter rod 303 rotates clockwise along with the shaft sleeve 301 (see the state diagrams of fig. 3-4). In contrast, when the rotation arm 302 rotates counterclockwise, the rotation arm 302 drives the shaft sleeve 301 to rotate counterclockwise in synchronization therewith, and the cutter bar 303 rotates counterclockwise following the shaft sleeve 301 (see the state diagrams of fig. 4 to 3).

The pneumatic assembly 400 is rotatably arranged on the supporting seat 100, and the telescopic end of the pneumatic assembly 400 is movably connected with the other end of the rotating arm 302 through the first connecting block 500, and is used for driving the shaft sleeve 301 to drive the cutter rod 303 to rotate so that the free end of the cutter rod 303 drives a moving contact in the contact system to contact with or separate from a fixed contact in the contact system, wherein the contact system is an actuating mechanism of an electric appliance and is used for realizing connection and disconnection of a circuit. The movable contact is generally composed of a movable contact and a fixed contact, and can be divided into a bridge contact and a finger contact according to structural forms. The contact system also comprises contact springs, wherein the contact springs are used for providing a pressure between the contacts to ensure good contact performance, arc extinguishing means, wherein the arc extinguishing means are used for extinguishing an arc generated when the contacts are broken, for example, in a high voltage circuit breaker, an arc extinguishing chamber elongates and cools the arc by magnetic blow-out and electrodynamic driving to free the arc, and other resulting components, which also need to take into account electrodynamic stability and thermal stability, see in particular the prior art, and since the contact system is not an innovation point of the present application. Accordingly, the structure of the contact system is not specifically described herein.

And the control device 600, the control device 600 is electrically connected with the pneumatic assembly 400 and is used for controlling the starting or stopping of the pneumatic assembly 400. The control device 600 includes a PLC controller, and is electrically connected to the pneumatic assembly 400 through the PLC controller.

According to the pneumatic isolating change-over switch with the self-locking function, the rotating arm 302 is driven by the pneumatic assembly 400 to pull the shaft sleeve 301 to rotate, so that the cutter bar 303 arranged on the shaft sleeve 301 rotates, the free end of the cutter bar 303 drives the moving contact in the contact system to contact or separate from the fixed contact in the contact system in the rotating process, the switching-on or switching-off of the pneumatic isolating change-over switch is realized, and the starting or stopping of the pneumatic assembly 400 in the process is realized through the control device 600 electrically connected with the pneumatic assembly, so that the pneumatic isolating change-over switch has the self-locking function, the remote operation and the operation of the pneumatic isolating change-over switch are more accurate, the situation that the mechanical structure is worn due to frequent switching-on and switching-off of the pneumatic isolating change-over switch is avoided, the service life of the pneumatic isolating change-over switch is prolonged, the pneumatic isolating change-over switch can adapt to the requirements of an intelligent power grid, and the manpower is saved, and the operation efficiency and the safety of the pneumatic isolating change-over switch are improved. In addition, the switch body 300, the pneumatic component 400 and the like are arranged on the supporting seat 100, and the supporting seat 100 is arranged in the synthetic test voltage loop through the insulating component 200, so that the insulating performance of the pneumatic isolating change-over switch is improved, the safety of the pneumatic isolating change-over switch is improved, and the pneumatic isolating change-over switch can be applied to high-humidity or polluted environments.

In some embodiments, referring to fig. 1, the insulation assembly 200 of the present application comprises a composite insulator 201, an upper mounting plate 202 and a lower mounting plate 203, and in particular, the upper mounting plate 202 and the lower mounting plate 203 are respectively disposed at the top and bottom ends of the composite insulator 201, the lower surface of the support base 100 is disposed on the upper surface of the upper mounting plate 202, and the lower mounting plate 203 is mounted in the composite test voltage loop. The composite insulator 201 is a special insulation control, and can play an important role in an overhead transmission line. The composite insulator 201 can be divided into a line composite insulator, a power station and an electric appliance composite insulator, and also can be divided into a rod-shaped suspension composite insulator, a needle-shaped composite insulator, a cross arm composite insulator, a support column composite insulator, a windage yaw prevention composite insulator and the like. The type of the composite insulator 201 used in the present application can be set according to actual needs, and thus the present application is not limited thereto.

In the above embodiment, the arrangement of the composite insulator 201 makes the insulation performance of the pneumatic isolating switch better, so that the safety of the pneumatic isolating switch is improved and the pneumatic isolating switch can be applied to high humidity or polluted environments.

In some embodiments, referring to fig. 1 to 4, a first connecting shaft 101 is disposed on a supporting seat 100 in the present application, and a shaft sleeve 301 is sleeved on the first connecting shaft 101 and is rotatably connected with the first connecting shaft 101. The first connecting shaft 101 is fixedly connected with the supporting seat 100.

In the above embodiment, the sleeve 301 rotates around the first connecting shaft 101 during the whole rotation process (clockwise or counterclockwise rotation), and the sleeve 301 may be rotatably connected to the first connecting shaft 101 through a bearing.

In some embodiments, referring to fig. 5, the switch body 300 of the present application further comprises a pneumatic clamping device 304, specifically, a clamping head of the pneumatic clamping device 304 has an inverted U shape, and is electrically connected to the control device 600 for controlling the clamping or unclamping of the knife bar by the control device 600. The housing of the pneumatic clamping device 304 may be fixed on a support frame in the synthetic test voltage circuit, and the specific location and connection manner depend on the specific structure and application scenario, but the present application is not limited thereto specifically.

In the above embodiment, the pneumatic clamping device 304 may be a MHZL2 series pneumatic finger cylinder, an MHC2 finger cylinder, or the like, which may be specifically selected according to practical situations, but the present application is not limited thereto. In addition, the working principle of the pneumatic clamping device 304 can be referred to the working principle of the existing MHZL-series pneumatic finger cylinder, MHC2 finger cylinder and the like, and the application is not specifically described herein. According to the application, the cutter bar 303 is clamped by the pneumatic clamping device 304 in the closing process, so that the stability of the pneumatic isolating change-over switch in the closing process is improved. Specifically, after the free end of the cutter bar 303 drives the moving contact in the moving contact system to contact with the fixed contact in the contact system, that is, after the pneumatic isolating change-over switch is switched on, the clamping head of the pneumatic clamping device 304 is controlled to open by the control device 600 and clamp the cutter bar 303, so that the purpose of clamping and fixing the cutter bar 303 by the clamping head of the pneumatic clamping device 304 is achieved.

In some embodiments, referring to fig. 1 to 4, a second connection shaft 102 is further disposed on the support base 100 in the present application, where the second connection shaft 102 is fixedly connected to the support base 100.

In addition, the pneumatic assembly 400 includes a cylinder 401 and a second connection block 402, and specifically, one end of the second connection block 402 is movably connected with the second connection shaft 102, and the other end thereof is connected with a cylinder body of the cylinder 401, and the cylinder 401 is electrically connected with the control device 600. The specification and model of the cylinder 401 may be selected according to practical situations, and the present application is not limited thereto.

In the above embodiment, in the process of stretching the stretching end of the air cylinder 401, the stretching end of the air cylinder 401 drives the first connecting block 500 fixedly connected with the air cylinder 401 to stretch, and because the first connecting block 500 is movably connected with the rotating arm 302, the rotating arm 302 rotates clockwise along with the stretching of the stretching end of the air cylinder 401 and gradually presents the state of fig. 4, and at this time, the free end of the cutter bar 303 also rotates clockwise along with the shaft sleeve 301 and drives the moving contact in the contact system to separate from the fixed contact in the contact system, so as to realize the opening of the pneumatic isolating transfer switch. It should be noted that, the supporting seat 100 is provided with a notch below the first connecting shaft 101, so that the clockwise rotation of the cutter bar 303 is not blocked. In contrast, in the process of shrinking the telescopic end of the air cylinder 401, the air cylinder 401 pulls the rotating arm 302 back towards the direction of the second connecting block 402, the rotating arm 302 rotates anticlockwise, the shaft sleeve 301 rotates anticlockwise along with the rotating arm 302, and then the cutter bar 303 is driven to rotate anticlockwise until the free end of the cutter bar 303 drives the moving contact in the contact system to contact with the fixed contact in the contact system, so that the switching on of the pneumatic isolation change-over switch is realized.

In some embodiments, the intake pressure of the cylinder 401 in the present application is 0.6-0.8 mpa.

In the above embodiment, the lower intake pressure of the cylinder 401 may result in a smaller output force of the cylinder 401, resulting in poorer stability of the cylinder 401 during operation. While an excessive intake pressure of the cylinder 401 may increase consumption of compressed air, and may cause increased wear of internal parts of the cylinder 401. That is, the intake pressure of the cylinder 401 needs to be within a proper range, and the intake pressure of the cylinder 401 is 0.6-0.8 mpa, so that stable operation of the cylinder 401 can be ensured, the operation efficiency of the cylinder 401 can be improved, and energy consumption and abrasion are reduced.

In some embodiments, the support 100, the shaft sleeve 301, the rotating arm 302, the tool bar 303 and the first connecting block 500 are all made of Q235.

In the embodiment, as Q235 is common carbon structural steel, the steel has good plasticity, toughness and welding performance, and moderate strength, and can meet the requirements of most engineering structures. Therefore, the application adopts the structural components such as the supporting seat 100, the shaft sleeve 301, the rotating arm 302, the cutter bar 303, the first connecting block 500 and the like which are made of Q235 materials, so that the processing cost of the whole pneumatic isolating change-over switch is lower and the mechanical property is good.

It should be noted that the above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same, and although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not deviate the essence of the corresponding technical solution from the scope of the technical solution of the embodiments of the present application.

Claims (7)

1. A pneumatic isolating transfer switch with self-locking function, comprising:

The support base (100), the said support base (100) is installed in the synthetic test voltage circuit through the insulating assembly (200);

the switch comprises a switch body (300), wherein the switch body (300) comprises a shaft sleeve (301), a rotating arm (302) and a cutter bar (303), the shaft sleeve (301) is rotatably arranged on the supporting seat (100), and one end of the rotating arm (302) and one end of the cutter bar (303) are oppositely arranged on the shaft sleeve (301);

The pneumatic assembly (400) is rotatably arranged on the supporting seat (100), and the telescopic end of the pneumatic assembly (400) is movably connected with the other end of the rotating arm (302) through a first connecting block (500) and is used for driving the shaft sleeve (301) to drive the cutter bar (303) to rotate so that the free end of the cutter bar (303) drives a moving contact in the contact system to contact with or separate from a fixed contact in the contact system;

And the control device (600) is electrically connected with the pneumatic assembly (400) and is used for controlling the starting or stopping of the pneumatic assembly (400).

2. The pneumatic isolating transfer switch with self-locking function according to claim 1, wherein the insulating assembly (200) comprises a composite insulator (201), an upper mounting plate (202) and a lower mounting plate (203);

The upper mounting plate (202) and the lower mounting plate (203) are respectively arranged at the top end and the bottom end of the composite insulator (201), the lower surface of the supporting seat (100) is arranged on the upper surface of the upper mounting plate (202), and the lower mounting plate (203) is arranged in the composite test voltage loop.

3. The pneumatic isolating change-over switch with the self-locking function according to claim 1, wherein a first connecting shaft (101) is arranged on the supporting seat (100), and the shaft sleeve (301) is sleeved on the first connecting shaft (101) and is rotationally connected with the first connecting shaft (101).

4. The pneumatic isolating transfer switch with self-locking function according to claim 1, characterized in that said switch body (300) further comprises pneumatic clamping means (304);

The clamping head of the pneumatic clamping device (304) is in an inverted U shape and is electrically connected with the control device (600) for controlling the clamping or loosening of the cutter bar (303) through the control device (600).

5. The pneumatic isolating transfer switch with the self-locking function according to claim 1, wherein a second connecting shaft (102) is further arranged on the supporting seat (100);

the pneumatic assembly (400) comprises a cylinder (401) and a second connection block (402);

One end of the second connecting block (402) is movably connected with the second connecting shaft (102), the other end of the second connecting block is connected with the cylinder body of the cylinder (401), and the cylinder is electrically connected with the control device (600).

6. The pneumatic isolating transfer switch with the self-locking function according to claim 5, wherein the air inlet pressure of the air cylinder (401) is 0.6-0.8 MPa.

7. The pneumatic isolating switch with self-locking function according to any one of claims 1 to 5, wherein the supporting seat (100), the shaft sleeve (301), the rotating arm (302), the knife bar (303) and the first connecting block (500) are all made of Q235 material.