Rotary conversion device for outdoor direct-current isolating switch

Abstract

The utility model discloses a rotary conversion device for an outdoor direct current isolating switch, which comprises a control box, a connecting rod, a rotary mechanism, an operating mechanism and a static contact device which are mutually combined to play a role, and the whole operating mechanism can be automatically controlled to be switched off and switched on. According to the utility model, the power control system can be manually switched on or switched off when the power control system breaks down, the whole power control system is relatively independent, each part is separated, one-by-one troubleshooting during maintenance is facilitated, the number of parts used in the whole power control system is small, the combination mode is simple, stability and accuracy are achieved, and operation risks caused by operation are also avoided through automatic control.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary equipment of a DC isolating switch, in particular to a rotary conversion device for an outdoor DC isolating switch. Background Art

[0002] Isolating switches are important switchgear in the electrical system of power plants and substations, and must be used in conjunction with high-voltage circuit breakers. Isolating switches are suitable for indoor installations with three-phase AC 50Hz and rated voltage 12KV. They are used to connect, disconnect or convert lines when high-voltage equipment is under voltage but under load.

[0003] The conductive part is composed of a copper plate bent at a right angle to form a static contact. The end with a hole can be connected to the busbar by screws; the other end is shorter and contacts the moving blade (moving contact) when the switch is closed. The two copper plates form a contact strip, also known as a moving contact, which can rotate around the axis at a certain angle and clamp the static contact when the switch is closed. There is a clamping spring between the two copper plates to adjust the contact pressure between the moving and static contacts. At the same time, when the current in the same direction flows through the two copper plates, they generate an electromotive force that attracts each other.

[0004] For example, the Chinese patent with the publication number CN117594377A discloses an indoor double-column vertical open DC isolating switch and its use method, which relates to the technical field of isolating switches and is used to solve the problem that the isolating switch occupies a large space, resulting in a small insulation distance and a small operating space in the switch cabinet. It includes a base, a support insulator, a terminal block, a knife switch, a deflection link mechanism, a rotating shaft, an insulating pull rod and a gate position detection component. The rotating shaft is rotatably mounted on the base. The deflection link mechanism includes a connecting plate, one end of which is fixedly connected to the outer wall of the rotating shaft, the other end of which is hinged to the lower end of the insulating pull rod, and the upper end of the insulating pull rod is hinged to the other end of the knife switch; the gate position detection component includes a multi-contact travel switch and a protrusion. The multi-contact travel switch is arranged on the base and is separated on the left and right sides of the rotating shaft. The protrusion is fixed on the outer wall of the rotating shaft. When the protrusion contacts and squeezes the roller of the multi-contact travel switch on the corresponding side, the multi-contact travel switch is triggered. The present invention has a compact structure and occupies a small space when installed in the switch cabinet.

[0005] In summary, there are many drawbacks in the existing auxiliary equipment of DC disconnectors. The current opening and closing mechanisms of pole-mounted disconnectors lack stability and precision, and there are operational risks. As mentioned in the above literature, the disconnectors have a compact structure and are all concentrated in one part, which makes maintenance very difficult. In addition, it is impossible to adjust and switch between manual and electric operation, and it is impossible to achieve closing and opening operations that require a certain operating height. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides an outdoor DC isolating switch rotation conversion device to solve the above problems.

[0007] In order to achieve the above objectives, the utility model is implemented through the following technical solutions.

[0008] An outdoor DC disconnect switch rotation conversion device comprises a control box, a connecting rod, a rotating mechanism, an operating mechanism, and a static contact device. One side of the connecting rod is connected to the control box, one side of the rotating mechanism is connected to the other side of the connecting rod, and the other side is connected to the operating mechanism. The operating mechanism is connected to the static contact device.

[0009] The control box includes a box body, a driving device, and a first conversion box. The driving device is fixed in the box body, and the driving end of the driving device is connected to the first conversion box.

[0010] The operating mechanism includes a transmission shaft, a tension insulator string body, and a moving contact device. One side of the transmission shaft is rotatably connected to the tension insulator string body. One end of the moving contact device is movably connected to the static contact device, and the other end is connected to the tension insulator string body. The control box, connecting rod, rotating mechanism, operating mechanism, and static contact device are used in combination with each other to play a role. The overall operating mechanism can open and close the switch through automatic control, and can also be opened and closed manually when a power control system fails. The whole is relatively independent, and each part is separated, which is convenient for one-by-one inspection during maintenance. The whole uses a small number of parts and a simple combination method. At the same time, it has stability and precision. Automatic control also avoids operational risks brought by operations.

[0011] Preferably, one side of the connecting rod is connected to the first conversion box of the control box.

[0012] Preferably, the other rotatable side of the transmission shaft is connected to a rotating mechanism.

[0013] Preferably, a bearing is provided at the connection between the transmission shaft and the static contact device.

[0014] Preferably, the first conversion box is a bevel gear transmission box.

[0015] Preferably, the rotating mechanism is a bevel gear transmission box.

[0016] Preferably, the rotating mechanism is provided with a connecting shaft extending therefrom and connected to a bevel gear on one side of the internal corresponding transmission shaft.

[0017] Preferably, a keyway is provided at the top end of the connecting shaft.

[0018] Preferably, the connecting rod is made of Q235B carbon steel.

[0019] Preferably, the driving device is a motor.

[0020] Compared with the prior art, the utility model discloses an outdoor DC isolating switch rotation conversion device, including a control box, a connecting rod, a rotating mechanism, an operating mechanism, and a static contact device. The five are used in combination with each other to play a role. The overall operating mechanism can open and close the switch through automatic control, and can also be opened and closed manually when a power control system fails. The whole is relatively independent, and each part is separated, which is convenient for one-by-one inspection during maintenance. The whole uses a small number of parts and a simple combination method. It has stability and precision, and automatic control also avoids operational risks brought by operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of the rotary conversion device of an outdoor DC isolating switch of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the control box of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the rotating mechanism of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the operating mechanism of the utility model;

[0025] Figure 5 It is a structural schematic diagram of the operating mechanism of the utility model. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] A rotary conversion device for an outdoor DC disconnect switch comprises a control box 1, a connecting rod 2, a rotating mechanism 3, an operating mechanism 4, and a static contact device 5. One side of the connecting rod 2 is connected to the control box 1, one side of the rotating mechanism 3 is connected to the other side of the connecting rod 2, and the other side is connected to the operating mechanism 4. The operating mechanism 4 is connected to the static contact device 5.

[0028] The control box 1 comprises a box body 11, a driving device 12, and a first conversion box 13. The driving device 12 is fixed in the box body 11, and the driving end of the driving device 12 is connected to the first conversion box 13.

[0029] The operating mechanism 4 includes a transmission shaft 41, a tension insulator string body 42, and a moving contact device 43. One side of the transmission shaft 41 is connected to the tension insulator string body 42. One end of the moving contact device 43 is movably connected to the static contact device 5, and the other end is connected to the tension insulator string body 42. One side of the connecting rod 2 is connected to the first conversion box 13 of the control box 1, and the other side of the transmission shaft 41 is connected to the rotating mechanism 3. A bearing is provided at the connection between the transmission shaft 41 and the static contact device 5. The first conversion box 13 is a bevel gear transmission box, and the rotating mechanism 3 is a bevel gear transmission box. The rotating mechanism 3 is extended with a connecting shaft 31, and is connected to the bevel gear corresponding to one side of the transmission shaft 41. The top of the connecting shaft 31 is provided with a keyway. The connecting rod 2 is made of Q235B carbon steel, and the driving device 12 is a motor.

[0030] There are two working modes. The first is automatic control, which drives the bevel gear in the first conversion box 13 through the rotation of the driving device 12, and transmits power to the connecting rod 2. The connecting rod 2 rotates to drive the bevel gear in the rotating mechanism 3, and transmits power to the transmission shaft 41. The transmission shaft 41 swings and drives the main body 42 of the tension insulator string to move. The main body 42 of the tension insulator string can realize the opening and closing actions of the moving contact device 43 and the static contact device 5, and only the driving device 12 needs to be rotated forward and reversed.

[0031] The second method is manual operation. When a fault occurs in the power control system, the tool can be aligned with the keyway at the top of the connecting shaft 31 and inserted into the keyway, and then rotated to realize the opening and closing actions of the moving contact device 43 and the static contact device 5.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0034] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An outdoor DC isolating switch rotary conversion device, characterized in that: The invention comprises a control box (1), a connecting rod (2), a rotating mechanism (3), an operating mechanism (4), and a stationary contact device (5), wherein one side of the connecting rod (2) is connected to the control box (1), one side of the rotating mechanism (3) is connected to the other side of the connecting rod (2), and the other side is connected to the operating mechanism (4), and the operating mechanism (4) is connected to the stationary contact device (5). The control box (1) comprises a box body (11), a driving device (12), and a first conversion box (13); the driving device (12) is fixed in the box body (11), and a driving end of the driving device (12) is connected to the first conversion box (13). The operating mechanism (4) comprises a transmission shaft (41), a tension insulator string body (42), and a moving contact device (43); one side of the transmission shaft (41) is rotatably connected to the tension insulator string body (42); one end of the moving contact device (43) is movably connected to the stationary contact device (5), and the other end is connected to the tension insulator string body (42).

2. The outdoor DC isolating switch rotary conversion device according to claim 1 is characterized in that: One side of the connecting rod (2) is connected to the first conversion box (13) of the control box (1).

3. The outdoor DC isolating switch rotary conversion device according to claim 1 is characterized in that: The other rotatable side of the transmission shaft (41) is connected to the rotating mechanism (3).

4. The outdoor DC isolating switch rotary conversion device according to claim 1 is characterized in that: A bearing is provided at the connection between the transmission shaft (41) and the static contact device (5).

5. The outdoor DC isolating switch rotary conversion device according to claim 1 is characterized in that: The first conversion box (13) is a bevel gear transmission box.

6. The outdoor DC isolating switch rotary conversion device according to claim 1 is characterized in that: The rotating mechanism (3) is a bevel gear transmission box.

7. The outdoor DC isolating switch rotary conversion device according to claim 6 is characterized in that: The rotating mechanism (3) is provided with a connecting shaft (31) extending therefrom and connected to a bevel gear on one side of the corresponding transmission shaft (41) inside.

8. The outdoor DC isolating switch rotary conversion device according to claim 7 is characterized in that: The top end of the connecting shaft (31) is provided with a keyway.

9. The outdoor DC isolating switch rotary conversion device according to claim 1, characterized in that: The connecting rod (2) is made of Q235B carbon steel.

10. The outdoor DC isolating switch rotary conversion device according to claim 1, characterized in that: The driving device (12) is a motor.

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