Indoor high-voltage isolating switch and box-type substation

Abstract

The utility model relates to an indoor high-voltage isolating switch and a box-type substation. The indoor high-voltage isolating switch comprises a base, a pair of fixed insulating columns are arranged on the base, wiring boards are respectively mounted on the upper sides of the fixed insulating columns, a first contact is arranged on the first wiring board, and a second contact and a rotatable conductive arm are mounted on the second wiring board; self-locking assemblies are arranged on the front side and the rear side of the first wiring board, each self-locking assembly comprises a shell, a transverse sliding block, a longitudinal sliding block and a pressing plate, and when the conductive arms are pressed on the transverse arms, the pressing plates abut against the conductive arms. A combined switch composed of a grounding switch, a circuit breaker and the indoor high-voltage isolation switch is arranged in the box-type substation. According to the utility model, the self-locking assembly is arranged and abuts against the conductive arm after closing is completed, so that the contact between the conductive arm and the contact is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of disconnecting switch, concretely relates to an indoor high-voltage disconnecting switch and box-type substation. BACKGROUND

[0002] The indoor high-voltage disconnecting switch is commonly used in the power system, and is used for circuit separation and combination under no-load current, and plays the roles of isolating power supply and switching operation. The box-type substation is an integrated power conversion device, and is widely applied to urban power grid reconstruction, industrial parks, residential areas and the like. The box-type substation usually has a combined switch composed of a disconnecting switch, a circuit breaker and a grounding switch.

[0003] Since the disconnecting switch is installed in the substation, the environment is relatively stable, and the disconnecting switch usually has a simple structure. The reliable contact between the conducting arm and the contact is ensured by installing a spring and a screw on the conducting arm. In order to maintain and repair, the disconnecting switch needs to be frequently opened and closed. The spring can maintain the contact between the conducting arm and the contact after closing. However, since the spring itself exerts pressure on the conducting arm in the open state, it is not conducive to the closing action, and the collision between the conducting arm and the contact is prone to occur. SUMMARY

[0004] The utility model discloses an indoor high-voltage disconnecting switch and box-type substation to solve the above problems, and the specific technical scheme is as follows:

[0005] An indoor high-voltage disconnecting switch comprises a base, a pair of fixed insulating columns are arranged on the base, a first wiring board and a second wiring board are respectively arranged on the upper sides of the two fixed insulating columns, a first contact is arranged on the first wiring board, a second contact and a rotatable conducting arm are arranged on the second wiring board, self-locking assemblies are arranged on the front and back sides of the first wiring board, the self-locking assembly comprises a shell, a horizontal sliding block, a vertical sliding block, a pressing plate, the shell comprises a horizontal arm and a vertical arm, the vertical sliding block is inserted into the horizontal arm, the horizontal sliding block is arranged on the lower side of the vertical sliding block, the contact surfaces of the horizontal sliding block and the vertical sliding block are inclined surfaces, a first elastic expansion rod is arranged between the horizontal sliding block and the shell, the pressing plate is arranged on the side of the vertical arm facing the first contact, a supporting plate is further arranged in the vertical arm, the supporting plate and the pressing plate are connected through a second elastic expansion rod, and the supporting plate is connected with the horizontal sliding block.

[0006] Further, the upper surface of the second wiring board is provided with a mounting seat, and the conducting arm is rotatably arranged on the mounting seat.

[0007] Further, a driving shaft is arranged on the base, the driving shaft and the conducting arm are connected through a transmission assembly, the transmission assembly comprises a movable insulating column and a connecting rod, the upper end of the movable insulating column is connected with the conducting arm, the lower end of the movable insulating column is rotatably connected with one end of the connecting rod, and the other end of the connecting rod is fixedly connected with the driving shaft.

[0008] Furthermore, the conductive arm includes two parallel conductive sheets, which are pressed against the corresponding pressure plate when they fall onto their respective horizontal arms.

[0009] Furthermore, a guide block is provided on the upper side of the first contact, and a guide slope is provided on the upper side of the guide block.

[0010] A prefabricated substation, wherein the prefabricated box is equipped with a combination switch consisting of a disconnecting switch, a circuit breaker and a grounding switch, wherein the disconnecting switch is the aforementioned indoor high-voltage disconnecting switch.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. By setting a self-locking component, the conductive arm is pressed against after the circuit is closed, ensuring contact between the conductive arm and the contact. In the open state, the conductive arm is not subjected to elastic compression, making it easier to close the circuit.

[0013] 2. By setting guide blocks, the conductive arm is guided before it comes into contact with the contact, avoiding direct collision between the two. This helps maintain the integrity of the coating on the contact surface and extends the equipment life. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a diagram showing the closing state of the indoor high-voltage disconnector described in this utility model;

[0016] Figure 2 This is a diagram showing the tripping state of the indoor high-voltage disconnector described in this utility model;

[0017] Figure 3 This is a partial sectional view of the indoor high-voltage disconnect switch described in this utility model;

[0018] Figure 4 This is a perspective view of the self-locking component described in this utility model;

[0019] Figure 5 This is a cross-sectional view of the self-locking component described in this utility model.

[0020] In the diagram: 1. Base; 2. Fixed insulating column; 3. Drive shaft; 4. Transmission assembly; 4.1. Movable insulating column; 4.2. Connecting rod; 5. Conductive arm; 5.1. Conductive sheet; 6. Guide block; 7. Self-locking assembly; 7.1. Housing; 7.2. Support plate; 7.3. Horizontal slider; 7.4. First elastic telescopic rod; 7.5. Vertical slider; 7.6. Second elastic telescopic rod; 7.7. Pressure plate; 8. First terminal block; 8.1. First contact; 9. Second terminal block; 9.1. Second contact; 9.2. Mounting base. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] The present invention provides the following specific embodiments:

[0023] Firstly, such as Figures 1-5As shown, this utility model provides an indoor high-voltage disconnect switch, including a base 1. A pair of symmetrically arranged fixed insulating posts 2 are provided on the base 1. A first terminal block 8 and a second terminal block 9 are respectively installed on the upper side of the two fixed insulating posts 2. The first terminal block 8 is provided with a first contact 8.1, and the second terminal block 9 is provided with a second contact 9.1 and a conductive arm 5. The conductive arm 5 is rotatably mounted on the second terminal block 9. Self-locking components 7 are provided on both the front and rear sides of the first terminal block 8. The self-locking components 7 include a housing 7.1, a horizontal slider 7.3, a vertical slider 7.5, and a pressure plate 7.7. The housing 7.1 includes a horizontal arm and a vertical arm. The horizontal arm supports the conductive arm 5 when the switch is closed. The vertical slider 7.5 is inserted into the upper side of the horizontal arm. Block 7.3 is arranged on the lower side of the longitudinal slider 7.5. The contact surface between the transverse slider 7.3 and the longitudinal slider 7.5 is an inclined surface. A first elastic telescopic rod 7.4 is provided between the transverse slider 7.3 and the outer shell 7.1. The pressure plate 7.7 is arranged on the side of the longitudinal arm facing the first contact 8.1. A support plate 7.2 is also arranged inside the longitudinal arm. The support plate 7.2 and the pressure plate 7.7 are connected by a second elastic telescopic rod 7.6. The support plate 7.2 is fixedly connected to the transverse slider 7.3. When the conductive arm 5 presses on the transverse arm, the longitudinal slider 7.5 slides down and squeezes the transverse slider 7.3. The transverse slider 7.3 and the support plate 7.2 move towards the first contact 8.1. Under the action of the second elastic telescopic rod 7.6, the pressure plate 7.7 abuts against the conductive arm 5.

[0024] Furthermore, the self-locking assembly 7 is arranged on the front and rear sides of the first contact 8.1, and the upper surface of the second terminal block 9 is provided with a mounting base 9.2, on which the conductive arm 5 is rotatably mounted.

[0025] Furthermore, a drive shaft 3 is provided on the base 1, and the drive shaft 3 and the conductive arm 5 are connected by a transmission assembly 4. The transmission assembly 4 includes a movable insulating column 4.1 and a connecting rod 4.2. The upper end of the movable insulating column 4.1 is connected to the conductive arm 5, and the lower end of the movable insulating column 4.1 is rotatably connected to one end of the connecting rod 4.2. The other end of the connecting rod 4.2 is fixedly connected to the drive shaft 3. The drive shaft 3 is connected to an operating assembly, which can be electric or manual. The operating assembly drives the drive shaft 3 to rotate, thereby driving the conductive arm 5 to move.

[0026] Furthermore, the conductive arm 5 includes two parallel conductive plates 5.1, which are fixedly connected at their midpoints by a rotating shaft. The movable insulating post 4.1 is rotatably mounted on the rotating shaft, and when the conductive plate 5.1 falls onto its corresponding horizontal arm, it is abutted by its corresponding pressure plate 7.7. In the closed state, the conductive arm 5 connects the first contact 8.1 and the second contact 9.1, thus forming a path between the first terminal block 8 and the second terminal block 9.

[0027] Furthermore, a guide block 6 is provided on the upper side of the first contact 8.1, and a guide slope is provided on the upper side of the guide block 6. When the circuit is closed, the conductive arm 5 first contacts the guide block 6, and then contacts the first contact 8.1, thus avoiding collision between the conductive arm 5 and the first contact 8.1.

[0028] When the circuit is closed, the conductive arm 5 falls into the gap between the self-locking assembly 7 and the first contact 8.1. Specifically, the conductive piece 5.1 falls onto the horizontal arm of the corresponding side of the outer casing 7.1, the vertical slider 7.5 is pressed down, and the horizontal slider 7.3 drives the support plate 7.2 to move towards the first contact 8.1. Under the action of the second elastic telescopic rod 7.6, the pressure plate 7.7 abuts against the conductive piece 5.1. When the circuit is opened, the conductive arm 5 is raised. Under the action of the first elastic telescopic rod 7.4, the horizontal slider 7.3 resets, causing the support plate 7.2 to move away from the first contact 8.1. During the process of raising the conductive arm 5, the pressure of the pressure plate 7.7 on the conductive arm 5 gradually decreases until the pressure plate 7.7 disengages from the conductive arm 5. In the open state, the conductive arm 5 is not elastically compressed, making it easier to close the circuit.

[0029] By setting the guide block 6, the conductive arm 5 is guided before it comes into contact with the contact, thus avoiding direct collision between the two. This helps maintain the integrity of the coating on the contact surface and extends the equipment life.

[0030] Secondly, this utility model provides a box-type substation, which is equipped with a combination switch consisting of a grounding switch, a circuit breaker and the aforementioned indoor high-voltage disconnect switch. The operating components of the grounding switch, circuit breaker and indoor high-voltage disconnect switch are interlocked to ensure the safety and accuracy of the circuit breaker, grounding switch and indoor high-voltage disconnect switch during operation and to prevent electrical accidents caused by misoperation.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An indoor high voltage disconnector, characterized in that: The base is provided with a pair of fixed insulating posts, the upper sides of the two fixed insulating posts are respectively provided with a first terminal block and a second terminal block, the first terminal block is provided with a first contact, the second terminal block is provided with a second contact and a rotatable conductive arm, the front and rear sides of the first terminal block are respectively provided with a self-locking assembly, the self-locking assembly comprises a shell, a horizontal sliding block, a vertical sliding block and a pressing plate, the shell comprises a horizontal arm and a vertical arm, the vertical sliding block is inserted into the horizontal arm, the horizontal sliding block is arranged on the lower side of the vertical sliding block, the contact surfaces of the horizontal sliding block and the vertical sliding block are inclined surfaces, the horizontal sliding block and the shell are provided with a first elastic telescopic rod, the pressing plate is arranged on the side of the vertical arm facing the first contact, the vertical arm is further provided with a supporting plate, the supporting plate and the pressing plate are connected through a second elastic telescopic rod, and the supporting plate is connected with the horizontal sliding block; when the conductive arm is pressed on the horizontal arm, the pressing plate abuts against the conductive arm.

2. An indoor high-voltage disconnector according to claim 1, characterized in that: The upper surface of the second terminal block is provided with a mounting seat, and the conductive arm is rotatably arranged on the mounting seat.

3. An indoor high-voltage disconnector according to claim 1, characterized in that: The base is provided with a driving shaft, the driving shaft and the conductive arm are connected through a transmission assembly, the transmission assembly comprises a movable insulating post and a connecting rod, the upper end of the movable insulating post is connected with the conductive arm, the lower end of the movable insulating post is rotatably connected with one end of the connecting rod, and the other end of the connecting rod is fixedly connected with the driving shaft.

4. An indoor high-voltage disconnector according to claim 1, characterized in that: The conductive arm comprises two parallel conductive sheets, and when the conductive sheets fall on the corresponding horizontal arms, the corresponding pressing plates abut against the conductive sheets.

5. An indoor high-voltage disconnector according to claim 1, characterized in that: The upper side of the first contact is further provided with a guide block, and the upper side of the guide block is provided with a guide inclined surface.

6. A box-type substation, characterized by: The box is provided with a combined switch composed of a disconnector, a circuit breaker and a grounding switch, and the disconnector is the indoor high-voltage disconnector according to any one of claims 1-5.

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