Semi-solid-sealed switch structure for voltage transformer cabinet

Abstract

The utility model discloses a semi-solid-sealed switch structure for a voltage transformer cabinet, and particularly relates to the field of semi-solid-sealed switches, which comprises a front plate and a rear plate, a first cross beam and a second cross beam are arranged between the front plate and the rear plate, the first cross beam is positioned above the second cross beam, and a main shaft is arranged between the first cross beam and the second cross beam. The main shaft is rotationally connected with the front plate and the rear plate, and a mounting beam is arranged on one side of the main shaft and connected with the front plate and the rear plate; a plurality of moving contacts are arranged in the main shaft; the first cross beam is provided with connectors which are in one-to-one correspondence with the moving contacts. According to the utility model, the convex block is clamped with the mounting beam, so that the locking operation between the connector and the static contact is realized, the looseness between the connector and the static contact can be prevented, and the stability of the connection between the connector and the static contact is improved; after the pushing piece is moved to a fixed position, the convex clamping piece can be separated from the mounting beam at one time through the cooperation of the second spring and the pushing plate, and the fixation between the connector and the static contact can be quickly relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of semi-sealed switches, and more specifically, the utility model relates to a semi-sealed switch structure for a voltage transformer cabinet. Background Art

[0002] The voltage transformer cabinet (abbreviation: PT cabinet) plays an important role in the power system. Its full name is "voltage transformer cabinet", which is mainly used for voltage and current measurement to ensure the safe, stable and efficient operation of the power system. The PT cabinet is an indispensable part of the electrical system, and its core component is the voltage transformer; the voltage transformer is a device that transforms high voltage into low voltage while maintaining the proportional relationship of the current unchanged. This enables us to use low-voltage measuring instruments and protection devices to measure and protect the high-voltage system. When the voltage transformer cabinet is in use, a semi-sealed switch structure is required.

[0003] A semi-sealed switch, especially in the power system, mainly refers to a switch device with specific structure and functions. Such switches usually combine semi-sealed technology and the basic functions of switches to improve the stability, safety and reliability of the power system. The main functions are - power-off protection: when faults such as short circuit and overload occur in the circuit, the semi-sealed switch can automatically cut off the current to prevent the expansion of the fault and protect the stable operation of the power system; shunt protection: when the circuit load is too large, the semi-sealed switch can shunt the current to different circuits to avoid accidents caused by overloading of a single circuit; isolation protection: when the equipment is under maintenance or repair, the semi-sealed switch can isolate the circuit to provide a safe working environment for maintenance personnel.

[0004] Existing semi-sealed switches usually consist of a wiring board, wiring contacts, moving contacts, isolating contacts and other components. Among them, the wiring contacts are installed on the wiring board and are fixed. The moving contacts are installed on the main shaft, and the main shaft can rotate. Rotating the main shaft changes the position of the moving contacts. The moving contacts contact the isolating contacts to achieve the disconnection of the isolating switch and contact the wiring contacts to achieve the connection of the isolating switch.

[0005] However, in actual use, since the moving contacts rotate 90 degrees clockwise along the main shaft to connect with the wiring contacts, the bottom of the connection between the moving contacts and the wiring contacts is in a suspended state, which will affect the connection stability between the moving contacts and the wiring contacts and affect the operation of the semi-sealed switch. Summary of the Utility Model

[0006] A semi-sealed switch structure for a voltage transformer cabinet provided by the utility model aims to solve the problem that the bottom of the connection between the existing moving contacts and the wiring contacts is in a suspended state, which will affect the connection stability between the moving contacts and the wiring contacts and affect the operation of the semi-sealed switch.

[0007] To achieve the above object, the present utility model provides the following technical solution: A semi-sealed switch structure for a voltage transformer cabinet, including a front plate and a rear plate. A first cross beam and a second cross beam are provided between the front plate and the rear plate. The first cross beam is located above the second cross beam. A main shaft is provided between the first cross beam and the second cross beam. The main shaft is rotatably connected between the front plate and the rear plate. An installation beam is provided on one side of the main shaft. The installation beam is connected to the front plate and the rear plate. Multiple moving contacts are provided inside the main shaft. Connection heads corresponding to the moving contacts one by one are provided on the first cross beam. Isolating knives corresponding to the moving contacts one by one are provided on the second cross beam. Static contacts corresponding to the moving contacts one by one are provided inside the installation beam. A limiting component is provided at the bottom of the installation beam. The limiting component is used to limit the moving contacts. The limiting component includes a cross plate. The cross plate is rotatably connected to the installation beam. A vertical plate is provided on the cross plate. A convex engaging component is provided on the vertical plate. The convex engaging component is inserted into the installation beam. Pushing components are provided on both sides of the convex engaging component. The pushing components are movably connected to the installation beam.

[0008] In a preferred embodiment, the bottom of the moving contact is clamped with the isolating knife. When the moving contact is connected to the isolating knife, the power is cut off. When the moving contact is connected to the connection head, the power is turned on.

[0009] In a preferred embodiment, the convex engaging component includes a convex block. Grooves are provided on both surfaces of the convex block. Convex clamping blocks are provided inside the grooves. A plurality of first springs are provided between the convex clamping blocks and the grooves. The convex clamping blocks are in contact and clamped with the surface of the installation beam.

[0010] In a preferred embodiment, the pushing component includes a threaded sleeve. The threaded sleeve is threadedly connected to the installation beam. A movable rod is slidably sleeved inside the threaded sleeve. A second spring is provided between the movable rod and the inner wall of the threaded sleeve. A push plate is hinged at one end of the movable rod.

[0011] In a preferred embodiment, a plurality of limiting blocks are provided on the cross plate. The limiting blocks are located on both sides of the static contact.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. By setting the cross plate, vertical plate and convex engaging component, the connection head first contacts the vertical plate, forming an upward force on the vertical plate and the cross plate, so that the convex block on the vertical plate passes through the installation beam. Then, under the action of the first spring, the convex clamping block inside the convex block is unfolded, and the convex clamping block contacts the installation beam, enabling the vertical plate to contact the installation beam, making the cross plate perpendicular to the installation beam. And the bottom of the connection head contacts the cross plate, which can limit the position of the connection head and improve the stability of the connection between the connection head and the static contact.

[0014] 2. The utility model forms pressure on the convex-shaped clamping block by setting a pushing member, rotating the threaded sleeve to make the push plate at the bottom contact the convex-shaped block, causing the convex-shaped clamping block to retract inside the convex-shaped block. Then, through the elasticity of the second spring, a thrust is formed on the movable rod and the push plate. Moreover, the push plate and the movable rod are hinged. When the convex-shaped block moves, the angle of the push plate on the movable rod can be changed according to the moving angle of the convex-shaped block, so that the push plate fits the convex-shaped block, preventing the convex-shaped clamping block from rebounding, and enabling the convex-shaped block to be quickly separated from the mounting beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 is a schematic diagram of the main shaft structure of the utility model.

[0017] Figure 3 is a schematic diagram of the connector structure of the utility model.

[0018] Figure 4 is a schematic diagram of the sectional structure of the utility model.

[0019] Figure 5 is a schematic diagram of the mounting beam structure of the utility model.

[0020] Figure 6 is a schematic diagram of the state structure of the mounting beam of the utility model.

[0021] Figure 7 is a schematic diagram of the convex-shaped engaging member, the pushing member and the mounting beam structure of the utility model.

[0022] Figure 8 is a schematic diagram of the convex-shaped engaging member structure of the utility model.

[0023] Figure 9 is a schematic diagram of the pushing member structure of the utility model.

[0024] The reference numerals are: 1, front plate; 2, rear plate; 3, first cross beam; 31, connector; 4, second cross beam; 41, isolation knife; 5, main shaft; 51, moving contact; 6, mounting beam; 61, static contact; 7, limiting assembly; 71, cross plate; 72, vertical plate; 73, convex-shaped engaging member; 731, convex-shaped block; 732, convex-shaped clamping block; 733, first spring; 74, pushing member; 741, threaded sleeve; 742, movable rod; 743, second spring; 744, push plate; 75, limiting block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The present application will be further described in detail below with reference to the accompanying drawings. It is necessary to point out here that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0026] Referring to the attached drawings of the specification Figure 1 - Figure 9 , a semi-encapsulated switch structure for a voltage transformer cabinet, comprising a front plate 1 and a rear plate 2. A first cross beam 3 and a second cross beam 4 are provided between the front plate 1 and the rear plate 2. The first cross beam 3 is located above the second cross beam 4. A main shaft 5 is provided between the first cross beam 3 and the second cross beam 4. The main shaft 5 is rotatably connected between the front plate 1 and the rear plate 2. An installation beam 6 is provided on one side of the main shaft 5. The installation beam 6 is connected to the front plate 1 and the rear plate 2; a plurality of moving contacts 51 are provided inside the main shaft 5; connection heads 31 corresponding to the moving contacts 51 one by one are provided on the first cross beam 3; isolating knives 41 corresponding to the moving contacts 51 one by one are provided on the second cross beam 4; static contacts 61 corresponding to the moving contacts 51 one by one are provided inside the installation beam 6; a limiting component 7 is provided at the bottom of the installation beam 6. The limiting component 7 is used to limit the moving contacts 51. The limiting component 7 includes a cross plate 71. The cross plate 71 is rotatably connected to the installation beam 6. A vertical plate 72 is provided on the cross plate 71. A convex engaging component 73 is provided on the vertical plate 72. The convex engaging component 73 is inserted into the installation beam 6. Pushing components 74 are provided on both sides of the convex engaging component 73. The pushing components 74 are movably connected to the installation beam 6.

[0027] It should be noted that a blocking block is provided at the bottom of the installation beam 6. When the cross plate 71 rotates downward, it is blocked by the blocking block and will be in a state parallel to the installation beam 6. And the vertical plate 72 is vertically installed on the cross plate 71. Therefore, after the cross plate 71 rotates, the vertical plate 72 will be in a state perpendicular to the installation beam 6, which is convenient for subsequent use;

[0028] Since the cross section of the vertical plate 72 is convex and the protruding end is parallel to one side of the static contact 61, when the moving contact 51 moves, it can contact the vertical plate 72 and can push the vertical plate 72 to move. When the vertical plate 72 contacts the installation beam 6, the protruding end of the vertical plate 72 will contact the surface of the static contact 61.

[0029] Furthermore, the bottom of the moving contact 51 is clamped with the isolating knife 41. When the moving contact 51 is connected to the isolating knife 41, the power is cut off, and when the moving contact 51 is connected to the connection head 31, the power is turned on.

[0030] Furthermore, the convex engaging component 73 includes a convex block 731. Grooves are provided on both surfaces of the convex block 731. Convex clamping blocks 732 are provided inside the grooves. A plurality of first springs 733 are provided between the convex clamping blocks 732 and the grooves. The convex clamping blocks 732 are in contact and clamped with the surface of the installation beam 6.

[0031] It should be noted that since the hole size on the surface of the mounting beam 6 is smaller than the maximum size of the convex clamping block 732 when it expands on the convex block 731, when the convex block 731 enters the hole, the convex clamping block 732 will retract inside the convex block 731. After the convex block 731 completely enters the hole, the convex clamping block 732 expands and contacts the surface of the mounting beam 6, which can realize the connection between the vertical plate 72 and the mounting beam 6.

[0032] Furthermore, the pusher 74 includes a threaded sleeve 741, which is threadedly connected to the mounting beam 6. A movable rod 742 is slidably sleeved inside the threaded sleeve 741. A second spring 743 is provided between the movable rod 742 and the inner wall of the threaded sleeve 741. One end of the movable rod 742 is hinged with a push plate 744.

[0033] It should be noted that the threaded sleeve 741 is moved to the inner side of the mounting beam 6 so that the push plate 744 contacts the convex block 731. The elastic force of the second spring 743 forms a pressure on the movable rod 742 and the push plate 744, making the push plate 744 fit with the convex block 731. And when the convex block 731 moves at an arc angle, since the push plate 744 and the movable rod 742 are hinged, the angle of the push plate 744 on the movable rod 742 can be changed according to the angle of the convex block 731, and the convex clamping block 732 can be retracted into the convex block 731, realizing the quick separation of the vertical plate 72 and the mounting beam 6.

[0034] Furthermore, a plurality of limit blocks 75 are provided on the horizontal plate 71, and the limit blocks 75 are located on both sides of the static contact 61.

[0035] It should be noted that the limit blocks 75 contact the bottom of the moving contact 51, which has an effect of lifting the moving contact 51, reducing the gap between the vertical plate 72 and the mounting beam 6, and making the moving contact 51 fit with the static contact 61.

[0036] Working principle: Rotate the main shaft 5 to drive the moving contact 51, so that it rotates along the connecting head 31 and separates from the isolating knife 41, and the moving contact 51 is clamped with the static contact 61 to realize the energization operation. On the contrary, the moving contact 51 is clamped with the connecting head 31 to realize the power-off operation.

[0037] When the main shaft 5 drives the moving contact 51 to rotate, the moving contact 51 moves below the vertical plate 72 and contacts it. The moving contact 51 forms an upward thrust on the vertical plate 72, and the vertical plate 72 drives the horizontal plate 71 to move, bringing the vertical plate 72 into contact with the surface of the mounting beam 6, and the horizontal plate 71 contacts the bottom of the static contact 61. The convex block 731 on the vertical plate 72 will pass through the mounting beam 6;

[0038] When the convex clamping blocks 732 on both sides of the convex block 731 come into contact with the inner wall of the hole on the surface of the mounting beam 6, due to the pressure between the convex clamping blocks 732 and the hole, the convex clamping blocks 732 will retract inside the groove, and the first spring 733 will contract. When the convex block 731 completely passes through the mounting beam 6, due to the elasticity of the first spring 733, a thrust is generated on the convex clamping blocks 732 to push the convex clamping blocks 732 out of the groove, making the convex clamping blocks 732 fit the surface of the mounting beam 6. This can not only fix the cross plate 71 in a state perpendicular to the mounting beam 6, making the limiting block 75 contact the bottom of the moving contact 51, but also limit the moving contact 51 and lock the position of the moving contact 51, which can prevent the moving contact 51 from separating from the static contact 61 and improve the stability of the moving contact 51.

[0039] By rotating the pushing member 74, the top of the threaded sleeve 741 is parallel to the mounting beam 6, and the threaded sleeve 741 is completely moved to the inside of the mounting beam 6. Due to the second spring 743 provided between the threaded sleeve 741 and the movable rod 742, a thrust is formed on the movable rod 742, which can make the bottom surface of the push plate 744 contact the surface of the convex block 731 and form a pressure on the convex clamping block 732, causing the convex clamping block 732 to retract inside the convex block 731, and the fixation between the vertical plate 72 and the mounting beam 6 can be released.

[0040] Then, by rotating the moving contact 51 to form a thrust on the cross plate 71, the vertical plate 72 is separated from the mounting beam 6, and the convex engaging member 73 moves along the hole on the surface of the mounting beam 6. Since the convex engaging member 73 moves in an arc, through the hinge between the push plate 744 and the movable rod 742 and the elasticity of the second spring 743, the angle between the push plate 744 and the movable rod 742 can be changed, making the push plate 744 completely fit the convex block 731, which can prevent the convex clamping block 732 from rebounding repeatedly.

[0041] The utility model realizes the locking operation between the moving contact 51 and the static contact 61 by engaging the convex block 731 with the mounting beam 6, which can prevent loosening between the moving contact 51 and the static contact 61 and improve the connection stability between the moving contact 51 and the static contact 61; after moving the pushing member 74 to a fixed position, through the cooperation of the second spring 743 and the push plate 744, the convex engaging member 73 can be separated from the mounting beam 6 at one time, and the fixation between the moving contact 51 and the static contact 61 can be quickly released.

[0042] The above embodiments only represent several implementation manners of the utility model, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the utility model.

Claims

1. A semi-encapsulated switch structure for a voltage transformer cabinet, characterized in that: It includes a front plate (1) and a rear plate (2). A first cross beam (3) and a second cross beam (4) are provided between the front plate (1) and the rear plate (2). The first cross beam (3) is located above the second cross beam (4). A main shaft (5) is provided between the first cross beam (3) and the second cross beam (4). The main shaft (5) is rotatably connected between the front plate (1) and the rear plate (2). An installation beam (6) is provided on one side of the main shaft (5), and the installation beam (6) is connected to the front plate (1) and the rear plate (2). A plurality of moving contacts (51) are provided inside the main shaft (5). Connectors (31) corresponding to the moving contacts (51) one by one are provided on the first cross beam (3). Isolating knives (41) corresponding to the moving contacts (51) one by one are provided on the second cross beam (4). Static contacts (61) corresponding to the moving contacts (51) one by one are provided inside the installation beam (6). A limiting component (7) is provided at the bottom of the installation beam (6). The limiting component (7) is used to limit the moving contacts (51). The limiting component (7) includes a cross plate (71). The cross plate (71) is rotatably connected to the installation beam (6). A vertical plate (72) is provided on the cross plate (71). A convex engaging component (73) is provided on the vertical plate (72). The convex engaging component (73) is inserted into the installation beam (6). Pushing components (74) are provided on both sides of the convex engaging component (73), and the pushing components (74) are movably connected to the installation beam (6).

2. The semi-sealed switch structure for a voltage transformer cabinet according to claim 1, characterized in that: The bottom of the moving contact (51) is clamped with the isolating knife (41). The moving contact (51) is disconnected from the isolating knife (41), and the moving contact (51) is connected to the connector (31) to be energized.

3. A semi-sealed switch structure for a voltage transformer cabinet according to claim 2, characterized in that: The convex engaging component (73) includes a convex block (731). Grooves are provided on both side surfaces of the convex block (731). Convex clamping blocks (732) are provided inside the grooves. A plurality of first springs (733) are provided between the convex clamping blocks (732) and the grooves. The convex clamping blocks (732) are in contact and engaged with the surface of the installation beam (6).

4. A semi-sealed switch structure for a voltage transformer cabinet according to claim 3, characterized in that: The pushing component (74) includes a threaded sleeve (741). The threaded sleeve (741) is threadedly connected to the installation beam (6). A movable rod (742) is slidably sleeved inside the threaded sleeve (741). A second spring (743) is provided between the movable rod (742) and the inner wall of the threaded sleeve (741). A push plate (744) is hinged at one end of the movable rod (742).

5. A semi-encapsulated switch structure for a voltage transformer cabinet according to claim 4, characterized in that: A plurality of limiting blocks (75) are provided on the cross plate (71), and the limiting blocks (75) are located on both sides of the static contact (61).

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