Self-locking device for switch cabinet

Abstract

The utility model discloses a self-locking device for a switch cabinet, and relates to the technical field of switch cabinets. The self-locking device comprises a handcart chamber. The partition plate is arranged in the handcart chamber and divides the handcart chamber into a first chamber and a second chamber; the partition plate is provided with a first pin hole matched with the first lock pin, and the first lock pin can be movably installed in the first pin hole in the first direction; the door body is hinged to the handcart chamber; the bottom end of the door body is provided with a second pin hole matched with the second lock pin, and the second lock pin can be movably installed in the handcart chamber along the first direction; the second lock pin has a first state and a second state, and in the first state, when the first lock pin retracts, the second lock pin is inserted into the second pin hole; and in the second state, when the second lock pin extends, the second lock pin and the door body are in a separated state. Therefore, through the cooperation of the first lock pin and the second lock pin, the self-locking device for the switch cabinet provided by the utility model enables the handcart chamber door to be interlocked with the circuit breaker handcart, and the safety performance is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of switch cabinets, and particularly relates to a self-locking device for a switch cabinet. Background Art

[0002] The primary function of switchgear is to open and close, control, and protect electrical equipment during the power generation, transmission, distribution, and conversion processes of power systems. Switchgear components primarily include circuit breakers, disconnectors, earthing switches, load switches, operating mechanisms, transformers, and various protective devices. They are primarily used in a variety of applications, including power plants, substations, petrochemicals, metallurgy and steel rolling, light industry and textiles, factories and mines, residential communities, and high-rise buildings. Switchgear is a crucial piece of electrical equipment in power transmission and transformation systems. Misoperation can cause equipment damage at best, power system failures at worst, and even endanger human life. Therefore, switchgear must possess comprehensive and reliable interlocking functionality to ensure the safe operation of both personnel and the power grid.

[0003] The circuit breaker trolley in a center-mounted switchgear has two positions within the trolley compartment: the working position and the test position. After commissioning the circuit breaker trolley in the test position, the trolley compartment door must be closed. The operating handle then drives the propulsion mechanism to advance the trolley to the working position. To ensure safety during operation and maintenance, the trolley compartment door cannot be opened while the trolley is in the working position (which may be in electrical operation). It can only be opened when the trolley is in the test position. However, in existing technology, the trolley compartment door is typically opened and closed with a padlock, allowing it to be opened at will regardless of whether the trolley is in the working position or not, posing a safety hazard. Summary of the Invention

[0004] The utility model provides a self-locking device for a switch cabinet, which is used to solve the technical problem in the prior art that a trolley room door cannot be interlocked with a circuit breaker trolley.

[0005] The utility model is achieved through the following technical solutions:

[0006] A self-locking device for a switch cabinet, comprising:

[0007] Cart room;

[0008] a partition installed in the cart chamber to separate the cart chamber into a first chamber and a second chamber, wherein the first chamber and the second chamber are arranged along a first direction;

[0009] a first locking pin, wherein the partition plate is provided with a first pin hole adapted for the first locking pin, and the first locking pin is movable along the first direction and installed in the first pin hole;

[0010] The door body is hinged to the handcart chamber, and the door body is used to open and close the first chamber;

[0011] A second locking pin, a second pin hole adapted to the second locking pin is provided at the bottom end of the door body, the second locking pin is movably installed in the handcart chamber along the first direction, and the first locking pin and the second locking pin are arranged at intervals along the second direction,

[0012] The first direction and the second direction are perpendicular to each other;

[0013] The second locking pin has a first state and a second state, wherein:

[0014] First state, when the first locking pin contracts, the second locking pin is inserted into the second pin hole;

[0015] Second state, when the second locking pin extends, the second locking pin is in a separated state from the door body.

[0016] Further, it further includes:

[0017] A first sleeve, installed in the second chamber and arranged along the first direction, the first locking pin is slidably installed in the first sleeve;

[0018] A first spring, one end is installed on the inner bottom wall of the first sleeve, and the other end is installed on the bottom end of the first locking pin.

[0019] Further, there is an included angle α between the top surface of the first locking pin and the top wall of the partition plate.

[0020] Further, the value range of the included angle α is 30°≤α≤70°.

[0021] Further, it further includes:

[0022] A second sleeve, installed in the second chamber and arranged along the first direction;

[0023] A second spring, installed between the second sleeve and the second locking pin.

[0024] Further, the top surface of the second locking pin is an arc surface.

[0025] Further, it further includes:

[0026] A slide bar, one end is slidably installed in the second sleeve along the first direction, the other end of the slide bar extends out of the second sleeve, and one end of the second spring is installed on the inner bottom wall of the second sleeve, and the other end is installed on the bottom end of the slide bar;

[0027] The connecting rod is installed at one end of the sliding rod extending out of the second sleeve. One end of the second locking pin is installed on the connecting rod, and one end of the connecting rod is slidably installed on the inner side wall of the second chamber. There is an included angle β between the other end of the connecting rod and the bottom wall of the partition plate;

[0028] The slider is slidably installed in the second chamber along the second direction, and one end of the slider abuts against the other end of the connecting rod;

[0029] One end of the push rod is installed on the side wall of the first locking pin, and there is an included angle γ between the other end of the push rod and the bottom wall of the partition plate, and it abuts against the other end of the slider.

[0030] Furthermore, the value range of the included angle β is 30° ≤ β ≤ 70°.

[0031] Furthermore, the value range of the included angle γ is 30° ≤ γ ≤ 70°.

[0032] Furthermore, it further includes a mounting block, which is installed in the second chamber and is located between the first sleeve and the second sleeve. A chute is opened at the top end of the mounting block, and the slider is slidably installed in the chute.

[0033] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0034] The self-locking device for a switch cabinet provided by the present utility model includes a handcart chamber, a partition plate, a first locking pin, a door body, and a second

[0035] locking pin. The partition plate is installed in the handcart chamber and divides the handcart chamber into a first chamber and a second chamber. The first chamber and the second chamber are arranged along a first direction. A first pin hole adapted to the first locking pin is opened on the partition plate. The first locking pin can be movably installed in the first pin hole along the first direction. The door body is hinged to the handcart chamber, and the door body is used to open and close the first chamber. A second pin hole adapted to the second locking pin is opened at the bottom end of the door body. The second locking pin can be movably installed in the handcart chamber along the first direction. The first locking pin and the second locking pin are arranged at intervals along a second direction, and the first direction and the second direction are perpendicular to each other. The second locking pin has a state one and a state two. In state one, when the first locking pin contracts, the second locking pin is inserted into the second pin hole. In state two, when the second locking pin extends, the second locking pin is in a separated state from the door body.

[0036] With the above structure, when using the self-locking device for switchgear provided by the present utility model, first place the circuit breaker trolley at the test position in the trolley compartment, and make the end of the circuit breaker trolley away from the door body abut against the top end of the first locking pin. Then close the door body, and drive the circuit breaker trolley to move towards the working position. As the circuit breaker trolley moves, it squeezes the first locking pin to contract along the first direction until the first locking pin is completely below the circuit breaker trolley. Then, the second locking pin is inserted into the second pin hole on the bottom wall of the door body. Until the circuit breaker finger moves to the working position, the first locking pin is still in the compressed state. In this way, the self-locking of the door body is completed. When it is necessary to repair the circuit breaker trolley, drive the circuit breaker trolley to move towards the test position again. Until the circuit breaker trolley moves to the test position, the force compressing the first locking pin gradually decreases, the first locking pin gradually elongates, and the second locking pin gradually withdraws from the second pin hole until the force compressing the first locking pin completely disappears and the second locking pin is completely separated from the door body, then the door body can be opened again to repair the circuit breaker trolley. In this way, through the cooperation of the first locking pin and the second locking pin, when the circuit breaker trolley leaves the test position, the door body cannot be opened; when the circuit breaker trolley is at the test position, that is, in the power-off state, the door body can be opened. Therefore, the self-locking device for switchgear provided by the present utility model interlocks the trolley compartment door with the circuit breaker trolley, that is, the trolley compartment door of the switchgear cannot be opened randomly, and the safety performance is higher. Brief Description of the Drawings

[0037] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, form a part of this application, and do not limit the embodiments of the present utility model. In the drawings:

[0038] Figure 1 is a schematic structural diagram of the self-locking device for switchgear provided by the embodiment of the present utility model;

[0039] Figure 2 is another schematic structural diagram of the self-locking device for switchgear provided by the embodiment of the present utility model.

[0040] Markings in the drawings and corresponding component names:

[0041] 1 - trolley compartment, 11 - first chamber, 12 - second chamber, 2 - partition, 21 - first pin hole, 3 - first locking pin, 4 - door body, 41 - second pin hole, 5 - second locking pin, 6 - first sleeve, 7 - first spring, 8 - second sleeve, 9 - second spring, 10 - slide bar, 20 - connecting rod, 30 - slider, 40 - push rod, 50 - mounting block, 501 - chute. Detailed Description of the Embodiments

[0042] To make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in combination with embodiments and drawings. The illustrative embodiments and descriptions of the present utility model are only used to explain the present utility model and do not limit the present utility model.

[0043] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component.

[0044] It should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0045] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0046] Embodiment:

[0047] The present embodiment provides a self-locking device for a switch cabinet to solve the technical problem that the door of the handcart compartment in the prior art cannot be interlocked with the circuit breaker handcart. The self-locking device for the switch cabinet includes a handcart compartment 1, a partition 2, a first locking pin 3, a door body 4, and a second locking pin 5, where:

[0048] The front end of the handcart compartment 1 has an opening.

[0049] The partition 2 is installed in the handcart compartment 1, dividing the handcart compartment 1 into a first chamber 11 and a second chamber 12. The first chamber 11 and the second chamber 12 are arranged along a first direction, that is, the first chamber 11 is located above the second chamber 12.

[0050] The partition 2 is provided with a first pin hole 21 adapted to the first locking pin 3. The first locking pin 3 is movably installed in the first pin hole 21 along the first direction, and one end of the first locking pin 3 is located in the first chamber 11 and the other end is located in the second chamber 12.

[0051] The door body 4 is hinged to the handcart chamber 1, that is, the door body 4 is located at the opening, and the door body 4 is used to open and close the first chamber 11.

[0052] A second pin hole 41 adapted to the second locking pin 5 is provided at the bottom end of the door body 4. The second locking pin 5 is movably installed in the handcart chamber 1 along a first direction. The first locking pin 3 and the second locking pin 5 are arranged at intervals along a second direction. The first direction and the second direction are perpendicular to each other. In this way, through the cooperation of the second locking pin 5 and the second pin hole 41, when the second locking pin 5 is inserted into the second pin hole 41, the door body 4 cannot be opened.

[0053] The second locking pin 5 has a first state and a second state, wherein:

[0054] In the first state, when the first locking pin 3 contracts, the second locking pin 5 is inserted into the second pin hole 41;

[0055] In the second state, when the second locking pin 5 extends, the second locking pin 5 is separated from the door body 4.

[0056] With the above structure, when using the self-locking device for switch cabinets provided by the present utility model, first place the circuit breaker handcart at the test position in the handcart chamber 1, and make the end of the circuit breaker handcart away from the door body 4 abut against

[0057] the top end of the first locking pin 3, then close the door body 4, and then drive the circuit breaker handcart to move towards the working position. The circuit breaker handcart moves, squeezing the first locking pin 3 to contract along the first direction until the first locking pin 3 is completely below the circuit breaker handcart, and then the second locking pin 5 is inserted into the second pin hole 41 on the bottom wall of the door body 4. Until the circuit breaker finger moves to the working position, the first locking pin 3 is still in the compressed state. In this way, the self-locking of the door body 4 is completed; when it is necessary to repair the circuit breaker handcart, drive the circuit breaker handcart to move towards the test position again until the circuit breaker handcart moves to the test position. The force compressing the first locking pin 3 gradually decreases, the first locking pin 3 gradually extends, and the second locking pin 5 gradually withdraws from the second pin hole 41 until the force compressing the first locking pin 3 completely disappears and the second locking pin 5 is completely separated from the door body 4, and then the door body 4 can be opened again to repair the circuit breaker handcart. In this way, through the cooperation of the first locking pin 3 and the second locking pin 5, when the circuit breaker handcart leaves the test position, the door body 4 cannot be opened; when the circuit breaker handcart is in the test position, that is, in the power-off state, the door body 4 can be opened. Therefore, the self-locking device for switch cabinets provided by the present utility model interlocks the door of the handcart chamber 1 with the circuit breaker handcart, that is, the door of the handcart chamber 1 of the switch cabinet cannot be opened randomly, and the safety performance is higher.

[0058] An optional implementation manner of this embodiment is as follows: It further includes a first sleeve 6 and a first spring 7, wherein:

[0059] One end of the first sleeve 6 is installed in the second chamber 12 and is arranged in the first direction, that is, the axis of the first sleeve 6 is vertically arranged. The first locking pin 3 is slidably installed in the first sleeve 6. In this way, through the setting of the first sleeve 6, the first locking pin 3 performs a linear reciprocating motion in the first direction.

[0060] One end of the first spring 7 is installed on the inner bottom wall of the first sleeve 6, and the other end is installed on the top end of the first locking pin 3. In this way, through the setting of the spring, when the spring returns, it will drive the first locking pin 3 to return simultaneously.

[0061] Optionally, the first spring 7 is a compression spring. In this way, when the first locking pin 3 is squeezed, the compression spring contracts; when the force squeezing the first locking pin 3 disappears, the first spring 7 returns, that is, the first spring 7 elongates and drives the first locking pin 3 to elongate synchronously.

[0062] Optionally, there is an included angle α between the top surface of the first locking pin 3 and the top wall of the partition plate 2, that is, the top surface of the first locking pin 3 is an inclined surface, and the top surface of the first locking pin 3 slopes downward from the working position of the circuit breaker trolley towards the test position of the circuit breaker trolley. In this way, when the circuit breaker trolley is in the test position, the edge where the bottom wall of the circuit breaker trolley intersects with the side wall of the circuit breaker trolley away from the door body 4 is in contact with the above-mentioned inclined surface. When the circuit breaker trolley moves from the test position towards the working position, it gradually squeezes the first locking pin 3 and makes the first locking pin 3 move downward until the highest point of the inclined surface abuts against the bottom wall of the circuit breaker trolley. The circuit breaker trolley continues to move until the circuit breaker trolley reaches the working position, and the first locking pin 3 is still below the circuit breaker trolley. Therefore, through the setting of the inclined surface, it is convenient for the circuit breaker trolley to squeeze the first locking pin 3 and avoid the first locking pin 3 being cut off by the circuit breaker trolley.

[0063] Optionally, the value range of the included angle α is 30°≤α≤70°. Exemplarily, the included angle α can be 30°, 40°, 50°, 60° or 70°, etc. If the included angle is too large, the upper part of the first locking pin 3 is thinner and is easily cut off; if the included angle is too small, it will cause material waste.

[0064] An alternative implementation of this embodiment is as follows: It further includes a second sleeve 8 and a second spring 9, where:

[0065] The second sleeve 8 is installed in the second chamber 12 and is arranged in the first direction, that is, the axes of the first sleeve 6 and the second sleeve 8

[0066] are arranged parallel to each other.

[0067] The second spring 9 is installed between the second sleeve 8 and the second locking pin 5. In this way, through the setting of the second spring 9, when the second spring 9 returns, it drives the second locking pin 5 to return together.

[0068] Optionally, the second spring 9 is a tension spring. In this way, when the second spring 9 is stretched, it drives the second locking pin 5 to move upward together; when the force for stretching the second spring 9 disappears, the second spring 9 returns, driving the second locking pin 5 to move downward together.

[0069] Optionally, the top surface of the second locking pin 5 is an arc surface. In this way, through the setting of the arc top, the second locking pin 5 is more convenient to be inserted into the second pin hole 41.

[0070] An alternative implementation of this embodiment is as follows: It further includes a slide bar 10, a connecting rod 20, a slider 30, and a push rod 40, where:

[0071] One end of the slide bar 10 is slidably installed in the second sleeve 8 along the first direction, and the other end of the slide bar 10 extends out of the second sleeve 8. One end of the second spring 9 is installed on the inner bottom wall of the second sleeve 8, and the other end is installed at the bottom end of the slide bar 10. In this way, through the cooperation of the slide bar 10 and the sleeve, the slide bar 10 performs a linear reciprocating motion along the first direction.

[0072] The connecting rod 20 is installed at the end of the slide bar 10 that extends out of the second sleeve 8. One end of the second locking pin 5 is installed on the connecting rod 20, and one end of the connecting rod 20 is slidably installed on the inner side wall of the second chamber 12, and there is an included angle β between the other end and the bottom wall of the partition 2, that is, the end of the connecting rod 20 close to the first locking pin 3 is a slope.

[0073] Optionally, the value range of the included angle β is 30° ≤ β ≤ 70°.

[0074] The slider 30 is slidably installed in the second chamber 12 along the second direction, and one end of the slider 30 abuts against the other end of the connecting rod 20, that is, one end of the slider 30 abuts against the slope of the connecting rod 20.

[0075] One end of the push rod 40 is installed on the side wall of the first locking pin 3, and there is an included angle γ between the other end and the bottom wall of the partition 2, and it abuts against the other end of the slider 30, that is, the end of the push rod 40 close to the slider 30 is a slope, and the other end of the slider 30 abuts against the slope of the push rod 40.

[0076] Optionally, the value range of the included angle γ is 30° ≤ γ ≤ 70°.

[0077] With the above structure, when the first locking pin 3 is compressed, it drives the push rod 40 installed on the first locking pin 3 to move downward synchronously, thereby pushing the slider 30 to move towards the connecting rod 20, causing the connecting rod 20 to move upward, and further causing the second locking pin 5 installed on the connecting rod 20 to move upward synchronously and insert into the second pin hole 41, thereby achieving the purpose of locking the door body 4; when the force squeezing the first locking pin 3 disappears, under the action of the first spring 7, the first locking pin 3 moves upward, driving the push rod 40 to move upward synchronously, the force pushing the slider 30 disappears, and the force squeezing the connecting rod 20 also disappears simultaneously. Under the action of the second spring 9, the connecting rod 20 moves downward, pushing the slider 30 to move away from the connecting rod 20, causing the slider 30 to reset. At the same time, when the connecting rod 20 moves downward, it drives the second locking pin 5 to move downward until the second locking pin 5 completely exits outside the second pin hole 41, thereby achieving the purpose of opening the door body 4.

[0078] An alternative implementation manner of this embodiment is as follows: It further includes a mounting block 50, which is installed in the second chamber 12 and is located between the first sleeve 6 and the second sleeve 8. A chute 501 is opened at the top of the mounting block 50, and the slider 30 is slidably installed in the chute 501. In this way, through the setting of the chute 501, it is avoided that the slider 30 is offset during the movement, resulting in the failure of the device.

[0079] The above specific implementation manners further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only the specific implementation manners of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-locking device for a switch cabinet, characterized in that, Comprising: A handcart chamber (1); A partition (2), installed inside the handcart chamber (1), separating the handcart chamber (1) into a first chamber (11) and a second chamber (12), the first chamber (11) and the second chamber (12) being arranged along a first direction; A first locking pin (3), a first pin hole (21) adapted to the first locking pin (3) being formed on the partition (2), the first locking pin (3) being movably installed along the first direction in the first pin hole (21); A door body (4), hinged to the handcart chamber (1), the door body (4) being used to open and close the first chamber (11); A second locking pin (5), a second pin hole (41) adapted to the second locking pin (5) being formed at the bottom end of the door body (4), the second locking pin (5) being movably installed along the first direction inside the handcart chamber (1), the first locking pin (3) and the second locking pin (5) being spaced apart along a second direction, the first direction and the second direction being perpendicular to each other; The second locking pin (5) has a first state and a second state, wherein: The first state, when the first locking pin (3) contracts, the second locking pin (5) is inserted into the second pin hole (41) Inside; The second state, when the second locking pin (5) extends, the second locking pin (5) is in a separated state from the door body (4).

2. The self-locking device for a switch cabinet according to claim 1, wherein Further comprising: A first sleeve (6), installed inside the second chamber (12) and arranged along the first direction, the first locking pin (3) being slidably installed inside the first sleeve (6); A first spring (7), one end being installed on the inner bottom wall of the first sleeve (6) and the other end being installed on the bottom end of the first locking pin (3).

3. The self-locking device for a switch cabinet according to claim 2, characterized in that, An included angle α is formed between the top surface of the first locking pin (3) and the top wall of the partition (2).

4. A self-locking device for a switch cabinet according to claim 3, characterized in that, The value range of the included angle α is 30° ≤ α ≤ 70°.

5. The self-locking device for a switch cabinet according to claim 2, wherein, Further comprising: A second sleeve (8), installed inside the second chamber (12) and arranged along the first direction; A second spring (9), installed between the second sleeve (8) and the second locking pin (5).

6. The self-locking device for a switch cabinet according to claim 5, characterized in that, The top surface of the second locking pin (5) is an arc surface.

7. The self-locking device for a switch cabinet according to claim 6, characterized in that, Further comprising: A slide bar (10), one end being slidably installed along the first direction inside the second sleeve (8), the other end of the slide bar (10) extending out of the second sleeve (8), and one end of the second spring (9) being installed on the inner bottom wall of the second sleeve (8) and the other end being installed on the bottom end of the slide bar (10); A connecting rod (20), installed at the end of the slide bar (10) extending out of the second sleeve (8), one end of the second locking pin (5) being installed on the connecting rod (20), and an included angle β being formed between one end of the connecting rod (20) and the inner side wall of the second chamber (12) and the bottom wall of the partition (2); A slider (30), slidably installed along the second direction inside the second chamber (12), and one end of the slider (30) abutting against the other end of the connecting rod (20); The push rod (40) has one end mounted on the side wall of the first locking pin (3), and there is an included angle γ between the other end and the bottom wall of the partition plate (2), and the other end of the push rod abuts against the slider (30).

8. A self-locking device for a switch cabinet according to claim 7, characterized in that, The value range of the included angle β is 30° ≤ β ≤ 70°.

9. The self-locking device for switchgear according to claim 8, characterized in that, The value range of the included angle γ is 30° ≤ γ ≤ 70°.

10. A self-locking device for a switch cabinet according to claim 7, characterized in that, It further includes a mounting block (50) which is installed in the second chamber (12) and is located between the first sleeve (6) and the second sleeve (8). A chute (501) is provided at the top of the mounting block (50), and the slider (30) is slidably installed in the chute (501).

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