Box-in opening integrated locking device

Abstract

The utility model discloses a Box -in opening integrated locking device in the field of electric power equipment facilities, including the fixed frame of noise reduction board, and the fixed frame is installed on the noise reduction board rotation, and the fixed frame inner wall is installed with self -lock type gas spring, and the output of self -lock type gas spring is connected with the noise reduction board, the utility model discloses a self -lock type gas spring is opened automatically when setting when the fire occurs, and the limiting lock block on the piston rod is limited to the piston rod through setting, makes it still can ensure the piston rod to keep the state of propping open under the condition that the gas spring cylinder loses pressure or leaks, thereby enhancing the stability and security of device. In this way, the structure of the utility model is adopted, the noise reduction board can keep the normally open state when the fire occurs, which facilitates fire fighting and rescue, and also avoids the problems of explosion caused by the re-sealing state of the converter station, thereby indirectly protecting the equipment around the converter station from being damaged.

Description

Technical Field

[0001] This utility model relates to the field of power equipment and facilities, specifically a box-in integrated locking device. Background Technology

[0002] Converter stations are the most critical nodes in DC transmission lines, and ensuring their safe and stable operation is crucial for DC power transmission. Converter transformers are among the most important pieces of equipment in a converter station, and as the primary noise source within the station, they require appropriate noise reduction measures to lower boundary noise and achieve an environmentally friendly power grid. Box-insulation enclosures are specialized noise reduction devices for converter transformers, widely used in noise reduction projects due to their significant noise reduction effect. However, as enclosed devices, box-insulation enclosures can be vulnerable to explosions if a fire occurs due to a converter transformer malfunction. The sudden increase in internal pressure could cause an explosion, resulting in irreversible damage to surrounding equipment and substantial economic losses.

[0003] An existing patent application with application number CN202022287017.3, entitled "A Sound Absorption and Insulation Safety Device for Converter Station Box-in," discloses a sound absorption and insulation safety device for a converter station box-in. The device includes a safety passage connecting the box-in's interior to its external space; a noise-reducing plate closable to the safety passage; an opening / closing mechanism with its output connected to the noise-reducing plate; and a thermal fuse, with both ends connected to the safety passage and the noise-reducing plate, respectively. When a fire occurs inside the box-in, causing the temperature at the thermal fuse to exceed its melting point, the fuse melts, triggering the opening / closing mechanism to open the noise-reducing plate. This invention achieves superior fire intervention and fire control. Furthermore, after the fire is extinguished, only the thermal fuse wire needs to be replaced, facilitating reuse and saving investment.

[0004] However, the drawback of the aforementioned sound-absorbing and sound-insulating safety device in the converter station box-in is that, in the event of a fire, the opened noise-reducing panel does not have a self-locking function and is unstable in maintaining the open state. It is easy to close it again, causing the converter station to re-seal and resulting in an explosion. This can cause irreversible damage to the equipment around the converter transformer and result in huge economic losses.

[0005] Based on this, the present invention designs a Box-in integrated locking device to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a box-in integrated locking device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a Box-in integrated locking device, comprising a noise-reducing plate and a fixed frame, wherein the fixed frame is fixedly installed at the entrance and exit of a safety passage, the noise-reducing plate is rotatably connected to the fixed frame, and a self-locking gas spring is installed on the inner wall of the fixed frame, wherein the output end of the self-locking gas spring is connected to the noise-reducing plate.

[0008] Preferably, the self-locking gas spring includes a housing and a compression gas spring. The top surface of the housing is provided with a window, and the lower end is hinged to the fixed frame. The cylinder of the compression gas spring is fixed to the bottom of the inner cavity of the housing. The piston rod end of the compression gas spring passes through the window and is hinged to the noise reduction plate. A limit lock block is fixedly installed on the side wall of the piston rod. When the piston rod of the compression gas spring extends to the position, the limit lock block can abut against the housing to limit the piston rod (6) so that the piston rod (6) cannot retract.

[0009] Preferably, the limiting lock block is provided with a guide slope. When the piston rod extends upward, the limiting lock block can pass over the top surface of the outer shell. When the piston rod of the compressed gas spring retracts, the limiting lock block can abut against the top surface of the outer shell, preventing the piston rod from retracting.

[0010] Preferably, the window has an inner guide surface parallel to the guide slope of the limiting lock block. When the piston rod extends upward, the guide slope of the limiting lock block cooperates with the inner guide surface of the window for guidance.

[0011] Preferably, a locking groove is provided on the inner side of the window, so that when the piston rod extends upward, the limiting locking block can be embedded in the locking groove to lock the piston rod and prevent the piston rod from retracting.

[0012] Specifically, the limiting lock block or the window is provided with a guide slope.

[0013] Preferably, a spring is fixedly installed on the inner wall of the outer casing, with the other end of the spring contacting the piston rod. The spring and the limiting locking block are located on both sides of the piston rod. Specifically, a guide groove is formed on the side wall of the piston rod, and a guide block is fixedly installed at the end of the spring that contacts the piston rod, with the guide block slidingly engaging with the guide groove.

[0014] Preferably, a spring is fixedly installed on the inner wall of the outer shell, and the spring and the limiting lock block are located on the same side of the piston rod; a guide block is fixedly installed on the other end of the spring, and a guide groove is formed on the side wall of the piston rod, and the guide block slides in cooperation with the guide groove.

[0015] Preferably, there are two self-locking gas springs, which are respectively installed on both sides of the fixed frame and arranged symmetrically.

[0016] Compared with the prior art, the beneficial effects of this utility model are: the self-locking gas spring automatically opens in the event of a fire, and the piston rod is locked by a limiting locking block set on the piston rod, so that the piston rod can still be kept in the open state even if the compressed gas spring cylinder loses pressure or leaks, thereby enhancing the stability and safety of the device.

[0017] By adopting the structure of this utility model, the noise reduction board can remain open in the event of a fire, which facilitates fire fighting and rescue, and will not cause problems such as explosions due to the converter station resealing, thus indirectly protecting the equipment around the converter station from damage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of the self-locking gas spring of this utility model;

[0020] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0021] Figure 3 This is a side view of the structure of this utility model.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1-Noise reduction plate, 2-Fixing frame, 3-Self-locking gas spring, 4-Outer shell, 5-Spring, 6-Piston rod, 7-Limiting lock block, 8-Compressed gas spring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see the appendix Figure 2 and attached Figure 3This utility model provides a technical solution: a box-in integrated locking device, including a noise reduction plate 1 and a fixed frame 2. The fixed frame 2 is fixedly installed at the entrance and exit of the safety passage. The noise reduction plate 1 is rotatably installed on the fixed frame 2. A self-locking gas spring 3 is installed on the inner wall of the fixed frame 2. The output end of the self-locking gas spring 3 is connected to the noise reduction plate 1. When the noise reduction plate 1 is working normally, it maintains a sealed state with the fixed frame 2 through its own weight and the tension of the self-locking gas spring 3, while isolating the operating noise of the equipment. When a fire occurs, the noise reduction plate 1 opens, making it convenient for firefighters to extinguish the fire inside and reduce losses.

[0026] Please see the appendix Figure 1 Two self-locking gas springs 3 are provided, and the two self-locking gas springs are respectively installed on both sides of the fixed frame and arranged symmetrically. Each self-locking gas spring 3 includes a housing 4 and a compression gas spring 8. The top surface of the housing 4 has a window, and the compression gas spring 8 is fixedly installed in the inner cavity. A limit locking block 7 is fixedly installed on the side wall of the piston rod 6 above the compression gas spring 8, and the limit locking block 7 cooperates with the housing 4 to limit movement. Specifically, the limit locking block 7 has a guide slope. When the piston rod 6 extends upward, the limit locking block 7 can pass over the top surface of the housing 4. When the piston rod 6 retracts, the limit locking block 7 can abut against the top surface of the housing, preventing the piston rod 6 from retracting. Preferably, the window has a guide inner surface parallel to the guide slope of the limit locking block. When the piston rod extends upward, the guide slope of the limit locking block 7 cooperates with the guide inner surface of the window for guidance. This design allows the limit locking block 7 to smoothly pass over the window.

[0027] A spring 5 is fixedly installed on the inner wall of the outer casing 4, with the other end of the spring 5 contacting the piston rod 6. An axially oriented guide groove is formed on the side wall of the piston rod 6, and a guide block is fixedly installed at the end of the spring 5. When the piston rod 6 extends upward, the guide block slides against the guide groove, ensuring that the spring does not deviate and acts on the piston rod in real time. Figure 1 As shown, spring 5 and limit locking block 7 are located on both sides of piston rod 6. The spring force pushes the limit locking block 7 close to the window edge to achieve abutment and limitation. Of course, when spring 5 and limit locking block 7 are on the same side of piston rod 6, the spring tension can also make the limit locking block 7 close to the window edge to achieve the same effect.

[0028] Alternatively, the limiting lock block 7 and the outer casing 4 can also be locked together by a snap-fit ​​mechanism, which can also limit the piston rod and prevent it from retracting. Specifically, a locking groove is provided on the inner side of the window. When the piston rod extends upwards, the limiting lock block can engage with the locking groove, locking the piston rod and preventing it from retracting.

[0029] In the event of a fire, the compressed gas spring 8 is heated, causing the internal gas to expand. The piston rod 6 of the compressed gas spring 8 automatically extends. When the limiting locking block 7 passes the top surface of the outer casing 4, under the action of the spring 5, the limiting locking block 7 limits the piston rod 6 to the outer casing 4. At this time, the noise-reducing plate 1 is fully open, facilitating firefighters to extinguish the fire inside. If the fire cannot be extinguished in time, the fire will continue to heat the self-locking gas spring 3, potentially damaging it. However, because the limiting locking block 7 abuts against the outer casing 4 after the piston rod 6 of the self-locking gas spring 3 extends, it prevents the piston rod 6 from retracting, thus maintaining the noise-reducing plate 1 open. Therefore, even when the fire cannot be extinguished in time, the self-locking gas spring 3 in this invention can keep the noise-reducing plate 1 open, preventing it from losing support and closing, thus avoiding secondary hazards.

[0030] The working process of this utility model is as follows: The self-locking gas spring 3 is installed between the fixed frame 2 and the noise reduction plate 1. Under normal working conditions, the noise reduction plate 1 remains closed to isolate working noise. In the event of a fire, the self-locking gas spring 3 is activated, and the compressed gas spring 8 pushes out the piston rod 6. The pushed-out piston rod 6 opens the noise reduction plate 1, and the limiting locking block 7, which is fixedly installed on the piston rod 6, moves outside the outer shell 4 to limit the piston rod 6. The spring 5 applies force to the piston rod 6 to ensure the stability of the piston rod 6.

[0031] By using the limit lock block 7, the device remains open even in the event of cylinder depressurization or leakage of the gas spring, increasing its stability and safety and facilitating firefighting and rescue. It also prevents secondary hazards caused by the noise reduction plate 1 closing again. After firefighting is complete, pushing the piston rod 6 moves the limit lock block 7 towards the center of the window. Once it disengages from the top surface of the outer casing, the limit is released, and the piston rod 6 retracts back to its original position, allowing for repeated use and cost savings.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A box-in integrated locking device, comprising a noise-reducing plate (1) and a fixing frame (2), wherein the fixing frame (2) is fixedly installed at the entrance and exit of a safety passage, characterized in that: The noise reduction plate (1) is rotatably connected to the fixed frame (2), and a self-locking gas spring (3) is installed on the inner wall of the fixed frame (2). The output end of the self-locking gas spring (3) is connected to the noise reduction plate (1).

2. The Box-in integrated locking device according to claim 1, characterized in that: The self-locking gas spring (3) includes a housing (4) and a compression gas spring (8). The top surface of the housing (4) is provided with a window, and the lower end is hinged to the fixed frame (2). The cylinder of the compression gas spring (8) is fixed to the bottom of the inner cavity of the housing (4). The end of the piston rod (6) of the compression gas spring (8) passes through the window and is hinged to the noise reduction plate (1). A limit lock block (7) is fixedly installed on the side wall of the piston rod (6). When the piston rod (6) of the compression gas spring (8) extends to the position, the limit lock block (7) can abut against the housing (4) to limit the piston rod (6) so that the piston rod (6) cannot retract.

3. The Box-in integrated locking device according to claim 2, characterized in that: The limiting lock block (7) is provided with a guide slope. When the piston rod (6) extends upward, the limiting lock block (7) can pass over the top surface of the outer shell (4). When the piston rod (6) of the compressed air spring (8) retracts, the limiting lock block (7) can abut against the top surface of the outer shell (4), making it impossible for the piston rod (6) to retract.

4. The Box-in integrated locking device according to claim 3, characterized in that: The window is provided with a guide inner surface parallel to the guide slope of the limiting lock block (7). When the piston rod (6) extends upward, the guide slope of the limiting lock block (7) cooperates with the guide inner surface of the window for guidance.

5. The Box-in integrated locking device according to claim 2, characterized in that: A locking groove is provided on the inner side of the window. When the piston rod (6) extends upward, the limiting locking block (7) can be embedded in the locking groove to lock the piston rod and prevent the piston rod (6) from retracting.

6. The Box-in integrated locking device according to claim 5, characterized in that: The limiting lock block (7) or the window is provided with a guide slope.

7. The Box-in integrated locking device according to any one of claims 2-6, characterized in that: A spring (5) is fixedly installed on the inner wall of the outer shell (4). The other end of the spring (5) is in contact with the piston rod (6). The spring (5) and the limiting lock block (7) are located on both sides of the piston rod (6).

8. The Box-in integrated locking device according to claim 7, characterized in that: A guide groove is provided on the side wall of the piston rod (6), and a guide block is fixedly installed at the end of the spring (5) that contacts the piston rod (6), and the guide block slides in conjunction with the guide groove.

9. The Box-in integrated locking device according to any one of claims 2-6, characterized in that: A spring (5) is fixedly installed on the inner wall of the outer shell (4). The spring (5) and the limiting lock block (7) are located on the same side of the piston rod (6). A guide block is fixedly installed on the other end of the spring (5). A guide groove is provided on the side wall of the piston rod (6). The guide block slides in cooperation with the guide groove.

10. The Box-in integrated locking device according to any one of claims 1-6, characterized in that: Two self-locking gas springs (3) are provided, and the two self-locking gas springs (3) are respectively installed on both sides of the fixed frame (2) and arranged symmetrically.

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