Multi-layer sealing structure of gas insulation container for high-voltage switch

Abstract

The utility model discloses a multi-layer sealing structure of a gas insulation container for a high-voltage switch, which comprises a shell, a protective frame fixedly connected to the outer wall of the shell, a protective door clamped outside the protective frame, and a mounting plate, the inner wall of the mounting plate is fixedly connected with a sealing assembly, and the outer wall of the mounting plate is fixedly connected with the protective door. The interior of the sealing assembly is connected with a multi-layer protection box in a sliding manner. The utility model relates to the technical field of power equipment. According to the multi-layer sealing structure of the gas insulation container for the high-voltage switch, the multi-layer protection box can be firmly fixed in the sealing assembly through the sealing assembly, and the insulating gas is difficult to leak through multi-layer sealing of the sealing assembly and the multi-layer protection box on the insulating gas; in the case of vibration, the sealing assembly can reduce the influence of the vibration on the inner-layer protection box, so that the insulating gas is still difficult to leak when the vibration occurs.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, specifically to a multi-layer sealing structure of a gas-insulated container for high-voltage switches. Background Technology

[0002] Gas-insulated containers for high-voltage switches are one of the core components of gas-insulated switchgear. They are mainly used to seal high-voltage electrical components in metal containers filled with insulating gas at a certain pressure. They are widely used in high-voltage and ultra-high-voltage power systems.

[0003] Existing gas-insulated containers for high-voltage switches, when used in substations or areas with significant vibration, can experience loosening of the sealing interface due to mechanical vibration. This often leads to the failure of the single-layer sealing structure, resulting in leakage of insulating gas. Such leakage can cause a decrease in the insulation performance of the equipment, potentially triggering partial discharge and damaging the equipment. Furthermore, leakage can also cause corrosion of the equipment, reducing its service life. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a multi-layer sealing structure for a gas insulating container for high-voltage switches. By combining multiple protective boxes with sealing components, the insulating gas is sealed in multiple layers. At the same time, the impact of vibration on the structure is reduced, making it difficult for the insulating gas to leak even when exposed to vibration. This makes it difficult for the insulating gas to cause adverse effects on the equipment.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer sealing structure for a gas insulating container for high-voltage switches, comprising: an outer shell, a protective frame fixedly connected to the outer wall of the outer shell, a protective door snapped onto the outside of the protective frame, and a mounting plate, a sealing assembly fixedly connected to the inner wall of the mounting plate, a multi-layer protective box slidably connected inside the sealing assembly, the sealing assembly including a flange, a first sealing strip fixedly connected to the outer wall of the flange, a first slot formed on the inner wall of the flange, a chuck slidably connected to the outer wall of the flange, a push plate overlapping the outer wall of the chuck, a first telescopic rod fixedly connected to the side of the push plate near the mounting plate, and a first spring sleeved on the outside of the first telescopic rod. Through the sealing of the multi-layer protective box by the sealing assembly, the sealing effect of the multi-layer protective box on the insulating gas is improved, thus making it difficult for the insulating gas to leak.

[0008] Preferably, the outer wall of the protective frame is slidably connected to the inner wall of the protective door, the inner wall of the protective door is fixedly connected to the inner wall of the chuck by bolts, and the inner wall of the protective door is fixedly connected to the inner wall of the flange by bolts, so that the connection between the protective door and the protective frame is tighter, making it difficult for the protective door to loosen or fall off.

[0009] Preferably, the end of the first telescopic rod away from the push plate is fixedly connected to the mounting plate, one end of the first spring is fixedly connected to the outer wall of the push plate, and the other end of the first spring is fixedly connected to the mounting plate. Through the first telescopic rod and the first spring, the push plate can apply force to the chuck, making the connection between the chuck and the flange tighter.

[0010] Preferably, the multi-layer protective box includes an outer protective box, the outer protective box has a second slot on its exterior, a door is slidably connected to the inner wall of the second slot, a second telescopic rod is fixedly connected to the inner wall of the outer protective box, a second spring is sleeved on the exterior of the second telescopic rod, an inner protective box is fixedly connected to the end of the second telescopic rod away from the inner wall of the outer protective box, and a second sealing strip is fixedly connected to the side of both the inner and outer protective boxes near the door. Through the double-layer design of the multi-layer protective box, the insulating gas is more difficult to leak.

[0011] Preferably, one end of the second spring is fixedly connected to the inner wall of the outer protective box, and the other end of the second spring is fixedly connected to the outer wall of the inner protective box. The impact of vibration on the inner protective box can be reduced through the second spring and the second telescopic rod.

[0012] Preferably, the inner wall of the chuck near the flange overlaps with the outer wall of the door. The chuck allows for a tighter seal between the outer and inner protective boxes.

[0013] (III) Beneficial Effects

[0014] This invention provides a multi-layer sealing structure for a gas-insulated container used in high-voltage switches. It offers the following advantages:

[0015] (i) The multi-layer sealing structure of the gas insulation container for the high-voltage switch can firmly fix the multi-layer protective box inside the sealing component through the sealing component. Through the multi-layer sealing of the insulating gas by the sealing component and the multi-layer protective box, it is difficult for the insulating gas to leak, thus making it difficult for the phenomenon of insulating gas leakage to cause adverse effects on the equipment.

[0016] (ii) The multi-layer sealing structure of the gas insulation container for the high-voltage switch can effectively reduce the impact of vibration on the inner protective box when exposed to vibration by the second telescopic rod and the second spring inside the multi-layer protective box, making it difficult for the insulating gas to leak when exposed to vibration.

[0017] (III) The multi-layer sealing structure of the gas insulating container for the high-voltage switch, when the first sealing strip inside the sealing structure ages or is damaged, will cause a large gap between the chuck and the flange. At this time, under the action of the first telescopic rod and the first spring, the push plate will apply pressure to the chuck, which will reduce the gap between the chuck and the flange, making it difficult for the insulating gas to leak through the gap between the chuck and the flange. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of part of the internal structure of the protective frame of this utility model;

[0020] Figure 3 This is a schematic diagram of the sealing assembly of this utility model;

[0021] Figure 4 This is an exploded view of the multi-layer protective box of this utility model.

[0022] In the diagram: 1. Outer shell; 2. Protective frame; 3. Sealing assembly; 30. Flange; 31. First sealing strip; 32. First slot; 33. Chuck; 34. First spring; 35. First telescopic rod; 36. Push plate; 4. Protective door; 5. Multi-layer protective box; 50. Outer protective box; 51. Second slot; 52. Box door; 53. Second telescopic rod; 54. Second spring; 55. Inner protective box; 56. Second sealing strip; 6. Mounting plate. Detailed Implementation

[0023] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a multi-layer sealing structure for a gas insulating container for high-voltage switches, comprising: an outer shell 1, a protective frame 2 fixedly connected to the outer wall of the outer shell 1, a protective door 4 snapped onto the outside of the protective frame 2, and an mounting plate 6, a sealing component 3 fixedly connected to the inner wall of the mounting plate 6, and a multi-layer protective box 5 slidably connected inside the sealing component 3. Through the sealing component 3 and the multi-layer protective box 5, multi-layer sealing of the insulating gas can be achieved, thereby making it difficult for the insulating gas to leak.

[0025] The sealing assembly 3 includes a flange 30, a first sealing strip 31 fixedly connected to the outer wall of the flange 30, a first groove 32 formed on the inner wall of the flange 30, a chuck 33 slidably connected to the outer wall of the flange 30, a push plate 36 overlapping the outer wall of the chuck 33, a first telescopic rod 35 fixedly connected to the side of the push plate 36 near the mounting plate 6, a first spring 34 sleeved on the outside of the first telescopic rod 35, the outer wall of the protective frame 2 slidably connected to the inner wall of the protective door 4, and the inner wall of the protective door 4 and the inner wall of the chuck 33 fixedly connected by bolts. The inner wall of the protective door 4 is fixedly connected to the inner wall of the flange 30 by bolts. The end of the first telescopic rod 35 away from the push plate 36 is fixedly connected to the mounting plate 6. One end of the first spring 34 is fixedly connected to the outer wall of the push plate 36, and the other end of the first spring 34 is fixedly connected to the mounting plate 6. The first telescopic rod 35 and the first spring 34 can pull the push plate 36 to move towards the chuck 33, further making the connection between the chuck 33 and the flange 30 tighter, and making the sealing assembly 3 seal the multi-layer protective box 5 more tightly.

[0026] The multi-layer protective box 5 includes an outer protective box 50. A second slot 51 is provided on the outside of the outer protective box 50. A box door 52 is slidably connected to the inner wall of the second slot 51. A second telescopic rod 53 is fixedly connected to the inner wall of the outer protective box 50. A second spring 54 is sleeved on the outside of the second telescopic rod 53. An inner protective box 55 is fixedly connected to the end of the second telescopic rod 53 away from the inner wall of the outer protective box 50. A second sealing strip 56 is fixedly connected to both the inner protective box 55 and the side of the outer protective box 50 near the box door 52. One end of the second spring 54 is fixedly connected to the inner wall of the outer protective box 50, and the other end of the second spring 54 is fixedly connected to the outer wall of the inner protective box 55. The inner wall of the chuck 33 near the flange 30 overlaps with the outer wall of the box door 52. When vibration occurs, the second spring 54 and the second telescopic rod 53 can reduce the impact of vibration on the inner protective box 55, so that the structure can still maintain a good sealing effect when facing vibration, making it difficult for insulating gas to leak.

[0027] Working principle

[0028] When in use, first seal the multi-layer protective box 5, then evacuate the air inside the multi-layer protective box 5 through the air inlet on the top of the multi-layer protective box 5, then fill the multi-layer protective box 5 with insulating gas, then seal the air inlet, place the multi-layer protective box 5 into the sealing assembly 3, and finally cover it with the protective door 4. Seal the protective door 4 with the sealing assembly 3 with bolts to prevent the insulating gas from leaking out.

[0029] During installation, first insert the door 52 into the second slot 51. Then, through the restart hole on the top of the outer protective box 50, remove the air from the inner protective box 55 and introduce insulating gas into it. After sufficient insulating gas has been introduced, seal the inflation hole. With the action of the outer protective box 50, the inner protective box 55, and the second sealing strip 56, the insulating gas is difficult to leak. Insert the outer protective box 50 into the flange 30 inside the mounting plate 6 along the first slot 32. Then, put the chuck 33 on the surface of the flange 30 so that the outer wall of the chuck 33 contacts the outer wall of the door 52, pushing the door 52 closer to the outer protective box 50, making the sealing of the insulating gas by the door 52 stronger. Cover the protective door 4 on the protective frame 2. With the action of the first sealing strip 31, the leakage of insulating gas can be further prevented. Finally, fix the protective door 4, the chuck 33, and the flange 30 together with bolts to make the connection between the chuck 33 and the flange 30 tighter, completing the multi-layer sealing of the insulating gas.

[0030] When the external environment of the structure vibrates, the outer shell 1 vibrates first, and then extends to the sealing component 3 inside the protective frame 2, causing the sealing component 3 to vibrate as well. The vibration of the sealing component 3 will drive the multi-layer protective box 5 to vibrate, causing the outer protective box 50 to vibrate and transmitting the vibration to the inner protective box 55. Under the action of the second telescopic rod 53 and the second spring 54, the vibration of the inner protective box 55 is weakened, reducing the impact of vibration on the inner protective box 55, making it less likely for insulating gas to leak, and thus reducing the impact of vibration on the structure.

[0031] When the first sealing strip 31 inside the sealing assembly 3 ages or is damaged, a large gap will appear between the chuck 33 and the flange 30. At this time, the first spring 34 and the first telescopic rod 35 will contract and move the push plate 36 towards the chuck 33. The push plate 36 will apply pressure to the chuck 33, reducing the gap between the chuck 33 and the flange 30, making it difficult for insulating gas to leak through the gap between the chuck 33 and the flange 30.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multilayer sealing structure of a gas-insulated container for high-voltage switches, comprising: The outer shell (1) has a protective frame (2) fixedly connected to its outer wall, and a protective door (4) is snapped onto the outside of the protective frame (2). The outer shell (1) is characterized by further comprising: a mounting plate (6), a sealing assembly (3) fixedly connected to its inner wall, and a multi-layer protective box (5) slidably connected inside the sealing assembly (3). The sealing assembly (3) includes a flange (30), a first sealing strip (31) is fixedly connected to the outer wall of the flange (30), a first slot (32) is provided on the inner wall of the flange (30), a chuck (33) is slidably connected to the outer wall of the flange (30), a push plate (36) overlaps the outer wall of the chuck (33), a first telescopic rod (35) is fixedly connected to the side of the push plate (36) near the mounting plate (6), and a first spring (34) is sleeved on the outside of the first telescopic rod (35).

2. The multi-layer sealing structure of a gas-insulated container for high-voltage switches according to claim 1, characterized in that: The outer wall of the protective frame (2) is slidably connected to the inner wall of the protective door (4), the inner wall of the protective door (4) is fixedly connected to the inner wall of the chuck (33) by bolts, and the inner wall of the protective door (4) is fixedly connected to the inner wall of the flange (30) by bolts.

3. The multi-layer sealing structure of a gas-insulated container for high-voltage switches according to claim 1, characterized in that: The end of the first telescopic rod (35) away from the push plate (36) is fixedly connected to the mounting plate (6), one end of the first spring (34) is fixedly connected to the outer wall of the push plate (36), and the other end of the first spring (34) is fixedly connected to the mounting plate (6).

4. The multi-layer sealing structure of a gas-insulated container for high-voltage switches according to claim 1, characterized in that: The multi-layer protective box (5) includes an outer protective box (50). The outer protective box (50) has a second slot (51) on its outside. The inner wall of the second slot (51) is slidably connected to a box door (52). The inner wall of the outer protective box (50) is fixedly connected to a second telescopic rod (53). The outer side of the second telescopic rod (53) is fitted with a second spring (54). The end of the second telescopic rod (53) away from the inner wall of the outer protective box (50) is fixedly connected to an inner protective box (55). The inner protective box (55) and the outer protective box (50) are both fixedly connected to a second sealing strip (56) on the side near the box door (52).

5. The multi-layer sealing structure of a gas-insulating container for high-voltage switches according to claim 4, characterized in that: One end of the second spring (54) is fixedly connected to the inner wall of the outer protective box (50), and the other end of the second spring (54) is fixedly connected to the outer wall of the inner protective box (55).

6. The multi-layer sealing structure of a gas-insulating container for high-voltage switches according to claim 4, characterized in that: The inner wall of the chuck (33) near the flange (30) overlaps with the outer wall of the door (52).

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