A circuit breaker housing seal structure

Abstract

The utility model relates to circuit breaker shell sealing structure technical field, especially a circuit breaker shell sealing structure, including circuit breaker shell, the outer wall of circuit breaker shell is integrally formed with the bending plate, the top of bending plate is formed with the sealing groove that recesses downward, through the hollow sealing ring of top sealing plate down pressure makes it expand to both sides and extrude inside and outside two sealing plates, form both sides waterproof of the both sides of hollow sealing ring, the sealing is better, and through two groups of water stop convex ring respectively in the both sides of hollow sealing ring form upper and lower multilayer waterproof structure, each side all through a group of water stop convex ring that sets up to carry out multiple waterproof of upper and lower, further improve the sealing, simultaneously through the clamping of U's backing plate cooperation pressure plate to the top sealing plate and bending plate of sealing groove both sides, effectively prevent due to the internal gas thermal expansion and make top sealing half upper convex make the inside separation of top sealing plate and bending plate, guarantee the sealing.

Description

Technical Field

[0001] This utility model relates to the technical field of circuit breaker housing sealing structure, and in particular to a circuit breaker housing sealing structure. Background Technology

[0002] Many common-enclosure outdoor high-voltage AC circuit breakers use SF6 gas filling, which serves both as insulation and effective protection for the operating mechanism. However, SF6 is a greenhouse gas and will be banned in several decades according to the Kyoto Protocol. While pole-mounted outdoor high-voltage AC circuit breakers have a reasonable structure, reliable insulation, and low production cost, their protection rating has remained at IP65. Even if some manufacturers claim to achieve IP67, the actual performance is unsatisfactory, with condensation causing corrosion of critical components in the operating mechanism.

[0003] A welding-free sealing structure, with publication number CN208015221U, belongs to the technical field of circuit breaker housing sealing structures. It includes a circuit breaker housing, a sealing ring, and a top sealing plate. The upper inner edge of the circuit breaker housing has a U-shaped sealing groove, within which the sealing ring is embedded. A top sealing plate is located at the upper end of the circuit breaker housing, connected to the housing via multiple clamping components, which press the sealing ring into the sealing groove. The sealing ring has a sealing groove at its center facing the sealing groove end face. The sealing groove and the circuit breaker housing are integrally formed. The folded edge of the sealing plate improves the sealing performance between the top sealing plate and the sealing ring.

[0004] The aforementioned existing technology uses the same sheet metal for both the sealing groove and the circuit breaker housing, which improves the overall structural strength and sealing performance, and the manufacturing process is also relatively convenient. However, in use, only one side of the gap between the sealing groove and the sealing plate fold can be waterproofed using a single sealing ring, resulting in insufficient sealing performance. Utility Model Content

[0005] The purpose of this utility model is to solve the shortcomings of the existing technology, such as one-sided waterproofing and insufficient sealing, and to propose a circuit breaker housing sealing structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a circuit breaker housing sealing structure, including a circuit breaker housing, wherein the outer wall of the circuit breaker housing is integrally formed with a bending plate, the top of the bending plate is formed with a downwardly recessed sealing groove, and a hollow sealing ring is installed at the bottom of the sealing groove through a positioning component.

[0008] The top of the bent plate is fixedly connected to a top sealing plate by a connecting assembly. The bottom of the top sealing plate is integrally formed with two layers of sealing plates inserted into the sealing groove. A hollow sealing ring is installed between the two layers of sealing plates and is sandwiched between the bottom of the sealing groove and the bottom surface of the top sealing plate.

[0009] Furthermore, the connecting assembly includes two sets of pressure plates disposed on both sides of the top of the top sealing plate. The top of the pressure plate is provided with an insertion hole, and a screw is inserted into the insertion hole. The lower end of the screw passes through the top sealing plate and the bending plate and is threadedly connected to a support plate. The top of the support plate abuts against the bending plate. The top of the support plate is provided with a U-shaped groove, and the bottom end of the sealing groove is inserted into the U-shaped groove.

[0010] Furthermore, the top of the top sealing plate is provided with a second positioning hole, and the bottom of the pressure plate is integrally formed with a positioning post, the lower end of which is inserted into the second positioning hole.

[0011] Furthermore, the positioning component includes a plurality of equidistant protrusions integrally formed on the bottom of the sealing groove, and a plurality of positioning holes are equidistantly opened on the bottom of the hollow sealing ring, with the upper ends of the plurality of protrusions respectively inserted into the plurality of positioning holes.

[0012] Furthermore, a set of water-stopping protrusions is integrally formed on both the inner and outer walls of the hollow sealing ring. Each set of water-stopping protrusions is equidistant in the vertical direction. The side of the water-stopping protrusion away from the hollow sealing ring abuts against the sealing plate. The cross-section of the hollow sealing ring is annular.

[0013] Furthermore, the top and bottom of the top sealing plate are integrally formed with a plurality of annular protrusions, and the plurality of annular protrusions are equidistant from the inside to the outside, and the plurality of annular protrusions on the top of the top sealing plate and the plurality of annular protrusions on the bottom of the top sealing plate are staggered.

[0014] The circuit breaker housing sealing structure proposed in this utility model has the following advantages: by pressing down the hollow sealing ring with the top sealing plate, it expands to both sides and squeezes the inner and outer sealing plates, forming double-sided waterproofing on both sides of the hollow sealing ring, resulting in better sealing performance. Furthermore, by using two sets of water-stopping protrusions to form a multi-layered waterproof structure on both sides of the hollow sealing ring, with each side using a set of upper and lower water-stopping protrusions for multiple waterproofing, further improving the sealing performance. At the same time, the U-shaped support plate and the pressure plate clamp the top sealing plate and the bending plate on both sides of the sealing groove, effectively preventing the top sealing plate from bulging upwards due to the expansion of internal gas due to heat, thus separating the inner side of the top sealing plate from the bending plate and ensuring sealing performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2This is an enlarged view of area A of this utility model;

[0017] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 4 This is an enlarged view of area B of this utility model.

[0019] In the diagram: 1. Circuit breaker housing; 2. Bending plate; 3. Sealing groove; 4. Positioning assembly; 41. Protruding button; 42. Positioning hole; 5. Hollow sealing ring; 51. Water-stopping protruding ring; 6. Connecting assembly; 61. Pressure plate; 62. Insertion hole; 63. Screw; 64. Support plate; 65. U-shaped groove; 66. Positioning hole two; 67. Positioning post; 7. Top sealing plate; 71. Annular protrusion; 8. Sealing plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-4 As an embodiment of this utility model, a circuit breaker housing sealing structure is disclosed, including a circuit breaker housing 1. The outer wall of the circuit breaker housing 1 is integrally formed with a bending plate 2. The top of the bending plate 2 is formed with a downwardly recessed sealing groove 3. A hollow sealing ring 5 is installed at the bottom of the sealing groove 3 through a positioning component 4.

[0022] The top of the bent plate 2 is fixedly connected to the top sealing plate 7 by the connecting component 6. The bottom of the top sealing plate 7 is integrally formed with two layers of sealing plates 8 inserted into the sealing groove 3. A hollow sealing ring 5 is installed between the two layers of sealing plates 8. The hollow sealing ring 5 is sandwiched between the bottom of the sealing groove 3 and the bottom surface of the top sealing plate 7.

[0023] While the top sealing plate 7 presses down on the hollow sealing ring 5, it causes the two sealing plates to insert into the sealing groove 3, so that the hollow sealing ring 5 deforms under pressure and expands to squeeze the inner and outer sealing plates 8, forming a double seal with the two sealing plates 8.

[0024] Furthermore, the fastening connection assembly 6 includes two sets of pressure plates 61 disposed on both sides of the top of the top sealing plate 7. The top of the pressure plate 61 is provided with an insertion hole 62, and a screw 63 is inserted into the insertion hole 62. The lower end of the screw 63 passes through the top sealing plate 7 and the bending plate 2 and is threadedly connected to a support plate 64. The top of the support plate 64 abuts against the bending plate 2. The top of the support plate 64 is provided with a U-shaped groove 65, and the bottom end of the sealing groove 3 is inserted into the U-shaped groove 65.

[0025] By tightening screw 63, pressure plate 61 and support plate 64 are brought close together and clamped to bending plate 2 and top sealing plate 7. By embedding sealing groove 3 into U-shaped groove 65, support plate 64 prevents the bottom and inner and outer sides of sealing groove 3 from being compressed and deformed outward, affecting sealing performance. At the same time, after opening sealing groove 3, the top of U-shaped support plate 64 cooperates with pressure plate 61 to clamp and fix the inner and outer sides of bending plate 2, thus making it more stable. At the same time, it prevents the gas inside the circuit breaker housing from expanding due to heating, thereby pushing the top sealing plate 7 upward, causing the top sealing plate 7 to bulge and separate from bending plate 2. This affects the downward pressure on hollow sealing ring 5 and causes sealing plate 8 to move within sealing groove 3, affecting sealing performance.

[0026] For example, the top of the top sealing plate 7 is provided with a positioning hole 66, and the bottom of the pressure plate 61 is integrally formed with a positioning post 67. The lower end of the positioning post 67 is inserted into the positioning hole 66, and the positioning post 67 cooperates with the positioning hole 66 to prevent the pressure plate 61 from rotating.

[0027] It should be noted that the positioning component 4 includes a plurality of equidistant protrusions 41 integrally formed and disposed at the bottom of the sealing groove 3, and a plurality of positioning holes 42 are equidistantly opened at the bottom of the hollow sealing ring 5, and the upper ends of the plurality of protrusions 41 are respectively inserted into the plurality of positioning holes 42.

[0028] When installing the hollow sealing ring 5 into the sealing groove 3, the hollow sealing ring 5 is positioned by inserting the upper ends of several protruding buttons 41 into several positioning holes 42 respectively, so as to prevent it from wobbling and deforming, prevent the hollow sealing ring 5 from blocking the insertion of the two sealing plates 8, and ensure that when the two sealing plates 8 are inserted into the sealing groove 3, the hollow sealing ring 5 is centered between the two sealing plates 8.

[0029] In some embodiments, a set of water-stopping protrusions 51 are integrally formed on both the inner and outer walls of the hollow sealing ring 5. Each set of water-stopping protrusions 51 is equidistant in the vertical direction. The side of the water-stopping protrusion 51 away from the hollow sealing ring 5 abuts against the sealing plate 8. The cross-section of the hollow sealing ring 5 is annular.

[0030] When the hollow sealing ring 5 expands to both sides and squeezes the inner and outer sealing plates 8, it brings the two sets of water-stopping protrusions 51 on the inner and outer sides closer to and squeezes the inner and outer sealing plates 8 respectively. Thus, the two sets of water-stopping protrusions 51 form a multi-layered waterproof structure on both sides of the hollow sealing ring 5, and waterproofing is performed on both sides of the hollow sealing ring 5. Each side is waterproofed multiple times through a set of water-stopping protrusions 51 set up on both sides.

[0031] Specifically, the top and bottom of the top sealing plate 7 are integrally formed with a plurality of annular protrusions 71, and the plurality of annular protrusions 71 are equidistant from the inside to the outside. The plurality of annular protrusions 71 on the top of the top sealing plate 7 and the plurality of annular protrusions 71 on the bottom of the top sealing plate 7 are staggered.

[0032] By setting an annular protrusion 71 at the bottom of the top sealing plate 7, the contact area between the top sealing plate 7 and the internal air is increased, thereby improving the heat absorption efficiency. By setting an annular protrusion 71 at the top of the top sealing plate 7, the contact area between the top sealing plate 7 and the external air is increased, thereby increasing the heat dissipation speed.

[0033] Working method: The hollow sealing ring 5 is placed into the sealing groove 3, and several protruding buttons 41 on the bottom of the sealing groove 3 are inserted into the positioning holes 42 at the bottom of the hollow sealing ring 5.

[0034] The top sealing plate 7 is placed on top of the circuit breaker housing 1, so that the inner and outer sealing plates 8 are inserted into the sealing groove 3 and the two sealing grooves 3 are located on the inner and outer sides of the hollow sealing ring 5. At the same time, the bottom of the descending top sealing plate 7 presses down on the hollow sealing ring 5, so that the air in the cavity inside the hollow sealing ring 5 flows to both sides and causes the hollow sealing ring 5 to expand to both sides and squeeze the inner and outer sealing plates 8, thereby forming double-sided waterproofing on both sides of the hollow sealing ring 5.

[0035] At the same time, the two sets of water-stopping protrusions 51 on the inner and outer sides are brought closer together and squeezed against the inner and outer sealing plates 8, thereby forming a multi-layered waterproof structure on both sides of the hollow sealing ring 5 through the two sets of water-stopping protrusions 51. Waterproofing is carried out on both sides of the hollow sealing ring 5, and each side is waterproofed through a set of water-stopping protrusions 51 arranged vertically, effectively preventing water from passing through the sealing groove 3.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A circuit breaker housing sealing structure, comprising a circuit breaker housing (1), characterized in that: The outer wall of the circuit breaker housing (1) is integrally formed with a bending plate (2), and the top of the bending plate (2) is formed with a downwardly recessed sealing groove (3). A hollow sealing ring (5) is installed at the bottom of the sealing groove (3) through a positioning component (4). The top of the bent plate (2) is fixedly connected to a top sealing plate (7) by a connecting component (6). The bottom of the top sealing plate (7) is integrally formed with two layers of sealing plates (8) inserted into the sealing groove (3). A hollow sealing ring (5) is installed between the two layers of sealing plates (8). The hollow sealing ring (5) is sandwiched between the bottom of the sealing groove (3) and the bottom surface of the top sealing plate (7).

2. The circuit breaker housing sealing structure according to claim 1, characterized in that: The connecting assembly (6) includes two sets of pressure plates (61) disposed on both sides of the top of the top sealing plate (7). The top of the pressure plate (61) is provided with a socket (62), and a screw (63) is inserted into the socket (62). The lower end of the screw (63) passes through the top sealing plate (7) and the bending plate (2) and is threadedly connected to a support plate (64). The top of the support plate (64) abuts against the bending plate (2). The top of the support plate (64) is provided with a U-shaped groove (65), and the bottom end of the sealing groove (3) is inserted into the U-shaped groove (65).

3. The circuit breaker housing sealing structure according to claim 2, characterized in that: The top of the top sealing plate (7) is provided with a positioning hole 2 (66), and the bottom of the pressure plate (61) is integrally formed with a positioning post (67), the lower end of the positioning post (67) is inserted into the positioning hole 2 (66).

4. The circuit breaker housing sealing structure according to claim 1, characterized in that: The positioning component (4) includes several equidistant protrusions (41) integrally formed and disposed at the bottom of the sealing groove (3), and several positioning holes (42) are equidistantly opened at the bottom of the hollow sealing ring (5), and the upper ends of the several protrusions (41) are respectively inserted into the several positioning holes (42).

5. The circuit breaker housing sealing structure according to claim 1, characterized in that: The hollow sealing ring (5) has a set of water-stopping protrusions (51) integrally formed on both the inner and outer walls. Each set of water-stopping protrusions (51) is equidistant in the vertical direction. The side of the water-stopping protrusion (51) away from the hollow sealing ring (5) abuts against the sealing plate (8). The cross-section of the hollow sealing ring (5) is annular.

6. The circuit breaker housing sealing structure according to claim 1, characterized in that: The top and bottom of the top sealing plate (7) are integrally formed with a number of annular protrusions (71), and the number of annular protrusions (71) are equidistant from the inside to the outside. The number of annular protrusions (71) on the top of the top sealing plate (7) and the number of annular protrusions (71) on the bottom of the top sealing plate (7) are staggered.

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