Pole-mounted circuit breaker shell and pole-mounted circuit breaker

Abstract

The invention relates to the technical field of shells of high-voltage switch devices, in particular to a pole-mounted circuit breaker shell and a pole-mounted circuit breaker. The pole-mounted circuit breaker comprises a pole-mounted circuit breaker shell, the pole-mounted circuit breaker shell comprises an integrated cylindrical shell formed by water pressure expansion, the cylindrical shell comprises a main body section and a diameter expansion section located at one end of the main body section, and a mounting end face is machined on the end face of the diameter expansion section and used for mounting an operating mechanism. An inner cavity of the expanding section forms an operating mechanism installation cavity used for installing an operating mechanism, and an inner cavity of the main body section forms a circuit breaker installation cavity used for installing a three-phase circuit breaker. The water pressure expansion type integral forming technology is simple in process and high in efficiency, the integrally-formed cylindrical shell is good in sealing performance, and the problem that the safe and stable operation of the circuit breaker is affected due to the fact that the circuit breaker shell leaks insulating gas due to welding defects possibly existing in an existing pole-mounted circuit breaker shell is solved.

Description

Technical Field

[0001] The invention relates to the technical field of housings of high-voltage switch devices, and in particular to a pole-mounted circuit breaker housing and a pole-mounted circuit breaker. Background Art

[0002] A pole-mounted circuit breaker is a switchgear installed on a power pole in a power transmission and distribution network, used to cut off and protect the circuit. The housing of the pole-mounted circuit breaker, as the main structural part of the pole-mounted circuit breaker, bears the weight of all internal components and plays a supporting and protective role. The existing circuit breaker housing is usually formed into a cylindrical structure by bending sheet metal and then welding. The welding process has many welds and the quality of the welds varies. If welding defects such as incomplete penetration, pores, and cracks occur, the sealing of the housing will be affected. For circuit breakers filled with insulating gas, poor sealing will cause leakage of insulating gas in the circuit breaker, thereby reducing the insulation performance inside the circuit breaker and causing partial discharge of the outgoing line, affecting the safe and stable operation of the circuit breaker and the entire power system. Summary of the invention

[0003] The object of the present invention is to provide a pole-mounted circuit breaker housing to solve the problem that the existing pole-mounted circuit breaker housing obtained by welding may leak insulating gas due to welding defects, thereby affecting the safe and stable operation of the circuit breaker.

[0004] The object of the present invention is to provide a pole-mounted circuit breaker to solve the problem that the existing pole-mounted circuit breaker housing obtained by welding may leak insulating gas due to welding defects, thereby affecting the safe and stable operation of the circuit breaker.

[0005] In order to achieve the above object, the housing of the pole-mounted circuit breaker of the present invention adopts the following technical solutions: A column mounted circuit breaker housing comprises an integrated cylindrical housing formed by water pressure expansion, the cylindrical housing comprises a main body section and an expanded diameter section at one end of the main body section, the end face of the expanded diameter section is processed with an installation end face for installing an operating mechanism, the inner cavity of the expanded diameter section forms an operating mechanism installation cavity for the operating mechanism, and the inner cavity of the main body section forms a circuit breaker installation cavity for installing a three-phase circuit breaker.

[0006] Furthermore, the main body section and the expanded diameter section are both square cylinder sections, and the square cylinder section is provided with a transition fillet structure between two adjacent cylinder side walls.

[0007] Furthermore, a circular reduced diameter section is formed at the other end of the main section opposite to the expanded diameter section, and the circular reduced diameter section and the main section are connected by a smooth curved surface transition. The end of the circular reduced diameter section is connected to a rear sealing plate, and a bursting piece is installed on the rear sealing plate.

[0008] Furthermore, a sleeve positioning hole and a sleeve mounting hole are provided on the left and right opposite side walls of the main body section, and the sleeve positioning hole is located on the upper side of the sleeve mounting hole.

[0009] Furthermore, the sleeve positioning hole and the sleeve mounting hole are both arranged bilaterally symmetrically.

[0010] Furthermore, a reinforcing convex hump is provided on the main body section.

[0011] Furthermore, the reinforcing convex bulges include I-shaped convex bulges arranged on the upper and lower side surfaces of the main section and I-shaped convex bulges arranged at the transition fillet structure.

[0012] Furthermore, the pole-mounted circuit breaker housing also includes a hanging seat arranged on the top of the cylindrical shell for hanging installation of the pole-mounted circuit breaker and a mounting base arranged on the bottom of the cylindrical shell for seat installation of the pole-mounted circuit breaker.

[0013] Beneficial effects: The pole-mounted circuit breaker housing of the present invention is a pioneering invention. Specifically, the pole-mounted circuit breaker housing includes an integrated cylindrical housing formed by a hydraulic expansion technology. The hydraulic expansion integrated molding technology is simple in process, which makes the production efficiency of the housing higher; the cylindrical housing includes a main body section and an expanded diameter section at one end of the main body section for accommodating an operating mechanism. The main body section and the expanded diameter section are integrally formed into a complete cylindrical structure, which avoids the processing defects caused by welding of the main body section and the expanded diameter section in the prior art, makes the pole-mounted circuit breaker housing more sealed, and solves the problem that the existing pole-mounted circuit breaker housing may have leakage of insulating gas due to welding defects, thereby affecting the safe and stable operation of the circuit breaker.

[0014] To achieve the above object, the pole mounted circuit breaker of the present invention adopts the following technical solutions: A pole-mounted circuit breaker includes a pole-mounted circuit breaker housing, wherein the pole-mounted circuit breaker housing includes an integrated cylindrical housing formed by water pressure expansion, wherein the cylindrical housing includes a main body section and an expanded diameter section at one end of the main body section, wherein an end surface of the expanded diameter section is processed with an installation end surface for installing an operating mechanism, an inner cavity of the expanded diameter section forms an operating mechanism installation cavity for installing the operating mechanism, and an inner cavity of the main body section forms a circuit breaker installation cavity for installing a three-phase circuit breaker.

[0015] Furthermore, the main body section and the expanded diameter section are both square cylinder sections, and the square cylinder section is provided with a transition fillet structure between two adjacent cylinder side walls.

[0016] Furthermore, a circular reduced diameter section is formed at the other end of the main section opposite to the expanded diameter section, and the circular reduced diameter section and the main section are connected by a smooth curved surface transition. The end of the circular reduced diameter section is connected to a rear sealing plate, and a bursting piece is installed on the rear sealing plate.

[0017] Furthermore, a sleeve positioning hole and a sleeve mounting hole are provided on the left and right opposite side walls of the main body section, and the sleeve positioning hole is located on the upper side of the sleeve mounting hole.

[0018] Furthermore, the sleeve positioning hole and the sleeve mounting hole are both arranged bilaterally symmetrically.

[0019] Furthermore, a reinforcing convex hump is provided on the main body section.

[0020] Furthermore, the reinforcing convex bulges include I-shaped convex bulges arranged on the upper and lower side surfaces of the main section and I-shaped convex bulges arranged at the transition fillet structure.

[0021] Furthermore, the pole-mounted circuit breaker housing also includes a hanging seat arranged on the top of the cylindrical shell for hanging installation of the pole-mounted circuit breaker and a mounting base arranged on the bottom of the cylindrical shell for seat installation of the pole-mounted circuit breaker.

[0022] Beneficial effects: The pole-mounted circuit breaker of the present invention is a pioneering invention. Specifically, the pole-mounted circuit breaker housing of the pole-mounted circuit breaker includes an integrated cylindrical housing formed by a hydraulic expansion technology. The hydraulic expansion integrated molding technology is simple in process, so that the production efficiency of the housing is higher; the cylindrical housing includes a main body section and an expanded diameter section at one end of the main body section for accommodating an operating mechanism. The main body section and the expanded diameter section are integrally formed into a complete cylindrical structure, avoiding the processing defects caused by welding the main body section and the expanded diameter section in the prior art, making the pole-mounted circuit breaker housing more sealed, and solving the problem that the existing pole-mounted circuit breaker housing may have leakage of insulating gas due to welding defects, thereby affecting the safe and stable operation of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of a pole mounted circuit breaker housing of the present invention; Figure 2 for Figure 1 Schematic diagram of another view of the circuit breaker housing on the center column.

[0024] In the figure: 1. hanging seat; 11. lifting vertical plate; 111. reinforcement plate; 2. casing fixing bolt; 3. diameter expansion section; 31. installation end face; 4. cylindrical shell; 41. transition fillet structure; 42. transition reinforcement convex hump; 43. main body section; 5. casing installation hole; 6. rear sealing plate; 8. installation base; 81. bottom installation plate; 82. support plate; 9. lifting ring; 10. casing positioning hole; 11. reinforcement convex hump; 12. circular necking section. DETAILED DESCRIPTION

[0025] The present invention processes the main part of the column mounted circuit breaker housing through the hydraulic expansion integral molding technology. The hydraulic expansion technology can form a single integral component through one-time processing of the main part of the circuit breaker housing, thereby avoiding the problem that processing defects caused by multiple welding affect the overall sealing of the circuit breaker housing.

[0026] Based on the above concept, as a basic embodiment, the pole-mounted circuit breaker housing of the present invention includes an integrated cylindrical housing 4 formed by water pressure expansion, and the cylindrical housing 4 includes a main body section 43 and an expanded diameter section 3 at one end of the main body section 43, and the end face of the expanded diameter section 3 is processed with a mounting end face 31 for installing an operating mechanism, the inner cavity of the expanded diameter section 43 forms an operating mechanism mounting cavity for installing the operating mechanism, and the inner cavity of the main body section 43 forms a circuit breaker mounting cavity for installing a three-phase circuit breaker.

[0027] The process of hydraulic bulging of the shell is as follows: the round cylinder is placed into the mold of the bulging machine, and high-pressure water is injected into the cylinder after the mold is closed. At the same time, axial thrust is applied to both ends of the cylinder. The axial thrust helps to compensate the material when the cylinder expands and deforms. Under the action of high-pressure water, the cylinder is close to the inner wall of the mold to complete the bulging process. Plastic deformation occurs during the bulging process, and the material undergoes plastic deformation, which enhances the rigidity and strength of the material.

[0028] like Figure 1-2 As shown, in order to make the cylindrical shell 4 stronger, a reinforcing bulge 11 is provided on the cylindrical shell 4. The reinforcing bulge 11 includes an I-shaped bulge arranged on the upper and lower sides of the main section 43. The I-shaped structure is more regular and easier to be formed as one piece. In other embodiments, it can also be designed into an arc-shaped or other different structure bulge structure according to specific strength requirements.

[0029] The cylindrical shell 4 can be a circular cylindrical structure. In a preferred embodiment, the cylindrical shell 4 is designed to be square, and the internal installation space of the square cylinder is more spacious. In order to avoid stress deformation of the square cylindrical shell 4 at its edges and corners and to further increase the internal space of the cylindrical structure 4, preferably, a transition fillet structure 41 is set between adjacent cylinder surfaces of the cylindrical structure 4. During the hydraulic expansion process, when the circular cylinder blank is processed into a square cylinder, the fillet structure 41 is easier to process, which simplifies the processing procedure. The reinforcing convex 11 also includes a straight-line transition reinforcing convex 42 located at the transition fillet structure 41. The transition reinforcing convex 42 is set at the transition fillet structure 41, which improves the structural strength at the transition fillet position and prevents the shell from deforming.

[0030] The housing of the pole-mounted circuit breaker also includes a rear sealing plate 6 welded to one end of the cylindrical housing 4. An explosion-proof unit is designed in the rear sealing plate 6. When the internal pressure of the housing exceeds the set pressure, the bursting disc explodes effectively, and the pressure in the box is released to ensure the safety of equipment, lines and personnel.

[0031] The end of the cylindrical shell 4 at the other end facing away from the main section 43 and the expanded diameter section 3 can be an extension of the shell wall with a uniform cross-section outward, and the rear sealing plate 6 is directly assembled on the end of the cylindrical shell 4. However, in order to ensure the strength of the assembly end of the cylindrical shell 4, preferably, the end of the other end is integrally formed as a circular necking section 12, and the circular reduced diameter section 12 is smoothly transitionally connected to the main section 43, and the end of the circular reduced diameter section 12 is connected to the rear sealing plate 6.

[0032] The shape and size of the end of the circular reduced diameter section 12 should correspond to the rear sealing plate 6. The circular reduced diameter section 12 can make the expansion degree of the other end facing away from the main body section 43 and the expanded diameter section 3 smaller during the hydraulic forming process, so that the rear sealing plate 6 can ensure good structural strength during assembly. In addition, compared with the square structure of the cylindrical shell 4 itself, the end of the circular reduced diameter section 12 can make the weld shorter, so that the sealing of the pole-mounted circuit breaker is better.

[0033] Sleeve mounting holes 5 are respectively provided on the shell walls on the left and right sides of the main body section 43, and sleeve positioning holes 10 are provided on the upper sides of the sleeve mounting holes 5. The sleeve positioning holes 10 and the sleeve mounting holes 5 are symmetrically arranged. The sleeve positioning holes 10 are mainly used for the installation and positioning of the incoming and outgoing line sleeves to ensure accurate positioning of the sleeves and prevent errors in the installation process. The sleeve mounting holes 5 are used to install the incoming and outgoing line sleeves and their apertures are determined according to the corresponding installation position size of the sleeves. Sleeve fixing bolts 2 are provided along the circumferential position of the sleeve mounting holes 5.

[0034] The housing of the pole-mounted circuit breaker also includes a lifting ring 9 arranged at the top of the expanded diameter section 3, a hanging seat 1 arranged at the top of the main section 43, and a mounting base 8 arranged at the bottom of the main section 43. When the pole-mounted short-circuit breaker is hoisted, the lifting ring 9 is used to cooperate with the hook of the hanging device to transport the pole-mounted circuit breaker to the installation position. The hanging seat 1 is mainly used for hanging installation of the pole-mounted circuit breaker. The hanging seat 1 is bent from a plate and includes a hanging vertical plate 11 arranged perpendicular to the top wall of the cylindrical housing 4 and a reinforcing side plate 111 bent along the hanging vertical plate 11 in a direction perpendicular to both sides of the hanging vertical plate. The hanging vertical plate 11 is provided with a mounting hole.

[0035] The mounting base 8 is mainly used for the seat-type installation of the pole-mounted circuit breaker. The mounting base 8 can be obtained by welding plates, and includes a bottom mounting plate 81 and a support plate 82 welded on the bottom mounting plate. The bottom mounting plate 81 and the support plate 82 are both long strip plates. The support plates 82 are arranged at both ends of the long strip plates and the support plates 82 at both ends are inclined from outside to inside. One end of the support plate 82 is welded and fixed to the mounting base plate 81, and the other end is fixed to the bottom of the pole-mounted circuit breaker housing. Mounting holes are also provided at both ends of the bottom mounting plate 81, and the mounting holes are located on the outside of the support plate 82.

[0036] The present invention also provides a pole-mounted circuit breaker, which includes a pole-mounted circuit breaker housing, a three-phase circuit breaker, a circuit breaker operating mechanism, an incoming line bushing and an outgoing line bushing. The technical solution of the pole-mounted circuit breaker housing has been described above and will not be repeated here.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A pole mounted circuit breaker housing, characterized in that: It comprises an integral cylindrical shell formed by water pressure expansion, the cylindrical shell comprises a main body section and an expanded diameter section at one end of the main body section, the end face of the expanded diameter section is processed with a mounting end face for mounting an operating mechanism, the inner cavity of the expanded diameter section forms an operating mechanism mounting cavity for accommodating the operating mechanism, and the inner cavity of the main body section forms a circuit breaker mounting cavity for mounting a three-phase circuit breaker.

2. The pole mounted circuit breaker housing according to claim 1, characterized in that: The main body section and the expanded diameter section are both square cylinder sections, and the square cylinder section is provided with a transition fillet structure between two adjacent cylinder side walls.

3. The pole mounted circuit breaker housing according to claim 2, characterized in that: A circular reduced diameter section is formed at the other end of the main section opposite to the expanded diameter section. The circular reduced diameter section and the main section are connected by a smooth curved surface transition. The end of the circular reduced diameter section is connected to a rear sealing plate, on which a bursting disc is installed.

4. The pole mounted circuit breaker housing according to claim 2, characterized in that: The left and right opposite side walls of the main body section are both provided with a sleeve positioning hole and a sleeve mounting hole, and the sleeve positioning hole is located on the upper side of the sleeve mounting hole.

5. The pole mounted circuit breaker housing according to claim 4, characterized in that: The sleeve positioning hole and the sleeve installation hole are both arranged symmetrically on both sides.

6. The pole mounted circuit breaker housing according to any one of claims 2 to 5, characterized in that: The main body section is provided with a reinforcement convex bump.

7. The pole mounted circuit breaker housing according to claim 6, characterized in that: The reinforcing convex bulges include an I-shaped convex bulge arranged on the upper and lower side surfaces of the main section and a straight-shaped convex bulge arranged at the transition fillet structure.

8. The pole mounted circuit breaker housing according to claim 7, characterized in that: The pole-mounted circuit breaker housing also includes a hanging seat arranged on the top of the cylindrical shell for hanging installation of the pole-mounted circuit breaker and a mounting base arranged on the bottom of the cylindrical shell for seat installation of the pole-mounted circuit breaker.

9. A pole mounted circuit breaker, comprising a pole mounted circuit breaker housing, characterized in that: The pole-mounted circuit breaker housing is the pole-mounted circuit breaker housing according to any one of claims 1 to 8.

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