Tail end supporting structure for arc extinguish chamber and tail end supporting insulation assembly for arc extinguish chamber

Abstract

The invention provides a tail end supporting structure for an arc extinguish chamber and a tail end supporting insulation assembly for the arc extinguish chamber, and belongs to the field of high-voltage circuit breakers. The tail end supporting structure for the arc extinguish chamber comprises a first wire outlet seat and the tail end supporting insulation assembly for the arc extinguish chamber, the tail end supporting insulation assembly for the arc extinguish chamber comprises an insulation cylinder made of insulation materials, and one end of the insulation cylinder is provided with an upper flange; the other end of the insulating cylinder is provided with a lower flange, and the upper flange and the lower flange are made of good conductive materials. The lower flange is provided with a mounting flange through a fastener, the edge of the mounting flange is provided with a fixing hole and a positioning hole, and the mounting flange is connected with the tail end of the arc extinguish chamber through the fastener penetrating through the fixing hole and a positioning piece of the positioning hole; a contact seat is installed on the outer wall of the first wire outlet seat, an installation groove is formed in the side, used for facing the tail end supporting insulation assembly for the arc extinguish chamber, of the first wire outlet seat, and an elastic piece and a guide ring are arranged between the installation groove and the flanging installation part. The arc extinguishing chamber has the beneficial effect that the defects caused by flexible deformation of the arc extinguishing chamber can be overcome.

Description

Technical Field

[0001] This invention belongs to the field of high-voltage circuit breakers, specifically relating to an end support structure for an arc-extinguishing chamber and an end support insulation component for an arc-extinguishing chamber. Background Technology

[0002] With the rapid development of the social economy, the electricity consumption has experienced explosive growth, and at the same time, the requirements for power supply reliability have become increasingly stringent.

[0003] Against this backdrop, power grid transmission voltages are rapidly advancing towards ultra-high voltage and extra-high voltage. High-voltage circuit breakers, as core equipment in power transmission and distribution systems, play a crucial role in control and protection within the power grid. Moreover, with the continuous increase in grid voltage levels and short-circuit currents, traditional single-break circuit breakers are gradually failing to meet the demands in terms of breaking capacity and insulation strength, struggling to cope with increasingly severe technical challenges. To meet the urgent needs of modern power systems for high-voltage, high-current breaking, the large-capacity, multi-break design of high-voltage circuit breakers has emerged, becoming one of the core technologies for solving this problem. Multi-break technology significantly improves arc extinguishing efficiency and voltage withstand capability by evenly distributing arc energy to multiple series-connected breaks. Its modular break design greatly facilitates equipment maintenance and capacity expansion, fully embodying the unity of high reliability, flexibility, and technical economy.

[0004] However, a common arc-extinguishing chamber structure consists of multiple breaks connected in series, supported by a single insulating platform, with plug-in terminals for the outgoing wires. For example... Figure 1 As shown, the following problems exist in practical applications: 1. Under static conditions, the fracture structure at the end of the arc-extinguishing chamber will undergo significant flexible deformation due to gravity, which will have a significant impact on the overall electric field of the arc-extinguishing chamber. 2. During the mechanical life test, the superimposed flexible deformation of the arc-extinguishing chamber during the opening and closing actions has a significant impact on the overall life of the arc-extinguishing chamber and the opening and closing speed. 3. During transportation, the combined effects of vibration and flexural deformation have a significant impact on the overall lifespan of the arc-extinguishing chamber; 4. In actual operation, the combined effects of thermal expansion and contraction and flexible deformation in the arc-extinguishing chamber will affect the flow. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems existing in the practical application of existing arc-extinguishing chamber structures by providing an end support structure and an end support insulation assembly for arc-extinguishing chambers, thereby resolving a series of performance defects caused by the flexible deformation of arc-extinguishing chambers.

[0006] To achieve the above objectives, the first technical solution provided by the present invention is: an end support structure for an arc-extinguishing chamber, comprising a lead-out socket and an end support insulation assembly for the arc-extinguishing chamber. The end support insulation assembly for the arc-extinguishing chamber includes an insulating cylinder made of insulating material. The insulating cylinder is a cylindrical structure open at both ends. An upper flange is installed at one end of the insulating cylinder, and a lower flange is installed at the other end of the insulating cylinder. The upper and lower flanges are made of a good conductive material. A first through hole is penetrating the middle of the upper flange, and a flanged mounting part is folded outward from the first through hole in the direction away from the insulating cylinder. The outer side of the flanged mounting part is fitted with a guide ring and an elastic element; a second through hole runs through the middle of the lower flange, and a mounting flange is installed on the lower flange through fasteners. The edge of the mounting flange is provided with fixing holes and positioning holes. The mounting flange is connected to the end of the arc-extinguishing chamber through fasteners passing through the fixing holes and positioning elements through the positioning holes; a contact seat is installed on the outer wall of the outlet seat one. An installation groove is provided on the side of the outlet seat one that faces the end support insulation component of the arc-extinguishing chamber. The installation groove is fitted on the outer side of the flanged mounting part, and the elastic element and guide ring are located between the groove wall of the installation groove and the flanged mounting part. In this way, components such as the contact seat located at the end of the arc-extinguishing chamber can be supported by the end support insulation component of the arc-extinguishing chamber to avoid large flexural deformation, thereby avoiding the various problems caused by flexural deformation. At the same time, the guide ring can play a role in radial guidance and vibration absorption (utilizing the properties of the plastic material itself), and the elastic element can ensure a tight contact between the upper flange and the outlet seat, so as to reduce contact resistance, reduce the potential difference at the contact point, and avoid local potential concentration.

[0007] Furthermore, the guide ring is made of plastic.

[0008] Furthermore, a mounting stop is provided on the side of the mounting flange facing the end support insulation assembly for the arc-extinguishing chamber, and the end support insulation assembly for the arc-extinguishing chamber can be positioned through the mounting stop.

[0009] The second technical solution provided by this invention is: an insulating assembly for the end support structure of the arc-extinguishing chamber, comprising an insulating cylinder made of insulating material, the insulating cylinder being a cylindrical structure open at both ends, an upper flange installed at one end of the insulating cylinder, and a lower flange installed at the other end of the insulating cylinder, the upper and lower flanges being made of a good conductive material; a first through hole penetrating the middle of the upper flange, the first through hole having a flanged mounting portion folded outwards towards the direction away from the insulating cylinder; a second through hole penetrating the middle of the lower flange, and a ring of mounting holes provided around the edge of the lower flange. Based on this, the insulating assembly for the end support of the arc-extinguishing chamber can achieve the installation of the lower flange at the end of the arc-extinguishing chamber through the mounting holes, the positioning and installation of the first lead-out seat through the flanged mounting portion, and the installation of the corresponding contact seat through the first lead-out seat. Thus, components such as the contact seat located at the end of the arc-extinguishing chamber can be supported by this insulating assembly for the end support of the arc-extinguishing chamber, avoiding large flexible deformation and thus avoiding the various problems caused by flexible deformation mentioned above.

[0010] Furthermore, the upper flange, lower flange, and insulating cylinder are cast in one piece, and the casting process creates a seamless integral structure between the upper flange, lower flange, and insulating cylinder, effectively eliminating structural weaknesses caused by connection gaps and assembly stresses in traditional assembled structures. Simultaneously, this integrated structure significantly enhances the overall rigidity of the entire assembly, further suppressing the flexural deformation of the arc-extinguishing chamber. Especially under long-term or dynamic loads such as gravity and opening / closing impact forces, it maintains structural stability and reduces performance fluctuations caused by component loosening or displacement.

[0011] Furthermore, the edge of the upper flange is provided with an outer bend and an inner bend, and the edge of the insulating cylinder is located between the outer bend and the inner bend, and the insulating cylinder can be fixed by the cooperation of the outer bend and the inner bend.

[0012] Furthermore, the lower flange has an outer bend and an inner bend on the side facing the insulating cylinder. The edge of the insulating cylinder is located between the outer bend and the inner bend, and the insulating cylinder can be fixed by the cooperation of the outer bend and the inner bend.

[0013] The third technical solution provided by this invention is: an end support structure for an arc-extinguishing chamber, comprising a second outlet seat and an end support insulation assembly for the arc-extinguishing chamber. The end support insulation assembly for the arc-extinguishing chamber includes an insulating cylinder made of insulating material. The insulating cylinder is a conical cylindrical structure with openings at both ends. Inserts are provided at both ends of the insulating cylinder. The insert at the small-diameter end of the insulating cylinder is installed with the second outlet seat via fasteners. A contact seat is installed on the outer wall of the second outlet seat. An installation plate is installed with fasteners on the insert at the large-diameter end of the insulating cylinder. The edge of the installation plate is folded towards the direction close to the insulating cylinder to form a primary folded mounting portion. The edge of the primary folded mounting portion is folded away from the insulating cylinder to form a secondary folded mounting portion. An elastic element and a guide ring are sleeved on the outer side of the primary folded mounting portion. A cover plate is sleeved on the outer side of the elastic element and the guide ring. The edge of the cover plate is connected to an installation flange via fasteners. The edge of the installation flange is provided with fixing holes and positioning holes. The installation flange is connected to the end of the arc-extinguishing chamber via fasteners penetrating the fixing holes and positioning elements in the positioning holes. In this way, components such as the contact seat located at the end of the arc-extinguishing chamber can be supported by the end support insulation assembly of the arc-extinguishing chamber to avoid large flexible deformation, thereby avoiding the various problems caused by flexible deformation. At the same time, the guide ring can guide and absorb vibration, and the elastic element can ensure tight contact between the cover plate and the mounting plate, thereby reducing contact resistance, reducing the potential difference at the contact point, and avoiding local potential concentration.

[0014] Furthermore, a third through hole is penetrating the center of the outlet bracket 2, a fourth through hole is penetrating the center of the mounting plate, a fifth through hole is penetrating the center of the cover plate, and a sixth through hole is penetrating the center of the mounting flange. An auxiliary flange is provided on the outer side of the sixth through hole, and the auxiliary flange is installed on the outer side of the mounting flange by fasteners. A second mounting stop is provided on the side of the mounting flange facing the cover plate, and a third mounting stop is provided on the side of the mounting flange facing the auxiliary flange. The cover plate can be positioned by the second mounting stop, and the auxiliary flange can be positioned by the third mounting stop.

[0015] The fourth technical solution provided by the present invention is: an insulating assembly for the end support structure of the arc-extinguishing chamber, which includes an insulating cylinder made of insulating material. The insulating cylinder is a conical cylindrical structure with openings at both ends. Inserts are provided at both ends of the insulating cylinder, and the installation of the insulating cylinder with the corresponding outlet seat and the end of the arc-extinguishing chamber can be achieved through the cooperation of the inserts and fasteners.

[0016] Furthermore, the insulating cylinder and insert are cast into shape.

[0017] As can be seen from the above technical solutions, the present invention has the following advantages: First, both types of end support structures for the arc-extinguishing chamber in the present invention can play a supporting role, effectively avoiding the flexible deformation caused by excessive length of the arc-extinguishing chamber; and absorbing mechanical vibrations generated during mechanical life and transportation, improving the life of the arc-extinguishing chamber, etc., ensuring that the opening and closing speeds are not affected; Second, the present invention can be adjusted and aligned using special tooling during installation, such as positioning the cover plate and the mounting flange stop, and positioning the mounting flange and the arc-extinguishing chamber bolt hole pin, etc., thereby achieving the purpose of adjustment and alignment; At the same time, the present invention also leaves enough space to absorb the amount of thermal expansion and contraction deformation, preventing excessive stress from causing abnormalities; Moreover, the insulating cylinder in the end support insulation component for the arc-extinguishing chamber itself is an insulating structure, which can ensure pressure resistance and operational safety. Attached Figure Description

[0018] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. 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 a traditional arc-extinguishing chamber structure. Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the installation of the elastic element and the guide ring in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 5 This is a schematic diagram of the structure of Embodiment 3 of the present invention; Figure 6 This is a schematic diagram of the installation of the elastic element and the guide ring in Embodiment 3 of the present invention; Figure 7 This is a schematic diagram of the structure of Embodiment 4 of the present invention.

[0020] In the diagram: 1. Insulating platform; 2. Arc-extinguishing chamber break; 3. Plug-in structure; 4. Upper flange; 5. Insulating cylinder; 6. Lower flange; 7. End support insulation assembly for arc-extinguishing chamber; 8. Insert; 9. Outlet seat one; 10. Elastic element; 11. Guide ring; 12. Mounting flange; 13. Outlet seat two; 14. Mounting plate; 15. Auxiliary flange; 16. Fastener; 17. Cover plate; 18. Contact seat; 19. Outer bend one; 20. Inner bend one; 21. Outer bend two; 22. Inner bend two; 23. First through hole; 24. Second through hole; 25. Mounting hole; 26. Mounting groove; 27. Flanged mounting part; 28. Third through hole; 29. ​​Fourth through hole; 30. Sixth through hole; 31. Secondary flanged mounting part; 32. Primary flanged mounting part. Detailed Implementation

[0021] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0022] Example 1 like Figure 2 , Figure 3 As shown, this embodiment provides an end support structure for an arc-extinguishing chamber, which includes a lead-out socket 9 and an end support insulation assembly 7 for the arc-extinguishing chamber. The end support insulation assembly 7 includes an insulating cylinder 5 made of insulating material. The insulating cylinder 5 is a cylindrical structure open at both ends. An upper flange 4 is installed at one end of the insulating cylinder 5, and a lower flange 6 is installed at the other end. The upper flange 4 and the lower flange 6 are made of a good conductive material and are cast together with the insulating cylinder 5.

[0023] Meanwhile, a first through hole 23 penetrates the middle of the upper flange 4. The first through hole 23 is folded outwards towards the direction away from the insulating cylinder 5 to form a flanged mounting part 27. A guide ring 11 and an elastic element 10 are sleeved on the outer side of the flanged mounting part 27, and the guide ring 11 is made of plastic. A second through hole 24 penetrates the middle of the lower flange 6. An mounting flange 12 is installed on the edge of the lower flange 6 by fasteners 16. The edge of the mounting flange 12 is provided with fixing holes and positioning holes, and the mounting flange 12 is connected to the end of the arc-extinguishing chamber by fasteners 16 penetrating the fixing holes and positioning elements in the positioning holes.

[0024] The outer wall of the outlet seat 9 is equipped with a contact seat 18. The outlet seat 9 is provided with a mounting groove 26 on the side facing the end support insulation component 7 for the arc extinguishing chamber. The mounting groove 26 is sleeved on the outside of the flange mounting part 27, and the elastic element 10 and the guide ring 11 are located between the groove wall of the mounting groove 26 and the flange mounting part 27.

[0025] Thus, components such as the contact seat 18 located at the end of the arc-extinguishing chamber can be supported by the end support insulation assembly 7 of the arc-extinguishing chamber to avoid large flexible deformation, thereby avoiding the various problems caused by flexible deformation. At the same time, the elastic element 10 and the guide ring 11 can guide and absorb vibration, and ensure tight contact between the upper flange 4 and the outlet seat 9, so as to reduce contact resistance, reduce the potential difference at the contact point, and avoid local potential concentration.

[0026] Furthermore, as a preferred embodiment, this embodiment may also provide a mounting stop on the side of the mounting flange 12 facing the end support insulation assembly 7 for the arc-extinguishing chamber, and the end support insulation assembly 7 for the arc-extinguishing chamber may be positioned through the mounting stop.

[0027] Example 2 like Figure 4 As shown, this embodiment two provides an end-support insulation assembly for the arc-extinguishing chamber used in the end-support structure of the arc-extinguishing chamber described in embodiment one. It includes an insulating cylinder 5 made of insulating material, which is a cylindrical structure open at both ends. An upper flange 4 is installed at one end of the insulating cylinder 5, and a lower flange 6 is installed at the other end. Both the upper flange 4 and the lower flange 6 are made of a good conductive material. A first through hole 23 penetrates the middle of the upper flange 4, and the first through hole 23 is folded outwards towards the direction away from the insulating cylinder 5, forming a flanged mounting portion 27. The edge of the upper flange 4 is provided with an outer bend portion 19 and an inner bend portion 20. The edge of the insulating cylinder 5 is located between the outer bend portion 19 and the inner bend portion 20, and the insulating cylinder 5 can be fixed by the cooperation of the outer bend portion 19 and the inner bend portion 20.

[0028] The lower flange 6 has a second through hole 24 in the middle, and the lower flange 6 has a ring of mounting holes 25 around its edge. The lower flange 6 has an outer bend 21 and an inner bend 22 on the side facing the insulating cylinder 5. The edge of the insulating cylinder 5 is located between the outer bend 21 and the inner bend 22, and the insulating cylinder 5 can be fixed by the cooperation of the outer bend 21 and the inner bend 22.

[0029] Based on this, the end support insulation assembly 7 for the arc-extinguishing chamber allows the lower flange 6 to be installed at the end of the arc-extinguishing chamber via the mounting hole 25, the outlet seat 9 to be positioned via the flanged mounting part 27, and the corresponding contact seat 18 to be installed via the outlet seat 9. Thus, components such as the contact seat 18 located at the end of the arc-extinguishing chamber can be supported by the end support insulation assembly 7 to prevent significant flexural deformation, thereby avoiding the aforementioned problems caused by flexural deformation.

[0030] Example 3 like Figure 5 , Figure 6 As shown, this embodiment four provides a second type of end support structure for an arc-extinguishing chamber, which includes a second outlet seat 13 and an end support insulation assembly 7 for the arc-extinguishing chamber. The end support insulation assembly 7 for the arc-extinguishing chamber includes an insulating cylinder 5 made of insulating material. The insulating cylinder 5 is a conical cylindrical structure with openings at both ends. Inserts 8 are provided at both ends of the insulating cylinder 5. The insert 8 at the small diameter end of the insulating cylinder 5 is installed with the second outlet seat 13 by fasteners 16. A contact seat 18 is installed on the outer wall of the second outlet seat 13. An installation plate 14 is installed with the insert 8 at the large diameter end of the insulating cylinder 5 by fasteners 16. The installation plate 14... A primary flange mounting part 32 is formed by folding the edge towards the insulating cylinder 5. A secondary flange mounting part 31 is formed by folding the edge of the primary flange mounting part 32 towards the direction away from the insulating cylinder 5. An elastic element 10 and a guide ring 11 are sleeved on the outer side of the primary flange mounting part 32. A cover plate 17 is sleeved on the outer side of the elastic element 10 and the guide ring 11. The edge of the cover plate 17 is connected to the mounting flange 12 by fasteners 16. The edge of the mounting flange 12 is provided with fixing holes and positioning holes. The mounting flange 12 is connected to the end of the arc-extinguishing chamber by fasteners 16 that pass through the fixing holes and positioning elements that pass through the positioning holes.

[0031] Meanwhile, in this embodiment, a third through hole 28 is provided in the middle of the outlet seat 2, a fourth through hole 29 is provided in the middle of the mounting plate 14, a fifth through hole is provided in the middle of the cover plate 17, and a sixth through hole 30 is provided in the middle of the mounting flange 12. An auxiliary flange 15 is provided on the outside of the sixth through hole 30. The auxiliary flange 15 is installed on the outside of the mounting flange 12 by fasteners 16. A second mounting stop is provided on the side of the mounting flange 12 facing the cover plate 17, and a third mounting stop is provided on the side of the mounting flange 12 facing the auxiliary flange 15. The cover plate 17 can be positioned by the second mounting stop, and the auxiliary flange 15 can be positioned by the third mounting stop.

[0032] Thus, components such as the contact seat 18 located at the end of the arc-extinguishing chamber can be supported by the end support insulation component 7 of the arc-extinguishing chamber to avoid large flexible deformation, thereby avoiding the various problems caused by flexible deformation. At the same time, the elastic element 10 and the guide ring 11 can guide and absorb vibration, and indirectly ensure tight contact between the insulating cylinder 5 and the outlet seat 13, so as to reduce contact resistance, reduce the potential difference at the contact point, and avoid local potential concentration.

[0033] Example 4 like Figure 7 As shown, this embodiment four provides an arc-extinguishing chamber end support insulation component 7 for the arc-extinguishing chamber end support structure described in embodiment three. It includes an insulating cylinder 5 made of insulating material. The insulating cylinder 5 is a conical cylindrical structure with open ends. The two ends of the insulating cylinder 5 are fitted with inserts 8 by casting molding process. The insulating cylinder 5 can be installed with the corresponding outlet seat 13 and the arc-extinguishing chamber end through the cooperation of the inserts 8 and the fasteners 16.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An end support structure for an arc extinguishing chamber, characterized by, The application relates to an arc extinguishing chamber end support insulation assembly (7) and an outlet seat (9) which are used for an arc extinguishing chamber, wherein the arc extinguishing chamber end support insulation assembly (7) comprises an insulation cylinder (5) made of insulation material, the insulation cylinder (5) is in a tubular structure with both ends being open, an upper flange (4) is arranged at one end of the insulation cylinder (5), a lower flange (6) is arranged at the other end of the insulation cylinder (5), the upper flange (4) and the lower flange (6) are made of benign conductive material, a first through hole (23) is arranged in the middle of the upper flange (4), the first through hole (23) is outwardly folded with a folded mounting portion (27) in a direction away from the insulation cylinder (5), a guide ring (11) and an elastic piece (10) are arranged outside the folded mounting portion (27), a second through hole (24) is arranged in the middle of the lower flange (6), the lower flange (6) is provided with a mounting flange (12) through fasteners (16), the edge of the mounting flange (12) is provided with a fixing hole and a positioning hole, the mounting flange (12) is connected with the end of the arc extinguishing chamber through the fasteners (16) penetrating the fixing hole and the positioning hole, the outer wall of the outlet seat (9) is provided with a contact seat (18), one side of the outlet seat (9) is provided with a mounting groove (26) for the arc extinguishing chamber end support insulation assembly (7), the mounting groove (26) is arranged outside the folded mounting portion (27), and the elastic piece (10) and the guide ring (11) are arranged between the groove wall of the mounting groove (26) and the folded mounting portion (27).

2. The end support structure for an arc extinguishing chamber according to claim 1, characterized by The guide ring (11) is made of plastic.

3. The end support structure for an arc extinguishing chamber according to claim 1, characterized by, The mounting flange (12) is provided with a mounting stop one on one side of the arc extinguishing chamber end support insulation assembly (7).

4. An end support insulating assembly for an arc-extinguishing chamber according to any one of claims 1-3, characterized in that The application relates to an arc extinguishing chamber end support insulation assembly (7) and an outlet seat (9) which are used for an arc extinguishing chamber, wherein the arc extinguishing chamber end support insulation assembly (7) comprises an insulation cylinder (5) made of insulation material, the insulation cylinder (5) is in a tubular structure with both ends being open, an upper flange (4) is arranged at one end of the insulation cylinder (5), a lower flange (6) is arranged at the other end of the insulation cylinder (5), the upper flange (4) and the lower flange (6) are made of benign conductive material, a first through hole (23) is arranged in the middle of the upper flange (4), the first through hole (23) is outwardly folded with a folded mounting portion (27) in a direction away from the insulation cylinder (5); a second through hole (24) is arranged in the middle of the lower flange (6), and a ring of mounting holes (25) is arranged at the edge of the lower flange (6).

5. The end support insulating assembly for an arc chute according to claim 4, wherein The upper flange (4), the lower flange (6) and the insulation cylinder (5) are cast formed.

6. The end support insulating assembly for an arc chute according to Claim 4, wherein The edge of the upper flange (4) is provided with an outer folding portion one (19) and an inner folding portion one (20), and the edge of the insulation cylinder (5) is located between the outer folding portion one (19) and the inner folding portion one (20).

7. The end support insulating assembly for an arc chute according to Claim 4, wherein The edge of the lower flange (6) is provided with an outer folding portion two (21) and an inner folding portion two (22) on one side of the insulation cylinder (5), and the edge of the insulation cylinder (5) is located between the outer folding portion two (21) and the inner folding portion two (22).

8. An end support structure for an arc extinguishing chamber, characterized by The application relates to an arc extinguishing chamber end support insulation assembly (7) and a second outlet seat (13) comprising the arc extinguishing chamber end support insulation assembly (7), wherein the arc extinguishing chamber end support insulation assembly (7) comprises an insulation cylinder (5) made of insulation material, the insulation cylinder (5) is a conical cylinder structure with both ends being open, inserts (8) are arranged at both ends of the insulation cylinder (5), the insert (8) at the small-diameter end of the insulation cylinder (5) is installed on the second outlet seat (13) through fasteners (16), and a contact seat (18) is arranged on the outer wall of the second outlet seat (13); the insert (8) at the large-diameter end of the insulation cylinder (5) is installed on a mounting plate (14) through fasteners (16), an edge of the mounting plate (14) is folded towards the insulation cylinder (5) to form a first folded edge mounting portion (32), an edge of the first folded edge mounting portion (32) is folded away from the insulation cylinder (5) to form a second folded edge mounting portion (31), an elastic element (10) and a guide ring (11) are arranged on the outer side of the first folded edge mounting portion (32), and a cover plate (17) is arranged on the outer side of the elastic element (10) and the guide ring (11); an edge of the cover plate (17) is connected with a mounting flange (12) through fasteners (16), the mounting flange (12) is provided with fixing holes and positioning holes, and the mounting flange (12) is connected with the end of the arc extinguishing chamber through fasteners (16) penetrating the fixing holes and positioning elements penetrating the positioning holes.

9. The end support structure for an arc extinguishing chamber according to claim 8, characterized by A third through hole (28) is arranged in the middle of the second outlet seat, a fourth through hole (29) is arranged in the middle of the mounting plate (14), a fifth through hole is arranged in the middle of the cover plate (17), a sixth through hole (30) is arranged in the middle of the mounting flange (12), an auxiliary flange (15) is arranged on the outer side of the sixth through hole (30), and the auxiliary flange (15) is installed on the outer side of the mounting flange (12) through fasteners (16); a mounting stopper two is arranged on one side of the mounting flange (12) towards the cover plate (17), and a mounting stopper three is arranged on one side of the mounting flange (12) towards the auxiliary flange (15).

10. An arc chute end support insulating assembly for use in an arc chute end support structure according to claim 8, characterized by The application relates to an arc extinguishing chamber end support insulation assembly (7) and a second outlet seat (13) comprising the arc extinguishing chamber end support insulation assembly (7), wherein the arc extinguishing chamber end support insulation assembly (7) comprises an insulation cylinder (5) made of insulation material, the insulation cylinder (5) is a conical cylinder structure with both ends being open, inserts (8) are arranged at both ends of the insulation cylinder (5).

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