Heat conduction enhanced vacuum arc-extinguishing chamber
By setting up a variety of thermal conductivity and protective layer components inside the vacuum arc extinguishing chamber, the problem of poor thermal conductivity is solved, the load-bearing capacity for large rated currents and temperature rise heat is improved, and the manufacturing and maintenance process is simplified.
Patent Information
- Application Number
- CN202323514258.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-22
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2033-12-22
AI Technical Summary
When the existing vacuum arc extinguishing chamber carries large rated current and temperature rise heat, the thermal conductivity is limited, resulting in poor thermal conductivity, requiring replacement of dynamic and static contacts, and the overall manufacturing and installation are inconvenient.
By providing a first dynamic and static contact, a positioned heat conduction wire, a fixing bolt, a first metal heat conduction cover, a second dynamic and static contact and a dislocation heat conduction wire inside the vacuum arc extinguishing chamber, the contact area and thermal conduction capacity are increased, and the ceramic shell is in the Components such as high-temperature resistant protective layers and positioning bolts are used in the body to improve thermal conductivity and high-temperature resistance.
Without changing the shape of the vacuum arc extinguishing chamber, the internal thermal conductivity and contact area are enhanced, the carrying capacity of large rated current and temperature rise heat is improved, and the assembly and maintenance process is simplified.
Smart Images
Figure CN222300550U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of vacuum interrupter chambers, in particular to a heat-conductivity-enhanced vacuum interrupter chamber. Background Art
[0002] The vacuum interrupter, also known as the vacuum switch tube, is the core component of medium and high voltage power switches. Its main function is to quickly extinguish the arc and suppress the current after the medium and high voltage circuit is cut off from the power supply through the excellent insulation of the vacuum inside the tube, so as to avoid accidents and unexpected events. It is mainly used in power transmission and distribution control systems, as well as in power distribution systems such as metallurgy, mining, petroleum, chemical industry, railways, broadcasting, communications, and industrial high-frequency heating. It has the characteristics of energy saving, material saving, fire prevention, explosion prevention, small size, long life, low maintenance cost, reliable operation and no pollution. The vacuum interrupter is divided into the interrupter for circuit breakers and the interrupter for load switches according to its use. The interrupter for circuit breakers is mainly used in substations and power grid facilities in the power sector, and the interrupter for load switches is mainly used by end users of the power grid.
[0003] After searching, a vacuum arc extinguishing chamber with a publication number of CN216389182U is found, which specifically discloses a vacuum arc extinguishing chamber, including a porcelain shell and a main shielding cover located inside the porcelain shell, at least one end of the main shielding cover is flanged, and the flange is brazed and connected to the boss on the inside of the porcelain shell. In the vacuum arc extinguishing chamber of the utility model, the flange on the main shielding cover is directly welded to the boss on the porcelain shell, and the structure is simple, the assembly is convenient, the cost is low, and the insulation effect of the vacuum arc extinguishing chamber is good.
[0004] In the above patent, the flange on the main shielding cover is directly welded to the boss on the porcelain shell only through the porcelain shell, the main shielding cover, the flange and the boss. The structure is simple, the assembly is convenient, the cost is low, and the insulation effect of the vacuum arc chamber is good. However, the vacuum arc chamber carries the current and conducts internal heat by the method of transmitting at both ends during use, and only relies on the contact for point contact. The heat conduction heat is limited and cannot fully enhance the internal heat conduction of the vacuum arc chamber. When it is necessary to carry a large rated current and temperature rise heat, the vacuum arc chamber is not convenient to use. Not only does it need to replace the matching moving and static contacts, but it is also inconvenient to manufacture and install the whole.
[0005] Therefore, it is necessary to invent a heat-conducting enhanced vacuum interrupter to solve the above problems. Utility Model Content
[0006] The utility model aims to provide a heat-conducting enhanced vacuum interrupter, which can enhance the heat-conducting capacity and contact area of the internal contacts without changing the manufacturing shape of the vacuum interrupter itself through first moving and static contacts, sequential heat-conducting wires, fixing bolts, first metal heat-conducting covers, second moving and static contacts and offset heat-conducting wires, so as to further facilitate the vacuum interrupter to meet different requirements of carrying large rated currents and heat rises, and improve the overall scope of application, so as to solve the problem that in the prior art, the vacuum interrupter carries current and conducts internal heat through the method of transmitting at both ends during use, and only relies on point contact of the contacts, so that the heat conduction is limited and the internal heat conduction of the vacuum interrupter cannot be fully enhanced. When it is necessary to carry large rated currents and heat rises, the vacuum interrupter is not convenient to use, and not only does it need to replace the matching moving and static contacts, but it is also inconvenient to manufacture and install the whole.
[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a thermally conductive enhanced vacuum arc extinguishing chamber, comprising a ceramic outer shell, a static end conductive block is fixedly installed inside the ceramic outer shell, a static end conductive rod is fixedly installed above the static end conductive block, a first moving and static contact is fixedly installed on the top of the static end conductive rod, a chronological thermal conductive wire is fixedly installed above the first moving and static contact, a fixing bolt penetrates the outside of the first moving and static contact, one end of the fixing bolt is movably connected to a first metal thermal conductive cover, a second moving and static contact is arranged above the first moving and static contact, a staggered thermal conductive wire is fixedly installed at the bottom of the second moving and static contact, a second metal thermal conductive cover is fixedly installed outside the second moving and static contact, and an upper bellows is fixedly installed above the second moving and static contact.
[0008] Preferably, an inner limit block is fixedly installed inside the ceramic outer shell, a shielding cylinder is arranged inside the inner limit block, and a high-temperature resistant protective layer is attached to the inner surface of the shielding cylinder.
[0009] Preferably, the high temperature resistant protective layer is tightly fitted to the shielding tube, and the material of the high temperature resistant protective layer is silicon carbide.
[0010] Preferably, the first metal heat-conducting cover is movably connected to the first moving and stationary contacts, and the fixing bolts are distributed on the first moving and stationary contacts at equal intervals.
[0011] Preferably, a positioning bolt passes through the top of the ceramic outer shell, one end of the positioning bolt is movably connected to an upper movable end cover plate, and a movable conductive rod is fixedly installed above the upper movable end cover plate.
[0012] Preferably, the upper movable end cover plate is movably connected to the ceramic outer shell, and the positioning bolts are distributed in a ring array on the upper movable end cover plate.
[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:
[0014] 1. Through the arrangement of the first moving and static contact, the chronological heat conductive wire, the fixing bolt, the first metal heat conductive cover, the second moving and static contact and the offset heat conductive wire, when the vacuum interrupter is used, after the first moving and static contact contacts the second moving and static contact, the chronological heat conductive wire and the offset heat conductive wire not only increase the contact area between the first moving and static contact and the second moving and static contact, but also the offset contact of the chronological heat conductive wire and the offset heat conductive wire also adds another contact mode to the mode of relying solely on point contact of the contacts, and the first metal heat conductive cover and the second metal heat conductive cover outside the first moving and static contact and the second moving and static contact further enhance the heat conductivity of the current generated after the contact, so that the heat conductivity and contact area of the internal contacts are enhanced without changing the manufacturing shape of the vacuum interrupter itself, which further facilitates the vacuum interrupter to meet different load rated currents and temperature rise requirements, thereby improving the overall scope of application;
[0015] 2. Through the arrangement of the ceramic outer shell, the inner limit block, the shielding tube, the high-temperature resistant protective layer, the positioning bolts, the upper moving end cover plate and the moving conductive rod, when the vacuum arc extinguishing chamber is in use, the shielding tube strengthens the internal heat conduction on the original basis through the internal high-temperature resistant protective layer, and the high-temperature resistance of the internal components is improved. Moreover, the material of the high-temperature resistant protective layer is silicon carbide, which not only has a certain high-temperature resistance, but also has good conductivity, so that the internal current and high-temperature bearing capacity are smoother. The overall structure of the positioning bolts and the upper moving end cover plate is simple, which is convenient for the internal components to be assembled after the vacuum arc extinguishing chamber is produced, and does not delay the overall use time. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0018] Figure 2 This is a schematic diagram of the shielding tube structure of the utility model;
[0019] Figure 3 This is a schematic diagram of the first moving and static contact structure of the utility model;
[0020] Figure 4 This is a schematic diagram of the second moving and static contact structure of the utility model;
[0021] Figure 5 It is a schematic diagram of the structure of the upper movable end cover plate of the utility model.
[0022] Description of reference numerals:
[0023] 1. Ceramic outer shell; 2. Inner limit block; 3. Shielding tube; 4. High temperature resistant protective layer; 5. Static end conductive block; 6. Static end conductive rod; 7. First moving and static contacts; 8. Sequential thermal wire; 9. Fixing bolt; 10. First metal thermal cover; 11. Second moving and static contacts; 12. Offset thermal wire; 13. Second metal thermal cover; 14. Upper bellows; 15. Positioning bolt; 16. Upper moving end cover; 17. Moving conductive rod. DETAILED DESCRIPTION
[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0025] The utility model provides Figure 1-5 A heat-conducting enhanced vacuum interrupter is shown, comprising a ceramic outer shell 1, a static end conductive block 5 is fixedly installed inside the ceramic outer shell 1, a static end conductive rod 6 is fixedly installed above the static end conductive block 5, a first moving and static contact 7 is fixedly installed on the top of the static end conductive rod 6, a chronological heat-conducting wire 8 is fixedly installed above the first moving and static contact 7, a fixing bolt 9 is passed through the outside of the first moving and static contact 7, one end of the fixing bolt 9 is movably connected to a first metal heat-conducting cover 10, a second moving and static contact 11 is arranged above the first moving and static contact 7, a staggered heat-conducting wire 12 is fixedly installed at the bottom of the second moving and static contact 11, a second metal heat-conducting cover 13 is fixedly installed outside the second moving and static contact 11, an upper bellows 14 is fixedly installed above the second moving and static contact 11, and after the first moving and static contact 7 contacts with the second moving and static contact 11, the chronological heat-conducting wire 8 and the staggered heat-conducting wire 12 not only increase the contact area between the first moving and static contact 7 and the second moving and static contact 11.
[0026] like Figure 1 and Figure 2 As shown, an inner limit block 2 is fixedly installed inside the ceramic outer shell 1, a shielding tube 3 is arranged inside the inner limit block 2, and a high-temperature resistant protective layer 4 is bonded to the inner surface of the shielding tube 3. Multiple groups of inner limit blocks 2 are convenient for limiting the installation of the shielding tube 3 inside the ceramic outer shell 1. The high-temperature resistant protective layer 4 fits tightly with the shielding tube 3. The material of the high-temperature resistant protective layer 4 is silicon carbide. The material of the high-temperature resistant protective layer 4 is silicon carbide, which not only has a certain high-temperature resistance, but also has good conductivity, making the internal current and high-temperature carrying capacity smoother.
[0027] like Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, the first metal heat-conducting cover 10 is movably connected with the first moving and static contact 7, and the fixing bolts 9 are distributed at equal intervals on the first moving and static contact 7. The first metal heat-conducting cover 10 and the second metal heat-conducting cover 13 outside the first moving and static contact 7 and the second moving and static contact 11 further enhance the thermal conductivity of the current generated after contact. A positioning bolt 15 passes through the top of the ceramic outer shell 1, and one end of the positioning bolt 15 is movably connected with an upper moving end cover plate 16, and a moving conductive rod 17 is fixedly installed above the upper moving end cover plate 16. The overall structure of the positioning bolt 15 and the upper moving end cover plate 16 is simple, which is convenient for internal components to be assembled after the vacuum arc extinguishing chamber is produced, and does not delay the overall service life. The upper moving end cover plate 16 is movably connected to the ceramic outer shell 1, and the positioning bolts 15 are distributed in a ring array on the upper moving end cover plate 16. The overall structure of the upper moving end cover plate 16 is simple and the cost is low. If a fault occurs, it is also convenient for maintenance personnel to replace it in time.
[0028] The practical working principle of the present invention is as follows: first, according to the requirements of the maximum rated current and the temperature rise that the vacuum arc chamber needs to meet, the shielding tube 3 is first installed in a limited manner inside the ceramic outer shell 1 through multiple groups of internal limit blocks 2, and then the static end conductive block 5, the static end conductive rod 6, the first moving and static contact 7, the second moving and static contact 11 and the upper bellows 14 are installed inside the shielding tube 3, and then the upper moving end cover plate 16 is packaged with the ceramic outer shell 1 through the external positioning bolts 15. In this way, the vacuum arc chamber is installed and can be connected to an external power supply for carrying current. During use, after the first moving and static contact 7 contacts with the second moving and static contact 11, the aligned thermal wire 8 and the offset thermal wire 12 increase the contact area between the first moving and static contact 7 and the second moving and static contact 11, and then the offset contact between the aligned thermal wire 8 and the offset thermal wire 12 also adds a contact method to the method of relying solely on point contact between the contacts, and then the first moving and static contact 7 and the second moving and static contact 11 are combined to form a contact area between the first moving and static contact 7 and the second moving and static contact 11. The first metal heat-conducting cover 10 and the second metal heat-conducting cover 13 outside the two moving and static contacts 11 further enhance the thermal conductivity of the current generated after contact, thereby enhancing the thermal conductivity and contact area of the internal contacts without changing the manufacturing shape of the vacuum arc chamber itself, and further facilitating the vacuum arc chamber to meet different load-rated currents and temperature rise heat requirements. Subsequently, after the internal heat conductivity is enhanced, the shielding tube 3 enhances the high-temperature resistance of the internal components on the original basis through the internal high-temperature resistant protective layer 4, and the material of the high-temperature resistant protective layer 4 is silicon carbide, which not only has a certain high-temperature resistance, but also has good electrical conductivity, so that the internal current and high-temperature bearing capacity are smoother. Finally, after completing the installation and use of all the thermally conductive enhanced vacuum arc chambers according to the above operations, turn off the external power supply and perform daily maintenance on the device. The material of the high-temperature resistant protective layer 4 is: silicon carbide, and the use process of the thermally conductive enhanced vacuum arc chamber is completed.
[0029] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A heat-conductivity enhanced vacuum interrupter, comprising a ceramic outer shell (1), characterized in that: A static end conductive block (5) is fixedly mounted inside the ceramic outer shell (1), a static end conductive rod (6) is fixedly mounted above the static end conductive block (5), a first movable and static contact (7) is fixedly mounted on the top of the static end conductive rod (6), a chronological heat conductive wire (8) is fixedly mounted above the first movable and static contact (7), a fixing bolt (9) passes through the outside of the first movable and static contact (7), one end of the fixing bolt (9) is movably connected to a first metal heat conductive cover (10), a second movable and static contact (11) is arranged above the first movable and static contact (7), a dislocated heat conductive wire (12) is fixedly mounted at the bottom of the second movable and static contact (11), a second metal heat conductive cover (13) is fixedly mounted outside the second movable and static contact (11), and an upper corrugated pipe (14) is fixedly mounted above the second movable and static contact (11).
2. The heat-conductivity-enhanced vacuum interrupter according to claim 1, characterized in that: An inner limit block (2) is fixedly mounted inside the ceramic outer shell (1), a shielding cylinder (3) is arranged inside the inner limit block (2), and a high temperature resistant protective layer (4) is attached to the inner surface of the shielding cylinder (3).
3. The heat-conductivity-enhanced vacuum interrupter according to claim 2, characterized in that: The high temperature resistant protective layer (4) is tightly fitted to the shielding tube (3), and the material of the high temperature resistant protective layer (4) is silicon carbide.
4. The heat-conductivity enhanced vacuum interrupter according to claim 1, characterized in that: The first metal heat-conducting cover (10) is movably connected to the first moving and stationary contacts (7), and the fixing bolts (9) are distributed at equal intervals on the first moving and stationary contacts (7).
5. The heat-conductivity-enhanced vacuum interrupter according to claim 1, characterized in that: A positioning bolt (15) passes through the upper part of the ceramic outer shell (1); one end of the positioning bolt (15) is movably connected to an upper movable end cover plate (16); and a movable conductive rod (17) is fixedly mounted above the upper movable end cover plate (16).
6. The heat-conductivity-enhanced vacuum interrupter according to claim 5, characterized in that: The upper movable end cover plate (16) is movably connected to the ceramic outer shell (1), and the positioning bolts (15) are distributed in a ring array on the upper movable end cover plate (16).