CN117174526B - Vacuum arc-extinguishing chamber with prolonged service life - Google Patents
Vacuum arc-extinguishing chamber with prolonged service life Download PDFInfo
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- CN117174526B CN117174526B CN202311451459.9A CN202311451459A CN117174526B CN 117174526 B CN117174526 B CN 117174526B CN 202311451459 A CN202311451459 A CN 202311451459A CN 117174526 B CN117174526 B CN 117174526B
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- 230000002035 prolonged effect Effects 0.000 title abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 45
- 230000003068 static effect Effects 0.000 claims abstract description 15
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 239000000919 ceramic Substances 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims 2
- 229910052573 porcelain Inorganic materials 0.000 abstract description 19
- 230000001681 protective effect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention discloses a vacuum arc-extinguishing chamber with prolonged service life, which comprises a porcelain shell and an inner shielding cylinder, wherein sealing rings are respectively arranged at the upper end and the lower end of the porcelain shell, a movable cover plate is fixedly arranged at the outer end of the sealing ring at one side, a movable conducting rod is movably arranged at the inner end of the movable cover plate, a protective cover is arranged at a step of the outer peripheral surface of the movable conducting rod, a corrugated pipe structure is arranged between the protective cover and the movable cover plate, a static cover plate is fixedly arranged at the outer end of the sealing ring at the other side, and the inner end of the static cover plate is provided with the static conducting rod.
Description
Technical Field
The invention belongs to the technical field of vacuum arc-extinguishing chambers, and particularly provides a vacuum arc-extinguishing chamber with prolonged service life.
Background
The vacuum arc-extinguishing chamber is a core component of a medium-high voltage power switch, and has the main effects of enabling the medium-high voltage power switch to rapidly extinguish arcs and inhibit current after the power supply is cut off through the excellent insulativity of vacuum in a pipe, avoiding accidents and accidents, and is mainly applied to power transmission and distribution control systems of electric power, and also applied to power distribution systems of metallurgy, mines, petroleum, chemical industry, railways, broadcasting, communication, industrial high-frequency heating and the like.
For the vacuum arc-extinguishing chamber, the main determinant influencing the mechanical life of the vacuum arc-extinguishing chamber is a corrugated pipe, and as the moving and static contacts in the vacuum arc-extinguishing chamber are separated and combined once, the inner and outer bending parts of the corrugated thin wall of the corrugated pipe are subjected to large mechanical deformation, and the corrugated pipe is easily damaged due to material fatigue due to frequent and severe deformation for a long time, so that the vacuum arc-extinguishing chamber cannot be used due to air leakage.
In addition, in the moving process of the movable conducting rod of the vacuum arc-extinguishing chamber, the corrugated pipe can be twisted, and the corrugated pipe can be broken seriously, so that the service life of the vacuum arc-extinguishing chamber is influenced.
There is a need for a vacuum interrupter that increases the structural strength of the bellows and thus increases the useful life.
Disclosure of Invention
In order to solve the problems, the invention provides a vacuum arc-extinguishing chamber with prolonged service life.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a vacuum interrupter of increase of service life, includes porcelain shell and interior shielding section of thick bamboo, the upper and lower both ends of porcelain shell are equipped with the seal ring respectively, one side the outer fixed mounting of seal ring has movable cover plate, movable cover plate's inner removal is equipped with movable conducting rod, movable conducting rod's outer peripheral face ladder department is equipped with the safety cover, be equipped with bellows structure between safety cover and the movable cover plate, the opposite side seal ring's outer fixed mounting has quiet apron, quiet conducting rod is equipped with to quiet apron's inner, movable conducting rod and quiet conducting rod's inner all are equipped with the coil, the inner of coil all is equipped with the contact, interior shielding section of thick bamboo is assembled in porcelain shell's inner wall.
The corrugated pipe structure comprises a disc-shaped annular plate, the disc-shaped annular plate is sleeved on the outer wall of the movable conducting rod, the surface of the disc-shaped annular plate is a conical surface, a conical surface bus of the disc-shaped annular plate is a smooth curve, a plurality of the disc-shaped annular plates are stacked in a positive-negative staggered mode, annular sealing grooves are formed in outer rings and inner rings of the surface of the disc-shaped annular plate, and sealing rings are assembled inside the annular sealing grooves of the adjacent disc-shaped annular plates.
Further, the inner end and the outer end of the conical surface of the disc-shaped annular plate are parallel planes.
Further, the annular sealing groove and the sealing ring are in interference fit, and the thickness of the sealing ring is greater than twice the thickness of the annular sealing groove.
Further, the surface outer ring of the dish-shaped annular plate is welded with a reinforcing plate, the outer end of the reinforcing plate is integrally formed with an anti-deflection limiting plate, the inner wall of the movable cover plate is uniformly and fixedly provided with an anti-deflection guide plate, the two anti-deflection guide plates are in a group, and the anti-deflection limiting plate is positioned between the group of anti-deflection guide plates.
Further, the inner wall fixed mounting of movable cover plate has the heat conduction board of being connected with the anti-deviation deflector, fixed mounting has the heat conduction backup pad between the lateral wall of anti-deviation deflector and the heat conduction board, the outer wall fixed mounting of movable cover plate has the heat dissipation post.
Further, the porcelain shell is two in total, the porcelain shell is connected to form a whole, the inner surface of the porcelain shell is integrally formed with an outer shielding cylinder connecting ring, the inner end of the outer shielding cylinder connecting ring is integrally formed with an outer shielding cylinder, the outer wall of the inner shielding cylinder is integrally formed with a mounting ring, the mounting ring is inserted between the outer shielding cylinder connecting rings, the inner wall of the outer shielding cylinder connecting ring is integrally formed with an inserting ring, the inner wall of the outer shielding cylinder connecting ring is provided with an annular groove corresponding to the inserting ring, the inserting ring is inserted in the annular groove, and the inner end of the inserting ring is provided with a sealing gasket.
Further, the inner diameter and height of the outer shield cylinder are greater than the outer diameter and height of the inner shield cylinder.
Further, a guide sleeve is fixedly arranged on the upper wall of the inner end of the movable cover plate, and the movable conductive rod is movably assembled in the guide sleeve.
Further, the outer wall of the movable conducting rod and the outer wall of the guide sleeve are sleeved with sealing rings, the lower end of the corrugated pipe structure is welded between the sealing rings and the protective cover, and the upper end of the corrugated pipe structure is welded between the movable cover plate and the sealing rings.
The beneficial effects of using the invention are as follows:
the corrugated pipe structure is designed to be formed by stacking a plurality of disc-shaped annular plates in a positive and negative staggered manner, and when the movable conducting rod moves, the corrugated pipe structure has small mechanical deformation degree, so that the corrugated pipe structure can bear deformation caused by the opening and closing actions of the movable conducting rod and the contact on the static conducting rod for more times, the strength of the corrugated pipe structure is enhanced, the service life of the corrugated pipe structure is prolonged, and the service life of the vacuum arc extinguishing chamber is prolonged.
According to the invention, the anti-deflection limiting plate is arranged on the corrugated pipe structure, and the anti-deflection guide plate is arranged on the movable cover plate, so that the situation that the corrugated pipe structure twists in the use process can be effectively avoided by matching the anti-deflection limiting plate with the movable cover plate, the stability of the corrugated pipe structure is ensured, the service life of the corrugated pipe structure is prolonged, and the service life of the vacuum arc-extinguishing chamber is prolonged.
According to the invention, the structure of the heat conducting plate, the heat conducting supporting plate and the heat radiating column is arranged on the movable cover plate, so that heat on the corrugated pipe structure can be effectively radiated, the phenomenon that the corrugated pipe structure is excessively bent and deformed in the axial direction due to internal pressure and heat difference stress is avoided, and the stability and the service life of the corrugated pipe structure are further improved.
The invention designs the inner shielding cylinder and the outer shielding cylinder, and further avoids metal vapor and liquid drops from splashing on the porcelain shell by utilizing double protection, thereby realizing the protection of the porcelain shell, ensuring the strength of the porcelain shell under long-time working and prolonging the service life of the vacuum arc-extinguishing chamber.
Drawings
Fig. 1 is a front cross-sectional view of the present invention.
Fig. 2 is an enlarged view of a portion a of fig. 1 in accordance with the present invention.
Fig. 3 is an enlarged view of a portion b of fig. 1 in accordance with the present invention.
Fig. 4 is an enlarged view of a portion c of fig. 2 in accordance with the present invention.
The reference numerals include: 1. the ceramic shell, 101, an outer shielding cylinder connecting ring, 102, a plug-in ring, 2, a sealing ring, 3, a movable cover plate, 4, a movable conducting rod, 5, a corrugated pipe structure, 51, a disc-shaped circular plate, 52, a reinforcing plate, 53, an anti-deflection limiting plate, 54, an annular sealing groove, 55, a sealing ring, 6, a static cover plate, 7, a static conducting rod, 8, a coil, 9, a contact, 10, an inner shielding cylinder, 11, an outer shielding cylinder, 12, an anti-deflection guide plate, 13, a protective cover, 14, a sealing ring, 15, a heat conducting plate, 16, a heat conducting support plate, 17, a heat dissipation column, 18 and a guide sleeve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 4, a vacuum interrupter with prolonged service life comprises a porcelain shell 1 and an inner shielding cylinder 10, wherein sealing rings 2 are respectively arranged at the upper end and the lower end of the porcelain shell 1, a movable cover plate 3 is fixedly arranged at the outer end of one side sealing ring 2, a movable conducting rod 4 is movably arranged at the inner end of the movable cover plate 3, a protecting cover 13 is arranged at a step of the outer peripheral surface of the movable conducting rod 4, a corrugated pipe structure 5 is arranged between the protecting cover 13 and the movable cover plate 3, a static cover plate 6 is fixedly arranged at the outer end of the sealing ring 2 at the other side, a static conducting rod 7 is arranged at the inner end of the static cover plate 6, coils 8 are respectively arranged at the inner ends of the movable conducting rod 4 and the static conducting rod 7, contacts 9 are respectively arranged at the inner ends of the coils 8, and the inner shielding cylinder 10 is arranged on the inner wall of the porcelain shell 1.
As shown in fig. 2 and 4, the bellows structure 5 includes a disc-shaped annular plate 51, the disc-shaped annular plate 51 is sleeved on the outer wall of the movable conductive rod 4, the surface of the disc-shaped annular plate 51 is a conical surface, a bus of the conical surface of the disc-shaped annular plate 51 is a smooth curve, a plurality of disc-shaped annular plates 51 are stacked in a positive-negative staggered manner, annular sealing grooves 54 are formed in the outer ring and the inner ring of the surface of the disc-shaped annular plate 51, and sealing rings 55 are assembled in the annular sealing grooves 54 of adjacent disc-shaped annular plates 51.
The shape of the disc-shaped annular plate 51 is smaller than that of a traditional corrugated pipe due to the fact that the corrugated thin-wall bending structure is fewer, deformation of the disc-shaped annular plate 51 is smaller when the disc-shaped annular plate is subjected to pressure, and therefore the disc-shaped annular plate 51 cannot be damaged due to long-term frequent deformation and has longer service life than that of the traditional corrugated pipe.
The disc-shaped annular plate 51 is made of elastic metal, such as spring steel, so that the disc-shaped annular plate 51 has certain elasticity, and the disc-shaped annular plate 51 is deformed when being subjected to axial force to form compression or extension.
The thickness of the disc-shaped annular plate 51 is uniform, so that each position of the disc-shaped annular plate 51 has enough strength, and the stress applied to each position of the disc-shaped annular plate 51 when the disc-shaped annular plate is deformed is similar.
When the movable conductive rod 4 is in contact with the contact 9 on the static conductive rod 7, the disc-shaped annular plate 51 is in a micro-compression state, namely, the disc-shaped annular plate 51 is always in a compression state in the moving process of the movable conductive rod 4.
Because the dish-shaped annular plates 51 are stacked in a positive and negative staggered way, the sealing rings 55 are arranged between the adjacent dish-shaped annular plates 51, and the dish-shaped annular plates 51 are always in a compressed state, the sealing rings 55 can be ensured to be always clung to the annular sealing grooves 54, so that the tightness of the corrugated pipe structure 5 is ensured, and the installation mode of the positive and negative staggered way is convenient for adjusting and replacing the dish-shaped annular plates 51, and is more suitable for being installed on the movable conducting rods 4 with different length requirements.
In addition, because the disc-shaped annular plates 51 are installed in a stacking manner, when one disc-shaped annular plate 51 deflects, the whole corrugated pipe structure 5 is not easy to drive to deflect and twist, and the strength of the corrugated pipe structure 5 is further improved.
For the disc-shaped annular plate 51 with the linear bus, the main deformation positions of the disc-shaped annular plate 51 are the inner ring and the outer ring, so that the inner ring and the outer ring of the disc-shaped annular plate 51 are more easily damaged due to deformation, and finally the vacuum arc extinguishing chamber is damaged;
the bus is a smooth curve, so that all positions on the surface of the disc-shaped annular plate 51 can be deformed during compression or stretching, and the stress generated by deformation is more uniform, and therefore the disc-shaped annular plate 51 with the bus being a smooth curve has better strength, can bear more deformation, improves fatigue strength and prolongs service life.
Specifically, as shown in fig. 2, both the inner and outer ends of the tapered surface of the disk-shaped annular plate 51 are parallel planes.
The inner and outer ends of the conical surface of the disc-shaped annular plate 51 are parallel planes, so that the contact surfaces of the adjacent disc-shaped annular plates 51 are completely contacted, and the tightness is ensured.
The inclination of the surface of the disc-shaped annular plate 51 is small, so that axial deflection and distortion of the disc-shaped annular plate 51 in the deformation process are avoided, and the tightness between adjacent disc-shaped annular plates 51 is further ensured.
Specifically, the annular seal groove 54 and the seal ring 55 are in an interference fit relationship, and the thickness of the seal ring 55 is greater than twice the thickness of the annular seal groove 54, so that the air tightness between the adjacent disc-shaped annular plates 51 is ensured when the disc-shaped annular plates 51 are in a compressed state.
When the adjacent disc-shaped annular plate 51 and the seal ring 55 are installed, the disc-shaped annular plate 51 and the seal ring 55 are clamped and fixed by practical clamping equipment, so that the tightness of the disc-shaped annular plate is ensured.
Specifically, as shown in fig. 1 and 4, a reinforcing plate 52 is welded on the outer ring of the surface of the disc-shaped annular plate 51, an anti-deflection limiting plate 53 is integrally formed at the outer end of the reinforcing plate 52, anti-deflection guide plates 12 are uniformly and fixedly installed on the inner wall of the movable cover plate 3, two anti-deflection guide plates 12 are in a group, and the anti-deflection limiting plate 53 is located between one group of anti-deflection guide plates 12.
The corrugated pipe structure 5 can only perform axial compression and stretching movement through the cooperation of the deviation prevention limiting plate 53 and the deviation prevention guide plate 12, so that the corrugated pipe structure 5 can be prevented from twisting, the stability of the corrugated pipe structure 5 is further guaranteed, and the strength and the service life of the corrugated pipe structure are improved.
Specifically, as shown in fig. 1, a heat conducting plate 15 connected to the deviation preventing guide plate 12 is fixedly installed on the inner wall of the movable cover plate 3, a heat conducting support plate 16 is fixedly installed between the side wall of the deviation preventing guide plate 12 and the heat conducting plate 15, and a heat dissipation column 17 is fixedly installed on the outer wall of the movable cover plate 3.
When the vacuum arc extinguishing chamber is used for switching on and switching off short-circuit current, part of heat energy generated by an electric arc can be transferred to the corrugated pipe structure 5, the shape of the corrugated pipe structure 5 can be influenced under the action of internal pressure and heat difference stress, so that heat on the corrugated pipe structure 5 can be transferred to the movable cover plate 3 through the heat conducting support plate 16 and the heat conducting plate 15 and finally dissipated from the heat dissipation column 17, and the stability and the service life of the corrugated pipe structure are improved.
The movable cover plate 3 is made of metal materials, and can conduct heat effectively.
Specifically, as shown in fig. 1 and 3, the porcelain shells 1 are two in total, the two porcelain shells 1 are connected to form a whole, the inner surfaces of the two porcelain shells 1 are integrally formed with an outer shielding cylinder connecting ring 101, the inner end of the outer shielding cylinder connecting ring 101 is integrally formed with an outer shielding cylinder 11, the outer wall of the inner shielding cylinder 10 is integrally formed with a mounting ring, the mounting ring is inserted between the two outer shielding cylinder connecting rings 101, the inner walls of the two outer shielding cylinder connecting rings 101 are uniformly formed with an inserting ring 102, the inner wall of the outer shielding cylinder connecting ring 101 is provided with an annular groove corresponding to the inserting ring 102, the inserting ring 102 is inserted in the annular groove, and the inner end of the inserting ring 102 is provided with a sealing gasket.
The two layers of shielding barrels are arranged, double-layer protection is realized on the porcelain shell 1, and a large amount of metal vapor and liquid drops generated in the arcing process of the contact 9 are further prevented from splashing on the porcelain shell 1, so that the vacuum arc-extinguishing chamber can maintain corresponding strength under long-time working, and the service life of the vacuum arc-extinguishing chamber is prolonged.
Specifically, as shown in fig. 1, the inner diameter and height of the outer shielding cylinder 11 are larger than the outer diameter and height of the inner shielding cylinder 10, so that the outer shielding cylinder 11 can achieve better protection.
Specifically, as shown in fig. 1, a guide sleeve 18 is fixedly mounted on the upper wall of the inner end of the movable cover plate 3, and the movable conductive rod 4 is movably mounted in the guide sleeve 18.
Specifically, as shown in fig. 1, the outer wall of the movable conductive rod 4 and the outer wall of the guide sleeve 18 are both sleeved with the sealing ring 14, the lower end of the bellows structure 5 is welded between the sealing ring 14 and the protective cover 13, and the upper end of the bellows structure 5 is welded between the movable cover plate 3 and the sealing ring 14, so that the tightness of the bellows structure 5 is ensured.
The foregoing is merely exemplary of the present invention, and many variations may be made in the specific embodiments and application scope of the invention by those skilled in the art based on the spirit of the invention, as long as the variations do not depart from the gist of the invention.
Claims (7)
1. The utility model provides a vacuum interrupter of increase of service life which characterized in that: the novel ceramic shell comprises a ceramic shell body (1) and an inner shielding cylinder (10), wherein sealing rings (2) are respectively arranged at the upper end and the lower end of the ceramic shell body (1), a movable cover plate (3) is fixedly arranged at the outer end of each sealing ring (2), a movable conducting rod (4) is movably arranged at the inner end of each movable cover plate (3), a protecting cover (13) is arranged at the step of the outer peripheral surface of each movable conducting rod (4), a corrugated pipe structure (5) is arranged between each protecting cover (13) and each movable cover plate (3), a static cover plate (6) is fixedly arranged at the outer end of each sealing ring (2) at the other side, a coil (8) is arranged at the inner ends of each movable conducting rod (4) and each static conducting rod (7), a contact (9) is arranged at the inner end of each coil (8), and a static shielding cylinder (10) is arranged on the inner wall of the ceramic shell body (1);
the corrugated pipe structure (5) comprises disc-shaped annular plates (51), the disc-shaped annular plates (51) are sleeved on the outer wall of the movable conducting rod (4), the disc-shaped annular plates (51) are made of elastic metal, the surfaces of the disc-shaped annular plates (51) are conical surfaces, bus bars of the conical surfaces of the disc-shaped annular plates (51) are smooth curves, a plurality of disc-shaped annular plates (51) are stacked in a positive-negative staggered mode, each disc-shaped annular plate (51) is in a micro-compression state, annular sealing grooves (54) are formed in the outer rings and the inner rings of the surfaces of the disc-shaped annular plates (51), and sealing rings (55) are assembled in the annular sealing grooves (54) of the adjacent disc-shaped annular plates (51);
the outer ring of the surface of the disc-shaped annular plate (51) is welded with a reinforcing plate (52), the outer end of the reinforcing plate (52) is integrally formed with an anti-deflection limiting plate (53), the inner wall of the movable cover plate (3) is uniformly and fixedly provided with anti-deflection guide plates (12), two anti-deflection guide plates (12) are in a group, and the anti-deflection limiting plate (53) is positioned between one group of anti-deflection guide plates (12);
the inner wall fixed mounting of movable cover plate (3) has heat conduction board (15) of being connected with anti-deviation deflector (12), fixed mounting has heat conduction backup pad (16) between the lateral wall of anti-deviation deflector (12) and heat conduction board (15), the outer wall fixed mounting of movable cover plate (3) has heat dissipation post (17).
2. A vacuum interrupter of extended life as defined in claim 1, wherein: the inner end and the outer end of the conical surface of the disc-shaped annular plate (51) are parallel planes.
3. A vacuum interrupter of extended life as defined in claim 1, wherein: the annular sealing groove (54) and the sealing ring (55) are in interference fit, and the thickness of the sealing ring (55) is greater than twice the thickness of the annular sealing groove (54).
4. A vacuum interrupter of extended life as defined in claim 1, wherein: the ceramic shell (1) is two in total, the ceramic shell (1) is connected to form a whole, the ceramic shell (1) is two in each of which the inner surface is integrally formed with an outer shielding cylinder connecting ring (101), the inner end of each outer shielding cylinder connecting ring (101) is integrally formed with an outer shielding cylinder (11), the outer wall of each inner shielding cylinder (10) is integrally formed with a mounting ring, the mounting rings are inserted between the two outer shielding cylinder connecting rings (101), the inner walls of the outer shielding cylinder connecting rings (101) are integrally formed with inserting rings (102), annular grooves corresponding to the inserting rings (102) are formed in the inner walls of the outer shielding cylinder connecting rings (101), and the inner ends of the inserting rings (102) are assembled with sealing gaskets.
5. A vacuum interrupter of claim 4 wherein: the inner diameter and the height of the outer shielding cylinder (11) are larger than the outer diameter and the height of the inner shielding cylinder (10).
6. A vacuum interrupter of extended life as defined in claim 1, wherein: the inner upper wall of the movable cover plate (3) is fixedly provided with a guide sleeve (18), and the movable conducting rod (4) is movably assembled in the guide sleeve (18).
7. A vacuum interrupter according to claim 6, wherein: the outer wall of movable conducting rod (4) and the outer wall of uide bushing (18) have all cup jointed sealing ring (14), the lower extreme welding of bellows structure (5) is between sealing ring (14) and safety cover (13), and the upper end welding of bellows structure (5) is between movable cover board (3) and sealing ring (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311451459.9A CN117174526B (en) | 2023-11-03 | 2023-11-03 | Vacuum arc-extinguishing chamber with prolonged service life |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311451459.9A CN117174526B (en) | 2023-11-03 | 2023-11-03 | Vacuum arc-extinguishing chamber with prolonged service life |
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| CN117174526A CN117174526A (en) | 2023-12-05 |
| CN117174526B true CN117174526B (en) | 2024-01-05 |
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| CN117489291B (en) * | 2023-12-31 | 2024-04-05 | 大庆市天德忠石油科技有限公司 | Casing head with compression type sealing structure |
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| Publication number | Publication date |
|---|---|
| CN117174526A (en) | 2023-12-05 |
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