CN215815647U

CN215815647U - Vacuum switch tube with built-in shielding case

Info

Publication number: CN215815647U
Application number: CN202122383647.5U
Authority: CN
Inventors: 陈绍良
Original assignee: Zhejiang Zheng Guang Vacuum Interrupters Co ltd
Current assignee: Zhejiang Zheng Guang Vacuum Interrupters Co ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-02-11
Anticipated expiration: 2031-09-29

Abstract

The utility model discloses a vacuum switch tube with a built-in shielding cover, which structurally comprises an insulating shell, wherein a movable end cover is arranged at the upper end of the insulating shell, a static end cover is arranged at the lower end of the insulating shell, a corrugated pipe is arranged on the inner wall of the movable end cover, a movable conducting rod and a static conducting rod are respectively arranged at the axial centers of the movable end cover and the static end cover, a movable contact and a static contact are respectively and fixedly arranged at the inner ends of the movable conducting rod and the static conducting rod, the shielding cover is arranged at the positions of the movable contact and the static contact in the insulating shell, the shielding cover comprises an inner heat dissipation sleeve and an outer shielding sleeve, a heat dissipation cavity is formed between the heat dissipation sleeve and the shielding sleeve, a plurality of heat conducting columns are fixedly arranged on the inner wall of the shielding sleeve, the other ends of the heat conducting columns penetrate through and extend into the heat dissipation sleeve, and heat conducting sleeves are respectively sleeved on the outer walls of the movable conducting rod and the static conducting rod.

Description

Vacuum switch tube with built-in shielding case

Technical Field

The utility model relates to the technical field of vacuum switch tubes, in particular to a vacuum switch tube with a built-in shielding cover.

Background

A vacuum switch tube, also known as a vacuum arc-extinguishing chamber, is a core component of a medium-high voltage power switch, has the main functions of rapidly extinguishing arc and inhibiting current after a medium-high voltage circuit is cut off a power supply through excellent vacuum insulativity in the tube, avoids accidents and accidents, is mainly applied to a power transmission and distribution control system of electric power, and is also applied to power distribution systems of metallurgy, mines, petroleum, chemical engineering, railways, broadcasting, communication, industrial high-frequency heating and the like. The device has the characteristics of energy conservation, material conservation, fire prevention, explosion prevention, small volume, long service life, low maintenance cost, reliable operation, no pollution and the like.

The existing vacuum switch tube has the problems of large heat productivity and slow heat dissipation when switching on and off, thereby increasing the difficulty of arc extinguishing, leading the generated electric arc to be extinguished rapidly and influencing the arc extinguishing effect.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a vacuum switch tube with a built-in shielding cover to solve the technical problems.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a built-in vacuum switch tube of shield cover, including insulating casing, insulating casing upper end has the end cover of moving and the lower extreme has quiet end cover, move the end cover inner wall and install the bellows, move end cover and quiet end cover axle center position and be equipped with respectively and move conducting rod and quiet conducting rod, move the conducting rod and the inner fixed moving contact and the static contact of being provided with respectively of quiet conducting rod, the shield cover is installed to inside position department that is located moving contact and static contact of insulating casing, the shield cover includes inboard heat dissipation cover and outside shield cover, form the hot chamber of bank between heat dissipation cover and the shield cover, shield cover inner wall is fixed and is provided with a plurality of heat conduction posts, the heat conduction post other end runs through and extends to in the heat dissipation cover, move conducting rod and quiet conducting rod outer wall and all overlap and be equipped with heat conduction cover.

The scheme has the advantages that: moving contact and static contact can make the shield cover in the divide-shut brake in-process produce higher temperature, the heat conduction post absorbs the heat in the heat dissipation cover fast and conducts the heat to the heat extraction intracavity this moment, the heat extraction chamber conducts the heat to the heat conduction cover and radiates out through the heat conduction cover, the part that the heat conduction cover inner is located in the heat dissipation cover simultaneously absorbs the heat in the heat dissipation cover with the heat conduction post synchronization, further improve the heat dispersion of heat dissipation cover, the shield cover realizes high-efficient the arranging and radiating through heat conduction post and heat conduction cover the heat that the divide-shut brake in-process produced when guaranteeing the interior vacuum degree of heat dissipation cover, effectively improve the arc extinguishing effect and the life of shield cover.

The utility model is further configured to: a plurality of through holes matched with the number of the heat conducting columns are formed in the side wall of the heat dissipation sleeve, a sealing gasket matched with the heat conducting columns is arranged in each through hole, the sealing gasket is made of silica gel materials, and the heat conducting columns are made of heat conducting carbon fibers.

The scheme has the advantages that: the sealed pad of silica gel material effectively improves the compactness of being connected between heat conduction post and the through-hole, guarantees the vacuum in the heat dissipation cover simultaneously, and wherein heat conduction post adopts heat conduction carbon fiber effectively to improve heat conductivility of heat conduction post.

The utility model is further configured to: the cross section of the heat conduction column is in a hexagonal star shape, and the inner ring of the sealing gasket is provided with a star-shaped hole matched with the heat conduction column.

The scheme has the advantages that: the heat-conducting column adopts a hexagonal star structure to effectively increase the surface area of the outer heat-absorbing surface of the heat-conducting column, and further improve the heat-absorbing efficiency of the heat-conducting column.

The utility model is further configured to: the heat conducting sleeve is made of copper, and the outer ends of the movable conducting rod and the static conducting rod are fixedly provided with connecting rings.

The scheme has the advantages that: the connecting rings are arranged to facilitate connection of the movable conducting rods and the static conducting rods with external related equipment, the heat conductivity of copper is good, the heat conducting sleeve is made of a cylinder material, and the heat conducting performance of the heat conducting sleeve is effectively improved.

The utility model is further configured to: the outer ends of the movable end cover and the static end cover are respectively provided with a heat dissipation box, the heat dissipation box is provided with a guide hole matched with the heat conduction sleeve, and the outer wall of the heat dissipation box is circumferentially and annularly provided with a plurality of heat dissipation windows.

The scheme has the advantages that: when the heat dissipation box is used, heat absorbed by the inner end of the heat conduction sleeve is conducted to the outer end, the heat dissipation window circumferentially arranged on the outer wall of the heat dissipation box dissipates heat to the heat conduction sleeve, the heat dissipation box and the heat dissipation box limit the movement of the movable conducting rod or the static conducting rod through the conducting hole, and the phenomenon of deviation of the movable conducting rod or the static conducting rod is effectively prevented.

The utility model is further configured to: insulating casing inner wall equidistance and circumference encircle and be equipped with a plurality of recesses, and the equal activity is provided with the fixture block in every recess, and fixed reset spring that is provided with between fixture block and the recess bottom surface, shielding cover outer lane ring be equipped with a plurality of draw-in grooves with the fixture block adaptation, both ends all have first inclined plane about the fixture block, the draw-in groove open end all offer with the second inclined plane of first inclined plane adaptation.

The scheme has the advantages that: the static conducting rod with different lengths can lead the contact positions of the static contact and the moving contact in the insulating shell to change, and the shield can flexibly adjust the use position according to the needs, so that the arc extinguishing effect of the shield is ensured.

The utility model is further configured to: the bottom surface all sets up the screw hole that extends to outside the insulating casing and be used for the installation fastener in every recess, and the outer opening end ring of screw hole is equipped with the concave position of holding, and the fastener includes the pole portion that is threaded connection with the screw hole and the head with the concave position adaptation of holding.

The scheme has the advantages that: when the fastener is completely screwed, the rod part supports against the clamping block and urges the clamping block to be pressed towards the clamping groove, so that the shielding case is prevented from being loosened and loosened from the clamping groove due to the action of external force, and meanwhile, the head part is positioned in the accommodating concave position, so that the appearance of the insulating shell cannot be changed, and the shielding case is more attractive.

The utility model is further configured to: the opening end of the groove is internally provided with a sealing sleeve matched with the clamping block.

The scheme has the advantages that: the sealing performance of the insulating shell is guaranteed by arranging the sealing sleeve, and the vacuum degree in the insulating shell is further guaranteed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

fig. 3 is a schematic structural view of the gasket and the heat conductive pillar.

Reference numerals: 1. an insulating housing; 100. a movable end cover; 101. a stationary end cap; 102. a bellows; 103. a movable conductive rod; 104. a static conductive rod; 105. a moving contact; 106. static contact; 107. a heat conducting sleeve; 108. a connecting ring; 2. a shield case; 200. a heat dissipation sleeve; 201. a shielding sleeve; 202. a heat removal cavity; 203. a heat-conducting column; 3. a through hole; 300. a gasket; 301. a star-shaped hole; 4. a heat dissipation box; 400. a guide hole; 401. a heat dissipation window; 5. a groove; 500. a clamping block; 501. a return spring; 502. a card slot; 503. a first inclined plane; 504. a second inclined plane; 6. a threaded hole; 600. accommodating the concave position; 601. a fastener; 602. a rod portion; 603. a head portion; 604. and (5) sealing the sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a vacuum switching tube with a built-in shield 2 according to an embodiment of the present invention includes an insulating housing 1, a movable end cap 100 is disposed at an upper end of the insulating housing 1, and a stationary end cap 101 is disposed at a lower end of the insulating housing 1, a corrugated tube 102 is mounted on an inner wall of the movable end cap 100, a movable conducting rod 103 and a stationary conducting rod 104 are respectively disposed at axial positions of the movable end cap 100 and the stationary end cap 101, a movable contact 105 and a stationary contact 106 are respectively fixedly disposed at inner ends of the movable conducting rod 103 and the stationary conducting rod 104, a shield 2 is mounted inside the insulating housing 1 at positions of the movable contact 105 and the stationary contact 106, the shield 2 includes an inner heat dissipation sleeve 200 and an outer shield 201, a heat dissipation cavity 202 is formed between the heat dissipation sleeve 200 and the shield 201, a plurality of heat conduction columns 203 are fixedly disposed on an inner wall of the shield 201, another end of the heat conduction column 203 penetrates and extends into the heat dissipation sleeve 200, and heat conduction sleeves 107 are respectively sleeved on outer walls of the movable conducting rod 103 and the stationary conducting rod 104.

When the device is used, the static conductive rod 104 and the dynamic conductive rod 103 are respectively connected with external related equipment and are connected to an external power supply, the related equipment drives the dynamic conductive rod 103 to move towards or away from one side of the static conductive rod 104, so that the dynamic contact 105 is enabled to be in contact with or disconnected from the static contact 106, and switching on and off are realized; moving contact 105 and static contact 106 can make the higher temperature of production in the shield cover 2 at the divide-shut brake in-process, heat conduction post 203 absorbs the heat in the heat dissipation cover 200 fast this moment and with heat conduction to heat extraction chamber 202 in, heat extraction chamber 202 conducts the heat to heat conduction cover 107 and through heat conduction cover 107 effluvium, the heat in the heat dissipation cover 200 is absorbed with heat conduction post 203 synchronization to the part that heat conduction cover 107 inner is located in heat dissipation cover 200 simultaneously, further improve the heat dispersion of heat dissipation cover 200, shield cover 2 realizes high-efficient the row of loosing through heat conduction post 203 and heat conduction cover 107 the heat that the divide-shut brake in-process produced when guaranteeing the vacuum in heat dissipation cover 200, effectively improve the arc extinguishing effect and the life of shield cover 2.

The side wall of the heat dissipation sleeve 200 is provided with a plurality of through holes 3 matched with the number of the heat conduction columns 203, each through hole 3 is internally provided with a sealing gasket 300 matched with the heat conduction columns 203, the sealing gasket 300 is made of silica gel, and the heat conduction columns 203 are made of heat conduction carbon fibers.

When using, the sealed pad 300 of silica gel material effectively improves the connection compactness between heat conduction post 203 and the through-hole 3, guarantees the vacuum in the heat dissipation cover 200 simultaneously, and wherein heat conduction post 203 adopts heat conduction carbon fiber effectively to improve the heat conductivility of heat conduction post 203.

The cross section of the heat conduction column 203 is in a hexagonal star shape, and the inner ring of the sealing gasket 300 is provided with a star-shaped hole 301 matched with the heat conduction column 203.

When the heat-conducting column is used, the surface area of the outer heat-absorbing surface of the heat-conducting column 203 is effectively increased by adopting a hexagonal star-shaped structure, the heat-absorbing efficiency of the heat-conducting column 203 is further improved, and the star-shaped hole 301 of the inner ring of the sealing gasket 300 is matched with the structure of the heat-conducting column 203.

The heat conducting sleeve 107 is made of copper, and the outer ends of the movable conducting rod 103 and the static conducting rod 104 are both fixedly provided with connecting rings 108.

When the heat conducting sleeve is used, the movable conducting rod 103 and the static conducting rod 104 can be conveniently connected with external related equipment through the connecting ring 108, the heat conductivity of copper is good, the heat conducting sleeve 107 is made of a cylindrical material, and the heat conducting performance of the heat conducting sleeve 107 is effectively improved.

The outer ends of the movable end cover 100 and the static end cover 101 are provided with heat dissipation boxes 4, the heat dissipation boxes 4 are provided with guide holes 400 matched with the heat conduction sleeves 107, and the outer walls of the heat dissipation boxes 4 are circumferentially provided with a plurality of heat dissipation windows 401.

When the heat dissipation device is used, the heat conduction of the inner end part of the heat conduction sleeve 107 located in the heat dissipation sleeve 200 is conducted to the outer end, the heat dissipation window 401 arranged on the outer wall of the heat dissipation box 4 in the circumferential direction dissipates heat of the heat conduction sleeve 107, the heat dissipation window and the heat dissipation box 4 limit the movement of the movable conducting rod 103 or the static conducting rod 104 through the guide hole 400, the phenomenon that the movable conducting rod 103 or the static conducting rod 104 is deviated is effectively prevented, on the other hand, the heat dissipation window 401 covers the movable conducting rod 103 and the static conducting rod 104, and the situation that a worker is scalded due to the fact that the worker mistakenly touches the higher heat conduction sleeve 107 is prevented.

A plurality of grooves 5 are formed in the inner wall of the insulating shell 1 in an equidistant and circumferential mode, a clamping block 500 is movably arranged in each groove 5, a reset spring 501 is fixedly arranged between the clamping block 500 and the bottom surface of each groove 5, a plurality of clamping grooves 502 matched with the clamping blocks 500 are formed in the outer ring of the shielding sleeve 201, first inclined planes 503 are arranged at the upper end and the lower end of the clamping block 500, and second inclined planes 504 matched with the first inclined planes 503 are arranged at the opening ends of the clamping grooves 502.

When the device is used, the outer ring of the shielding case 2 is provided with a plurality of clamping grooves 502 matched with the clamping blocks 500, and an active interval for lifting the shielding case 2 is reserved in the insulating shell 1, the static conductive rods 104 with different lengths can cause the contact positions of the static contact 106 and the movable contact 105 in the insulating shell 1 to change or deviate, for example, when the static conductive rods 104 are longer, the contact positions of the static contact 106 and the movable contact 105 are moved upwards, otherwise, the contact positions are moved downwards, when the contact positions are moved upwards, the shielding case 2 is pulled upwards and is contacted with the first inclined surface 503 below the clamping blocks 500 through the second inclined surface 504 below the clamping grooves 502 to promote the clamping blocks 500 to retract inwards, then the shielding case 2 is pulled upwards to the position of the clamping blocks 500 to the other clamping grooves 502, the clamping blocks 500 are popped up again due to the elastic reciprocating force of the return springs 501 and are clamped with the clamping grooves 502 to complete position adjustment, when the contact positions are moved downwards, the shielding case is operated reversely and the shielding case 2 is adjusted, the shield case 2 can be flexibly adjusted in use position as required.

The bottom surface in each groove 5 is provided with a threaded hole 6 which extends to the outside of the insulating shell 1 and is used for mounting a fastener 601, an opening end ring outside the threaded hole 6 is provided with a containing concave position 600, and the fastener 601 comprises a rod part 602 in threaded connection with the threaded hole 6 and a head part 603 matched with the containing concave position 600.

When the position adjusting device is used, after the position of the shielding case 2 is adjusted, the fastener 601 is screwed into the groove 5 through the threaded connection between the rod part 602 and the threaded hole 6, when the fastener 601 is completely screwed, the rod part 602 supports against the fixture block 500 and causes the fixture block 500 to be pressed towards the inside of the fixture groove 502, the shielding case 2 is prevented from loosening and falling off due to the external force action between the fixture block 500 and the fixture groove 502, and meanwhile, the head part 603 is located in the accommodating concave part 600, so that the appearance of the insulating case 1 cannot be changed, and the appearance is more attractive.

A sealing sleeve 604 matched with the fixture block 500 is arranged in the opening end of the groove 5.

When the vacuum insulation device is used, the sealing performance of the insulation shell 1 is ensured by arranging the sealing sleeve 604, and then the vacuum degree in the insulation shell 1 is ensured.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. The utility model provides a built-in vacuum switch tube of shield cover, includes insulating casing (1), its characterized in that: the insulating shell (1) is provided with a movable end cover (100) at the upper end and a static end cover (101) at the lower end, a corrugated pipe (102) is installed on the inner wall of the movable end cover (100), a movable conducting rod (103) and a static conducting rod (104) are respectively arranged at the axle center positions of the movable end cover (100) and the static end cover (101), a movable contact (105) and a static contact (106) are respectively and fixedly arranged at the inner ends of the movable conducting rod (103) and the static conducting rod (104), a shielding cover (2) is installed at the positions of the movable contact (105) and the static contact (106) inside the insulating shell (1), the shielding cover (2) comprises a radiating sleeve (200) and an outer shielding sleeve (201) at the inner side, a heat discharging cavity (202) is formed between the radiating sleeve (200) and the shielding sleeve (201), a plurality of heat conducting columns (203) are fixedly arranged on the inner wall of the shielding sleeve (201), and the other ends of the heat conducting columns (203) penetrate through and extend into the radiating sleeve (200), and heat conducting sleeves (107) are sleeved on the outer walls of the movable conducting rod (103) and the static conducting rod (104).

2. The vacuum switching tube with a built-in shield shell according to claim 1, characterized in that: a plurality of through holes (3) matched with the number of the heat conducting columns (203) are formed in the side wall of the heat dissipation sleeve (200), each through hole (3) is internally provided with a sealing gasket (300) matched with the heat conducting columns (203), the sealing gasket (300) is made of silica gel, and the heat conducting columns (203) are made of heat conducting carbon fibers.

3. The vacuum switching tube with a built-in shield shell according to claim 2, characterized in that: the cross section of the heat conduction column (203) is in a hexagonal star shape, and the inner ring of the sealing gasket (300) is provided with a star-shaped hole (301) matched with the heat conduction column (203).

4. The vacuum switching tube with a built-in shield shell according to claim 1, characterized in that: the heat conduction sleeve (107) is made of copper, and the outer ends of the movable conducting rod (103) and the static conducting rod (104) are both fixedly provided with connecting rings (108).

5. The vacuum switching tube with a built-in shield shell according to claim 1, characterized in that: move end cover (100) and quiet end cover (101) outer end and all be provided with heat dissipation box (4), guide hole (400) with heat conduction cover (107) adaptation are seted up in heat dissipation box (4), heat dissipation box (4) outer wall circumference ring is equipped with a plurality of heat dissipation windows (401).

6. The vacuum switching tube with a built-in shield shell according to claim 1, characterized in that: insulating casing (1) inner wall equidistance and circumference encircle and are equipped with a plurality of recesses (5), every equal activity is provided with fixture block (500) in recess (5), fixed reset spring (501) that is provided with between fixture block (500) and recess (5) bottom surface, shielding cover (201) outer lane ring be equipped with a plurality of with draw-in groove (502) of fixture block (500) adaptation, both ends all have first inclined plane (503) about fixture block (500), second inclined plane (504) with first inclined plane (503) adaptation are all seted up to draw-in groove (502) open end.

7. The vacuum switching tube with a built-in shield shell according to claim 6, characterized in that: every the bottom surface all offer in recess (5) extend to outside insulating casing (1) and be used for installing screw hole (6) of fastener (601), screw hole (6) outer opening end ring is equipped with holding concave position (600), fastener (601) including with screw hole (6) be threaded connection's pole portion (602) and with head (603) of holding concave position (600) adaptation.

8. The vacuum switching tube with a built-in shield shell according to claim 6, characterized in that: and a sealing sleeve (604) matched with the clamping block (500) is arranged in the opening end of the groove (5).