CN211083608U

CN211083608U - SF6 gas sealing assembly

Info

Publication number: CN211083608U
Application number: CN201921985423.8U
Authority: CN
Inventors: 陆新永; 赵普志
Original assignee: Zhongzhi Environmental Technology Research Institute Nanjing Co ltd
Current assignee: Zhongzhi (Jiangsu) General Technology Co.,Ltd.
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-07-24
Anticipated expiration: 2029-11-15

Abstract

The utility model discloses a gaseous seal assembly of SF6 especially relates to SF6 gas seal technical field, including sealed tube and gas holder, the gas holder is total two, and two gas holder symmetries are fixed in the middle of the both ends about the sealed tube, and the gas holder includes screw rod, piston and gas-supply pipe, and piston sliding connection is inside the gas holder. Through rotating the screw rod, can make the piston horizontal slip, along with the piston when moving toward the sealed tube direction, can push away the air in the gas holder in the sealed ball, make the sealed ball inflated and be globular, thereby play the effect of shutoff sealed tube, like this when the decline of sealing ring leakproofness, sealed ball in the sealed tube can also play sealed effect, make and improve the leakproofness, solve current SF6 gas seal subassembly and singly adopt the sealing ring to improve the leakproofness effect between SF6 gas storage tank and the valve too poor, and the problem that the leakproofness between SF6 gas storage tank and the valve can reduce after the sealing ring ageing deformation.

Description

SF6 gas sealing assembly

Technical Field

The utility model relates to a SF6 gas seal technical field especially relates to a gaseous seal assembly of SF 6.

Background

The sulfur hexafluoride is a colorless, odorless, nontoxic and noncombustible stable gas, the molecular weight of the sulfur hexafluoride is 146.07, the density is 6.1kg/m3 at 20 ℃ and 0.1MPA and is about 5 times of the air density, the sulfur hexafluoride is gaseous at normal temperature and normal pressure, the critical temperature is 45.6 ℃, the temperature of a triple point is-50.8 ℃, the temperature of a sublimation point at normal pressure is-63.8 ℃, the molecular structure of the sulfur hexafluoride is arranged in an octahedron shape, the bonding distance is small, the bonding energy is high, the stability is high, and the sulfur hexafluoride is similar to the compatibility of an electrical structure material and nitrogen when the temperature does not exceed 180 ℃.

At present, the sealing assembly for SF6 gas generally seals the SF6 gas storage tank and the valve through the sealing ring, the sealing effect is poor when the sealing ring is adopted to improve the sealing performance between the SF6 gas storage tank and the valve, and after the sealing ring is aged and deformed, the sealing performance between the SF6 gas storage tank and the valve is reduced, so that the SF6 gas leakage phenomenon is caused.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is overcome prior art's defect, provide a gaseous seal assembly of SF6, solved current SF6 gas seal assembly and singly adopted the sealing ring to improve leakproofness effect between SF6 gas holding vessel and the valve too poor, the problem that the leakproofness between SF6 gas holding vessel and the valve can reduce after the ageing deformation of sealing ring moreover.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a gaseous seal assembly of SF6, includes sealed tube and gas holder, the gas holder is total two, two the gas holder symmetry is fixed in the middle of the left and right ends of sealed tube, the gas holder includes screw rod, piston and gas-supply pipe, piston sliding connection is inside the gas holder, the screw rod passes through the bearing and rotates the connection and is in the one end that the sealed tube was kept away from to the piston, the one end that the sealed tube was kept away from to the gas holder is opened there is the screw, the screw rod other end extends the screw with the screw rotates to be connected, gas-supply pipe fixed connection is in the gas holder is close to the one end of sealed tube, the gas-supply pipe tail end runs through to the sealed tube is inside, two about two in the gas holder two connect the four-way pipe that is cross structure between the gas-way pipe, one end, far away from the four-way pipe, of each connecting ring is connected with a connecting pipe, a sealing ball is arranged at the tail of each connecting pipe, one end, close to the connecting pipe, of each sealing ball penetrates through a penetrating pipe, the head end of each penetrating pipe penetrates into the sealing ball, annular sealing gaskets are connected at the head end and the tail end of each penetrating pipe, and the annular sealing gaskets at the tail end are connected with the connecting pipes.

Preferably, the upper end and the lower end of the sealing pipe are tightly attached with sealing rings, each gas pipe is externally sleeved with a sealing sleeve, the sealing sleeves are embedded into the sealing pipes, and the sealing sleeves are embedded into the gas storage tank.

Preferably, the other end of the screw is connected with a knob.

Preferably, the head end of the gas pipe penetrates into the gas storage tank to be communicated with the gas storage tank, the tail end of the gas pipe is communicated with the four-way pipe, the four-way pipe is communicated with the connecting ring, the connecting ring is communicated with the connecting pipe, the connecting pipe is communicated with the annular sealing gasket, and the annular sealing gasket is communicated with the penetrating pipe.

Preferably, the annular sealing gasket at the tail end is tightly attached to the outer wall of the sealing ball, and the annular sealing gasket at the head end is tightly attached to the inner wall of the sealing ball.

Preferably, the sealing ball is of a hollow structure, is made of rubber, and is attached to the sealing pipe.

Compared with the prior art, the utility model discloses the beneficial effect who realizes: according to the sealing assembly for the SF6 gas, the piston can slide left and right by rotating the screw rod, and along with the movement of the piston towards the direction of the sealing pipe, air in the air storage tank can be pushed into the sealing ball, so that the sealing ball is inflated into a ball shape, and the sealing pipe is blocked, and thus, after the sealing performance of the sealing ring is reduced, the sealing ball in the sealing pipe can also play a role in sealing, and the sealing performance is improved; when the ball sealer was inflated and is the spheroid or the gassing is the shrivelled state, through the annular seal gasket at connecting pipe head and tail both ends, can improve the leakproofness between ball sealer and the connecting pipe, prevent the phenomenon of air leakage.

Drawings

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

FIG. 2 is an enlarged view of a portion A of the ball sealer of FIG. 1;

fig. 3 is a schematic view of the overall non-sealing state of the present invention.

In the figure: 1-sealing pipe, 2-sealing ring, 3-knob, 4-gas storage tank, 5-screw, 6-screw hole, 7-piston, 8-gas pipe, 9-sealing sleeve, 10-four-way pipe, 11-sealing ball, 12-connecting ring, 13-connecting pipe, 14-annular sealing gasket and 15-penetrating pipe.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

As shown in fig. 1 to 3, a SF6 gas sealing assembly comprises a sealing pipe 1 and two gas storage tanks 4, wherein the two gas storage tanks 4 are symmetrically fixed between the left end and the right end of the sealing pipe 1, each gas storage tank 4 comprises a screw rod 5, a piston 7 and a gas pipe 8, the piston 7 is slidably connected inside the gas storage tank 4, the screw rod 5 is rotatably connected to one end of the piston 7 far away from the sealing pipe 1 through a bearing, one end of the gas storage tank 4 far away from the sealing pipe 1 is provided with a screw hole 6, the other end of the screw rod 5 extends out of the screw hole 6 to be rotatably connected with the screw hole 6, the gas pipe 8 is fixedly connected to one end of the gas storage tank 4 close to the sealing pipe 1, the tail end of the gas pipe 8 penetrates into the sealing pipe 1, two gas storage tanks 4 on the left side and the right side are connected with a four-way pipe 10 in a cross structure between the tail, the upper end and the lower end of the four-way pipe 10 are both connected with connecting rings 12 through screws, one end of each connecting ring 12, which is far away from the four-way pipe 10, is connected with a connecting pipe 13, the tail part of each connecting pipe 13 is provided with a sealing ball 11, one end of each sealing ball 11, which is close to the connecting pipe 13, is provided with a penetrating pipe 15 in a penetrating way, the head end of the penetrating pipe 15 penetrates into the sealing ball 11, the head end and the tail end of the penetrating pipe 15 are both connected with annular sealing gaskets 14, the annular sealing gaskets 14 at the tail end are connected with the connecting pipe 13, the head end of the gas pipe 8 penetrates into the gas storage tank 4 to be communicated with the gas storage tank 4, the tail end of the gas pipe 8 is communicated with the four-way pipe 10, the four-way pipe 10 is communicated with the connecting rings 12, the connecting rings 12 are communicated with the connecting pipe 13, the connecting pipe 13, the annular sealing gasket 14 at the tail end is tightly attached to the outer wall of the sealing ball 11, the annular sealing gasket 14 at the head end is tightly attached to the inner wall of the sealing ball 11, the inside of the sealing ball 11 is of a hollow structure, the sealing ball 11 is made of rubber, the sealing ball 11 is attached to the sealing tube 1, the screw 5 is rotated clockwise, along with the clockwise threaded fit of the screw 5 and the screw hole 6 in the air storage tank 4, the screw 5 moves towards the sealing tube 1 while rotating clockwise, so that the piston 7 is pushed to slide towards the sealing tube 1 in the air storage tank 4, along with the sliding of the piston 7 towards the sealing tube 1, the air in the air storage tank 4 is pushed into the four-way tube 10 along the air pipe 8, and then the air is ejected from the connecting ring 12 along the four-way tube 10, so that the air is discharged into the sealing ball 11 along the connecting ring 12, the connecting tube 13, the annular sealing gasket 14 and, make the ball sealer 11 inflated and be globular, along with being globular ball sealer 11 pastes with 1 inner wall of gland packing, and play the effect of shutoff gland packing 1, like this when the decline of sealing ring 2 leakproofness, ball sealer 11 in the gland packing 1 can also play sealed effect for improve the leakproofness.

On the contrary, when the screw rod 5 is rotated counterclockwise, along with the counterclockwise thread fit of the screw rod 5 and the screw hole 6 in the air storage tank 4, the screw rod 5 moves in the opposite direction of the sealing tube 1 while rotating counterclockwise, and then the piston 7 is pulled to slide in the opposite direction of the sealing tube 1 in the air storage tank 4, along with the sliding of the piston 7 in the opposite direction of the sealing tube 1, the air in the sealing ball 11 is pumped into the air storage tank 4 along the through tube 15, the annular sealing gasket 14, the connecting tube 13, the connecting ring 12, the four-way tube 10 and the air pipe 8, so that the sealing ball 11 is pumped into a dry-shrived state, and the sealing ball 11 in the dry-shrived state is not attached to the inner wall of the sealing tube 1 any more, and thus the sealing tube 1.

When the sealing ball 11 is inflated to be a ball or deflated to be a shriveled state, the sealing performance between the sealing ball 11 and the connecting pipe 13 can be improved through the annular sealing gaskets 14 at the head and the tail ends of the connecting pipe 13, and the phenomenon of air leakage is prevented.

As shown in fig. 1 to 3, it is better that the upper and lower both ends of the seal pipe 1 are tightly attached with the seal rings 2, each seal sleeve 9 is sleeved outside the gas pipe 8, the seal sleeve 9 is embedded in the seal pipe 1, the seal sleeve 9 is embedded in the gas storage tank 4, the seal pipes 1 and SF6 can be respectively sealed by the upper and lower seal rings 2, and the seal pipes 8 and the seal pipes 1 and the gas storage tank 4 can be respectively sealed by the seal sleeve 9.

As shown in fig. 1 to 3, preferably, the other end of the screw 5 is connected to a knob 3, and by rotating the knob 3, it is more convenient for a user to rotate the screw 5 when the screw 5 needs to be rotated clockwise or counterclockwise.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a SF6 gaseous seal assembly, includes sealed tube and gas holder, its characterized in that:

the gas holder is two in total, two gas holders are symmetrically fixed in the middle of the left end and the right end of the sealing pipe, each gas holder comprises a screw rod, a piston and a gas pipe, the piston is slidably connected inside the gas holder, the screw rod is rotatably connected to one end, far away from the sealing pipe, of the piston through a bearing, one end, far away from the sealing pipe, of the gas holder is provided with a screw hole, the other end of the screw rod extends out of the screw hole to be rotatably connected with the screw hole, the gas pipe is fixedly connected to one end, close to the sealing pipe, of the gas holder, the tail end of the gas pipe penetrates through the sealing pipe, the left end and the right end of the two gas pipes in the gas holders are connected with a cross-shaped four-way pipe between the tail ends, the upper end and the lower end of the four, each connecting pipe tail is provided with a sealing ball, one end of each sealing ball, which is close to the connecting pipe, is provided with a penetrating pipe in a penetrating way, the head end of the penetrating pipe penetrates into the sealing ball, the head end and the tail end of the penetrating pipe are both connected with annular sealing gaskets, and the annular sealing gaskets at the tail end are connected with the connecting pipe.

2. A SF6 gas seal assembly as in claim 1, wherein: the sealing device is characterized in that the upper end and the lower end of the sealing pipe are tightly attached with sealing rings, each sealing sleeve is sleeved outside the gas pipe, the sealing sleeves are embedded into the sealing pipes, and the sealing sleeves are embedded into the gas storage tank.

3. A SF6 gas seal assembly as in claim 1, wherein: the other end of the screw rod is connected with a knob.

4. A SF6 gas seal assembly as in claim 1, wherein: the head end of the gas pipe penetrates into the gas storage tank to be communicated with the gas storage tank, the tail end of the gas pipe is communicated with the four-way pipe, the four-way pipe is communicated with the connecting ring, the connecting ring is communicated with the connecting pipe, the connecting pipe is communicated with the annular sealing gasket, and the annular sealing gasket is communicated with the penetrating pipe.

5. A SF6 gas seal assembly as in claim 1, wherein: the annular sealing gasket at the tail end is tightly attached to the outer wall of the sealing ball, and the annular sealing gasket at the head end is tightly attached to the inner wall of the sealing ball.

6. A SF6 gas seal assembly as in claim 1, wherein: the sealing ball is internally of a hollow structure and made of rubber, and the sealing ball is attached to the sealing pipe.