CN217272307U

CN217272307U - Low temperature valve stuffing box structure

Info

Publication number: CN217272307U
Application number: CN202220379753.8U
Authority: CN
Inventors: 方天行; 刘卫国; 王忠勇; 方建生
Original assignee: Gaopin Valve Group Co ltd
Current assignee: Gaopin Valve Group Co ltd
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2022-08-23
Anticipated expiration: 2032-02-24

Abstract

The utility model discloses a low temperature valve stuffing box structure, including the fixed metal covering of first fixed metal covering, second, the inside of first fixed metal covering is provided with first airtight cavity, the inside of the fixed metal covering of second is provided with the airtight cavity of second, the upper surface of first fixed metal covering is provided with the becket, the inside of first fixed metal covering is provided with outer axle, the internal surface of outer axle rotates and is connected with interior axle, the outer fixed surface of outer axle is connected with the sleeve, the surface of interior axle is provided with the lug, the internal surface fixed connection of first fixed metal covering is connected with the second insulating layer. The utility model discloses, through axle, outer axle, lug and becket in the design, whether the realization can observe the stuffing box structure enough inseparable, avoid the device can't use under emergency, through designing two airtight cavities, insulating layer and air chamber, realize increasing the thermal-insulated effect of stuffing box, avoid the inside medium of pipeline to receive the influence of temperature.

Description

Low temperature valve stuffing box structure

Technical Field

The utility model relates to a low temperature valve field especially relates to a low temperature valve stuffing box structure.

Background

The valve suitable for medium temperature of-40 to-196 ℃ is called as a low-temperature valve, the valve generally adopts a long-neck valve cover, and the important technical requirement of the low-temperature valve is that the packing box of the valve, namely the contact part of the packing and a valve rod, can not be frozen, once the ice is formed, the valve can not be opened and closed, the function can not be realized, and the high-temperature valve has great danger hidden danger. The valve stuffing box is a sealing device of the valve rod part. Preventing the leakage of gas, liquid material and other media.

Some existing cryogenic valve stuffing box structures have the following defects:

1. at present, a low-temperature valve stuffing box structure cannot observe whether external liquid enters or not, so that a valve cannot be closed in necessary time;

2. the present low-temperature valve stuffing box structure has poor heat preservation effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a low-temperature valve stuffing box structure.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a low-temperature valve stuffing box structure comprises a first fixed metal sleeve and a second fixed metal sleeve, wherein a first closed cavity is formed in the first fixed metal sleeve, a second closed cavity is formed in the second fixed metal sleeve, and a metal ring is arranged on the upper surface of the first fixed metal sleeve;

an outer shaft is arranged in the first fixed metal sleeve, the inner surface of the outer shaft is rotatably connected with an inner shaft, the outer surface of the outer shaft is fixedly connected with a sleeve, and the outer surface of the inner shaft is provided with a convex block;

the inner surface fixed connection of first fixed metal covering has the second insulating layer, the fixed metal covering inner surface fixed connection of second has first insulating layer, the end inner wall fixed connection of first fixed metal covering has the go-between, form the air chamber between go-between and the outer axle.

As a further description of the above technical solution:

the first closed cavity and the second closed cavity are both vacuum, and a second gasket is arranged between the first fixed metal sleeve and the second fixed metal sleeve.

As a further description of the above technical solution:

the maximum rotation angle of the inner shaft is 300 degrees, and the outer surface of the outer shaft is in threaded connection with an outer rotating wheel.

As a further description of the above technical solution:

the lug is connected with the sleeve in a sliding mode, and the upper surface of the inner shaft is in threaded connection with an inner rotating wheel.

As a further description of the above technical solution:

the first insulating layer is in contact with the second insulating layer.

As a further description of the above technical solution:

the outer surface of the connecting ring is in threaded connection with a fixing ring, and the upper surface of the fixing ring is fixedly connected with the first fixing metal sleeve.

As a further description of the above technical solution:

as a further description of the above technical solution:

the upper surface of the first gasket is in contact with the second stationary metal sleeve.

As a further description of the above technical solution:

the inner surface of the metal ring forms a groove, and the inner shaft extends to the lower side of the first fixed metal sleeve.

The utility model discloses following beneficial effect has:

1. compared with the prior art, the stuffing box structure of the low-temperature valve realizes that whether the stuffing box structure is tight enough or not can be observed by designing the inner shaft, the outer shaft, the convex block and the metal ring, and avoids the situation that the device cannot be used in emergency.

2. Compared with the prior art, this low temperature valve packing box structure through designing two airtight cavitys, insulating layer and air chamber, realizes increasing the thermal-insulated effect of packing box, avoids the inside medium of pipeline to receive the influence of temperature.

Drawings

Fig. 1 is a schematic view of an internal structure of a low-temperature valve stuffing box structure provided by the present invention;

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

fig. 3 is a structure of a low temperature valve stuffing box according to the present invention;

fig. 4 is the utility model provides an overall structure schematic diagram of low temperature valve stuffing box structure.

Illustration of the drawings:

1. a first stationary metal sleeve; 2. a first closed cavity; 3. a second stationary metal sleeve; 4. a second closed cavity; 5. a metal ring; 6. a first gasket; 7. an inner shaft; 8. an outer shaft; 9. a connecting ring; 10. a second gasket; 11. a first insulating layer; 12. an air chamber; 13. a second thermal insulation layer; 14. a fixing ring; 15. an inner runner; 16. an outer runner.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-4, the utility model provides a pair of low temperature valve stuffing box structure: including first fixed metal covering 1, the fixed metal covering 3 of second, the inside of first fixed metal covering 1 is provided with first airtight cavity 2, the airtight cavity 4 of second is the vacuum, be provided with second packing ring 10 between the fixed metal covering 3 of first fixed metal covering 1 and second, be used for thermal-insulated, the inside of the fixed metal covering 3 of second is provided with the airtight cavity 4 of second, the upper surface of first fixed metal covering 1 is provided with becket 5, the internal surface of becket 5 forms the recess, be used for depositing ponding, inspect.

The inside of first fixed metal covering 1 is provided with outer axle 8 for to the control of valve, the internal surface of outer axle 8 rotates and is connected with interior axle 7, a position for controlling the lug, change the volume of air chamber 12, interior axle 7 extends to the downside of first fixed metal covering 1, the maximum rotation angle of interior axle 7 is 300 degrees, a connection from top to bottom for outer axle 8, the outer surface threaded connection of outer axle 8 has outer runner 16, the outer surface fixed connection of outer axle 8 has the sleeve, the surface of interior axle 7 is provided with the lug, lug and sleeve sliding connection, the last surface threaded connection of interior axle 7 has interior runner 15, a control is carried out to interior axle 7.

The inner surface of the first fixed metal sleeve 1 is fixedly connected with a second heat insulation layer 13, the inner surface of the second fixed metal sleeve 3 is fixedly connected with a first heat insulation layer 11, the first heat insulation layer 11 is in contact with the second heat insulation layer 13, the bottom inner wall of the first fixed metal sleeve 1 is fixedly connected with a connecting ring 9, the outer surface of the connecting ring 9 is in threaded connection with a fixed ring 14, the upper surface of the fixed ring 14 is fixedly connected with the first fixed metal sleeve 1, the upper surface of the connecting ring 9 is provided with a first gasket 6, the upper surface of the first gasket 6 is in contact with the second fixed metal sleeve 3, and an air cavity 12 is formed between the connecting ring 9 and the outer shaft 8 and used for detecting whether the device leaks air.

The working principle is as follows: keep in close contact with between lug and the sleeve in the external world, with first fixed metal covering 1, be connected through go-between 9 and solid fixed ring 14 between the fixed metal covering 3 of second, first airtight cavity 2, the airtight cavity 4 of second, the insulating layer insulates against heat respectively with air chamber 12, when needs inspection leakproofness, pour water into on the becket 5, runner 15 in the rotation, the control lug moves down, change the volume of air chamber 12, whether the observation aquatic has the bubble, thereby judge whether can lead to the unable rotation of valve because external environment's water, clear up water after the detection is accomplished.

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 and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a low temperature valve stuffing box structure, includes first fixed metal covering (1), the fixed metal covering of second (3), its characterized in that: a first closed cavity (2) is formed in the first fixed metal sleeve (1), a second closed cavity (4) is formed in the second fixed metal sleeve (3), and a metal ring (5) is arranged on the upper surface of the first fixed metal sleeve (1);

an outer shaft (8) is arranged in the first fixed metal sleeve (1), the inner surface of the outer shaft (8) is rotatably connected with an inner shaft (7), the outer surface of the outer shaft (8) is fixedly connected with a sleeve, and the outer surface of the inner shaft (7) is provided with a lug;

the interior fixed surface of first fixed metal covering (1) is connected with second insulating layer (13), the interior fixed surface of the fixed metal covering of second (3) is connected with first insulating layer (11), the end inner wall fixedly connected with go-between (9) of first fixed metal covering (1), form air chamber (12) between go-between (9) and outer axle (8).

2. A cryogenic valve stuffing box construction according to claim 1, wherein: the first closed cavity (2) and the second closed cavity (4) are both vacuum, and a second gasket (10) is arranged between the first fixed metal sleeve (1) and the second fixed metal sleeve (3).

3. A cryogenic valve stuffing box structure according to claim 1, wherein: the maximum rotation angle of the inner shaft (7) is 300 degrees, and the outer surface of the outer shaft (8) is in threaded connection with an outer rotating wheel (16).

4. A cryogenic valve stuffing box structure according to claim 1, wherein: the lug is connected with the sleeve in a sliding mode, and the upper surface of the inner shaft (7) is connected with an inner rotating wheel (15) in a threaded mode.

5. A cryogenic valve stuffing box structure according to claim 1, wherein: the first insulating layer (11) is in contact with the second insulating layer (13).

6. A cryogenic valve stuffing box construction according to claim 1, wherein: the outer surface of the connecting ring (9) is in threaded connection with a fixing ring (14), and the upper surface of the fixing ring (14) is fixedly connected with the first fixing metal sleeve (1).

7. A cryogenic valve stuffing box structure according to claim 1, wherein: the upper surface of the connecting ring (9) is provided with a first gasket (6), and the upper surface of the first gasket (6) is in contact with the second fixed metal sleeve (3).

8. A cryogenic valve stuffing box structure according to claim 1, wherein: the inner surface of the metal ring (5) forms a groove, and the inner shaft (7) extends to the lower side of the first fixed metal sleeve (1).