CN214367767U

CN214367767U - Stop valve for ultra-low temperature deep cooling

Info

Publication number: CN214367767U
Application number: CN202120190373.5U
Authority: CN
Inventors: 张晓秋; 夏胜建; 全军; 吴静; 邵龙
Original assignee: Baoyi Group Co ltd
Current assignee: Baoyi Group Co ltd
Priority date: 2021-01-23
Filing date: 2021-01-23
Publication date: 2021-10-08
Anticipated expiration: 2031-01-23

Abstract

The utility model belongs to the technical field of the valve, concretely relates to stop valve for ultra-low temperature cryrogenic. The utility model discloses set up the sealed face of toper of mutually supporting between the protruding ring portion of valve rod and valve gap inner wall, when the valve is opened entirely, the sealed face of two toper contacts together, plays sealed effect, reduces the erosion of fluid to packing, prolongs the life that packs, sets up this seal structure in the bottom region that is close to packing simultaneously, has avoided the regional expanded danger of vaporization of enclosure space, and the sealed face of toper can ensure seal structure and valve rod axiality in less error range.

Description

Stop valve for ultra-low temperature deep cooling

Technical Field

The utility model belongs to the technical field of the valve, concretely relates to stop valve for ultra-low temperature cryrogenic.

Background

The low-temperature stop valve refers to a valve with a valve clack for low-temperature media moving along the center line of a valve seat. Usually, a sealing structure for a valve rod in a stop valve is usually sealed by adopting a packing, but under the action of fluid, the packing has a short service life and is easy to leak.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects and shortcomings existing in the prior art and providing a stop valve for ultra-low temperature deep cooling.

The utility model discloses the technical scheme who takes as follows: a stop valve for ultralow temperature deep cooling comprises a valve body, a valve clack, a valve rod, a valve cover and a valve rod driving device, wherein the valve body is connected with the valve cover, the valve rod penetrates through the valve cover to be connected with the valve clack, the valve cover extends upwards to form a lengthened extension part arranged outside the valve rod, a convex ring part in clearance fit with the lengthened extension part is arranged on the inner wall of the lengthened extension part close to the upper end of the lengthened extension part, a packing cavity is formed between the inner wall of the lengthened extension part from the convex ring part to the upper end part of the lengthened extension part and the valve rod, packing is arranged in the packing cavity, a packing gland is arranged at the upper end of the packing, a pressing plate is arranged at the upper end of the packing gland, and the pressing plate is fixedly connected with the valve cover; the valve rod is provided with a first conical sealing surface, the lower end part of the convex ring part is provided with a conical sealing groove, the inner surface of the conical sealing groove forms a second conical sealing surface, and when the valve rod is in a fully-open position, the first conical sealing surface and the second conical sealing surface form a surface contact sealing structure.

The upper end of the lengthened extension part is hinged with at least two screw rods, the pressing plate is provided with a through hole for the screw rods, the screw rods are in threaded connection with nuts, and the nuts form a fastening effect on the pressing plate.

And a pre-tightening elastic piece is arranged between the nut and the pressing plate.

The pressing plate is provided with a pre-tightening elastic part limiting groove, and the pre-tightening elastic part is limited in the pre-tightening elastic part limiting groove.

The pre-tightening elastic piece is a butterfly combined spring and is sleeved outside the screw rod.

The valve clack overcoat is equipped with the uide bushing, the uide bushing forms full stroke guide effect to the uide bushing.

The guide sleeve is provided with a limiting ring which protrudes outwards, and the limiting ring is limited at the joint of the valve body and the valve cover.

The valve body and the valve cover are respectively provided with a matched limiting ring groove corresponding to the limiting ring, and sealing gaskets are arranged between the lower end surface of the limiting ring and the valve body and between the upper end surface of the limiting ring and the valve cover.

The utility model has the advantages as follows: the utility model discloses set up the sealed face of toper of mutually supporting between the protruding ring portion of valve rod and valve gap inner wall, when the valve is opened entirely, the sealed face of two toper contacts together, plays sealed effect, reduces the erosion of fluid to packing, prolongs the life that packs, sets up this seal structure in the bottom region that is close to packing simultaneously, has avoided the regional expanded danger of vaporization of enclosure space, and the sealed face of toper can ensure seal structure and valve rod axiality in less error range.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced 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 obtained from these drawings still belong to the scope of the present invention without inventive laboriousness.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a view of the structure of region I in FIG. 2 when the valve is in a fully open state;

FIG. 4 is an enlarged view of portion B of FIG. 1;

in the figure, 1, a valve body; 2, a valve clack; 3, a valve rod; 301, a first conical sealing surface; 4, a valve cover; 401, lengthening the extension; 402, a convex ring portion; 403, a second conical sealing surface; 404, a screw; 5, filling; 6, a packing gland; 7, pressing a plate; 701, pre-tightening an elastic part limiting groove; 8, a nut; 9, pre-tightening the elastic piece; 10, a guide sleeve; 1001, a stop collar; 11, a sealing gasket; 12, a valve stem driving device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it is understood that "first" and "second" are only used for convenience of expression and should not be construed as limitations to the embodiments of the present invention, and the following embodiments do not describe the embodiments one by one.

The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the invention.

A stop valve for ultra-low temperature deep cooling comprises a valve body 1, a valve clack 2, a valve rod 3, a valve cover 4 and a valve rod driving device 12, wherein the valve body 1 is connected with the valve cover 4, the valve rod 3 penetrates through the valve cover 4 to be connected with the valve clack 2, the valve cover 4 extends upwards to form a lengthening extension part 401 arranged outside the valve rod 3, a convex ring part 402 in clearance fit with the lengthening extension part 401 is arranged on the inner wall of the lengthening extension part 401 close to the upper end, a packing cavity is formed between the inner wall of the lengthening extension part 401 from the convex ring part 402 to the upper end part of the lengthening extension part 401 and the valve rod 3, packing 5 is arranged in the packing cavity, a packing gland 6 is arranged at the upper end of the packing 5, a pressing plate 7 is arranged at the upper end of the packing gland 6, and the pressing plate 7 is fixedly connected with the valve cover 4; the valve rod 3 is provided with a first conical sealing surface 301, the lower end part of the convex ring part 402 is provided with a conical sealing groove, the inner surface of the conical sealing groove forms a second conical sealing surface 403, as shown in fig. 3, when the valve rod 1 is in a fully open position, the first conical sealing surface 301 and the second conical sealing surface 403 form a surface contact sealing structure. When the valve is fully opened, the first conical sealing surface 301 and the second conical sealing surface 403 form a surface contact sealing structure, so that the erosion effect of fluid on the packing can be reduced, the sealing structure is arranged in the bottom area close to the packing, the risk of vaporization expansion of a closed space area is effectively avoided, and the conical sealing surface can ensure that the coaxiality of the sealing structure and the valve rod is within a small error range.

The upper end part of the lengthened extension part 401 is hinged with at least two screws 404, a through hole for the screws 404 is formed in the pressing plate 7, a nut 8 is connected to the screws 404 in a threaded mode, and the nut 8 plays a fastening role on the pressing plate 7.

And a pre-tightening elastic piece 9 is arranged between the nut 8 and the pressure plate 7. The action of the pretensioning spring 9 reinforces the tightening action of the nut 8 and the extent of the filling.

The pressing plate 7 is provided with a pre-tightening elastic part limiting groove 701, and the pre-tightening elastic part 9 is limited in the pre-tightening elastic part limiting groove 701. The pre-tightening elastic part limiting groove 701 has a limiting effect on the pre-tightening elastic part 9, so that the pre-tightening elastic part 9 is prevented from deviating.

The pre-tightening elastic element 9 is a butterfly-shaped combined spring, and is sleeved outside the screw rod 404.

As shown in fig. 3, a guide sleeve 10 is sleeved outside the valve flap 2, and the guide sleeve 10 performs a full-stroke guiding function on the guide sleeve 10.

The outer periphery of the guide sleeve 10 protrudes outwards to form a limiting ring 1001, and the limiting ring 1001 is limited at the joint of the valve body 1 and the valve cover 4. The guide sleeve 10 is assembled while the valve body 1 and the valve cover 4 are connected, and other structures can be adopted to fix the guide sleeve 10, for example, connecting structures such as threads and bolts are adopted to fix the guide sleeve on the valve body 1 or the valve cover 4, so that the relative structure and the assembling mode are more complicated.

The valve body 1 and the valve cover 4 are respectively provided with a matched limiting ring groove corresponding to the limiting ring 1001, and sealing gaskets 11 are respectively arranged between the lower end surface of the limiting ring 1001 and the valve body 1 and between the upper end surface of the limiting ring 1001 and the valve cover 4. The double-sealing gasket structure effectively avoids leakage at the joint.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. The utility model provides an ultra-low temperature is stop valve for cryrogenic, includes valve body (1), valve clack (2), valve rod (3), valve gap (4), valve rod drive arrangement (12), valve body (1) is connected with valve gap (4), valve rod (3) pass valve gap (4) and connect valve clack (2), valve gap (4) upwards extend and form extension portion (401) of extension that set up outside valve rod (3), extension portion (401) are close the inner wall of upper end and are equipped with and extend extension portion (401) clearance fit's protruding ring portion (402), protruding ring portion (402) form the packing chamber to between extension portion (401) inner wall of the part of the upper end of extension portion (401) and valve rod (3), the packing intracavity is equipped with filler (5), filler (5) upper end is equipped with gland (6), gland (6) upper end is equipped with clamp plate (7), the pressing plate (7) is fixedly connected with the valve cover (4); the method is characterized in that: be equipped with sealed face (301) of first toper on valve rod (3), tip is equipped with the toper seal groove under protruding ring portion (402), toper seal groove internal surface forms the sealed face (403) of second toper, when valve rod (3) are for opening the position fully, the sealed face (301) of first toper and the sealed face (403) of second toper form face contact seal structure.

2. The stop valve for ultra-low temperature cryogenic cooling according to claim 1, characterized in that: the upper end of the lengthened extension part (401) is hinged with at least two screws (404), a through hole for the screws (404) is formed in the pressing plate (7), a nut (8) is connected to the screws (404) in a threaded mode, and the nut (8) plays a role in fastening the pressing plate (7).

3. The stop valve for ultra-low temperature deep cooling according to claim 2, characterized in that: and a pre-tightening elastic piece (9) is arranged between the nut (8) and the pressure plate (7).

4. The stop valve for ultra-low temperature deep cooling according to claim 3, characterized in that: the pressing plate (7) is provided with a pre-tightening elastic part limiting groove (701), and the pre-tightening elastic part (9) is limited in the pre-tightening elastic part limiting groove (701).

5. The stop valve for ultra-low temperature deep cooling according to claim 3, characterized in that: the pre-tightening elastic piece (9) is a butterfly combined spring and is sleeved outside the screw rod (404).

6. The stop valve for ultra-low temperature cryogenic cooling according to claim 1, characterized in that: the valve clack (2) overcoat is equipped with uide bushing (10), uide bushing (10) form full stroke guide effect to uide bushing (10).

7. The stop valve for ultra-low temperature deep cooling according to claim 6, characterized in that: the outer periphery of the guide sleeve (10) protrudes outwards to form a limiting ring (1001), and the limiting ring (1001) is limited at the joint of the valve body (1) and the valve cover (4).

8. The stop valve for ultra-low temperature deep cooling according to claim 7, characterized in that: valve body (1) and valve gap (4) correspond spacing ring (1001) and are equipped with the spacing annular of a looks adaptation respectively, all be equipped with seal gasket (11) between the lower terminal surface of spacing ring (1001) and valve body (1) and between the upper end surface of spacing ring (1001) and valve gap (4).