CN214274503U

CN214274503U - Spherical sealing high-pressure bellows stop valve without gasket packing

Info

Publication number: CN214274503U
Application number: CN202120196092.0U
Authority: CN
Inventors: 程强; 钱勇; 王飞; 吴俐伶; 袁永喜; 谢洋
Original assignee: Anhui Tunxi High Pressure Valve Co ltd
Current assignee: Anhui Tunxi High Pressure Valve Co ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-09-24
Anticipated expiration: 2031-01-25

Abstract

The utility model discloses a spherical sealing high-pressure bellows stop valve without gasket packing, which relates to a valve, a valve clack is arranged in the valve body, the top of the valve clack is connected with a valve rod, a bellows is sleeved on the valve rod, the bottom end of the bellows is connected with the top of the valve clack, the top of the bellows is connected with an upper bellows tube seat, the outer side of the bellows is sleeved with a valve cover with the bottom connected with the valve body through lip welding, the bottom end of the upper bellows tube seat is inserted into the valve cover and is connected with the bellows in a sealing way, a gland nut sleeved on the valve rod is arranged right above the upper bellows tube seat, the lower part of the gland nut is sleeved on the outer wall of the valve cover and is in threaded connection with the valve cover, the inner wall part of the gland nut is in threaded connection with the outer wall of the valve rod, a gland nut is also arranged right above the gland nut, and the lower part of the gland nut is sleeved on the upper part of the gland nut and is in threaded connection with the lower part of the valve rod; the utility model discloses can effectively improve the application range of valve, valve body and valve gap adopt the lip to weld the connection simultaneously, have improved the reuse nature of equipment.

Description

Spherical sealing high-pressure bellows stop valve without gasket packing

Technical Field

The utility model relates to a valve specifically is a spherical seal high pressure bellows stop valve that no gasket packed.

Background

The corrugated stop valve is mainly used for industrial pipelines with special media such as inflammable, explosive, toxic, strong permeability, nuclear radiation and the like and under severe working conditions due to the structural characteristics of the corrugated stop valve. Because it has double sealing of metal bellows and filler, and no leakage point, it has been widely used in petrochemical industry, nuclear power, polyester chemical fiber, pharmacy, aerospace industry, etc. In recent years, high-pressure bellows stop valves are used more and more widely with the enhancement of environmental awareness.

In the prior art, if connecting pipes are required to be arranged at two ends of a valve body of the corrugated pipe stop valve, the connecting pipes are generally connected in a welding mode, so that the connecting pipes at the two ends of the valve body are required to be cut off and welded again under the condition of changing the size of a pipeline, the method is long in replacing time, and more resources are wasted. Usually, a valve body and a valve cover of the corrugated pipe stop valve are connected through bolts, and a gasket is sealed, so that the cost is high, and the leakage is easily caused. The valve cap is provided with the filler and then directly compressed by the valve rod nut, so that the valve rod nut is easy to loosen under a high-pressure working condition, and the filler is leaked. The valve body and the valve clack are generally sealed by conical surfaces, the conical surface sealing has high requirements on the processing technology of parts, and leakage of a sealing surface can be caused by carelessness. In order to better meet the market demands and widely popularize the corrugated pipe technology, the design optimizes the structure of the common corrugated pipe stop valve and keeps the special performance of the corrugated pipe valve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a spherical seal high pressure bellows stop valve that no gasket packed to solve the relatively poor technical problem of stop valve leakproofness among the prior art.

The utility model discloses a realize through following technical scheme:

a spherical sealing high-pressure corrugated pipe stop valve without gasket packing comprises a valve body, wherein two ends of the valve body are respectively provided with a medium inflow and outflow channel, the medium inflow and outflow channels are connected through a start-stop channel in the valve body, the axes of the two medium inflow and outflow channels are parallel to each other and are not intersected with each other, a valve clack is arranged right above the start-stop channel, a hemispherical body which protrudes downwards and is used for opening and closing the start-stop channel is arranged at the center of the bottom of the valve clack, a valve rod is connected to the center of the top of the valve clack, a corrugated pipe is sleeved on the valve rod, the bottom end of the corrugated pipe is hermetically connected with the top of the valve clack, a valve cover is sleeved outside the corrugated pipe, the bottom end of the valve cover is hermetically connected with the valve body, an upper corrugated pipe seat sleeved on the valve rod is arranged right above the valve cover, the bottom end of the upper corrugated pipe seat is inserted into the valve cover and is hermetically connected with the corrugated pipe, and the upper part of the upper corrugated pipe seat is erected on the top of the valve cover, a gland nut is arranged right above the upper corrugated pipe seat and sleeved on the valve rod, the lower portion of the gland nut is sleeved on the outer wall of the valve cover and in threaded connection with the valve cover, the inner wall portion of the gland nut is in threaded connection with the outer wall of the valve rod, a gland nut is further arranged right above the gland nut and sleeved on the valve rod, the lower portion of the gland nut is sleeved on the upper portion of the gland nut and in threaded connection with the gland nut, and a hand wheel is fixedly arranged at the top of the valve rod.

Furthermore, the outer ends of the two medium inflow and outflow channels are the same in structure and are both connecting ends, the connecting ends are hollow cylindrical structures, the outer walls of the connecting ends are threaded, the inner walls of the connecting ends are first conical surfaces, the inner diameters of the connecting ends gradually decrease from outside to inside, the outer sides of the connecting ends are provided with connecting pipes, the connecting pipes are integrated structures formed by an external connecting section, a platform section, a sealing section and an insertion section, the outer wall of the insertion section is a second conical surface which is the same as the first conical surface and is arranged in the inner cavity of the connecting ends, the outer diameter of the thick end of the insertion section is the same as the outer diameter of the sealing section, the sealing section is sleeved with a gasket, the outer diameter of the gasket is smaller than the outer diameter of the connecting ends, the outer diameter of the platform section is equal to the outer diameter of the connecting ends and is larger than the outer diameter of the external connecting sections, the external connecting nuts are sleeved on the external connecting sections, and the inner diameters of the parts of the connecting nuts sleeved on the external sections are the same as the outer diameters of the external sections, the inner diameter of the part of the connecting rod facing the connecting end is the same as the outer diameter of the connecting end and is sleeved on the outer side of the connecting end, and the connecting end are in threaded connection.

Further, be provided with rather than spacing step as an organic whole on the outer wall of valve gap, be in the valve gap below the part insert in the valve body and with valve body inner wall threaded connection, the groove of erectting that is used for erectting spacing step and rather than inside intercommunication is offered at the top of valve body, spacing step top is outer along all being provided with the annular arch that is used for the lip to weld with the groove top of erectting, and two annular archs weld sealing connection through the lip after the installation of valve gap is accomplished.

Further, the part that valve rod and valve clack are connected specifically is the installation end, the installation end specifically is step-like structure thin from top to bottom thick, and its upper portion and lower part junction establish the conical surface for the card that top-down becomes thick gradually, the top of valve clack is provided with rather than annular bounding wall as an organic whole, the top of annular bounding wall be rather than integrative and the inner wall establishes the spacing hang plate of annular of conical surface laminating with the card, and it can only pivoting motion after the installation end sets up in annular bounding wall, and installation end and valve clack are synchronous during the valve rod up-and-down moves.

Furthermore, the bottom of the part, which is not arranged in the inner cavity of the valve cover, of the upper corrugated pipe seat is an inclined surface which inclines upwards and the outer diameter of the inclined surface gradually increases from bottom to top.

Compared with the prior art, the utility model has the following advantages:

1. the stop valve provided by the utility model has wide application range, can be suitable for external pipes with various sizes and structures, and is convenient to replace;

2. by using the lip welding, the utility model can avoid the leakage risk caused by using the gasket, effectively seal the equipment and simultaneously facilitate the disassembly and the recycling of the equipment parts;

3. the equipment has the advantages of simple overall structure, convenient installation, sealed conical surface and good sealing effect.

Drawings

FIG. 1 is a schematic diagram of the structure of the apparatus in the example;

in the figure: 1. a valve body; 2. the medium flows into and flows out of the channel; 3. starting and stopping the channel; 4. a valve flap; 5. a semi-spherical body; 6. a valve stem; 7. a bellows; 8. a valve cover; 9. an upper bellows seat; 10. a gland nut; 11. pressing the sleeve nut; 12. a hand wheel; 13. a connecting end; 14. a first conical surface; 15. taking over a pipe; 16. an external connection section; 17. a stage of stage; 18. a sealing section; 19. an insertion section; 20. a second tapered surface; 21. a gasket; 22. a union nut; 23. a limiting step; 24. an annular projection; 25. an installation end; 26. an annular coaming; 27. the limiting inclined plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it should be understood 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.

An embodiment of the present invention is described below:

the embodiment provides a gasket-free filled spherical sealing high-pressure bellows stop valve, which comprises a valve body 1, wherein two ends of the valve body 1 are both provided with medium inflow and outflow channels 2, and with reference to fig. 1, in fig. 1, the two medium inflow and outflow channels 2 are horizontal cylindrical cavities, the axes of the two media are parallel but do not intersect, and in the actual production process, the distance between the axes of the two media can be set as required; the inner ends of the two medium inflow and outflow channels 2 are connected through a vertical start-stop channel 3 in the valve body 1, the top of the start-stop channel 3 is also communicated with an installation space which is arranged at the top of the valve body 1 and used for installing a valve clack 4, a valve rod 6 and a valve cover 8, wherein the valve clack 4 is arranged right above the start-stop channel 3, the valve clack 4 is cylindrical, the center of the bottom of the valve clack is provided with a hemispherical body 5 which is convex downwards and can open and close the top of the start-stop channel 3, the valve rod 6 is arranged right above the valve clack 4, the bottom of the valve rod 6 is provided with an installation end 25, the installation end 25 is specifically of a step-shaped structure with a thin upper part and a thick lower part, the connection part of the installation end 25 is a clamping conical surface which becomes thick gradually from top to bottom, the installation end 25 is directly turned by a lathe, and in order to connect the valve clack 4 and the valve rod 6, in the embodiment, the top of the valve clack 4 is provided with an annular enclosing plate 26 which is also turned out by a solid whole body, the inner diameter of the annular enclosing plate 26 is the same as the outer diameter of the bottom of the mounting end 25, after the lower part of the mounting end 25 is arranged in the annular enclosing plate, the limiting inclined plate 27 at the top of the annular enclosing plate 26 can be completely covered on the clamping conical surface, and the height of the annular enclosing plate 26 at the moment is the same as that of the thicker part of the lower part of the mounting end 25, so that the mounting end 25 of the valve rod 6 can rotate relative to the valve clack 4, but the two keep synchronous motion in the vertical direction, in particular, the initial moment of the limiting inclined plate 27 is a vertical plate integrated with the annular enclosing plate 26, after the mounting end 25 is placed in the annular enclosing plate 26, the limiting inclined plate 27 can be inclined and attached to the clamping conical surface by rolling, and the connection between the valve clack 4 and the valve rod 6 is completed; in order to protect the valve rod 6, the outer side of the valve rod 6 is sleeved with a corrugated pipe 7, the bottom end of the corrugated pipe 7 is welded and sealed with the top of the valve clack 4, the top of the corrugated pipe 7 is welded with the bottom of an upper corrugated pipe seat 9 sleeved on the valve rod 6, the upper corrugated pipe seat 9 is combined with the attached drawing, the structure is concretely a structure with a thick upper part and a thin lower part, the top of the valve rod 6 penetrates into the center of the bottom of the valve rod and penetrates out of the center of the top of the valve rod, the outer side of the upper corrugated pipe seat 9 is sleeved with a valve cover 8, the bottom end of the valve cover 8 is arranged in an installation space and is in threaded connection with the inner wall of the installation space, meanwhile, the outer wall of the valve cover 8 is provided with a limiting step 23 which is integrated with the valve cover, the part below the limiting step 23 is in threaded connection with the inner wall of the installation space, meanwhile, the top of the installation space is also provided with an erection groove for accommodating the limiting step 23, meanwhile, the top of the outer edge of the limiting step 23 and the valve body 1 corresponding to the top of the erection groove are both provided with annular bulges 24 for lip welding, when the device is installed, the bottom end of the valve cover 8 is in threaded connection with an installation space, and then the two annular protrusions 24 are subjected to lip welding sealing, so that the valve body 1 and the valve cover 8 are effectively connected, meanwhile, the valve body 1 and the valve cover 8 can be effectively sealed and are convenient to disassemble, the device can be repeatedly used in the later period, when the device is disassembled, only the welding points of the two annular protrusions 24 need to be polished, the device can be disassembled by screwing after the connecting points are polished, and the repeated utilization rate of the device is improved; after the valve cover 8 is installed, the valve rod 6, the valve clack 4, the corrugated pipe 7 and the upper corrugated pipe seat 9 are integrally placed into the valve cover 8, wherein the thinner part of the upper corrugated pipe seat 9 is completely arranged in the valve cover 8, the bottom of the thicker part of the upper corrugated pipe seat is a conical surface with the outer diameter gradually reduced from top to bottom, the top of the valve cover 8 is a plane, so that the contact part of the upper corrugated pipe seat 9 and the valve cover 8 is only an annular contact line, then a gland nut 10 is sleeved on the valve rod 6, the gland nut 10 is particularly of a structure with the thinner upper part and the thicker lower part, the thicker part of the lower part of the gland nut is sleeved on the outer side of the valve cover 8 and is in threaded connection with the valve cover, the annular contact line can be effectively compressed and the annular contact line are sealed, meanwhile, the thinner part of the upper part of the gland nut is sleeved on the outer side of the valve rod 6, and the part of the middle part of the valve rod and the valve rod 6 are in threaded connection with the valve rod 6, therefore, when the gland nut 10 is not moved and the valve rod 6 rotates, the gland nut 10 and the valve rod 6 can generate relative motion, namely the valve rod 6 can move up and down under the condition that the gland nut 10 is not moved, and then the valve clack 4 at the bottom is driven to move up and down, so that the start-stop channel 3 is opened or closed; meanwhile, a pressing sleeve nut 11 sleeved on the valve rod 6 is further arranged right above the gland nut 10, an inner cavity of the pressing sleeve nut is of a structure with a thin upper part and a thick lower part, the inner wall of the thin upper part of the pressing sleeve nut is attached to the outer wall of the valve rod 6, the inner wall of the thick lower part of the pressing sleeve nut is in threaded connection with the outer wall of the upper part of the pressing sleeve nut 11, the pressing sleeve nut 11 is effectively fixed, meanwhile, the top of the valve rod 6 penetrates out of the pressing sleeve nut 11 and then is connected with a hand wheel 12, the valve clack 4 can be effectively driven to move up and down by rotating the hand wheel 12, and therefore the connection and disconnection of two media flowing into and flowing out of the channel 2 can be achieved.

Particularly, in order to further facilitate connection with an external pipe, in this embodiment, the outer ends of the two medium inflow and outflow channels 2 are the same and are both a connection end 13, the connection end 13 is a hollow cylindrical structure with a threaded outer wall, and the inner wall of the connection end is a first conical surface 14 with a gradually decreasing inner diameter from outside to inside to form a sealed space, the inner end of the sealed space is connected with the corresponding medium inflow and outflow channel 2, the outer end is communicated with the external space, meanwhile, a connection pipe 15 is arranged on the outer side of the connection end 13, the connection pipe 15 is an integrated structure formed by turning a hollow cylindrical pipe, and is specifically, in combination with the drawing, sequentially divided into an external section 16, a step section 17, a sealing section 18 and an insertion section 19 from outside to inside, the outer wall of the insertion section 19 is a second conical surface 20 capable of tightly fitting with the first conical surface 14 and is arranged in the inner cavity of the connection end 13, so that the two conical surfaces can be fitted together to effectively seal after the insertion section 19 is inserted into the sealed space, meanwhile, for further sealing, the outer diameter of the thicker end of the sealing section is the same as the outer diameter of the sealing section 18 and is smaller than the outer diameter of the connecting end 13, the sealing section 18 is sleeved with a gasket 21, the outer diameter of the gasket 21 is smaller than the outer diameter of the connecting end 13, the outer diameter of the step section 17 is equal to the outer diameter of the connecting end 13 and is larger than the outer diameter of the external section 16, the external section 16 is sleeved with a joint nut 22, the inner diameter of the part, sleeved on the external section 16, of the joint nut 22 is the same as the outer diameter of the external section 16, the inner diameter of the part, facing the connecting end 13, of the joint nut 22 is the same as the outer diameter of the connecting end 13 and is sleeved on the outer side of the connecting end 13, and the joint nut and the external section are in threaded connection; through the arrangement, the joint nut 22 is sleeved on the external connection section 16 and then screwed, and the joint nut 22 can extrude the gasket 21 and the insertion section 19 to the direction of the sealed space through the stage 17, so that effective sealing is realized; when facing different size external connecting pipes, only need change circumscribed section 16 alright, improved the suitability of equipment.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A spherical sealing high-pressure corrugated pipe stop valve without gasket packing comprises a valve body (1), wherein two ends of the valve body (1) are respectively provided with a medium inflow and outflow channel (2), and the medium inflow and outflow channels are connected through a start-stop channel (3) in the valve body (1), the two media inflow and outflow channels are parallel to each other and are not intersected with each other, a valve clack (4) is arranged right above the start-stop channel (3), the center of the bottom of the valve clack (4) is provided with a hemispherical body (5) which protrudes downwards and is used for opening and closing the start-stop channel (3), the center of the top of the valve clack (4) is connected with a valve rod (6), the valve rod (6) is sleeved with a corrugated pipe (7), the bottom end of the corrugated pipe (7) is hermetically connected with the top of the valve clack (4), the outer side of the corrugated pipe (7) is sleeved with a valve cover (8), and the bottom end of the valve cover (8) is hermetically connected with the valve body (1), an upper corrugated pipe seat (9) sleeved on the valve rod (6) is arranged right above the valve cover (8), the bottom end of the upper corrugated pipe seat (9) is inserted into the valve cover (8) and is connected with the corrugated pipe (7) in a sealing way, the upper part of the upper corrugated pipe seat is erected on the top of the valve cover (8), a gland nut (10) sleeved on the valve rod (6) is arranged right above the upper corrugated pipe seat (9), the lower part of the gland nut (10) is sleeved on the outer wall of the valve cover (8) and is in threaded connection with the valve cover, the inner wall part of the gland nut (10) is in threaded connection with the outer wall of the valve rod (6), a gland nut (11) sleeved on the valve rod (6) is also arranged right above the gland nut (10), the lower part of the gland nut (11) is sleeved on the upper part of the gland nut (10) and is in threaded connection with the gland nut, and a hand wheel (12) is fixedly mounted at the top of the valve rod (6).

2. The spherical sealing high-pressure corrugated pipe stop valve without gasket filling according to claim 1, characterized in that the outer ends of the two medium inflow and outflow channels (2) have the same structure corresponding to the valve body (1) and are both connection ends (13), the connection ends (13) are hollow cylindrical structures with threads on the outer walls, the inner walls of the connection ends are first conical surfaces (14) with gradually reduced inner diameters from outside to inside, a connection pipe (15) is arranged on the outer side of the connection end (13), the connection pipe (15) is an integrated structure formed by an external connection section (16), a step section (17), a sealing section (18) and an insertion section (19), the outer wall of the insertion section (19) is a second conical surface (20) which can be tightly attached to the first conical surface (14) and is arranged in the inner cavity of the connection end (13), and the outer diameter of the thicker end of the insertion section is the same as the outer diameter of the sealing section (18), the cover is equipped with packing ring (21) on seal segment (18), the external diameter of packing ring (21) is less than the external diameter of link (13), and the external diameter of step section (17) equals the external diameter of link (13) and is greater than the external diameter of external section (16), the cover is equipped with coupling nut (22) on external section (16), its internal diameter of part that coupling nut (22) cover was established on external section (16) is the same with external section (16) external diameter, and its partial internal diameter towards link (13) is the same with link (13) external diameter and the cover is established in its outside, two threaded connection.

3. The spherical sealing high-pressure corrugated pipe stop valve without the gasket packing as claimed in claim 2, wherein the outer wall of the valve cover (8) is provided with a limit step (23) integrated therewith, the part of the valve cover (8) below the limit step (23) is inserted into the valve body (1) and is in threaded connection with the inner wall of the valve body (1), the top of the valve body (1) is provided with an erection groove for erecting the limit step (23) and communicating with the inside of the valve body, the outer edge of the top of the limit step (23) and the top of the erection groove are both provided with annular protrusions (24) for lip welding, and the two annular protrusions (24) are in sealing connection through the lip welding after the installation of the valve cover (8).

4. The spherical sealing high-pressure corrugated pipe stop valve without the gasket packing as claimed in claim 3, wherein the connection part of the valve rod (6) and the valve flap (4) is specifically a mounting end (25), the mounting end (25) is specifically a step-shaped structure with a thin upper part and a thick lower part, the connection part of the upper part and the lower part is a clamping conical surface which becomes thick gradually from top to bottom, the top of the valve flap (4) is provided with an annular enclosing plate (26) which is integrated with the valve flap, the top of the annular enclosing plate (26) is an annular limiting inclined plate (27) which is integrated with the annular enclosing plate and the inner wall of which is attached to the clamping conical surface, the mounting end (25) can only rotate around a shaft after being arranged in the annular enclosing plate (26), and the mounting end (25) and the valve flap (4) move up and down synchronously when the valve rod (6) moves up and down.

5. The spherical sealing high-pressure bellows stop valve without gasket packing as claimed in claim 4, wherein the bottom of the part of the upper bellows seat (9) not arranged in the inner cavity of the bonnet (8) is an inclined surface which inclines upwards and has gradually larger outer diameter from bottom to top.