CN117780942A - Duplex stop valve structure - Google Patents
Duplex stop valve structure Download PDFInfo
- Publication number
- CN117780942A CN117780942A CN202311831791.8A CN202311831791A CN117780942A CN 117780942 A CN117780942 A CN 117780942A CN 202311831791 A CN202311831791 A CN 202311831791A CN 117780942 A CN117780942 A CN 117780942A
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- Prior art keywords
- valve
- fixedly connected
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- wall
- connecting block
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- 238000012856 packing Methods 0.000 claims abstract description 16
- 210000004907 gland Anatomy 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 8
- 125000006850 spacer group Chemical group 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 21
- 238000009434 installation Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Details Of Valves (AREA)
Abstract
The invention relates to the technical field of valves, in particular to a duplex stop valve structure, which comprises a valve body, wherein a first valve cover and a second valve cover are fixedly connected to two sides of the valve body respectively, the inner structure of the second valve cover is the same as that of the first valve cover, a valve clack is arranged in the valve body, a gland is fixedly connected to the inner wall of the valve clack, and a valve rod is fixedly connected to the inner wall of the valve clack. Compared with the prior art, the first valve cover and the second valve cover are arranged at a vertical angle in production, the distances between the central lines of the first valve cover and the second valve cover and between the central lines of the two hand wheel operating parts are small and form ninety degrees, the installation space is saved, and the whole valve only has two external leakage points of the valve rod and the first valve cover or the packing sealing piece between the valve rod and the second valve cover, so that the risk of valve leakage is greatly reduced, and the effect of protecting the environment is achieved.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a duplex stop valve structure.
Background
In industrial pipelines, it is often necessary to use two valves in series to install the pipeline in order to ensure that the pipeline is still shut off in the event of a valve closure failure. First, when an industrial pipe needs to be normally closed shut off, shut off using double valves is more reliable than shut off using single valves. Secondly, when the duplex valve is installed on the normally open pipeline, if the downstream pipeline breaks down and needs to be salvaged, the pressure from the upstream pipeline needs to be blocked at the moment, and the duplex valve can be closed, so that the life safety of downstream personnel is guaranteed to the greatest extent.
In the prior art, two common stop valves are connected in series during installation, the arrangement can achieve the functions, the cutoff is reliable, the life safety of maintenance personnel can be guaranteed under emergency, but in actual use, large installation space is required for the series connection of the double valves, sealing is achieved by using bolts to compress gaskets during installation between the double valves, the increase of leakage points of the valves is caused, the environment is possibly polluted, meanwhile, the inlet and the outlet of the double stop valve are arranged on the same central line, the conventional double stop valve can only be installed on pipelines with the same axis, the installation between the pipelines with ninety degrees of angles cannot be met, and the application range of the double stop valve is limited. Thus, we disclose a dual shut-off valve structure to meet the needs.
Disclosure of Invention
Therefore, the invention aims to provide a duplex stop valve structure, which solves the problems that the inlet and the outlet of the duplex stop valve in the prior art are on the same central line, which means that the conventional duplex stop valve can only be installed on the pipelines with the same axis, the installation between the two pipelines with ninety degrees cannot be satisfied, and the application range of the duplex stop valve is limited.
Based on the above object, the invention provides a duplex stop valve structure, which comprises a valve body, wherein a first valve cover and a second valve cover are respectively and fixedly connected to two sides of the valve body, the inner structure of the second valve cover is the same as that of the first valve cover, the first valve cover and the second valve cover are arranged at a vertical angle, a valve clack is arranged in the valve body, a gland is fixedly connected to the inner wall of the valve clack, a valve rod is fixedly connected to the inner wall of the valve clack, a packing backing ring is fixedly connected to the outer wall of the valve rod, a packing sealing piece is fixedly connected to the outer wall of the valve rod, a pressing sleeve is fixedly connected to the outer wall of the pressing sleeve, a pressing plate is arranged on the outer wall of the valve rod, a hand wheel is arranged at the top of the valve rod, a first connecting block and a second connecting block are respectively and fixedly connected to two sides of the valve body, an outlet is formed in the first connecting block, and an inlet is formed in the second connecting block.
Preferably, the pressing plate is provided with a connecting hole, and the inner wall of the connecting hole is abutted with the outer wall of the pressing sleeve.
Preferably, the first valve cover, the second valve cover and the valve body are fixedly connected through welding.
Preferably, the valve rod is rotationally connected with the first valve cover, the first valve cover is arranged outside the packing backing ring, the packing sealing piece, the pressing sleeve and the pressing plate, and one end of the valve rod penetrates out of the first valve cover.
Preferably, the inner wall of the valve body is provided with a second throttling surface, and the outer wall of the valve clack is provided with a first throttling surface.
Preferably, the pressing sleeve is split.
Preferably, the first connecting block, the second connecting block and the valve body are fixedly connected in a welding mode.
The invention has the beneficial effects that:
through the first valve cover and the second valve cover, when the valve is produced, the first valve cover and the second valve cover are arranged at a vertical angle, the distance between the center lines of the first valve cover and the second valve cover and the center lines of the two hand wheel operating members is small and forms a ninety-degree angle, installation space is saved, the valve in the valve body is provided with two sealing pairs when the valve body is closed, the axes of the two sealing pairs are arranged at the vertical angle, the closing member and other parts on the first valve cover and the second valve cover are arranged in different spaces, so that the valve is operated by the hand wheels, two external leakage points exist on the whole valve only by the valve rod and the first valve cover or the filler sealing member between the valve rod and the second valve cover, the risk of the valve leakage is reduced to a great extent, the effect of protecting the environment is achieved, in addition, the outlet and the inlet axes of the valve are arranged at the vertical angle, the valve can be coaxially arranged, the valve can be arranged at a ninety-degree angle, the valve can be installed in a coaxial pipeline, the valve can be installed on the coaxial pipeline, and the valve can be installed on the parallel pipeline, and the application range of the valve can be lifted by the coaxial pipeline.
Through the first throttle surface and the second throttle surface that set up, when the valve closed gradually, the throttle surface first throttle surface of valve clack is close to earlier then enters into the throttle surface second throttle surface of valve body, in this process, the flow area of medium reduces, the velocity of flow increases, the medium can wash second throttle surface and first throttle surface earlier, and the main seal face does not receive the influence of medium, continue to close the valve until the main seal face laminating time, velocity of flow between the main seal face is showing and is less than the velocity of flow between first throttle surface and the second throttle surface, the fluid weakens the washing of main seal face, thereby the main seal face has been protected, the life-span of sealed face has been prolonged.
In addition, no matter which direction the medium flows through the valve, the valve clack at the downstream side is subjected to medium pressure when being closed, and the valve clack can be tightly pressed on the sealing surface of the valve body under the assistance of the medium pressure, so that the valve is sealed very reliably when being closed, and the sealing effect is improved.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only of the invention and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a first view structure, partially broken away, of the present invention;
FIG. 2 is a schematic diagram of a first view angle structure from a side view of the present invention;
FIG. 3 is a schematic view of an explosion structure of the press sleeve and the press plate;
FIG. 4 is a schematic side view, partially in cross-section, of a valve flap, a valve body, a first throttle surface, and a second throttle surface;
FIG. 5 is a schematic view of a second view structure, partially broken away, of the present invention;
FIG. 6 is a schematic diagram of a second view angle structure from a side view of the present invention;
FIG. 7 is a schematic view of a third view in partial cross-section of the present invention;
fig. 8 is a schematic diagram of a third view angle structure from a side view of the present invention.
Marked in the figure as:
1. a valve body; 2. a first valve cover; 3. a second valve cover; 4. a valve flap; 5. a gland; 6. a valve stem; 7. a packing backing ring; 8. a packing seal; 9. pressing the sleeve; 10. a pressing plate; 11. a first connection block; 12. a hand wheel; 13. an outlet; 14. an inlet; 15. a second connection block; 16. a connection hole; 17. a first throttle surface; 18. and a second throttle surface.
Detailed Description
The present invention will be further described in detail with reference to specific embodiments in order to make the objects, technical solutions and advantages of the present invention more apparent.
It is to be noted that unless otherwise defined, technical or scientific terms used herein should be taken in a general sense as understood by one of ordinary skill in the art to which the present invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Example 1
As shown in fig. 1-4, a duplex stop valve structure, which comprises a valve body 1, the first valve gap 2 of fixedly connected with respectively and the second valve gap 3 of valve body 1 both sides, the inner structure of second valve gap 3 is the same with the inner structure of first valve gap 2, first valve gap 2 and second valve gap 3 are perpendicular angle setting, make the part that is correlated with first valve gap 2 and second valve gap 3 mutually noninterfere in the space, be favorable to the operation of hand wheel 12, be provided with valve clack 4 in valve body 1, the inner wall fixedly connected with gland 5 of valve clack 4, the inner wall fixedly connected with valve rod 6 of valve clack 4, the outer wall fixedly connected with packing grommet 7 of valve rod 6, the outer wall fixedly connected with packing seal 8 of valve rod 6, the outer wall fixedly connected with jacket 9 of valve rod, the outer wall of jacket 9 is provided with clamp plate 10, the top of valve rod 6 is provided with hand wheel 12, the both sides of valve body 1 are fixedly connected with first connecting block 11 and second connecting block 15 respectively, set up export 13 on first connecting block 11, set up export 14 on the second connecting block 15, when opening the valve, rotatable two hand wheels 12, valve rod 12 and valve rod 6 and valve rod 2 drive the reverse flow joint 12, and the reverse flow direction of the two valve clack 4 are realized, when the reverse flow channel is opened, thereby, and the medium is realized, and the valve is opened, and the valve plate 4 is moved and the reverse, and is realized, and the medium is closed, and the valve is moved and the valve is opened, and the valve plate 4 and is opened.
Through the first valve cover 2 and the second valve cover 3 which are arranged, when the valve is produced, the first valve cover 2 and the second valve cover 3 are arranged at a vertical angle, the distance between the central lines of the first valve cover 2, the second valve cover 3 and the operating members of the two hand wheels 12 is small and forms a ninety-degree angle, installation space is saved, the valve in the valve body 1 is provided with two sealing pairs when closed, the axes of the two sealing pairs are arranged at a vertical angle, the closing members and other parts on the first valve cover 2 and the second valve cover 3 are arranged in different spaces, so that the valves are not interfered with each other when the hand wheels 12 are used for operating the valve, and the whole valve only has two external leakage points, so that the risk of external leakage of the valve is greatly reduced, the effect of protecting the environment is achieved.
As shown in fig. 3, the pressing plate 10 is provided with a connecting hole 16, the inner wall of the connecting hole 16 is abutted against the outer wall of the pressing sleeve 9, the pressing sleeve 9 is split, the installation is convenient, the pressing sleeve 9 can be wrapped by the connecting hole 16 arranged on the pressing plate 10, and the pressing sleeve 9 is placed under the stress to be separated.
As shown in fig. 1, the first valve cover 2, the second valve cover 3 and the valve body 1 are fixedly connected in a welding mode, the fixing effect of the welding mode is good, and the leakage point of the valve can be effectively reduced, so that the possibility of leakage of the valve is reduced, and the environmental protection is improved.
As shown in fig. 1, the valve rod 6 is rotationally connected with the first valve cover 2, the first valve cover 2 is arranged outside the packing backing ring 7, the packing sealing element 8, the pressing sleeve 9 and the pressing plate 10, and one end of the valve rod 6 penetrates out of the first valve cover 2, so that the whole valve only has two external leakage points of the packing sealing element 8 between the valve rod 6 and the first valve cover 2 or between the valve rod 6 and the second valve cover 3, and the risk of valve leakage is greatly reduced.
As shown in fig. 4, the inner wall of the valve body 1 is provided with a second throttling surface 18, and the outer wall of the valve clack 4 is provided with a first throttling surface 17, so that the main sealing surface can be protected, and the service life of the sealing surface is prolonged.
Through the first throttling surface 17 and the second throttling surface 18, when the valve is gradually closed, the first throttling surface 17 of the throttling surface of the valve clack 4 is firstly close to and then enters the second throttling surface 18 of the throttling surface of the valve body 1, in the process, the flow area of a medium is reduced, the flow speed is increased, the medium can firstly wash the second throttling surface 18 and the first throttling surface 17, the main sealing surface is not influenced by the medium, the flow speed between the main sealing surfaces is obviously smaller than the flow speed between the inlet 14 and the second throttling surface 18 when the valve is continuously closed until the main sealing surfaces are in contact, and the washing of the fluid on the main sealing surfaces is weakened, so that the main sealing surfaces are protected, and the service life of the sealing surfaces is prolonged.
As shown in fig. 1, the first connecting block 11, the second connecting block 15 and the valve body 1 are fixedly connected by welding, so that the fixing effect of the welding is good, and the possibility of leakage of the valve can be reduced.
Example two
As shown in fig. 5-8, the difference between the second embodiment and the first embodiment is that the outlet 13 and the inlet 14 are arranged on the same axis, as shown in fig. 5-fig. valve rod 6, or the outlet 13 and the inlet 14 are arranged in parallel but not on the same axis, and are in a zigzag structure, as shown in fig. 7-fig. 8, so that the invention can be installed in pipelines with various arrangements, and the application scope of the invention is improved.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the invention (including the claims) is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
The present invention is intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present invention should be included in the scope of the present invention.
Claims (7)
1. The utility model provides a duplex stop valve structure, includes valve body (1), its characterized in that, valve body (1) both sides are first valve gap (2) and second valve gap (3) of fixedly connected with respectively, second valve gap (3) inner structure with the inner structure of first valve gap (2) is the same, first valve gap (2) with second valve gap (3) are vertical angle setting, be provided with valve clack (4) in valve body (1), the inner wall fixedly connected with gland (5) of valve clack (4), the inner wall fixedly connected with valve rod (6) of valve clack (4), the outer wall fixedly connected with packing grommet (7) of valve rod (6), the outer wall fixedly connected with packing seal (8) of valve rod (6), the outer wall fixedly connected with pressure cover (9) of valve rod (6), the outer wall of pressure cover (9) is provided with clamp plate (10), the top of valve rod (6) is provided with hand wheel (12), the both sides of valve body (1) are fixedly connected with first connecting block (11) and second connecting block (15) respectively, first connecting block (15) are seted up on first connecting block (14), first connecting block (15) are seted up on the first connecting block (14).
2. The duplex stop valve structure according to claim 1, wherein the pressure plate (10) is provided with a connecting hole (16), and the inner wall of the connecting hole (16) is abutted with the outer wall of the pressure sleeve (9).
3. The duplex stop valve structure according to claim 1, wherein the first valve cover (2) and the second valve cover (3) are fixedly connected with the valve body (1) in a welding mode.
4. The duplex stop valve structure according to claim 1, wherein the valve rod (6) is rotatably connected with the first valve cover (2), the first valve cover (2) is arranged outside the packing spacer ring (7), the packing seal (8), the pressing sleeve (9) and the pressing plate (10), and one end of the valve rod (6) penetrates out of the first valve cover (2).
5. The double shut-off valve structure according to claim 1, characterized in that the inner wall of the valve body (1) is provided with a second throttle surface (18) and the outer wall of the valve flap (4) is provided with a first throttle surface (17).
6. The duplex stop valve structure according to claim 1, wherein the pressure jacket (9) is split.
7. The duplex stop valve structure according to claim 1, wherein the first connecting block (11) and the second connecting block (15) are fixedly connected with the valve body (1) in a welding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311831791.8A CN117780942A (en) | 2023-12-28 | 2023-12-28 | Duplex stop valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311831791.8A CN117780942A (en) | 2023-12-28 | 2023-12-28 | Duplex stop valve structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117780942A true CN117780942A (en) | 2024-03-29 |
Family
ID=90381326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311831791.8A Pending CN117780942A (en) | 2023-12-28 | 2023-12-28 | Duplex stop valve structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117780942A (en) |
-
2023
- 2023-12-28 CN CN202311831791.8A patent/CN117780942A/en active Pending
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