High-pressure stop valve

Abstract

The utility model provides a high-pressure stop valve. The high-pressure stop valve aims at solving the technical problem that an existing high-pressure stop valve needs workers to approach to conduct opening and closing operation, and safety risks exist. According to the technical scheme, the high-pressure stop valve comprises a valve body with a valve cavity and a valve clack arranged in the valve cavity. The valve clack is connected with the lower end of the valve rod, and the upper end of the valve rod penetrates out of the valve body. The valve body is provided with a valve cover, and the valve cover seals the portion, allowing the valve rod to penetrate out, of the valve body and guides and limits the valve rod. The valve rod is in transmission connection with the first end of the lengthening rod, and a first hand wheel is installed at the second end of the lengthening rod. When the first hand wheel rotates forwards or reversely, the extension rod drives the valve rod to ascend or descend; a valve seat is arranged in the valve cavity of the valve body; when the valve clack is driven by the valve rod to descend to be attached to the valve seat, the valve cavity is cut off by the valve clack. By adopting the explosion-proof isolation wall, a worker can carry out switching operation through the explosion-proof isolation wall, so that the personal safety of the worker is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a high-pressure stop valve. Background Art

[0002] High-pressure stop valve is a kind of valve widely used in high-pressure pipeline system. It is a forced closed valve. Its closing principle is to rely on the valve stem pressure to make the sealing surface of the valve disc fit closely with the sealing surface of the valve seat, thereby preventing the flow of medium.

[0003] Most of the existing high-pressure stop valves require workers to approach to operate them in order to switch them on and off. The application scenario of high-pressure stop valves is in high-pressure pipeline systems. Once the high-pressure stop valve is damaged or leaks during switching, it is likely to endanger the personal safety of the workers. Summary of the invention

[0004] The utility model aims to provide a high-pressure stop valve, which can be used by workers to perform switch operations across an explosion-proof isolation wall, thereby ensuring the personal safety of the workers.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A high-pressure stop valve, comprising:

[0007] a valve body having a valve chamber;

[0008] a valve flap, which is arranged in the valve cavity;

[0009] A valve stem, the lower end of which is connected to the valve disc and the upper end of which passes through the valve body;

[0010] A valve cover is mounted on the valve body to seal the portion of the valve body through which the valve stem passes and to guide and limit the valve stem;

[0011] An extension rod, a first end of which is in transmission connection with the valve stem;

[0012] A first hand wheel mounted on the second end of the extension rod;

[0013] When the first hand wheel rotates forward or reversely, the extension rod drives the valve stem to rise or fall; the valve body is provided with a valve seat in the valve cavity; when the valve disc is driven by the valve stem and falls to fit with the valve seat, the valve cavity is cut off by the valve disc.

[0014] Optionally, the upper section of the valve stem has a thread and is adapted to a nut; the nut is coaxially connected to the worm gear; the first end of the extension rod is coaxially connected to the first worm; the worm gear and the first worm are meshed with each other; the valve stem is adapted to a limit piece that prevents it from rotating, so that the nut drives the valve stem to rise or fall when it rotates forward or reverse.

[0015] Optionally, the worm wheel is rotatably mounted in the housing; the first end of the first worm is meshed with the worm wheel, and the second end of the first worm passes through the housing and is connected to the extension rod; the housing and the valve cover are connected via a bracket.

[0016] Optionally, two limit members are provided, which are relatively buckled on both sides of the valve stem; the limit member is provided with a limit groove on the side facing the valve stem, and the bottom surface of the limit groove is set to be a plane; the valve stem is provided with a restricted plane on the side to form a limit fit with the bottom surface of the limit groove.

[0017] Optionally, the two limiting members are connected by bolts to be installed on the valve stem; a groove is provided at the end of the limiting member, and a boss is provided on the bracket, and the groove and the boss form a limiting fit.

[0018] Optionally, the bracket is made of aluminum alloy.

[0019] Optionally, the valve cover includes: an upper cover, a lower cover, and a support tube connecting the upper cover and the lower cover; the upper cover is connected to the bracket, and the lower cover is connected to the valve body.

[0020] Optionally, it also includes a second hand wheel, which is coaxially connected to the second worm; the worm wheel and the second worm are meshed with each other.

[0021] Optionally, the extension rod is connected to the first worm gear via a first connecting member; the first connecting member includes a cylindrical first connecting section and a second connecting section; the first connecting section and the first worm gear are provided with corresponding radial through holes, and the first connecting section and the first worm gear are connected via bolts installed in the radial through holes; the second connecting section and the extension rod are correspondingly provided with keyways, and the second connecting section and the extension rod are key-connected.

[0022] Optionally, the first handwheel and the extension rod are connected via a second connecting member; the second connecting member comprises a cylindrical third connecting segment and a columnar fourth connecting segment; the third connecting segment and the extension rod are correspondingly provided with key slots, and the third connecting segment and the extension rod form a key connection; a threaded hole is provided on the end face of the fourth connecting segment, and the first handwheel and the fourth connecting segment are connected via a bolt installed in the threaded hole.

[0023] The working principle of the utility model is as follows: when installing the high-pressure stop valve, a hole can be drilled in the explosion-proof isolation wall for the extension rod to pass through. Then, the first end of the extension rod is connected to the valve stem in a transmission manner, and a first hand wheel is installed at the second end of the extension rod. In this way, the valve stem can be driven to move up and down by rotating the first hand wheel outside the explosion-proof isolation wall, thereby completing the on / off switching of the high-pressure stop valve.

[0024] It can be seen that the beneficial effect of the utility model is that when the high-pressure stop valve needs to be opened or closed, the staff can perform the switch operation across the explosion-proof isolation wall, and there is no need to cross the explosion-proof isolation wall to approach the high-pressure stop valve for switch operation, which is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 It is a schematic diagram of the connection between the extension rod and the first connecting member and the second connecting member;

[0028] Figure 3 It is a schematic diagram of the structure of the limiter.

[0029] Figure numerals: 1. valve body; 2. valve disc; 3. valve stem; 4. valve cover; 5. extension rod; 6. first hand wheel; 7. first worm gear; 8. limit member; 9. housing; 10. limit groove; 11. bracket; 12. groove; 13. boss; 14. upper cover; 15. lower cover; 16. support cylinder; 17. second hand wheel; 18. first connecting member; 19. first connecting section; 20. second connecting section; 21. radial through hole; 22. second connecting member; 23. third connecting section; 24. fourth connecting section; 25. explosion-proof isolation wall. DETAILED DESCRIPTION

[0030] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0031] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0034] The following is combined with Figure 1 ~Attached Figure 3 The embodiments of the present utility model are described in detail.

[0035] The embodiment of the utility model provides a high-pressure stop valve, which includes: a valve body 1 having a valve cavity, and a valve flap 2 arranged in the valve cavity. The valve flap 2 is connected to the lower end of the valve stem 3, and the upper end of the valve stem 3 passes through the valve body 1. The valve body 1 is equipped with a valve cover 4, and the valve cover 4 seals the portion of the valve body 1 through which the valve stem 3 passes, and forms a guide limit for the valve stem 3. It should be understood that the upper end of the valve stem 3 passes through the upper part of the valve body 1, and the valve cover 4 seals the upper part of the valve body 1. The valve stem 3 is connected to the first end of the extension rod 5 in a transmission connection, and the second end of the extension rod 5 is equipped with a first hand wheel 6. It should be understood that the end of the extension rod 5 corresponding to the valve stem 3 constitutes the first end of the extension rod 5, and the end of the extension rod 5 corresponding to the first hand wheel 6 constitutes the second end of the extension rod 5. When the first hand wheel 6 rotates forward or reversely, the extension rod 5 drives the valve stem 3 to rise or fall. The valve body 1 is provided with a valve seat in the valve cavity; when the valve flap 2 is driven by the valve stem 3 and descends to fit the valve seat, the valve cavity is cut off by the valve flap 2 .

[0036] The specific implementation of the utility model is described below: When installing the high-pressure stop valve, a hole can be drilled in the explosion-proof isolation wall 25 for the extension rod 5 to pass through. Then, the first end of the extension rod 5 is connected to the valve stem 3 by transmission, and the first hand wheel 6 is installed at the second end of the extension rod 5. In this way, usually, the valve stem 3 can be driven to move up and down by turning the first hand wheel 6 outside the explosion-proof isolation wall 25, thereby completing the switch switching of the high-pressure stop valve. With the utility model, when the high-pressure stop valve needs to be opened or closed, the staff can perform the switch operation across the explosion-proof isolation wall 25, and no longer need to cross the explosion-proof isolation wall 25 to approach the high-pressure stop valve for switch operation, which is safer.

[0037] Further, the upper section of the valve stem 3 has a thread and is adapted to a nut; the nut is coaxially connected to the worm gear; the first end of the extension rod 5 is coaxially connected to the first worm 7; the worm gear and the first worm 7 are meshed with each other; the valve stem 3 is adapted to a stopper 8 that prevents it from rotating, so that the nut can drive the valve stem 3 to rise or fall when it rotates forward or reversely. It should be understood that in addition to the aforementioned method, the extension rod 5 and the valve stem 3 can also be connected in the following way: a rotatable transmission rod is installed at the upper end of the valve stem 3 through a coupling, the worm gear is changed to be coaxially connected to the transmission rod, and the nut is kept fixed; in this way, the extension rod 5 drives the worm gear and the transmission rod to rotate through the first worm gear 7, and can drive the transmission rod and the valve stem 3 to rise and fall. The valve stem 3 and the extension rod 5 are connected in transmission through the cooperation of the worm gear and the first worm gear 7, which can make it easier for the staff to turn the first hand wheel 6.

[0038] Further, the worm wheel is rotatably mounted in the housing 9; the first end of the first worm 7 is meshed with the worm wheel, and the second end of the first worm 7 passes through the housing 9 and is connected to the extension rod 5; the housing 9 is connected to the valve cover 4 through the bracket 11. It should be understood that the end of the first worm 7 corresponding to the worm wheel constitutes the first end of the first worm 7, and the end of the first worm 7 corresponding to the extension rod 5 constitutes the second end of the first worm 7. The worm wheel and the first worm 7 are rotatably connected to the housing 9 through bearings. When the nut is rotated to drive the valve stem 3 to rise and fall, the nut and the worm wheel cannot move up and down.

[0039] Furthermore, the limiting members 8 are provided with two, which are buckled on both sides of the valve stem 3; the limiting member 8 is provided with a limiting groove 10 on the side facing the valve stem 3, and the groove bottom surface of the limiting groove 10 is set to be a plane; the valve stem 3 is provided with a limiting plane on the side to form a limiting match with the groove bottom surface of the limiting groove 10. It should be understood that the limiting plane of the valve stem 3 is attached to the groove bottom surface of the limiting groove 10, which can prevent the valve stem 3 from rotating relative to the limiting member 8. A plane groove that passes through in the horizontal direction can be processed on the side of the valve stem 3, and the groove bottom surface of the plane groove can constitute a limiting plane.

[0040] Furthermore, the two stoppers 8 are connected by bolts to be installed on the valve stem 3; a groove 12 is provided at the end of the stopper 8, and a boss 13 is provided on the bracket 11, and the groove 12 and the boss 13 form a stopper fit. It should be understood that the groove 12 of the stopper 8 can slide up and down along the boss 13 of the bracket 11; the boss 13 of the bracket 11 prevents the valve stem 3 from rotating by preventing the stopper 8 from rotating. The stopper 8 is installed on the valve stem 3 so that the stopper 8 and the bracket 11 slide relative to each other, rather than installing the stopper 8 on the bracket 11 so that the valve stem 3 and the stopper 8 slide relative to each other; wear of the valve stem 3 can be avoided, which is conducive to extending the service life of the valve stem 3; compared with replacing the valve stem 3, the replacement of the stopper 8 will be more convenient.

[0041] Furthermore, the bracket 11 is made of aluminum alloy. It should be understood that the bracket 11 is made of aluminum alloy, which is lighter and helps to reduce the load of the valve cover 4.

[0042] Further, the valve cover 4 includes: an upper cover 14, a lower cover 15, and a support cylinder 16 connecting the upper cover 14 and the lower cover 15; the upper cover 14 is connected to the bracket 11, and the lower cover 15 is connected to the valve body 1. It should be understood that the upper cover 14 and the bracket 11, and the lower cover 15 and the valve body 1 are usually connected by bolts.

[0043] Furthermore, it also includes a second hand wheel 17, which is coaxially connected to the second worm; the worm wheel and the second worm are meshed with each other. It should be understood that when operations such as inspection and maintenance that must be performed close to the high-pressure stop valve are performed, the high-pressure stop valve can be operated through the second hand wheel 17, without having to go back and forth across the explosion-proof isolation wall 25 to operate through the first hand wheel 6, which is more convenient.

[0044] Further, the extension rod 5 and the first worm 7 are connected through a first connecting member 18; the first connecting member 18 includes a cylindrical first connecting section 19 and a second connecting section 20; the first connecting section 19 and the first worm 7 are provided with corresponding radial through holes 21, and the first connecting section 19 and the first worm 7 are connected by bolts installed in the radial through holes 21; the second connecting section 20 and the extension rod 5 are provided with keyways correspondingly, and the second connecting section 20 and the extension rod 5 are key-connected. It should be understood that the first connecting section 19 and the first worm 7 are connected by bolts installed in the radial through holes 21, rather than machining radial threaded holes in the first connecting section 19 and connecting the first connecting section 19 and the first worm 7 by bolts. The advantages are: there is no need to worry about the first connecting section 19 being damaged in the thread, and the service life is longer; there is no need to worry about the first connecting section 19 and the first worm 7 rotating relative to each other due to slipping.

[0045] Furthermore, the first hand wheel 6 is connected to the extension rod 5 through the second connecting member 22; the second connecting member 22 includes a cylindrical third connecting section 23 and a columnar fourth connecting section 24; the third connecting section 23 and the extension rod 5 are provided with keyways correspondingly, and the third connecting section 23 and the extension rod 5 are key-connected; the end surface of the fourth connecting section 24 is provided with a threaded hole, and the first hand wheel 6 and the fourth connecting section 24 are connected by bolts installed in the threaded hole. It should be understood that the center of the first hand wheel 6 is provided with a mounting hole for the rod of the bolt to pass through. The two ends of the extension rod 5 are connected by keys, which is convenient for disassembly and assembly. When the existing high-pressure stop valve is transformed into the high-pressure stop valve provided by the utility model, it is convenient to pass the extension rod 5 through the explosion-proof isolation wall 25.

[0046] Although specific embodiments of the present invention are described above, those skilled in the art should understand that various changes or modifications may be made to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications are all within the scope of protection of the present invention.

Claims

1. A high pressure stop valve, characterized in that: include: A valve body (1) having a valve chamber; A valve flap (2) disposed in the valve cavity; A valve stem (3), the lower end of which is connected to the valve flap (2) and the upper end of which passes through the valve body (1); A valve cover (4) is mounted on the valve body (1), sealing a portion of the valve body (1) through which the valve stem (3) passes, and providing a guide limit for the valve stem (3); An extension rod (5), a first end of which is in transmission connection with the valve stem (3); A first hand wheel (6) mounted on the second end of the extension rod (5); in, When the first hand wheel (6) rotates forward or reversely, the extension rod (5) drives the valve stem (3) to rise or fall; The valve body (1) is provided with a valve seat in the valve cavity; When the valve flap (2) is driven by the valve stem (3) to descend to fit the valve seat, the valve cavity is cut off by the valve flap (2); The first hand wheel (6) and the extension rod (5) are connected via a second connecting member (22); The second connecting member (22) comprises a cylindrical third connecting section (23) and a columnar fourth connecting section (24); The third connecting section (23) and the extension rod (5) are provided with key grooves correspondingly, and the third connecting section (23) and the extension rod (5) form a key connection; A threaded hole is provided on the end surface of the fourth connecting section (24), and the first hand wheel (6) and the fourth connecting section (24) are connected via bolts installed in the threaded hole.

2. The high pressure stop valve according to claim 1, characterized in that: The upper section of the valve stem (3) has threads and is adapted to fit a nut; The nut is coaxially connected to the worm wheel; the first end of the extension rod (5) is coaxially connected to the first worm (7); The worm wheel and the first worm (7) are meshed with each other; The valve stem (3) is adapted to have a limiter (8) that prevents it from rotating, so that the nut drives the valve stem (3) to rise or fall when rotating forward or reverse.

3. The high pressure stop valve according to claim 2, characterized in that: The worm gear is rotatably mounted in the housing (9); The first end of the first worm (7) is meshed with the worm wheel, and the second end of the first worm (7) passes through the housing (9) and is connected to the extension rod (5); The housing (9) and the valve cover (4) are connected via a bracket (11).

4. The high pressure stop valve according to claim 3, characterized in that: The limiting members (8) are provided with two and are buckled on two sides of the valve stem (3) opposite to each other; The limiting member (8) is provided with a limiting groove (10) on a side facing the valve stem (3), and the bottom surface of the limiting groove (10) is arranged to be a plane; The valve stem (3) is provided with a limiting plane on the side surface so as to form a limiting fit with the bottom surface of the limiting groove (10).

5. The high pressure stop valve according to claim 4, characterized in that: The two stoppers (8) are connected by bolts so as to be mounted on the valve stem (3); The end of the limiting member (8) is provided with a groove (12), the bracket (11) is provided with a boss (13), and the groove (12) and the boss (13) form a limiting fit.

6. The high pressure stop valve according to any one of claims 3 to 5, characterized in that: The bracket (11) is made of aluminum alloy.

7. The high pressure stop valve according to any one of claims 3 to 5, characterized in that: The valve cover (4) comprises: an upper cover (14), a lower cover (15), and a support cylinder (16) connecting the upper cover (14) and the lower cover (15); The upper cover (14) is connected to the bracket (11), and the lower cover (15) is connected to the valve body (1).

8. The high pressure stop valve according to any one of claims 2 to 5, characterized in that: It also includes a second hand wheel (17), wherein the second hand wheel (17) is coaxially connected to the second worm gear; The worm wheel and the second worm are meshed with each other.

9. The high pressure stop valve according to any one of claims 2 to 5, characterized in that: The extension rod (5) and the first worm gear (7) are connected via a first connecting member (18); The first connecting member (18) comprises a first cylindrical connecting section (19) and a second connecting section (20); The first connecting section (19) and the first worm (7) are provided with corresponding radial through holes (21), and the first connecting section (19) and the first worm (7) are connected via bolts installed in the radial through holes (21); The second connecting section (20) and the extension rod (5) are provided with key grooves correspondingly, and the second connecting section (20) and the extension rod (5) form a key connection.

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