Stop valve with high sealing performance

Abstract

The utility model relates to the technical field of stop valves, and discloses a stop valve with high sealing performance, which comprises a valve body, a liquid outlet cavity and a liquid inlet cavity are arranged in the valve body, the liquid outlet cavity is communicated with the liquid inlet cavity, and a valve clack is fixedly connected between the wall surfaces of the communicated position of the liquid outlet cavity and the liquid inlet cavity. A valve rod with one end extending out of the valve body is in threaded connection with the inner wall of the valve clack, a hand ring is fixedly connected to the top of the valve rod, and an outer sealing assembly is fixedly connected to the top of the valve body and used for conducting sealing treatment on an outer area. According to the high-sealing-performance stop valve, a traditional inner sealing treatment process at the position of the valve deck is abandoned, outer sealing treatment is conducted on the connecting position of the valve deck, liquid leakage can be better and effectively prevented on the physical level, and the sealing performance is improved by additionally arranging an elastic inner sealing treatment means in the valve body. The stability and the reliability of the sealing means in the valve body can be enhanced under long-time fluid pressure, and the purpose of high sealing performance is achieved on the whole.

Description

Technical Field

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

[0002] The globe valve, also called the stop valve, is one of the most widely used valves. It is popular because of the small friction between the sealing surfaces during opening and closing, the durability, the small opening height, the easy manufacturing and maintenance, and it is suitable not only for medium and low pressure, but also for high pressure. The closing principle of the globe valve is to rely on the valve stem pressure to make the valve disc sealing surface fit closely with the valve seat sealing surface to prevent the flow of the medium.

[0003] There are many types of stop valves. For example, a stop valve disclosed in Chinese patent CN218644894U includes a mounting body with a flow channel, a valve stem mounted on the mounting body and other structures. The stop valve can be accurately installed and different docking methods can be selected according to different working conditions, making it more practical. However, the stop valves on the market have large fluid resistance and poor sealing reliability during long-term operation, which makes it easy to leak. Therefore, a high-sealing stop valve is designed to solve the above problem. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a high-sealing stop valve, which has the advantages of high sealing performance and solves the problem of low sealing performance of traditional stop valves.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned high sealing purpose, the utility model provides the following technical solutions: a high-sealing stop valve, including a valve body, with a liquid outlet cavity and a liquid inlet cavity provided inside the valve body, the liquid outlet cavity is connected to the liquid inlet cavity, a valve disc is fixedly connected between the wall surfaces at the connection point between the liquid outlet cavity and the liquid inlet cavity, the inner wall of the valve disc is screwed to a valve stem having one end extending to the outside of the valve body, and a wrist ring is fixedly connected to the top of the valve stem.

[0008] In order to enhance the sealing and leak-proof capability of the entire exterior of the stop valve, an external sealing component is fixedly connected to the top of the valve body to seal the external area.

[0009] In order to improve the internal sealing ability of the stop valve, a bracket is fixedly connected to the top of the outer sealing component, and the inner wall of the bracket is threadedly connected to the valve stem.

[0010] An inner sealing component is arranged inside the valve body to enhance the sealing performance of the inner area.

[0011] Preferably, the outer sealing assembly includes a lower valve cover, the bottom of which is fixedly connected to the valve body, the top of which is bolted to an upper valve cover, an outer wall surface at the connection between the lower valve cover and the upper valve cover is tightly sleeved with an outer sealing ring, the upper and lower sides of the outer sealing ring are fixedly connected with a sealing sleeve, and the outer sides of the lower valve cover and the upper valve cover are tightly fitted with the sealing sleeve.

[0012] Preferably, the inner sealing assembly comprises a hard sealing gasket, the outer side of the hard sealing gasket is press-fitted to the valve body, the inner wall of the hard sealing gasket is fixedly connected with a nut, and the inner wall of the nut is threadedly connected to the valve stem.

[0013] Preferably, the inner sealing component further comprises a soft sealing gasket, which is press-fitted on the bottom of the valve disc and fits tightly with the lower wall surface of the connection point between the liquid inlet cavity and the liquid outlet cavity.

[0014] Preferably, the outer side of the bracelet is provided with a non-slip insulation cover.

[0015] Preferably, the hard sealing gasket is at least one of a stainless steel sealing gasket, a titanium sealing gasket, a graphite sealing gasket and an aluminum sealing gasket.

[0016] Preferably, the soft sealing gasket is a rubber sealing gasket.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a high-sealing stop valve, which has the following beneficial effects:

[0019] This high-sealing stop valve, by abandoning the traditional internal sealing process of the valve cover and instead performing external sealing on the valve cover connection, can more effectively prevent liquid leakage on a physical level. By additionally arranging elastic internal sealing means inside the valve body, the sealing means inside the valve body can be enhanced with extremely high stability and reliability under long-term fluid pressure, thereby achieving the purpose of high sealing as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is an internal cross-sectional view of the planar structure of the utility model.

[0022] In the figure: 1. valve body; 2. liquid outlet chamber; 3. liquid inlet chamber; 4. lower valve cover; 5. upper valve cover; 6. outer sealing ring; 7. sealing sleeve; 8. bracket; 9. valve stem; 10. wrist ring; 11. valve disc; 12. soft sealing gasket; 13. nut; 14. hard sealing gasket. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-2 In order to achieve the above-mentioned high sealing purpose, the utility model provides the following technical solutions: a high sealing stop valve, including a valve body 1, a liquid outlet cavity 2 and a liquid inlet cavity 3 are opened inside the valve body 1, the liquid outlet cavity 2 is connected to the liquid inlet cavity 3, a valve disc 11 is fixedly connected between the walls of the connection between the liquid outlet cavity 2 and the liquid inlet cavity 3, the inner wall of the valve disc 11 is screwed with a valve stem 9 whose end extends to the outside of the valve body 1, and a hand ring 10 is fixedly connected to the top of the valve stem 9.

[0025] Among them, the outer side of the bracelet 10 is provided with an anti-slip and heat-insulating cover. By providing the anti-slip and heat-insulating cover, the staff can prevent slipping and keep warm when using the bracelet 10, enhance the twisting efficiency, and improve the comfort of use.

[0026] It should be noted that in the above embodiment, the valve stem 9 mainly functions to drive the valve flap 11 to perform linear motion when rotating, so as to control the flow of the fluid.

[0027] In addition, in order to enhance the overall sealing and leak-proof capability of the exterior of the stop valve, an external sealing component is fixedly connected to the top of the valve body 1 to seal the external area.

[0028] Among them, the outer sealing component includes a lower valve cover 4, the bottom of the lower valve cover 4 is fixedly connected to the valve body 1, the top of the lower valve cover 4 is bolted to the upper valve cover 5, the outer wall surface of the connection between the lower valve cover 4 and the upper valve cover 5 is tightly sleeved with an outer sealing ring 6, the upper and lower sides of the outer sealing ring 6 are fixedly connected with a sealing sleeve 7, and the outer sides of the lower valve cover 4 and the upper valve cover 5 are tightly fitted with the sealing sleeve 7.

[0029] It can be understood in this embodiment that the sealing sleeve 7 is made of rubber material, which can prevent leakage and seepage from occurring during the close fitting process, thereby improving the effective anti-leakage function for the external area of ​​the stop valve.

[0030] In addition, in order to improve the internal sealing capability of the stop valve, a bracket 8 is fixedly connected to the top of the outer sealing component, and the inner wall of the bracket 8 is threadedly connected to the valve stem 9.

[0031] The inner sealing component includes a hard sealing gasket 14 , the outer side of the hard sealing gasket 14 is press-fitted to the valve body 1 , the inner wall of the hard sealing gasket 14 is fixedly connected with a nut 13 , and the inner wall of the nut 13 is threadedly connected to the valve stem 9 .

[0032] It is understandable that the hard sealing gasket 14 is at least one of a stainless steel sealing gasket, a titanium sealing gasket, a graphite sealing gasket and an aluminum sealing gasket, and the types of the above gaskets can be adjusted according to the actual use environment.

[0033] The inner sealing component further includes a soft sealing gasket 12 , which is pressed onto the bottom of the valve flap 11 , and is tightly fitted to the lower wall surface of the connection point between the liquid inlet chamber 3 and the liquid outlet chamber 2 .

[0034] It should also be noted that in the above embodiment, the soft sealing gasket 12 is a rubber sealing gasket.

[0035] Since the soft sealing gasket 12 pressed together with the valve flap 11 is made of rubber, it has a certain deformation capacity. After being subjected to fluid pressure for a long time, it can perform self-deformation buffering to prevent the sealing function from being damaged and causing fluid leakage.

[0036] The working principle of this embodiment is as follows:

[0037] By moving the sealing piece at the connection of the traditional stop valve cover downward, setting a hard sealing gasket 14 at the connection between the lower valve cover 4 and the valve body 1, and then installing an outer sealing ring 6 at the connection between the lower valve cover 4 and the upper valve cover 5 and wrapping a part of the valve cover with a sealing sleeve 7, the external sealing ability of the stop valve can be strengthened without affecting the original internal sealing, and the occurrence of trace liquid seepage can be avoided. By adding a soft sealing gasket 12 with deformation ability made of rubber at the connection between the valve disc 11 and the internal chamber of the valve body 1, the service life of the soft sealing gasket 12 can be enhanced under the impact of high-flow fluid, and the reliability of the internal sealing performance can be enhanced, thereby achieving the purpose of high sealing performance as a whole.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high sealing stop valve, comprising: A valve body (1) is provided with a liquid outlet cavity (2) and a liquid inlet cavity (3) inside, and the liquid outlet cavity (2) is communicated with the liquid inlet cavity (3); A valve flap (11) is provided between the wall surfaces at the connection point between the liquid outlet chamber (2) and the liquid inlet chamber (3), and a valve stem (9) having one end extending to the outside of the valve body (1) is screwed to the inner wall of the valve flap (11); A hand ring (10) is provided on the top of the valve stem (9); The feature is that: an external sealing component is provided on the top of the valve body (1) for sealing the external area; A bracket (8) is provided on the top of the outer sealing component, and the inner wall of the bracket (8) is threadedly connected to the valve stem (9); An inner sealing component is arranged inside the valve body (1) to enhance the sealing performance of the inner area.

2. A high sealing stop valve according to claim 1, characterized in that: The outer sealing assembly comprises a lower valve cover (4), the bottom of which is fixedly connected to the valve body (1), the top of which is bolted to an upper valve cover (5), an outer sealing ring (6) is tightly sleeved on the outer wall surface at the connection point between the lower valve cover (4) and the upper valve cover (5), and a sealing sleeve (7) is fixedly connected to the upper and lower sides of the outer sealing ring (6), and the outer sides of the lower valve cover (4) and the upper valve cover (5) are tightly fitted to the sealing sleeve (7).

3. A high sealing stop valve according to claim 1, characterized in that: The inner sealing component comprises a hard sealing gasket (14), the outer side of the hard sealing gasket (14) is pressed onto the valve body (1), the inner wall of the hard sealing gasket (14) is fixedly connected to a nut (13), and the inner wall of the nut (13) is threadedly connected to the valve stem (9).

4. A high sealing stop valve according to claim 1, characterized in that: The inner sealing component also includes a soft sealing gasket (12), which is pressed onto the bottom of the valve flap (11) and is tightly fitted to the lower wall surface of the connection between the liquid inlet chamber (3) and the liquid outlet chamber (2).

5. A high sealing stop valve according to claim 1, characterized in that: The outer side of the bracelet (10) is provided with a non-slip heat-insulating cover.

6. A high sealing stop valve according to claim 3, characterized in that: The hard sealing gasket (14) is at least one of a stainless steel sealing gasket, a titanium sealing gasket, a graphite sealing gasket and an aluminum sealing gasket.

7. A high sealing stop valve according to claim 4, characterized in that: The soft sealing gasket (12) is a rubber sealing gasket.

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