High-sealing anti-corrosion stop valve

Abstract

The utility model relates to the technical field of stop valves, and discloses a high-sealing anti-corrosion stop valve which comprises a valve body, a sealing assembly is arranged in the valve body and comprises a valve body, a valve rod is fixedly connected to the inner wall of the valve body, a tension spring is installed on the upper portion of the outer wall of the valve rod in a sleeved mode, and the valve body is fixedly connected with the valve rod. A plurality of sealing gaskets which are attached together are arranged below the tension spring, a supporting spring is arranged below the sealing gaskets, the sealing gaskets and the supporting spring are installed on the outer wall of the valve rod in a sleeving mode, and a limiting clamping base is arranged below the supporting spring. Therefore, when the valve element is closed or opened, the tension spring and the supporting spring can provide supporting force for the multiple sealing gaskets, the sealing gaskets are attached to the connecting flange all the time, the sealing state is kept, medium leakage is prevented, later maintenance and overhaul are not needed through the elasticity of the two springs, and the service life of the valve element is prolonged. The sealing performance is greatly improved; and the service life is greatly prolonged.

Description

Technical Field

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

[0002] The stop valve, also known as the gate valve, is a forced sealing valve. Therefore, when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to not leak. When the medium enters the valve from below the valve disc, the resistance that the operating force needs to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem must be larger, otherwise the valve stem will bend. There are three types of connection methods: flange connection, threaded connection, and welding connection. Since the emergence of self-sealing valves, the flow direction of the medium of the stop valve has changed to enter the valve cavity from above the valve disc. At this time, under the action of the medium pressure, the force to close the valve is small, while the force to open the valve is large, and the diameter of the valve stem can be reduced accordingly. At the same time, under the action of the medium, this type of valve is also more tight.

[0003] For example, Chinese patent "CN212360827U" discloses a high-sealing stop valve, which proposes: a sealing sleeve is provided on the outer side of the valve core, an arc-shaped protrusion is formed in the middle of the lower end of the sealing sleeve, the protrusion contacts the valve port, a sealing ring with a triangular cross-section is provided on the outer side of the protrusion, the upper end of the sealing ring is fixedly connected to the sealing sleeve, an oblique opening matching the sealing ring is provided at the opening of the valve port, the oblique opening gradually becomes smaller from top to bottom, a liquid inlet and a liquid outlet are respectively provided on both sides of the valve body, a filter is provided on the inner side of the openings of the liquid inlet and the liquid outlet, a fluoroplastic layer is provided in the valve body, and the thickness of the fluoroplastic layer is 0.4-1.3mm, so as to provide a high-sealing, filtering, corrosion-resistant and wear-resistant stop valve.

[0004] It can be seen from the above-mentioned device that although a stop valve with filtering function is proposed, the current technical solution still has the following shortcomings:

[0005] After long-term use, the sealing gaskets and sealing rings of existing stop valves will age and their elasticity will decrease. It is necessary to regularly inspect the stop valves and replace the internal sealing gaskets to avoid medium leakage caused by poor sealing. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the utility model provides a high-sealing and anti-corrosion stop valve, which has the advantages of providing pressure to a plurality of sealing gaskets by arranging two springs so that the plurality of sealing gaskets can always remain in a sealed state, thereby preventing medium leakage and requiring no overhaul and maintenance. This solves the problem that after long-term use, the sealing gaskets and sealing rings of the existing stop valves will age and their elasticity will decrease, requiring regular overhaul of the stop valves and replacement of the internal sealing gaskets to prevent medium leakage due to poor sealing.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-sealing and anti-corrosion stop valve, comprising a valve body, a sealing assembly is arranged inside the valve body, the sealing assembly comprises a valve, a valve stem is fixedly connected to the inner wall of the valve, a tension spring is sleeved and installed on the upper part of the outer wall of the valve stem, a plurality of sealing gaskets fitted together are arranged below the tension spring, a support spring is arranged below the sealing gasket, the sealing gasket and the support spring are both sleeved and installed on the outer wall of the valve stem, a limit seat is arranged below the support spring, the limit seat is installed inside the valve body through outer wall thread engagement, and a screw is fixedly connected to the lower end of the valve stem.

[0010] Preferably, the screw rod is installed inside the limit clamp seat through surface thread engagement, and the screw rod is connected to the upper support spring through the surface thread protrusion.

[0011] Preferably, a valve core is fixedly connected below the screw rod, the valve core is configured to be conical, and a sealing gasket is provided on the outer wall of the valve core.

[0012] Preferably, a water inlet is provided on one side of the valve body, a water outlet is provided on the other side of the valve body, and a valve pipe is provided above the valve body.

[0013] Preferably, a connecting flange is provided above the valve tube, a fixing nut is fixedly connected above the connecting flange, a fixing screw is installed inside the fixing nut through threaded engagement, and a partition is provided inside the valve body.

[0014] Preferably, the tension spring is arranged inside the fixing nut, the upper end of the tension spring is in contact with the upper part of the inner wall of the fixing nut, and the tension spring is sealingly in contact with the inner wall of the connecting flange.

[0015] Preferably, the valve core is sealed in a groove opened in the middle of the partition through a sealing gasket.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a high-sealing anti-corrosion stop valve, which has the following beneficial effects:

[0018] 1. The high-sealing and anti-corrosion stop valve, through the cooperation between the support spring and the tension spring, can achieve that when the valve core is closed or opened, the tension spring and the support spring can provide support force for several sealing gaskets, so that the sealing gaskets always fit the connecting flange and maintain a sealed state to prevent medium leakage. In addition, the elasticity of the two springs can achieve the goal of no need for subsequent maintenance and repair, and the sealing and service life are greatly improved.

[0019] 2. The high-sealing and anti-corrosion stop valve ensures that the valve core can fit tightly in the groove in the middle of the partition by setting the valve core to a cone and arranging a sealing gasket on the outer wall of the valve core. This fit forms a barrier to prevent the medium from passing through the valve body. The conical design of the valve core enables the valve to have the ability of adaptive flow regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall front view structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the overall side view structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the valve body of the utility model;

[0023] Figure 4 It is a cross-sectional structural plan view of the utility model.

[0024] The numbers in the figure are:

[0025] 1. Valve body; 11. Water inlet; 12. Water outlet; 13. Valve pipe; 14. Connecting flange; 15. Fixing nut; 16. Fixing screw; 2. Sealing assembly; 21. Valve; 22. Valve stem; 23. Tension spring; 24. Sealing gasket; 25. Support spring; 26. Limiting seat; 27. Screw rod; 28. Valve core; 29. ​​Sealing gasket. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-2, a high sealing and anti-corrosion stop valve comprises a valve body 1, which is the main part of the valve and is usually made of corrosion-resistant materials to adapt to different working environments. A water inlet 11 is provided on one side of the valve body 1 for connecting the input pipeline so that the medium can enter the valve body 1, and a water outlet 12 is provided on the other side of the valve body 1 for connecting the output pipeline so that the medium can flow out of the valve. A valve pipe 13 is provided above the valve body 1, and a connecting flange 14 is provided above the valve pipe 13. A fixing nut 15 is fixedly connected above the connecting flange 14, and a fixing screw 16 is installed inside the fixing nut 15 through threaded engagement. The fixing nut 15 has threads inside and can be threadedly engaged with the fixing screw 16. By rotating the fixing screw 16, the degree of tightening with the fixing nut 15 can be adjusted, thereby fixing or loosening the connecting flange 14. A partition 17 is provided inside the valve body 1. In addition, in order to ensure high sealing and anti-corrosion capabilities, each component of the valve will be precisely processed and specially treated, such as grinding of the sealing surface, spraying of anti-rust paint, etc.

[0028] See also Figure 3-4A sealing assembly 2 is arranged inside the valve body 1. The sealing assembly 2 includes a valve 21. A valve stem 22 is fixedly connected to the inner wall of the valve 21. The valve stem 22 is a driving component of the valve 21 and is used to transmit the rotation or lifting action. A tension spring 23 is sleeved and installed on the upper part of the outer wall of the valve stem 22. A plurality of sealing gaskets 24 that fit together are arranged below the tension spring 23. The function of the tension spring 23 is to provide a downward force when the valve is closed, so that the sealing gasket 24 fits tightly on the valve seat, thereby achieving high sealing performance. At the same time, the tension spring 23 also plays a buffering role to reduce the impact and wear when the valve is closed. The sealing gasket 24 is made of corrosion-resistant and wear-resistant materials to ensure the reliability of long-term use. Below the sealing gasket 24 A support spring 25 is provided, and the sealing gasket 24 and the support spring 25 are both sleeved and installed on the outer wall of the valve stem 22. A limit seat 26 is provided below the support spring 25. The limit seat 26 is installed inside the valve body 1 through the outer wall thread engagement. The function of the limit seat 26 is to limit the up and down movement range of the valve stem 22 and the sealing component 2, so as to ensure that the valve 21 can be stably opened and closed. A screw rod 27 is fixedly connected to the lower end of the valve stem 22. The screw rod 27 is installed inside the limit seat 26 through the surface thread engagement. The screw rod 27 is connected to the upper support spring 25 through the surface thread protrusion. A valve core 28 is fixedly connected below the screw rod 27. The valve core 28 is set to be conical. The conical design of the valve core 28 enables the valve to have the ability of adaptive flow regulation. No matter how the flow of the medium changes, the conical valve core 28 can automatically adjust the fit with the groove of the partition 17, thereby realizing accurate control of the flow. This adaptive characteristic enables the valve to adapt to various complex working conditions and ensures the stable operation of the system. The outer wall of the valve core 28 is provided with a sealing gasket 29, which is used to form a seal with the groove opened in the middle of the partition 17 when the valve 21 is closed. The sealing gasket 29 is usually made of soft, corrosion-resistant materials to ensure high sealing. The tension spring 23 is arranged inside the fixing nut 15, and the upper end of the tension spring 23 is attached to the upper part of the inner wall of the fixing nut 15. The tension spring 23 is sealed and attached to the inner wall of the connecting flange 14, and the valve core 28 is sealed and attached to the groove opened in the middle of the partition 17 through the sealing gasket 29.

[0029] Working principle: First, when the valve 21 needs to be closed, the operator performs this action by rotating or lifting the valve stem 22. The rotation or lifting movement of the valve stem 22 drives the screw 27 to rotate accordingly in the limit holder 26. The rotation of the screw 27 causes the valve core 28 to move down along the axial direction of the valve body 1. The downward movement of the valve core 28 combined with its tapered design ensures that it can fit tightly in the groove in the middle of the partition 17. This fit forms a barrier that prevents the medium from passing through the valve body 1. The tapered design of the valve core 28 enables the valve to have the ability to adjust the flow rate adaptively. Regardless of how the flow rate of the medium changes, the tapered valve core 28 can automatically adjust the fit with the groove of the partition 17, thereby achieving precise control of the flow rate. This adaptive characteristic enables the valve to adapt to various complex working conditions and ensures the stable operation of the system. During this process, the tension spring 23 is compressed and generates a downward force. This force not only enhances the close fit between the sealing gasket 24 and the connecting flange 14 , but also helps maintain the close contact between the valve core 28 and the groove of the partition plate 17 , thereby ensuring the high sealing performance of the valve body 1 .

[0030] Secondly, the closing process is opposite. When the valve needs to be opened, the operator performs this action by rotating the valve stem 22. The rotation of the valve stem 22 drives the screw rod 27 to rotate in the opposite direction in the limit clamp 26. The rotation of the screw rod 27 causes the valve core 28 to move up along the axial direction of the valve body 1. When the valve core 28 is completely separated from the groove in the middle of the partition 17, the medium can pass through the valve body 1 smoothly. In this process, the support spring 25 is compressed and generates an upward force. This force ensures that even if the valve core 28 moves up, the sealing gasket 24 can remain tightly fitted, thereby preventing the medium from leaking from the connecting flange 14.

[0031] It is worth noting that, whether the valve 21 is closed or open, the tension spring 23 and the support spring 25 are in a compressed state. This design not only prepares for the next switching action, but also enhances the stability of the valve during operation.

[0032] 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.

[0033] 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 and corrosion resistant stop valve, comprising a valve body (1), characterized in that: A sealing assembly (2) is arranged inside the valve body (1), and the sealing assembly (2) comprises a valve (21), the inner wall of the valve (21) is fixedly connected to a valve stem (22), a tension spring (23) is sleeved and installed on the upper part of the outer wall of the valve stem (22), a plurality of sealing gaskets (24) are arranged below the tension spring (23) and are fitted together, and a support spring (25) is arranged below the plurality of sealing gaskets (24), the sealing gaskets (24) and the support springs (25) are both sleeved and installed on the outer wall of the valve stem (22), a limit clamping seat (26) is arranged below the support spring (25), and the limit clamping seat (26) is installed inside the valve body (1) through outer wall thread engagement, and a screw rod (27) is fixedly connected to the lower end of the valve stem (22).

2. The high sealing and anti-corrosion stop valve according to claim 1 is characterized in that: The screw rod (27) is installed inside the limit clamping seat (26) through surface thread engagement, and the screw rod (27) is connected to the upper support spring (25) through the surface thread protrusion.

3. The high sealing and anti-corrosion stop valve according to claim 2 is characterized in that: A valve core (28) is fixedly connected below the screw rod (27); the valve core (28) is arranged in a cone shape; and a sealing gasket (29) is arranged on the outer wall of the valve core (28).

4. The high sealing and anti-corrosion stop valve according to claim 1 is characterized in that: A water inlet (11) is provided on one side of the valve body (1), a water outlet (12) is provided on the other side of the valve body (1), and a valve pipe (13) is provided above the valve body (1).

5. The high sealing and anti-corrosion stop valve according to claim 4 is characterized in that: A connecting flange (14) is arranged above the valve tube (13), a fixing nut (15) is fixedly connected above the connecting flange (14), a fixing screw (16) is installed inside the fixing nut (15) through threaded engagement, and a partition plate (17) is arranged inside the valve body (1).

6. The high sealing and anti-corrosion stop valve according to claim 5, characterized in that: The tension spring (23) is arranged inside the fixing nut (15), the upper end of the tension spring (23) is in contact with the upper inner wall of the fixing nut (15), and the tension spring (23) is sealingly in contact with the inner wall of the connecting flange (14).

7. The high sealing and anti-corrosion stop valve according to claim 3 is characterized in that: The valve core (28) is sealed and fitted in a groove opened in the middle of the partition (17) through a sealing gasket (29).

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