Leak-proof stop valve

Abstract

The utility model discloses a leakproof stop valve in the technical field of stop valves, which comprises a valve casing and a bonnet body, the bonnet body is mounted at the top of the valve casing, a cut-off adjusting part is arranged inside the valve casing and the bonnet body, an elastic sealing part is further connected between the valve casing and the bonnet body, the elastic sealing part comprises two groups of sealing outer rings, and the two groups of sealing outer rings are connected with the bonnet body. According to the anti-leakage stop valve designed in the scheme, the elastic sealing piece is additionally arranged between the middle valve shell and the valve deck body, the valve shell and the valve deck body can be always kept in a good sealing state, the elastic sealing piece is composed of the outer sealing rings, the inner connecting ring and the compression spring, and therefore the sealing effect is good. When the relative position between the sealing outer ring and the connecting inner ring is changed due to thermal expansion and cold contraction or the high pressure effect of fluid in the valve shell, the compression spring can elastically deform and automatically compensate a tiny gap, and therefore the gap possibly generated between the valve shell and the valve cover body can be effectively filled, and the long-term stable sealing effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and in particular to a leak-proof gate valve. Background Technology

[0002] A gate valve, also known as a shut-off valve, is a type of valve specifically designed to control the flow of fluids (such as liquids and gases). Its main working principle is based on the sealing fit between the valve disc and the valve seat. In the open state, it allows the medium to flow freely, while in the closed state, it completely blocks the flow of fluid. Gate valves are simple in structure, easy to operate, and have good sealing performance, thus they are widely used in chemical, petroleum, natural gas, and power industries. By precisely controlling the flow of the medium, gate valves not only help ensure the normal operation of the system but also can quickly cut off the fluid in emergencies, ensuring equipment and personnel safety.

[0003] Currently, existing gate valves, due to the lack of anti-leakage protection components between the valve body and valve cover, are prone to developing tiny gaps between the valve body and valve cover under harsh conditions such as high pressure, high temperature, or corrosive media. This is because the fluid inside the valve body can easily create these gaps due to thermal expansion and contraction and the pressure. At the same time, the valve disc and valve seat sealing surfaces, which are used to regulate complex fluids such as high pressure, high temperature, or corrosive media, often do not fit tightly enough due to design or manufacturing precision issues, further reducing the sealing effect and significantly increasing the risk of fluid leakage. Therefore, there are certain safety hazards during use.

[0004] Based on this, we propose a leak-proof shut-off valve to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Therefore, the purpose of this utility model is to provide a leak-proof gate valve that can solve the problem of fluid leakage safety hazards caused by thermal expansion and contraction and high pressure under harsh working conditions such as high pressure, high temperature and corrosive media. This is due to the lack of leak-proof protection components between the valve body and the valve cover and the poor sealing surface between the valve disc and the valve seat.

[0007] To solve the above-mentioned technical problems, this utility model provides a leak-proof shut-off valve, which adopts the following technical solution: it includes a valve body and a valve cover, the valve cover is installed on the top of the valve body, a flow-blocking adjustment component is provided inside the valve body and the valve cover, and an elastic sealing component is connected between the valve body and the valve cover. The elastic sealing component includes two sets of sealing outer rings, and a connecting inner ring is installed between the two sets of sealing outer rings.

[0008] The sealing outer ring has a sealing adjustment groove inside. The inner side of the sealing adjustment groove and the outer side of the connecting inner ring each have two sets of positioning grooves. A compression spring is also connected between the two sets of positioning grooves.

[0009] Optionally, the flow-stopping adjustment component includes a connecting rod, one end of which is equipped with an adjusting handwheel, and the end of the connecting rod away from the adjusting handwheel is provided with a flow-stopping valve flap, and a first sealing groove is also provided around the bottom of the flow-stopping valve flap.

[0010] Optionally, a fixed flange is installed on the top of the valve body, a first embedded groove is provided on the inner side of the fixed flange, and a second sealing groove is also provided inside the valve body.

[0011] Optionally, the second sealing groove is structurally matched with the first sealing groove, and the second sealing groove and the first sealing groove are in a transition fit.

[0012] Optionally, a connecting rod positioning bracket is installed on the top of the valve cover body, and a second embedded groove is provided at the bottom of the valve cover body.

[0013] Optionally, the second embedded groove, the first sealing groove, and the sealing outer ring structure are matched, and the second embedded groove, the first sealing groove, and the sealing outer ring are in a transition fit.

[0014] In summary, this utility model has at least one of the following beneficial effects:

[0015] 1. The leak-proof shut-off valve designed in this scheme can maintain a good sealing state between the valve body and the valve cover by adding an elastic sealing element between the valve body and the valve cover. The elastic sealing element consists of a sealing outer ring, a connecting inner ring, and a compression spring. When the relative position between the sealing outer ring and the connecting inner ring changes due to thermal expansion and contraction or high pressure of the fluid inside the valve body, the compression spring will undergo elastic deformation and automatically compensate for the small gaps, thereby effectively filling the gaps that may occur between the valve body and the valve cover, and achieving a long-term stable sealing effect.

[0016] 2. The leak-proof shut-off valve designed in this scheme improves the sealing performance between the valve disc and the valve seat through the optimized design of the flow-stopping adjustment component. The bottom of the flow-stopping valve disc is provided with a first sealing groove around its perimeter, which forms a transition fit with the second sealing groove inside the valve body. When the flow-stopping valve disc is closed, the first sealing groove and the second sealing groove fit tightly together, which can effectively prevent fluid from leaking between the valve disc and the valve seat, achieving a higher level of sealing performance. At the same time, the second embedded groove at the bottom of the valve cover body also forms a transition fit with the first sealing groove and the sealing outer ring, further enhancing the overall sealing effect and improving the applicability of the shut-off valve under harsh conditions such as high temperature, high pressure and corrosive media. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the elastic sealing element structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the compression spring structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the flow-blocking adjustment component of this utility model;

[0022] Figure 5 This is a schematic diagram of the first sealing groove structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the second sealing groove structure of this utility model;

[0024] Figure 7 This is a schematic diagram of the second embedded groove structure of this utility model.

[0025] Explanation of reference numerals in the attached drawings: 1. Valve body; 2. Valve cover; 3. Flow control adjustment element; 4. Elastic seal; 5. Sealing outer ring; 6. Connecting inner ring; 7. Sealing adjustment groove; 8. Positioning groove; 9. Compression spring; 10. Linkage rod; 11. Adjusting handwheel; 12. Flow control valve disc; 13. First sealing groove; 14. Fixed flange; 15. First embedded groove; 16. Second sealing groove; 17. Linkage positioning bracket; 18. Second embedded groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example: Refer to Figures 1 to 7 This utility model provides an embodiment of a leak-proof shut-off valve, comprising a valve body 1 and a valve cover 2. The valve cover 2 is mounted on the top of the valve body 1. A flow-blocking adjustment component 3 is provided inside the valve body 1 and the valve cover 2. An elastic sealing component 4 is also connected between the valve body 1 and the valve cover 2. The elastic sealing component 4 includes two sets of sealing outer rings 5, and a connecting inner ring 6 is installed between the two sets of sealing outer rings 5. A sealing adjustment groove 7 is provided inside the sealing outer ring 5. Two sets of positioning grooves 8 are provided on the inner side of the sealing adjustment groove 7 and the outer side of the connecting inner ring 6. A compression spring 9 is also connected between the two sets of positioning grooves 8. Through the structural design of the sealing adjustment groove 7 and the positioning grooves 8, space is provided for the installation and function of the compression spring 9. The elastic deformation of the compression spring 9 can drive the sealing outer ring 5 and the connecting inner ring 6 to move relative to each other, which can adapt to the small deformation and displacement between the valve body 1 and the valve cover 2, realize sealing compensation, and ensure that the valve maintains good sealing performance under various working conditions.

[0028] The flow-stopping regulating component 3 includes a connecting rod 10, with an adjusting handwheel 11 mounted on one end of the connecting rod 10. A flow-stopping valve disc 12 is located at the end of the connecting rod 10 away from the adjusting handwheel 11. A first sealing groove 13 is also formed around the bottom of the flow-stopping valve disc 12. This flow-stopping regulating component 3, composed of the connecting rod 10, adjusting handwheel 11, flow-stopping valve disc 12, and first sealing groove 13, is used to control the opening and closing of the fluid. By manually operating the adjusting handwheel 11, the connecting rod 10 is moved, thereby controlling the raising and lowering of the flow-stopping valve disc 12. When the flow-stopping valve disc 12 moves upward, the valve disc and valve seat... The increased flow area allows fluid to pass through, thus opening the valve. When the shut-off valve disc 12 moves downward and comes into contact with the valve seat sealing surface, the first sealing groove 13 cooperates with the second sealing groove 16 inside the valve body 1 to form a tight sealing structure, effectively preventing fluid from passing through and closing the valve. A fixed flange 14 is installed on the top of the valve body 1. A first embedded groove 15 is provided on the inner side of the fixed flange 14. A second sealing groove 16 is also provided inside the valve body 1. By adding the fixed flange 14 to the top of the valve body 1, the valve cover 2 can be connected and fixed to the top of the valve body 1.

[0029] The second sealing groove 16 is structurally matched with the first sealing groove 13, and there is a transition fit between the second sealing groove 16 and the first sealing groove 13. Through the structural design of the transition fit between the second sealing groove 16 and the first sealing groove 13, when the shut-off valve disc 12 moves down to the closed position, the first sealing groove 13 and the second sealing groove 16 fit tightly together to form a more tight sealing structure, effectively preventing fluid leakage from between the valve disc and the valve seat, and ensuring that the valve can completely block the passage of fluid in the closed state. A connecting rod positioning bracket 17 is installed on the top of the valve cover body 2, and a second embedded groove 18 is opened at the bottom of the valve cover body 2. By adding a connecting rod positioning bracket on the top of the valve cover body 2... 17. It can support and fix the flow-blocking adjustment component 3 connected between the valve body 1 and the valve cover 2. The second embedded groove 18, the first sealing groove 13 and the sealing outer ring 5 are structurally matched. The second embedded groove 18, the first sealing groove 13 and the sealing outer ring 5 are in transition fit. Through the structural design of the transition fit between the second embedded groove 18, the first sealing groove 13 and the sealing outer ring 5, when the valve is closed, the sealing outer ring 5 can fit tightly with the second embedded groove 18 and the first sealing groove 13 to form a continuous and complete sealing surface, which can effectively prevent fluid from leaking between the valve body 1 and the valve cover 2 and between the flow-blocking valve disc 12 and the valve seat.

[0030] Working principle: The leakage shut-off valve designed in this scheme uses an elastic sealing element 4, which includes a sealing outer ring 5, a connecting inner ring 6, and a compression spring 9, to connect the valve body 1 and the valve cover 2. When the fluid inside the valve body 1 experiences pressure changes due to thermal expansion and contraction or high pressure, the elastic deformation of the compression spring 9 automatically adjusts the relative position between the sealing outer ring 5 and the connecting inner ring 6, filling any tiny gaps that may occur between the valve body 1 and the valve cover 2, thus maintaining a tight seal at all times.

[0031] The leakage shut-off valve designed in this scheme has a first sealing groove 13 around the bottom of the shut-off valve disc 12 in the shut-off regulating component 3, and a second sealing groove 16 matching the structure inside the valve body 1. The two are in a transition fit, so that when the shut-off valve disc 12 is in contact with the valve seat sealing surface, the first sealing groove 13 and the second sealing groove 16 cooperate with each other to form a tighter sealing structure, effectively preventing fluid leakage from the shut-off valve disc 12 and the valve seat. At the same time, the second embedded groove 18 at the bottom of the valve cover body 2 is also in a transition fit with the first sealing groove 13 and the sealing outer ring 5, further enhancing the sealing performance of the entire valve and ensuring that fluid leakage can be effectively prevented under various working conditions.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leak-proof shut-off valve, comprising a valve body (1) and a valve cover (2), wherein the valve cover (2) is mounted on the top of the valve body (1), characterized in that: The valve housing (1) and valve cover (2) are provided with a flow-blocking adjustment component (3). An elastic sealing component (4) is also connected between the valve housing (1) and valve cover (2). The elastic sealing component (4) includes two sets of sealing outer rings (5). A connecting inner ring (6) is installed between the two sets of sealing outer rings (5). The sealing outer ring (5) has a sealing adjustment groove (7) inside. The inner side of the sealing adjustment groove (7) and the outer side of the connecting inner ring (6) are provided with two sets of positioning grooves (8). A compression spring (9) is also connected between the two sets of positioning grooves (8).

2. The leak-proof shut-off valve according to claim 1, characterized in that: The flow-stopping adjustment component (3) includes a connecting rod (10), one end of which is equipped with an adjusting handwheel (11), and the other end of the connecting rod (10) away from the adjusting handwheel (11) is provided with a flow-stopping valve disc (12). A first sealing groove (13) is also provided around the bottom of the flow-stopping valve disc (12).

3. The leak-proof shut-off valve according to claim 2, characterized in that: A fixed flange (14) is installed on the top of the valve body (1), and a first inner groove (15) is provided on the inner side of the fixed flange (14). A second sealing groove (16) is also provided inside the valve body (1).

4. The leak-proof shut-off valve according to claim 3, characterized in that: The second sealing groove (16) is structurally matched with the first sealing groove (13), and there is a transition fit between the second sealing groove (16) and the first sealing groove (13).

5. A leak-proof shut-off valve according to claim 4, characterized in that: The valve cover (2) is equipped with a connecting rod positioning bracket (17) on the top and a second embedded groove (18) is provided at the bottom of the valve cover (2).

6. A leak-proof shut-off valve according to claim 5, characterized in that: The second embedded groove (18), the first sealing groove (13) and the sealing outer ring (5) are structurally matched, and the second embedded groove (18), the first sealing groove (13) and the sealing outer ring (5) are in transition fit.

Images