Energy-saving combined stop valve

Abstract

The utility model relates to the technical field of stop valves, and discloses an energy-saving combined stop valve which solves the problem that an existing stop valve is poor in sealing effect and comprises a valve body, a cover plate is arranged at the top end of the valve body, a support is arranged at the top end of the cover plate, a valve rod is arranged in the support in a penetrating mode, and a hand wheel is arranged at the top end of the valve rod. A combined valve plate is arranged at the bottom end of the valve rod, a packing sealing piece and a sealing pressing piece are arranged between the valve rod and the cover plate, the combined valve plate is composed of a valve plate body, a connecting base, a first O-shaped sealing ring, a sealing clamping ring and a passive sealing assembly, and the connecting base is fixedly connected to the middle position of the top end of the valve plate body and connected with the valve rod. The first O-shaped sealing ring is connected to the side edge of the top end of the valve plate body, the sealing clamping ring is fixedly connected to the side edge of the bottom end of the valve plate body, and the passive sealing assembly is connected to the middle position of the bottom end of the valve plate body. By means of the stop valve, the sealing effect can be improved, the situation of leakage is avoided, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of stop valves, in particular to an energy-saving combined stop valve. Background Art

[0002] The stop valve is one of the most widely used valves. The friction between the sealing surfaces during the opening and closing process of the stop valve is small, it is relatively durable, the opening height is not large, it is easy to manufacture and maintain, and it is suitable not only for medium and low pressures, but also for high pressures.

[0003] The stop valve achieves sealing through the fit between its internal valve plate and valve body, but the traditional stop valve has a single sealing structure, which will lead to poor sealing effect and seepage during long-term use. In addition, when the existing stop valve is in the open state, it is impossible to achieve auxiliary sealing on the top of the valve body, and the fluid can easily impact the cover plate and packing seal. Under long-term impact, it will affect the sealing effect of the valve body itself and cause fluid leakage, resulting in poor use effect. Therefore, the present application proposes an energy-saving combined stop valve. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an energy-saving combined stop valve, which effectively solves the problem of poor sealing effect of the existing stop valve.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an energy-saving combined stop valve, comprising a valve body, a cover plate is arranged at the top end of the valve body, a bracket is fixedly arranged at the top end of the cover plate, a valve stem is inserted inside the bracket, a hand wheel is fixedly arranged at the top end of the valve stem, the valve stem is inserted into the cover plate and the valve body, a combined valve plate is arranged at the bottom end of the valve stem, a packing seal and a sealing pressure piece are arranged between the valve stem and the cover plate, the combined valve plate is composed of a valve plate body, a connecting seat, an O-ring, a sealing retaining ring and a passive sealing assembly, the connecting seat is fixedly connected to the middle position of the top end of the valve plate body and connected to the valve stem, the O-ring is connected to the side of the top end of the valve plate body, the sealing retaining ring is fixedly connected to the side of the bottom end of the valve plate body, and the passive sealing assembly is connected to the middle position of the bottom end of the valve plate body.

[0006] Preferably, the sealing clamp ring and the valve plate body are an integrated structure, and a threaded groove matching the passive sealing component is provided in the middle of the bottom end of the valve plate body.

[0007] Preferably, the passive sealing assembly is composed of a screw, a support plate, a rubber sealing body and a force-bearing plate, the support plate is fixedly connected to the bottom end of the screw, the screw is connected to the thread groove, the rubber sealing body is sleeved on the outer surface of the support plate, and the force-bearing plate is fixedly connected to the middle position of the bottom end of the rubber sealing body.

[0008] Preferably, the arc-shaped outer surface of the rubber sealing body is provided with a first annular protrusion and a second annular protrusion, and the inner side of the rubber sealing body is provided with a plurality of annular inner grooves.

[0009] Preferably, an annular sealing clamping groove matching with the valve plate body and the O-ring is provided at the top end of the inner part of the valve body.

[0010] Preferably, a lapped cone matching the valve plate body is provided at the bottom end of the valve body, a sealing gasket is fixedly provided at the top of the lapped cone, an annular sealing clamping groove 2 matching the sealing clamping ring is opened at the top of the lapped cone, and an O-ring 2 is provided at the bottom end of the annular sealing clamping groove 2.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] (1) During operation, by providing a sealing clamp ring, a lapped cone, a sealing gasket, a second annular sealing clamping groove, a second O-ring, and a passive sealing assembly consisting of a screw, a support plate, a rubber sealing body, and a force-bearing plate, the overall sealing effect can be improved when the stop valve is closed to prevent fluid leakage;

[0013] (2) By providing an O-ring and an annular sealing clamping groove, auxiliary sealing can be achieved when the stop valve is opened, thereby preventing the fluid from impacting the cover plate and the packing seal, thereby improving the sealing performance of the connection between the cover plate and the valve body and the sealing performance of the connection between the valve stem and the cover plate, avoiding fluid leakage and increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0015] In the attached picture:

[0016] Figure 1 This is one of the schematic diagrams of the structure of the energy-saving combined stop valve of the utility model;

[0017] Figure 2 This is the second schematic diagram of the structure of the energy-saving combined stop valve of the utility model;

[0018] Figure 3 For this utility model Figure 1 A partial enlarged view of

[0019] Figure 4 For this utility model Figure 2 A partial enlarged view of

[0020] Figure 5This is a schematic diagram of the structure of the combined valve plate of the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the valve plate body of the utility model;

[0022] Figure 7 This is a schematic diagram of the passive sealing component structure of the utility model;

[0023] In the figure: 1. valve body; 2. cover plate; 3. bracket; 4. valve stem; 5. hand wheel; 6. combined valve plate; 7. packing seal; 8. sealing pressure piece; 9. valve plate body; 10. connecting seat; 11. O-ring one; 12. sealing clamp ring; 13. passive sealing assembly; 14. threaded groove; 15. screw; 16. support plate; 17. rubber sealing body; 18. force plate; 19. first annular protrusion; 20. second annular protrusion; 21. annular inner groove; 22. annular sealing clamping groove one; 23. overlapping cone; 24. sealing gasket; 25. annular sealing clamping groove two; 26. O-ring two. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] Depend on Figures 1 to 5 The utility model provides an energy-saving combined stop valve, comprising a valve body 1, a cover plate 2 is arranged at the top of the valve body 1, a bracket 3 is fixedly arranged at the top of the cover plate 2, a valve stem 4 is inserted inside the bracket 3, a hand wheel 5 is fixedly arranged at the top of the valve stem 4, the valve stem 4 is inserted in the cover plate 2 and the valve body 1, a combined valve plate 6 is arranged at the bottom of the valve stem 4, a packing seal 7 and a sealing pressing piece 8 are arranged between the valve stem 4 and the cover plate 2, the combined valve plate 6 is composed of a valve plate body 9, a connecting seat 10, an O-type sealing ring 11, a sealing snap ring 12 and a passive sealing assembly 13, the connecting seat 10 is fixedly connected to the middle position of the top of the valve plate body 9 and connected to the valve stem 4, the O-type sealing ring 11 is connected to the side of the top of the valve plate body 9, the sealing snap ring 12 is fixedly connected to the side of the bottom end of the valve plate body 9, and the passive sealing assembly 13 is connected to the middle position of the bottom end of the valve plate body 9;

[0026] When in use, the hand wheel 5 drives the valve stem 4 to rotate, and the valve stem 4 is threadedly connected to the bracket 3. During the rotation, the valve stem 4 can be raised and lowered, thereby driving the combined valve plate 6 to be raised and lowered, thereby controlling the opening and closing of the stop valve. Manual adjustment does not consume electricity, which has an energy-saving effect.

[0027] Depend on Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 It is given that the sealing clamp ring 12 and the valve plate body 9 are an integrated structure, and a thread groove 14 matching the passive sealing component 13 is opened in the middle position of the bottom end of the valve plate body 9. The passive sealing component 13 is composed of a screw 15, a support plate 16, a rubber sealing body 17 and a force plate 18. The support plate 16 is fixedly connected to the bottom end of the screw 15, the screw 15 is connected to the thread groove 14, the rubber sealing body 17 is sleeved on the outer surface of the support plate 16, the force plate 18 is fixedly connected to the middle position of the bottom end of the rubber sealing body 17, and the arc-shaped outer surface of the rubber sealing body 17 is provided with a first annular The protrusion 19 and the second annular protrusion 20, the side of the rubber sealing body 17 is provided with a plurality of annular inner grooves 21, the top of the valve body 1 is provided with an annular sealing clamping groove 22 matching the valve plate body 9 and the O-ring 11, the bottom of the valve body 1 is provided with a lapped truncated cone 23 matching the valve plate body 9, the top of the lapped truncated cone 23 is fixed with a sealing gasket 24, the top of the lapped truncated cone 23 is provided with an annular sealing clamping groove 25 matching the sealing clamp ring 12, and the bottom of the annular sealing clamping groove 25 is provided with an O-ring 26;

[0028] When the stop valve is closed, the valve plate body 9 fits with the overlapping truncated cone 23, and the sealing effect is achieved through the sealing gasket 24. At this time, the sealing snap ring 12 is inserted into the inside of the annular sealing clamping groove 25, and the secondary sealing effect is achieved through the O-ring 26. In addition, the pressure of the fluid is applied to the force-bearing plate 18, and the force-bearing plate 18 squeezes the rubber sealing body 17, so that the rubber sealing body 17 undergoes compression deformation. Since the first annular protrusion 19 and the second annular protrusion 20 fit with the inner wall of the valve body 1, the tightness of the fit can be improved under pressure, so that passive sealing can be achieved with the help of the pressure of the fluid, effectively ensuring the sealing effect of the stop valve in the closed state and avoiding fluid leakage; when the stop valve is in the open state, the combined valve plate 6 rises to the topmost position, and the O-ring 11 fits with the annular sealing clamping groove 22, thereby achieving a sealing effect and avoiding the fluid from directly impacting the cover plate 2 and the packing seal 7, thereby improving the sealing of the connection between the cover plate 2 and the valve body 1 and the sealing of the connection between the valve stem 4 and the cover plate 2.

[0029] During operation, by providing a sealing clamp ring, a lap cone, a sealing gasket, an annular sealing clamping groove 2, an O-ring 2 and a passive sealing assembly consisting of a screw, a support plate, a rubber sealing body and a force-bearing plate, the overall sealing effect can be improved when the stop valve is closed to avoid fluid leakage; by providing an O-ring 1 and an annular sealing clamping groove 1, auxiliary sealing can be achieved when the stop valve is opened to avoid fluid impact on the cover plate and the packing seal, thereby improving the sealing of the connection between the cover plate and the valve body and the sealing of the connection between the valve stem and the cover plate, avoiding fluid leakage and increasing the service life.

Claims

1. An energy-saving combined stop valve, comprising a valve body (1), characterized in that: The top end of the valve body (1) is provided with a cover plate (2), the top end of the cover plate (2) is fixedly provided with a bracket (3), the interior of the bracket (3) is interspersed with a valve stem (4), the top end of the valve stem (4) is fixedly provided with a hand wheel (5), the valve stem (4) is interspersed with the cover plate (2) and the valve body (1), the bottom end of the valve stem (4) is provided with a combined valve plate (6), a packing seal (7) and a sealing pressure piece (8) are provided between the valve stem (4) and the cover plate (2), and the combined valve plate (6) is composed of the valve plate itself The valve body (9) is composed of a connecting seat (10), an O-ring (11), a sealing snap ring (12) and a passive sealing component (13); the connecting seat (10) is fixedly connected to the middle position of the top end of the valve plate body (9) and is connected to the valve stem (4); the O-ring (11) is connected to the side of the top end of the valve plate body (9); the sealing snap ring (12) is fixedly connected to the side of the bottom end of the valve plate body (9); and the passive sealing component (13) is connected to the middle position of the bottom end of the valve plate body (9).

2. An energy-saving combined stop valve according to claim 1, characterized in that: The sealing clamp ring (12) and the valve plate body (9) are of an integrated structure, and a thread groove (14) matching the passive sealing component (13) is provided at the middle position of the bottom end of the valve plate body (9).

3. An energy-saving combined stop valve according to claim 2, characterized in that: The passive sealing assembly (13) is composed of a screw (15), a support plate (16), a rubber sealing body (17) and a force-bearing plate (18); the support plate (16) is fixedly connected to the bottom end of the screw (15); the screw (15) is connected to the thread groove (14); the rubber sealing body (17) is sleeved on the outer surface of the support plate (16); and the force-bearing plate (18) is fixedly connected to the middle position of the bottom end of the rubber sealing body (17).

4. The energy-saving combined stop valve according to claim 3 is characterized in that: The arc-shaped outer surface of the rubber sealing body (17) is provided with a first annular protrusion (19) and a second annular protrusion (20), and the inner side of the rubber sealing body (17) is provided with a plurality of annular inner grooves (21).

5. The energy-saving combined stop valve according to claim 1, characterized in that: The top end of the valve body (1) is provided with an annular sealing clamping groove (22) matching the valve plate body (9) and the O-ring (11).

6. The energy-saving combined stop valve according to claim 1, characterized in that: The bottom end of the valve body (1) is provided with a lapped cone (23) matching the valve plate body (9), the top of the lapped cone (23) is fixedly provided with a sealing gasket (24), the top of the lapped cone (23) is provided with an annular sealing clamping groove (25) matching the sealing clamping ring (12), and the bottom end of the annular sealing clamping groove (25) is provided with an O-ring (26).

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