One-way metal sealing ball valve

Abstract

The utility model discloses a one-way metal sealing ball valve which comprises a first metal shell, a valve rod, a second metal shell and a ball body, the second metal shell is arranged on one side of the first metal shell, a circulation channel is formed between the first metal shell and the second metal shell, the ball body is arranged in the first metal shell, and the valve rod is arranged in the ball body. And a contact surface is arranged outside one side of the ball body, a reserved groove is formed in the side, close to the ball body, of the interior of the first metal shell, a first sealing ring and a second sealing ring are arranged in the reserved groove, and a valve rod is arranged at the top of the ball body. According to the ball valve, the first metal shell, the second metal shell, the ball body, the valve rod, the contact surface, the reserved groove, the first sealing ring, the second sealing ring, the third sealing ring and the reset spring are installed, the sealing performance of the ball valve body is guaranteed, the phenomenon of leakage caused by deformation of the ball body is not prone to occurring, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of one-way seal ball valves, and particularly to a one-way metal seal ball valve. Background Technique

[0002] A one-way seal ball valve is a device that only allows the medium to flow in one direction. Its structure is relatively simple, consisting of a sphere, a sealing surface, a metal valve body, etc. It is also relatively convenient to operate, and the opening and closing of the valve can be achieved only by rotating the sphere.

[0003] The one-way seal ball valve controls the opening and closing of the valve by rotating the sphere. In the closed state, the sphere fits tightly with the sealing surface inside the valve body to achieve one-way seal. In the open state, the sphere rotates a certain angle to allow the medium to pass through. Since the sphere is easily deformed when impacted by water flow for a long time during the use of the one-way ball valve, gaps are likely to appear between the sphere and the sealing surface, resulting in a decrease in the sealing performance of the ball valve and affecting the service life of the ball valve. Content of the Utility Model

[0004] The purpose of the utility model is to provide a one-way metal seal ball valve to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A one-way metal seal ball valve, including a first metal shell, a valve stem, a second metal shell and a sphere. A second metal shell is arranged on one side of the first metal shell, and a flow passage is formed between the first metal shell and the second metal shell. A sphere is arranged inside the first metal shell, and a contact surface is arranged outside one side of the sphere. A reserved groove is opened on one side of the first metal shell close to the sphere, and a first sealing ring and a second sealing ring are respectively arranged inside the reserved groove. A third sealing ring is arranged between the first sealing ring and the second sealing ring. One side of the first sealing ring is connected to the contact surface. A valve stem is arranged on the top of the sphere, and the top of the valve stem extends to the outside of the first metal shell.

[0006] Preferably, a driving chamber is arranged on the top of the first metal shell through a bracket, and a driving gear is arranged at one end inside the driving chamber through a roller.

[0007] Preferably, a rotary driving mechanism is fixed at one end of the top of the driving chamber, and the output end of the rotary driving mechanism is connected to the driving gear through a roller.

[0008] Preferably, the top of the valve stem extends into the driving chamber, and a driven gear meshing with the driving gear is arranged at the top of the valve stem.

[0009] Preferably, a hollow portion is provided inside the valve stem, and support ribs are evenly distributed inside the hollow portion.

[0010] Preferably, one side of the second metal housing close to the first metal housing is fixedly connected to the first metal housing by bolts evenly, and one end of each bolt is fixedly locked by a nut.

[0011] Preferably, both ends inside the reserved groove are respectively connected to the third sealing ring by return springs, and both ends of the third sealing ring are closely fitted with the inclined surfaces of the first sealing ring and the second sealing ring respectively.

[0012] Preferably, one end of each nut close to the second metal housing is closely fitted with the second metal housing through a spacer, and an elastic element is provided between each spacer and the nut.

[0013] Preferably, the elastic elements are all made of rubber strips with an arched structure, and both ends of each elastic element abut against the spacer.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: The one-way metal-sealed ball valve is provided with a first metal housing, a second metal housing, a sphere, a valve stem, a contact surface, a reserved groove, a first sealing ring, a second sealing ring, a third sealing ring and a return spring. Under normal conditions, the first sealing ring inside the first metal housing is connected to the contact surface on the sphere to achieve sealing. When the sphere is deformed by the water flow scouring, a gap often occurs between the contact surface and the first sealing ring, affecting the sealing performance. Since both ends of the third sealing ring are closely fitted with the inclined surfaces of the first sealing ring and the second sealing ring respectively, under the action of the return spring, a pressure is always applied to the first sealing ring in the direction of the contact surface, making the first sealing ring closely adhere to the contact surface on the outer wall of the sphere, ensuring the sealing performance of the ball valve body, making it not easy to leak due to the deformation of the sphere, and extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a front view sectional structure diagram of the present utility model;

[0017] Figure 2 It is a sectional structure diagram of the driving chamber of the present utility model;

[0018] Figure 3 It is of the present utility modelFigure 1 Schematic diagram of the enlarged structure at position A;

[0019] Figure 4 This is for the Figure 1 Schematic diagram of the enlarged structure at position B;

[0020] Figure 5 This is the schematic diagram of the top - view sectional structure of the valve stem of the present utility model.

[0021] In the figure: 1. First metal shell; 2. Valve stem; 3. Driving chamber; 4. Second metal shell; 5. Flow - through channel; 6. Sphere; 7. Driven gear; 8. Driving gear; 9. Rotary driving mechanism; 10. Contact surface; 11. First sealing ring; 12. Second sealing ring; 13. Third sealing ring; 14. Reserved groove; 15. Return spring; 16. Bolt; 17. Elastic element; 18. Nut; 19. Spacer; 20. Hollow part; 21. Support rib. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figure 1-5 , an embodiment provided by the present utility model: A one - way metal - sealed ball valve includes a first metal shell 1, a valve stem 2, a second metal shell 4, and a sphere 6. A second metal shell 4 is arranged on one side of the first metal shell 1, and a flow - through channel 5 is formed between the first metal shell 1 and the second metal shell 4;

[0024] The second metal shell 4 is fixedly connected to the first metal shell 1 evenly through bolts 16 on the side close to the first metal shell 1, and one end of each bolt 16 is fixedly locked through a nut 18, which is convenient for the disassembly and maintenance of the ball valve;

[0025] One end of each nut 18 close to the second metal shell 4 is in close contact with the second metal shell 4 through a spacer 19, and an elastic element 17 is arranged between the spacer 19 and the nut 18

[0026] The elastic elements 17 are all made of rubber strips with an arched structure, and both ends of the elastic element 17 are abutted against the spacer 19;

[0027] When subjected to an external force, the external force can be dispersed and buffered through the deformation and recovery of the elastic element 17 itself, so that the nut 18 is not easily loosened, and the connection stability between the first metal shell 1 and the second metal shell 4 is improved;

[0028] Inside the first metal housing 1, there is a sphere 6, and on the outside of one side of the sphere 6, there is a contact surface 10. A reserved groove 14 is provided on one side inside the first metal housing 1 close to the sphere 6, and a first sealing ring 11 and a second sealing ring 12 are respectively arranged inside the reserved groove 14;

[0029] A third sealing ring 13 is arranged between the first sealing ring 11 and the second sealing ring 12, and one side of the first sealing ring 11 is connected to the contact surface 10;

[0030] Both ends inside the reserved groove 14 are respectively connected to the third sealing ring 13 through a return spring 15, and both ends of the third sealing ring 13 are closely fitted with the inclined surfaces of the first sealing ring 11 and the second sealing ring 12;

[0031] Under normal conditions, the first sealing ring 11 inside the reserved groove 14 is connected to the contact surface 10 on the sphere 6 to achieve sealing. When the sphere 6 is deformed due to the scouring of water flow, gaps often occur between the contact surface 10 and the first sealing ring 11, affecting the sealing performance. However, since both ends of the third sealing ring 13 are closely fitted with the inclined surfaces of the first sealing ring 11 and the second sealing ring 12, under the action of the return spring 15, a pressure towards the contact surface 10 is always exerted on the first sealing ring 11, making the first sealing ring 11 closely adhere to the contact surface 10 on the outer wall of the sphere 6;

[0032] Ensure the sealing performance of the ball valve body, making it not easy to leak due to the deformation of the sphere 6 and extending the service life;

[0033] At the top of the sphere 6, there is a valve stem 2, and the top of the valve stem 2 extends to the outside of the first metal housing 1;

[0034] At the top of the first metal housing 1, there is a driving chamber 3 through a bracket, and at one end inside the driving chamber 3, there is a driving gear 8 through a roller;

[0035] At one end of the top of the driving chamber 3, a rotary driving mechanism 9 is fixed, and the output end of the rotary driving mechanism 9 is connected to the driving gear 8 through a roller.

[0036] The top of the valve stem 2 extends into the driving chamber 3, and at the top of the valve stem 2, there is a driven gear 7 meshing with the driving gear 8;

[0037] By rotating the rotary driving mechanism 9, the driving gear 8 can be driven to rotate. The driving gear 8 meshes with the driven gear 7, causing the driven gear 7 and the valve stem 2 to rotate, which is beneficial to automatically control the rotation of the valve stem 2, thereby driving the sphere 6 to rotate and realizing the opening and closing of the one-way ball valve without manual operation, saving time and effort;

[0038] The interior of the valve stem 2 is provided with a hollow part 20, and support ribs 21 are evenly distributed inside the hollow part 20, which is beneficial to increasing the structural strength of the valve stem 2 and making it not easily deformed or bent.

[0039] The specific model and specification of the rotary drive mechanism 9 need to be determined by selection calculation according to the specification parameters of the device. The selection calculation method is prior art, so it will not be elaborated in detail here.

[0040] Working principle: When the embodiment of the present application is in use, the first metal shell 1 and the second metal shell 4 are fixedly connected by bolts 16. The bolts 16 are fixedly locked by nuts 18. The spacer 19 is in close contact with the second metal shell 4. The elastic element 17 is made of a rubber strip with an arched structure. When subjected to an external force, it can disperse and buffer the external force through its own deformation and recovery, making the nut 18 not easily loosen and improving the connection stability between the first metal shell 1 and the second metal shell 4. Under normal conditions, the first sealing ring 11 in the reserved groove 14 is connected to the contact surface 10 on the sphere 6 to achieve sealing. When the sphere 6 is deformed by the water flow scouring, a gap often occurs between the contact surface 10 and the first sealing ring 11, affecting the sealing performance. However, since both ends of the third sealing ring 13 are closely fitted with the inclined surfaces of the first sealing ring 11 and the second sealing ring 12 respectively, under the action of the return spring 15, a pressure is always applied to the first sealing ring 11 in the direction of the contact surface 10, making the first sealing ring 11 closely adhere to the contact surface 10 on the outer wall of the sphere 6, ensuring the sealing performance of the ball valve body and making it not easily leak due to the deformation of the sphere 6, thus prolonging the service life. In addition, the rotary drive mechanism 9 can drive the driving gear 8 to rotate. The driving gear 8 meshes with the driven gear 7, making the driven gear 7 and the valve stem 2 rotate, which is beneficial to automatically controlling the rotation of the valve stem 2, thereby driving the sphere 6 to rotate and realizing the opening and closing of the one-way ball valve without manual operation, saving time and effort.

[0041] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0043] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here.

[0044] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and changes can be made to the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A one-way metal sealing ball valve, characterized in that: The invention comprises a first metal shell (1), a valve stem (2), a second metal shell (4) and a sphere (6); the second metal shell (4) is arranged on one side of the first metal shell (1), and a circulation channel (5) is formed between the first metal shell (1) and the second metal shell (4); the sphere (6) is arranged inside the first metal shell (1), and a contact surface (10) is arranged outside one side of the sphere (6); a reserved groove (14) is provided on one side of the first metal shell (1) close to the sphere (6), and a first sealing ring (11) and a second sealing ring (12) are arranged inside the reserved groove (14), respectively; a third sealing ring (13) is arranged between the first sealing ring (11) and the second sealing ring (12); one side of the first sealing ring (11) is connected to the contact surface (10); a valve stem (2) is arranged on the top of the sphere (6), and the top of the valve stem (2) extends to the outside of the first metal shell (1).

2. A one-way metal sealing ball valve according to claim 1, characterized in that: A driving chamber (3) is arranged on the top of the first metal shell (1) via a bracket, and a driving gear (8) is arranged at one end inside the driving chamber (3) via a roller.

3. A one-way metal sealing ball valve according to claim 2, characterized in that: A rotary drive mechanism (9) is fixed to one end of the top of the drive chamber (3), and an output end of the rotary drive mechanism (9) is connected to a driving gear (8) via a roller.

4. A one-way metal sealing ball valve according to claim 2, characterized in that: The top of the valve stem (2) extends to the interior of the drive chamber (3), and a driven gear (7) meshing with a driving gear (8) is provided on the top of the valve stem (2).

5. The one-way metal sealing ball valve according to claim 1, characterized in that: A hollow portion (20) is provided inside the valve stem (2), and support ribs (21) are evenly distributed inside the hollow portion (20).

6. A one-way metal sealing ball valve according to claim 1, characterized in that: The side of the second metal shell (4) close to the first metal shell (1) is evenly fixedly connected to the first metal shell (1) via bolts (16), and one end of the bolts (16) is fixedly locked via nuts (18).

7. The one-way metal sealing ball valve according to claim 1, characterized in that: The two ends of the reserved groove (14) are connected to the third sealing ring (13) via a return spring (15), and the two ends of the third sealing ring (13) are tightly matched with the inclined surfaces of the first sealing ring (11) and the second sealing ring (12).

8. The one-way metal sealing ball valve according to claim 6, characterized in that: One end of the nut (18) close to the second metal shell (4) is tightly fitted to the second metal shell (4) via a spacer (19), and an elastic element (17) is provided between the spacer (19) and the nut (18).

9. A one-way metal sealing ball valve according to claim 8, characterized in that: The elastic elements (17) are made of rubber strips with an arched structure, and both ends of the elastic elements (17) are against the spacer (19).

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