Metal sealing type ball valve

Abstract

The utility model provides a metal sealing type ball valve which comprises a valve body and a valve cover, the valve body is provided with a boss or a concave platform, and the valve cover is provided with a corresponding concave platform or boss. When the valve body is connected with the valve cover, the concave table or the convex table is attached to each other, and metal sealing at the joint of the valve body and the valve cover can be achieved. The metal wire is arranged at the joint of the valve body and the valve cover for sealing, so that new hard sealing is added, a completely oxygen-free space can be ensured, glue is promoted to be completely cured, and the sealing performance of the valve is effectively enhanced.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a metal-sealed ball valve. Background Technology

[0002] A ball valve is a common type of valve that controls the flow of fluid through a rotating ball. Specifically, the opening and closing element (ball) is driven by the valve stem and rotates around the axis of the ball valve. Ball valves are mainly used in pipelines for shut-off, distribution, and changing the flow direction of the medium, and can also be used for fluid regulation and control.

[0003] Patent CN 219139885 U discloses a ball valve stem and a ball valve, a valve body assembly, a valve core, a rotating component, and an operating component. The valve core is movably disposed inside the valve body assembly, the rotating component is movably mounted on the valve body assembly, and one end of the rotating component is tractably connected to the valve core. The operating component is operably connected to the other end of the rotating component.

[0004] However, the device still has the following problems: when the valve body and valve cover are connected, a conventional threaded connection is used. However, the connection end faces of the valve body and valve cover cannot be completely flush during processing. If there are gaps on the end faces after the threads are tightened and they do not fit together, it will affect the sealing effect of the connection. Utility Model Content

[0005] To address the problems existing in the prior art, a metal-sealed ball valve is provided. This device adds a new hard seal by incorporating a metal wire seal at the connection between the valve body and the valve cover. This ensures a completely oxygen-free environment, promotes complete adhesive curing, and effectively enhances the valve's sealing performance.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] This utility model proposes a metal-sealed ball valve, including a valve body and a valve cover. The valve body is provided with a boss or a recess, and the valve cover is provided with a corresponding recess or a boss. When the valve body and the valve cover are connected, the recess or the boss fits into each other, which can achieve a metal seal at the connection between the valve body and the valve cover.

[0008] Preferably, the valve body and the valve cover are connected by threads to achieve a detachable connection.

[0009] Preferably, anaerobic adhesive is provided at the threaded connection between the valve body and the valve cover.

[0010] Preferably, a ball is rotatably connected to the valve body, and a valve seat that slides in contact with the ball is provided inside the valve body and the valve cover.

[0011] Preferably, a valve stem is rotatably connected to the valve body, the valve stem can drive the ball to rotate, and a handle is detachably connected to the upper end of the valve stem after it passes through the valve body.

[0012] Preferably, a sealing ring is provided at the connection between the valve stem and the valve body.

[0013] Preferably, a packing is provided at the connection between the valve stem and the valve body, and a gland for fixing the packing is threadedly connected to the valve body.

[0014] Preferably, the packing material is PTFE sealing packing.

[0015] Preferably, the valve stem passes through the handle, and the valve stem is threaded with a nut, which abuts against the valve stem to connect the valve stem and the handle.

[0016] Preferably, the sphere has a flow channel for water to pass through.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention achieves the connection between the valve body and the valve cover by using threaded anaerobic adhesive. The adhesive acts as a fixing and sealing agent. By setting a metal wire seal at the connection between the valve body and the valve cover, and using a combination of bosses and recesses, a new hard seal is added, which can ensure a completely oxygen-free space, promote the complete curing of the adhesive, and effectively enhance the sealing performance of the valve. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is the overall front view of this utility model;

[0021] Figure 2 yes Figure 1 Schematic diagram of the middle valve cover section;

[0022] Figure 3 yes Figure 1 Schematic diagram of the middle valve body.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1 Valve body; 2 Valve cover; 3 Ball; 4 Valve seat; 5 Valve stem; 6 Sealing ring; 7 Packing; 8 Gland; 9 Handle; 10 Nut; 11 Recess; 12 Boss; 13 Flow passage; 14 Anaerobic adhesive. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] like Figures 1-3 As shown, this embodiment proposes a metal-sealed ball valve, including a valve body 1 and a valve cover 2. The valve body 1 is provided with a boss 12 or a recess 11, and the valve cover 2 is provided with a corresponding recess 11 or a boss 12. When the valve body 1 and the valve cover 2 are connected, the recess 11 or the boss 12 fit together, which can achieve a metal seal at the connection between the valve body 1 and the valve cover 2.

[0027] In this embodiment, a recess 11 is provided on the end face of the valve body 1 near the valve cover 2, and a boss 12 that cooperates with the recess 11 is provided on the end face of the valve cover 2 near the valve body 1. The boss 12 and the valve cover 2 can be integrally processed and formed. The recess 11 and the boss 12 are both arranged in a ring at the end faces of the valve body 1 and the valve cover 2, so as to facilitate the cooperation of the recess 11 and the boss 12 to form a metal wire seal.

[0028] The valve body 1 and the valve cover 2 are connected by threads for detachability. Anaerobic adhesive 14 is provided at the threaded connection between the valve body 1 and the valve cover 2. Anaerobic adhesive 14 is a special single-component adhesive. Its main characteristic is that it does not cure when in contact with oxygen or air, but once air is isolated, it can rapidly polymerize and cure at room temperature under the catalytic action of the metal surface to form a strong bond and seal.

[0029] The mating surfaces of valve body 1 and valve cover 2 cannot be completely flat and tightly contacted; there will always be some tiny gaps. Anaerobic adhesive 14 has good fluidity and can penetrate well into these tiny gaps, squeezing out the air and solidifying to form a polymer, thereby filling the gaps and preventing fluid from leaking from these gaps, thus playing a sealing role.

[0030] Compared to traditional solid gaskets, the anaerobic adhesive 14 forms a more uniform and robust sealing layer after curing. It is unaffected by factors such as temperature and pressure, and therefore does not age or deform. As a result, the sealing effect is more durable and reliable, and it can effectively prevent leakage caused by gasket aging or corrosion.

[0031] When anaerobic adhesive 14 is applied to the threaded connection or mating surface of valve body 1 and valve cover 2 for assembly, the cured anaerobic adhesive 14 will form a tough plastic film between the thread gaps or mating surfaces. This film can firmly bond the valve body and valve cover together, preventing the threads from loosening or the valve cover from shifting due to vibration or impact.

[0032] Even after curing, the adhesive film formed by the anaerobic adhesive 14 retains a degree of removability. When it is necessary to disassemble the valve body 1 and valve cover 2, the adhesive film can be softened or dissolved by heating or using organic solvents, thus facilitating disassembly without damaging the threads or mating surfaces of the valve body 1 and valve cover 2.

[0033] Using anaerobic adhesive 14 eliminates the need for traditional anti-loosening components such as gaskets and spring washers, simplifying the assembly process, reducing assembly costs, and minimizing sealing problems caused by improper assembly. Anaerobic adhesive has excellent heat resistance, pressure resistance, low-temperature resistance, and chemical resistance, making it adaptable to different working environments and media. Furthermore, the combination of the boss 12 and the recess 11 adds a new hard seal, ensuring a completely oxygen-free space, promoting the complete curing of the anaerobic adhesive 14, and effectively enhancing the valve's sealing performance.

[0034] A ball 3 is rotatably connected inside the valve body 1. A valve seat 4 is provided inside the valve body 1 and the valve cover 2, which slides in contact with the ball 3. The valve body 4 is fixed inside the valve body 1 and the valve cover 2, and the valve seat 4 can be fitted with a sealing ring 6 to further improve the sealing effect at the connection position of the ball 3. A flow channel 13 for water to pass through is opened inside the ball 3. By driving the rotation of the ball 3, the orientation of the flow channel 13 is changed, thereby controlling the start and stop of the ball valve.

[0035] A valve stem 5 is rotatably connected inside the valve body 1. The valve stem 5 can drive the ball 3 to rotate. The upper end of the valve stem 5 passes through the valve body 1 and is detachably connected to a handle 9. The upper end of the ball 3 is provided with a square groove. The lower end of the valve stem 5 has a square cross-section that matches the square groove. The lower end of the valve stem 5 is inserted into the square groove, so that when the valve stem 5 rotates, it can drive the ball 3 to rotate at the same time.

[0036] A sealing ring 6 is provided at the connection between the valve stem 5 and the valve body 1. The sealing ring 6 is fitted on the valve stem 5 and improves the sealing effect at the connection between the valve stem 5 and the valve body 1. The sealing ring 6 is specifically an O-ring and is made of rubber or EPDM material.

[0037] A packing 7 is provided at the connection between the valve stem 5 and the valve body 1. The valve body 1 is threadedly connected to a gland 8 for fixing the packing 7. The packing 7 is located above the sealing ring 6. The packing 7 is PTFE sealing packing. The packing 7 and the valve stem 5 are in sliding contact. The packing 7 serves to further seal the connection between the valve stem 5 and the valve body 1.

[0038] A handle 9 passes through the valve stem 5. A nut 10 is threaded onto the valve stem 5. The nut 10 abuts against the valve stem 5 to connect the valve stem 5 and the handle 9. The upper end of the valve stem 5 can be a square rod or a round rod. The handle 9 has a through hole. The through hole of the handle 9 passes through the valve stem 5, so that when the handle 9 is rotated, it can drive the valve stem 5 to rotate at the same time.

[0039] After the upper end of the valve stem 5 passes through the valve body 1, a support platform can be fixedly connected. When installing the handle 9, the handle 9 is sleeved on the upper part of the valve stem 5 and then contacts the support platform of the valve stem 5. The support platform 5 supports the handle 9. Then, the nut 10 is screwed into the upper part of the valve stem 5. The lower end of the nut 10 is pressed against the handle 9. The nut 10 and the support platform work together to fix the handle 9.

[0040] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A metal-sealed ball valve, comprising a valve body (1) and a valve cover (2), characterized in that, The valve body (1) is provided with a boss (12) or a recess (11), and the valve cover (2) is provided with a corresponding recess (11) or a boss (12); when the valve body (1) and the valve cover (2) are connected, the recess (11) or the boss (12) fit together, which can achieve metal sealing at the connection between the valve body (1) and the valve cover (2).

2. The metal-sealed ball valve according to claim 1, characterized in that, The valve body (1) and the valve cover (2) are connected by threads to achieve a detachable connection.

3. A metal-sealed ball valve according to claim 2, characterized in that, Anaerobic adhesive (14) is provided at the threaded connection between the valve body (1) and the valve cover (2).

4. A metal-sealed ball valve according to claim 1, characterized in that, A ball (3) is rotatably connected inside the valve body (1), and a valve seat (4) is provided inside the valve body (1) and the valve cover (2) to slide in contact with the ball (3).

5. A metal-sealed ball valve according to claim 4, characterized in that, A valve stem (5) is rotatably connected inside the valve body (1). The valve stem (5) can drive the ball (3) to rotate. The upper end of the valve stem (5) extends out of the valve body (1) and is detachably connected to a handle (9).

6. A metal-sealed ball valve according to claim 5, characterized in that, A sealing ring (6) is provided at the connection between the valve stem (5) and the valve body (1).

7. A metal-sealed ball valve according to claim 5, characterized in that, A packing (7) is provided at the connection between the valve stem (5) and the valve body (1), and a gland (8) for fixing the packing (7) is threaded onto the valve body (1).

8. A metal-sealed ball valve according to claim 7, characterized in that, The packing material (7) is a PTFE sealing packing material.

9. A metal-sealed ball valve according to claim 5, characterized in that, The valve stem (5) passes through the handle (9), and the valve stem (5) is threaded with a nut (10). The nut (10) abuts against the valve stem (5) to realize the connection between the valve stem (5) and the handle (9).

10. A metal-sealed ball valve according to claim 4, characterized in that, The sphere (3) has a flow channel (13) for water to pass through.

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