Long-service-life lead-free valve

Abstract

The utility model relates to the technical field of valves, and discloses a long-service-life lead-free valve which comprises a valve body and a limiting assembly, a leakproof assembly comprises a fastening nut, a sealing ring is arranged below the fastening nut, a valve rod is installed in a connector in a sealed mode through threads arranged on the inner wall of the fastening nut, and the valve rod is connected with the limiting assembly. A connecting sleeve ring is fixedly connected to the upper portion of the fastening nut, an annular gear is arranged on the upper portion of the connecting sleeve ring, a waterproof ring is installed at the connecting position of the fastening nut and the connector in a sleeving mode, and a sealing ring is arranged at the connecting position of the waterproof ring and the connector and installed in a sealed mode. Therefore, the effects that fluid is prevented from leaking from the upper connector when the lead-free valve is used for a long time, double-layer protection is arranged, the annular toothed plate is pushed through the water pressure of leaked water flow to drive the annular gear to rotate, and the fastening nut is installed in a sealing mode again are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a long-life lead-free valve. Background Art

[0002] Valves are pipe accessories used to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure, and flow) of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. Valves are control components in fluid conveying systems, with functions such as shut-off, regulation, diversion, prevention of backflow, pressure stabilization, diversion, or overflow pressure relief. Valves used in fluid control systems, from the simplest shut-off valves to various valves used in extremely complex automatic control systems, have a wide variety of varieties and specifications. Lead-free valves refer to valves that do not contain toxic substances such as lead. This type of valve is usually made of copper alloy or other non-toxic materials to replace traditional lead-containing copper valves. Lead-free valves are widely used in food, medicine, chemical and other industries because they can reduce harm to the environment and human body and meet modern environmental protection and health requirements.

[0003] For example, the Chinese patent "CN212338242U" discloses an easily adjustable high-life and high-reliability valve, which proposes that: the accommodating chamber is provided with a first sealing structure and a second sealing structure corresponding to the sphere at the left and right sides of the sphere, the first sealing structure is a soft sealing structure, and the second sealing structure is a hard sealing structure, and the sphere is sealed by the first sealing structure and the second sealing structure. In the easily adjustable high-life and high-reliability valve, two sealing structures, a disc spring hard sealing structure and a sealing ring soft sealing structure, are provided at the left and right ends of the sphere, respectively. The disc spring not only seals, but also scrapes away impurities attached to the surface of the sphere, thereby ensuring the cleanliness of the sphere surface, ensuring the sealing effect of the sealing ring, and improving the service life of the ball core.

[0004] It can be seen from the above-mentioned device that although the above-mentioned device provides a method for achieving a better sealing effect of the ball core, the applicant believes that the following defects still exist:

[0005] Existing lead-free valves only consider the non-toxicity and harmlessness of the material and the sealing performance when they are produced during use. After long-term use, the valve core will be affected by the water pressure, resulting in reduced sealing performance, causing water leakage. In addition, water leakage cannot be discovered and repaired in time, resulting in a continuous waste of water resources. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] Aiming at the deficiencies of the prior art, the utility model provides a lead-free valve with a long service life, which has the advantages of preventing the valve core from shifting due to long-term use by several support springs for moving and limiting the valve core, and having a second layer of protection when water leakage fails to be detected in time. It can automatically fasten the bolts by water pressure to prevent the water flow from leaking continuously, solving the problems that the existing lead-free valves only consider the non-toxic and harmless nature of the material and the sealing performance at the time of production completion. After long-term use, the valve core will be affected by water pressure, resulting in reduced sealing performance, causing water leakage, and the continuous waste of water resources due to the failure to detect and repair the water leakage in time.

[0008] (2) Technical solution

[0009] To achieve the above object, the utility model provides the following technical solution: A lead-free valve with a long service life, including a valve body and a limiting component. An inlet is provided on one side of the valve body, an outlet is provided on the other side of the valve body, a connection head is provided above the valve body, a valve rod is movably installed inside the connection head, and a leak-proof component is provided between the valve rod and the outside of the connection head;

[0010] The leak-proof component includes a fastening nut, a sealing ring is provided below the fastening nut, the fastening nut seals and installs the valve rod inside the connection head through the threads provided on the inner wall, a connection collar is fixedly connected above the fastening nut, an annular gear is provided above the connection collar, a waterproof ring is sleeved and installed at the connection between the fastening nut and the connection head, a sealing ring is provided at the connection between the waterproof ring and the connection head and is sealed and installed, a communication pipe is provided on the outer wall of the waterproof ring, and the communication pipe is fixedly connected to the inside of the inlet.

[0011] Preferably, a connection pipe is provided above the waterproof ring, the connection pipe is fixedly connected to the tooth plate base, the inside of the tooth plate base is hollow and an annular tooth plate is movably installed inside it, and a sealing member is provided between the tooth plate base and the annular tooth plate and the two are sealed and installed.

[0012] Preferably, a limiting base is provided on the outer wall of the tooth plate base, and the limiting base is fixedly connected to the outer wall of the waterproof ring.

[0013] Preferably, the annular tooth plate is meshed and installed with the annular gear through the teeth on the surface.

[0014] Preferably, a wrench is provided on the outer wall of the valve rod, a limiting nut is provided above the wrench, and the limiting nut is meshed and installed on the outer wall of the valve rod through threads.

[0015] Preferably, a ball core base is provided on the inner wall of the valve body, the upper part of the ball core base is set as an arc-shaped concave surface, a ball core is fitted above the ball core base, and the ball core is fixedly connected above to the valve rod.

[0016] Preferably, the limiting component includes a fixing ring, and the two fixing rings are arranged on both sides of the ball core inside the valve body.

[0017] Preferably, an annular groove is formed on the outer wall of the fixing ring, and a plurality of support springs are arranged in an annular matrix in the annular groove of the fixing ring. A sealing gasket is fixedly connected to the outer walls of the plurality of support springs, and the sealing gasket is sealingly attached to the outer wall of the ball core.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the present utility model provides a high-life lead-free valve, which has the following beneficial effects:

[0020] 1. For this high-life lead-free valve, by setting the limiting component, the elasticity of a plurality of support springs is used to support the sealing gasket, ensuring the fitting degree between the sealing gasket and the ball core. At the same time, the movement of the ball core is limited, ensuring that fluid leakage will not occur due to the aging of the sealing gasket during long-term use, and increasing the overall life of the ball valve.

[0021] 2. For this high-life lead-free valve, by setting the anti-leakage component, it is ensured that fluid will not leak from the upper connector during long-term use of the lead-free valve. Double-layer protection is provided, and the water pressure of the leaked water is used to push the annular tooth plate to drive the annular gear to rotate, so as to re-seal and install the fastening nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0023] Figure 2 is a schematic diagram of the internal structure of the valve body of the present utility model;

[0024] Figure 3 is an exploded structural diagram of the limiting component of the present utility model;

[0025] Figure 4 is an exploded structural diagram of the anti-leakage component of the present utility model.

[0026] The reference numerals in the drawings are:

[0027] 1. Valve body; 11. Water inlet; 12. Water outlet; 13. Ball core base; 14. Ball core; 15. Valve stem; 16. Wrench; 17. Limiting nut; 18. Connector; 2. Limiting component; 21. Fixing ring; 22. Support spring; 23. Sealing gasket; 3. Anti-leakage component; 31. Fastening nut; 32. Connecting collar; 33. Annular gear; 34. Waterproof ring; 35. Connecting pipe; 36. Tooth plate base; 37. Limiting base; 38. Annular tooth plate; 39. Connecting pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] 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. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] Please refer to Figure 1-2 , a high-life lead-free valve, which includes a valve body 1 and a limit assembly 2. The whole valve is made of copper alloy material. An inlet 11 is provided on one side of the valve body 1, and an outlet 12 is provided on the other side of the valve body 1. A connection head 18 is provided above the valve body 1. A valve stem 15 is movably installed inside the connection head 18. A leak-proof assembly 3 is provided between the valve stem 15 and the outside of the connection head 18. A wrench 16 is provided on the outer wall of the valve stem 15, and a limit nut 17 is provided above the wrench 16. The limit nut 17 is installed on the outer wall of the valve stem 15 by thread engagement. A ball core base 13 is provided on the inner wall of the valve body 1. The upper part of the ball core base 13 is an arc-shaped concave surface. A ball core 14 is attached to the upper part of the ball core base 13. The upper part of the ball core 14 is fixedly connected to the valve stem 15.

[0030] Please refer to Figure 2-3 , the limit assembly 2 includes a fixing ring 21. The fixing ring 21 is made of a corrosion-resistant and high-strength copper alloy material. Two fixing rings 21 are arranged on both sides of the ball core 14 inside the valve body 1. An annular groove is provided on the outer wall of the fixing ring 21. A number of support springs 22 are arranged in an annular matrix in the annular groove of the fixing ring 21. The support springs 22 are made of elastic materials to ensure good elasticity and durability. A sealing gasket 23 is fixedly connected to the outer walls of the number of support springs 22. The sealing gasket 23 is hermetically attached to the outer wall of the ball core 14. The sealing gasket 23 is made of a corrosion-resistant and high-pressure-resistant material, such as rubber or polytetrafluoroethylene. The shape and size of the sealing gasket 23 are designed according to the outer wall of the ball core 14 to ensure tight fitting and good sealing effect. Through such a design, the sealing gasket 23 can be tightly sealed and attached to the outer wall of the ball core 14, effectively preventing fluid leakage. At the same time, the support springs 22 provide a certain elasticity and buffering for the sealing gasket 23, reducing the influence of pressure fluctuations or vibrations on the sealing performance.

[0031] Please refer to Figure 2 , Figure 4, the anti-leakage component 3 includes a fastening nut 31. A sealing ring is arranged below the fastening nut 31. The fastening nut 31 seals and installs the valve stem 15 inside the connector 18 through the threads provided on its inner wall. This sealing installation method can ensure the tight connection between the valve stem 15 and the connector 18 and prevent fluid leakage. A connecting collar 32 is fixedly connected above the fastening nut 31. An annular gear 33 is arranged above the connecting collar 32. A waterproof ring 34 is sleeved and installed at the connection between the fastening nut 31 and the connector 18. A sealing ring is arranged at the connection between the waterproof ring 34 and the connector 18 and is sealed and installed. Its design purpose is to prevent fluid from leaking from the connector 18. It is usually made of corrosion-resistant and high-pressure-resistant materials such as rubber or polytetrafluoroethylene to ensure good sealing performance and a long service life. The outer wall of the waterproof ring 34 fits tightly with the inner wall of the connector 18 to form a barrier to block fluid. During the normal use of the valve, the waterproof ring 34 can withstand the changes in fluid pressure and temperature, maintain the sealing performance, and prevent fluid from leaking from the connector 18. A communicating pipe 39 is opened on the outer wall of the waterproof ring 34. The communicating pipe 39 is fixedly connected inside the water inlet 11. A connecting pipe 35 is opened above the waterproof ring 34. The connecting pipe 35 is fixedly connected to the tooth plate base 36. The inside of the tooth plate base 36 is hollow and an annular tooth plate 38 is movably installed. A sealing member is arranged between the tooth plate base 36 and the annular tooth plate 38 and the two are sealed and installed. A limiting base 37 is arranged on the outer wall of the tooth plate base 36. The limiting base 37 is fixedly connected to the outer wall of the waterproof ring 34. The annular tooth plate 38 is meshed and installed with the annular gear 33 through the teeth on its surface.

[0032] Working principle: First, after the valve is installed, the wrench 16 is used to control the opening and closing of the ball core 14. When the ball core 14 is opened and closed, the elastic support of the support springs 22 inside the two fixing rings 21 enables the sealing gasket 23 to limit the movement of the ball core 14, preventing the position of the ball core 14 from shifting during long-term use and causing fluid leakage. At the same time, the sealing gasket 23 maintains the sealing performance of the ball core 14. At the same time, the ball core 14 provides a supporting force for the sphere through the ball core base 13 below, and the arc-shaped concave surface of the ball core base 13 fits with the ball core 14, reducing the friction when the ball core 14 rotates and making the limiting effect better.

[0033] Secondly, after the valve stem 15 is limited and fixed by the limit nut 17, the waterproof ring 34 is sleeved between the limit nut 17 and the connector 18 to prevent fluid from flowing out at the connection of the upper connector 18 when the limit nut 17 becomes loose. After the installation of the waterproof ring 34 is completed, the upper annular tooth plate 38 meshes with the annular gear 33 through the surface teeth. When the annular tooth plate 38 fits against the left end inside the limit base 37, it cannot rotate counterclockwise any further, which can prevent the annular gear 33 from moving and driving the lower fastening nut 31 to become loose. Secondly, when there is a leak, the water first flows into the waterproof ring 34. After the waterproof ring 34 is full, it flows into the limit base 37 through the connecting pipe 35 and continuously pushes the annular tooth plate 38 to move. When pushing the annular tooth plate 38 to move, the annular gear 33 is driven to rotate by the annular tooth plate 38, so that the fastening nut 31 fits against the connector 18 again for sealed connection, and the fluid flows back into the water inlet 11 through the connecting pipe 39.

[0034] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A long-life lead-free valve, comprising a valve body (1) and a limiter assembly (2), 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), a connecting head (18) is provided above the valve body (1), a valve stem (15) is movably installed inside the connecting head (18), and a leakage prevention component (3) is provided outside the valve stem (15) and the connecting head (18); The anti-leakage component (3) comprises a fastening nut (31), a sealing ring is arranged below the fastening nut (31), the fastening nut (31) is provided with a thread on the inner wall to seal the valve stem (15) inside the connecting head (18), a connecting ring (32) is fixedly connected above the fastening nut (31), a ring gear (33) is arranged above the connecting ring (32), a waterproof ring (34) is sleeved and installed at the connection between the fastening nut (31) and the connecting head (18), a sealing ring is arranged at the connection between the waterproof ring (34) and the connecting head (18) and is sealed, and a connecting pipe (39) is opened on the outer wall of the waterproof ring (34), and the connecting pipe (39) is fixedly connected to the inside of the water inlet (11).

2. The long-life lead-free valve according to claim 1, characterized in that: A connecting pipe (35) is provided above the waterproof ring (34), and the connecting pipe (35) is fixedly connected to the tooth plate base (36). The tooth plate base (36) is hollow inside and has an annular tooth plate (38) movably installed thereon. A sealing member is provided between the tooth plate base (36) and the annular tooth plate (38), and the two are sealed and installed.

3. The long-life lead-free valve according to claim 2, characterized in that: A limiting base (37) is provided on the outer wall of the tooth plate base (36), and the limiting base (37) is fixedly connected to the outer wall of the waterproof ring (34).

4. The long-life lead-free valve according to claim 3, characterized in that: The annular gear plate (38) is meshed and installed with the annular gear (33) via surface teeth.

5. The long-life lead-free valve according to claim 4, characterized in that: The outer wall of the valve stem (15) is provided with a wrench (16), and a limit nut (17) is provided above the wrench (16). The limit nut (17) is installed on the outer wall of the valve stem (15) through threaded engagement.

6. The long-life lead-free valve according to claim 1, characterized in that: The inner wall of the valve body (1) is provided with a ball core base (13), the upper part of the ball core base (13) is provided with an arc-shaped concave surface, the upper part of the ball core base (13) is provided with a ball core (14), and the upper part of the ball core (14) is fixedly connected to the valve stem (15).

7. The long-life lead-free valve according to claim 6, characterized in that: The limit assembly (2) comprises a fixing ring (21), wherein two fixing rings (21) are arranged on both sides of the ball core (14) inside the valve body (1).

8. The long-life lead-free valve according to claim 7, characterized in that: The outer wall of the fixing ring (21) is provided with an annular groove, a plurality of support springs (22) are arranged in an annular matrix in the annular groove of the fixing ring (21), and a plurality of sealing pads (23) are fixedly connected to the outer walls of the support springs (22), and the sealing pads (23) are sealingly fitted to the outer wall of the ball core (14).

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