A valve for a valve stem welded steel cylinder containing a metal insert

Abstract

The utility model discloses a bottle valve for welding steel bottle with valve rod contains metal insert, including valve body and the valve rod subassembly of being located in the valve body, the bottom of valve body is equipped with the air inlet, and the lateral surface of valve body is equipped with the gas outlet, the valve rod subassembly includes the valve rod main part and is located the sealing element in the middle part of valve rod main part, is equipped with the air inlet channel in the valve body, the valve rod subassembly moves relative to the air inlet channel, to control the on-off of gas from air inlet to gas outlet, the sealing element is metal insert, the utility model can improve the sealing between valve rod and valve body obviously, reduces the gas seepage, guarantees that bottle valve has long -term stable air tightness.

Description

Technical Field

[0001] This utility model relates to the field of bottle valve technology, and in particular to a bottle valve for welded steel cylinders with a valve stem containing a metal insert. Background Technology

[0002] With the increasing demand for compressed and liquefied gases in industrial production, welding processing, and laboratories, steel cylinders are widely used as important containers for gas storage and transportation. Cylinder valves are special valves installed at the mouth of welded steel cylinders to open, close, and regulate the gas flow rate inside the cylinder.

[0003] Existing valves for welded steel cylinders mostly adopt a valve stem structure that is integrally machined from a single material. Although this type of structure is simple to manufacture, the sealing surface is prone to wear under long-term working conditions. The valve stem material is usually plastic or other non-metallic, with low hardness and smoothness. The valve stem and valve body cannot fit tightly together, resulting in poor sealing. Utility Model Content

[0004] The purpose of this invention is to provide a valve for welded steel cylinders with a valve stem containing a metal insert, which can significantly improve the sealing performance between the valve stem and the valve body, reduce gas leakage, and ensure that the valve has long-term stable airtightness.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a valve for welded steel cylinders with a valve stem containing a metal insert, comprising a valve body and a valve stem assembly disposed within the valve body, wherein the valve body has an air inlet at its bottom and an air outlet on its side; the valve stem assembly comprises a valve stem body and a sealing element disposed in the middle of the valve stem body, the valve body has an air inlet channel, and the valve stem assembly moves relative to the air inlet channel to control the flow of gas from the air inlet to the air outlet; the sealing element is a metal insert.

[0006] By adopting the above technical solutions, the high density and smoothness of the metal inserts can effectively improve the sealing condition of the valve stem and valve seat, reduce the risk of leakage, and extend the overall service life of the device. At the same time, the friction generated when the seal rotates between the seal and the valve body is small, the valve stem moves more smoothly, and the user experience is improved.

[0007] The present invention is further configured such that: the valve stem body is made of plastic, and the sealing element is made of one or more of copper, stainless steel, iron, aluminum, and zinc alloy.

[0008] By adopting the above technical solution, the valve stem body has a lower weight and a certain degree of elasticity, while the sealing element, being made of metal, has higher strength and a smoother surface. The combination of the two not only reduces the overall weight of the valve stem assembly, but also ensures the structural strength and sealing performance of key sealing parts.

[0009] The present invention is further configured such that: the sealing element is provided with a plurality of annular grooves, and a sealing ring is provided in each of the annular grooves.

[0010] By adopting the above technical solutions, the sealing effect between the valve stem and the valve body can be enhanced, the leakage of high-pressure gas during valve stem movement can be reduced, and the airtightness and safety of the valve can be further improved.

[0011] The present invention is further configured such that: the valve stem body includes a movable part, a blocking part, and a handle part provided on the movable part; one end of the sealing member is embedded with the movable part, and the other end of the sealing member is embedded with the blocking part; the movable part is threadedly engaged with the valve body.

[0012] By adopting the above technical solutions, the valve operation is smoother, the handle is easier to apply force manually, and the threaded lifting structure allows the valve stem to move smoothly along the axial direction, thereby accurately controlling the gas flow and reducing the wear of the seals.

[0013] The present invention is further configured such that: the upper and lower ends of the sealing member are respectively provided with an upper connecting member and a lower connecting member; the movable part is provided with an upper connecting groove; the blocking part is provided with a lower connecting groove; the upper connecting member is limited to the upper connecting groove; and the lower connecting member is anti-detached from the lower connecting groove.

[0014] By adopting the above technical solution, a stable connection is achieved between the sealing component and the moving part and the blocking part. The upper connecting component and the lower connecting component are matched with the corresponding upper connecting groove and lower connecting groove to prevent loosening and improve the overall structural strength.

[0015] The present invention is further configured such that: both the upper connecting member and the lower connecting member are splined shafts, and the upper connecting groove and the lower connecting groove are corresponding spline grooves.

[0016] By adopting the above technical solution, the spline structure enables multi-point engagement between the seal, the moving part, and the blocking part, which can effectively improve the torsional resistance and prevent the connection from loosening due to frequent rotation.

[0017] The present invention is further configured such that: the upper connecting member and the lower connecting member are both polygonal limiting blocks, and the upper connecting groove and the lower connecting groove are corresponding polygonal limiting grooves.

[0018] By adopting the above technical solution, the polygonal limiting block and the upper and lower connecting grooves have a simple structure and are easy to process. It can reduce manufacturing costs while ensuring sufficient torsional resistance, and is suitable for products with low strength requirements.

[0019] The present invention is further configured such that: the bottom of the valve body is provided with an air intake baffle extending toward the center, the center of the air intake baffle forms an air intake channel, and the air intake baffle abuts against the blockage part.

[0020] By adopting the above technical solution, when the blockage part comes into contact with the air intake baffle, the air intake passage is closed. When the movable part moves the blockage part upward, the air intake passage is opened, allowing air to pass through smoothly.

[0021] The present invention is further configured such that: the top of the valve body is provided with a limiting stop extending toward the center, and the limiting stop abuts and cooperates with the movable part.

[0022] By adopting the above technical solution, the limiting stop can prevent the valve stem from coming out of the valve body when it is rotated counterclockwise to the limit position, ensuring operational safety and preventing the valve stem from loosening due to vibration during transportation or use.

[0023] In summary, this utility model has the following beneficial effects: 1. The sealing element in the valve stem assembly of this utility model is made of metal material with high density and strength, and its surface finish is better than that of the valve stem body. It can significantly improve the sealing state between the valve stem and the valve body, reduce friction when the valve stem body rotates, reduce gas leakage, and ensure the long-term stable airtightness of the bottle valve.

[0024] 2. The valve stem body of this utility model is made of engineering plastic, which is lightweight and elastic, making it easy for the valve stem to rise and fall smoothly in the valve body. At the same time, the key stress-bearing parts are reinforced by metal seals, resulting in a low overall weight and sufficient strength.

[0025] 3. The upper and lower connectors can be selected from splined shafts and splined grooves according to the usage requirements, providing multi-point meshing and strong anti-torsion capability, suitable for products with frequent rotation and high precision requirements; or polygonal limit blocks and polygonal limit grooves can be selected, which are simple to process and low in cost, suitable for products with low strength requirements. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 This is a cross-sectional view of the present invention.

[0028] Figure 3 This is an exploded view of Example 1.

[0029] Figure 4 This is an exploded view of Embodiment 2, which has a quadrilateral limiting block.

[0030] Figure 5 This is an exploded view of Embodiment 2 with a hexagonal limiting block.

[0031] In the diagram: 1. Valve body; 11. Air inlet; 12. Air outlet; 13. Air inlet baffle; 14. Air inlet passage; 15. Limiting baffle; 2. Valve stem assembly; 21. Seal; 211. Annular groove; 212. Sealing ring; 213. Upper connector; 214. Lower connector; 22. Moving part; 221. Upper connecting groove; 23. Blocking part; 231. Lower connecting groove; 24. Handle. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] like Figure 1 and Figure 2 As shown, this utility model provides a welded steel cylinder valve with a valve stem containing a metal insert. It includes a valve body 1 and a valve stem assembly 2 disposed inside the valve body 1. The bottom of the valve body 1 has an inlet 11 for communication with a gas source, and the side of the valve body 1 has an outlet 12 for communication with an external device. The valve stem assembly 2 consists of a valve stem body and a metal sealing element 21 installed in the middle of the valve stem body. The valve stem body can move up and down along the axial direction of the valve body 1, thereby controlling the flow of gas from the inlet 11 to the outlet 12. The valve stem body is made of plastic material to reduce overall weight and provide a certain degree of elasticity. The sealing element 21 is a metal insert, which can be made entirely of metal or a composite structure with an external metal coating, i.e., within a plastic substrate. A metal cladding layer is formed on the outer side of the valve stem assembly. While maintaining the metallic properties of the surface, the insert is made lighter. The metal material can be one or more of copper, stainless steel, iron, aluminum, and zinc alloy. These materials have a higher density than the valve stem body and have a finely processed surface with high smoothness, thereby improving the sealing performance of the valve stem and valve seat contact area, reducing the risk of gas leakage, and extending the service life. The sealing element 21 is provided with several annular grooves 211, and a sealing ring 212 is provided in each annular groove 211. The inner part of the sealing ring 212 abuts against the surface of the annular groove 211, and the outer part of the sealing ring 212 abuts against the inner wall of the valve body 1, further enhancing the airtight effect between the valve stem assembly and the valve body 1 and preventing high-pressure gas from leaking when the valve stem assembly moves.

[0034] like Figure 1 and Figure 2As shown, the valve stem body includes a movable part 22, a blocking part 23, and a handle part 24 disposed on the movable part 22. One end of the sealing member 21 is molded with the movable part 22, and the other end is molded with the blocking part 23. The handle part 24 is rotated by the operator to apply force, causing the movable part 22 to move axially within the valve body 1. The blocking part 23 is located at the bottom of the valve body 1 and is disposed opposite to the air inlet baffle 13 of the valve body 1. An air inlet channel 14 is formed in the center of the air inlet baffle 13. When the valve is closed, the blocking part 23 is tightly fitted with the air inlet baffle 13, blocking the gas passage. When the operator rotates the handle part 24, the movable part 22 causes the blocking part 23 to move away from the air inlet baffle 13, the air inlet channel 14 is opened, and the gas smoothly enters the interior of the valve body 1. A limiting baffle 15 is formed at the top of the valve body 1 to prevent the valve stem assembly 2 from disengaging from the valve body 1 when rotated to the limit position.

[0035] like Figure 1 and Figure 2 As shown, the upper end of the seal 21 is provided with an upper connector 213 and the lower end is provided with a lower connector 214. The movable part 22 of the valve stem body is provided with an upper connecting groove 221 that cooperates with the upper connector 213, and the plugging part 23 is provided with a lower connecting groove 231 that cooperates with the lower connector 214. With this structure, the seal 21 can be stably installed between the movable part 22 and the plugging part 23, effectively preventing loosening caused by vibration or rotation.

[0036] like Figure 3 As shown, in this embodiment, both the upper connector 213 and the lower connector 214 adopt a spline shaft structure. The upper connecting groove 221 and the lower connecting groove 231 are corresponding spline grooves. The surface of the spline shaft is provided with multiple axially distributed teeth, which can mesh with the toothed grooves in the spline grooves at multiple points, thereby providing a reliable anti-torsional torque between the seal 21 and the valve stem body, preventing the seal 21 from loosening due to frequent rotation or large operating force. At the same time, the spline has high assembly precision, which can ensure the concentricity of the seal 21 with the moving part 22 and the blocking part 23, making the valve stem body rotate more smoothly in the valve body 1 and reducing friction and wear.

[0037] In this embodiment, the valve body 1 is fixed to the mouth of the gas cylinder by welding. The air inlet 11 at the bottom of the valve body 1 is connected to the inner cavity of the gas cylinder, and the air outlet 12 on the side of the valve body 1 is connected to the external delivery pipeline. When it is necessary to close the valve, the operator rotates the handle 24 clockwise. The movable part 22 moves downward along the axial direction of the valve body 1 through the threaded structure, causing the sealing part 21 and the blocking part 23 to descend synchronously until the blocking part 23 fits against the air inlet baffle 13, sealing the air inlet channel 14 and completely blocking the gas flow. 21 has a high density and a smooth surface, resulting in low friction and tight fit when in contact with valve body 1 and valve seat. It is further sealed by the sealing ring 212 set in the annular groove 211, ensuring good airtightness of the bottle valve in the closed state. When the bottle valve needs to be opened, the operator rotates the handle part 24 counterclockwise. The moving part 22 drives the valve stem body to rise along the thread, and the blocking part 23 gradually disengages from the air inlet baffle 13. The air inlet channel 14 is opened, and the gas in the cylinder enters the inner cavity of valve body 1 through the air inlet 11 and flows to the external pipeline along the air outlet 12.

[0038] Example 2: A valve for welded steel cylinders with a valve stem containing a metal insert, such as Figure 4 and Figure 5 As shown, the structure of this embodiment is basically the same as that of Embodiment 1. The difference lies in the connection form between the sealing element 21 and the movable part 22 and the blocking part 23. The upper and lower ends of the sealing element 21 are respectively set as polygonal limiting blocks, including but not limited to: quadrilateral, hexagonal, and octagonal. The ends of the movable part 22 and the blocking part 23 are respectively provided with polygonal limiting grooves that cooperate with the limiting blocks. The polygonal limiting blocks fit together with the inner wall of the limiting groove through their multiple flat sides to form a stable limit. The polygonal limiting block structure is simple to process and easy to assemble. It can reduce manufacturing costs while ensuring sufficient torsional resistance. It is especially suitable for bottle valve products with relatively low strength requirements and the need to control production costs.

[0039] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A valve for welded steel cylinders with a valve stem containing a metal insert, comprising a valve body (1) and a valve stem assembly (2) disposed within the valve body (1), characterized in that: The valve body (1) has an air inlet (11) at the bottom and an air outlet (12) on the side. The valve stem assembly (2) includes a valve stem body and a sealing element (21) located in the middle of the valve stem body. The valve body (1) is provided with an air inlet channel (14). The valve stem assembly (2) moves relative to the air inlet channel (14) to control the flow of gas from the air inlet (11) to the air outlet (12). The sealing element (21) is a metal insert.

2. The valve for welded steel cylinders with a valve stem containing a metal insert according to claim 1, characterized in that: The valve stem body is made of plastic, and the sealing element (21) is made of one or more of copper, stainless steel, iron, aluminum, and zinc alloy.

3. A valve for welded steel cylinders with a valve stem containing a metal insert according to claim 1, characterized in that: The sealing element (21) is provided with a plurality of annular grooves (211), and a sealing ring (212) is provided in each annular groove (211).

4. A valve for welded steel cylinders with a valve stem containing a metal insert according to claim 1, characterized in that: The valve stem body includes a movable part (22), a blocking part (23), and a handle part (24) provided on the movable part (22). One end of the sealing member (21) is fitted with the movable part (22), and the other end of the sealing member (21) is fitted with the blocking part (23). The movable part (22) is threadedly engaged with the valve body (1).

5. A valve for welded steel cylinders with a valve stem containing a metal insert according to claim 4, characterized in that: The sealing element (21) has an upper connector (213) and a lower connector (214) at its upper and lower ends, respectively. The movable part (22) has an upper connecting groove (221), and the blocking part (23) has a lower connecting groove (231). The upper connector (213) is in a limiting fit with the upper connecting groove (221), and the lower connector (214) is in a limiting fit with the lower connecting groove (231).

6. A valve for welded steel cylinders with a valve stem containing a metal insert according to claim 5, characterized in that: The upper connector (213) and the lower connector (214) are both spline shafts, and the upper connecting groove (221) and the lower connecting groove (231) are corresponding spline grooves.

7. A valve for welded steel cylinders with a valve stem containing a metal insert according to claim 5, characterized in that: The upper connector (213) and the lower connector (214) are both polygonal limiting blocks, and the upper connecting groove (221) and the lower connecting groove (231) are corresponding polygonal limiting grooves.

8. A valve for welded steel cylinders with a valve stem containing a metal insert according to claim 4, characterized in that: The valve body (1) has an air intake baffle (13) extending towards the center at the bottom. The air intake baffle (13) forms the air intake channel (14) at the center. The air intake baffle (13) abuts against the blockage part (23).

9. A valve for welded steel cylinders with a valve stem containing a metal insert according to claim 4, characterized in that: The valve body (1) has a limiting stop (15) extending towards the center at the top, and the limiting stop (15) is anti-detached from the movable part (22).

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