A cylinder valve

Abstract

The utility model discloses a kind of steel bottle valves, it relates to the technical field of electronic special gas industry, including valve body, the valve body is opened with valve cavity, the valve cavity includes air cavity and installation cavity sequentially arranged from bottom to top and is connected, the valve body is opened with air inlet channel and air outlet channel with air cavity intercommunication, the installation cavity is equipped with fixed nut, the fixed nut is opened with through joint cavity, the through joint cavity is equipped with the sealing assembly that the air inlet channel's air port is sealed;This kind of steel bottle valve, when staff rotates wheel handle and drives first threaded head fixedly connected on valve rod relative fixed nut rotation, and drive the top end of first threaded head and the top of limiting section abutment process, valve rod is moved up relative fixed nut, and drive interference insertion in the cooperation of slot and clamping block on the plugging block of coupling and move up, so that sealing ring and convex edge are separated, so as to realize the sealing of air inlet channel opening.

Description

Technical Field

[0001] This utility model relates to the technical field of electronic special gases industry, specifically a gas cylinder valve. Background Technology

[0002] Cylinder valves have wide applications in various industries with special performance requirements for gases, such as electronic gases, petrochemical gases, and standard gases. For example, electronic gases used in integrated circuits are not only extremely pure but also corrosive. Therefore, this places corresponding requirements on a series of accessories such as devices, equipment, control components, and pipelines used in the production and use of these gases, and valves are one of the first issues to be addressed.

[0003] The concealed structure inside the cylinder valve in current technology makes installation difficult and requires customized tooling. Utility Model Content

[0004] The purpose of this utility model is to provide a cylinder valve to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas cylinder valve, comprising a valve body, wherein a valve cavity is formed within the valve body, the valve cavity comprising a gas cavity and an installation cavity arranged sequentially from bottom to top and connected to each other, the valve body having an inlet channel and an outlet channel communicating with the gas cavity, a fixing nut being provided in the installation cavity, a connecting cavity being provided on the fixing nut, and a sealing assembly for blocking the gas inlet of the inlet channel being provided in the connecting cavity, the sealing assembly comprising a valve stem, the bottom of the valve stem being fixedly connected to a first threaded head threadedly connected to the inner wall of the connecting cavity, the first threaded head being connected to a coupling via a detachable mechanism, the coupling having a snap-fit ​​cavity, and a sealing element located in the gas cavity and blocking the inlet channel being connected in the snap-fit ​​cavity.

[0006] Preferably, the detachable mechanism includes a slot formed on the first threaded head, and a locking block that engages with the slot is fixedly connected to the coupling.

[0007] Preferably, the slot has a shaft hole coaxial with the valve stem, and the shaft hole contains bearing steel balls.

[0008] Preferably, the sealing component includes a sealing block, a connecting rod is fixedly connected to the sealing block, the connecting rod is interference-fitted with the snap-fit ​​cavity, a diaphragm is fixedly connected to the connecting rod, a sealing valve cap is provided between the top of the diaphragm and the bottom of the fixing nut, and an annular groove is provided at the bottom of the sealing block, and a sealing ring is provided in the annular groove.

[0009] Preferably, the diaphragm has a flat central portion and an arc-shaped peripheral portion, the arc-shaped portion of the diaphragm abuts and fits against the bottom of the sealing valve cap, and the mounting cavity has a groove for the edge of the diaphragm to fit.

[0010] Preferably, the air inlet of the air intake channel communicating with the air chamber has a raised edge protruding towards the air chamber, and the sealing ring abuts against the raised edge to block the air intake channel.

[0011] Preferably, the connecting cavity includes an outlet section, a limiting section, and a threaded section that are connected to each other. The diameter of the first threaded head in the threaded section is larger than the diameter of the valve stem. The valve stem body fits against the inner wall of the outlet section. The diameter of the limiting section is larger than the diameter of the threaded section.

[0012] Preferably, a retaining sleeve that is interference-fitted with the inner wall of the mounting cavity is fixedly connected to the peripheral side of the fixing nut, and both ends of the retaining sleeve have inclined guide surfaces.

[0013] Preferably, the valve stem is fitted with a wheel handle via an interference fit, and a second threaded head is fixedly connected to the top of the valve stem, with a blocking block threadedly connected to the second threaded head.

[0014] Preferably, an indicator plate is fixedly connected to the top of the blocking block, and the indicator plate has an arrow marking the direction of the wheel handle rotation.

[0015] In the above technical solution, the present invention provides a cylinder valve in which, when the operator rotates the wheel handle to drive the first threaded head fixedly connected to the valve stem to rotate relative to the fixed nut, and drives the top of the first threaded head to abut against the top of the limiting section, the valve stem moves upward relative to the fixed nut, and under the cooperation of the slot and the locking block, drives the sealing block that is interference-fitted into the coupling to move upward, thereby separating the sealing ring from the raised edge, thus realizing the sealing of the air intake passage. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0018] Figure 2 An exploded view of the overall structure provided for an embodiment of this utility model;

[0019] Figure 3A cross-sectional view of the overall structure provided for an embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the valve body provided in an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the fixing nut provided in an embodiment of the present utility model;

[0022] Figure 6 An exploded view of the valve stem and coupling provided in an embodiment of this utility model;

[0023] Figure 7 This is a schematic diagram of the sealing block provided in an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Valve body; 2. Air chamber; 3. Mounting chamber; 4. Inlet passage; 5. Outlet passage; 6. Fixing nut; 7. Connecting chamber; 71. Outlet section; 72. Limiting section; 73. Threaded section; 8. Valve stem; 9. First threaded end; 10. Coupling; 11. Snap-fit ​​chamber; 12. Slotted; 13. Locking block; 14. Bearing ball; 15. Connecting rod; 16. Diaphragm; 17. Sealing valve cap; 18. Sealing ring; 19. Second threaded end; 20. Handle; 21. Blocking block; 22. Indicator plate; 23. Sealing block. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] Please see Figure 1-7 This utility model provides a gas cylinder valve, including a valve body 1. The valve body 1 has a valve cavity, which includes a gas cavity 2 and a mounting cavity 3 arranged sequentially from bottom to top and connected to each other. The valve body 1 has an inlet channel 4 and an outlet channel 5 that communicate with the gas cavity 2. The mounting cavity 3 has a fixing nut 6, and the fixing nut 6 has a connecting cavity 7. The connecting cavity 7 has a sealing assembly that blocks the gas port of the inlet channel 4. The sealing assembly includes a valve stem 8. The bottom of the valve stem 8 is fixedly connected to a first threaded head 9 that is threaded to the inner wall of the connecting cavity 7. The first threaded head 9 is connected to a coupling 10 via a detachable mechanism. The coupling 10 has a snap-fit ​​cavity 11, and the snap-fit ​​cavity 11 is connected to a sealing element located in the gas cavity 2 that blocks the inlet channel 4.

[0028] The detachable mechanism includes a slot 12 formed on the first threaded head 9, and a locking block 13 fixedly connected to the coupling 10 to engage with the slot 12.

[0029] The slot 12 has a shaft hole coaxial with the valve stem 8, and the shaft hole contains bearing steel balls 14.

[0030] The sealing component includes a sealing block 23, on which a connecting rod 15 is fixedly connected. The connecting rod 15 is press-fitted into the snap-fit ​​cavity 11. A diaphragm 16 is fixedly connected to the connecting rod 15. A sealing valve cap 17 is provided between the top of the diaphragm 16 and the bottom of the fixing nut 6. An annular groove is formed at the bottom of the sealing block 23, and a sealing ring 18 is provided in the annular groove. It should be noted that, in a preferred embodiment of this solution, multiple diaphragms 16 are provided, and multiple layers of diaphragms 16 are stacked and fixedly connected to the connecting rod 15. Furthermore, the diaphragms 16 and the connecting rod 15 are connected using a laser welding process in the prior art, and the multiple layers of diaphragms 16 are welded layer by layer in batches. Furthermore, based on the elastic characteristics of the sealing ring 18, the sealing ring 18 and the annular groove are snap-fitted together. Therefore, during installation, the sealing ring 18 needs to be snapped into the annular groove first.

[0031] The diaphragm 16 has a flat central portion and an arc-shaped peripheral portion. The arc-shaped peripheral portion of the diaphragm 16 abuts and fits against the bottom of the sealing valve cap 17. The mounting cavity 3 has a groove for the edge of the diaphragm 16 to fit. The flat central portion of the diaphragm 16 facilitates welding with the connecting rod 15, while the arc-shaped peripheral portion of the diaphragm 16 allows the edge of the diaphragm 16 to fit better into the groove when it is installed in the valve body 1, thereby improving the sealing performance. Furthermore, it can further reduce the stress concentration problem caused by the displacement of the diaphragm 16, thereby further improving the sealing performance.

[0032] Furthermore, such as Figure 6-7 As shown, flat surfaces are milled on the coupling 10 and the sealing block 23 respectively, so that workers can pre-clamp the coupling 10 and the sealing block 23 with conventional tools, thereby facilitating installation.

[0033] The air inlet of the air intake channel 4, which connects to the air chamber 2, has a raised edge protruding towards the air chamber 2. When the sealing ring 18 abuts against this raised edge, it seals the air intake channel 4. Specifically, when the sealing ring 18 abuts against the raised edge, the entire sealing block 23 seals the air intake channel 4, preventing gas from entering. Furthermore, the diaphragm 16 serves as a second layer of sealing, preventing gas in the air chamber 2 from being released from the mounting cavity 3, thus achieving a better sealing effect.

[0034] The connecting cavity 7 includes an outlet section 71, a limiting section 72, and a threaded section 73 that are connected to each other. The diameter of the first threaded head 9, which is threaded into the threaded section 73, is larger than the diameter of the valve stem 8. The stem of the valve stem 8 is in contact with the inner wall of the outlet section 71. The diameter of the limiting section 72 is larger than the diameter of the threaded section 73.

[0035] The valve stem 8 is fitted with a wheel handle 20 via an interference fit. A second threaded head 19 is fixedly connected to the top of the valve stem 8, and a blocking block 21 is threaded onto the second threaded head 19. It should be noted that the diameter of the second threaded head 19 is smaller than the diameter of the valve stem 8 to facilitate the installation of the wheel handle 20.

[0036] Specifically, when the operator rotates the wheel 20 to drive the first threaded head 9, which is fixedly connected to the valve stem 8, to rotate relative to the fixed nut 6, and drives the top of the first threaded head 9 to abut against the top of the limiting section 72, the valve stem 8 moves upward relative to the fixed nut 6. In the cooperation of the slot 12 and the locking block 13, the sealing block 23, which is interference-fitted into the coupling 10, moves upward, thereby causing the sealing ring 18 to separate from the raised edge, thus achieving the sealing of the air intake passage 4.

[0037] The fixing nut 6 has a retaining sleeve fixedly connected to its peripheral side, which is interference-fitted with the inner wall of the mounting cavity 3. Both ends of the retaining sleeve have inclined guide surfaces. The guide surfaces facilitate the insertion and installation by the operator.

[0038] The top of the blocking block 21 is fixedly connected to an indicator 22, which has an arrow indicating the direction of rotation of the handle 20. This allows operators to easily turn the handle 20 according to the arrow on the indicator 22, thus opening and closing the entire device.

[0039] Specifically, the installation process is as follows: First, pass the connecting rod 15 through the center of the sealing nut, then insert the connecting rod 15 into the snap-fit ​​cavity 11 opened on the connecting shaft through an interference fit. Then, place the bearing steel ball 14 in the shaft hole and drive the snap-fit ​​block 13 fixedly connected to the coupling 10 into the slot 12. Further, pass the valve stem 8 through the through cavity 7 of the fixing nut 6 until the first threaded head 9 abuts against the thread in the through cavity 7. Then drive the valve stem 8 to rotate until the top of the first threaded head 9 abuts against the top of the limiting section 72. Then, insert the wheel handle 20 into the valve stem 8 through an interference fit. Then, thread the limiting block into the second threaded head 19. Finally, fix the fixing nut 6 into the mounting cavity 3 through an interference fit.

[0040] The above installation process is simple to operate, and the entire device has a simple structure, is easy to process and install, and has high reliability, while greatly reducing the difficulty of tooling and assembly.

[0041] Furthermore, the entire installation adopts an internal and external clamping structure design to resist the medium force of loosening between the fixing nut 6 and the valve body 1, and between the sealing block 23 and the coupling 10, which can provide a reliable sealing effect to the greatest extent.

[0042] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cylinder valve, characterized in that, The device includes a valve body, within which a valve cavity is formed. The valve cavity comprises an air chamber and a mounting cavity arranged sequentially from bottom to top and connected to each other. The valve body has an air inlet channel and an air outlet channel communicating with the air chamber. A fixing nut is provided in the mounting cavity. A connecting cavity is provided in the fixing nut. A sealing assembly is provided in the connecting cavity to block the air inlet of the air inlet channel. The sealing assembly includes a valve stem. The bottom of the valve stem is fixedly connected to a first threaded head that is threaded to the inner wall of the connecting cavity. A coupling is connected to the first threaded head via a detachable mechanism. A snap-fit ​​cavity is provided on the coupling. A sealing element located in the air chamber and blocking the air inlet channel is connected in the snap-fit ​​cavity.

2. A cylinder valve according to claim 1, characterized in that, The detachable mechanism includes a slot formed on the first threaded head, and a locking block that engages with the slot is fixedly connected to the coupling.

3. A cylinder valve according to claim 2, characterized in that, The slot has a shaft hole coaxial with the valve stem, and the shaft hole contains bearing steel balls.

4. A cylinder valve according to claim 1, characterized in that, The sealing component includes a sealing block, a connecting rod fixedly connected to the sealing block, the connecting rod being interference-fitted with the snap-fit ​​cavity, a diaphragm fixedly connected to the connecting rod, a sealing valve cap being provided between the top of the diaphragm and the bottom of the fixing nut, and an annular groove being provided at the bottom of the sealing block, with a sealing ring provided in the annular groove.

5. A cylinder valve according to claim 4, characterized in that, The diaphragm has a flat central portion and an arc-shaped peripheral portion. The arc-shaped portion of the diaphragm abuts and fits against the bottom of the sealing valve cap. The mounting cavity has a groove for the edge of the diaphragm to fit.

6. A cylinder valve according to claim 4, characterized in that, The air inlet of the air intake channel, which connects to the air chamber, has a raised edge that protrudes towards the air chamber. When the sealing ring abuts against the raised edge, it seals the air intake channel.

7. A cylinder valve according to claim 1, characterized in that, The connecting cavity includes an outlet section, a limiting section, and a threaded section that are connected together. The diameter of the first threaded head in the threaded section is larger than the diameter of the valve stem. The valve stem body fits against the inner wall of the outlet section. The diameter of the limiting section is larger than the diameter of the threaded section.

8. A cylinder valve according to claim 1, characterized in that, The retaining nut has a retaining sleeve that is interference-fitted with the inner wall of the mounting cavity on its peripheral side. Both ends of the retaining sleeve have inclined guide surfaces.

9. A cylinder valve according to claim 1, characterized in that, The valve stem is fitted with a wheel handle via an interference fit, and a second threaded head is fixedly connected to the top of the valve stem. The second threaded head is threadedly connected to a blocking block.

10. A cylinder valve according to claim 9, characterized in that, An indicator sign is fixedly connected to the top of the blocking block, and the indicator sign has an arrow marking the direction of the wheel handle rotation.

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