A cylinder valve for vacuum and high pressure

Abstract

This invention relates to a cylinder valve for vacuum and high-pressure applications, belonging to the field of cylinder valve technology. It includes a valve body and a rotating wheel. A first valve stem is rotatably mounted inside the valve body, with a rotating wheel fixed to its top. A drive assembly is located at the bottom of the first valve stem. A second valve stem is rotatably mounted inside the valve body, with a guide groove on its surface. An adjusting disc is rotatably mounted at the end of the second valve stem, with a guide block fixed to its inner wall and a telescopic connecting rod fixed to its side wall. A sealing block is fixed to the end of the second valve stem, and a compensation assembly is located inside the sealing block. This invention, through the rotating wheel, first valve stem, second valve stem, and drive assembly, uses a constant-force spring as the power storage and output component. Utilizing the stable and constant-force output characteristics of the constant-force spring, the valve stem is smoothly driven, making the valve opening, closing, and adjustment process more uniform and smooth.

Description

Technical Field

[0001] This invention relates to the field of cylinder valve technology, specifically to a cylinder valve for vacuum and high pressure applications. Background Technology

[0002] Cylinder valves for vacuum and high-pressure applications are specialized opening and closing control devices designed for pressure conditions. They can withstand both high positive pressure and high vacuum environments and are widely used in industrial gases, specialty gases, semiconductor manufacturing, vacuum equipment, and laboratory gas supply systems. They are core safety components for gas storage, transportation, and precise delivery. These valves are primarily made of high-strength alloys and high-purity stainless steel, balancing pressure resistance with low outgassing characteristics. The core structure consists of the valve body, valve stem, valve core, composite sealing components, and safety devices. The valves are manually operated by rotation, requiring minimal operating torque and offering reliable positioning. They allow for precise adjustment of gas flow and output pressure. With advantages such as high pressure resistance, vacuum resistance, low leakage, high cleanliness, and long service life, these cylinder valves are suitable not only for conventional inert gases but also for the safe delivery of flammable, explosive, toxic, corrosive, and ultra-high purity electronic specialty gases. They are indispensable key fluid control components in high-end manufacturing, scientific research experiments, and special working conditions, and are crucial components in electronic-grade specialty gas packaging materials for the semiconductor industry. They can meet the requirements of negative pressure vacuum, high pressure, and high cleanliness operating environments.

[0003] However, in practical applications of existing gas cylinder valves under vacuum and high-pressure conditions, their sealing structure mostly relies on a single rubber gasket or ordinary sealing ring as the core sealing element. Under high-pressure impact, frequent opening and closing, media corrosion, and alternating high and low temperatures, the rubber gasket is prone to aging and wear. Once the rubber gasket wears or fails, the valve is not equipped with a protective and automatic compensation structure, and a through gap is instantly formed on the sealing surface, causing the gas inside the cylinder to leak directly. At the same time, gas cylinder valves generally adopt a simple manual direct-drive structure, and it is difficult for operators to maintain a stable speed during rotation. This can easily lead to sudden changes in speed and uneven force, resulting in unstable valve core lifting and lowering, exacerbating local stress and uneven wear on the sealing gasket, and further shortening the sealing life.

[0004] To address the aforementioned issues, innovative design based on existing methods is urgently needed. Summary of the Invention

[0005] The purpose of this invention is to provide a cylinder valve for vacuum and high pressure applications, which solves the problems mentioned in the background art, such as the lack of protection and automatic compensation structures in existing cylinder valves and the uneven speed during manual operation. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cylinder valve for vacuum and high pressure, comprising a valve body and a rotary wheel, wherein a first valve stem is rotatably mounted inside the valve body, a rotary wheel is fixed to the top of the first valve stem, a drive assembly is provided at the bottom of the first valve stem, a second valve stem is rotatably mounted inside the valve body, a guide groove is provided on the surface of the second valve stem, an adjusting disc is rotatably mounted at the end of the second valve stem, a guide block is fixed to the inner wall of the adjusting disc, a telescopic connecting rod is fixed to the side wall of the adjusting disc, a sealing block is fixed to the end of the second valve stem, and a compensation assembly is provided inside the sealing block; The drive assembly includes a first drive block and a second drive block threadedly mounted in the valve body. Both the first drive block and the second drive block have a one-way toothed ring fixed on their surfaces. It also includes a limiting drive block fixed to the end of the first valve stem, and two rotating blocks elastically slidably mounted in the valve body. The rotating blocks have a limiting groove on their surface and a mating toothed ring fixed on their surface. A constant force spring is provided on the side wall of the rotating blocks.

[0007] Preferably, the first drive block and the second drive block are fixedly connected, a first valve stem is rotatably installed inside the first drive block, and a second valve stem is fixedly connected to the bottom of the second drive block.

[0008] Preferably, the limiting drive block is located between two rotating blocks, which are connected by a buffer spring, and the constant force springs provided on the sidewalls of the two rotating blocks rotate in opposite directions.

[0009] Preferably, both ends of the limiting drive block are designed with bevels, and the one-way toothed ring meshes with the mating toothed ring in one direction.

[0010] Preferably, the compensation component includes a fixed block fixed inside the sealing block and a rotating disk rotatably installed inside the sealing block. Multiple movable rods are slidably installed on the surface of the fixed block, movable blocks are fixed on the surface of the movable rods, and a pressing block is fixed at the end of the movable rod. Multiple rotating grooves are opened on the surface of the rotating disk, and it also includes a movable groove opened on the surface of the sealing block.

[0011] Preferably, the guide block is located on the inner wall of the guide groove, and the guide groove has a spiral design.

[0012] Preferably, the telescopic connecting rod passes through the movable groove and is fixedly connected to the rotating disk.

[0013] Preferably, the movable block is located in a rotating groove, and the rotating groove is designed to be inclined.

[0014] Preferably, the pressing block is in close contact with the inner wall of the sealing block.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the setting of a rotating wheel, a first valve stem, a second valve stem, and a drive assembly, uses a constant force spring as a power storage and output component. It first stores the energy for manual operation, and utilizes the stable and constant force output characteristics of the constant force spring to smoothly drive the valve stem movement. This eliminates problems such as uneven rotation speed and inconsistent force that occur during direct manual operation, making the valve opening, closing, and adjustment process more uniform and smooth, improving operational stability and control accuracy, and extending the overall service life of the valve.

[0016] 2. This invention, through the provision of a second valve stem, adjusting disc, telescopic connecting rod, and compensation assembly, forms a self-adjusting sealing structure inside the valve body to prevent gas leakage. This provides a buffer space for leaking gas. When a gas leakage trend occurs, the leaking gas pushes the adjusting disc to move, controlling the moving rod to move the pressure block. This causes the sealing block to expand radially, tightly fitting against the inner wall of the valve body, forming a sealing compensation to prevent leakage. When the sealing block experiences wear or aging, the compensation function is automatically activated to block the leakage channel, preventing direct gas leakage and improving the sealing reliability and safety of the valve body. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the valve body of the present invention; Figure 2 This is a schematic diagram of the valve body and impeller of the present invention; Figure 3 This is a partial structural diagram of the present invention; Figure 4 This is a schematic diagram of the structure of the limiting drive block and the rotating block of the present invention; Figure 5 This is a schematic diagram of the structure of the first driving block and the second driving block of the present invention; Figure 6 This is a cross-sectional view of the sealing block of the present invention; Figure 7 This is a schematic diagram of the disassembled structure of the compensation component of the present invention; Figure 8 This is a schematic diagram of the disassembled structure of the compensation component from another perspective of the present invention.

[0018] In the diagram: 1. Valve body; 101. Rotary wheel; 2. First valve stem; 201. Second valve stem; 202. Limiting drive block; 203. Guide groove; 3. First drive block; 301. Second drive block; 302. One-way gear ring; 4. Rotating block; 401. Limiting groove; 402. Matching gear ring; 403. Constant force spring; 5. Adjusting disc; 501. Guide block; 502. Telescopic connecting rod; 6. Sealing block; 601. Moving groove; 7. Rotating disc; 701. Rotating groove; 8. Fixed block; 801. Moving rod; 802. Moving block; 803. Pressing block. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] Please see Figures 1-8 The present invention provides a technical solution: a cylinder valve for vacuum and high pressure, comprising a valve body 1 and a rotary wheel 101, a first valve stem 2 rotatably mounted inside the valve body 1, a rotary wheel 101 fixed at the top of the first valve stem 2, the first valve stem 2 and the rotary wheel 101 forming a manual operation end, a drive assembly provided at the bottom of the first valve stem 2, a second valve stem 201 rotatably mounted inside the valve body 1, a guide groove 203 opened on the surface of the second valve stem 201, an adjusting disc 5 rotatably mounted at the end of the second valve stem 201, a guide block 501 fixed on the inner wall of the adjusting disc 5, a telescopic connecting rod 502 fixed on the side wall of the adjusting disc 5, a sealing block 6 fixed at the end of the second valve stem 201, and a compensation assembly provided inside the sealing block 6; The drive assembly includes a first drive block 3 and a second drive block 301 threadedly installed inside the valve body 1. Both the first drive block 3 and the second drive block 301 have a one-way toothed ring 302 fixed on their surfaces. It also includes a limiting drive block 202 fixed to the end of the first valve stem 2, and two rotating blocks 4 elastically slidably installed inside the valve body 1. The rotating blocks 4 have a limiting groove 401 on their surface and a mating toothed ring 402 fixed on their surface. A constant force spring 403 is provided on the side wall of the rotating blocks 4. The first drive block 3, the second drive block 301 and the one-way toothed ring 302 form a one-way transmission structure. With the constant force spring 403, energy storage and constant force output are achieved, eliminating the impact and jamming caused by uneven speed and unstable force when manually rotating the wheel 101, making the movement of the second valve stem 201 more stable and uniform.

[0021] In one embodiment of the present invention, the first driving block 3 and the second driving block 301 are fixedly connected. The first valve stem 2 is rotatably installed inside the first driving block 3, and the second valve stem 201 is fixedly connected to the bottom of the second driving block 301. Under the action of the first driving block 3 and the second driving block 301, the first valve stem 2 and the second valve stem 201 move stably, coaxially and synchronously, ensuring that the opening and closing actions are precise and consistent.

[0022] In one embodiment of the present invention, the limit drive block 202 is located between the two rotating blocks 4 to realize flexible switching between opening and closing, reducing jamming. The two rotating blocks 4 are connected by a buffer spring to provide buffer space for subsequent unidirectional transmission. The constant force springs 403 set on the side walls of the two rotating blocks 4 rotate in opposite directions, corresponding to the opening and closing actions of the valve body 1 respectively, to realize constant force and uniform speed power output, avoiding impact and seal damage caused by unstable rotation by hand.

[0023] As one embodiment of the present invention, both ends of the limiting drive block 202 are designed with bevels to achieve smooth insertion and disengagement between the limiting drive block 202 and the limiting groove 401 on the surface of the rotating block 4. No precise alignment is required during switching, reducing the difficulty of operation and improving the smoothness of operation. The one-way toothed ring 302 and the mating toothed ring 402 mesh in one direction to accurately realize one-way transmission and avoid motion interference.

[0024] In one embodiment of the present invention, the compensation component includes a fixed block 8 fixed inside the sealing block 6 and a rotating disk 7 rotatably installed inside the sealing block 6. A plurality of movable rods 801 are slidably installed on the surface of the fixed block 8, movable blocks 802 are fixed on the surface of the movable rods 801, and a pressing block 803 is fixed at the end of the movable rods 801. A plurality of rotating grooves 701 are opened on the surface of the rotating disk 7, and a movable groove 601 is also opened on the surface of the sealing block 6. When the sealing block 6 is worn and a slight leakage occurs, the action is automatically triggered to drive the multiple sets of movable rods 801 to move radially outward in sync, so that the pressing block 803 evenly supports the sealing block 6, and the sealing surface automatically expands and tightly adheres to the inner wall of the valve body 1, thereby compensating for the wear gap from the root and preventing leakage.

[0025] In one embodiment of the present invention, the guide block 501 is located on the inner wall of the guide groove 203. The guide groove 203 is designed in a spiral shape, which converts the axial displacement into a smooth rotational motion, so that the adjusting plate 5 rotates automatically when it moves up and down, thereby driving the subsequent compensation components to move.

[0026] In one embodiment of the present invention, the telescopic connecting rod 502 passes through the movable groove 601 and is fixedly connected to the rotating disk 7. The movable groove 601 provides the telescopic connecting rod 502 with a space for movement, adapts to the rotational movement of the adjusting disk 5, avoids jamming, and the telescopic connecting rod 502 can flexibly adapt to the changes in the distance between the adjusting disk 5 and the rotating disk 7.

[0027] As one embodiment of the present invention, the displacement rotation groove 701 of the moving block 802 is inclined, which directly converts the rotational motion of the rotating disk 7 into the linear motion of the moving rod 801. The rotation groove 701 pushes multiple sets of moving blocks 802 to move outward synchronously, ensuring that the tightening force of the pressing block 803 on the sealing block 6 is uniform.

[0028] As one embodiment of the present invention, the pressure block 803 is closely attached to the inner wall of the sealing block 6, so that the compensation force acts directly, evenly and without loss on the sealing part, achieving rapid expansion and immediate sealing, and the sealing block 6 is subjected to uniform force and is not easily deformed.

[0029] Working principle: When using this cylinder valve for vacuum and high pressure, to open valve body 1, first press down the rotating wheel 101. The rotating wheel 101 drives the limiting drive block 202 downward through the first valve rod 2. With the help of the inclined side wall of the limiting drive block 202, it smoothly enters the limiting groove 401 on the surface of the rotating block 4 below. Continue to press down the rotating wheel 101, and the limiting drive block 202 presses against the inner wall of the limiting groove 401, pushing the rotating block 4 to gradually move downward and approach the second drive block 301, so that the mating toothed ring 402 and the one-way toothed ring 302 mesh. Then, rotate the rotating wheel 101 forward, and the first valve rod 2 rotates accordingly, driving the rotating block 4 to rotate synchronously forward through the limiting drive block 202. Since the mating toothed ring 402 and the one-way toothed ring 302 have a one-way meshing structure, the rotating block 4 rotates forward. When in motion, the buffer spring is compressed, and the gear ring 402 and the second drive block 301 move away from each other, making it impossible to effectively mesh with the one-way gear ring 302. The second drive block 301 remains stationary. While the rotating block 4 rotates, it pulls the constant force spring 403, causing the constant force spring 403 to undergo elastic deformation and store stable power. After the rotating wheel 101 rotates to its position and is released, the constant force spring 403 smoothly releases energy with a constant torque, driving the rotating block 4 to rotate in the opposite direction. At this time, the gear ring 402 and the one-way gear ring 302 effectively mesh, driving the second drive block 301 to rotate, causing the second valve stem 201 to move downward, and simultaneously driving the adjusting plate 5 and the sealing block 6 to move downward, completing the stable sealing of the pipeline channel, effectively eliminating problems such as uneven speed and excessive impact caused by manual operation, and improving operational stability and control accuracy. Similarly, when it is necessary to close the valve body 1, pull the rotating wheel 101 upward. The rotating wheel 101 drives the limiting drive block 202 to move upward synchronously through the first valve rod 2, so that it enters the limiting groove 401 opened on the surface of the rotating block 4 located above. Continue to pull the rotating wheel 101 upward, and the limiting drive block 202 presses against the inner wall of the limiting groove 401, pushing the rotating block 4 to move upward and close to the first drive block 3, so that the mating toothed ring 402 and the one-way toothed ring 302 complete the engagement. Power is output through the constant force spring 403 in the opposite direction of opening, so as to achieve the smooth closing of the valve body 1. With prolonged use of the valve body 1, the surface of the sealing block 6 wears down due to friction and media erosion, resulting in decreased sealing performance and a small amount of gas leakage. The leaked gas first enters the gap between the regulating disc 5 and the sealing block 6. As the leakage increases, the gas pressure pushes the regulating disc 5 upward. Because the guide groove 203 has a threaded design and the guide block 501 on the inner wall of the regulating disc 5 is located within the guide groove 203, the regulating disc 5 rotates as it moves upward. The telescopic connecting rod 502 fixed to the side wall of the regulating disc 5 rotates synchronously. Through the fixed connection between the regulating disc 5 and the rotating disc 7, the rotating disc 7 is driven to start rotating. Because the rotating groove 701 is inclined and the moving block 802 is located in the rotating groove 701, and the moving rod 801 is limited and slidably installed in the fixed block 8, the rotation of the rotating disk 7 will drive multiple sets of moving rods 801 to move radially, causing the pressing block 803 to squeeze the inner wall of the sealing block 6, causing the sealing block 6 to expand radially and stick tightly to the inner wall of the valve body 1, realizing adaptive sealing compensation. When the sealing block 6 shows signs of wear, aging or other failures, the compensation mechanism is automatically activated to ensure the sealing surface fit effect, suppress leakage, improve the sealing reliability and safety of the valve body 1, extend the overall service life and reduce maintenance costs.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A cylinder valve for vacuum and high pressure applications, comprising a valve body (1) and a rotor (101), characterized in that: A first valve stem (2) is rotatably installed inside the valve body (1). A rotating wheel (101) is fixed at the top of the first valve stem (2). A driving component is provided at the bottom of the first valve stem (2). A second valve stem (201) is rotatably installed inside the valve body (1). A guide groove (203) is provided on the surface of the second valve stem (201). An adjusting plate (5) is rotatably installed at the end of the second valve stem (201). A guide block (501) is fixed on the inner wall of the adjusting plate (5). A telescopic connecting rod (502) is fixed on the side wall of the adjusting plate (5). A sealing block (6) is fixed at the end of the second valve stem (201). A compensation component is provided inside the sealing block (6). The drive assembly includes a first drive block (3) and a second drive block (301) threadedly installed in the valve body (1). The surfaces of the first drive block (3) and the second drive block (301) are both fixed with one-way toothed rings (302). It also includes a limiting drive block (202) fixed at the end of the first valve stem (2). It also includes two rotating blocks (4) elastically slidably installed in the valve body (1). The rotating blocks (4) have a limiting groove (401) on their surfaces. The rotating blocks (4) have a mating toothed ring (402) fixed on their surfaces. The rotating blocks (4) have a constant force spring (403) on their sidewalls.

2. A cylinder valve for vacuum and high pressure as described in claim 1, characterized in that: The first drive block (3) is fixedly connected to the second drive block (301). The first valve stem (2) is rotatably installed inside the first drive block (3), and the second valve stem (201) is fixedly connected to the bottom of the second drive block (301).

3. A cylinder valve for vacuum and high pressure as described in claim 1, characterized in that: The limiting drive block (202) is located between two rotating blocks (4), and the two rotating blocks (4) are connected by a buffer spring. The constant force springs (403) provided on the side walls of the two rotating blocks (4) rotate in opposite directions.

4. A cylinder valve for vacuum and high pressure as described in claim 1, characterized in that: The limiting drive block (202) has beveled ends, and the one-way toothed ring (302) meshes with the mating toothed ring (402) in one direction.

5. A cylinder valve for vacuum and high pressure as described in claim 1, characterized in that: The compensation component includes a fixed block (8) fixed inside the sealing block (6) and a rotating disk (7) rotatably installed inside the sealing block (6). Multiple moving rods (801) are slidably installed on the surface of the fixed block (8). Moving blocks (802) are fixed on the surface of the moving rods (801). A pressing block (803) is fixed at the end of the moving rods (801). Multiple rotating grooves (701) are opened on the surface of the rotating disk (7). It also includes a moving groove (601) opened on the surface of the sealing block (6).

6. A cylinder valve for vacuum and high pressure as described in claim 1, characterized in that: The guide block (501) is located on the inner wall of the guide groove (203), which is spirally designed.

7. A cylinder valve for vacuum and high pressure as described in claim 5, characterized in that: The telescopic connecting rod (502) passes through the moving groove (601) and is fixedly connected to the rotating disk (7).

8. A cylinder valve for vacuum and high pressure as described in claim 5, characterized in that: The movable block (802) is located in the rotating groove (701), which is designed to be inclined.

9. A cylinder valve for vacuum and high pressure as described in claim 5, characterized in that: The pressure block (803) is in close contact with the inner wall of the sealing block (6).

Images