A gas delivery on / off control valve

Abstract

This utility model provides a gas delivery on / off control valve, which combines the characteristics of a stop valve core and a gate valve core, enabling adjustment of gas flow rate and easy operation unaffected by gas pressure. It includes a main valve body, an upper valve body, a valve core assembly, and an adjustment knob. The main valve body forms a valve cavity, with an inlet and an outlet on each side. The main valve body and the upper valve body are fixedly joined. The upper valve body includes a cover portion and a knob receiving portion. The cover portion is fixedly fitted onto the upper part of the valve cavity, and the knob receiving portion is integrally formed on top of the cover portion to accommodate and install the adjustment knob. The valve core assembly includes a valve core portion and a screw section. The valve core portion includes a large-diameter section and a small-diameter section, which are integrally formed from bottom to top.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to a gas transmission on / off control valve. Background Technology

[0002] Valves are widely used for on / off control of fluid transport, including liquids, gases, and gas-liquid and liquid-solid mixtures. Ball valves are often used to control liquid transport channels, while gate valves are often used to control gas transport channels. This is because gate valves are relatively easier to achieve high sealing performance and flexible opening and closing in high-pressure gas environments. However, conventional gate valves have weak gas flow control capabilities when performing opening and closing functions, and the valve core position is also prone to instability due to airflow impact. Utility Model Content

[0003] Based on the above-mentioned technical status, this utility model provides a gas delivery on / off control valve, which combines the characteristics of a stop valve core and a gate valve core, and can adjust the gas flow rate and is easy to control and is not affected by gas pressure.

[0004] The technical solution adopted by this utility model is as follows: A gas delivery on / off control valve includes a main valve body, an upper valve body, a valve core assembly, and an adjusting knob; the main valve body forms a valve cavity, with an air inlet and an air outlet on each of the left and right sides of the valve cavity; the main valve body and the upper valve body are fixedly connected, the upper valve body includes a cover part and a knob receiving part, the cover part is fixedly fitted on the upper part of the valve cavity, and the knob receiving part is integrally formed on the upper part of the cover part for accommodating and installing the adjusting knob; the valve core assembly includes a valve core part and a screw section, the valve core part includes a large diameter section and a small diameter section, and the large diameter section, small diameter section, and screw section are arranged from bottom to top. The upper part is integrally formed. The outer diameter of the large-diameter section is adapted to the inner diameter of the valve cavity of the main valve body, and a flow-through groove is formed on the outer circumference of the large-diameter section. A bellows is sleeved on the outer circumference of the small-diameter section. The upper part of the bellows is fixedly connected to the upper outer circumference of the small-diameter section, and the lower part of the bellows is fixedly connected to a locking nut. The inner diameter of the locking nut is slightly larger than the outer diameter of the small-diameter section of the valve core, and the outer diameter of the locking nut is adapted to the inner diameter of the valve cavity of the main valve body. The locking nut is fixedly installed at the opening of the valve cavity. The screw section extends upward through the upper valve body, and the adjusting knob is threadedly fitted onto the screw section.

[0005] Furthermore, the main valve body is welded and fixed to the lower part of the cover of the upper valve body; or, the main valve body and the lower part of the cover of the upper valve body are fixedly connected by flanges and bolts; or, the main valve body is threaded into the lower opening of the cover of the upper valve body.

[0006] Furthermore, the valve core is hollow to form a blind hole channel inside, and a balance hole communicating with the blind hole channel is opened on the small diameter section of the valve core. The balance hole is opened near the large diameter section and located below the locking nut.

[0007] Furthermore, the flow-through annular groove is a rectangular annular groove formed on the large-diameter section. When the valve core moves up and down, the overlapping area of ​​the flow-through annular groove with the air inlet and outlet can be adjusted. In addition, the distance between the lower edge of the flow-through annular groove and the bottom surface of the valve core is not less than the inner diameter of the air inlet and / or outlet, so that the area of ​​the large-diameter section without the flow-through annular groove can be used to completely block the air inlet and / or outlet.

[0008] Furthermore, the center lines of the air inlet and air outlet are aligned; or, the air inlet and air outlet are staggered vertically.

[0009] Furthermore, the outer peripheral surface of the adjustment knob forms a gear to mesh with the drive teeth of the motor.

[0010] The advantages of this invention are as follows: by moving the valve core assembly up and down, the overlapping area between the flow ring groove and the air inlet and outlet can be adjusted by misalignment, allowing for gradual adjustment of the gas flow rate from small to large, resulting in better flow control. The gas pressure controlled by the valve only acts on the large-diameter section of the valve core from the side, and has no effect on the up and down position of the valve core assembly. Because the position of the valve core assembly is more stable and unaffected by the gas pressure, the control is more precise. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the gas delivery on / off control valve of this utility model;

[0012] Figure 2 This is an exploded structural diagram of the gas delivery on / off control valve of this utility model;

[0013] Figure 3 This is a cross-sectional structural schematic diagram of the gas delivery on / off control valve of this utility model;

[0014] Figure 4 This is a cross-sectional schematic diagram of the valve core assembly;

[0015] In the diagram: 1. Main valve body, 2. Upper valve body, 3. Valve core assembly, 4. Adjustment knob, 2-1. Cover part, 2-2. Knob receiving part, 3-1. Valve core part, 3-2. Flow ring groove, 3-3. Balance hole, 3-4. Locking nut, 3-5. Bellows, 3-6. Screw section. Detailed Implementation

[0016] See appendix Figure 1-4 , Figure 1This is a schematic diagram of the overall structure of the gas delivery on / off control valve of this utility model. Figure 2 This is an exploded structural diagram of the gas delivery on / off control valve of this utility model. Figure 3 This is a cross-sectional structural diagram of the gas delivery on / off control valve of this utility model. Figure 4 This is a cross-sectional schematic diagram of the valve core assembly; the gas delivery on / off control valve of this utility model, the main valve body 1 adopts a common valve body structure, with an air inlet and an air outlet on each of the left and right sides of the valve shell forming the valve cavity, the valve cavity is a cylindrical cavity, and the upper valve body 2 is fixedly connected to the top of the main valve body 1, see appendix. Figure 2 The upper valve body 2 includes a cover portion 2-1 and a knob receiving portion 2-2. The cover portion 2-1 is threaded or welded to the main valve body 1, or alternatively, a flange with bolts can be used for fixing. The internal space formed by the main valve body 1 and the upper valve body 2 is used to accommodate the valve core assembly 3. See also Figure 3 and Figure 4 The bottommost part of the valve core assembly 3 is configured as a valve core portion 3-1. The valve core portion 3-1 is hollow to form a blind hole channel. The valve core portion 3-1 includes a large diameter section and a small diameter section located above the large diameter section. The outer diameter of the large diameter section is adapted to the inner diameter of the valve cavity of the main valve body 1. A flow-through annular groove 3-2 is formed on the outer periphery of the large diameter section. When the position of the flow-through annular groove 3-2 corresponds to the air inlet and outlet, the airflow can pass through the flow-through annular groove 3-2 to connect the air inlet and outlet. Figure 3 In the illustrated embodiment, the centerlines of the air inlet and outlet coincide and have the same diameter. Alternatively, the air inlet and outlet can be staggered vertically and connected via the flow-through annular groove 3-2 to achieve better flow control. The distance between the lower edge of the flow-through annular groove 3-2 and the bottom surface of the valve core 3-1 is not less than the inner diameter of the channel of the air inlet and / or outlet. This allows the air inlet and / or outlet to be completely blocked by the section of the valve core's large-diameter segment located in the flow-through annular groove 3-2 when the valve core 3-1 is moved upwards, thus achieving complete airflow cutoff.

[0017] See Figure 4A bellows 3-5 is provided on the outer periphery of the small-diameter section of the valve core 3-1. The upper part of the bellows 3-5 is fixedly connected to the outer circumference of the small-diameter section, and the lower part of the bellows 3-5 is fixedly connected to a locking nut 3-4. The inner diameter of the locking nut 3-4 is slightly larger than the outer diameter of the small-diameter section of the valve core 3-1, and the outer diameter of the locking nut 3-4 is adapted to the inner diameter of the valve cavity of the main valve body 1. The locking nut 3-4 is fixedly installed at the valve cavity opening of the main valve body 1 by means of thread fixing, welding, or flange bolt fixing. A balance hole 3-3 is also provided on the small-diameter section below the locking nut 3-4. The balance hole 3-3 communicates with the blind hole channel, so that when the valve core moves up and down, the gas below the valve core and the gas between the valve core and the main valve body 1 can flow, avoiding the gas pressure affecting the operation of the valve core assembly. Above the valve core 3-1 is a screw section 3-6. At least a portion of the screw section 3-6 is provided with external threads. It passes through the knob receiving part 2-2 of the upper valve body 2 and is positioned above the upper valve body 2. The adjusting knob 4 is threadedly fitted onto the screw section 3-6, and the adjusting knob 4 is installed in the knob receiving part 2-2 with restricted vertical movement.

[0018] The working principle of the control valve of this utility model is as follows: By turning the adjusting knob 4 through the side opening of the knob receiving part 2-2, the valve core assembly 3 is driven up and down by the threaded drive (a guide pin groove is provided between the screw section and the upper valve body or between the valve core and the main valve body to restrict the rotation of the valve core assembly, or the bellows and locking nut can be used for restriction). The overlapping area of ​​the flow ring groove 3-2 on the outer periphery of the valve core 3-1 and the air inlet is adjusted. When the overlapping area is at its maximum, i.e. Figure 3 As shown, the control valve of this utility model reaches the maximum flow state. The valve core assembly 3 moves up and down, which can slowly adjust the overlapping area from zero to the maximum, thereby realizing the adjustment of gas flow. The position of the valve core assembly is not directly affected by the pressure of the flowing gas, and the position is more stable, avoiding the influence of slight fluctuations in the position of the valve core assembly on the flow control effect.

[0019] The control valve of this invention can be used for precise control of gas flow, such as in applications requiring high flow control, like the pneumatic deployment of a satellite antenna. In the embodiment, the valve core assembly 3 is manually moved up and down using an adjusting knob 4. Clearly, by utilizing the gear meshing of a micro-motor with the gears on the outer circumference of the adjusting knob 4, fully automatic electric control can be easily achieved. Furthermore, the control valve of this invention can also be used for liquid flow control, similarly achieving precise flow regulation.

Claims

1. A gas delivery on-off control valve characterized by, The system includes a main valve body, an upper valve body, a valve core assembly, and an adjusting knob. The main valve body forms a valve cavity, with an air inlet and an air outlet on each of its left and right sides. The main valve body and the upper valve body are fixedly joined. The upper valve body includes a cover portion and a knob receiving portion. The cover portion is fixedly fitted onto the upper part of the valve cavity, and the knob receiving portion is integrally formed on top of the cover portion to accommodate and install the adjusting knob. The valve core assembly includes a valve core portion and a screw section. The valve core portion includes a large-diameter section and a small-diameter section. The large-diameter section, the small-diameter section, and the screw section are integrally formed from bottom to top. The valve core has a large diameter section that matches the inner diameter of the valve cavity of the main valve body. A flow-through groove is formed on the outer circumference of the large diameter section. A bellows is fitted around the outer circumference of the small diameter section. The upper part of the bellows is fixedly connected to the upper outer circumference of the small diameter section. A locking nut is fixedly connected to the lower part of the bellows. The inner diameter of the locking nut is slightly larger than the outer diameter of the small diameter section of the valve core. The outer diameter of the locking nut matches the inner diameter of the valve cavity of the main valve body. The locking nut is fixedly installed at the opening of the valve cavity. The screw section extends upward through the upper valve body, and the adjusting knob is threadedly fitted onto the screw section.

2. The gas delivery on-off control valve of claim 1, wherein, The main valve body is welded and fixed to the lower part of the cover of the upper valve body; or, the main valve body and the lower part of the cover of the upper valve body are fixedly connected by flange and bolts; or, the main valve body is screwed into the lower opening of the cover of the upper valve body.

3. The gas delivery on-off control valve of claim 1, wherein, The valve core is hollow to form a blind hole channel inside. A balance hole communicating with the blind hole channel is opened on the small diameter section of the valve core. The balance hole is opened near the large diameter section and located below the locking nut.

4. The gas delivery on-off control valve of claim 1, wherein, The flow-through annular groove is an annular groove with a rectangular cross-section, opened on the large-diameter section.

5. The gas delivery on-off control valve of claim 4, wherein, The distance between the lower edge of the flow ring groove and the bottom surface of the valve core is not less than the inner diameter of the inlet and / or outlet.

6. The gas delivery on-off control valve of claim 1, wherein, The air inlet and air outlet are arranged with their center lines coinciding; or, the air inlet and air outlet are arranged with their vertical positions offset.

7. The gas delivery on-off control valve of claim 1, wherein, The outer circumference of the adjustment knob forms a gear to mesh with the drive gear of the motor.

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