Gas flow adjusting structure and gas proportional valve

Abstract

The utility model provides a fuel gas flow adjusting structure and a fuel gas proportional valve, and relates to the field of fuel gas valves, the fuel gas flow adjusting structure comprises a through channel arranged on a valve body, a first chamber and a second chamber which are respectively arranged above and below the channel and are communicated with the channel, and the side walls of the first chamber and the second chamber are respectively provided with an outlet and an inlet. An upper cover plate and a lower cover plate are respectively sealed at the upper end of the first chamber and the lower end of the second chamber; the top of the adjusting sleeve is fixed below the upper cover plate, the lower end of the adjusting sleeve abuts against the bottom wall of the first cavity, and at least one long hole extending in the vertical direction is formed in the side wall of the adjusting sleeve. The adjusting valve clack is movably arranged in the barrel body of the adjusting sleeve in the up-down direction, the side wall of the upper end of the adjusting valve clack extends outwards to form at least one protruding block, and the protruding blocks are arranged in the long holes in an up-down sliding mode; and the driving device is connected with the adjusting valve clack. The protruding block slides in the long hole, so that movement of the valve clack is limited by the inner wall of the long hole, shaking caused by the influence of fluid is avoided, and meanwhile the size of the valve is small.

Description

Technical Field

[0001] The utility model relates to the technical field of gas valves, in particular to a gas flow regulating structure and a gas proportional valve. Background Art

[0002] Gas proportional valve is the abbreviation of gas and air proportional control valve. It is mainly used in household and commercial gas burning appliances that use natural gas as fuel, such as gas heating water heaters, gas water heaters, gas heating boilers, etc. Gas proportional valves generally have safety cut-off function, flow regulation function and voltage regulation function.

[0003] The gas flow control part of the existing gas proportional valve on the market is similar to the flow control valve structure disclosed in Chinese patent CN10386776A. The valve flap is unstable when moving due to the influence of the fluid, and the valve flap shakes, which makes it difficult to control the flow regulation accuracy.

[0004] In addition, in Chinese patent CN201588960U, a throttle sleeve is provided to limit the movement of the valve flap, so as to avoid the aforementioned problem of the valve flap being prone to shaking. However, this implementation method will make it difficult for the valve flap to move because the throttle sleeve restricts the valve flap too much. Utility Model Content

[0005] In view of this, the embodiments of the utility model provide a gas flow regulating structure and a gas proportional valve, which aim to solve the problem that the gas flow control accuracy is difficult to control due to the easy shaking of the valve disc in the existing proportional valve, while avoiding the problem that the valve disc is difficult to move due to excessive restriction of the throttling sleeve on the valve disc in the prior art.

[0006] An embodiment of the utility model provides a gas flow regulating structure, comprising: a valve body, provided with a through channel, and a first chamber and a second chamber respectively arranged above and below the channel and connected with the channel; an outlet and an inlet are respectively arranged on the side wall of the first chamber and the side wall of the second chamber; an upper cover plate and a lower cover plate are respectively arranged at the upper end of the first chamber and the lower end of the second chamber; an adjusting sleeve, the top of which is fixed under the upper cover plate, the lower end of which abuts against the bottom wall of the first chamber, and the side wall of which is provided with at least one long hole extending in the up-down direction; an adjusting valve flap, which is movably arranged in the cylinder body of the adjusting sleeve in the up-down direction; at least one protrusion extends outward from the upper end side wall of the adjusting valve flap; the protrusion is slidably arranged in the long hole in the up-down direction; the adjusting valve flap and the channel together form a gas passage; and a driving device, connected to the adjusting valve flap, used to drive the adjusting valve flap to move in the up-down direction to change the size of the gas passage.

[0007] The utility model also provides a gas proportional valve, comprising the gas flow regulating structure as described above.

[0008] The technical solution provided by the embodiment of the utility model has the following beneficial effects: in the gas flow regulating structure of the utility model, the regulating valve disc is driven to move in the up-down direction by the driving device, and the gap between the outer wall of the regulating valve disc and the inner wall of the channel is used to form a gas passage, and the gas enters from the inlet, then enters the regulating sleeve through the gas passage, flows out through the long hole on the regulating sleeve, and then flows out from the outlet. Among them, the movement of the regulating valve disc is limited by the inner wall of the long hole by the sliding of the protrusion in the long hole, avoiding the influence of the fluid, and the gas flow accuracy is determined by the height of the up-down movement of the regulating valve disc, which is convenient for control; at the same time, the sliding of the protrusion in the long hole can reduce the resistance of the regulating valve disc when it moves compared with the sliding of the existing valve disc in the throttling sleeve; in addition, since the protrusion and the long hole are respectively arranged on the regulating valve disc and the regulating sleeve, the regulating valve disc and the regulating sleeve are better utilized, and the size of the gas flow regulating structure in the up-down direction shown in the figure will not be increased, so that the gas flow regulating structure can be developed in the direction of miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of an embodiment of a gas flow regulating structure provided by the utility model;

[0010] Figure 2 yes Figure 1 Schematic diagram of transverse section in;

[0011] Figure 3 yes Figure 1 Schematic diagram of a top view of a regulating valve disc.

[0012] In the figure: 100, gas flow regulating structure; 1, valve body; 11, channel; 12, first chamber; 13, second chamber; 14, outlet; 2, regulating valve seat; 21, through hole; 211, vertical section; 212, inclined section; 22, annular groove; 3, adjusting sleeve; 31, top plate; 32, cylinder; 33, long hole; 4, regulating valve disc; 41, bump; 42, threaded hole; 5, driving device; 51, adjusting screw; 52, driving motor; 6, upper cover plate; 7, lower cover plate; 8, sealing ring; 9, rubber sealing ring. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the utility model clearer, the implementation mode of the utility model will be further described below in conjunction with the accompanying drawings.

[0014] Please refer to Figure 1-Figure 3As shown, a gas flow regulating structure 100 provided in an embodiment of the utility model includes a valve body 1, a regulating sleeve 3, a regulating valve flap 4 and a driving device 5. The valve body 1 is provided with a channel 11, and a first chamber 12 and a second chamber 13 which are arranged above and below the channel 11 and communicated with the channel 11, an outlet 14 is arranged on the side wall of the first chamber 12; an inlet is arranged on the side wall of the second chamber 13; the upper end of the first chamber 12 and the lower end of the second chamber 13 are sealed with an upper cover plate 6 and a lower cover plate 7 respectively; the top of the adjusting sleeve 3 is fixed below the upper cover plate 4, the lower end abuts against the bottom wall of the first chamber 12, and at least one long hole 33 extending in the vertical direction is arranged on the side wall; the adjusting valve flap 4 is arranged in the cylinder 32 of the adjusting sleeve 3 in a vertical direction, and the upper end side wall of the adjusting valve flap 4 is extended outwardly to be provided with at least one protrusion 41, and the protrusion 41 is slidably arranged in the long hole 33, and the adjusting valve flap 4 and the channel 11 together form a gas passage; and the driving device 5 is connected to the adjusting valve flap 4, and is used to drive the adjusting valve flap 4 to move in the vertical direction to change the size of the gas passage.

[0015] The regulating valve flap 4 is driven by the driving device 5 to move in the up-down direction, and a gas passage is formed by the gap between the outer wall of the regulating valve flap 4 and the inner wall of the channel 11. The gas enters the second chamber 13 from the inlet, and then enters the regulating sleeve 3 through the gas passage. After flowing out through the long hole 33 on the regulating sleeve 3, it enters the first chamber 12 and flows out from the outlet 14. Among them, the movement of the regulating valve flap 4 is limited by the inner wall of the long hole 33 by the sliding of the protrusion 41 in the long hole 33 to avoid being affected by the fluid. The accuracy of the gas flow is determined by the height of the regulating valve flap 4 moving in the up-down direction, which is convenient for control. At the same time, the regulating valve flap 4, the regulating sleeve 3, the valve body 1 and the driving device 5 are all independent structures connected to each other, which is convenient for installation and maintenance, and also convenient for later replacement of parts, and the maintenance cost is low. At the same time, since the projection 41 slides in the long hole 33 compared to the existing valve flap sliding in the throttling sleeve, the resistance encountered by the regulating valve flap 4 when moving can be reduced; in addition, since the projection 41 and the long hole 33 are respectively arranged on the regulating valve flap 4 and the regulating sleeve 3, the regulating valve flap 4 and the regulating sleeve 3 are better utilized, and the size of the gas flow regulating structure in the upper and lower directions shown in the figure will not be increased, which can make the gas flow regulating structure develop in the direction of miniaturization.

[0016] In other examples, the first chamber 12 may be provided with an inlet on its side wall, and the second chamber 13 may be provided with an outlet 14 on its side wall.

[0017] Furthermore, a plurality of protrusions 41 extend outwardly from the upper side wall of the regulating valve flap 4 ; the number of the long holes 33 is plural; and the plurality of protrusions 41 correspond to the plurality of long holes 33 one by one.

[0018] By providing a plurality of protrusions 41 correspondingly and slidably disposed in a plurality of long holes 33, the long holes 33 can not only play the role of limiting guide, so that the up and down movement of the regulating valve flap 4 is more stable, but also play the role of gas outlet, so that the gas passing through the regulating valve flap 4 flows out more evenly to the outlet 14 of the valve body 1.

[0019] Specifically, in one example, some sliding sealing structures can be provided between the protrusion 41 and the inner wall of the long hole 33, so that when the protrusion 41 slides in the long hole 33, the size of the long hole 33 is changed according to the sliding height of the protrusion 41, thereby adjusting the flow rate of the fluid.

[0020] Further, refer to Figure 2 As shown, the side wall of the cylinder 32 close to the outlet 14 is the front side, and the side wall of the cylinder 32 away from the outlet 14 is the back side. The number of the long holes 33 located on the front side is less than the number of the long holes 33 located on the back side.

[0021] After the gas flows out of the long hole 33, it will collide with the inner wall of the first cavity and then flow to the outlet 14 of the valve body 1. At this time, the long hole 33 near the outlet 14 of the valve body 1 is a relatively low-pressure area, and the long hole 33 far away from the outlet 14 of the valve body 1 is a relatively high-pressure area, and the farther away from the outlet 14 of the valve body 1, the higher the pressure. The same is true for the flow rate of the medium. Mediums with different flow rates will cause the regulating valve disc 4 to vibrate to a certain extent. Therefore, in the large-flow valve body 1, the layout of the long holes 33 on the regulating sleeve 3 is set so that the number of long holes 33 in the low-pressure area on the front side is less than the number of long holes 33 in the high-pressure area on the back side.

[0022] The side wall of the adjusting sleeve near the opening end of the first chamber is the front side, and the side wall of the adjusting sleeve far from the opening end of the first chamber is the back side. It should be noted that when the side wall of the first chamber 12 is provided with an inlet, and the side wall of the second chamber 13 is provided with an outlet 14, the side wall of the cylinder 32 near the inlet end is the front side, and the side wall of the cylinder 32 far from the inlet end is the back side, and the number of the long holes 33 located on the front side is less than the number of the long holes 33 located on the back side. This can also achieve the same effect as above.

[0023] Furthermore, refer to Figure 2 As shown, from the front side to the back side, the arc length between two adjacent long holes 33 gradually decreases.

[0024] Similarly, according to the characteristics of the high-pressure area and the low-pressure area, the width of the long hole 33 will be appropriately adjusted, and the width of the corresponding protrusion 41 will also change accordingly.

[0025] In a preferred embodiment, the arc length between two adjacent long holes 33 is gradually reduced in the direction from the outlet 14 to the end away from the outlet 14, so that the outlet 14 on the opposite side is arranged more densely, thereby adapting to the high-pressure area on the opposite side, thereby reducing the vibration of the regulating valve flap 4 and further improving the accuracy of gas flow regulation.

[0026] The width of the long hole gradually increases in a direction from the front surface to the back surface.

[0027] It should be noted that, in some examples, when adapting to the characteristics of the high-pressure area and the low-pressure area, the plurality of long holes 33 mentioned above may also be replaced by other openings that are only used for the flow of fluid.

[0028] Furthermore, it also includes a regulating valve seat 2, which is arranged between the bottom wall of the first chamber 12 and the cylinder 32, and a through hole connected to the channel 11 is provided in the middle of the regulating valve seat 2, and an annular groove 22 is recessed on the upper end surface of the regulating valve seat 2, and the lower end of the side wall of the cylinder 32 is inserted into the annular groove 22.

[0029] By providing the regulating valve seat 2 and inserting the side wall of the cylinder 32 into the annular groove 22 , it is helpful to further fix the regulating sleeve 3 and ensure the sealing between the regulating sleeve 3 and the first chamber 12 .

[0030] Specifically, in one embodiment, the outer diameter of the regulating valve flap 4 gradually increases from bottom to top, and the inner diameter of the through hole 21 includes a vertical section 211 and an inclined section 212, the vertical section 211 is arranged below the inclined section 212, and the inclination angle of the inclined section 212 is adapted to the outer side wall of the regulating valve flap 4.

[0031] The inner diameter of the through hole 21 is arranged from bottom to top as a vertical section 211 and an inclined section 212, which helps to gradually reduce the gas passage from bottom to top, and the inclination angle of the inclined section 212 is adapted to the outer wall of the regulating valve flap 4, which can further improve the accuracy above the gas passage and better control the gas flow under low flow conditions.

[0032] Specifically, a threaded hole 42 penetrating upward and downward is provided at the center of the regulating valve flap 4, and a through hole is provided in the middle of the upper end of the regulating sleeve 3; the driving device 5 includes an adjusting screw 51, and the adjusting screw 51 passes through the through hole and is threadedly connected to the threaded hole 42.

[0033] The adjusting screw 51 moves up and down, thereby driving the adjusting valve flap 4 to move up and down, thereby realizing the change in the size of the gas passage. When the adjusting valve flap 4 moves up, the area of ​​the gas passage increases, and the gas flow increases; when the adjusting valve flap 4 moves down, the area of ​​the gas passage decreases, and the gas flow decreases accordingly. In this embodiment, the flow regulation accuracy is controlled by the pitch of the adjusting screw 51 and the adjusting valve flap 4, and the height and taper of the adjusting valve flap 4 affect the flow regulation accuracy and the flow regulation range respectively. Here, the specific height and taper of the adjusting valve flap 4 are not limited, and their values ​​are different according to the size of the valve body 1.

[0034] The driving device 5 may include the driving motor 52 . The driving motor 52 is disposed on the upper cover plate 6 . The output shaft of the driving motor 52 is connected to the adjusting screw 51 .

[0035] This design separates the control mechanism from the driving components, which not only strengthens the airtightness safety of the entire gas proportional valve, but also effectively reduces the after-sales cost. The driving components such as the driving motor 52 can be replaced separately, or the flow control components can be replaced separately. In other examples, the driving motor 52 can be replaced by an electric push rod or a cylinder.

[0036] Furthermore, a sealing ring 8 is provided between the upper end of the adjusting screw 51 and the through hole, which can further ensure the airtightness of the first cavity, so that the gas will not flow out of the through hole.

[0037] Further, the adjusting sleeve 3 includes a top plate 31; the cylinder 32 is convexly arranged at the lower end of the top plate 31, and the top plate 31 is fixed below the upper cover plate 6; the long hole 33 is arranged on the side wall of the cylinder 32; the upper end surface of the valve body 1 is concavely arranged with an annular sealing groove, and a rubber sealing ring 9 is arranged in the sealing groove, and the top plate 31 abuts against the top of the rubber sealing ring 9. The rubber sealing ring 9 abuts against the bottom of the top plate 31, and an upper cover plate 6 is also arranged above the top plate 31, so as to increase the airtightness of the first chamber 12 and ensure that the gas only flows out from the outlet 14.

[0038] The utility model also provides a gas proportional valve, comprising the gas flow regulating structure 100 as described above.

[0039] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0040] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas flow regulating structure, characterized in that: include: The valve body is provided with a through passage, and a first chamber and a second chamber which are respectively arranged above and below the passage and communicated with the passage; an outlet and an inlet are respectively arranged on the side wall of the first chamber and the side wall of the second chamber; an upper cover plate and a lower cover plate are respectively arranged at the upper end of the first chamber and the lower end of the second chamber; An adjusting sleeve, the top of which is fixed below the upper cover plate, the lower end of which abuts against the bottom wall of the first chamber, and the side wall of which is provided with at least one long hole extending in the up-down direction; The regulating valve flap is movably arranged in the cylinder of the regulating sleeve in the up-down direction; at least one protrusion is extended outward from the upper side wall of the regulating valve flap; the protrusion is slidably arranged in the long hole up-down; the regulating valve flap and the channel jointly form a gas passage; as well as, The driving device is connected to the regulating valve flap and is used to drive the regulating valve flap to move in the up and down directions so as to change the size of the gas passage.

2. The gas flow regulating structure according to claim 1, characterized in that: The upper end side wall of the regulating valve disc extends outward with a plurality of protrusions; the number of the long holes is multiple; and the plurality of protrusions corresponds one to one with the plurality of long holes.

3. The gas flow regulating structure according to claim 1, characterized in that: The adjusting sleeve is provided with a plurality of long holes along its circumference; the side wall of the adjusting sleeve close to the opening end of the first chamber is the front side, and the side wall of the adjusting sleeve away from the opening end of the first chamber is the back side; the number of the long holes located on the front side is less than the number of the long holes located on the back side.

4. The gas flow regulating structure according to claim 3, characterized in that: In the direction from the front side to the back side, the arc length between two adjacent long holes gradually decreases; and / or, in the direction from the front side to the back side, the width of the long hole gradually increases.

5. The gas flow regulating structure according to claim 1, characterized in that: It also includes a regulating valve seat, which is arranged between the bottom wall of the first chamber and the cylinder, a through hole communicating with the channel is arranged in the middle of the regulating valve seat, an annular groove is arranged on the upper end surface of the regulating valve seat, and the lower end of the side wall of the cylinder is inserted into the annular groove; The inner diameter of the through hole includes a vertical section and an inclined section, the vertical section is arranged below the inclined section, and the inclination angle of the inclined section is matched with the outer side wall of the regulating valve flap.

6. The gas flow regulating structure according to claim 1, characterized in that: A threaded hole penetrating in an upward and downward direction is provided at the center of the regulating valve flap, and a through hole is provided in the middle of the upper end of the regulating sleeve; the driving device comprises an adjusting screw, and the adjusting screw passes through the through hole and is threadedly connected with the threaded hole.

7. The gas flow regulating structure according to claim 6, characterized in that: A sealing ring is provided between the upper end of the adjusting screw and the through hole.

8. The gas flow regulating structure according to claim 6, characterized in that: The driving device includes one of an electric push rod, a cylinder, and a driving motor. The electric push rod, the movable end of the cylinder, or the driving motor is arranged on the upper cover plate, and the output shaft of the electric push rod, the movable end of the cylinder, or the driving motor is connected to the adjusting screw.

9. The gas flow regulating structure according to claim 1, characterized in that: The adjusting sleeve comprises a top plate; the cylinder body is convexly arranged at the lower end of the top plate; the top plate is fixed below the upper cover plate; the long hole is arranged on the side wall of the cylinder body; the upper end surface of the valve body is concavely provided with an annular sealing groove, a rubber sealing ring is arranged in the sealing groove, and the top plate abuts against the top of the rubber sealing ring.

10. A gas proportional valve, characterized in that: It comprises a gas flow regulating structure as described in any one of claims 1 to 9.

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