Gas valve

Abstract

The invention discloses a gas valve which comprises an air door seat, an adjusting rod, an air door plate and a spring. The air door seat is provided with an air vent and limiting parts located on the two sides, the air door plate comprises a plate surface component and a supporting column, the two sides of the plate surface component are in sliding fit with the limiting parts of the air door seat, and at least part of the plate surface component is attached to the air door seat so as to axially move and adjust the opening degree of the air vent; the adjusting rod is provided with a threaded section, the threaded section is in threaded fit with the threaded hole portion of the valve seat, the lower end of the adjusting rod can abut against the upper end of the supporting column, one end of the spring abuts against the lower end of the supporting column directly or indirectly, and the other end of the spring abuts against an end cover of the valve seat directly or indirectly. According to the pressure regulating device, outlet pressure fluctuation caused during regulation is reduced, repeated regulation is not needed, installation is convenient and fast, and the installation efficiency can be remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas control, and in particular to a gas valve. Background Art

[0002] The gas and air ratio pressure regulating device of the full premixed gas controlled gas proportion valve is mainly composed of a door panel and an adjusting screw. The door panel is formed by metal stamping, and the door panel and the adjusting screw are a snap-fit ​​structure. When the adjusting screw moves up and down, it drives the door panel to rotate at a certain angle, thereby controlling the size of the flow volume of the door panel opening, indirectly controlling the size of the valve body outlet pressure, and finally realizing the adjustment of the valve body gas output pressure.

[0003] Since the door panels are stamped from metal in one piece, the processing technology is complex and consistency is not easy to ensure. The installation requires high operator skills and takes a lot of time. In addition, the door panels are stamped from metal, and the material is ductile and easily deformed during the adjustment process, which will cause fluctuations in the outlet pressure. Summary of the Invention

[0004] The purpose of the present invention is to provide a gas valve to solve the above technical problems.

[0005] To achieve the above-mentioned objectives, the present invention provides a gas valve, comprising a damper seat, an adjusting rod, a damper plate and a spring; the damper seat is provided with an air vent and limiting portions on both sides, the damper plate comprises a plate component and a support column, both sides of the plate component are slidably engaged with the limiting portions of the damper seat, and the plate component is at least partially engaged with the damper seat to adjust the opening of the vent by axial movement; the adjusting rod is provided with a threaded section, and the threaded section is threadedly engaged with the threaded hole portion of the valve seat, the lower end portion of the adjusting rod can be abutted against the upper end portion of the support column, one end of the spring is directly or indirectly abutted against the lower end portion of the support column, and the other end of the spring is directly or indirectly abutted against the end cover of the valve seat.

[0006] With the above-mentioned structure, the present invention indirectly controls the valve seat outlet pressure by adjusting the vertical axial movement of the regulating rod, ultimately achieving regulation of the valve seat gas output pressure. This reduces outlet pressure fluctuations caused by adjustment. This eliminates the need to repeatedly adjust the position of the regulating rod relative to the valve seat to control the damper seat vent size, quickly adjusting to the desired outlet pressure and meeting the customer's need for rapid switching between different models. Furthermore, the damper seat and damper plate are simple to manufacture and have a stable structure, making installation more convenient and significantly improving installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A longitudinal cross-sectional schematic diagram of a gas valve provided by an embodiment of the present invention;

[0008] Figure 2 for Figure 1 A transverse cross-sectional schematic diagram of the valve seat shown in FIG;

[0009] Figure 3 It is a schematic diagram of the structure of the damper seat, damper plate, spring and adjustment rod;

[0010] Figure 4 for Figure 3 The structural diagram of the damper seat is shown in (inverted state);

[0011] Figure 5 for Figure 3 The structural diagram of the damper plate shown in FIG;

[0012] Figure 6 for Figure 3 A schematic diagram of the structure of the regulating rod shown in FIG;

[0013] Figure 7 for Figure 1 The structural diagram of the end cover shown in FIG;

[0014] Figure 8 for Figure 1 A schematic diagram of the structure of the sealing gasket shown in FIG;

[0015] Figure 9 The damper plate of the pressure regulating device is relative to Figure 1 Schematic diagram of longitudinal section after moving downward;

[0016] Figure 10 The damper plate of the pressure regulating device is relative to Figure 1 Schematic diagram of longitudinal section after moving upward;

[0017] Figure 11 It is a curve diagram of the pressure regulating effect of the pressure regulating device;

[0018] Figure 12 This is a structural diagram of the adjustment rod and the support column being connected via a clamp;

[0019] Figure 13 for Figure 12 Schematic diagram of the structure in which the support column is provided with a clamp;

[0020] Figure 14 for Figure 12 A schematic diagram of the structure of the regulating rod shown in FIG;

[0021] Figure 15 A schematic diagram of an asymmetric structure of the vent of the damper seat;

[0022] Figure 16 This is a schematic diagram showing that the air vent of the damper seat is stepped.

[0023] In the figure: 1. Valve seat 101. Threaded hole 102. Slot 2. Damper seat 201. First chute 202. Second chute 203. Vent 204. Reinforcement rib 205. First boss structure 206. Second boss structure 207. Error-proof trapezoidal structure 208. Sealing surface 3. Adjustment rod 301. I-shaped slot 302. Groove structure 303. Limiting boss 304. Threaded segment 305. Arc surface 306. Attachment column 4. Damper plate 401. Plate component 402. Support column 403. Boss column 404. Column 405. Clamp 5. Spring 6. Sealing gasket 601. Spring hole 602. Sealing surface 9. End cap 901. Boss DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] In this article, terms such as "upper, lower, inside, outside" are established based on the positional relationships shown in the drawings. Depending on the different drawings, the corresponding positional relationships may also change accordingly. Therefore, they cannot be understood as absolute limitations on the scope of protection; moreover, relational terms such as "first" and "second" are only used to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components.

[0026] Please refer to Figure 1 、 Figure 2 , Figure 1 A longitudinal cross-sectional schematic diagram of a gas valve provided by an embodiment of the present invention; Figure 2 for Figure 1 A transverse cross-sectional view of the valve seat is shown in FIG.

[0027] As shown in the figure, in a specific embodiment, the pressure regulating device provided by the present invention is arranged in front of the air outlet of the valve seat 1 of the full premixed gas controlled proportional valve, and is mainly assembled by components such as the damper seat 2, the adjusting rod 3, the damper plate 4 and the spring 5.

[0028] The damper seat 2 is pressed onto the valve seat 1 and is provided with a vent 203 for gas circulation. The vent 203 is symmetrical on the left and right or arranged in the middle to stabilize the air pressure. A first slide groove 201 and a second slide groove 202 with openings facing each other are provided on both sides of the damper seat 2. The damper plate 4 consists of a plate component 401 and a support column 402. The two sides of the plate component 401 are linearly slidably matched with the slide grooves of the damper seat 2. After the damper plate 4 is inserted into the first groove 201 and the second slide groove 202 of the damper seat 2, it can move up and down relative to the damper seat 2.

[0029] The plate member 401 is larger than the vent 203 and is attached to the opposite side of the damper seat 2. As the plate member 401 moves up and down, it can completely cover the vent 203, partially cover the vent 203, or completely expose the vent 203, thereby adjusting the opening of the vent 203 through linear movement.

[0030] A threaded section 304 is provided on the regulating rod 3 and is assembled in the threaded hole 101 corresponding to the valve seat 1 through the threaded section 304. The lower end of the regulating rod 3 abuts against the upper end of the support column 402, the upper end of the spring 5 is supported on the lower end of the support column 402, and the lower end of the spring 5 is supported on the end cover 9 of the valve seat 1. The regulating rod 3, the support column 402, and the spring 5 are located on the same vertical axis. The plate component 401 of the damper seat 2 and the damper plate 4 is located beside the regulating rod 3, the support column 402, and the spring 5. The plane where the damper seat 2 and the plate component 401 are located is roughly parallel and obliquely arranged. The plane where they are located is roughly distributed along the diagonal direction of the valve seat 1 and occupies the gas channel area corresponding to the diagonal.

[0031] By adjusting the linear movement of the regulating rod 3 up and down, the pressure at the gas outlet of the valve seat 1 can be indirectly controlled, and the pressure at the gas outlet of the valve seat 1 can be adjusted eventually.

[0032] Please continue to refer to Figures 3 to 6 , Figure 3 It is a schematic diagram of the structure of the damper seat, damper plate, spring and adjustment rod; Figure 4 for Figure 3 The structural diagram of the damper seat is shown in FIG; Figure 5 for Figure 3 The structural diagram of the damper plate shown in FIG; Figure 6 for Figure 3 Schematic diagram of the structure of the adjustment rod shown in.

[0033] As shown in the figure, the damper seat 2 can be formed by integral plastic injection molding. Two vents 203 are symmetrically provided on the damper seat 2, and a reinforcing rib 204 is formed between the two vents 203. The damper seat 2 is also provided with a first boss structure 205 and a second boss structure 206. The first boss structure 205 is roughly located in the extension line direction of the first slide groove 201, and the sum of the lengths of the two is equal to the length of the damper seat 2. Similarly, the second boss structure 206 is roughly located in the extension line direction of the second slide groove 202, and is symmetrical with the first boss structure 205 and the first slide groove 201. The damper seat 2 is assembled in the corresponding slot 102 of the valve seat 1 through the first boss structure 205 and the second boss structure 206, so as to position the damper seat 2.

[0034] In addition, symmetrical anti-error trapezoidal structures 207 are provided on the outer sides of both sides of the damper seat 2. By designing the anti-error trapezoidal structure 207, the damper seat 2 can be restricted to be installed into the valve seat 1 only in the correct posture and direction. When the damper seat 2 is installed in the wrong posture or direction, it cannot be installed in place, thereby preventing the damper seat 2 from being installed incorrectly during the assembly process.

[0035] The regulating rod 3 is formed by turning. Along the axial direction, the regulating rod 3 is provided with a groove structure 302, a limiting boss 303, a threaded section 304, and an arc surface 305, sequentially from top to bottom. The groove structure 302 is used to mount an O-ring. An annular limiting step is provided within the threaded hole 101 of the valve seat 1. The diameter of the limiting boss 303 is larger than the inner diameter of the annular limiting step. When the regulating rod 3 is screwed downward to the limit position, the limiting boss 303 contacts the limiting step of the threaded hole 101, thereby limiting further downward rotation of the regulating rod 3. The threaded section 304 cooperates with the threaded hole 101 of the valve seat 1, and the arc surface 305 contacts the upper end of the support column 402 of the damper plate 4, reducing contact wear with the support column 402 and making the adjustment more sensitive.

[0036] The damper plate 4 can also be made of one-piece plastic injection molding. The plate structure 401 of the damper plate 4 is T-shaped, with a first plate body parallel to the damper seat 2 and a second plate body perpendicular to the damper seat 2. The first plate body is attached to the damper seat 2, one end of the second plate body is connected to the first plate body, and the other end is connected to the support column 402. The lower end of the support column 402 is provided with a boss column 403. The diameter and length of the boss column 403 are both smaller than the support column 402, and a step is formed between the two. The upper end of the spring 5 is mounted on the boss column 403 and supported on the step formed by the boss column 403 and the support column 402.

[0037] Please refer to Figure 7 、 Figure 8 , Figure 7 for Figure 1 The structural diagram of the end cover shown in FIG; Figure 8 for Figure 1 Schematic diagram of the structure of the sealing gasket shown in.

[0038] As shown in the figure, the end cover 9 is generally in the shape of a rectangular flat plate, which is fixedly connected to the valve seat 1 by screws. In order to ensure the sealing between the end cover 9 and the valve seat 1, a sealing gasket 6 is provided between the end cover 9 and the valve seat 1. The shape of the sealing gasket 6 is similar to that of the end cover 9, and its inner surface is formed with a separation area corresponding to the inner cavity of the valve seat 1.

[0039] One end of the damper seat 2 is flat, forming a sealing surface 208, which fits with the sealing surface 602 of the sealing gasket 6 through the sealing ring 208, and is then pressed and sealed by the end cover 9 to prevent gas leakage.

[0040] End cap 9 is provided with a boss 901, and sealing gasket 6 is provided with a spring hole 601 corresponding to the lower end of spring 5. The lower end of spring 5 passes through spring hole 601 and engages with boss 901. Thus, the upper end of spring 5 is restrained by boss post 403, and the lower end of spring 5 is restrained by boss 901, thereby ensuring the axial position of spring 5 and enabling stable compression or release.

[0041] During assembly, first assemble the adjusting rod 3 into the threaded hole 101 of the valve seat 1 through the threaded section 304, and then assemble the damper seat 2 into the corresponding slot 102 of the valve seat 1 using the first boss structure 205 and the second boss structure 206, then assemble the plate surface 401 of the damper plate 4 into the first slide groove 201 and the second slide groove 202 of the damper seat 2, and then install one end of the spring 5 into the spring support column 403 of the damper plate 4, and then fit the sealing surface 602 of the sealing gasket 6 with the head sealing surface 208 of the damper seat 2, and at the same time pass the other end of the spring 5 through the spring hole 601 of the sealing gasket 6, and then match the boss end 901 of the end cover 9 with the spring 5 and fix the end cover 9 to the valve seat 1 with screws.

[0042] There are two situations: the adjusting rod 3 and the supporting column 402 may be in contact with each other in the initial stage, or there may be a small gap reserved therebetween.

[0043] Please refer to Figure 9 、 Figure 10 、 Figure 11 , Figure 9 The damper plate of the pressure regulating device is relative to Figure 1 Schematic diagram of longitudinal section after moving downward; Figure 10 The damper plate of the pressure regulating device is relative to Figure 1 Schematic diagram of longitudinal section after moving upward; Figure 11 This is a curve diagram of the pressure regulating effect of the pressure regulating device.

[0044] When a tool is used to rotate the adjusting rod 3 through the I-shaped slot 301 of the adjusting rod 3 and move it downward, the arc surface 305 of the adjusting rod 3 is connected with the end of the support column 402 of the damper plate 4, driving the damper plate 4 to move linearly downward, thereby controlling the opening of the vent 203 of the damper seat 2 to gradually increase. The adjustment process is as follows: Figure 1 Change to Figure 9 , thereby increasing the outlet pressure through the valve seat 2 outlet. Figure 11 When the adjusting rod 3 moves upward, due to the action of the spring 5, the support column 403 of the damper plate 4 is pushed upward, driving the damper plate 4 to move linearly upward, thereby controlling the opening of the vent 203 of the damper seat 2 to gradually decrease, and the adjustment process is from Figure 1 Change to Figure 10 , thereby reducing the outlet pressure through the valve seat 2 outlet. Figure 11It is reflected as the change from point a to point b.

[0045] In particular, when the adjusting rod 3 rotates the threaded section 304 to move linearly up and down, since the spring 5 supporting the damper plate 4 is always in a compressed state, it always gives the damper plate 4 an upward thrust, and the damper plate 4 then gives the adjusting rod 3 an upward thrust. Therefore, due to the action of the spring 5, the thread gap between the threaded section 304 of the adjusting rod 3 and the threaded hole 101 of the valve seat 1 is eliminated, so that the required outlet pressure can be quickly adjusted without repeatedly adjusting the position of the adjusting rod 3. Therefore, by the up and down linear movement of the adjusting rod 3, the damper plate 4 is pushed to move linearly up and down, and then the opening and closing movement of the vent 203 on the mating surface of the damper seat 2 is controlled, which can indirectly control the size of the flow rate of the valve seat 1 outlet, and finally realize the linear adjustment of the gas outlet pressure curve, thereby meeting the fast and stable switching of the power required by different models.

[0046] The above embodiments are only preferred solutions of the present invention and are not limited thereto. On this basis, targeted adjustments can be made according to actual needs to obtain different implementation methods.

[0047] like Figure 12 、 Figure 13 、 Figure 14 As shown, in other embodiments, the adjustment rod 3 and the support column 402 can also be connected via a clamp 405. Specifically, the support column 402 has a column 404 formed at the top. The column 404 has a smaller diameter than the support column 402, and a clamp 405 is integrally formed on its sidewall. The clamp 405 has a C-shaped bayonet facing the adjustment rod 3. The lower end of the adjustment rod 3 is formed with a clamping column 306 of further reduced diameter. The end of the clamping column 306 is provided with a limiting flange. The support column 402 is clamped to the clamping column 306 of the adjustment rod 3 via the clamp 405. When the adjustment rod 3 moves up and down, the damper plate 4 can move up and down with the adjustment rod 3.

[0048] Alternatively, in some other embodiments, the vent 203 of the damper seat 2 is D-shaped (see Figure 15 ), is an asymmetric structure. If the damper plate 4 moves downward at a uniform speed, the increase in its flow area will first gradually increase and then gradually decrease. Alternatively, the vent 203 of the damper seat 2 is stepped (see Figure 16 ), if the damper plate 4 moves downward at a uniform speed, its increase gradually increases downward, and so on.

[0049] Since there are many possible implementation methods, we will not give examples here one by one.

[0050] The above-mentioned pressure regulating device has at least the following advantages:

[0051] 1) Installation is more convenient and improves installation efficiency;

[0052] 2) Reduces outlet pressure fluctuations caused by adjustment. That is, there is no need to repeatedly adjust the position of the adjustment rod 3 relative to the valve seat 1 to control the size of the damper seat vent 203 and quickly adjust to the required outlet pressure, meeting the customer's needs for rapid switching between different models.

[0053] 3) The damper seat 2 and damper plate 4 are easy to process, which can ensure good consistency of parts and reduce the product defect rate caused by defective parts;

[0054] 4) The structure is stable. After multiple adjustments, the damper seat 2 and the damper plate 4 are not easily deformed, and the outlet pressure is always adjusted linearly.

[0055] The above describes the gas valve provided by the present invention in detail. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are merely intended to facilitate understanding of the core concepts of the present invention. It should be noted that those skilled in the art will be able to make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the claims.

Claims

1. A gas valve, characterized in that: The invention comprises a damper seat (2), an adjusting rod (3), a damper plate (4) and a spring (5); the damper seat (2) is provided with a vent (203) and limiting parts on both sides; the damper plate (4) comprises a plate component (401) and a support column (402); both sides of the plate component (401) are slidably matched with the limiting parts of the damper seat (2); the plate component (401) is at least partially fitted with the damper seat (2) to axially move and adjust the vent. The opening of the air port (203); the regulating rod (3) is provided with a threaded section (304), the threaded section (304) is threadedly matched with the threaded hole portion of the valve seat (1), the lower end of the regulating rod (3) can be against the upper end of the support column (402), one end of the spring (5) is directly or indirectly against the lower end of the support column (402), and the other end of the spring (5) is directly or indirectly against the end cover (9) of the valve seat (1).

2. The gas valve according to claim 1, characterized in that The plate component (401) is T-shaped, comprising a first plate body parallel to the damper seat (2) and a second plate body perpendicular to the damper seat, wherein the first plate body is attached to the damper seat (2), and one end of the second plate body is connected to the first plate body, and the other end is connected to the support column (402).

3. The gas valve according to claim 1, characterized in that The damper seat (2) is provided with a boss structure in the direction of the extension line of the slide groove, and is assembled into the corresponding slot (102) of the valve seat (1) through the boss structure.

4. The gas valve according to claim 1, characterized in that Both sides of the damper seat (2) are provided with an anti-error trapezoidal structure (207) located on the outer side.

5. The gas valve according to claim 1, characterized in that One end of the regulating rod (3) is provided with a groove structure (302) and a limiting boss (303), and a sealing ring is provided in the groove structure (302); the other end of the regulating rod (3) is provided with an arc surface (305) in contact with the upper end of the support column (402).

6. The gas valve according to claim 5, characterized in that The lower end of the support column (402) is provided with a boss column (403), and the upper end of the spring (5) is sleeved on the boss column (403).

7. The gas valve according to claim 6, characterized in that The end cover (9) is provided with a boss (901), and the lower end of the spring (5) is sleeved on the boss (901).

8. The gas valve according to claim 7, characterized in that A sealing gasket (6) is provided on the inner side of the end cover (9), and a sealing surface (208) at one end of the damper seat (2) is in contact with a sealing surface (602) of the sealing gasket (6) and is compressed and sealed by the end cover (9).

9. The gas valve according to claim 8, characterized in that The sealing gasket (6) is provided with a spring hole (601) corresponding to the lower end of the spring (5), and the end cover (9) is provided with a boss (901), and the lower end of the spring (5) passes through the spring hole (601) and cooperates with the boss (901).

10. The gas valve according to claim 1, characterized in that The vent (203) of the damper seat (2) is an asymmetrical structure, or the vent (203) of the damper seat (2) is stepped.

11. The gas valve according to claim 1, characterized in that The damper seat (2) and the damper plate (4) are respectively integrally injection-molded plastic parts.

12. The gas valve according to any one of claims 1 to 11, characterized in that The regulating rod (3) is connected to the supporting column (402) via a clamp (405).

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