Fuel gas valve with fuel gas material type change-over switch

Abstract

The utility model discloses a gas valve with a gas material type change-over switch. The gas valve comprises a valve body and a valve element, wherein the change-over switch is arranged on the valve body; the change-over switch comprises a shell, wherein the shell is provided with an air inlet and an air outlet; an accommodating groove is formed in the shell; the accommodating groove is communicated with the air outlet and the air outlet; the control piece is arranged in the containing cavity, and the upper portion of the control piece is in seamless sliding connection with the inner wall of the upper portion of the containing groove; the control piece divides the containing groove into two cavities, and the two cavities communicate with the air inlet and the air outlet correspondingly. The thickness of the lower part of the control piece is smaller than the diameters of the air inlet and the air outlet; a vent hole is formed in the lower part of the control piece; the cross section of the vent hole is smaller than that of the air outlet and that of the air inlet; the air inlet is communicated with the air outlet through the air vent. According to the utility model, the switch for controlling the gas output is arranged, so that the gas input can be controlled according to different fuel weights, the stable work of gas equipment is ensured, and the application of different types of gases is realized.

Description

Technical Field

[0001] The utility model relates to the field of gas valve production, in particular to a gas valve with a gas material type switching switch. Background Art

[0002] When the gas valve is used on power equipment with negative pressure, it belongs to the category of negative pressure valve. When the gas equipment is working, its negative pressure can open the negative pressure valve to introduce positive pressure combustible gas into the valve body. The opening of the negative pressure valve changes with the change of negative pressure to continuously adjust the intake amount of combustible gas.

[0003] Currently, civil gas is usually liquefied petroleum gas and natural gas. When the output of the gas-using equipment remains unchanged, the demand for gas intake during the combustion of liquefied petroleum gas or natural gas is different. Therefore, if a gas valve with a fixed intake volume is used, it will make it impossible to switch the gas type, that is, a single gas type is matched with a single gas valve, which limits the use of the equipment. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the purpose of the utility model is to provide a gas valve with a gas type switching switch and a switch for gas output control, which can control the gas intake amount according to the use of different fuel weights, maintain the stable operation of gas-using equipment, and realize the applicability of different types of gas.

[0005] The purpose of the utility model is achieved through such technical solution:

[0006] A gas valve with a gas type switching switch comprises a valve body and a valve core installed in the valve body, wherein the valve body is provided with a switching switch; the switching switch comprises:

[0007] The housing is integrally connected with the valve body, and the housing is provided with an air inlet and an air outlet; the air inlet is communicated with the air outlet passage corresponding to the valve core; a receiving groove is provided in the housing; the receiving groove is communicated with the air outlet and the air outlet;

[0008] A control member is arranged in the accommodating cavity, and the upper part of the control member is seamlessly slidably connected to the upper inner wall of the accommodating groove; the control member divides the accommodating groove into two cavities, and the two cavities are respectively connected to the air inlet and the air outlet; the lower part of the control member is plate-shaped, and the thickness of the lower part of the control member is smaller than the diameter of the air inlet and the air outlet; the lower part of the control member is provided with an air vent, and the cross-section of the air vent is smaller than the cross-section of the air outlet and the air inlet; the air inlet is connected to the air outlet through the air vent.

[0009] Furthermore, the control element comprises:

[0010] The control head is arranged at the upper part of the receiving groove, and the side surface is seamlessly slidably connected with the inner wall of the receiving groove;

[0011] A control rod, which is arranged on the control head and extends outwardly from the receiving groove;

[0012] The control panel is connected to the lower part of the control head, dividing the accommodating groove into two cavities, which are respectively connected to the air inlet and the air outlet; the control panel is provided with an air vent; the lower end of the control panel is seamlessly slidably connected to the bottom of the accommodating groove.

[0013] Furthermore, the control head is cylindrical, and a first annular groove is provided on the cylindrical surface of the control head; the inner wall of the accommodating groove is provided with a second annular groove corresponding to the annular groove; an O-ring is provided in the first annular groove; and the O-ring is located in the annular tube space surrounded by the first annular groove and the second annular groove.

[0014] Furthermore, an annular notch groove is provided on the upper end surface of the control head; a wave spring is provided in the annular notch groove; a cover plate is also provided on the shell, and a through hole is provided on the cover plate for the control rod to extend out; the cover plate covers the annular notch; and the two ends of the wave spring are respectively against the bottom of the annular notch groove and the lower surface of the cover plate.

[0015] Furthermore, the lower part of the control head is in the shape of a cone with the tip pointing downward; and the area of ​​the inner wall of the accommodating groove facing the lower part of the control head is in the shape of a funnel matching the cone of the lower part of the control head.

[0016] Furthermore, the control member also includes a bottom plate; the bottom plate is in an inverted frustum; the taper of the bottom inner wall of the accommodating groove is the same as the taper of the bottom plate; the side surface of the bottom plate is seamlessly slidably connected to the inner wall of the bottom of the accommodating groove.

[0017] Furthermore, a sealing gasket is provided between the bottom plate and the bottom of the accommodating groove.

[0018] Furthermore, the control head is provided with a boss; the boss is provided with a fan-shaped notch that rotates around the axis of the accommodating groove; the perforated inner wall of the cover plate is provided with an ear plate that extends into the fan-shaped notch; the ear plate is located in the fan-shaped notch; when the control head rotates around the axis of the accommodating groove, the rotation is limited by the ear plate.

[0019] Furthermore, an annular protrusion is provided on the control head; and the cross section of the upper portion of the control head is a special-shaped structure.

[0020] Furthermore, the upper portion of the control head is a cuboid; and two adjacent side surfaces of the control head are rounded.

[0021] Due to the adoption of the above technical solution, the utility model has the following advantages:

[0022] 1. By integrating a switch for controlling the switching of the gas intake volume on the valve body, two functions are integrated into one component, the number of equipment parts is reduced, and a single gas valve is applicable to different types of fuels.

[0023] 2. The cross section of the connection between the air inlet and the air outlet is changed by rotating the control member, that is, the air intake is increased by simply connecting through the air vent hole to simply connecting through the lower side of the control member, thereby realizing the control of the air intake of different fuel types.

[0024] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings of the present utility model are as follows:

[0026] Figure 1 This is a front view structural schematic diagram of the gas valve with a gas type switching switch in Example 1.

[0027] Figure 2 for Figure 1 Schematic diagram of the top view structure.

[0028] Figure 3 for Figure 2 Enlarged structural diagram at A in the middle.

[0029] Figure 4 for Figure 2 Schematic diagram of the structure of the middle BB section.

[0030] Figure 5 for Figure 2 Schematic diagram of the structure at the CC section.

[0031] Figure 6 for Figure 5 Enlarged structural diagram at D in the middle.

[0032] Figure 7 This is a schematic cross-sectional structural diagram of the switching switch in Example 2.

[0033] In the figure: 1. valve body; 2. shell; 21. accommodating groove; 211. second annular groove; 22. air inlet; 23. air outlet; 31. control head; 311. first annular groove; 312. annular notch groove; 313. boss; 3131. fan-shaped notch; 32. control rod; 321. annular protrusion; 33. control plate; 331. vent; 34. bottom plate; 35. sealing gasket; 4. O-ring; 5. wave spring; 6. cover plate; 61. perforation; 62. ear plate. DETAILED DESCRIPTION

[0034] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0035] Embodiment 1:

[0036] like Figures 1 to 6 As shown, a gas valve with a gas type switching switch comprises a valve body 1 and a valve core installed in the valve body 1, wherein the valve body 1 is provided with a switching switch; the switching switch comprises:

[0037] The housing 2 is integrally connected with the valve body 1, and the housing 2 is provided with an air inlet 22 and an air outlet 23; the air inlet 22 is communicated with the air outlet passage corresponding to the valve core; the housing 2 is provided with a receiving groove 21; the receiving groove 21 is communicated with the air outlet 23 and the air outlet 23;

[0038] The control member is arranged in the accommodating cavity, and the upper part of the control member is seamlessly slidably connected to the upper inner wall of the accommodating groove 21; the control member divides the accommodating groove 21 into two cavities, and the two cavities are respectively connected to the air inlet 22 and the air outlet 23; the lower part of the control member is plate-shaped, and the thickness of the lower part of the control member is smaller than the diameter of the air inlet 22 and the air outlet 23; the lower part of the control member is provided with an air vent, and the cross-section of the air vent is smaller than the cross-section of the air outlet 23 and the air inlet 22; the air inlet 22 is connected with the air outlet 23 through the air vent 331.

[0039] By integrally setting a switch for controlling the switching of the gas intake amount on the valve body 1, two functions are integrated into one component, the number of equipment parts is reduced, and at the same time, a single gas valve is applicable to different types of fuel. By rotating the control member, the cross section of the connection between the air inlet 22 and the air outlet 23 is changed, that is, the air intake is increased by simply connecting through the vent hole to simply connecting through the lower side of the control member, so as to control the air intake of different types of fuel.

[0040] In this embodiment, the control element includes:

[0041] The control head 31 is disposed on the upper portion of the accommodating groove 21, and the side surface is seamlessly slidably connected with the inner wall of the accommodating groove 21;

[0042] A control rod 32 is disposed on the control head 31 and extends outward from the receiving groove 21;

[0043] The control board 33 is connected to the lower part of the control head 31, dividing the accommodating groove 21 into two cavities, which are respectively connected to the air inlet 22 and the air outlet 23; the control board 33 is provided with a vent hole; the lower end of the control board 33 is seamlessly slidably connected to the bottom of the accommodating groove 21.

[0044] The ventilation volume under a fuel state is achieved by setting a vent 331 on the control panel 33. By rotating the control panel 33 so that the panel surface of the control panel 33 is parallel to the air inlet 22 and the air outlet 23, the gas can pass through both sides of the control panel 33 without obstruction, thereby increasing the ventilation volume.

[0045] In this embodiment, the control head 31 is cylindrical, and a first annular groove 311 is provided on the cylindrical surface of the control head 31; the inner wall of the accommodating groove 21 is provided with a second annular groove 211 corresponding to the annular groove; an O-ring 4 is provided in the first annular groove 311; the O-ring 4 is located in the annular tube space surrounded by the first annular groove 311 and the second annular groove 211.

[0046] The O-ring 4 can increase the sealing performance.

[0047] In this embodiment, the upper end surface of the control head 31 is provided with an annular notch groove 312; a wave spring 5 is provided in the annular notch groove 312; a cover plate 6 is also provided on the shell 2, and a through hole 61 is provided on the cover plate 6 for the control rod 32 to extend outward; the cover plate 6 covers the annular notch; the two ends of the wave spring 5 are respectively against the bottom of the annular notch groove 312 and the lower surface of the cover plate 6.

[0048] The wave spring 5 can apply a downward force to the control head 31, so that the squeezing force between the bottom of the control plate 33 and the bottom of the accommodating groove 21 is increased, thereby ensuring the sliding sealing effect.

[0049] In this embodiment, the lower portion of the control head 31 is in a cone shape with the tip pointing downward; the inner wall of the accommodating groove 21 facing the lower portion of the control head 31 is in a funnel shape matching the cone shape of the lower portion of the control head 31 .

[0050] The control head 31 is in conical surface contact with the accommodating cavity, and combined with the extrusion force of the wave spring 5, a sealing surface with a larger area is formed.

[0051] In this embodiment, the control member also includes a bottom plate 34; the bottom plate 34 is in an inverted frustum; the taper of the bottom inner wall of the accommodating groove 21 is the same as the taper of the bottom plate 34; the side of the bottom plate 34 is seamlessly slidably connected to the inner wall of the bottom of the accommodating groove 21.

[0052] A truncated cone-shaped bottom plate 34 is provided to fit the bottom of the accommodating groove 21 , and the sealing performance is enhanced under the action of the wave spring 5 .

[0053] In this embodiment, a sealing gasket 35 is further disposed between the bottom plate 34 and the bottom of the receiving groove 21 .

[0054] The sealing gasket 35 further enhances the sealing performance.

[0055] In this embodiment, a boss 313 is provided on the control head 31; a fan-shaped notch 3131 that rotates around the axis of the accommodating groove 21 is provided on the boss 313; an ear plate 62 extending into the fan-shaped notch 3131 is provided on the inner wall of the through hole 61 of the cover plate 6; the ear plate 62 is located in the fan-shaped notch 3131; when the control head 31 rotates around the axis of the accommodating groove 21, the ear plate 62 limits the rotation.

[0056] The fan angle of the fan-shaped notch 3131 is the rotation angle of the control head 31, thereby limiting the rotation angle of the control plate 33, forming two fixed-angle rotation conditions at both ends of the fan-shaped notch 3131, which can directly correspond to the intake volume requirements of two different fuels and facilitate operation.

[0057] In this embodiment, the control head 31 is provided with an annular protrusion 321; the cross section of the upper part of the control head 31 is a special-shaped structure. The upper part of the control head 31 is a rectangular parallelepiped; the two adjacent side faces of the control head 31 are rounded.

[0058] Special-shaped structures can be twisted with a special tool to prevent others from adjusting them with conventional tools, which would prevent the gas-using equipment from obtaining the correct air intake.

[0059] The gas valve with a fuel type switching switch in this embodiment is used as follows: a special tool is used to cover the control rod 32, and the rotation angle of the control rod 32 is adjusted until the fan-shaped notch 3131 abuts against the ear plate 62 to achieve a control of the air intake amount; if the fuel type is changed, the control rod 32 is similarly twisted so that the other end of the fan-shaped notch 3131 abuts against the ear plate 62.

[0060] When the control lever 32 is turned at two angles, the control plate 33 rotates accordingly, and the accommodating groove 21 is completely divided into two cavities from the control plate 33, and the air inlet 22 and the air outlet 23 are connected only by the air vent, so that the air inlet 22 and the gas can flow into the air outlet 23 through both sides of the control plate 33, thereby increasing the cross-section of the entire gas flow.

[0061] Embodiment 2:

[0062] like Figure 7 As shown, the difference between this embodiment and embodiment 1 is that the control head 31 and the accommodating cavity adopt a step extrusion seal method, rather than a sealing ring and a conical surface, and the bottom surface of the control plate 33 directly contacts the bottom of the accommodating groove 21. The seal of this embodiment adopts a hard contact seal method, and the structure is simpler. The use of this embodiment is the same as that of embodiment 1.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A gas valve with a gas type switching switch, comprising a valve body and a valve core installed in the valve body, characterized in that: The valve body is provided with a switching switch; the switching switch comprises: The housing is integrally connected with the valve body, and the housing is provided with an air inlet and an air outlet; the air inlet is communicated with the air outlet passage corresponding to the valve core; a receiving groove is provided in the housing; the receiving groove is communicated with the air outlet and the air outlet; A control member is arranged in the accommodating cavity, and the upper part of the control member is seamlessly slidably connected to the upper inner wall of the accommodating groove; the control member divides the accommodating groove into two cavities, and the two cavities are respectively connected to the air inlet and the air outlet; the lower part of the control member is plate-shaped, and the thickness of the lower part of the control member is smaller than the diameter of the air inlet and the air outlet; the lower part of the control member is provided with an air vent, and the cross-section of the air vent is smaller than the cross-section of the air outlet and the air inlet; the air inlet is connected to the air outlet through the air vent.

2. The gas valve with a gas type switching switch according to claim 1 is characterized in that: The control element comprises: The control head is arranged at the upper part of the receiving groove, and the side surface is seamlessly slidably connected with the inner wall of the receiving groove; A control rod, which is arranged on the control head and extends outwardly from the receiving groove; The control panel is connected to the lower part of the control head, dividing the accommodating groove into two cavities, which are respectively connected to the air inlet and the air outlet; the control panel is provided with an air vent; the lower end of the control panel is seamlessly slidably connected to the bottom of the accommodating groove.

3. The gas valve with a gas type switching switch according to claim 2 is characterized in that: The control head is cylindrical, and a first annular groove is provided on the cylindrical surface of the control head; a second annular groove corresponding to the annular groove is provided on the inner wall of the accommodating groove; an O-ring is provided in the first annular groove; the O-ring is located in the annular tube space surrounded by the first annular groove and the second annular groove.

4. The gas valve with a gas type switching switch according to claim 2 is characterized in that: The upper end surface of the control head is provided with an annular notch groove; a wave spring is provided in the annular notch groove; a cover plate is also provided on the shell, and a through hole is provided on the cover plate for the control rod to extend out; the cover plate covers the annular notch; the two ends of the wave spring are respectively against the bottom of the annular notch groove and the lower surface of the cover plate.

5. The gas valve with a gas type switching switch according to claim 4 is characterized in that: The lower part of the control head is in the shape of a cone with the tip pointing downward; the area of ​​the inner wall of the accommodating groove facing the lower part of the control head is in the shape of a funnel matching the cone of the lower part of the control head.

6. The gas valve with a gas type switching switch according to claim 4 is characterized in that: The control member also includes a bottom plate; the bottom plate is in an inverted frustum; the taper of the bottom inner wall of the accommodating groove is the same as the taper of the bottom plate; the side surface of the bottom plate is seamlessly slidably connected to the inner wall of the bottom of the accommodating groove.

7. The gas valve with a gas type switching switch according to claim 6 is characterized in that: A sealing gasket is also provided between the bottom plate and the bottom of the accommodating groove.

8. The gas valve with a gas type switching switch according to claim 4 is characterized in that: The control head is provided with a boss; the boss is provided with a fan-shaped notch that rotates around the axis of the accommodating groove; the perforated inner wall of the cover plate is provided with an ear plate that extends into the fan-shaped notch; the ear plate is located in the fan-shaped notch; when the control head rotates around the axis of the accommodating groove, the ear plate limits the rotation.

9. The gas valve with a gas type switching switch according to claim 4, characterized in that: The control head is provided with an annular protrusion; the cross section of the upper portion of the control head is a special-shaped structure.

10. The gas valve with a gas type switching switch according to claim 9, characterized in that: The upper part of the control head is a cuboid; two adjacent side surfaces of the control head are rounded.

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