Gas valve

Abstract

The utility model discloses a gas valve which comprises a valve body, a piezoelectric igniter, a percussion hammer, a gland and a percussion hammer driving mechanism. The valve body is provided with a mounting cavity, the mounting cavity is provided with an opening, the piezoelectric igniter is mounted in the mounting cavity and provided with a trigger end, the percussion hammer is movably arranged in the mounting cavity and can be close to and away from the trigger end of the piezoelectric igniter, and the gland is mounted on the valve body and covers the opening of the mounting cavity. The percussion hammer driving mechanism is used for driving the percussion hammer to move and impact the trigger end of the piezoelectric igniter. A first protruding strip and a second protruding strip are arranged on the face, close to the installation cavity, of the gland, the first protruding strip and the second protruding strip extend in the moving direction of the percussion hammer, the first protruding strip and the second protruding strip are arranged side by side in a spaced mode and define a guide groove, and one part of the percussion hammer is matched with the guide groove and contained in the guide groove. And the percussion hammer is in sliding fit with the first raised line and the second raised line. According to the gas valve with the structure, the ignition stability of the gas valve can be improved.

Description

Technical Field

[0001] This utility model relates to the field of gas, and in particular to a gas valve. Background Technology

[0002] Existing gas valves generally include a valve body, a piezoelectric igniter, a firing hammer, a pressure cap, and a firing hammer drive mechanism. The valve body has a mounting cavity with an opening. The piezoelectric igniter is mounted in the mounting cavity and has a trigger end. The firing hammer is movably mounted in the mounting cavity and can approach or move away from the trigger end of the piezoelectric igniter. The pressure cap is mounted on the valve body and seals the opening of the mounting cavity. The firing hammer drive mechanism is located in the valve body and is used to drive the firing hammer to move and strike the trigger end of the piezoelectric igniter. When the gas valve ignites, the firing hammer drive mechanism drives the firing hammer to move and strike the trigger end of the piezoelectric igniter. The piezoelectric igniter generates high voltage, which can then be used to generate a spark to ignite the gas. In actual use, the voltage generated when the piezoelectric igniter is activated by the firing hammer is not stable enough, and sometimes it even fails to ignite, resulting in insufficient ignition stability. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a gas valve that can improve the stability of gas valve ignition.

[0004] A gas valve according to an embodiment of the present invention includes: a valve body having an installation cavity with an opening; a piezoelectric igniter installed in the installation cavity with a trigger end; a firing hammer movably disposed in the installation cavity and capable of approaching and moving away from the trigger end of the piezoelectric igniter; a pressure cap installed in the valve body and sealing the opening of the installation cavity; and a firing hammer drive mechanism disposed in the valve body and linked with the firing hammer, the firing hammer drive mechanism being used to drive the firing hammer to move and strike the trigger end of the piezoelectric igniter; wherein, the pressure cap has a first protrusion and a second protrusion on its surface near the installation cavity, the first protrusion and the second protrusion extending along the moving direction of the firing hammer, the first protrusion and the second protrusion being arranged side by side at intervals and forming a guide groove, a portion of the firing hammer being adapted to and accommodated in the guide groove, and the firing hammer slidingly engaging with the first protrusion and the second protrusion.

[0005] A gas valve according to an embodiment of the present invention has at least the following beneficial effects: The gas valve, by providing a first and a second protrusion on the gland, with the first and second protrusions forming a guide groove, a portion of the firing hammer is housed in the guide groove and slides with the first and second protrusions, thereby guiding the movement of the firing hammer. This effectively ensures that the firing hammer stably impacts the trigger end of the piezoelectric igniter, resulting in a stable impact position and thus good ignition stability. Furthermore, by providing the first and second protrusions on the gland to guide the firing hammer, the valve body and firing hammer do not require modification, resulting in low modification costs, convenient modification, and easy upgrades to older products.

[0006] According to some embodiments of this utility model, the surface on which the first protrusion engages with the firing hammer is defined as a first contour surface, and the intersection line of the first contour surface and the plane perpendicular to the first protrusion is an arc; the surface on which the second protrusion engages with the firing hammer is defined as a second contour surface, and the intersection line of the second contour surface and the plane perpendicular to the second protrusion is an arc; the surface on which the firing hammer engages with the first protrusion and the second protrusion is an arc-shaped surface.

[0007] According to some embodiments of this utility model, the cover is a sheet metal body, and the first protrusion and the second protrusion are stamped ribs.

[0008] According to some embodiments of the present invention, the cover is a sheet metal body, and the cover has flanged portions on both sides.

[0009] According to some embodiments of the present invention, the firing hammer drive mechanism includes a main shaft assembly and an elastic element. The main shaft assembly is pivotally connected to the valve body. The main shaft assembly is provided with a toggle handle. The firing hammer is provided with a linkage engagement part. The linkage engagement part is located on the movement path of the toggle handle when it rotates with the main shaft assembly. The toggle handle is used to actuate the linkage engagement part to push the firing hammer away from the trigger end of the piezoelectric igniter. The elastic element is disposed between the firing hammer and the valve body. The elastic element is used to provide a reset force that causes the firing hammer to push against the trigger end.

[0010] According to some embodiments of the present invention, the elastic element is installed in the mounting cavity, the elastic element is cylindrical, the compression elongation direction of the elastic element is the axial direction of the cylindrical shape, the first convex strip and the second convex strip extend to a position opposite to the elastic element, a portion of the elastic element is adapted to and accommodated in the guide groove, and the elastic element slides in cooperation with the first convex strip and the second convex strip.

[0011] According to some embodiments of this utility model, the elastic element is a spring.

[0012] According to some embodiments of the present invention, the surface of the pressure cap near the mounting cavity is provided with a top pressure protrusion, the top pressure protrusion is opposite to the piezoelectric igniter and is used to press the piezoelectric igniter tightly against the mounting cavity.

[0013] According to some embodiments of the present invention, one end of the pressure cap is provided with a snap-fit ​​portion, the valve body is provided with a snap-fit ​​mating portion corresponding to the snap-fit ​​portion, the other end of the pressure cap is provided with a mounting hole, the valve body is provided with a screw hole corresponding to the mounting hole, the snap-fit ​​portion and the snap-fit ​​mating portion of the pressure cap are snap-fit ​​mated, the mounting hole and the screw hole are opposite to each other and a fixing screw is provided to press the other end of the pressure cap against the valve body.

[0014] According to some embodiments of the present invention, the mounting cavity is a strip-shaped cavity adapted to the firing hammer, and the firing hammer is slidably disposed in the mounting cavity.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0018] Figure 2 This is an exploded view of an embodiment of the present invention;

[0019] Figure 3 This is a three-dimensional schematic diagram of the pressure cap according to an embodiment of the present utility model;

[0020] Figure 4 for Figure 1 A cross-sectional view of the structure shown along the AA direction;

[0021] Figure 5 for Figure 4 Enlarged view of point C;

[0022] Figure 6 for Figure 1 A cross-sectional view of the structure along the BB direction.

[0023] Figure label:

[0024] Valve body 100, mounting cavity 110, snap-fit ​​mating part 120;

[0025] Piezoelectric igniter 200, trigger terminal 210;

[0026] 300 firing hammer, 310 linkage mechanism;

[0027] Pressure cap 400, first protrusion 410, second protrusion 420, guide groove 430, flange 440, top pressing protrusion 450, snap-fit ​​part 460, mounting hole 470;

[0028] 500, hammer drive mechanism, 510, spindle assembly, 520, elastic element, and 511, actuating handle;

[0029] Fixing screw 600. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0034] Reference Figures 1 to 6A gas valve includes: a valve body 100, a piezoelectric igniter 200, a firing hammer 300, a pressure cap 400, and a firing hammer drive mechanism 500. The valve body 100 has a mounting cavity 110 with an opening. The piezoelectric igniter 200 is mounted in the mounting cavity 110 and has a trigger end 210. The firing hammer 300 is movably disposed in the mounting cavity 110 and can approach and move away from the trigger end 210 of the piezoelectric igniter 200. The pressure cap 400 is mounted in the valve body 100 and seals the opening of the mounting cavity 110. The firing hammer drive mechanism 500 is disposed in the valve body 100 and works in conjunction with the firing hammer 300. The firing hammer drive mechanism 500 is used to drive the firing hammer 300 to move and strike the trigger end 210 of the piezoelectric igniter 200. The pressure cap 400 has a first protrusion 410 and a second protrusion 420 on the surface near the mounting cavity 110. The first protrusion 410 and the second protrusion 420 extend along the moving direction of the firing hammer 300. The first protrusion 410 and the second protrusion 420 are arranged side by side at intervals and surround to form a guide groove 430. A part of the firing hammer 300 is adapted to and accommodated in the guide groove 430. The firing hammer 300 slides in cooperation with the first protrusion 410 and the second protrusion 420.

[0035] The aforementioned gas valve, by providing a first protrusion 410 and a second protrusion 420 on the pressure cap 400, forms a guide groove 430 between the first protrusion 410 and the second protrusion 420. A portion of the firing hammer 300 is housed in the guide groove 430, and the firing hammer 300 slides in cooperation with the first protrusion 410 and the second protrusion 420. This guides the movement of the firing hammer 300, effectively ensuring that the firing hammer 300 stably impacts the trigger end 210 of the piezoelectric igniter 200. The impact position is stable, resulting in good ignition stability. Furthermore, by providing the first protrusion 410 and the second protrusion 420 on the pressure cap 400 to guide the firing hammer 300, the valve body 100 and the firing hammer 300 do not need to be modified, resulting in low modification costs, convenient modification, and easy upgrades for older products.

[0036] In this embodiment, the surface of the first protrusion 410 that mates with the firing hammer 300 is defined as the first contour surface, and the intersection line of the first contour surface and the plane perpendicular to the first protrusion 410 is an arc; the surface of the second protrusion 420 that mates with the firing hammer 300 is defined as the second contour surface, and the intersection line of the second contour surface and the plane perpendicular to the second protrusion 420 is an arc; the surfaces of the firing hammer 300 that mate with the first protrusion 410 and the second protrusion 420 are arc-shaped surfaces. With the above structure, the mating between the first protrusion 410, the second protrusion 420 and the firing hammer 300 is smooth, with good fit, and they are not easily scratched by each other. Of course, it is conceivable that the first protrusion 410 and the second protrusion 420 are not limited to the above-described shape and structure, and those skilled in the art can also reasonably configure their shape and structure according to actual conditions.

[0037] In this embodiment, the pressure cap 400 is a sheet metal body, and the first protrusion 410 and the second protrusion 420 are stamped ribs. Using the above structure, the manufacturing of the first protrusion 410 and the second protrusion 420 is simple and the production cost is low.

[0038] In this embodiment, flanges 440 are provided on both sides of the pressure cap 400, which can enhance the structural strength of the pressure cap 400.

[0039] It is conceivable that the cap 400 is not limited to the structure described above, and those skilled in the art can reasonably combine the structure of the cap 400 according to the actual situation.

[0040] In this embodiment, the hammer drive mechanism 500 includes a spindle assembly 510 and an elastic element 520. The spindle assembly 510 is pivotally connected to the valve body 100. The spindle assembly 510 is provided with a toggle handle 511. The hammer 300 is provided with a linkage engagement part 310. The linkage engagement part 310 is located on the movement path of the toggle handle 511 when it rotates with the spindle assembly 510. The toggle handle 511 is used to actuate the linkage engagement part 310 to push the hammer 300 away from the trigger end 210 of the piezoelectric igniter 200. The elastic element 520 is disposed between the hammer 300 and the valve body 100. The elastic element 520 is used to provide a reset force that causes the hammer 300 to push against the trigger end 210. During ignition, the spindle assembly 510 is rotated, and the firing hammer 300 is moved away from the trigger end 210 of the piezoelectric igniter 200 by the actuating handle 511. The firing hammer 300 compresses the elastic element 520, which stores elastic potential energy. When the spindle assembly 510 continues to rotate, causing the actuating handle 511 to disengage from the firing hammer 300, the elastic element 520 releases its elastic potential energy, pushing the firing hammer 300 to strike the trigger end 210 of the piezoelectric igniter 200, thus achieving ignition. The above ignition structure is simple and easy to implement.

[0041] It is conceivable that in other embodiments, the hammer drive mechanism 500 is not limited to the above-described implementation. In the art, there are many other implementations for driving the hammer 300 to move and strike the trigger end 210 of the piezoelectric igniter 200. Those skilled in the art can adopt existing hammer drive mechanisms 500 with other structures according to the actual situation.

[0042] In this embodiment, the elastic element 520 is installed in the mounting cavity 110. The elastic element 520 is cylindrical, and its compression and elongation direction is the axial direction of the cylinder. The first protrusion 410 and the second protrusion 420 extend to positions opposite to the elastic element 520. A portion of the elastic element 520 is adapted to and accommodated in the guide groove 430. The elastic element 520 slides in cooperation with the first protrusion 410 and the second protrusion 420. With the above structure, the first protrusion 410, the second protrusion 420, and the guide groove 430 they enclose can further cooperate with the elastic element 520, making the compression and elongation of the elastic element 520 more stable, thereby further improving the operational stability of the firing hammer 300.

[0043] In this embodiment, the elastic element 520 is a spring. It is conceivable that in some embodiments, the elastic element 520 is not limited to a spring, but may also be an elastic structure such as a sheet, a rubber body, etc.

[0044] In this embodiment, a pressing protrusion 450 is provided on the surface of the pressure cap 400 near the mounting cavity 110. The pressing protrusion 450 is opposite to the piezoelectric igniter 200 and is used to press the piezoelectric igniter 200 tightly against the mounting cavity 110. With the above structure, the pressing protrusion 450 can abut against the piezoelectric igniter 200, thereby making the installation of the piezoelectric igniter 200 stable and effectively ensuring positional stability when impacted.

[0045] In this embodiment, one end of the pressure cap 400 is provided with a snap-fit ​​portion 460, and the valve body 100 is provided with a snap-fit ​​mating portion 120 corresponding to the snap-fit ​​portion 460. The other end of the pressure cap 400 is provided with a mounting hole 470, and the valve body 100 is provided with a screw hole corresponding to the mounting hole 470. The snap-fit ​​portion 460 and the snap-fit ​​mating portion 120 of the pressure cap 400 are snap-fitted together. The mounting hole 470 is opposite to the screw hole and a fixing screw 600 is inserted to press the other end of the pressure cap 400 against the valve body 100. With the above structure, the pressure cap 400 and the valve body 100 can be easily assembled, and fewer screws are required.

[0046] In this embodiment, the snap-fit ​​portion 460 is a snap-fit ​​hole, and the snap-fit ​​mating portion 120 is a protrusion, with the snap-fit ​​hole fitting around the outer periphery of the protrusion. It is conceivable that the snap-fit ​​portion 460 and the snap-fit ​​mating portion 120 could also be a protrusion and a snap-fit ​​hole, or other structures capable of snapping together; the specific configuration can be tailored to the actual situation.

[0047] It is conceivable that the gland 400 is not limited to the structure and valve body 100 described above; for example, it can be fixed simply with screws. The specific configuration can be made according to the actual situation.

[0048] In one embodiment, the mounting cavity 110 is a strip-shaped cavity adapted to the firing hammer 300, and the firing hammer 300 slides within the mounting cavity 110, allowing it to move within the mounting cavity 110. In some embodiments, the mounting cavity 110 may also have other shapes and structures, which can be configured according to actual conditions.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A gas valve, characterized in that, include: The valve body (100) is provided with a mounting cavity (110), the mounting cavity (110) having an opening; A piezoelectric igniter (200) is installed in the mounting cavity (110), the piezoelectric igniter (200) having a trigger end (210); A firing hammer (300) is movably disposed in the mounting cavity (110) and can approach and move away from the trigger end (210) of the piezoelectric igniter (200); A gland (400) is installed on the valve body (100) and covers the opening of the mounting cavity (110); A hammer drive mechanism (500) is disposed on the valve body (100) and works in conjunction with the hammer (300). The hammer drive mechanism (500) is used to drive the hammer (300) to move and strike the trigger end (210) of the piezoelectric igniter (200). The pressure cap (400) has a first protrusion (410) and a second protrusion (420) on the surface near the mounting cavity (110). The first protrusion (410) and the second protrusion (420) extend along the moving direction of the firing hammer (300). The first protrusion (410) and the second protrusion (420) are arranged side by side at intervals and surround to form a guide groove (430). A part of the firing hammer (300) is adapted to the guide groove (430) and accommodated in the guide groove (430). The firing hammer (300) slides in cooperation with the first protrusion (410) and the second protrusion (420).

2. The gas valve according to claim 1, characterized in that: The surface where the first protrusion (410) mates with the firing hammer (300) is defined as the first contour surface, and the intersection line of the first contour surface and the plane perpendicular to the first protrusion (410) is an arc; the surface where the second protrusion (420) mates with the firing hammer (300) is defined as the second contour surface, and the intersection line of the second contour surface and the plane perpendicular to the second protrusion (420) is an arc; the surface where the firing hammer (300) mates with the first protrusion (410) and the second protrusion (420) is an arc-shaped surface.

3. The gas valve according to claim 1, characterized in that: The cover (400) is a sheet metal body, and the first protrusion (410) and the second protrusion (420) are stamped ribs.

4. The gas valve according to claim 1, characterized in that: The pressure cap (400) is a sheet metal body, and the pressure cap (400) has flanged portions (440) on both sides.

5. The gas valve according to claim 1, characterized in that: The firing hammer drive mechanism (500) includes a main shaft assembly (510) and an elastic element (520). The main shaft assembly (510) is pivotally connected to the valve body (100). The main shaft assembly (510) is provided with a toggle handle (511). The firing hammer (300) is provided with a linkage engagement part (310). The linkage engagement part (310) is positioned when the toggle handle (511) rotates with the main shaft assembly (510). In the movement path, the actuating handle (511) is used to actuate the linkage engagement part (310) to push the firing hammer (300) away from the trigger end (210) of the piezoelectric igniter (200). The elastic element (520) is disposed between the firing hammer (300) and the valve body (100). The elastic element (520) is used to provide a reset force that causes the firing hammer (300) to push against the trigger end (210).

6. The gas valve according to claim 5, characterized in that: The elastic element (520) is installed in the mounting cavity (110). The elastic element (520) is cylindrical, and the compression elongation direction of the elastic element (520) is the axial direction of the cylindrical shape. The first protrusion (410) and the second protrusion (420) extend to positions opposite to the elastic element (520). A portion of the elastic element (520) is adapted to and accommodated in the guide groove (430). The elastic element (520) slides in cooperation with the first protrusion (410) and the second protrusion (420).

7. The gas valve according to claim 6, characterized in that: The elastic element (520) is a spring.

8. The gas valve according to claim 1, characterized in that: The pressure cap (400) has a top pressure protrusion (450) on the surface near the mounting cavity (110). The top pressure protrusion (450) is opposite to the piezoelectric igniter (200) and is used to press the piezoelectric igniter (200) against the mounting cavity (110).

9. The gas valve according to claim 1, characterized in that: One end of the pressure cap (400) is provided with a snap-fit ​​part (460), and the valve body (100) is provided with a snap-fit ​​mating part (120) corresponding to the snap-fit ​​part (460). The other end of the pressure cap (400) is provided with a mounting hole (470), and the valve body (100) is provided with a screw hole corresponding to the mounting hole (470). The snap-fit ​​part (460) and the snap-fit ​​mating part (120) of the pressure cap (400) are snap-fit ​​mated together. The mounting hole (470) is opposite to the screw hole and a fixing screw (600) is inserted to press the other end of the pressure cap (400) against the valve body (100).

10. The gas valve according to claim 1, characterized in that: The mounting cavity (110) is a strip-shaped cavity adapted to the firing hammer (300), and the firing hammer (300) is slidably disposed in the mounting cavity (110).

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