Ignition-facilitating ignition frame structure for plug valve

Abstract

The utility model relates to an ignition-facilitating ignition frame structure for a plug valve, which comprises an ignition tube, an ignition needle and a metal mounting plate used for being fixed on a gas valve body, an air entraining channel used for being communicated with an air outlet end of the gas valve body is arranged in the ignition tube, and both the ignition needle and the ignition tube are fixed on the metal mounting plate; the ignition device is characterized in that the front end of the metal installation plate is provided with a shielding part which is bent upwards, the shielding part is located right in front of the opening end of the ignition tube, the area of the shielding part is smaller than that of the opening end of the ignition tube, and the needle head part of the ignition needle is located on the side portion of the shielding part. When the ignition needle ignites, an electric arc can be formed between the ignition needle and the shielding part, the electric arc is located in front of the opening end of the ignition pipe, in addition, part of fuel gas ejected from the air entraining channel is blocked by the shielding part and guided outwards in the radial direction to the position near the ignition needle, the ignition needle can ignite the fuel gas more efficiently, and ignition sensitivity is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas valves, and particularly relates to an ignition rack structure for a plug valve which is conducive to ignition. The gas valve is used for an outdoor gas barbecue stove. Background Art

[0002] The Chinese utility model patent "Ignition rack for gas valve" with patent number ZL201721693871.1 (authorization announcement number CN207610235U) applied by the applicant discloses such an ignition rack, including an ignition rack part plugged into the gas outlet end of the gas valve body, the ignition rack part has an air bleed channel connected to the gas outlet end of the gas valve body, and a sealing cover is provided at the outlet of the air bleed channel, and a plurality of small air outlet holes are opened on the sealing cover. The ignition rack part includes an air guide pipe and an air guide shell, and the air guide shell is also provided with a through hole for the ignition wire of the gas valve body to pass through. The air guide shell is made of ceramic material, and a metal needle is fixed on the gas guide shell, and the metal needle and the ignition wire (also called ignition needle) are arranged at intervals. The metal needle and the ignition wire generate an arc to ignite the gas. Then,

[0003] The setting of the sealing cover can effectively prevent foreign objects (such as insects or grease) from entering the channel and causing normal ignition. However, the ignition needle is located directly in front of the sealing cover, and the gas is ejected forward at high speed from the ignition channel. The ignition needle is located on the side of the gas channel, so that the gas density around the ignition needle cannot quickly reach the ignition requirement, and sometimes multiple ignitions may be required to ignite.

[0004] For this reason, the existing ignition rack of the gas valve used for the outdoor gas barbecue stove can be further improved. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide an ignition rack for a gas valve which has a reasonable structural design and can effectively prevent foreign matter from entering the air duct in view of the above-mentioned existing technical status.

[0006] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: an ignition frame structure for a plug valve that is conducive to ignition, including an ignition tube, an ignition needle and a metal mounting plate for fixing to a gas valve body, the ignition tube having an air inlet channel for communicating with the gas outlet end of the gas valve body, the ignition needle and the ignition tube are both fixed to the metal mounting plate; it is characterized in that: the front end of the metal mounting plate has an upwardly bent shielding portion, the shielding portion is located just in front of the mouth end of the ignition tube, the area of ​​the shielding portion is smaller than the area of ​​the mouth end of the ignition tube, and the needle head of the ignition needle is located on the side of the shielding portion.

[0007] In order to facilitate the fixing of the ignition tube on the metal mounting plate, as an improvement, the metal mounting plate is stamped and bent to form a vertical mounting portion extending upward, and the vertical mounting portion is provided with a perforation for the ignition tube to pass through and the aperture size matches the diameter of the ignition tube. During assembly, the metal mounting plate is fixed to the gas valve body, and then the ignition tube is passed through the perforation and connected to the gas outlet end of the gas valve body. The connection between the ignition tube and the gas outlet end can adopt the existing technology, because the aperture size of the perforation matches the diameter of the ignition tube. After the ignition tube is inserted, the perforation forms a circumferential constraint on the ignition tube, and the inner end of the ignition tube is fixedly connected to the gas valve, and the metal mounting plate is fixed to the gas valve, thereby realizing the relative fixation of the metal mounting plate, the ignition tube and the gas valve body. Compared with the traditional ignition tube fixed to the metal mounting plate by a clamp, this installation method is simpler.

[0008] As a preferred fixing method of the metal mounting plate and the gas valve body, the rear end of the metal mounting plate is bent to form a slot, and the gas valve body is formed with an insert edge. The insert edge is inserted into the slot and then the metal mounting plate and the insert edge are fixed together by screws.

[0009] In order to facilitate fixing the ignition needle on the metal mounting plate, the side of the metal mounting plate has a lateral convex transverse mounting portion, and the ignition needle is fixed on the transverse mounting portion by a clamp connected to the transverse mounting portion by a buckle.

[0010] As a further improvement, an insect-proof net is provided in the air bleed passage of the ignition tube, which can better prevent foreign matter (such as small insects or grease) from entering the air bleed passage.

[0011] In order to facilitate the fixing of the insect-proof net to the air inlet channel, the front end of the air inlet channel is provided with an annular inner shoulder blade, and the insect-proof net is placed on the inner shoulder blade and fixed by a retaining spring through the hole. When fixing, just put the insect-proof net into the air inlet channel first, put the insect-proof net on the inner shoulder blade, and then put the retaining spring through the hole into the air inlet channel, and the installation is completed.

[0012] As an improvement, the shielding part is T-shaped, and the small cross-sectional area part of the shielding part extends to the front of the mouth of the ignition tube. The shielding part is T-shaped, with a large cross-sectional area part and a small cross-sectional area part. The large cross-sectional area part is connected to the metal mounting plate to increase the connection strength. The small cross-sectional area part extends to the front of the mouth of the ignition tube to block the gas. The blocking area is small and will not affect the amount of gas sprayed forward. Part of the gas is blocked by the small cross-sectional area part of the shielding part and can flow more toward the ignition needle. The arc generated between the ignition needle and the shielding part ensures contact with the gas, and the ignition success rate is higher.

[0013] Compared with the prior art, the utility model has the advantages that: the front end of the metal mounting plate has an upwardly bent shielding portion, the shielding portion is located directly in front of the mouth of the ignition tube, the area of ​​the shielding portion is smaller than the area of ​​the mouth of the ignition tube, and the needle head of the ignition needle is located on the side of the shielding portion. When the ignition needle ignites, an arc can be formed between the ignition needle and the shielding portion, and the arc is located in front of the mouth of the ignition tube. In addition, part of the gas ejected from the air bleed channel is blocked by the shielding portion and radially guided outward to the vicinity of the ignition needle, which is conducive to the ignition needle igniting the gas more efficiently and having better ignition sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0015] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of the metal mounting plate in the embodiment of the utility model. DETAILED DESCRIPTION

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] like Figures 1 to 3 Shown is a preferred embodiment of the utility model.

[0019] A spark ignition frame structure for a plug valve that is conducive to ignition, comprising an spark ignition tube 1, an ignition needle 2 and a metal mounting plate 3 fixed to a gas valve body 4, wherein the spark ignition tube 1 has an air inlet channel 11 for communicating with the gas outlet end of the gas valve body 4, and the ignition needle 2 and the spark ignition tube 1 are both fixed to the metal mounting plate 3; a slot 33 is formed at the rear end of the metal mounting plate 3 by bending, and an insert edge 41 is formed on the gas valve body 4, and the insert edge 41 is inserted into the slot 33 and then the metal mounting plate 3 and the insert edge 41 are fixed together by screws 9.

[0020] The front end of the metal mounting plate 3 has an upwardly bent shielding portion 31, which is located just in front of the mouth of the ignition tube 1. The area of ​​the shielding portion 31 is smaller than the area of ​​the mouth of the ignition tube 1, and the needle head 21 of the ignition needle 2 is located on the side of the shielding portion 31. The shielding portion 31 is T-shaped, and the small cross-sectional area portion of the shielding portion 31 extends just in front of the mouth of the ignition tube 1.

[0021] The metal mounting plate 3 is stamped and bent to form a vertical mounting portion 32 extending upward, and the vertical mounting portion 32 is provided with a through hole 321 for the ignition tube 1 to pass through and the aperture size matches the diameter of the ignition tube 1. The side of the metal mounting plate 3 has a side convex transverse mounting portion 34, and the ignition needle 2 is fixed to the transverse mounting portion 34 by a clamp 6 connected to the transverse mounting portion 34 by a buckle.

[0022] An insect-proof net 7 is provided in the air bleed channel 11 of the ignition tube 1. The front end of the air bleed channel 11 is provided with an annular inner shoulder blade 111, and the insect-proof net 7 is placed on the inner shoulder blade 111 and fixed with a retaining spring 8 through a hole.

[0023] The front end of the metal mounting plate 3 has an upwardly bent shielding portion 31, which is located just in front of the mouth of the ignition tube 1. The area of ​​the shielding portion 31 is smaller than the area of ​​the mouth of the ignition tube 1, and the needle head 21 of the ignition needle 2 is located on the side of the shielding portion 31. When the ignition needle 2 ignites, an arc can be formed between the needle head 21 of the ignition needle 2 and the shielding portion 31, and the arc is located in front of the mouth of the ignition tube 1. In addition, part of the gas ejected from the air duct 11 is blocked by the shielding portion 31 and radially guided outward to the vicinity of the ignition needle 2, which is conducive to the ignition needle 2 to ignite the gas more efficiently and has better ignition sensitivity.

[0024] It should be noted that in the description of this embodiment, the terms "front, back", "left, right", "inside, outside", "upper, lower" and the like indicating directions or positional relationships are all based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. The terms "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An ignition frame structure for a plug valve that facilitates ignition, comprising an ignition tube (1), an ignition needle (2) and a metal mounting plate (3) for fixing to a gas valve body (4), wherein the ignition tube (1) has an air inlet passage (11) for communicating with the gas outlet end of the gas valve body (4), and the ignition needle (2) and the ignition tube (1) are both fixed to the metal mounting plate (3); characterized in that: The front end of the metal mounting plate (3) has an upwardly bent shielding portion (31), the shielding portion (31) is located directly in front of the mouth of the ignition tube (1), the area of ​​the shielding portion (31) is smaller than the area of ​​the mouth of the ignition tube (1), and the needle head (21) of the ignition needle (2) is located on the side of the shielding portion (31).

2. The ignition-friendly ignition stand structure for a plug valve according to claim 1, characterized in that: The metal mounting plate (3) is stamped and bent to form a vertical mounting portion (32) extending upward, and the vertical mounting portion (32) is provided with a through hole (321) for the ignition tube (1) to pass through and the hole diameter matches the diameter of the ignition tube (1).

3. The ignition-friendly ignition stand structure for a plug valve according to claim 2, characterized in that: The rear end of the metal mounting plate (3) is bent to form a slot (33), and the gas valve body (4) is formed with an insert edge (41). The insert edge (41) is inserted into the slot (33) and then the metal mounting plate (3) and the insert edge (41) are fixed together by screws (9).

4. The ignition-friendly ignition stand structure for a plug valve according to claim 1, characterized in that: The side of the metal mounting plate (3) has a side-convex transverse mounting portion (34), and the ignition needle (2) is fixed on the transverse mounting portion (34) by means of a clamp (6) that is snap-connected to the transverse mounting portion (34).

5. The ignition-friendly ignition stand structure for a plug valve according to claim 1, characterized in that: An insect-proof net (7) is provided in the air bleed passage (11) of the ignition tube (1).

6. The ignition rack structure for a plug valve that facilitates ignition according to claim 5, characterized in that: The front end of the air intake passage (11) is provided with an annular inner shoulder blade (111), and the insect-proof net (7) is placed on the inner shoulder blade (111) and fixed by a retaining spring (8) through a hole.

7. The ignition-friendly ignition stand structure for a plug valve according to claim 1, characterized in that: The shielding portion (31) is T-shaped, and a portion of the shielding portion (31) with a small cross-sectional area extends to the front of the mouth of the ignition tube (1).

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