Ignition tube structure of gas valve

Abstract

The utility model relates to an ignition tube structure of a gas valve, which comprises a tube body with a first gas outlet channel penetrating axially, and is characterized in that the front end of the tube body is connected with a ventilation joint, the ventilation joint is provided with a plurality of second gas outlet channels penetrating axially, the second gas outlet channels are communicated with the first gas outlet channel, and the second gas outlet channels are communicated with the first gas outlet channel. An annular air entraining groove is formed in the peripheral wall of the ventilation connector and divides the second air outlet channel into a front part and a rear part, the front part and the rear part are the front second air outlet channel and the rear second air outlet channel respectively, and the rear second air outlet channel is directly communicated with the first air outlet channel. Part of fuel gas jetted from the second rear gas outlet channel is blocked by the front end face of the gas entraining groove and guided outwards in the radial direction, the part of fuel gas can be closer to the ignition needle, the fuel gas can be ignited more efficiently through the ignition needle, and ignition sensitivity is better. The multiple second air outlet channels are arranged, so that the caliber of each second air outlet channel is very small, and the second air outlet channels are separated by the air entraining grooves, so that foreign matters are better prevented from entering the second air outlet channels.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas cocks, and in particular relates to an ignition pipe structure on an ignition rack of a gas valve. The gas cock is used for outdoor gas barbecue stoves. Background Art

[0002] like Figure 5 As shown, the existing gas valve for outdoor gas barbecue stoves includes a gas valve body 1' and a ignition rack arranged on the gas outlet channel of the gas valve body 1'. The ignition rack is a tubular component 2' made of metal with a gas outlet channel. The ignition needle 3' of the gas valve is aligned with the gas outlet end 21' of the tubular component 2'. When ignited, the gas is ejected from the gas outlet end 21' of the tubular component 2', and the ignition needle 3' generates sparks to ignite the gas. Because the outdoor gas barbecue stove is placed outdoors for use, and the gas outlet end 21' of the existing ignition rack is open, and the ventilation channel is straight-through, insects or grease can easily enter the gas outlet end of the ignition rack and block the gas outlet end, which will cause the gas barbecue stove to fail to ignite normally, and the gas outlet end needs to be cleaned.

[0003] In view of the above-mentioned situation, 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 a structure, 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 cover is provided at the outlet of the air bleed channel, and a plurality of small air outlet holes are opened on the cover. The setting of the cover can effectively prevent foreign matter (such as insects or grease) from entering the channel and causing the failure of normal ignition. However, the ignition needle is located in front of the cover, and the gas is easy to escape to the surroundings after being ejected from the cover, especially in the windy outdoors, and the gas density around the ignition needle cannot quickly reach the ignition requirement, or it needs to be ignited multiple times before it can be ignited.

[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 a ignition pipe structure of a gas valve with a reasonable structural design, which can effectively prevent foreign matter from entering the air bleed channel and can guide the ejected gas to a certain extent in response to the above-mentioned existing technical status.

[0006] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a ignition pipe structure of a gas valve, including a pipe body with an axially penetrating first air outlet channel, characterized in that: the front end of the pipe body is connected to a vent joint, and a plurality of axially penetrating second air outlet channels are opened on the vent joint, the second air outlet channels are connected to the first air outlet channel, and an annular air inlet groove is opened on the outer peripheral wall of the vent joint, the air inlet groove divides the second air outlet channel into two parts, namely a front second air outlet channel and a rear second air outlet channel, and the rear second air outlet channel is directly connected to the first air outlet channel.

[0007] As a further improvement, the front end surface of the air guide groove is a guide surface that is radially inclined outward from the rear to the front. A portion of the gas ejected from the rear second gas outlet channel will be blocked by the guide surface, so that this portion of the gas flows outward along the guide surface, and this portion of the gas can be closer to the ignition needle, which is conducive to the ignition needle igniting the gas. Another portion of the gas is directly ejected through the front second gas outlet channel to ignite the fire grate.

[0008] As an option, the guide surface is an inclined surface, an inner concave arc surface, or an outer convex arched surface.

[0009] As a further improvement, the ventilation joint is further provided with a central gas outlet channel axially penetrating and directly connected to the first gas outlet channel, the central gas outlet channel is not separated by the air inlet groove, and the second gas outlet channels are arranged around the central gas outlet channel along the circumference. The central gas outlet channel is arranged to ensure that part of the gas is directly ejected from the front end to form a jet, which can be better mixed with the air to ignite the fire grate.

[0010] Preferably, the ventilation joint is threadedly connected to the pipe body. The threaded connection has the advantage of a reliable connection. Of course, other existing structures can also be used to connect the ventilation joint to the front end of the pipe body.

[0011] As a specific structure of the threaded connection, the rear end of the above-mentioned vent connector has a connection cavity, the inner peripheral wall of the connection cavity is provided with an internal thread, and the outer peripheral wall of the front end of the tube body is provided with an external thread, and the external thread is threadedly connected with the internal thread to connect the tube body and the vent connector together. The connection cavity covers the front end of the tube body to better avoid air leakage and enhance the reliability of the threaded connection.

[0012] In order to facilitate the use of a hexagonal wrench to thread the vent connector to the pipe body, a hexagonal head convenient for the wrench to drive is formed at the rear end of the vent connector, so that the vent connector can be firmly fixed to the front end of the pipe body.

[0013] As an improvement, an inlet hole is opened on the peripheral wall of the tube body. The high-speed gas forms a jet, which can better introduce air from the inlet into the tube body and fully mix it with the gas, so that the gas mixed with air is easier to ignite.

[0014] Compared with the prior art, the advantages of the utility model are: an annular air inlet groove is opened on the outer peripheral wall of the ventilation joint, and the air inlet groove divides the second air outlet channel into two parts, namely the front second air outlet channel and the rear second air outlet channel. Part of the gas ejected from the rear second air outlet channel is blocked by the front end surface of the air inlet groove and guided radially outward, and this part of the gas can be closer to the ignition needle, which is conducive to the ignition needle to ignite the gas more efficiently and the ignition sensitivity is better; there are multiple second air outlet channels, so that the diameter of each second air outlet channel is very small, and it will not affect the output of the gas, and better prevent foreign matter (such as small insects or grease) from entering the second air outlet channel. Moreover, the second air outlet channel is separated by the air inlet groove, and foreign matter (such as small insects or grease) is less likely to enter the first air outlet channel of the trachea. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0016] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0017] Figure 3 It is a three-dimensional exploded view of an embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the embodiment of the utility model used on a gas valve;

[0019] Figure 5 The present invention is a schematic diagram of the three-dimensional structure of the ignition rack of the existing gas valve. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0021] like Figures 1 to 5 Shown is a preferred embodiment of the utility model.

[0022] A ignition pipe structure of a gas valve comprises a pipe body 1 having a first gas outlet passage 2a extending axially therethrough, and an inlet hole 12 is formed on the peripheral wall of the pipe body 1. A vent joint 3 is threadedly connected to the pipe body 1. The rear end of the vent joint 3 has a connecting cavity 32, and the inner peripheral wall of the connecting cavity 32 is provided with an internal thread 321. The front peripheral wall of the pipe body 1 is provided with an external thread 11, and the external thread 11 is threadedly connected with the internal thread 321 to connect the pipe body 1 and the vent joint 3 together. The rear end of the vent joint 3 is formed with a hexagonal head 33 for convenient wrench driving.

[0023] The front end of the tube body 1 is connected to a vent connector 3, on which a plurality of second air outlet channels 2b are axially penetrated, and the second air outlet channels 2b are connected to the first air outlet channel 2a. An annular air inlet groove 31 is formed on the outer peripheral wall of the vent connector 3, and the air inlet groove 31 divides the second air outlet channel 2b into two parts, namely the front second air outlet channel 2b1 and the rear second air outlet channel 2b2, and the rear second air outlet channel 2b2 is directly connected to the first air outlet channel 2a. The front end surface of the air inlet groove 31 is a guide surface 311 that is radially inclined outward from the back to the front. The guide surface 311 is an inclined surface or an inner concave arc surface or an outer convex arched surface. A central air outlet channel 2c that axially penetrates and is directly connected to the first air outlet channel 2a is provided at the central axis of the vent connector 3, and the central air outlet channel 2c is not separated by the air inlet groove 31, and the second air outlet channels 2b are arranged around the central air outlet channel 2c along the circumference.

[0024] like Figure 4 As shown, when the ignition tube is used in conjunction with the gas valve 4, it is directly connected to the gas valve 4 and connected to an outlet passage of the gas valve 4, and the tube body 1 is installed on a bracket 5, and the bracket 5 is equipped with an ignition needle 6. This is basically the same as the use of the traditional ignition tube.

[0025] An annular air inlet groove 31 is provided on the outer peripheral wall of the vent joint 3, and the air inlet groove 31 divides the second air outlet channel 2b into two parts, a front second air outlet channel 2b1 and a rear second air outlet channel 2b2. Part of the gas ejected from the rear second air outlet channel 2b2 is blocked by the guide surface 311 of the air inlet groove 31 and guided radially outward, so that this part of the gas can be closer to the ignition needle 6, which is conducive to the ignition needle 6 to ignite the gas more efficiently and the ignition sensitivity is better; there are multiple second air outlet channels 2b, so that the diameter of each second air outlet channel 2b is very small, and it will not affect the output of the gas, and it is better to prevent foreign matter (such as small insects or grease) from entering the second air outlet channel 2b, and the second air outlet channel 2b is separated by the air inlet groove, so foreign matter (such as small insects or grease) is less likely to enter the first air outlet channel 2a of the trachea.

[0026] 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. A ignition pipe structure of a gas valve, comprising a pipe body (1) having a first gas outlet passage (2a) extending axially therethrough, characterized in that: The front end of the tube body (1) is connected to a vent connector (3), and a plurality of axially penetrating second air outlet channels (2b) are provided on the vent connector (3), and the second air outlet channels (2b) are connected to the first air outlet channel (2a). An annular air guide groove (31) is provided on the outer peripheral wall of the vent connector (3), and the air guide groove (31) separates the second air outlet channel (2b) into two parts, namely a front second air outlet channel (2b1) and a rear second air outlet channel (2b2), and the rear second air outlet channel (2b2) ​​is directly connected to the first air outlet channel (2a).

2. The ignition pipe structure of the gas valve according to claim 1, characterized in that: The front end surface of the air guide groove (31) is a guide surface (311) that is inclined radially outward from the rear to the front.

3. The ignition pipe structure of the gas valve according to claim 2, characterized in that: The guide surface (311) is an inclined surface, an inner concave arc surface, or an outer convex arched surface.

4. The ignition pipe structure of the gas valve according to claim 1, characterized in that: The vent joint (3) is also provided with a central air outlet channel (2c) axially penetrating and directly communicating with the first air outlet channel (2a); the central air outlet channel (2c) is not interrupted by the air guide groove (31); and the second air outlet channels (2b) are arranged around the central air outlet channel (2c) at intervals along the circumference.

5. The ignition pipe structure of the gas valve according to claim 1, characterized in that: The ventilation joint (3) is threadedly connected to the pipe body (1).

6. The ignition pipe structure of the gas valve according to claim 5, characterized in that: The rear end of the vent connector (3) has a connecting cavity (32), the inner peripheral wall of the connecting cavity (32) is provided with an internal thread (321), the front peripheral wall of the pipe body (1) is provided with an external thread (11), and the external thread (11) is threadedly connected with the internal thread (321) to connect the pipe body (1) and the vent connector (3) together.

7. The ignition pipe structure of the gas valve according to claim 5, characterized in that: The rear end of the vent joint (3) is formed with a hexagonal head (33) which is convenient for driving with a wrench.

8. The ignition pipe structure of the gas valve according to claim 1, characterized in that: An introduction hole (12) is provided on the peripheral wall of the tube body (1).

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