Connecting device for gas valve

Abstract

The utility model provides a connecting device for a gas valve, and belongs to the technical field of gas accessories. The problem that an existing gas valve is inconvenient to assemble and disassemble is solved. The connecting device for the gas valve comprises a valve body, the valve body is provided with a connecting end communicated with an inner cavity of the valve body, the connecting end is connected with a loose joint nut, the loose joint nut is connected with a hollow gas distribution pipe connected with a gas stove pipeline connecting hole, and a sealing structure is arranged between the connecting end and the gas distribution pipe. The sealing structure enables the connecting end and the gas distribution pipe to be sealed in the radial direction, and the connecting end is communicated with the gas distribution pipe. The utility model has the advantages of convenient loading and unloading, good air tightness and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas accessories and relates to a gas valve, in particular to a connecting device for the gas valve. Background Art

[0002] The gas valve is used to control the flow of gas to adjust the size of the fire. For example, Chinese patent literature discloses a gas valve [application number: 202111513059.7; authorization announcement number: CN114151575B], which includes a valve stem and a valve body, the valve body has a valve cavity, the valve body has an air inlet end and a large and small fire outlet end both connected to the valve cavity, a valve core is provided in the valve cavity, the outer wall of the valve stem is embedded with a sealing ring sealed to the inner wall of the valve cavity, the valve core includes a cylindrical shell axially limitedly connected to the inner end of the valve stem, and the shell is provided with a large fire hole, a small fire hole and a long open fire hole that are radially through and are all in the shape of arc grooves.

[0003] The above-mentioned gas valve is the same as other existing gas valves. The air inlet end of the gas valve is used to be fixedly connected to the gas stove pipeline. The gas stove pipeline is in the shape of a straight tube and has a plurality of connecting holes arranged in a row on the outer wall. Each connecting hole is welded or threadedly connected with a joint. The air inlet end of the gas valve is threadedly connected to the joint. In this way, the gas valve takes the axis of the air inlet end as the rotation axis and needs to perform multiple 360° rotations to drive the air inlet end to be threadedly connected to the joint of the gas stove pipeline. In order to avoid collision and interference between adjacent gas valves, the distance between the connecting holes on the gas stove pipeline should be long enough, which will make the overall volume of the gas stove not small and delicate enough. Moreover, the gas valve After connecting the gas stove pipeline, the positioning accuracy must be ensured (according to the design requirements, the air outlet of the gas valve must be set 90° inward or downward). The threaded connection between the air inlet end and the gas stove pipeline cannot ensure the positioning accuracy of the gas valve. It is often necessary to back off half a circle of screw-in to ensure the positioning accuracy of the gas valve. Finally, the threaded connection between the air inlet end and the gas stove pipeline is not tight enough, and glue is needed to cure the threaded connection. However, the glue seal under the loose threaded connection has the risk of air leakage. In addition, the glue must be cured for 24 hours before the next process can be carried out, and the work efficiency is not high. Summary of the invention

[0004] The utility model aims to solve the above problems existing in the prior art and provides a connecting device for a gas valve which is convenient to load and unload and has good air tightness.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a connecting device for a gas valve, comprising a valve body, the valve body having a connecting end connected to its inner cavity, characterized in that the connecting end is connected to a union nut, the union nut is connected to a hollow gas distribution pipe connected to a gas stove pipeline connection hole, a sealing structure is provided between the connecting end and the gas distribution pipe, and when the connecting end, the union nut and the gas distribution pipe are tightened, the sealing structure enables radial sealing between the connecting end and the gas distribution pipe and the connecting end and the gas distribution pipe are connected.

[0006] In the above-mentioned connection device for the gas valve, the connection end is threadedly connected to a hollow joint via an internal thread, the outer end of the joint has a radially outward-turned shoulder, the union nut is sleeved outside the joint and the flange of the union nut is blocked by the shoulder, and the gas distribution pipe is threadedly connected to the union nut via an external thread.

[0007] In the above-mentioned connection device for the gas valve, the sealing structure includes an annular sealing gasket. When the connection end, the union nut and the gas distribution pipe are tightened, the top surface of the sealing gasket seals against the sealing surface of the joint, and the bottom surface of the sealing gasket seals against the sealing surface of the gas distribution pipe.

[0008] As another case, in the above-mentioned gas valve connection device, the sealing structure includes a conical hole that expands outwards on the inner wall of the joint toward the end of the gas distribution pipe, and the gas distribution pipe has an insertion end inserted into the conical hole, and the outer wall of the insertion end is a conical surface that matches the conical hole. In this way, the joint and the gas distribution pipe are hard-sealed to ensure airtightness. Of course, in actual manufacturing, a conical hole can be set at the end of the gas distribution pipe, and the end of the joint forms an insertion end with a conical surface, and the two are hard-sealed.

[0009] In the above-mentioned connecting device for the gas valve, the outer wall of the middle part of the gas distribution pipe has an outer hexagonal clamping surface, and the outer end of the gas distribution pipe has an internal thread or an external thread.

[0010] In the above-mentioned connecting device for the gas valve, the joint has a hexagonal hole.

[0011] As another case, in the above-mentioned connection device for the gas valve, the union nut is threadedly connected to the connection end through an internal thread, the union nut is sleeved on the outside of the gas distribution pipe, the inner end of the gas distribution pipe has a radially outwardly protruding convex edge, and the retaining edge of the union nut abuts against the bottom surface of the convex edge.

[0012] In the above-mentioned connection device for the gas valve, the sealing structure includes an annular sealing ring. When the connection end, the union nut and the gas distribution pipe are tightened, the top surface of the sealing ring seals against the sealing surface of the connection end, and the bottom surface of the sealing ring seals against the sealing surface of the gas distribution pipe.

[0013] In the above-mentioned connection device for gas valve, the sealing structure includes a conical hole which expands outwards on the inner wall of the connection end toward the end of the gas distribution pipe, and the gas distribution pipe has an insertion end inserted into the conical hole, and the outer wall of the insertion end is a conical surface matching the conical hole. In this way, the connection end and the gas distribution pipe are hard-sealed to ensure airtightness. Of course, in actual manufacturing, a conical hole can be set at the end of the gas distribution pipe, and the end of the connection end forms an insertion end with a conical surface, and the two are hard-sealed.

[0014] In the above-mentioned connection device for the gas valve, the gas distribution pipe has an inner hexagonal hole, and the outer end of the gas distribution pipe has an inner thread or an outer thread.

[0015] Compared with the prior art, the connecting device for the gas valve is easy to load and unload, convenient for after-sales maintenance, and the valve body is easy and accurate to position, easy to operate, good in air tightness, and safe in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the connection device for the gas valve.

[0017] Figure 2 It is a structural sectional view of the connecting device for the gas valve.

[0018] Figure 3 It is a schematic cross-sectional view of the structure of the connecting device for the gas valve in the second embodiment.

[0019] Figure 4 It is a schematic diagram of the structure of the gas stove pipeline.

[0020] In the figure, 1, valve body; 2, connecting end; 3, union nut; 31, flange; 4, gas distribution pipe; 41, external hexagonal clamping surface; 42, convex edge; 5, joint; 51, shoulder; 6, sealing gasket; 7, sealing ring; 8, gas stove pipeline; 81, connecting hole. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments. Embodiment 1

[0022] like Figure 1 , Figure 2 and Figure 4 As shown, the connection device for the gas valve includes a valve body 1, the valve body 1 has a connection end 2 connected to its inner cavity, the connection end 2 is connected to a union nut 3, the union nut 3 is connected to a hollow gas distribution pipe 4 for connecting to a connection hole 81 of a gas stove pipeline 8, and a sealing structure is provided between the connection end 2 and the gas distribution pipe 4. When the connection end 2, the union nut 3 and the gas distribution pipe 4 are tightened, the sealing structure makes the connection end 2 and the gas distribution pipe 4 radially sealed and the connection end 2 and the gas distribution pipe 4 are connected.

[0023] When the gas valve connection device is used, the gas distribution pipe 4 is first connected to the pipeline of the gas stove, and then the valve body 1 is positioned, and the union nut 3 is rotated to tighten the connection end 2, the union nut 3 and the gas distribution pipe 4. The sealing structure makes the connection end 2 and the gas distribution pipe 4 radially sealed, thus ensuring air tightness and good safety in use; through the above operation, the valve body 1 does not need to be rotated for installation, the valve body 1 is conveniently and accurately positioned, and there is no collision and interference problem between adjacent valve bodies 1, so the spacing between the connection holes 81 on the pipeline 8 of the gas stove can be shortened, the pipeline can be shortened, and the overall volume of the gas stove is small, and the connection end 2, the union nut 3 and the gas distribution pipe 4 are tightly After solidification, there is no need to wait for the anaerobic adhesive to solidify for more than 24 hours before the next process can be carried out, and the work efficiency is high. When maintenance is needed, the connection end 2 and the air distribution pipe 4 can be disassembled by rotating the union nut 3, which is convenient for after-sales maintenance. In addition, during actual manufacturing, in order to make the connection more firm and airtight, glue can be applied to the threaded connection of the union nut 3. Because the connection end 2, the union nut 3 and the air distribution pipe 4 are already tightened, there is no need to consider the glue curing time, and the next process can be carried out directly. During disassembly, a hair dryer or a hot melt gun is used to heat the glue at the union nut 3, and the union nut 3 is rotated to realize the disassembly of the connection end 2 and the air distribution pipe 4.

[0024] The connecting end 2 is threadedly connected to a hollow joint 5 via an internal thread. The outer end of the joint 5 has a radially outward-turned shoulder 51. The union nut 3 is sleeved outside the joint 5 and the flange 31 of the union nut 3 is blocked by the shoulder 51. The distribution pipe 4 is threadedly connected to the union nut 3 via an external thread.

[0025] The connecting end 2 is connected to the union nut 3 through the joint 5. When in use, the union nut 3 is first inserted into the joint 5, and the joint 5 is threadedly connected to the connecting end 2. Then, the gas distribution pipe 4 is connected to the pipeline of the gas stove, and then the external thread of the gas distribution pipe 4 is threadedly connected to the union nut 3. The union nut 3 is rotated to lock the gas distribution pipe 4 to the joint 5 until the connecting end 2, the union nut 3 and the gas distribution pipe 4 are tightened. The sealing structure ensures the air tightness. When disassembling, the union nut 3 is rotated to complete the separation of the gas distribution pipe 4 and the union nut 3, which is convenient for after-sales maintenance.

[0026] The sealing structure includes an annular sealing gasket 6. When the connection end 2, the union nut 3 and the gas distribution pipe 4 are tightened, the top surface of the sealing gasket 6 seals against the sealing surface of the joint 5, and the bottom surface of the sealing gasket 6 seals against the sealing surface of the gas distribution pipe 4. The joint 5 and the connection end 2 are threadedly connected, and the sealing gasket 6 ensures the airtightness between the joint 5 and the gas distribution pipe 4, which is safe to use.

[0027] The outer wall of the middle part of the gas distribution pipe 4 has an outer hexagonal clamping surface 41, and the outer end of the gas distribution pipe 4 has an inner thread or an outer thread. In this way, the outer hexagonal clamping surface 41 is clamped by a wrench, which facilitates the threaded connection between the gas distribution pipe 4 and the connecting hole 81 of the gas stove pipeline 8. In this embodiment, the outer end of the gas distribution pipe 4 has an outer thread, and the outer hexagonal clamping surface 41 is still clamped by the wrench during the rotation of the union nut 3, so that the gas distribution pipe 4 will not rotate and affect the tightening efficiency of the union nut 3.

[0028] The joint 5 has a hexagonal hole, so that the joint 5 is easy to install, the outer wall of the joint 5 does not need to increase the clamping surface, the axial length of the joint 5 is short, and the manufacturing cost is low. Embodiment 2

[0029] like Figure 3 As shown, in this embodiment, the union nut 3 is threadedly connected to the connection end 2 through an internal thread, and the union nut 3 is sleeved on the outside of the distribution pipe 4. The inner end of the distribution pipe 4 has a radially outwardly protruding convex edge 42, and the retaining edge 31 of the union nut 3 abuts against the bottom surface of the convex edge 42.

[0030] When in use, first insert the air distribution pipe 4 into the union nut 3, then connect the air distribution pipe 4 and the ventilation pipe, then rotate the union nut 3 to threadably connect with the connecting end 2 until the connecting end 2, the union nut 3 and the air distribution pipe 4 are tightened, and the sealing structure ensures the air tightness; when disassembling, rotate the union nut 3 to complete the separation of the air distribution pipe 4 and the union nut 3, which is convenient for after-sales maintenance.

[0031] The sealing structure includes an annular sealing ring 7. When the connection end 2, the union nut 3 and the gas distribution pipe 4 are fastened, the top surface of the sealing ring 7 seals against the sealing surface of the connection end 2, and the bottom surface of the sealing ring 7 seals against the sealing surface of the gas distribution pipe 4. This structure is simple, and the sealing ring 7 ensures airtightness.

[0032] The gas distribution pipe 4 has an inner hexagonal hole, and the outer end of the gas distribution pipe 4 has an inner thread or an outer thread. The inner hexagonal hole is convenient for inserting an inner hexagonal wrench to drive the gas distribution pipe 4 to rotate, and is convenient for the threaded connection between the gas distribution pipe 4 and the gas stove pipeline 8. In this embodiment, the outer end of the gas distribution pipe 4 has an outer thread.

[0033] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The specific embodiments described in this article are only used to illustrate the spirit of the utility model. The technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar way, but they will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. A connection device for a gas valve, comprising a valve body (1), wherein the valve body (1) has a connection end (2) communicating with an inner cavity thereof, It is characterized in that The connecting end (2) is connected to a union nut (3), and the union nut (3) is connected to a hollow gas distribution pipe (4) for connection to a connecting hole (81) of a gas stove pipeline (8). A sealing structure is provided between the connecting end (2) and the gas distribution pipe (4). When the connecting end (2), the union nut (3) and the gas distribution pipe (4) are fastened, the sealing structure enables radial sealing between the connecting end (2) and the gas distribution pipe (4), and the connecting end (2) and the gas distribution pipe (4) are connected.

2. The gas valve connection device according to claim 1, It is characterized in that The connecting end (2) is threadedly connected to a hollow joint (5) via an internal thread, the outer end of the joint (5) has a radially outward-turned shoulder (51), the union nut (3) is sleeved outside the joint (5) and the flange (31) of the union nut (3) is blocked by the shoulder (51), and the gas distribution pipe (4) is threadedly connected to the union nut (3) via an external thread.

3. The gas valve connection device according to claim 2, It is characterized in that The sealing structure comprises an annular sealing gasket (6). When the connection end (2), the union nut (3) and the gas distribution pipe (4) are fastened, the top surface of the sealing gasket (6) seals against the sealing surface of the joint (5), and the bottom surface of the sealing gasket (6) seals against the sealing surface of the gas distribution pipe (4).

4. The gas valve connection device according to claim 2, It is characterized in that The sealing structure comprises a conical hole which expands outward on the inner wall of the joint (5) towards the end of the gas distribution pipe (4), and the gas distribution pipe (4) has an insertion end which is inserted into the conical hole, and the outer wall of the insertion end is a conical surface which matches the conical hole.

5. The gas valve connection device according to claim 2, 3 or 4, It is characterized in that The outer wall of the middle part of the gas distribution pipe (4) has an external hexagonal clamping surface (41), and the outer end of the gas distribution pipe (4) has an internal thread or an external thread.

6. The gas valve connection device according to claim 5, It is characterized in that The joint (5) has a hexagonal hole.

7. The gas valve connection device according to claim 1, It is characterized in that The union nut (3) is threadedly connected to the connection end (2) via an internal thread. The union nut (3) is sleeved on the outside of the gas distribution pipe (4). The inner end of the gas distribution pipe (4) has a radially outwardly protruding convex edge (42). The retaining edge (31) of the union nut (3) abuts against the bottom surface of the convex edge (42).

8. The gas valve connection device according to claim 7, It is characterized in that The sealing structure comprises an annular sealing ring (7). When the connection end (2), the union nut (3) and the gas distribution pipe (4) are fastened, the top surface of the sealing ring (7) seals against the sealing surface of the connection end (2), and the bottom surface of the sealing ring (7) seals against the sealing surface of the gas distribution pipe (4).

9. The gas valve connection device according to claim 7, It is characterized in that The sealing structure comprises a conical hole which expands outwards on the inner wall of the connecting end (2) towards the end of the gas distribution pipe (4); the gas distribution pipe (4) has an insertion end which is inserted into the conical hole; the outer wall of the insertion end is a conical surface which matches the conical hole.

10. The gas valve connection device according to claim 7, 8 or 9, It is characterized in that The gas distribution pipe (4) has an inner hexagonal hole, and the outer end of the gas distribution pipe (4) has an inner thread or an outer thread.

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