CN201246488Y - Gas valve with improved valve core structure - Google Patents

Abstract

The utility model discloses a gas valve with improved valve core structure, which comprises a valve body and a valve seat, a hollow rotating shaft and a valve core consisting of an outer valve core and an inner valve core, wherein the outer valve core is provided with a big fire air inlet hole and a small fire air inlet hole, the inner valve core is provided with two or more flow limiting holes respectively corresponding to different gases, when the gas is converted, a corresponding nozzle is replaced, and the inner valve core is directly rotated from the through hole of the rotating shaft by using tools such as a screwdriver and the like, so that the corresponding flow limiting holes on the inner valve core are communicated with the small fire air inlet holes on the outer valve core, the gas flow of the big fire is limited by the aperture of the nozzle, the gas flow of the small fire is limited by the corresponding flow holes on the inner valve core, the operation is convenient, the use is safe and reliable, the gas valve can be widely applied to gas cookers, gas barbecue ovens, gas water heaters and the like, so that the purpose of stable combustion of two gas sources is met.

Description

Gas valve with improved spool structure

technical field

The utility model relates to a gas valve, in particular to a gas valve with an improved valve core structure.

Background technique

Because different gases have different characteristics, their heat load, combustion potential, Wobbe number and other parameters are all different. When used on one valve, it is difficult to achieve the ideal combustion effect. Since the traditional valve can only be used for one gas source, if the gas source needs to be changed, the valve must be replaced again to achieve the purpose of stably burning another gas source on the same burner. However, such an operation will make manufacturers and users feel very inconvenient, and at the same time cause a great waste of resources. If the user replaces it by himself, there will be certain safety hazards, which will easily lead to catastrophic accidents.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides a gas valve with a simple structure and an improved valve core structure which is convenient to use.

The technical scheme that the utility model solves its technical problem adopts is:

A gas valve with an improved valve core structure, including a valve body and a valve seat, a valve core is installed in a cavity formed by the valve body and the valve seat, and the valve body is provided with an air inlet for connecting a gas source and It is used to connect the air outlet of the burner, the end of the air outlet is equipped with a nozzle, the valve core includes an outer valve core and an inner valve core installed in the outer valve core, and one end of the outer valve core is connected with an interspersed valve The rotating shaft of the seat, the end of the inner valve core close to the rotating shaft is provided with an adjusting port, and the rotating shaft is provided with a through hole communicating with the adjusting port; the inner valve core is connected with a limiting device that limits its axial movement; the outer valve core The spool is provided with a high-fire air inlet and a low-fire air inlet that can communicate with the air outlet and the air inlet, and the inner valve core is provided with two or more connected air outlets and low-fire air inlets corresponding to different gases The flow restriction hole; Wherein, the apertures of the large fire air inlet and the low fire air inlet are respectively greater than or equal to the aperture of the maximum design flow nozzle and the maximum design flow flow restriction hole.

As a further improvement of the utility model, the inner valve core is provided with four flow limiting holes located on the same circumference and distributed at 90 degrees to each other; the limiting device includes an annular limiting groove arranged on the surface of the inner valve core And the pin hole arranged radially along the outer valve core, communicating with the annular limit groove, and the limit pin inserted in the pin hole, whose front end is embedded in the annular limit groove; the surface of the outer valve core is along the direction of the pin hole. The circumferential surface is provided with a card groove, and a snap ring is installed in the card slot, and the other end of the limit pin leans against the inner side of the snap ring.

As a further improvement of the utility model, the inner spool is provided with two flow limiting holes located on the same circumference and distributed at an angle of 90 degrees; the limiting device includes a blind hole and a The through groove placed on the outer valve core and the limit pin with one end inserted into the blind hole and the other end located in the through groove, rotate the inner valve core, and the two ends of the through groove respectively block the limit pin and the corresponding micro-fire air inlet respectively. The two flow restriction holes communicate.

The beneficial effects of the utility model are: the spool of the utility model is composed of an outer spool and an inner spool installed inside the outer spool, the inner spool is connected with a limiting device that limits its axial movement, and the inner spool is set There are two or more flow restriction holes corresponding to different gases. When changing the gas, replace the corresponding nozzle and use tools such as a screwdriver to directly rotate the inner valve core from the through hole of the shaft to make the corresponding flow restriction holes on the inner valve core It communicates with the low-fire air intake hole on the outer valve core. Since the apertures of the large-fire air intake hole and the low-fire air intake hole are respectively greater than or equal to the apertures of the maximum design flow nozzle and the maximum design flow flow restriction hole, the ultimate fire control is realized. The gas flow is limited by the aperture of the nozzle, and the gas flow of low fire is limited by the corresponding flow hole on the inner valve core. It is easy to operate, safe and reliable to use, and can be widely used in gas stoves, gas grills, gas water heaters, etc. The traditional gas valve can also be transformed by replacing the valve core, rotating shaft and nozzle, so that it can meet the purpose of stable combustion of two kinds of gas sources.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the overall structural representation of the utility model;

Figure 2 is a schematic cross-sectional view of a 360-degree rotary gas valve;

Fig. 3 is a schematic diagram of an inner spool rotated at 90 degrees;

Fig. 4 is a schematic diagram of the outer spool rotated 360 degrees;

Figure 5 is an exploded view of the spool rotated 360 degrees;

Fig. 6 is a sectional view of a 360-degree rotating spool;

Figure 7 is an exploded view of the 90-degree rotating valve core;

Fig. 8 is a sectional view of a 90-degree rotating spool;

Fig. 9 is a sectional view of the A-A direction shown in Fig. 6;

Fig. 10 is a sectional view of the B-B direction shown in Fig. 8;

Figure 11 is a schematic diagram of the installation of the 90-degree rotating outer valve core and connecting piece;

Figure 12 is a schematic diagram of the valve seat.

Detailed ways

Referring to Figures 1 to 12, a gas valve with an improved valve core structure includes a valve body 1 and a valve seat 2, and a valve core is installed in the cavity formed by the valve body 1 and valve seat 2, and the valve body 1 is provided with the inlet channel 5 for connecting the gas source and the gas outlet channel 23 for connecting the burner, and the nozzle 4 is installed at the end of the gas outlet channel 23. The spool includes an outer spool 14 and an inner spool 12 installed in the outer spool 14, one end of the outer spool 14 is connected with a rotating shaft 3 inserted through the valve seat 2, the outer spool 14 and the rotating shaft 3 A spool spring 7 for resetting the rotating shaft is installed between them, and the end of the inner spool 12 near the rotating shaft is provided with an adjustment port 24, which can be a flat groove or a cross groove corresponding to a general-purpose screwdriver. A through hole 6 communicating with the adjustment port 24 is provided, and the inner valve core 12 can be directly rotated through the through hole 6 with a corresponding screwdriver during adjustment. The inner spool 12 is connected with a limiting device that limits its axial movement; the outer spool 14 is provided with a high-fire air inlet 19 and a low-fire air inlet 18 that can communicate with the air outlet 23 and the air inlet 5, The inner spool 12 is provided with two or more flow restricting holes 13 corresponding to different gases respectively, which can communicate with the gas outlet 23 and the low-fire air inlet 18; wherein, the high-fire air inlet 19 and the low-fire air inlet The apertures of 18 are all greater than or equal to the apertures of the maximum design flow nozzle 4 and the maximum design flow flow restriction hole 13 respectively, that is to say that the gas flow that can pass through the large fire intake hole 19 and the low fire intake hole 18 is respectively It is greater than or equal to the minimum design flow rate of the large fire and the minimum design flow rate of the gas supported by the gas valve.

In addition, the inner valve core 12 of the utility model is provided with an annular sealing groove 16, and a sealing ring 11 is installed in the annular sealing groove 16. After installation, both sides of the sealing ring 16 are attached to the inner wall of the outer valve core 14 to prevent gas leakage.

The high fire flow rate of the present utility model is controlled by the aperture of nozzle 4, and the low fire flow rate is controlled by the flow direction restriction hole of inner valve core 12. When using large fire, air inlet passage 5 is directly communicated with outlet passage 23 through outer valve core 14, so Can adopt big fire inlet hole 19 to be positioned at before the slight fire inlet hole, can set the axis center of big fire inlet hole 19 and the slight fire inlet hole 18 not on the same circle; It communicates with the low-flame air inlet 18 and the air inlet 5.

For ease of use, the end of the outer valve core 14 of the present utility model connected to the rotating shaft 3 is equipped with a limit piece 8, and the valve seat 2 is provided with two limit pieces 26 that limit the rotation angle of the limit piece 8, and the two limit pieces 26 Respectively corresponding big fire advances hole 19 and low fire inlet hole 18 and air intake passage 5 together.

Since the commonly used gas is mainly methane and propane, the inner spool 12 is provided with four flow restricting holes 13 that can be located on the same circle and are distributed at 90 degrees to each other. The two opposite flow restricting holes 13 have the same aperture. The device includes an annular limiting groove 17 arranged on the surface of the inner valve core 12, a pin hole 25 arranged radially along the outer valve core 14, communicating with the annular limiting groove 17, and inserted into the pin hole 25, and the front end is embedded in the annular limiting groove. The limit pin 10 in the position groove 17, the surface of the outer valve core 14 is provided with a draw-in groove 15 along the circumferential surface of the pin hole 25, and a snap ring 19 is installed in the draw-in groove 15, and the other end of the limit pin 10 tops Lean against the inner side of the snap ring 19, easy to install, and can realize the 360-degree rotation of the valve core. During use, the adjustment port 24 of the inner valve core 12 can be in the horizontal position and the vertical position to correspond to two kinds of gas.

Considering that there may be flow restriction holes 13 and low-flame inlet holes 18 not easy to align during 360-degree rotation, which will affect the combustion effect, the inner valve core 12 can also be provided with two valves located on the same circumference and distributed at an angle of 90 degrees. A flow limiting hole 13; the limiting device includes a blind hole 21 arranged on the inner valve core 12 and a through groove 20 placed on the outer valve core 14, and one end is inserted into the blind hole 21, and the other end is located in the through groove 20 The limit pin 10 rotates the inner spool 12, and the two ends of the through groove 20 respectively block the limit pin 10 and the corresponding micro-flame air inlet 18 communicates with the two flow limit holes 13 respectively, so as to facilitate the operation of switching the gas source.

When switching gas, replace the corresponding nozzle and use tools such as a screwdriver to directly rotate the inner spool through the through hole of the rotating shaft, so that the corresponding flow restriction hole on the inner spool communicates with the low-fire air inlet on the outer spool. The gas flow that can pass through the large fire inlet hole and the low fire inlet hole on the valve core is respectively greater than or equal to the minimum design flow rate of the large fire and the minimum design flow of the gas supported by the gas valve, so that the final gas flow rate of the large fire can be achieved by The aperture of the nozzle is limited, and the gas flow of the low fire is limited by the corresponding flow hole on the inner valve core. The traditional gas valve is modified by replacing the valve core, rotating shaft and nozzle, so that it can meet the purpose of stable combustion of two kinds of gas sources.

Claims (8)

1, a kind of gas valve of valve core structure improvement, comprise valve body (1) and valve seat (2), in the cavity by described valve body (1) and valve seat (2) formation spool is installed, described valve body (1) is provided with intake duct (5) that is used to connect source of the gas and the air outlet channel that is used to be connected burner (23), described air outlet channel (23) end is equipped with nozzle (4), it is characterized in that described spool comprises outer spool (14) and is installed on the interior inner spool (12) of outer spool (14), one end of described outer spool (14) is connected with the rotating shaft (3) of interspersed valve seat (2), described inner spool (12) is provided with adjusting mouth 1 (24) near an end of rotating shaft, and described rotating shaft (3) is provided with and is communicated with the through hole (6) of regulating mouthful (24); Described inner spool (12) is connected with the limit stoper that limits its axial motion; Described outer spool (14) is provided with the big fire inlet hole (19) and the low baking temperature inlet hole (18) that can be communicated with air outlet channel (23) and intake duct (5), and described inner spool (12) is provided with two and the above flow restriction hole (13) that is communicated with air outlet channel (23) and low baking temperature inlet hole (18) of corresponding different combustion gas respectively; Wherein, the aperture of described big fire inlet hole (19) and low baking temperature inlet hole (18) is respectively more than or equal to the aperture in design maximum flow nozzle (4) and design maximum flow flow restriction hole (13).

2, the gas valve of valve core structure improvement according to claim 1 is characterized in that described inner spool (12) is provided with annular seal groove (16), is equipped with seal ring (11) in the annular seal groove (16).

3, the gas valve of valve core structure improvement according to claim 1, the axle center that it is characterized in that described big fire inlet hole (19) and low baking temperature inlet hole (18) is not on same circumference; Described outer spool (14) surface is provided with the axial notch (22) that can be communicated with low baking temperature inlet hole (18) and intake duct (5).

4, the gas valve of valve core structure improvement according to claim 1 is characterized in that between described outer spool (14) and the rotating shaft (3) valve core spring (7) being installed.

5, the gas valve of valve core structure improvement according to claim 1, an end that it is characterized in that described outer spool (14) connection rotating shaft (3) is equipped with banking stop (8), and described valve seat (2) is provided with two limiting stoppers (26) of restriction banking stop (8) rotation angle.

6,, it is characterized in that described inner spool (12) is provided with four the flow restriction holes (13) that are positioned on the same circumference, are mutually 90 degree distributions according to the gas valve of the arbitrary described valve core structure improvement of claim 1 to 5; Described limit stoper comprise the annular stop groove (17) that is arranged at inner spool (12) surface and along outer spool (14) radially be provided with, be communicated with the pin-and-hole (25) of annular limited impression (17) and insert in the pin-and-hole (25), front end is embedded in the interior position limit pin (10) of annular stop groove (17).

7, the gas valve of valve core structure improvement according to claim 6, the surface that it is characterized in that described outer spool (14) is provided with draw-in groove (15) along the circumferential surface of pin-and-hole (25), snap ring (19) is installed in the draw-in groove (15), and the other end of described position limit pin (10) leans in snap ring (19) inboard.

8,, it is characterized in that described inner spool (12) is provided with two the flow restriction holes (13) that are positioned on the same circumference, become 90 degree angles to distribute according to the gas valve of the arbitrary described valve core structure improvement of claim 1 to 5; Described limit stoper comprises the blind hole (21) that is arranged on the inner spool (12) and places a groove (20) and an end on the outer spool (14) to insert the position limit pin (10) that blind hole (21) is interior, the other end is positioned at groove (20), rotate inner spool (12), the two ends of groove (20) are blocked the corresponding low baking temperature inlet hole of position limit pin (10) (18) respectively and are communicated with two flow restriction holes (13) respectively.

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