CN201166154Y - Dual air source plug valve - Google Patents

Abstract

A double gas source plug valve, which belongs to a gas appliance, mainly includes a valve body (1), a valve cover (2), an upper valve stem (3) and a valve core (4), and the valve cover (2) is installed on the valve On the body (1), the upper valve stem (3) passes through the valve cover (2) and is connected with the valve core (4) installed in the valve body (1). It is characterized in that the valve body (1) is provided with The natural gas inlet (5) and the liquefied gas inlet (6) and the natural gas outlet (7) and the liquefied gas outlet (8) that are all communicated with the valve cavity; Or the arc-shaped convex section (9) of the liquefied gas inlet (6), has an air outlet (10) at the main body center of the valve core (4), and has an air outlet (10) on the main body wall of the valve core (4). 10) A connected gas outlet (11), the gas outlet (11) communicates with the natural gas outlet (7) or the liquefied gas outlet (8) on the valve body (1). The utility model simplifies the gas supply structure of the gas appliance with dual gas sources, further improves the safety, and has a simple structure.

Description

Dual air source plug valve

technical field

The utility model relates to a gas appliance, such as a gas oven, a gas cooker, etc., in particular to a necessary part of a dual gas source gas appliance, specifically a dual gas source cock valve.

Background technique

As we all know, general gas appliances such as gas ovens, stoves and other commonly used gas sources include natural gas and liquefied petroleum gas. Because the calorific value of the two types of gas is different, the nozzle structure is also different during specific use. For this reason, the existing gas appliances In order to make the same appliance use both natural gas and liquefied petroleum gas, improvements have been made in pressure reducing valves and nozzles, and dual gas source nozzles have been designed, which can basically meet the use requirements when the gas source is connected correctly. , the commonly used method in the selection of gas supply is to realize the selection and use of the gas source through the switching valve and the control valve, but if the switching valve is used to select the wrong gas source, it may cause a fire easily because the flame is too high, and there are installation hazards. At the same time, it is also more complicated in structure. Therefore, there is an urgent need to design a cock valve installed on the dual gas source gas circuit, so that the gas appliance can only work under the selected gas source state, that is, if the set working gas source is natural gas, the valve is screwed to the back of the natural gas. Only through natural gas, the LPG inlet is automatically closed and vice versa. And as far as the applicant knows, there is no relevant product available for use at present.

Contents of the invention

The purpose of the utility model is to design a double-gas-source cock valve for the urgent need of a safety gas-supply valve for a dual-gas-source gas appliance.

The technical scheme of the utility model is:

A dual air source plug valve mainly includes a valve body 1, a valve cover 2, an upper valve stem 3 and a valve core 4. The valve cover 2 is installed on the valve body 1, and the upper valve stem 3 passes through the valve cover 2 and is installed on the valve body. The valve core 4 in the body 1 is connected, and it is characterized in that the valve body 1 is provided with a natural gas inlet 5, a liquefied gas inlet 6, a natural gas outlet 7 and a liquefied gas outlet 8, which are all communicated with the valve cavity; 4 is provided with an arc-shaped protruding section 9 for blocking the natural gas inlet 5 or liquefied gas inlet 6, an air outlet 10 is opened in the center of the main body of the valve core 4, and an air outlet 10 is opened on the main body wall of the valve core 4 to communicate with the air outlet 10. The gas outlet channel 11 communicates with the natural gas outlet 7 or the liquefied gas outlet 8 on the valve body 1 .

A solenoid valve 12 is installed in the valve body 1, and the upper end step surface of the solenoid valve 12 is offset against the inlet end of the air outlet hole 10 on the valve core 4; the upper valve stem 3 is connected with a lower valve stem 13, and the lower valve stem 13 One end of the rod 13 passes through the valve core 4 and contacts the solenoid valve 12 , and a spring 14 is sleeved on the lower valve rod 13 .

A sealing gasket 15 is installed between the upper end step surface of the solenoid valve 12 and the inlet end of the air outlet hole 10 on the valve core 4 .

The beneficial effects of the utility model:

1. Combining the functions of the gas source switching valve and the control valve, one valve is reduced, the gas circuit is simplified, and the cost is saved while reducing the safety hazard of the system.

2. The valve of this utility model will automatically close the other air path during use, eliminating the potential safety hazards in the dual air source system (Note: In the dual air source system, if there is no such function in the system, when human error occurs, That is, when the gas source is LP, but the valve is controlled at NG, the gas will burn through the NG nozzle, and the flame will be very high, which is easy to cause a fire).

3. According to the needs, the solenoid valve in the plug valve can be selectively installed.

4. The utility model also has the advantages of simple structure, small volume and convenient use.

Description of drawings

Fig. 1 is a schematic diagram of the external structure of the utility model.

Fig. 2 is a schematic diagram of the cross-sectional structure along line A-A of Fig. 1 .

Fig. 3 is a three-dimensional structural schematic view of the valve core of the present invention.

Fig. 4 is a working principle diagram when the solenoid valve is installed on the spool of the utility model.

Fig. 5 is a working principle diagram when the valve core of the utility model is not equipped with a solenoid valve.

Among Fig. 4, Fig. 5: 16 is a thermocouple, 17 is a dual gas source nozzle, 18 is a burner, and 19 is a cock valve of the present utility model.

Detailed ways

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

Embodiment one.

As shown in Figures 1, 2, 3, and 4.

A dual air source plug valve mainly includes a valve body 1, a valve cover 2, an upper valve stem 3 and a valve core 4. The valve cover 2 is installed on the valve body 1, and the upper valve stem 3 passes through the valve cover 2 and is installed on the valve body. The spool 4 in the body 1 is connected, as shown in Figures 1 and 2, the valve body 1 is provided with a natural gas inlet 5, a liquefied gas inlet 6, a natural gas outlet 7 and a liquefied gas outlet 8, which are all communicated with the valve cavity; The valve core 4 is provided with an arc-shaped convex section 9 for blocking the natural gas inlet 5 or the liquefied gas inlet 6, and an air outlet hole 10 is opened in the center of the main body of the valve core 4, and an air outlet hole is opened on the main body wall of the valve core 4. 10 communicates with the gas outlet 11, the gas outlet 11 communicates with the natural gas outlet 7 or the liquefied gas outlet 8 on the valve body 1, as shown in FIG. 3 . A solenoid valve 12 is installed in the valve body 1, and the upper end step surface of the solenoid valve 12 is opposed to the inlet end of the air outlet hole 10 on the valve core 4; the upper valve stem 3 is connected with a lower valve stem 13, and the lower valve stem 13 One end passes through the valve core 4 and resists the electromagnetic valve 12, and a spring 14 is also sleeved on the lower valve stem 13. A sealing gasket 15 is installed between the upper end step surface of the solenoid valve 12 and the inlet end of the air outlet hole 10 on the valve core 4 .

The working principle of this embodiment is:

As shown in Figure 4, after the two kinds of gas sources pass through the corresponding pressure-stabilizing valves respectively, they are respectively inserted from the corresponding inlets of the plug valve 19 of the present utility model, and the two kinds of gas outlets on the valve body are respectively connected to the dual gas source nozzles 17. The upper corresponding inlet is connected, the solenoid valve 12 in the valve body is connected with the thermocouple 16, and the sensing end of the thermocouple 16 is placed next to the burner 18, and the flame generated when the burner 18 is working can touch the sensing end of the thermocouple 16, thereby Make the thermocouple 16 generate a certain electromotive force.

After the gas circuit and circuit are connected, if natural gas is used, the upper valve stem 3 is rotated along the natural gas direction to the ignition position. When rotating, the upper valve stem 3 drives the valve core 4 to rotate. When in the ignition position, the valve The core 4 will close the liquefied petroleum gas (LP) inlet 6, and make the natural gas (NG) inlet 5 conduction. At the same time, the gas outlet 11 on the valve core 4 communicates with the natural gas NG outlet 7, and the liquefied petroleum gas LP outlet 8 is closed. At this time, press the upper valve stem 3 and hold it, the upper valve stem 3 will press down the solenoid valve 12 through the lower valve stem 13, and the whole natural gas path will be conducted. Ignition causes burner 18 to ignite which causes thermocouple 16 to generate an electromotive force. The generated electric current will make the solenoid valve 12 pull in. At this time, if you let go of your hand, the whole machine will keep working. If you want to change the firepower of the burner 18, you can then turn the upper valve stem 3 to drive the air outlet hole 10 on the valve core 4 and the hole on the valve body 1. The coincidence degree of the natural gas outlet 7 is used to change the size of the air flow in the gas path.

After the gas circuit and circuit are connected, if liquefied gas (LP) is used, turn the upper valve stem 3 to the ignition position along the LP direction. When turning, the upper valve stem 3 drives the valve core 4 to rotate, and the , the spool 4 will close the NG inlet 5, and then the LP inlet 6 will be conducted. At the same time, the air outlet holes 10 and 11 on the spool 4 will communicate with the LP outlet 8, while the NG outlet 7 will be closed. The operation process is the same as above.

If the burner 18 is extinguished in an unexpected situation, the thermocouple 16 will no longer generate an electromotive force, the solenoid valve 12 will be disengaged due to the loss of current, and the film (gasket 15) at the end of the solenoid valve 12 will close the entire gas path, so that The gas does not leak out, which plays the role of "flame out protection".

Embodiment two.

As shown in Figures 1, 2, 3, and 5.

The difference between this embodiment and the first embodiment is that the solenoid valve 12 is not installed in the valve body 1, and the thermocouple is not installed near the burner during use, and accordingly there is no flameout protection function, but its structure is relatively simple and the cost is low , and the rest are exactly the same as in Example 1.

The parts not involved in the utility model are all the same as the prior art or can be realized by adopting the prior art.

Claims (3)

1. A dual air source plug valve mainly includes a valve body (1), a valve cover (2), an upper valve stem (3) and a valve core (4), and the valve cover (2) is installed on the valve body (1) , the upper valve stem (3) passes through the valve cover (2) and is connected with the valve core (4) installed in the valve body (1), and it is characterized in that the valve body (1) is equipped with Natural gas inlet (5) and liquefied gas inlet (6) and natural gas outlet (7) and liquefied gas outlet (8); Described spool (4) is provided with for blocking natural gas inlet (5) or liquefied gas inlet ( 6) The arc-shaped convex section (9) has an air outlet (10) in the center of the main body of the valve core (4), and an air outlet communicating with the air outlet (10) is opened on the main body wall of the valve core (4). Road (11), the outlet channel (11) communicates with the natural gas outlet (7) or liquefied gas outlet (8) on the valve body (1). 2. The dual air source plug valve according to claim 1, characterized in that a solenoid valve (12) is installed in the valve body (1), and the upper end step surface of the solenoid valve (12) and the valve core (4) The inlet end of the upper air outlet hole (10) is offset; the upper valve stem (3) is connected with the lower valve stem (13), and one end of the lower valve stem (13) passes through the valve core (4) and the solenoid valve (12 ) offset, also sleeved with spring (14) on the lower valve stem (13). 3. The dual air source plug valve according to claim 2, characterized in that a gasket is installed between the upper end step surface of the solenoid valve (12) and the inlet end of the air outlet hole (10) on the valve core (4) (15).

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