JPH025246Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a gas control valve used in gas water heaters and the like.

[Conventional technology]

Conventionally, as a gas control valve that automatically controls the amount of supplied gas in conjunction with a hydraulic response device, an automatic hydraulic gas valve V ₁ and a gas proportional valve V ₂ are provided integrally, as shown in FIG. Therefore, if dirt or the like gets caught between the gas proportional valve V ₂ and its valve seat 1 and does not return, the hydraulic gas automatic valve V ₁ integrated therewith will not close and there is a risk of gas leakage. Also, for example, when converting from 6B gas to 13A gas, conventional gas conversion means are not provided as shown in Figure 3.
Generally, this problem is dealt with by replacing the gas control valve, but in this case, the seal part as well as the valve cover must be removed, and the complexly assembled flasher also needs to be disassembled.

[The problem that the idea aims to solve]

The above-mentioned conventional technology has problems in terms of safety, requires a great deal of effort and advanced technology for gas conversion work, and has many economic disadvantages. Therefore, the present invention provides a gas control valve that is extremely safe in use, allows gas conversion to be performed with a simple operation, and is also economically superior.

[Means to solve the problem]

In order to solve the above problems, this invention was developed as an automatic hydraulic gas valve that automatically opens and closes in response to water pressure.
V ₁ and a gas proportional valve V ₂ that proportionally controls the gas amount in conjunction with the opening/closing operation of the automatic hydraulic gas valve V ₁ are installed separately in the valve housing A, and the valve of the gas proportional valve V ₂ is installed separately in the valve housing A. A seat 1 is provided to be slidable in the axial direction by a constant stroke l, a valve cover 3 provided at an end of the valve housing A is screwed to the valve seat 1, and the hydraulic gas automatic valve V ₁ and the gas proportional valve are connected to each other by screws. Between valve V ₂ and gas proportional valve V ₂
This is a technical means in which springs are interposed between the valve cover 3 and the valve cover 3 to allow both valves to slide freely in the axial direction.

[Effect]

Therefore, hydraulic gas automatic valve V ₁ and gas proportional valve V ₂
are equipped to be able to operate together or separately, so even if dirt or the like gets caught between the gas proportional valve V ₂ and its valve seat 1 and the gas proportional valve V ₂ does not return, the water pressure will be maintained. Automatic gas valve V ₁ alone closes the return gas passage, so there is no risk of gas leakage, and automatic hydraulic gas valve V ₁ and gas proportional valve V ₂ work together to ensure accurate gas control. Proportional control of the amount of gas supplied and the amount of water supplied can be performed stably at all times. Furthermore, if the valve cover 3 is rotated to the right or left by a certain angle, the valve seat 1 of the gas proportional valve _V2 is screwed together with the valve cover 3, so that the valve seat 1 is rotated in advance by the screw action. determined constant stroke l
Since the relative position of the gas proportional valve V ₂ with respect to the valve seat 1 is changed by reliably moving forward and backward, and the opening area (throttling amount) is changed to a large or small amount, a gas amount suitable for, for example, 6B gas or 13A gas can be obtained. It is something that can be done.

〔Example〕

An embodiment of the gas control valve according to this invention will be described below with reference to the drawings.

In FIGS. 1 and 2, A is a valve housing, which is interposed in the gas passage. V ₁ is an automatic hydraulic gas valve that operates in conjunction with a hydraulic response device (not shown) installed in the water supply channel, and a gas proportional valve V ₂ that proportionally controls the gas amount in conjunction with the opening and closing operations of the automatic hydraulic gas valve V _{1 .} It is installed in the valve casing A in association with the valve so that it can move together or separately. That is, the protrusion 4 provided on one side of the center of the automatic hydraulic gas valve V ₁ is loosely fitted into the recess 5 provided on one side of the center of the gas proportional valve V ₂ to connect them while maintaining the same axis, and , hydraulic gas automatic valve V ₁ and gas proportional valve V ₂
A spring 6 is interposed between them to urge them apart, and a spring 7 having a stronger spring force than the spring 6 is provided between the gas proportional valve V ₂ and the valve cover 3 provided at the end of the valve housing A. By interposing them and urging them in a direction that narrows the opening area, they are elastically connected and held, allowing them to move together as well as separately. The automatic hydraulic gas valve V ₁ faces a valve seat 8 integrally formed in the valve housing A, and is connected to a hydraulic response device via its valve shaft 9, so that the automatic hydraulic gas valve V ₁ A gas proportional valve is created by moving toward and away from the valve seat 8 in response to the water supply pressure together with the proportional valve _V2 .
Coupled with the control action of V ₂ , the amount of gas supplied to the burner is automatically controlled in proportion to the amount of water supplied to the heat exchanger, and the supply of gas is automatically controlled in proportion to the amount of water supplied to the heat exchanger.
It has also become possible to perform both cutting and cutting. Reference numeral 10 denotes a support shaft provided in the gas proportional valve V ₂ , which is slidably and loosely fitted into a support hole 11 provided in the valve cover 3 described later, so that the hydraulic gas automatic valve V ₁ moves linearly forward and backward. ing. In addition, 1 is the valve seat of the gas proportional valve V ₂ ,
It is formed into a short cylindrical shape and is fitted into the valve housing A so that it can freely slide in the direction of the valve shaft. The rotation of the valve seat 1 is regulated by inserting the valve seat 1 into the valve seat 1. 14 is the sealing material. Reference numeral 3 denotes a valve cover of the valve housing A, which is rotatably provided in the opening 2 of the valve housing A via a sealing material 15, and has a square head (for example, a hexagonal head) 16 for rotation operation at the center outer side thereof. The square head 16 of the valve cover 3 is integrally formed, and a male thread 17 is formed on the inner end and is screwed into a female thread 18 formed on the valve seat 1 to screw the valve cover 3 and the valve seat 1 together. By rotating the valve cover 3 by a certain angle to the right or left using a tool such as a wrench, the valve seat 1 whose rotation is regulated by the pin 12 is linearly moved by a predetermined constant stroke l. The positional relationship of the gas proportional valve V ₂ with respect to the valve seat 1 is shown in Figure 1 (valve seat 1 is at the right extreme position) and Figure 2 (valve seat 1 is at the left extreme position). By changing the opening area, it is possible to convert from 6B gas to 13A gas, for example. 19 is a retaining ring of the valve lid 3. Note that if the stroke 1 of the valve seat 1 is regulated by the engagement step 20 of the valve housing A and the engagement step 21 of the valve lid 3, the stroke 1 can be kept constant. 22 is a guide body for the valve shaft 9 of the automatic hydraulic gas valve _V1 , 23 is a return spring of the automatic hydraulic gas valve _V1 , and 24 is a switch dock. Also,
25 is a gas inlet of the valve housing A, and 26 is a gas outlet.

[Effect of idea]

As explained above, this invention separates the hydraulic gas automatic valve V ₁ and the gas proportional valve V ₂ and relates them so that they can operate together or separately, so that the gas proportional valve V ₂
Even if the automatic hydraulic gas valve V ₁ stops working due to debris getting stuck in it, the automatic hydraulic gas valve V 1 will operate independently and reliably stop the gas supply, thereby preventing unexpected accidents such as gas leaks and significantly increasing safety. It also has the effect of hydraulic gas automatic valve V ₁ and gas proportional valve
_V2 works together to perform accurate gas control, and proportional control of the amount of gas supplied and the amount of water supplied can be performed stably at all times. Furthermore, valve seat 1 of gas proportional valve V ₂
A predetermined constant stroke with simple operation
Since gas conversion can be performed by moving forward and backward, for example, it is possible to convert from 6B gas to 13A gas without replacing the functional parts, which not only improves economic efficiency, but also requires special technology to perform the conversion work. It has the effect that many people can easily perform it without requiring any training.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing one embodiment of the gas control valve according to this invention, and FIG. 3 is a cross-sectional view of a conventional example. A... Valve housing, V ₁ ... Hydraulic gas automatic valve, V ₂ ...
Gas proportional valve, 1... Valve seat, l... Stroke, 2... Opening, 3... Valve cover.

Claims (1)

[Scope of utility model registration request] A hydraulic gas automatic valve V ₁ that automatically opens and closes in response to water pressure, and a gas proportional valve V ₂ that proportionally controls the gas amount in conjunction with the opening and closing operations of the hydraulic gas automatic valve V ₁ are installed in the valve housing A. Equipped as a separate body, said gas proportional valve V ₂
A valve seat 1 is provided so as to be slidable in the axial direction by a constant stroke l, and a valve cover 3 provided at an end of the valve housing A is screwed to the valve seat 1, and the hydraulic gas automatic valve V ₁ and the Gas proportional valve _V2 and gas proportional valve
A gas control valve characterized in that a spring is interposed between each valve V ₂ and a valve cover 3 so that both valves can freely slide in the axial direction.