JP2628321B2 - Ratio control valve device for gas burner - Google Patents

Description

The present invention relates to a ratio control valve used in a gas burner and controlling the amount of air and raw gas supplied to the burner.

[Conventional technology]

In order to perform complete combustion in the gas burner, it is necessary to secure an optimal ratio between the raw gas amount and the air amount.

Here, this ratio is different in the case of large combustion and in the case of small combustion, in order to prevent the lift and backfire of the flame.

The inventor has already devised a method of adjusting the ratio between the amount of air and the amount of raw gas by a control unit of a gas burner, and has already filed an application.

[Problems of the prior art]

However, in the conventional control device adjusting device, the air amount control valve slides a pair of stacked cylinders,
The air amount has been adjusted by increasing or decreasing the open area of the cutout of the cylindrical body.

For this reason, when changing the air ratio, the area of the notch must be adjusted, and as a result, there is a disadvantage that it is difficult to manufacture the air amount adjusting valve.

(Structure of the Invention) [Means for Solving the Problems] The present invention has been made to solve the above-mentioned disadvantages, and has a burner section, a raw gas amount supplied to the burner section, and And a control unit for controlling the amount of air, and an air chamber and a raw gas chamber are provided in the control unit, and the air chamber and the raw gas chamber are respectively communicated with the burner unit. The operating rod is provided so as to be able to move forward and backward, and a raw gas amount adjusting valve and an air amount adjusting valve which are opened and closed in accordance with the moving of the operating rod are provided. A ratio control valve device for a gas burner that adjusts an amount of combustion air flowing into the air chamber and adjusts an amount of raw gas flowing into the raw gas chamber. The raw gas control valve and the air control valve are arranged concentrically with an annular valve seat fixed to a valve box and a valve body fixed to the operating rod, and the inner wall surface of the valve seat or the A ratio control valve device for a gas burner, characterized in that one of the outer wall surfaces of the valve body is formed in a tapered shape.

[Function of the invention]

The gas burner ratio control valve device according to the present invention is configured as described above. That is, in configuring the raw gas amount adjustment valve and the air amount adjustment valve, an annular valve seat fixed to a valve box And the valve body fixed to the operating rod is arranged concentrically, and either the inner wall surface of the valve seat or the outer wall surface of the valve body is formed in a tapered shape, so that the inner wall surface of the valve seat or The air ratio can be adjusted only by changing the angle of the taper of the outer wall surface of the valve body.

[Explanation of Example]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

 FIG. 1 shows the first embodiment.

In FIG. 1, reference numeral 1 denotes a burner portion of a gas hot water supply device,
A control unit 2 controls the amount of raw gas supplied to the burner unit 1 and the amount of secondary air of the amount of primary air. The burner unit 1 and the control unit 2 are integrally formed with a box 3 interposed therebetween.

 Next, the control unit 2 will be described.

An air inlet 31 is formed integrally with the control unit 2. The air inlet 31 has an outlet 41 of the blower 4.
Are connected. Reference numeral 5 denotes a support cylinder, which is fitted on the side surface of the box 3. This support cylinder 5 opens into the box 3,
The inside functions as a raw gas chamber 51. Reference numeral 52 denotes a raw gas introduction path, which is formed in the support cylinder 5. The raw gas introduction passage 52 guides the raw gas into the raw gas chamber 51 from the outside. Reference numeral 6 denotes a cylindrical valve box member, and the support cylinder 5 is fitted therein. The rear end of the valve box member 6 penetrates the support cylinder 5. Numeral 61 denotes a nut, which is screwed into the projecting portion of the valve box member 6, and fixes the valve box member 6 by a so-called double nut structure. Reference numeral 62 denotes an annular valve seat, which is fixed to the distal end of the valve box member 6. The function of the valve seat 62 will be described later. Reference numeral 62 denotes a shaft hole formed in the right end (in FIG. 1) of the valve box member 6, and reference numeral 7 denotes an operating rod which is inserted into the shaft hole 63 so as to be able to advance and retreat. Reference numeral 71 denotes a valve body, which is formed integrally with the operating rod 7. The outer wall surface of the valve body 71 is formed in a tapered shape, and together with the annular valve seat 62, constitutes a raw gas amount control valve G of the present invention. This raw gas amount control valve G
The opening / closing area of the operating rod 7 is increased or decreased by moving the operating rod 7 forward and backward, and the passing amount of raw gas is adjusted.

Next, reference numeral 32 denotes a partition wall, which is fixed to the box 3. The partition 32 divides the inside of the box 3 into a primary air chamber 321 and a secondary air chamber 322. Reference numeral 33 denotes an annular valve seat, which is fitted to the partition wall 32. The inner wall surface of the valve seat 33 is tapered. Reference numeral 8 denotes a reciprocating tube, which is fitted in the supporting tube 6 so as to be able to reciprocate. The reciprocating cylinder 8 is fixed to the left end of the operating rod 7 and reciprocates based on the reciprocating of the operating rod 7. 81
Is a disc-shaped valve element, which is integrally formed on the right end of the advance / retreat cylinder 8. The valve element 81 constitutes a primary air control valve A together with the valve seat 33. The primary air amount control valve A adjusts the amount of primary air flowing into the primary air chamber 321 by increasing or decreasing the opening area of the operating rod 7 when the operating rod 7 advances and retreats. Also, 811
Denotes a raw gas ejection path, which is formed radially on the valve body 81. The raw gas ejection passage 811 communicates the inside of the advance / retreat cylinder 8 with the primary air chamber 321 and ejects the raw gas into the primary air chamber 321. The raw gas flowing into the primary air chamber 321 is
Mix with primary air in 21.

Next, 9 is a fixed cylinder, which is fixed to the box 3.
The fixed cylinder 9 partitions the inside of the box 3 into a compressed air chamber 91 and the secondary air chamber 322. 92 is a valve cylinder, and a connecting piece 9
It is formed integrally with the protruding portion of the valve body 81 via 11.
The valve cylinder 92 is fitted inside the fixed cylinder 9 so as to be able to advance and retreat, and by moving forward and backward, the opening area between the partition wall 32 and the valve cylinder 92 is increased or decreased. That is, the valve cylinder 92 and the fixed cylinder 9 constitute the secondary air amount control valve B of the present invention, and adjust the amount of secondary air flowing into the secondary air chamber 322 in accordance with the reciprocation of the operating rod 7. Note that 9
21 is a return spring for returning the operating rod 7 to its original state.

 Further, the burner unit 1 will be described.

In the figure, 11 is a burner head plate. This burner headboard
The inside of 11 communicates with the primary air chamber 321 of the control unit 2. Reference numerals 111, 111,... Denote flame outlets, which are formed in the burner head plate 11. This flame outlet 111,111,…
Squirt outside. The jetted air-fuel mixture forms an internal flame L by being ignited. 12 is a secondary air pipe,
It is installed above the burner head plate 11. This secondary air pipe
Reference numeral 12 communicates with the secondary air chamber 322 of the control section 2. Reference numerals 121, 121, ... denote pores, which are bored in the secondary air pipe 12. These small holes 121, 121,... Eject secondary air above the inner flame L. The jetted secondary air assists the combustion of the air-fuel mixture and forms an outer flame H above the inner flame L. Reference numeral 13 denotes a heat exchanger, which is installed above the outer flame H. This heat exchanger 13 heats the water and turns it into hot water.

 Next, the operation of this embodiment will be described.

When the operating rod 7 is moved to the left by an appropriate actuator, that is, pushed in, the opening areas of the raw gas amount adjusting valve G, the primary air amount adjusting valve A, and the secondary air amount adjusting valve B increase. For this reason, the amount of air-fuel mixture and the secondary air supplied to the burner unit 1 increase, so that the amount of combustion heat of the burner unit 1 increases. When the operation of the actuator is completed, the operating rod 7 returns to the original state by the action of the return spring 921.

 FIG. 2 shows a second embodiment.

In the second embodiment, the support cylinder 5 and the valve seat 33 of the primary air amount adjusting valve A are formed integrally with the box 3. In this embodiment, the valve 71 of the raw gas control valve G and the valve 81 of the primary air control valve A are in contact with each other while the operating rod 7 is in contact with each other.
And is sandwiched between the locking pin 711 and the compression spring 712.

 FIG. 3 shows a third embodiment.

In the third embodiment, the tapered surfaces of the valve seat 81 of the primary air flow control valve A and the valve body 71 of the raw gas flow control valve G have a gradient opposite to that of the first and second embodiments. For this reason, the operating rod 7
Has moved to the right, that is, when it has been pulled out, the opening areas of the raw gas control valve G, the primary air control valve A, and the secondary air control valve B increase.

 FIG. 4 shows a fourth embodiment.

In the fourth embodiment, the outer wall surface of the valve element 81 of the secondary air amount adjusting valve B is tapered.

When the operating rod 7 is fixed to the valve body 81 and moves rightward (in the direction of the arrow), the raw gas amount control valve G, the primary air amount control valve A, and the secondary air amount control valve B are opened.

 FIG. 5 shows a fifth embodiment.

In the fifth embodiment, the gas inlet pipe 521 and the operating rod 7 are
Through the blower tube. In this embodiment, when the operating rod 7 is moved upward, that is, pushed, the raw gas amount control valve G, the primary air amount control valve A, and the secondary air amount control valve B are opened.

In the above embodiment, the actuator used is operated by, for example, a change in water pressure, water temperature or the like of water supplied to the heat exchanger.

〔The invention's effect〕

The gas burner ratio control valve device according to the present invention is configured as described above. That is, in configuring the raw gas amount adjustment valve and the air amount adjustment valve, an annular valve seat fixed to a valve box And the valve body fixed to the operating rod is arranged concentrically, and either the inner wall surface of the valve seat or the outer wall surface of the valve body is formed in a tapered shape, so that the inner wall surface of the valve seat or The air ratio can be adjusted only by changing the angle of the taper of the outer wall surface of the valve body.

Therefore, if this gas burner ratio control valve device is used, it is easy to manufacture an air amount adjusting valve portion corresponding to various air ratios.

[Brief description of the drawings]

The drawings show an embodiment of a gas burner ratio control valve device according to the present invention. FIG. 1 is a sectional view of the first embodiment, FIG. 2 is a sectional view of the second embodiment, and FIG. FIG. 4 is a sectional view of the fourth embodiment, and FIG. 5 is a sectional view of the fifth embodiment. 1 Burner section 2 Control section 321 Primary air chamber (air chamber) 322 Secondary air chamber (air chamber) 51 Raw gas chamber 6 Valve member (valve box) 7 Actuating rod 33,62,9… Valve seat 71,81,92… Valve A …… Primary air flow control valve (air flow control valve) B …… Secondary air flow control valve (air flow control valve) G …… Raw gas control valve

Claims (2)

(57) [Claims] 1. A burner section, and a control section for controlling an amount of raw gas and an amount of air supplied to the burner section, wherein the control section is provided with an air chamber and a raw gas chamber. And a raw gas chamber communicating with the burner section, and an operation rod is installed in the control section so as to be able to advance and retreat, and a raw gas amount adjustment valve and an air amount adjustment valve which are opened and closed with the advancement and retraction of the operation rod. A gas for adjusting the amount of combustion air flowing into the air chamber and adjusting the amount of raw gas flowing into the raw gas chamber by operating the control valve by moving the operating rod forward and backward by an appropriate actuator. In the burner ratio control valve device, the raw gas amount adjusting valve and the air amount adjusting valve each include an annular valve seat fixed to a valve box and a valve body fixed to the operating rod. A ratio control valve device for a gas burner, wherein one of an inner wall surface of the valve seat and an outer wall surface of the valve element is tapered. 2. The patent according to claim 2, wherein said air chamber comprises a primary air chamber and a secondary air chamber, and said air amount control valve comprises a primary air amount control valve and said secondary air amount control valve. The ratio control valve device for a gas burner according to claim 1.