JP2589517B2 - 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. The control unit for controlling the air amount and the raw gas amount is used for a gas burner that does not mix the combustion air and the raw gas.

(Prior art)

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 devised a device for 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 A control unit for controlling the amount of air, and an air chamber and a raw gas chamber are independently provided in the control unit, and these air chambers and the raw gas chamber are communicated with the burner unit, respectively, and The control section is provided with an operating rod so as to be able to advance and retreat, and a raw gas amount adjusting valve and an air amount adjusting valve which are opened and closed as the operating rod advances and retreats. A gas burner ratio control for operating a valve to adjust the amount of combustion air flowing into the air chamber and the amount of raw gas flowing into the raw gas chamber In the apparatus, the raw gas amount adjusting valve and the air amount adjusting valve are configured such that an annular valve seat fixed to a valve box and a valve body fixed to the operating rod are concentrically arranged, A ratio control valve device for a gas burner, wherein one of a wall surface and an outer wall surface 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.

 1 to 3 show a first embodiment.

In the figure, reference numeral 1 denotes a burner unit of the gas hot water supply apparatus, and 2 denotes a control unit for controlling the amount of raw gas supplied to the burner unit 1, the amount of primary air, and the amount of secondary 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 in the control unit 2. The outlet of a blower (not shown) is connected to the air inlet 31. 4 is an air cylinder, and a box 3
Are integrally formed on the wall surface. The inside of the air cylinder 4 constitutes the air chamber 41 of the present invention. Reference numeral 5 denotes a support cylinder, which is fitted on the side surface of the box 3. The support cylinder 5 is open in the air cylinder 4. Reference numeral 42 denotes a guide cylinder, which is integrally formed on the wall surface of the air cylinder 4. This guide tube 42
Has the same axis as the support chamber 5. Reference numeral 52 denotes a raw gas introduction path, which is formed in the support cylinder 5. The raw gas introduction path 52 guides raw gas into the case 3 from outside.
Reference numeral 6 denotes a cylindrical valve box member, which is fitted inside the support cylinder 5. The rear end of the valve box member 6 penetrates the support cylinder 5. Numeral 61 denotes a nut, which is screwed into a protruding portion of the valve box member 6 to fix the valve box member 6. 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. 62 is a shaft hole drilled at the right end (in FIG. 1) of the valve box member 6, and 7 is this shaft hole.
This is an operating rod that is inserted into 63 so as to be able to advance and retreat. This operating rod 7
Is inserted into the guide cylinder 42 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.
The opening amount of the raw gas amount control valve G is increased or decreased by the reciprocation of the operating rod 7, and the raw gas passing amount is adjusted.

Next, reference numeral 33 denotes an annular valve seat, which is formed integrally with the box 3. The valve seat 33 partitions the inside of the housing 3 into a primary air chamber 331 and a secondary air chamber 332. The inner wall surface of the valve seat 33 is tapered. Numeral 8 denotes a disc-shaped valve body, which is integrally formed on the right end of the advance / retreat rod 7. This valve element 8 constitutes a primary air amount adjusting 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 331 by increasing or decreasing the opening area of the operating rod 7 when the operating rod 7 advances and retreats.

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 to the fixed cylinder 9 so as to be able to advance and retreat, and the opening and closing area of the valve seat 33 and the valve cylinder 92 is increased or decreased by the advance or retreat. 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 is in communication with the mixing tube 15. The mixing pipe 15 communicates with the primary air chamber 331 and the raw gas chamber 332 of the control section 2. 111,111,… are burners, burner head plate 11
It is pierced. The gas outlets 111, 111,... Cause the air-fuel mixture to be blown out of the burner head plate 11. The jetted air-fuel mixture forms an internal flame L by being ignited. Reference numeral 12 denotes a secondary air pipe, which is installed above the burner head plate 11. The secondary air pipe 12 communicates with the secondary air chamber 332 of the control section 2. Reference numerals 121, 121, ... denote pores, which are bored in the secondary air pipe 12. These pores 121, 121,.
Squirting upward. 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.

The operating rod 7 is moved to the left (first
(In the figure), that is, when pushed in, the opening areas of the raw gas amount control valve G, the primary air amount control valve A, and the secondary air amount control valve B increase. For this reason, as a result of increasing the amount of raw gas, the amount of primary air, and the amount of secondary air supplied to the burner unit 1, 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. 4 shows a second embodiment.

The second embodiment is applied to a blast type burner, where 11a is a burner, and 111a is a flame outlet of the burner 11a. 16a
Is an air chamber, which is formed below the burner 11a.
The air chamber 16a is provided in the combustion air chamber 3 of the control unit 2.
Communicates with 33. Reference numeral 15a denotes a fuel pipe, and an air chamber 16a
Is formed at the top. The fuel pipe 15a communicates with the raw gas chamber 271 of the control unit 2. 151a is a nozzle formed on the fuel pipe 15a. This nozzle 151
a injects and supplies raw gas toward the burner 11a. F is a flame.

 Next, the operation of the second embodiment will be described.

Move the operating rod 7 to the right (4th
(In the figure), that is, withdrawing, the opening areas of the raw gas amount control valve G and the combustion air amount control valve C increase. Therefore, as a result of an increase in the amount of raw gas and the amount of combustion air supplied to the burner unit 1, 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.

〔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.

As described above, the gas burner ratio control valve device according to the present invention has an inner wall surface of the valve seat or an outer wall surface of the valve body in a state where the combustion air chamber and the raw gas chamber of the control unit are independent of each other. The air ratio can be adjusted only by changing the angle of the taper. As a result, it is easy to manufacture an air amount adjusting valve portion corresponding to various air ratios.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of a gas burner ratio control valve device according to the present invention. FIGS. 1 to 3 show a first embodiment, FIG. 1 is a front sectional view, FIG. Is a right side view, FIG. 3 is a plan view, and FIG. 4 is a front sectional view of the second embodiment. 1 Burner section 2 Control section 331 Primary air chamber (air chamber) 332 Secondary air chamber (air chamber) 333 Combustion air chamber (air chamber) 41 Raw gas chamber 6 … Valve box member (Valve box) ………………………………………………………………………………………………… ……………………………………………………. Volume control valve) G: Raw gas volume control valve

Claims (1)

(57) [Claims] 1. A burner unit, and a control unit for controlling the amount of raw gas and the amount of air supplied to the burner unit, wherein the control unit is provided with an air chamber and a raw gas chamber independently of each other. The air chamber and the raw gas chamber are respectively communicated with the burner section, and an operating rod is installed in the control section so as to be able to advance and retreat, and a raw gas amount control valve and an air are opened and closed in accordance with the advance and retreat of the operating rod. An amount control valve is provided, and the control rod is operated by appropriately moving the operating rod by an actuator to adjust the amount of combustion air flowing into the air chamber and to reduce the amount of raw gas flowing into the raw gas chamber. In the ratio control valve device for a gas burner to be adjusted, the raw gas amount adjustment valve and the air amount adjustment valve are fixed to an annular valve seat fixed to a valve box and the operating rod. And a valve body formed concentrically, and one of an inner wall surface of the valve seat and an outer wall surface of the valve body is formed in a tapered shape.