JPS6021291B2 - Capacity switching type gas combustion device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a switching capacity gas combustion device.

It has gas burners of different sizes and calorific values, and by selectively operating the gas valves that open and close the gas distribution piping to each gas burner, the calorific value can be graded into large, small, high, medium, small, etc. Conventionally, when switching the capacity (calorific value) from high to low in gas combustion equipment, the gas flow rate decreases step by step, so if the calorific value is small, it will be changed to high or low. Compared to the case of medium calorific value, the pressure loss in the gas passage is reduced. Therefore, when the calorific value is small, the nozzle pressure of the burner is higher than when the calorific value is large (medium), and the ratio of the small calorific value to the large (medium) calorific value is larger than the predetermined value. There was a problem that an imbalance occurred in the values of the calorific value of large, medium, small, etc., making it impossible to obtain a predetermined calorific value ratio. The present invention provides a capacity switching type gas combustion device that allows correction of such imbalance. One embodiment will be described below based on the drawings. In FIGS. 1 and 2, a gas supply pipe 1, gas distribution pipes 7 and 4 to a large calorific value gas burner 3, and a gas distribution pipe to the calorific value gas burner 4 are shown. A switching device 2 is interposed between the switching device 2 and the electromagnet M, which operates the gas valve 5 for the large calorific value gas burner for supplying and disconnecting gas to the large calorific value gas burner 3, and the electromagnet 4. An electromagnet M2 is provided to operate the gas valve 6 for the small calorific value gas burner for supplying and disconnecting gas to the gas burner 4, and each electromagnet M. , by operating the ground to selectively open and close the gas valves 5 and 6 for large and small calorific value gas burners as appropriate, and selectively ignite and extinguish the large calorific value gas burner 3 and the small calorific value gas burner 4. The structure allows switching of the amount of heat generated.

The switching device 2 includes a box A, as shown in detail in FIG.
A gas inlet pipe 9 to which the tip end port la of the gas supply V supply pipe 1 is connected inside and a gas distribution pipe 7 to the large calorific value gas burner 3 are arranged inside and outside the vehicle with almost the same axis line, and the base end of each Open□
ga, 7a adjacent to the inside of the box A, and the proximal entrances 9a, 7a.
A gas valve 5 for a large calorific value gas burner, which is moved up and down by an electromagnet M, is installed directly above the gas valve 5 so as to be able to move vertically, and both base ends closed 9a, 7.
a can be opened and closed at the same time, and a small hole 10 is provided in the gas valve 5 for the large calorific value gas burner, and when the gas valve 5 for the large calorific value gas burner is opened, the gas from the gas supply pipe 1 is The gas is supplied from the gas distribution pipe 7 to the large calorific value gas burner 3 through the inside of the box A, and when the gas valve 5 for the large calorific value gas burner is closed, the gas from the gas supply V supply pipe 1 is supplied from the pongee hole 10 at a constant rate. A limited amount of gas is supplied through the box A to the gas burner 4 with a small calorific value from a gas distribution pipe 8 to be described later. Inside the box A, a base end entrance 8a of a gas distribution pipe 8 to the small calorific value gas burner 4 is adjacent to the same machine, and a gas valve 6 for the low calorific value gas burner that is moved up and down by an electromagnet M2 is placed directly above the base end closing port 8a. Proximally open □8
A can be opened and closed. Illustrative symbols 11, 12,
Reference numerals 13 denote a gas main valve, a gas pressure regulator, and an automatic gas electromagnetic valve, which are sequentially arranged in the gas supply pipe 1 from its upstream side to its downstream side. 14 and 15 are large and small calorific value gas burners 3
, 4 gas nozzle mounting pipe.

16 is a bypass passage 17 that connects the inside of the box A and the gas inflow node 9.
The flow rate adjusting valve 16 is inserted into the bypass passage 17 and applies a throttling effect to the gas flow from the bypass passage 17.

In the above embodiment, the gas valves 5 and 6 for the large and small calorific value gas burners are connected to the movable pieces 18 and 19 of the electromagnets M, , M2 so that they can be opened and closed. It may also be a manually operated valve. In addition, although the configuration is shown in which the gas distribution pipe 7 to the large calorific value gas burner 3 is arranged inside the gas inflow pipe 9, it is also possible to arrange the gas distribution pipe 7 to the high calorific value gas burner 3 in an overlapping relationship with the inside and outside reversed, or to arrange them side by side without overlapping. You may. Since the present invention is configured as described above, the electromagnet M is excited to obtain a large (or medium) amount of heat, and the gas valve 5 for the large heat amount gas burner is
When only the gas supply pipe 1 is opened, the gas from the gas supply pipe 1 flows into the box A from the gas inflow cylinder 9, is made into a lagoon pressure, and is supplied from the gas distribution pipe 7 to the large calorific value gas burner 3.

In addition, when the electromagnet M2 is excited to obtain a small calorific value and only the gas valve for the small calorific value gas burner is opened, the gas from the gas supply joint pipe 1 is released through the pongee hole 10 bored in the gas valve 5 for the large calorific value gas burner. The gas flows into the box A from the bypass passage 17 of the gas inflow tube 9, is made to be equalized in pressure, and is supplied to the small calorific value gas burner 4 from the gas distribution pipe 8. At this time of small calorific value, the gas flow from the gas supply pipe 1 is throttled by the flow rate regulating valve 16 of the fine hole 10 or the bypass passage 17. Therefore, when obtaining a small calorific value, a larger pressure drop is applied to the gas flow than when obtaining a large (or small) calorific value, so the gas flow rate is reduced and the The gas flow rate ratio deviation at a small calorific value is eliminated or reduced. As explained above, this invention has the gas distribution pipes and the gas supply pipes of the large and small calorific value gas burners installed in the same box, and the gas distribution pipes of the large calorific value gas burner and the gas A gas valve for a large calorific value gas burner is arranged to open and close the joint pipe simultaneously, and a small hole is provided in the gas valve for the large calorific value gas burner, or a flow rate adjustment valve is installed in the bypass passage provided in the gas inflow pipe. With an extremely simple configuration of providing a gas flow rate, when the capacity is switched from high or medium to low, the increase in gas flow rate at a low calorific value is prevented.
The unbalance in the gas flow rate ratio between large (or medium) calorific value and small calorific value can be automatically eliminated or reduced in combination with the lagoon pressure inside the box.
This is a useful invention that can accurately obtain the target calorific value ratio in steps of large (or medium) and small.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the main parts. 1... Gas supply joint pipe, 2... Switching device, 3... Large calorific value gas burner, 4...
・Low calorific value gas burner, 5... Gas valve for large calorific value gas burner, 6... Gas valve for small calorific value gas burner, 7, 8... Gas distribution pipe, 9... ...Gas inflow pipe, 10...Pongee hole, 16...Flow rate adjustment valve, 17...Bypass passage. Figure 1 Figure 2

Claims (1)

[Claims] 1 Base end openings 7a and 8a of gas distribution pipes 7 and 8 to the large calorific value gas burner 3 and the small calorific value gas burner 4 and the gas supply pipe 1
The base end opening 9a of the gas inflow cylinder 9 connected to the distal end opening 1a of
are installed in the same box A, and the gas supply pipe 1 communicating with the gas distribution pipe 7 and the gas inflow pipe 9 is simultaneously opened and closed by the gas valve 5 for the large calorific value gas burner, and the gas distribution pipe 8 is connected to the gas valve 5 for the gas burner with a small heat value. A gas valve 6 for large and small calorific value gas burners is used to open and close the gas burner, and the gas supply pipe 1 and the inside of the box A are communicated via a flow rate restricting part for capacity switching. , 6 are provided to be selectively opened and closed by electromagnets M_1, OM_2 or other means, thereby making it possible to change the calorific value in fine steps. 2. The capacity switching type gas combustion device according to claim 1, wherein a small hole 10 is formed in the gas valve 5 for a large calorific value gas burner, and this serves as a flow rate restriction section. 3. A flow rate adjustment valve 1 is installed in the gas inflow pipe 9 leading to the gas supply pipe 1.
2. A capacity switching type gas combustion apparatus according to claim 1, wherein a bypass passage 17 having a bypass passage 17 interposed therein is provided to serve as a flow rate restriction section.