ES1058854U - Gas valve. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Gas valve, comprising a manifold (1) provided with a gas inlet and a plurality of injectors (2a, 2b) through which said gas exits at a certain pressure, characterized in that it comprises means (3), 5) to determine the gas output by some or all of the injectors. (Machine-translation by Google Translate, not legally binding)

Description

Gas valve.

The present invention relates to a valve of gas, with a minimum power of 3,000 kcal / h approximately.

Background of the invention

The gas valves currently known to be used in gas boilers for domestic hot water and heating comprise a gas manifold with a plurality of injectors and two safety solenoid valves.

The mission of the gas collector is to ensure that the total pressure be uniform, as well as the dynamic pressure be negligible against total pressure. In this way, it ensures that the flow of gas flowing through each injector is the same. This flow of gas, which goes outside, that is to say atmospheric pressure, quickly enters the mixing tube of the burner, inducing the air necessary for combustion to be Complete on the burner grill.

For a nominal power boiler of 25.5 kW (20,000 kcal / h of useful power), the standard collector of the market It is 13 injectors. The power for these collectors is 8,000 kcal / h approx. (which is equivalent to 7,000 kcal / h useful approx.), which It is equivalent to approximately 538 kcal / h per ramp. For powers minimums below these 538 kcal / h run the risk that there is flashback.

In the collectors currently known, the manifold injectors open all at the same time, although they need only the minimum power, as indicated It is 8,000 kcal / h.

Therefore, there is a need to decrease this minimum power and, at the same time, do not run the risk of that there is a flashback and without turning off and on the burner.

Description of the invention

With the valve of the invention are achieved solve the aforementioned problems, presenting other advantages that They will be described.

The gas valve of the present invention it comprises a manifold provided with a gas inlet and a plurality of injectors through which said gas exits at a pressure determined, and is characterized by the fact that it comprises means to determine the gas outlet by any of said injectors or entirely

In this way, a minimum power is achieved lower than in the currently known gas valves, since the gas can only flow through a certain number of injectors and not necessarily entirely.

Advantageously, said means for determining the gas outlet by any of said injectors or in full include:

- a plug that divides into two parts said collector, determining a first group of injectors and a second group of injectors; Y

- means to regulate the gas output by said second group of injectors.

Preferably, said means for regulating the gas outlet by said second group of injectors are formed by a stepper motor.

With the gas valve of the present invention, they get the following advantages:

- Generate a minimum useful power of less than 4,000 kcal / h with no risk of flashback and no shutdowns and burner ignitions;

- Perform, with total security, the ignition of the burner when a heating or water service is demanded sanitary hot;

- Obtain a power field from
3,000 kcal / h up to the design power (24 kW,
28 kW, etc.)

By reducing the number of on and off, They get the following improvements:

- Decrease in gas consumption;

- Decrease of unburned (CO);

- Boiler performance increase.

Brief description of the drawings

For a better understanding of how much has been exposed Some drawings are accompanied in which, schematically and only to non-limiting example title, a case study of realization.

Figure 1 is a schematic view of the valve of the present invention in its closed position;

Figure 2 is a schematic view of the valve of the present invention in the position in which it opens the first safety valve;

Figure 3 is a schematic view of the valve of the present invention in the position in which it opens the second safety valve, that is in its position of minimum power;

Figure 4 is a schematic view of the valve of the present invention in the position in which it is regulated the gas flow through its injectors; Y

Figure 5 is a schematic view of the valve of the present invention in the maximum position power.

Description of a preferred embodiment

In the figures it can be seen that the valve of gas of the present invention comprises:

- a manifold 1 provided with a gas inlet and a plurality of injectors 2a, 2b, 14 in the case of the presented embodiment;

- a plug 3 that divides the manifold 1 into a first group of injectors 2a (two in the case of the embodiment represented) and a second group of injectors 2b (twelve in the case of the embodiment represented);

- two safety solenoid valves 4, which regulate the entry of gas to the collector;

- a stepper motor 5, which regulates the output of gas through the second group of injectors 2b.

With this gas valve powers are achieved between 4 kW and 28 kW.

The gas inlet to the manifold 1 is made such as indicated by the arrow in figure 1.

To get a better understanding of operation of the valve of the present invention has been indicated the presence of gas with a scratch.

In figure 1, the two solenoid valves 4 are placed in series and close the gas passage, acting as means safety and as usual in gas valves conventional.

Figure 2 shows the valve the present invention with the first solenoid valve 4 open, and in Figure 3 has shown the valve of the present invention with the two solenoid valves 4 open.

As can be seen in Figure 3, the manifold 1 is divided into two parts by means of the plug 3. In this way, it is achieved that the gas only exits through the two injectors 2a of the first group, achieving a minimum power
4 kW

The element that regulates the passage of gas through of the remaining 12 injectors 2b is a stepper motor 5, of linear drive and fed at a constant voltage.

As the motor shaft step by step 5 it is moving, there is a lower loss of load, getting a higher gas flow.

It can be seen in Figure 4 that regulate the gas flow through the second group of injectors 2b using the stepper motor 5.

Figure 5 shows the point of minimum loss of load in the power of the twelve injectors 2b of the second group. This will be the maximum power point of the gas valve (28 kW).

Although reference has been made to a concrete embodiment of the invention, is evident to an expert in the matter that the gas valve described is susceptible to numerous variations and modifications, and that all the details mentioned can be substituted by others technically equivalent, without departing from the scope of protection defined by the attached claims.

Claims (3)

1. Gas valve, comprising a manifold (1) provided with a gas inlet and a plurality of injectors (2a, 2b) through which said gas exits at a certain pressure, characterized by the fact that it comprises means (3 , 5) to determine the gas outlet by some of the injectors or in their entirety. 2. Gas valve according to claim 1, characterized in that said means for determining the gas outlet by any of said injectors or in their entirety comprise: - a plug (3) that divides said two parts manifold (1), determining a first group of injectors (2a) and a second group of injectors (2b); Y - means (5) for regulating the gas output by said second group of injectors (2b). 3. Gas valve according to claim 2, characterized in that said means for regulating the gas outlet by said second group of injectors (2b) are formed by a stepper motor (5).