GAS VALVE AND MECHANISM Technical Field

The present invention is designed to be used primarily with industrial and all gas- operated appliances, culinary equipment, and cooking appliances, wherein it particularly relates to a gas valve (tap) which may be adjusted according to gas amount needed by a low-flow regulating screw and comprises an adjustable screw system optionally suitable for being used with pilot and without pilot.

Prior Art

In industrial and domestic gas-operated appliances, as well as in culinary equipment and cooking devices used nowadays, gas is transmitted primarily by being passed through the valve (tap) body. Turning the gas on and adjusting the gas amount when the gas is turned on or turning it off completely, is ensured by means of the help of a part that can move through the gas. As a result of the movement of the gas which is received from the valve (tap) body in a pressurized state, the gas changes the direction thereof and the line through which the gas passes shrinks and expands in volume. Consequently, the gas pressure applied to the part constantly changes. Adverse scenarios such as gas leaks are experienced due to the backlash of the part moving by the changing gas pressure. Gas leaks increase the energy costs, and the increase in the amount of leaking gas brings forth the risk of causing harm not only to humans but also to animal and environmental health.

In the state of the art, sealing of moving parts and tap body are ensured by lubrication. The movable part is lubricated and coupled to the tap body, thereby preventing these two elements from rubbing against each other and from wearing and leaking. However, in this method, due to frictions, the sealing oil loses its adhesion characteristic and becomes unable to ensure the sealing between the valve body and the mechanism. This problem is not experienced with the pressure indicated in the standards and relevant codes for gas-operated appliances and manually operated taps. However, when the gas pressure increases due to the changing temperature and volume, or as a result of user errors or pressure reducer failure or due to using incompatible equipment, the component backlashes and a high amount of leakage occur. As a result thereof, human, animal, and environmental health are adversely affected, and situations that can potentially result in injuries or even death may occur, and at the same time, energy costs increase and occupational safety risks arise.

Aforementioned disadvantages existing in the state of the art necessitated conducting R&D studies in gas taps used in all gas-operated appliances, especially in industrial furnaces.

Objects of the Invention

The main advantage of the invention is that the gas valves (taps) in industrial and all gas-operated appliances, culinary equipment, and cooking appliances have a screw structure that allows for adjusting the correct amount of gas for cooking foods requiring different heat energies.

Another advantage of the present invention is that the valve (tap) allows for adjusting an extra amount of gas by means of the adjustment screw located in the valve (tap) body while gas is transferred in any setting position.

Further auxiliary advantages of the invention are as listed below.

• It provides sealing at pressure values of 65 mbar and above.

• It ensures 100% energy efficiency owing to its leakproof structure.

• The inventive gas valve (tap) is suitable for use with or without pilot.

• It provides high occupational health and safety.

• It is cost-efficient due to its high energy efficiency.

• Gas flow can be adjusted at a minimum level by means of the low flow regulating screw. • Since the sealing is ensured by the O-rings, while the state of the art outflows and gas leaks will not be encountered, the service life is maximized. Detailed Description of the Invention

The gas valve (tap) and the mechanism thereof having a screw structure realized to achieve the aimed advantages of this invention are shown in the accompanying figures.

Wherein;

FIGURE 1 illustrates the disassembled view of the valve (tap) with pilot

FIGURE 2 illustrates the body section view of the valve (tap) with pilot FIGURE 3 illustrates the view of the mechanism of the valve (tap) with pilot FIGURE 4 illustrates maximum closed position view of the valve (tap) with pilot

FIGURE 5 illustrates the low adjustment position view of the valve (tap) with pilot

FIGURE 6 illustrates maximum opened position view of the valve (tap) with pilot

FIGURE 7 illustrates the pilot position view of the valve (tap) with pilot FIGURE 8 illustrates the disassembled view of the valve (tap) without pilot

FIGURE 9 illustrates the body section view of the valve (tap) without pilot

FIGURE 10 illustrates the mechanism view of the valve (tap) without pilot

FIGURE 11 illustrates the adjustable low flow position view of the valve (tap) without pilot FIGURE 12 illustrates the closed position view of the valve (tap) without pilot

FIGURE 13 illustrates maximum opened position view of the valve (tap) without pilot

In order to provide a better understanding of the inventive gas valve (tap) mechanism having a screw structure, references shall be made to the reference numerals indicated below hereinafter in the following portions of the description. Wherein;

1. Valve (tap) body without pilot

2. Valve (tap) mechanism without pilot

3. Adjustment screw

4. Magnet coil

5. Coil cap

6. Pushpin

7. Push shaft

8. Mechanism cover

9. Pushpin spring

10. O-ring washer

11. O-ring of pin

12. Valve (tap) O-ring

13. Mechanism O-ring

14. Screw O-ring

15. Pilot output

16. Screw slot

17. Gas outlet way

18. Gas inlet way

19. Pilot gas passageway

20. Low flow gas passageway

21. Low flow adjustment stage

22. Valve (tap) mechanism with pilot

23. Maximum flow gas passageway 33. Valve (tap) body with pilot

Gas valves (taps) used especially in industrial and all gas-operated appliances, culinary equipment, and cooking appliances can be systematically preferred as with pilot or without pilot. The pilot outlet (15), which makes the difference between the valve (tap) body (33) with pilot and the valve (tap) body (1) without pilot, is an additional second gas outlet and it is used to supply an auxiliary gas to the ignition apparatus in devices having this feature. (Figure -2 and Figure 9) Besides this process, there is no difference between the operating principles of gas valves (taps) with pilot and without pilot, and the operating principle of the gas valve (tap) is described through a single example. (Figure 1 and Figure 8)

The valve (tap) body (1) without pilot which is shown in Figure 9, is the main body that allows the gas in the system to enter and exit at the desired flow rate. The valve (tap) mechanism (2) without pilot having a grooved structure that is a mechanism adjusting the amount of gas passing through axial movements, is coupled inside the valve (tap) body (1) without pilot. Since its inner surface is grooved, the valve (tap) body (1) without pilot fits perfectly inside the valve (tap) mechanism (2) having a grooved structure. In addition, there is low flow gas passageway (20), the low flow adjustment stage (21) and the maximum flow gas passageway (23) for the gas coming from the gas inlet way (18) on the inner surface of the valve (tap) body (1) without pilot to flow through the gas outlet way (17) at different flow rates. The low flow gas passageway (20), the low flow adjustment stage (21) and the maximum flow gas passageway (23) are lined up successively as straight cylindrical stages in the valve (tap) body (1) without pilot. Additionally, in systems with pilot, there is a pilot gas passageway (19) that provides gas flow to the pilot (15) in the valve (tap) body (33) with pilot with a similar form.

The pushpin (6) is inserted through the center of the valve (tap) mechanism (2) without pilot. The rear end of the pushpin (6) is connected to the push shaft (7). The push shaft (7) moves the push pin (6) backwards and forwards and rotates axially the valve (tap) mechanism (2) without pilot. Thus, it allows the valve (tap) mechanism (2) without pilot for assisting to adjust the amount of gas passing through the valve (tap) body (1) without pilot. The pushpin spring (9), which is inserted over the pushpin (6), creates an adverse reaction force such that the push shaft pushes the pushpin (6) and pushes said push pin back at the end of the process. O-ring washer (10) is fitted on the push pin spring (9). The O-ring washer (10) fixes the O-ring of pin (11) inside the valve (tap) mechanism (2) without pilot so that it does not move. O-ring of pin (11) ensures the sealing between the valve (tap) mechanism (2) without pilot and the push pin (6). Magnet coil (4) is passed from the back portion of the valve (tap) body (1) without pilot. During the push shaft (7) pushes the pushpin (6), a user identified thermo-electricity detector is connected to the valve (tap), and the magnet coil retracts itself by means of power from this detector and starts the gas flow into the valve (tap) body (1) without pilot. The magnet coil (4) is fixed to the valve (tap) body (1) without pilot by the coil cover (5). Thus, gas sealing between valve (tap) body (1) without pilot and the magnet coil (4) is ensured. The mechanism cover (8) is positioned at the front part of the valve (tap) body (1) without pilot. The mechanism cover (8) limits the backward movement of the valve (tap) mechanism (2) without pilot and the push shaft (7) by the adverse force effect of the pushpin spring (9).

The mechanism O-ring (13) positioned on the conical upper part of the valve (tap) mechanism (2) without pilot shown in Figure 9, maintains the gas flow into low flow gas passageway (20) by turning off gas that is in fully open position when said valve (tap) mechanism (2) is in low position and coming from gas inlet way (18). Therefore, when the system is at low adjustment, it is one of the main elements that allow gas transfer to the gas outlet way (17) at the desired flow rate. Another O-ring located on the valve (tap) mechanism (2) without pilot is the valve (tap) O-ring (12), which is positioned at the bottom of said valve (tap) mechanism (2) without pilot. The valve (tap) O-ring (12) ensures the sealing between the valve (tap) mechanism (2) without pilot and the valve (tap) body (1) without pilot. When the valve (tap) body (1) without pilot is in the low setting as shown in Figure 11, the adjustment screw (3) passed through the screw slot (16) formed on the gas outlet way (17), goes back and forth with its axial movement, and adjust the maximum and minimum low gas flow rate. The screw O-ring (14) positioned at the bottom of the adjustment screw (3) ensures the seal between said adjustment screw (3) and the gas outlet way (17).

When the system without pilot is in the closed position as shown in Figure 12, by rotating the pushpin (7) at a direction of 90°, the valve (tap) mechanism (2) rotates at the same angle and moves forward axially. As a result of this movement, the gas coming from the gas inlet way (18) is released and the maximum flow flows to the gas outlet way (17) passing through the gas passageway (23). Turning the push shaft (7) in the direction of 90° gives the maximum amount of gas from the system without pilot. (Figure 13) The valve (tap) mechanism (2) without pilot continues its axial movement forward while the push shaft (7) continues to be rotated. As a result of this movement, the mechanism O-ring (13) positioned on the valve (tap) mechanism (2) without pilot is fitted into the low flow adjustment stage (21). By this means, the passage of gas at maximum flow is prevented by the mechanism O-ring, and the gas coming from the inlet gas way (18) flows from the low flow gas passageway (20) to the gas outlet way (17). (Figure 13)

When the valve (tap) body (1) without pilot is in the low setting, the adjustment screw (3) located on the gas outlet way (17) ensures that the reduced gas flow is readjusted by going back and forth with its axial movement. By this means, it enables the user to make an extra flow adjustment on the reduced gas flow.

Analogously, when the system with pilot is in closed positioned as shown in Figure 4, valve (tap) mechanism (22) with pilot having grooved structure moves forward axially by turning at equal angle with the push shaft (7) turning the direction of 90° and the gas coming from the gas inlet way (18) is started to be released. In order for the valve (tap) mechanism (22) with pilot to rotate inside the valve (tap) body (33) with pilot, the inner surface of the valve (tap) body (33) with pilot is designed to be grooved. By means of the grooved structure of the valve (tap) mechanism (22) with pilot, gas flow to the pilot (15) is ensured by passing the gas through the pilot gas passageway (19) with first turning in the direction of 15°. (Figure 7) Then, as the push shaft (7) continues to rotate towards 90°, the completely released gas flows to the gas outlet path (17) passing through the gas passageway (23). Turning the push shaft (7) in the direction of 90° gives the maximum amount of gas from the system with pilot. (Figure 6) The valve (tap) mechanism (22) with pilot shown in Figure 3 continues its axial movement forward while the push shaft (7) continues to be rotated. As a result of this movement, the mechanism O-ring (13) positioned on the pilot valve (tap) mechanism (22) closes the low flow adjustment stage (21) and continues the flow of gas passing through the low flow gas passageway (20) and thus a decrease in the amount of gas is ensured. (Figure 5) While gas flow is ensured from the low flow gas passageway (20), the adjustment screw (3) positioned inside the screw slot (16) located on the gas outlet way (17) ensures that the gas flow is readjusted by moving back and forth with its axial movement.