KR960002352B1 - A valve arrangement for a burner device - Google Patents

Abstract

a cast safety valve body(5), a valve hole(50) formed at the body(5); a valve seat(55) surrounding a safety valve port(56) formed in an inner part of the hole(50); and a valve disc(65) inserted into the hole(50) to switch the port(56) in contact with the seat(55), wherein the hole(50) is tapered to be larger at an inlet side, and the seat(56) is a cast surface. A connecting part of the seat(55) to an inner periphery of the hole(50) is a corner having a radius of curvature(R). The body(5) has an O ring compressure surface(54) moulded to form a tapper used for sealing.

Description

Combustor Valve

1 is a cross-sectional plan view of a combustor valve of the present invention.

2 is a plan sectional view of the gas control apparatus of the goro burner of the present invention.

3 is a plan view of the furnace burner of the present invention.

4 is a plan sectional view of the safety valve body of the present invention.

5 is a front view of the safety valve body of the present invention.

6 is a right side view of the safety valve body of the present invention.

* Explanation of symbols for main parts of the drawings

1: valve assembly 2: main valve

3: electronic safety valve 4: valve body

5: safety valve body 6: solenoid valve

7: ignition control mechanism 50: valve hole

54 O-ring pressure contact 55 Valve seat

56: safety valve inlet 65: valve body

The present invention relates to a valve for a combustion device formed in a gas combustion supply path of a combustion device such as a gas stove.

Conventional valves for combustion fuels of gaseous fuels such as gas are formed by casting the valve body, and cutting parts requiring dimensional accuracy, such as valve seats and O-ring contact surfaces, which become sealing surfaces. It was prepared by.

By the way, the cutting process is not only time-consuming but also cutting powder is generated, it is difficult to completely remove the cutting furniture even after washing in the post-treatment process.

Moreover, at the time of cutting, since the bubble which generate | occur | produced inside at the time of casting was exposed, there existed a fault which a sealing defect generate | occur | produces in a fixed ratio on a cutting surface.

In order to eliminate the fault caused by such a cutting process, the valve body may be manufactured only by casting. By the way, casting has a drawback that it is difficult to obtain precise dimensional accuracy, and since it deforms microscopically at the time of taking out a metal mold | die, precision falls easily. Therefore, the valve body manufactured only by casting is not practical.

An object of the present invention is to provide a valve for a combustor so that the mold can be easily separated during the molding operation by casting and the precision and sealability can be further increased.

The present invention provides a cast valve body, a valve hole formed in the valve body, a valve seat surrounding a valve inlet formed inside the valve hole, and inserted into the valve hole to contact the valve seat to contact the valve inlet. A valve for a combustor having a valve body for opening and closing a valve, wherein the valve hole is a tapered hole having a large inlet side, and the valve seat is formed into a casting surface, and the valve seat is formed with an inner peripheral surface of the valve hole. The connecting portion is characterized in that formed with a corner having a radius of curvature.

In addition, the valve body has an O-ring press-contacting surface for sealing, which is tapered by casting at the inlet of the valve hole.

In the valve body of the present invention, since the valve hole is a tapered hole having a large inlet side and the valve seat is a casting surface, the mold can be easily taken out. Therefore, the deformation | transformation of the product at the time of taking out a metal mold | die is few, the position of a valve seat can be set correctly, and the flatness of a valve seat surface is also high. As a result, the valve body which can be used practically enough only by casting can be mass-produced at low manufacturing cost.

And the connection part of the valve seat and the inner peripheral surface of a valve hole was made into the corner which has a curvature radius. Therefore, the mold can be easily taken out.

Moreover, the casting surface which used the O-ring press surface as the taper surface is used as it is. Therefore, the sealing property can be secured without cutting, and the problem of removing the cutting powder or exposing the cavity to the cutting surface can be solved.

This invention is demonstrated based on the Example shown to drawing.

In FIG. 2 and FIG. 3, 100 is a gas control apparatus in the combustion apparatus which burns gaseous fuels, such as fuel gas and vaporized petroleum fuel, and the combustion gas to the goro burner 200 shown in FIG. To control the supply. The go-ro burner 200 includes an annular large burner 201 and a small burner 202 disposed therein.

The gas control device 100 includes a valve assembly 1. In the valve assembly 1, a large nozzle 11 and a small nozzle 12, which are blown out by gas into the large burner 201 and the small burner 202, are formed in parallel, and the large nozzle 11 and the small nozzle are formed in parallel. The first control valve 13 and the second control valve 14 are formed to adjust the amount of gas supplied to (12). The first control valve 13 is operated by the thermal power control lever 15 to control the gas flow rate as the large nozzle 11, and the second control valve 14 is connected to the thermal power control lever 15 by a ring mechanism ( 16) to control the gas flow rate as the small nozzle (12).

A main valve 2 is formed upstream of the first control valve 13 and the second control valve 14, and an electronic safety valve 3 is attached upstream of the first control valve 13 and the second control valve 14.

The valve assembly 1 is provided with a valve body 4 made by die casting of aluminum alloy and a safety valve body 3 fastened to the valve body 4.

As shown in FIG. 1 and FIG. 2, the main valve body 41 of the said main valve 2 is integrally formed in the upstream of the valve body 4. As shown in FIG.

The main valve body 41 has a tapered valve hole 42 having a large diameter on one side (left side: upstream side in the drawing), and the gas passage portion 43 is connected on the other side (right side: downstream side in the drawing). The gas passage portion 43 is formed with a continuous operating rod support through portion 44 with a small diameter. A valve seat 45 is formed between the main valve body 41 and the gas passage portion 43, and a main valve inlet 46 is formed at the center of the valve seat 45.

The valve hole 42 is a tapered hole having a taper angle α = 4 °, and the valve seat 45 is a non-cut cast surface, and the inner peripheral surfaces of the valve seat 45 and the valve hole 42 are formed. The connecting portion of is a corner with a radius of curvature R = 2.0 mm.

In addition, the main valve body 41 is formed with an O-ring contact surface 47 for sealing formed by heat taper by casting at the inlet of the valve hole 42. The O-ring 48 is fitted. A flange 49 is formed at the tip of the main valve body 41, and serves as a mounting portion of the electromagnetic safety valve 3. The tip of the operating rod support penetrating portion 44 is a mounting portion of the operating mechanism.

The main valve 2 has an operating rod 21 mounted to be inserted into the center of the main valve body 41. In the operating rod 21, a main valve body 22 made of rubber and the main valve body 22 are fitted outside, and the main valve body 22 opens and closes the main valve inlet 46. do. The return spring 24 is mounted between the protective washer 23 and the safety valve body 5 described later, and the operating rod 21 is supported to the right side of the drawing by the spring force.

In addition, the operating rod 21 is supported by the sealing mechanism 25 so that the sliding rod can be freely slid.

The solenoid safety valve 3 includes the safety valve body 5, one end of which is fastened to the end surface of the main valve body 41, and a cover plate 61, which is fastened to the other end surface of the safety valve body 5, on an outer circumference thereof. And a solenoid valve 6 housed in the safety valve body 5 and an outlet 62 fixed to an outer surface of the cover plate 61.

As shown in FIGS. 4-6, the said safety valve body 5 is the valve lower cylinder part 52 in which the flange 51 which one end side is attached to the upper flange 49 is formed in the cross section. On the other end side of the safety valve body 5, the inside is made into the valve hole 50, and the taper cylinder part 53 which accommodates the said solenoid valve 6 is formed.

An O-ring press-contacting surface 54 is formed at the end of the tapered cylinder portion 53, and a valve seat 55 and a safety valve inlet 56 are formed between the lower cylinder portion 53 and the valve portion. The side part 57 of the tape cylinder part 53 is provided with the flange-side side hole 57 connected with the gas supply pipe 17 (refer FIG. 3).

The safety valve body 5 is molded by aluminum die casting, taken out of a mold, and manufactured by shot peening, and no cutting is performed.

The valve hole 50 becomes wider toward the end side with a taper angle α = 2 degrees, and the O-ring press-contact surface 54 is a surface having a taper angle β = 90 degrees. In addition, the joint between the inner circumferential surface of the valve hole 50 and the valve seat 55 is a corner having a radius of curvature R of 1.0 mm or more. Therefore, by configuring the safety valve body 5 as described above, the mold inserted in the valve hole 50 can be easily taken out, and since the deformation of the safety valve body 5 hardly occurs when the mold is taken out, The precision which can be used practically only by casting is obtained.

The taper angle α of the valve hole 50 or the valve hole 42 needs to be 1.0 degree or more, and although the upper limit of the taper angle α may be increased, it is practically 5 degrees in view of the structure of the safety valve body 5. It becomes as follows. Moreover, it is preferable that the taper angle (beta) of the O ring press contact surface 54 or O ring press contact surface 47 is 60 degree or more and 120 degrees or less for ensuring sealing property. Further, if the radius of curvature R of the junction portion between the valve hole 50 or the valve hole 42 and the valve seat 55 or the valve seat 45 is 0.25 mm or more, the mold can be smoothly taken out. The upper limit of (R) becomes about 2.0 mm in order to ensure the valve seat surface which is an annular planar surface.

In the related art, the valve seats 55 and 45 or the O-ring contact surfaces 54 and 47 have been cast for the post-treatment process. Therefore, there was no countermeasure against deformation at the time of pulling out a metal mold | die, and the taper angle (beta) was set to 150 degree | times-180 degree | times. Therefore, when the mold is taken out, the deformation of the safety valve body 5 is large, and accuracy has been insufficient.

As shown in FIG. 1, the solenoid valve 6 includes an electromagnet 63 fastened to an inner surface of the cover plate 61, a plunger 64 provided in the electromagnet 63, and a tip of the plunger 64. And a return spring 66 of the plunger 64 and the valve body 65 made of flange-shaped rubber. The O-ring 67 is sandwiched and sealed between the cover plate 61 and the O-ring contact surface 54.

The solenoid valve 6 compresses the return spring 66 when the electromagnet 63 is energized to hold the plunger 64 in the electromagnet 63. When the energization is stopped, the solenoid valve 6 is applied to the spring force of the return spring 66. The plunger 64 is pushed to the electromagnet 63 by this.

At the end of the operating rod support cylinder 44, an ignition operation mechanism 7 for opening and closing the main valve 2 and setting and resetting the electronic safety valve 3 is fastened.

The ignition operation mechanism 7 is a reset mechanism 71 fastened to the end portions of the operation rod 21 and the operation rod support cylinder 44. The reset mechanism 71 includes a mechanism case 72, a push button 73, and the push button 73 includes a return spring 74 and a micro switch 75.

When the ignition manipulation mechanism 7 presses the push button 73 to the maximum, the tip of the push button 73 presses the operating rod 21 and the plunger 64 to deform to the left side of the drawing. Accordingly, the main valve inlet 46 closed by the main valve body 22 and the safety valve inlet 56 closed by the safety valve body 65 are opened. When the hand button is released from the push button 93, the push button 73 stops at an intermediate position, while maintaining the valve flame state of the main valve inlet 46, and simultaneously recognizes that the push button 73 is press-fitted. .

When the go-rotor 200 is ignited in conjunction with the pressing operation of the push button 73, and the electromotive force of the mounted thermocouple increases, the plunger 64 is attracted to the electromagnet 63 by the electromagnetic force, thereby maintaining the electronic safety. The valve open state of the valve 3 is maintained.

When the push button 73 is pressed again, the push button 73 returns to the original position, the main valve inlet 46 is closed, and the go-ro burner 200 is extinguished. As the thermocouple loses electromotive force by this fire extinguishing, the electromagnetic safety valve 3 is pressed by the spring force of the spring 66 to close the valve. In addition, even when burner 200 is burnt by any cause, a thermocouple loses electromotive force, and closes a valve similarly to the above.

According to the present invention as described above, since the mold inserted in the valve hole can be easily taken out, and the deformation of the safety valve body hardly occurs when the mold is taken out, substantial precision can be obtained only by casting, so that the precision of the product can be obtained. As a result, the reliability and the defect rate are lowered, the production cost is reduced and produced, and the user can be economically profitable.

Claims (1)

A valve body which is cast, a valve hole formed in the valve body, a valve seat surrounding the valve inlet formed inside the valve hole, and a valve inserted into the valve hole to contact the valve seat to open and close the valve inlet. In the valve for a combustion apparatus having a sieve, the valve holes 42 and 50 have a large tapered state of the inlet side, and the taper angle α is between 1 and 5 °, and the valve seats 45 and 55 are formed. Is formed into a casting surface, the connection portion between the valve seat 45, 55 and the inner circumferential surface of the valve hole 42 forms a corner with a radius of curvature R of at least 0.2 mm. (54) and the taper angle (β) of the O-ring pressure contact surface (47) is formed between 60 and 120 degrees to ensure sealing property.