KR0170176B1 - Safety valve of a combustor - Google Patents

Abstract

The present invention relates to a safety valve for a combustion device, which is capable of shortening the overall length of a safety valve case and is securely fitted, and is excellent in fitting property and suitable for automation of the fitting process. And a tubular safety valve case which is fitted into the valve hole (through hole) 11 of the valve body 1 and has an opening formed in a portion corresponding to the gas inlet 14, and has a safety valve hole at one end thereof. The end of the safety valve case 60 is formed in a small diameter at one end of the valve hole 11 which is inserted into the valve hole 11 after the safety valve case 60, and the suction shaft 87 protrudes. It is attached to the tip of the electromagnetic actuator 8 and the adsorption shaft 87 having the casing 80 with the step 81 formed thereon, and is pressed against the safety valve hole by the solenoid spring 77 to contact the safety valve hole. Prevent the liquid The magnet unit 7 has a safety valve body 76 which is attracted by the actuator 8 and opens the safety valve hole.

Description

Safety valve of combustion device

1 is a cross-sectional view of a combustion control device of a combustion device.

2 is a cross-sectional view of a combustion control device of a combustion device.

3 is a perspective view of a combustion control device of a combustion machine.

4 is a front sectional view and a bottom view of the safety valve case.

5 is a front view of the magnet unit.

6 is a sectional view of the magnet unit.

7 is a perspective view of a tabletop.

* Explanation of symbols for main parts of the drawings

1: valve body 6: safety valve

7: magnet unit 8: electronic actuator

11 valve hole (through hole) 14 inlet port

15: outlet 50: working rod

60: safety valve case 61: open hole

63: safety valve hole (valve hole) 68: shaft support

76: safety valve body (valve body) 77: solenoid spring

80 casing 81

86 electronic solenoid 87 adsorption shaft (adsorber: amateur)

100: fire extinguishing mechanism (operation means) A: O-ring (sealing)

The present invention relates to a safety valve installed in the valve body of the combustion control device of a combustion apparatus using a combustion gas or petroleum as a fuel.

Combustion apparatuses, such as a table stove, are equipped with the electronic safety valve which keeps a valve open while a valve is opened by operation of a point and a fire extinguishing mechanism, and combustion is detected by a misfire sensor (ignition sensor). The safety valve is provided at the other end of the valve body having a through hole (valve hole), and an actuating rod inserted into the through hole in the axial direction is pressed by a point and fire extinguishing mechanism provided at one end of the valve body. It moves, and this operating rod presses a safety valve body to open a valve.

This safety valve maintains the valve open state by the output of the misfire sensor (ignition sensor) which detects burner combustion, or by the normal combustion signal outputted by the misfire sensor, and is adsorbed into the casing when misfire or abnormal combustion occurs. The suction force of the sieve and the electromagnetic actuator equipped with the solenoid is lost, and the valve is closed by the spring load of the installed solenoid spring. The safety valve is inserted into the other end of the through hole, has a valve hole at one end thereof, and has a tubular resin safety valve case having an open hole connected to the gas inlet through the side surface, the electromagnetic actuator and the installed solenoid spring. It is formed of a magnet unit made of a valve body which is touched to close the valve hole and is attracted by an electromagnetic actuator to open the valve hole.

A conventional safety valve is formed by inserting a safety valve case into a through hole of a valve body and inserting an entire solenoid into a safety valve case. For this reason, the length of a safety valve case is long, and a magnet unit may be inserted in the state in which fitting of a safety valve case is incomplete in automatic fitting, and it causes a fitting failure.

As a safety valve for supplying a battery as a power source for maintaining a valve open state, when an electromagnetic actuator using a weak current coil is used for longer battery life, an electronic solenoid is enlarged. In the magnet unit powered by a battery, it is necessary to reduce battery consumption as much as possible, and a means of increasing the number of windings of the coil and reducing the current for adsorption operation is adopted. In order to incorporate a coil with a large number of turns, the solenoid becomes large compared with a magnet unit which uses the electromotive force of the thermocouple. For this reason, a safety valve case and a valve body become large, and the apparatus becomes compact.

An object of the present invention is to provide a safety valve for a combustion device that can shorten the entire length of the safety valve case and that the fitting of the safety valve case is performed reliably so that the fitting is excellent and the automation of the bonding process is easy. have.

The present invention has a through hole constituting a part of the gas flow path for combustion, and an outlet hole is formed at one end of the through hole, and an inlet port intersecting the through hole is formed at a side wall of the other end side of the through hole. A valve body of a combustion device, an operation means formed at one end of the through hole, an operating rod inserted into the through hole and supported and displaced by the operation means, and installed at the other end of the through hole; In addition, the valve is a safety valve for opening the valve by the operating rod, the molded part of the resin is fitted to the other end of the through hole, the opening is provided in the portion corresponding to the inlet port, the valve hole at one end And a cylindrical safety valve case having a small diameter at one end of which is inserted into the through hole after the safety valve case and the adsorbent is formed. It is attached to the front end of the electromagnetic actuator and the adsorbent having a casing formed in the middle, the rear end of the safety valve case is stopped in the middle, it is pressed by the solenoid spring to the valve hole to close the valve hole And a magnet unit having a valve body which is sucked by the electromagnetic actuator to open the valve hole.

The safety valve according to claim 2 is characterized in that the safety valve case is an integrally molded article of resin, and has an axial support for slidingly supporting the other end of the operating rod on one end of the valve body.

The safety valve according to claim 3 is characterized in that the other end side of the casing of the electromagnetic actuator is formed in a larger diameter portion than the one end side, and the electromagnetic solenoid of the electromagnetic actuator is accommodated in the large diameter portion.

The safety valve according to claim 4 is characterized by sealing between a large diameter portion of the casing and the through hole with a seal.

This invention is modified when the safety valve case is fitted with the magnet unit by inserting the safety valve case into the through hole and then inserting the magnet unit. For this reason, generation | occurrence | production of a bonding failure can be prevented and it is suitable for automatic bonding.

In the configuration of claim 2, the tip of the working rod can be exactly aligned with the shaft center, and it is easy to set the same as the valve shaft of the safety valve.

In the configuration of claim 3, a large current coil can be employed without causing an increase in the diameter of the valve body by accommodating the weak current coil in the large diameter portion of the casing. In addition, due to the electromotive force of the conventional misfired sensor, it is also possible to use an electromagnetic solenoid for keeping the safety valve open.

In the structure of claim 4, even if the sealing property between the through-hole of the valve body and the magnet unit by the safety valve case is damaged due to breakage or displacement of the locking protrusion of the safety valve case, It can be held by the O-ring A, so the safety is high.

1 to 3 show combustion including the point and fire extinguishing mechanism (operating means; 100) of the air furnace burner B (shown in FIG. 3), the thermal increase / decrease mechanism 200, and the thermal control mechanism 300 during ignition. The control unit U is shown. The combustion control unit U is mounted inside the table air passage T shown in FIG. On the front of the table air passage T, the point and the fire extinguishing button 10 for operating the point and the fire extinguishing mechanism 100 is supported by a spring not shown in the front, and the swing is freely attached to the front and rear direction.

On the upper side of the point and fire-extinguishing button 10, the slide-type operation part 20 for operating the thermal increase / decrease mechanism 200 is freely formed in the left-right direction. As for the slide position of the slide type | operation part 20, the right end is a weakening force in the right side, and the middle end is a reinforcing force in FIG. 3, FIG.

The point and fire-extinguishing mechanism 100 has a cylindrical valve body attached horizontally to the front-back direction, as shown to FIG. 1 thru | or FIG. The thermal control valve body 2B of the thermal increase / decrease mechanism 200 is vertically fastened to the upper surface of the front (right side) of the valve body 1. The thermal power control valve body 2B has a cylindrical shape, and a thermal power control valve 2 is provided at the upper end of the lumen which is a gas flow path. In the valve body 1, a valve hole (through hole) 11 is formed, and on the front end side (display left end side) of the valve body 1, the point and fire button 10 shown in Figs. The switch mechanism 3 acting by this is fastened.

On the upper end of the thermal power control valve body 2B, an operating lever 4 for operating the thermal power control valve 2 and adjusting the thermal power of the wind furnace burner B is attached freely to the left and right directions. In this embodiment, the operation lever 4 is freely supported by the support point 42 on the upper wall surface of the box-shaped bracket 41 fastened to the upper end surface of the thermal power control valve body 2B. The slide type operation part 20 is fixed to the front end of the operation leisure 4.

The switch mechanism 3 is fastened to the front end surface of the valve body 1 by screws, and has a guide frame body 31 having a cross section having a substantially + -shaped guide face, and the front and rear movements are freely inserted in the guide frame body 31. The operating vehicle 32 is provided. The operating vehicle 32 has a substantially + -shaped front shape, a rod-shaped upper portion 33, a wing lever lever 34 and a rod-shaped upper portion 33 protruding upward from the rod-shaped upper portion 33. It has a micro switch operating portion 35 protruding in the transverse direction.

The operator 32 is supported in front (left side) by a spring 37 which is interposed between the guide frames 31. A micro switch (not shown) is attached to the left side of the guide frame body 31, and is opened and closed in conjunction with the displacement of the micro switch operating part 35. When the actuator 32 is pushed in the protruding position (digestion position) shown in Figs. 1 and 3, it reaches the pushed position (ignition position) shown in Fig. 2. In this state, opening the push-in stops at the intermediate position (combustion position) by a push-pushing mechanism P by a heart cam or deformed heart cam (not shown), and the original projecting position ( Return to the fire extinguishing position.

The valve hole (through hole) 11 of the valve body 1 has a coaxial core, and in the valve hole 11, a tip is in contact with the tip (right end) of the rod-shaped upper part 33 of the operator 32. 50, the back and forth movement is inserted freely. The front end portion 1A of the valve hole 11 is formed with a small diameter, the front end portion of the actuating rod 50 is freely fitted in the axial direction, and the sealing member is refurbished on the fitting surface. The intermediate portion 1B is fitted with a short wall 12 to form an intermediate diameter in the front portion and a large diameter in the rear portion to form a gas passage. The main valve 5 is provided in the middle part of the valve hole 11, and the safety valve 6 is provided in the right part.

The rear end portion 1C of the valve hole 11 is formed slightly larger in diameter than the rear portion of the intermediate portion 1B, and serves as a mounting portion of the safety valve 6 to be described later. Inlet 14, which is a circular open hole, is formed in the front portion (left side of the rear end) of the rear end portion 1C, and a hole is opened upward in the front portion of the intermediate portion 1B and continuously connected to the thermal control valve body 2B. The outlet 15 is formed to form part of the gas flow path.

The main valve 5 is installed on the main valve body 52 by inserting a rubber main valve body 52 and a metal back plate 53 attached to the groove 51 formed in the middle of the operating rod 50. It is composed of a return spring 54 and a main valve hole 55 formed in the end wall 12. The rear end of the return spring 54 is supported in contact with the front end face of the safety valve case 60 which will be described later. The actuating rod 50 is carried forward by the return spring 54 and is displaced in the front-rear direction in association with the operator 32.

The safety valve 6 is composed of a resin cylindrical safety valve case 60 fitted to the rear end 1C of the valve hole 11 and a magnet unit 7 having a tip end fitted to the safety valve case 60. .

The safety valve case 60 is integrally molded by resin injection molding such as polyacetal (POM) and nylon (PA). As shown in FIGS. 4A and 4B, the rear end is opened and the inlet 14 It has the thin cylindrical part 62 which has the opening 61 in the part corresponding to (circle). On the front end side of the cylindrical portion 62, a thick valve hole portion 64 whose center is the safety valve hole 63 is formed to have substantially the same outer diameter.

At the rear end of the cylindrical portion 62, a semicircular cutout portion 65 is formed at a position rotated by 180 degrees from the opening hole 61. The opening hole 61 is formed such that the locking projection 66 having the locking pieces 6A protrudes in the opening hole 61 from the rear side to the front side at a position rotated 180 degrees from the semicircular cutout 65. . The notch 65 is a mark for recognizing or detecting the axial rotation position of the safety valve case 60 when the safety valve case is inserted into the rear end portion 1C of the valve hole 11. The marks may use other shapes of cutouts, bumps, other visible or detectable marks.

When the safety valve case 60 is fitted into the rear end portion 1C of the valve hole 11, the locking projection 66 is caught by the hole wall of the inlet port 14, and the fitting automation that completes the stopping action is completed. Valid. An O-ring groove 73 is formed on the outer circumference of the valve hole 64, and an O-ring 67 is fitted. A cage-shaped shaft support portion 68 is continuously installed at the front end surface of the valve hole portion 64, and the tip portion 5A of the operating rod 50 is freely supported by the tip of the shaft support portion 68. An axial support hole 69 is formed coaxially.

As shown in FIG. 5 and FIG. 6, the magnet unit 7 includes the actuator 70, the switch body 70 fixed to the rear end face thereof, and the flange 71 to which the switch body 70 is fixed. ) An attachment terminal 72 and a valve mechanism 74 formed on the front end side of the electromagnetic actuator 8. On the outer circumference of the switchgear body 70, an O-ring groove 73 is formed around the O-ring A.

The electromagnetic actuator 8 has an end-mounted cylindrical casing 80 made up of a small diameter portion 82 on the front side and a large diameter portion 83 on the rear side by sandwiching the intermediate end 81. In the large diameter portion 83, an electronic solelaid 86 having a coil 85 having a bobbin attached thereto is housed in a horseshoe iron core 84, and the small diameter portion 82 is accommodated. Adsorption shaft [adsorbent: armature; 87, the rear end 88 is inserted. The front end portion 89 of the suction shaft 88 protrudes from the casing 80 in the shear direction.

The valve mechanism 74 includes an annular rubber safety valve body 76 secured together with an annular plate 75 attached to the front end portion 89 of the suction shaft, and the annular plate 75. And a solenoid spring 77 sandwiched between the front face and the front end face of the casing 80. The safety valve body 76 closes the safety valve hole 63 pressed against the safety valve hole 63 by the solenoid spring 77, and the suction shaft 87 is energized by the energization of the electromagnetic actuator 8. The solenoid 86 is adsorbed to open the safety valve hole 63.

The safety valve 6 is attached as follows. The safety valve case 60 is inserted into the rear end portion 1C of the valve body 1 and the valve hole 11 with the semicircular cutout portion 65 facing up. The safety valve case 60 stops because the outer periphery of the front end is engaged with the inner wall of the valve hole 11 by the ascending difference between the rear end 1C and the middle 1B rear part. By this pressing, the locking projection 66 is displaced inward, passes through the inside of the rear end portion 1C, and when passing through the inlet 14, the locking portion 6A is caught and fixed around the inlet 14.

Next, the magnet unit 7 is inserted into the valve hole 11 and the flange 71 is fastened to the rear end surface of the valve body 1. At this time, since the end 81 pushes the rear end of the safety valve case 60 into the valve hole 11, the safety valve case 60 is opened even when the safety valve case 60 is incompletely inserted in the previous step. It can be reliably pushed into the proper position. For this reason, it is possible to effectively prevent the occurrence of fitting defects even in an automatic fitting step in which it is difficult to confirm whether the fitting of the safety valve case 60 has been performed normally.

In addition, the O-ring A fitted in the O-ring groove 73 seals between the electromagnetic actuator 8 and the valve hole 11 of the valve body 1. O-ring (A) is the valve body (1) even if the sealing valve 66 is damaged, such as damage to the safety valve case 60, the seal between the magnet unit 7 and the valve hole 11 is damaged. Has a function of securing a seal between the valve hole 11 and the casing 80 of the magnet unit 7.

The lumen of the thermal power control valve body 2B is the gas passage 21, and the valve body 22 of the thermal power control valve 2 slides freely in the upper end portion of the gas passage 21. The valve hole of the valve body 22 is connected to the gas outflow path 24 for supplying fuel gas to the air passage burner B. As shown in FIG. The upper end of the valve body 22 is exposed to the upper portion of the thermal power control valve body 2B, and a needle pin 23 for rotating the valve body 22 is attached to the exposed portion in the orthogonal direction.

The needle pin 23 extends laterally from an upper end of the thermal power control valve body 2B and protrudes outward through an inclined slit 40 serving as a cam groove formed on the right wall of the box-shaped bracket 41. have. The inclined slit 40 converts the amount of rotation of the needle pin 23 into the amount of movement in the axial direction of the valve body 22 to increase or decrease the valve opening degree of the thermal power control valve 2.

On the right side wall of the thermal power control valve body 2B, the plate-shaped return lever 9 attached to the thermal power control valve body 2B freely attached to the thermal power control valve body 2B is attached. At the lower end of the return lever 9, a strip-shaped inversion arm 92 which comes into contact with the lever acting portion 34 of the operator and becomes an inversion point, is formed of the thermal control valve body 2B. It is successively formed as if it was bent at right angles to the front side. On the upper end of the return lever 9, a slit 93 engaged with the needle pin 23 is formed in the longitudinal direction (approximately upward direction), and has a semicircular shape engaged with the operation lever 4 for thermal power adjustment. The working arm 94 is provided on the plate surface in parallel with the slit 93.

Claims (4)

Valve body of the combustion apparatus having a through hole constituting a part of the combustion gas flow passage, an outlet is formed at one end of the through hole, and an inlet is formed at the side wall of the other end of the through hole to cross the through hole. And an operating means installed at one end of the through hole, an actuating rod inserted into the through hole and displaced and displaced by the actuating means, and installed at the other end of the through hole and valved by the actuating rod. A safety valve in which the opening operation is performed, which is an integrally molded product of resin, is fitted into the other end of the through hole, and has an open hole formed in a portion corresponding to the inlet, and has a tubular safety valve at one end thereof. One end side of the case and the safety valve case is inserted into the through hole and the adsorbent is formed to protrude. It is attached to the tip of the electromagnetic actuator and the adsorbent having a casing formed in the middle, the end of the end of the safety valve case is caught in the middle, it is pressed by the solenoid spring to contact the safety valve hole to close the valve hole, And a magnet unit having a valve body which is sucked by the electromagnetic actuator and opens the valve hole. The safety valve of claim 1, wherein the safety valve case has a shaft support part configured to freely support the other end of the operating rod at one end of the valve body. 2. The safety valve of a combustion apparatus according to claim 1, wherein the other end side of the casing is formed in a larger diameter portion than the one end side, and the electromagnetic solenoid of the electromagnetic actuator is accommodated in the large diameter portion. The safety valve of a combustion apparatus according to claim 1, wherein a sealing is provided between the casing large diameter portion and the through hole by sealing.