CN2176500Y

CN2176500Y - Fire break-off protector for burner

Info

Publication number: CN2176500Y
Application number: CN 93241755
Authority: CN
Inventors: 邓新华; 彭世尼; 黄启均
Original assignee: HUADI BURNERS CO Ltd ZHONGSHAN CITY
Current assignee: HUADI BURNERS CO Ltd ZHONGSHAN CITY
Priority date: 1993-10-14
Filing date: 1993-10-14
Publication date: 1994-09-07
Anticipated expiration: 2003-10-14

Abstract

The utility model relates to a fire break-off protector for burners. A bimetal sheet which can be distorted when heated is used as a sensing element. A self controlling valve mechanism is controlled by the displacement and the force generated by the temperature distortion of the bimetal sheet. A self controlling valve is a single valve, in which a permanent magnet and a resetting device are arranged. Thereby, when a gas burning appliance is extinguished accidentally on the way, an air supply path can be automatically cut off for the purpose of security protection for the extinguishing.

Description

Fire break-off protector for burner

The utility model relates to the device that can obtain safeguard protection when a kind of gas appliance makes purposes like outer stopping working.

Flame-out protection device is installed on gas appliance; essential for the safety and reliability that improve product; the device that has adopted at present mostly is a thermoelectric (al) type; utilize thermocouple to be heated and produce " Seebeck " effect opens solenoid valve of electromotive force; thermocouple loss of heat when fray-out of flame and thermoelectrical potential is disappeared and the magnetic valve loss of excitation is closed; the greatest drawback of this mode is that the thermocouple life-span is short; armature material expensive in the magnetic valve; machining accuracy is high and surface appearance is worsened; and self-ignition has the regular hour to postpone (general 5-10S) to entering guard mode owing to the reaction of thermocouple is insensitive, makes complicated operationization.The early stage dual metal type that uses is owing to can not overcome the time delay when opening and the drawback that is not closed completely is easily used few.Other is as the conducting flame formula, and thermistor-type etc. all need additional power source, and cost height and sensing element life-span are short.These apparatus structure complexity, operate loaded down with trivial details, the cost height, the life-span is short, shortcoming easily out of control causes that employing blowout protection safety device is difficult to popularize on burner.

The utility model is in order to overcome above-mentioned deficiency; at gas appliance purposes is like can to cut off air feed automatically when flame-out outward, implement the device of flame-out safeguard protection and provide a kind of, and with improve gas appliance on the way in the practicality of flame-out protection device; convenient, unfailing performance is a purpose.

The utility model to achieve these goals; propose following technical scheme: flame-out safety guard comprises bimetal leaf in this burner way; drive link and internally piloted valve; the outer casing bottom of internally piloted valve links to each other with base; be provided with centre bore in the boss at base middle part; bowl-shape elastic sealing film is housed between boss outer and the outer casing inner wall; the diaphragm seal built-in spring; T shape inner sleeve core is housed on the mesopore of diaphragm seal top; be placed with permanent magnet on the inner sleeve core; the inner sleeve core is adorned the inner sleeve that the top is a tang outward; dress I font spool on the tang of inner sleeve, the spool top margin links to each other with the valve of cover top portion, is inserted with push rod in the valve; inner sleeve is with the convex outer sleeve outward; be contained at the bottom of the outer sleeve on the rim of a bowl edge of diaphragm seal, on the shoulder of outer sleeve and between the spool top margin spring be housed, T shape inner sleeve core bottom is connected with the connecting rod that passes centre bore; the connecting rod other end is connected with bimetal leaf, has blow vent on the shell upper sidewall.

Characteristics of the present utility model are; Simple in structure, performance safety, reliable, with low cost, and can be integrated with the coaxial installation of the valve of gas appliance, use easily.

Concrete structure of the present utility model is provided by accompanying drawing 1-3.

Fig. 1 is the overall structure schematic diagram of flame-out safety guard in the burner way.

Fig. 2 is the state diagram when flame-out safety guard is lighted a fire in the burner way.

Schematic diagram when Fig. 3 enters guard mode for the safety guard that stops working in the burner way.

Primary structure is among the figure; Push rod 1, valve 2, spool 3, spring 4, permanent magnet 5, inner sleeve 6, inner sleeve core 7, outer sleeve 8, diaphragm seal 9, tang 10, drive link 11, bimetal leaf 12, shell 13, base 14, centre bore 15, mesopore 16, blow vent 17.

Below in conjunction with accompanying drawing the utility model is described in detail.

Flame-out safety guard in this burner way; comprise bimetal leaf 12; drive link 11 and internally piloted valve; shell 13 bottoms of internally piloted valve link to each other with base 14; be provided with centre bore 15 in the boss at base middle part; bowl-shape elastic sealing film 9 is housed between boss outer and the outer casing inner wall; diaphragm seal built-in spring 4; T shape inner sleeve core 7 is housed on the diaphragm seal top mesopore 16; be placed with permanent magnet 5 on the inner sleeve core, the inner sleeve core is adorned the inner sleeve 6 that the top is a tang 10 outward, and inner sleeve links to each other with inner sleeve core tight fit; the material of inner sleeve core is a magnet; dress I font spool 3 on the tang of inner sleeve, the valve 2 of spool top margin and cover top portion is adjoint, is inserted with push rod 1 in the valve; inner sleeve is with convex outer sleeve 8 outward; be contained at the bottom of the outer sleeve on the rim of a bowl edge of diaphragm seal, on the shoulder of outer sleeve and between the spool top margin spring be housed, T shape inner sleeve core bottom is connected with the drive link 11 that passes the centre bore on the base; the drive link other end is connected with bimetal leaf 12, has blow vent 17 on the shell upper sidewall.

During use, an end of bimetal leaf is fixed on burner head can experience the flame temperature place, and another termination drive link also links to each other with internally piloted valve mechanism, and internally piloted valve is connected on the combustion gas intake channel.

When burner is not worked; valve 2 relies on spring 4 to press toward spool 3 and closes; beginning along with the igniting action; the push rod 1 that links to each other with the gas appliance valve promotes spool 3 and opens valve 2; the other end of spool 3 has been attracted by permanent magnet 5; keep valve 2 to open when igniting action is finished, gas circuit is connected, thus the time delay when having avoided flame-out protection device to light a fire.(as Fig. 2)

After burner is lighted; the flame heat bimetal leaf 12 of burner fire hole makes it to expand; drive drive link 11 and draw inner sleeve core 7; inner sleeve 6 links to each other with inner sleeve core 7 tight fits; so inner sleeve 6 is pulled with the expansion of sheet metal 12, when inner sleeve 6 was pulled to certain distance, magnet 5 broke away from spool 3; 3 of spools and inner sleeve 6 join, and device enters guard mode.(as Fig. 3)

When accident extinguishing, bimetal leaf 12 coolings are shunk, and

spring

4 and 10 resets spool 3 and inner sleeve 6, after bimetal leaf 12 shrinks through short distance, spool 3 just breaks away from inner sleeve 6, and this moment, spring 4 was fastened valve 2, and bimetal leaf 12 continues to shrink and relies on spring 10 that inner sleeve is resetted.

But this control procedure makes bimetal leaf just valve-off when short the contraction, and need not rely on the full retracted for clearance valve-off of bimetal leaf, thereby has overcome the shortcoming that the shut-in time is long and be not closed completely easily.

Claims

1; flame-out safety guard in a kind of burner way; it is characterized in that: comprise bimetal leaf; drive link and internally piloted valve; the outer casing bottom of internally piloted valve links to each other with base; be provided with centre bore in the boss at base middle part; bowl-shape elastic sealing film is housed between boss outer and the outer casing inner wall; the diaphragm seal built-in spring; T shape inner sleeve core is housed on the mesopore of diaphragm seal top; be placed with permanent magnet on the inner sleeve core; the inner sleeve core is adorned the inner sleeve that the top is a tang outward; dress I font spool on the tang of inner sleeve, the valve of spool top margin and cover top portion is adjoint, is inserted with push rod in the valve; inner sleeve is with the convex outer sleeve outward; be contained at the bottom of the outer sleeve on the rim of a bowl edge of diaphragm seal, on the shoulder of outer sleeve and between the spool top margin spring be housed, T shape inner sleeve core bottom is connected with the drive link that passes centre bore; the drive link other end is connected with bimetal leaf, has blow vent on the shell upper sidewall.