EP0046843A1 - Soupape de sécurité d'allumage pour équipements chauffés à mazout ou à gaz - Google Patents

Soupape de sécurité d'allumage pour équipements chauffés à mazout ou à gaz Download PDF

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Publication number
EP0046843A1
EP0046843A1 EP81103519A EP81103519A EP0046843A1 EP 0046843 A1 EP0046843 A1 EP 0046843A1 EP 81103519 A EP81103519 A EP 81103519A EP 81103519 A EP81103519 A EP 81103519A EP 0046843 A1 EP0046843 A1 EP 0046843A1
Authority
EP
European Patent Office
Prior art keywords
valve
armature
rocker arm
closing
valve according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP81103519A
Other languages
German (de)
English (en)
Other versions
EP0046843B1 (fr
Inventor
Helmut Abele
Franz Macho
Karl Rilling
Paul Weinmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0046843A1 publication Critical patent/EP0046843A1/fr
Application granted granted Critical
Publication of EP0046843B1 publication Critical patent/EP0046843B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F23N5/107—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using mechanical means, e.g. safety valves

Definitions

  • the invention is based on an ignition safety valve according to the main patent ... (patent application 29 20 875.1). With this valve, due to the decoupling of the closing element and armature, only small forces are transmitted to the armature adhering to the magnetic poles, so that the electromagnet can be dimensioned smaller than before without loss of closing force Positional tolerances of valve seat and electromagnet can be refined.
  • the valve is not provided with a so-called reclosing lock, which prevents the valve from being opened again after an arbitrary closing of the valve and extinguishing of the main and pilot burner, as long as the armature still adheres to the magnetic poles due to the thermal inertia of the ignition fuse and simulates the presence of a pilot light, but this is no longer the case due to the previous interruption of the gas supply.
  • valve is provided with the function of a so-called reclosing lock, which prevents the ignition fuse from being overwritten due to operating errors in the device.
  • the operating device of the valve can be simplified according to the feature of claim 8 in that a single manually operated actuator is used for the arbitrary opening and closing of the valve.
  • This actuator can have a middle position according to the features of claim 10, through which the actuator indicates a previous switch-on command.
  • the features are proposed according to claim 10.
  • the ignition safety valve as is often the case, is functionally coupled with a so-called lock valve should be, which interrupts the gas supply to the main burner, as long as the ignition fuse valve is opened arbitrarily and the ignition fuse has not yet responded, it is proposed to develop the manual actuator according to the features of claim 11.
  • Manufacturing and warehousing can be simplified if the parts are combined to form an assembly in accordance with the features of claim 12.
  • the electromagnet which is preferably designed as a standard magnet insert, can be exchanged from the operating side of the ignition safety valve.
  • the ignition safety valve is integrated in a fitting which also has other regulating and control parts for the gas supply to the burner of the device to be monitored.
  • FIG. 1 An embodiment of the invention is shown in the drawing and explained in more detail in the following description.
  • the single figure shows a longitudinal section through an ignition safety valve, which is installed in a gas fitting for a gas heating furnace.
  • the valve has a housing consisting of three parts 10, 11 and 12, on which a plastic cover 13 is placed on top.
  • a gas inlet connector 14 is formed on the housing part 10 and leads into a chamber 15 'in the housing part 11. This is connected via a passage 16 to a chamber 17 between the two housing parts 10 and 11, in which one in the drawing indicated, lying in front of the plane of the gas outlet 18.
  • the passage 16 is monitored by an ignition safety valve 20, the closing member 21 of which is loosely guided on a bolt 22 fastened in the housing part 10.
  • the closing member 21 is coupled with all-round movement play with a rocker arm 24 which is laterally supported on bearing webs 25 and 26 of the housing parts 11 and 12.
  • the right end of the rocker arm 24 in the drawing is angled upward and supported on a compression spring 28 which is supported on a cutting edge bearing 29 formed on the housing part 12.
  • the arrangement is such that the rocker arm 24 can snap from the end position shown, in which it is supported by the closing member 21 on the seat of the valve 20, to a second end position, which is indicated in the drawing at 30.
  • a so-called magnet insert 32 is fastened coaxially to the valve 20 by means of a union nut 33, which contains an electromagnet with magnetic poles 34, the excitation winding of which is fed by a thermocouple which is heated by an ignition flame.
  • An armature 36 is also movably guided in the housing of the magnet insert and is rigidly connected via a bolt 37 to a collar 38 and a mushroom-shaped pin 39.
  • a spring 40 engages the collar 38 and is supported on the housing of the magnet insert 32.
  • a conical hat-shaped plastic part 41 is blown open on the mushroom-shaped pin 39, which fits into a conical recess 42 in the closing member 21 and centers the parts against one another.
  • a manually operated push button 44 is provided, which is connected to a plunger 45 which is guided tightly in the housing part 12.
  • the plunger 45 has an annular shoulder 46 at the beginning of a section 47 which is weakened in diameter and which passes through a recess 48 in the rocker arm 24 with play and carries a disk-shaped driver 50 at its free end.
  • the recess 48 is dimensioned such that the unattenuated upper section of the plunger 45 can pass through it with play.
  • a slide 52 is guided in a longitudinally movable manner, which on its upper side 54 has a locking surface 55 at an edge zone partially covering the recess 48 in the rocker arm 24.
  • the slider 52 is provided with a raised section 58 and an adjoining, obliquely angled down section 59, which bears on the outside of the plastic part 41 under the influence of a spring 60 which is supported on the bearing web 26 and acts on the raised section 58 of the slider.
  • the spring 60 strives to always keep the slide 52 in contact with the plastic part 41; taking into account the fact that both the closing member 21 and the slide 52 moves with the rocker arm 24, the position of the slide 52 relative to the rocker arm 24 in its longitudinal direction depends on the distance which the plastic part 41 and thus the armature 36 of the Magnet insert 32 occupies opposite the closing member 21.
  • the locking surface 55 of the slide 52 has entered under the shoulder 46 of the plunger 45, so that when it is depressed, the rocker arm 24 pivots about its bearing point 25, 26 and thereby the closing member 21 is lifted from its seat and the armature 36 to the Magnetic poles 34 is applied.
  • the rocker arm 24 is swung from one to the other stable end position.
  • a helical spring 62 which is supported on the upper side of the housing part 12, acts on the pushbutton 44 from below.
  • the helical spring 62 endeavors to guide the pushbutton 44 upwards until an annular shoulder 63 on the circumference of the pushbutton 44 comes to rest on the inside of the cover 13.
  • the free end of a leaf spring 64 presses against the circumference of the pushbutton 44 and is clamped between the helical spring 62 and the housing part 12 with a bent base section 65.
  • the free end of the leaf spring 64 snaps behind the shoulder 63 of the pushbutton 44 when the shoulder 46 of the plunger 45 comes into contact with the locking surface 55 of the slide 52.
  • a cam-like elevation 66 strikes the switching tongue 67 of a switch 68 on its circumference, which, when the valve is installed, monitors the excitation circuit of a solenoid valve connected downstream of the ignition safety valve.
  • the switch 68 is designed so that the downstream solenoid valve is closed when the pushbutton 44 is in its lowest position, which is reached when the armature 36 rests on the magnetic poles 34. After releasing the pushbutton 44, it returns under the influence of the helical spring 62 to a central position in which it is held in a latching manner by the leaf spring 64 reaching behind the shoulder 63. In this middle position, the engagement of the pushbutton 44 in the switch 68 has already ended, so that the downstream solenoid valve is opened again.
  • valve 20 is open and the downstream solenoid valve is closed, pilot gas passing through a pilot gas line branched between the two valves from the main gas line to the pilot burner of the device and, after ignition, can heat the thermocouple which controls magnet insert 32.
  • this safety device has responded and the push button 44 is then released, it returns, as already described, to the central position predetermined by the shoulder 63 and the detent spring 64, in which the downstream solenoid valve is open.
  • the distance of the driver 50 on the plunger 45 to its shoulder 46 is selected such that when the armature 36 is applied and the valve 20 is open, the driver 50 still has the rocker arm 24 pivoted most counterclockwise in this position not affected, so that the valve 20 remains open and the gas can flow to the main burner of the device.
  • valve 20 can close and the armature 36 can lift off the magnetic poles 34 without the plunger 45 opposing this return movement. A new switch-on attempt can then be made from the middle position of the pushbutton 44.
  • the compression spring 28 holds the rocker arm 24 in its end position corresponding to the opening of the valve 20.
  • the push button 44 is to be pulled out of the middle position until the shoulder 63 comes to rest on the cover 13.
  • the driver 50 of the plunger 45 pivots the rocker arm 24 back into the starting position shown, in which the compression spring 28 presses the closing element 21 of the valve firmly onto its seat.
  • the armature 36 still adheres to the magnetic poles 34 because of the thermal inertia of the safety device, so that the plastic part 41 emerges from the recess 42 of the closing member 21 and the axial distance between the two parts increases.
  • the spring 60 moves the slide 52 to the right against the valve axis, the bent end portion 59 of the slide 52 sliding along the conical outer surface of the plastic part 41.
  • the arrangement could also be such that the push button has an eccentric surface above the shoulder 63, via which the leaf spring 64 comes out of its locked position by turning the push button 44.
  • the spring 60 displacing the slide 52 could also be supported instead of on the housing part 12 at the left end of the rocker arm, which can possibly simplify the assembly of the parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
EP81103519A 1980-08-16 1981-05-08 Soupape de sécurité d'allumage pour équipements chauffés à mazout ou à gaz Expired EP0046843B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803031114 DE3031114A1 (de) 1980-08-16 1980-08-16 Zuendsicherungsventil fuer gas- oder oelbeheizte geraete
DE3031114 1980-08-16

Publications (2)

Publication Number Publication Date
EP0046843A1 true EP0046843A1 (fr) 1982-03-10
EP0046843B1 EP0046843B1 (fr) 1985-02-20

Family

ID=6109829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103519A Expired EP0046843B1 (fr) 1980-08-16 1981-05-08 Soupape de sécurité d'allumage pour équipements chauffés à mazout ou à gaz

Country Status (2)

Country Link
EP (1) EP0046843B1 (fr)
DE (2) DE3031114A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109237066A (zh) * 2018-11-14 2019-01-18 佛山市顺德区美的洗涤电器制造有限公司 燃气旋塞阀

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675508A (en) * 1953-01-19 1954-04-13 Gen Controls Co Electromagnetically controlled operator
US2726716A (en) * 1950-12-30 1955-12-13 Robertshaw Fulton Controls Co Safety control for gaseous fuel burners
AT205714B (de) * 1957-05-07 1959-10-10 Friedr Siemens Werke Ag Thermoelektrische Zündsicherung für Gasbrenner
DE1205923B (de) * 1964-02-11 1965-12-02 Vaillant Joh Kg Thermoelektrische Zuendsicherung, insbesondere fuer Umlauf-Gaswassererhitzer
US3597138A (en) * 1970-04-03 1971-08-03 Itt Fuel-burning apparatus
DE1729891B2 (de) * 1967-02-20 1971-12-30 Theobald Ets A Gasschalter mit thermoelektrischer Zuendsicherung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2726716A (en) * 1950-12-30 1955-12-13 Robertshaw Fulton Controls Co Safety control for gaseous fuel burners
US2675508A (en) * 1953-01-19 1954-04-13 Gen Controls Co Electromagnetically controlled operator
AT205714B (de) * 1957-05-07 1959-10-10 Friedr Siemens Werke Ag Thermoelektrische Zündsicherung für Gasbrenner
DE1205923B (de) * 1964-02-11 1965-12-02 Vaillant Joh Kg Thermoelektrische Zuendsicherung, insbesondere fuer Umlauf-Gaswassererhitzer
DE1729891B2 (de) * 1967-02-20 1971-12-30 Theobald Ets A Gasschalter mit thermoelektrischer Zuendsicherung
US3597138A (en) * 1970-04-03 1971-08-03 Itt Fuel-burning apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109237066A (zh) * 2018-11-14 2019-01-18 佛山市顺德区美的洗涤电器制造有限公司 燃气旋塞阀

Also Published As

Publication number Publication date
DE3031114A1 (de) 1982-04-08
DE3169003D1 (en) 1985-03-28
EP0046843B1 (fr) 1985-02-20

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