EP4229355A1 - Dispositif d'allumage - Google Patents

Dispositif d'allumage

Info

Publication number
EP4229355A1
EP4229355A1 EP21844636.7A EP21844636A EP4229355A1 EP 4229355 A1 EP4229355 A1 EP 4229355A1 EP 21844636 A EP21844636 A EP 21844636A EP 4229355 A1 EP4229355 A1 EP 4229355A1
Authority
EP
European Patent Office
Prior art keywords
ignition
changeover switch
resistance measuring
measuring unit
resistance
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.)
Withdrawn
Application number
EP21844636.7A
Other languages
German (de)
English (en)
Inventor
Jürgen HOFF
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP4229355A1 publication Critical patent/EP4229355A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C21/00—Checking fuzes; Testing fuzes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
    • F41A19/58—Electric firing mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/12—Bridge initiators
    • F42B3/121—Initiators with incorporated integrated circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • F42C11/06—Electric fuzes with time delay by electric circuitry
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition
    • F42D1/045—Arrangements for electric ignition
    • F42D1/05—Electric circuits for blasting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A17/00—Safety arrangements, e.g. safeties

Definitions

  • the invention relates to an ignition device with at least one voltage source, a resistance measuring unit, a first changeover switch and two output terminals for connection to an ignition line, the at least one voltage source being connectable to an ignition switching unit or the resistance measurement unit via the first changeover switch.
  • Ignition devices of the type mentioned are preferably portable devices for initiating electrical igniters and already installed ignition circuits for blasting applications. They essentially consist of a generator, a capacitor and the triggering device. If the generator axle is actuated with the crank, the electrical energy generated is fed to the capacitor and stored there. For ignition, the charged capacitor is connected to the ignition circuit via the release button.
  • These devices are used for remote electrical ignition of explosives, e.g. in a quarry, in mining, during construction and demolition work, with several detonators being connected to an ignition line, which must be checked for function before ignition, which is usually determined by determination of the resistance that can be measured at the connection ends of the ignition cable. An improperly connected or defective igniter can thus be detected in a simple manner.
  • Another source of error can be a ground fault in the ignition circuit due to insufficient insulation, which is why an insulation test should or must be carried out before ignition.
  • a disadvantage of the previously known devices is that the resistance measurements can often only be carried out in a very laborious manner because separate measuring devices are used for this, which requires the ignition line connections to be reconnected. As a result, some time elapses between measurement and ignition, during which changes can occur that are then not recorded at the time of ignition. It would therefore be advantageous if between Resistance determination and ignition process are no large time intervals. Furthermore, the contact resistance at the terminals can result in changes in resistance, which can occur during a reconnection process and thus falsify the measurement result.
  • the object of the invention is therefore to specify a compact ignition device with which the processes of ignition and resistance measurement with regard to the ignition circuit and insulation can be carried out safely and reliably and with little expenditure of time.
  • the resistance measuring unit has at least two switchable measuring ranges, of which a first measuring range is provided for an ignition circuit test and a second measuring range for an insulation test, and that an insulation test control unit, a second switch and a ground terminal for connection to an external grounding device are provided, wherein the resistance measuring unit can be connected to the earth terminal via the second changeover switch, wherein the insulation test control unit is configured to switch the measuring ranges of the resistance measurement unit from ignition circuit testing to insulation testing when the second changeover switch is actuated accordingly.
  • the device according to the invention thus forms an integrated insulation and ignition circuit tester for explosive applications and contains both an ohmmeter for measuring the ignition circuit resistance and an insulation tester for measuring the insulation resistance of ignition circuits to ground (shunt resistance) with a preferably increased measuring voltage.
  • the device according to the invention has a separate safety socket for connecting the ground spike.
  • a further embodiment of the invention can consist in the at least one voltage source being formed by a chargeable battery, which is accommodated in an explosion-proof, closable, gas-tight battery compartment, and by a manually operated generator with rectifier and ignition capacitor.
  • the ignition and the resistance measurement can be operated with voltage sources that are independent of one another, e.g. to prevent the current occurring during the resistance measurement from ever exceeding a maximum value, in order to avoid the risk of misfiring.
  • the second changeover switch can be a momentary changeover switch which, as long as it is pressed, causes the insulation measurement to be carried out and then a return to the ignition circuit resistance measurement takes place.
  • the first measurement range for the ignition circuit test can be 0 to 1999 ⁇ and the second measurement range for the insulation test can be 0 to 19999 ⁇ . This covers the range required for ignition circuit and insulation testing for normal purposes, but other ranges can also be selected if required.
  • the second measuring range is preferably ten to twenty times the first measuring range.
  • the measurement of the insulation resistance to ground is carried out with an increased measurement voltage or an increased measurement current compared to the ignition circuit test.
  • a further embodiment of the invention can consist in the hand-operated generator being coupled to an indicator light which is configured to light up when readiness for ignition is reached and to go out when readiness for ignition is not present, with the ignition being automatically locked when readiness for ignition is not present.
  • the ignition button is mechanically locked to prevent, for example, only partial ignition.
  • the resistance measuring unit comprises a digital resistance measuring device in order to ensure better reading accuracy.
  • FIG. 1 shows an embodiment of a circuit arrangement of the ignition device according to the invention.
  • the housing 11 can be a plastic housing with a high insulation resistance, which is equipped with luminous paints or reflective surfaces for better visibility.
  • the ignition device 12 is connected via two output terminals 8, 9 to an ignition line 20 which, together with one or more detonators, not shown, connected for example in series, form a detonation circuit suitable for detonating explosives from a distance.
  • the voltage source 1 In order to comply with relevant regulations, the voltage source 1 must be a manually operated, crank-operated generator for igniting the igniter or igniters, whose AC output voltage is rectified and smoothed via a rectifier (not shown) and an ignition capacitor (not shown).
  • An indicator light 13 is provided in parallel with the voltage source 1 and lights up when a presettable voltage value is exceeded.
  • a digital voltmeter (not shown) can also be provided that displays the DC voltage that can be tapped off at the output of the voltage source 1 .
  • the indicator light 13 is configured to light up when readiness for ignition is reached and to go out when readiness for ignition is not present, with the ignition being automatically locked, e.g. by a locking lever, if readiness for ignition is not present.
  • the voltage source 1 is connected at one output connection to the output terminal 8 and at a further output connection to a first, double changeover switch 3, which in the position shown in Fig. 1 (IGNING) connects the voltage source 1 to an ignition switching unit 4, which in turn is connected to the Output terminal 9 is connected.
  • a first, double changeover switch 3 which in the position shown in Fig. 1 (IGNING) connects the voltage source 1 to an ignition switching unit 4, which in turn is connected to the Output terminal 9 is connected.
  • the ignition switch unit 4 When an assigned button (not shown) is pressed, the ignition switch unit 4 outputs a square-wave pulse with a defined curve shape to the ignition line 20, which leads to the ignition of the igniters (not shown).
  • a voltage source 2 is provided, which is connected to the output terminal 8 at one output connection and is connected to the first double changeover switch 3 at a further output connection connects an input of a resistance measuring unit 7, the resistance measuring unit 7 preferably comprising a digital resistance measuring device.
  • changeover switch 3 is switched over that it is brought into its second position (CHECK), in which the connection between voltage source 1 and ignition switching unit 4 is interrupted and a connection is established between voltage source 2 and one input of resistance measuring unit 7.
  • the voltage source 2 is formed by a rechargeable battery, which is accommodated in an explosion-proof manner in a battery compartment that can be closed in a gas-tight manner.
  • the resistance measuring unit 2 has at least two switchable measuring ranges, of which a first measuring range is provided for an ignition circuit test and a second measuring range for an insulation test.
  • the first measuring range for the ignition circuit test is 0 to 1999 Q and the second measuring range for the insulation test is 0 to 19999 Q.
  • a second switch 6 is provided which, in the first position shown in FIG. 1, connects the other input of the resistance measuring unit 7 to the output terminal 9 in which the ignition circuit test is carried out. To carry out this measurement, the first switch 3 must be in its second position (CHECK).
  • the second changeover switch 6 is switched to its second position, in which it connects the second input of the resistance measuring unit 7 to a ground terminal 10, which is connected to an external grounding device 30, which can be a grounding rod or spike, for example, so that an insulation test can be carried out can when the first switch 3 is in its second position (CHECK).
  • the second changeover switch 6 is also operatively connected to an insulation test control unit 5, which is configured to switch the measuring ranges of the resistance measuring unit 7 from ignition circuit testing to insulation testing when the second changeover switch 6 is actuated accordingly.
  • an insulation test second position of the second changeover switch 6
  • a switch is preferably also made internally to a higher measuring voltage or a higher measuring current for the resistance measuring unit 7.
  • the resistance measuring unit 7 is switched to the first measuring range via the insulation test control unit 5 in order to be able to carry out an ignition circuit test.
  • the Resistance measuring unit 7 switched to its second measuring range in order to be able to perform insulation testing.
  • the second changeover switch 6 is designed as a pushbutton changeover switch which, as long as it is pressed, causes the insulation measurement to be carried out and then returns to the ignition circuit resistance measurement.
  • the two output terminals 8, 9 are preferably short-circuited with one another in order to include both wires of the ignition line 20 in the insulation measurement.
  • the resistance measuring unit 7 is electrically isolated from the high-voltage circuit of the voltage source 1 by suitable measures, such as insulation and specially designed changeover switches 3, 6, e.g. rotary switches, in order to avoid overloading.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

L'invention concerne un dispositif d'allumage comportant au moins une source de tension (1, 2), une unité de mesure de résistance (7), un premier commutateur (3) et deux bornes de sortie (8, 9) à raccorder à une ligne d'allumage (20), ladite au moins une source de tension (1, 2) pouvant être reliée à une unité de commande d'allumage (4) ou à une unité de mesure de résistance (7) par l'intermédiaire du premier commutateur (3), l'unité de mesure de résistance (2) présentant au moins deux plages de mesure commutables dont une première plage de mesure est prévue pour effectuer un contrôle du circuit d'allumage et une seconde plage de mesure est prévue pour effectuer un contrôle d'isolation, et il est prévu une unité de commande de contrôle d'isolation (5), un second commutateur (6) ainsi qu'une borne de terre (10) destinée à être raccordée à un dispositif de terre (30) externe, l'unité de mesure de résistance (7) pouvant être reliée à la borne de terre (10) par l'intermédiaire du second commutateur (6), l'unité de commande de contrôle d'isolation (5) étant configurée de manière à commuter les plages de mesure de l'unité de mesure de résistance (7) en cas d'actionnement correspondant du second commutateur (6), afin de faire passer du stade de contrôle du circuit d'allumage à celui de contrôle d'isolation.
EP21844636.7A 2020-10-19 2021-10-19 Dispositif d'allumage Withdrawn EP4229355A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50896/2020A AT524354B1 (de) 2020-10-19 2020-10-19 Zündvorrichtung
PCT/EP2021/078989 WO2022084338A1 (fr) 2020-10-19 2021-10-19 Dispositif d'allumage

Publications (1)

Publication Number Publication Date
EP4229355A1 true EP4229355A1 (fr) 2023-08-23

Family

ID=79730503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21844636.7A Withdrawn EP4229355A1 (fr) 2020-10-19 2021-10-19 Dispositif d'allumage

Country Status (3)

Country Link
EP (1) EP4229355A1 (fr)
AT (1) AT524354B1 (fr)
WO (1) WO2022084338A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492459A (en) * 1944-11-03 1949-12-27 Phillips Petroleum Co Blasting cap circuit tester
FR2616548B1 (fr) * 1987-06-15 1989-12-01 Alkan R & Cie Dispositif de test de l'impedance d'une ligne de puissance et son application au test d'amorces de moyens pyrochniques
JP2634824B2 (ja) * 1987-10-16 1997-07-30 日本油脂株式会社 電子式延時雷管
GB2388420B (en) * 2001-11-27 2004-05-12 Schlumberger Holdings Integrated activating device for explosives

Also Published As

Publication number Publication date
AT524354B1 (de) 2022-04-15
WO2022084338A1 (fr) 2022-04-28
AT524354A4 (de) 2022-04-15

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