阅读说明：本技术 灭火剂排放装置 (Fire extinguishing agent discharging device ) 是由 朱利安·赖茨 于 2021-05-14 设计创作，主要内容包括：本申请涉及灭火剂排放装置,包括：具有灭火剂引导通道的壳体、金属手柄、管连接装置、用手动控制单元调节灭火剂供应的调节装置和排放喷嘴。该排放装置包括测量电流互感器,其包围在引导通道中的灭火剂并且生成与灭火剂中流动的电流成比例的电流信号；绝缘体部,其在引导通道的纵长方向上将壳体划分成具有排放喷嘴的排放区域和具有手动控制单元的入口区域,该互感器设置在绝缘体部中；第一电极,其设置在灭火剂流中的排放区域中,并且用于检测灭火剂电位；第二电极,其设置在金属手柄上,用于检测入口区域中的地电位；以及控制装置,具有评估电流信号和灭火剂电位与地电位之间的电位差的评估电子器件及该器件控制并且作用于调节装置的驱动元件。(The application relates to a fire suppressant discharge device comprising: a housing with a fire suppressant guiding channel, a metal handle, a pipe connection, a regulating device for regulating the fire suppressant supply with a manual control unit and a discharge nozzle. The discharge device comprises a measuring current transformer which surrounds the extinguishing agent in the guide channel and generates a current signal proportional to the current flowing in the extinguishing agent; an insulator part dividing the housing into a discharge area having a discharge nozzle and an inlet area having a manual control unit in a lengthwise direction of the guide passage, the transformer being provided in the insulator part; a first electrode provided in a discharge area in the flow of the fire extinguishing agent and for detecting a potential of the fire extinguishing agent; a second electrode disposed on the metal handle for detecting a ground potential in the inlet region; and a control device having evaluation electronics for evaluating the current signal and the potential difference between the extinguishing agent potential and ground potential and a drive element which the evaluation electronics controls and acts on the regulating device.)

1. A fire suppressant discharge device (10) comprising a housing (12) with a guiding channel (22) through which a fire suppressant (20) flows, a metal handle (24), a pipe connection (26), a regulating device (30) for regulating the supply of fire suppressant using a manual control unit (28) and a discharge nozzle (16),

it is characterized in that the preparation method is characterized in that,

a measuring current transformer (40), the measuring current transformer (40) surrounding the extinguishing agent (20) flowing in the guiding channel (22) and generating a current signal (44) proportional to a current (42) flowing in the extinguishing agent (20),

an insulator part (50), the insulator part (50) dividing the housing (12) in the lengthwise direction of the guide channel (22) into a discharge region (14) with the discharge nozzle (16) and an inlet region (18) with the manual control unit (28), the measuring current transformer (40) being provided in the insulator part (50),

a first electrode (52), the first electrode (52) being arrangedIn the discharge area (14) in the flow of extinguishing agent and for detecting the potential (V) of the extinguishing agent_ex)，

A second electrode (54), the second electrode (54) being arranged on the metal handle (24) for detecting a ground potential (V) in the inlet region (18)_PE) And an

A control device (60) having evaluation electronics (62) and having a drive element (64), the evaluation electronics (62) being used for evaluating the current signal (44) and for evaluating the potential (V) of the extinguishing agent_ex) To the ground potential (V)_PE) The potential difference (U) appearing therebetween_d) The drive element (64) is controlled by the evaluation electronics (62) and acts on the regulating device (30).

2. Fire suppressant discharge device (10) according to claim 1,

it is characterized in that the preparation method is characterized in that,

the evaluation electronics (62) are configured for: if said potential difference (U)_d) If the voltage threshold is exceeded, an alarm signal (66) is output.

3. Fire suppressant discharge device (10) according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

the evaluation electronics (62) are configured for: controlling an electromechanical drive element (64) to interrupt the supply of extinguishing agent by means of the regulating device (30) if the current (42) flowing in the extinguishing agent (20) exceeds a current threshold.

4. Fire suppressant discharge device (10) according to any one of claims 1 to 3,

it is characterized in that the preparation method is characterized in that,

the measuring current transformer (40) is configured for detecting direct current and alternating current.

Technical Field

The present invention relates to a fire suppressant discharge device comprising a housing with a guiding channel through which the fire suppressant flows, a metal handle, a pipe connection, a regulating device for regulating the supply of fire suppressant using a manual control unit, and a discharge nozzle.

Background

When extinguishing fires in electrically charged electrical devices and systems using fire extinguishing agents, life threatening conditions caused by electric shock may occur to the occupants if they are in a safe area.

To produce the extinguishing effect, the extinguishing agent is discharged as a jet or pressurized full jet onto the fire site by means of an extinguishing agent discharge device, such as a spray nozzle with an adapter nozzle.

Fire suppressant discharge devices known from the prior art comprise a housing forming a guide channel (spray nozzle) through which the fire suppressant flows. As is known, these extinguishing agent discharge devices comprise a metal handle, a pipe connection at the input and a regulating device with a manual control unit for regulating the supply of extinguishing agent, and a discharge nozzle at the outlet for the directed discharge of the extinguishing agent jet.

The extinguishing agent used may have an electrical conductivity. In particular, if water is used as the fire suppressant, it is usually taken from a local water main or rain water reservoir. It is therefore not chemically pure water and has a measurable electrical conductivity.

If a certain safety distance is not maintained when extinguishing a fire with an electrically conductive extinguishing agent, an electrically conductive connection between the electrically charged combustion object and the extinguishing agent discharge device may be created due to the absence of droplet formation in the water jet.

Personnel who touch the fire suppressant discharge device by hand at the metal handle are at risk of being subjected to a voltage that may cause a life-threatening current to pass through the body (body current).

Fire fighting in the field of electric vehicles poses a special threat, since in the event of an accident, a motor vehicle with a high-voltage electric drive may at first glance not be identified as a vehicle with a dangerous vehicle voltage.

According to standard fire-fighting procedures, a certain safety distance is maintained by the rescuer when fighting a fire in the electrical installation. However, these safe distances can only be maintained if the threat has been correctly assessed.

Different safety protocols for rescuers are known for fighting fires in electric vehicles. For example, an electric vehicle is to be charged with insulating gloves and carry a measuring device. In addition, protective clothing and insulating mats have been proposed.

From an electrical point of view these measures are not sufficient in the case of fire fighting, since on the one hand the live voltage of any number of metal points of the burning object, for example a deformed electric vehicle, needs to be measured, and on the other hand there is also the problem of realizing the reference potential of the on-board network as a non-grounded power supply system when an electric vehicle is involved.

The use of insulating mats also appears to be problematic because they give a false sense of safety and lose their effectiveness when wetted (with fire suppressant).

It is therefore an object of the present invention to increase the electrical safety of the personnel in the event of fire fighting by means of a fire extinguishing agent discharge device.

Disclosure of Invention

This object is achieved by a fire suppressant discharge device according to the invention, comprising a housing having a guide channel through which a fire suppressant flows; a metal handle; a pipe connection device; a regulating device for regulating the supply of extinguishing agent using a manual control unit; a discharge nozzle; a measuring current transformer which surrounds the extinguishing agent flowing in the guide channel and generates a current signal which is proportional to the current flowing in the extinguishing agent; an insulator part dividing the housing in a lengthwise direction of the guide passage into a discharge area having a discharge nozzle and an inlet area having a manual control unit, the measuring current transformer being provided in the insulator part; a first electrode provided in a discharge area in the flow of the fire extinguishing agent and for detecting a potential of the fire extinguishing agent; a second electrode disposed on the metal handle for detecting a ground potential in the inlet region; and a control device having evaluation electronics for evaluating the current signal and for evaluating a potential difference occurring between the extinguishing agent potential and ground potential, and having an electromechanical drive element which is controlled by the evaluation electronics and acts on the regulating device.

The basic idea of the invention is to detect and evaluate the current flowing in the extinguishing agent and to measure and evaluate the potential difference between the potential of the extinguishing agent and ground potential in order to prevent dangerous body currents.

In order to detect the current flowing in the extinguishing agent, the extinguishing agent discharging device comprises a measuring current transformer which surrounds the extinguishing agent flowing in the guide channel and detects the current flowing in the extinguishing agent as a primary current. On the secondary side, the measuring current transformer generates a current signal proportional to the detected current.

The fire suppressant discharge device further comprises an insulator portion dividing the housing into a discharge area and an inlet area in the longitudinal direction of the guiding channel. The discharge area comprises a discharge nozzle for the fire suppressant jet; the inlet area is essentially constituted by a metal handle, a tube connection and adjustment device and a manual control device.

The measuring current transformer is arranged in the insulator part such that there is no parallel current circuit of the current flowing in the extinguishing agent, which parallel current circuit could falsify the current detection and such that the current flowing in the extinguishing agent is ensured to flow through the measuring current transformer along a defined current path.

In view of this, the measuring current transformer provides a current signal on the secondary side, which can be evaluated in the evaluation electronics for potentially life-threatening currents flowing through the human body.

In order to support and in addition to measuring the current, it is also intended to detect a potential difference (voltage) between the fire suppressant potential and the ground potential via an electrode arrangement having a first electrode and a second electrode. The first electrode is arranged in a discharge area in the flow of extinguishing agent; a second electrode is disposed in the inlet region of the metal handle for detecting a ground potential.

In this way, the potential difference (voltage drop) between the fire suppressant potential in the discharge area and the potential at the handle is measured, the potential at the metal handle corresponding to the ground potential when neglecting the relatively low body impedance of a person.

This potential difference may provide an additional indication as to whether a touch voltage is present that is dangerous to the operator and may cause a life-threatening current to flow through the human body.

According to the invention, the extinguishing agent discharging device also comprises a control device with evaluation electronics and with an electromechanical drive element. In the evaluation electronics, the current signal and the potential difference are evaluated for any exceeding of a threshold value of the current that may endanger the human body. An electromechanical drive element, for example an electric motor, controlled by the evaluation electronics acts directly on the adjusting device.

In a further advantageous embodiment, the evaluation electronics are configured to: if the potential difference exceeds the voltage threshold, an alarm signal is output.

An optical and/or acoustic (pre) alarm can be triggered by the evaluation electronics if the potential difference exceeds a presettable voltage threshold.

Further, the evaluation electronics are configured to: if the current flowing in the extinguishing agent exceeds a current threshold value, the electromechanical drive element is controlled to interrupt the supply of extinguishing agent by means of the regulating device.

If a current flowing in the extinguishing agent and possibly causing a current flow through the human body to be endangered is detected by the evaluation electronics, the electromechanical drive element is controlled by the evaluation electronics such that the supply of extinguishing agent is immediately interrupted via the regulating device.

Furthermore, the measuring current transformer is configured for detecting direct current and alternating current.

In order to be able to detect the risk of a current flowing through the human body caused by the direct voltage source, the measuring current transformer is configured for detecting a direct current as well as for detecting an alternating current.

Drawings

Further advantageous embodiment features emerge from the following description and the drawings, which describe a preferred embodiment of the invention using examples.

FIG. 1 shows the use of a fire suppressant discharge device in extinguishing a fire, an

Fig. 2 shows a fire suppressant discharge device according to the invention in a schematic view.

Detailed Description

Fig. 1 shows the use of a fire suppressant discharge device 10 when extinguishing a fire place 6 of an electrical apparatus 2, such as a substation or an electric vehicle.

The fire fighter (actor) 4 embraces and actuates the extinguishing agent discharge device 10, and the extinguishing agent 20 supplied via the extinguishing agent pipe 9 is aimed at the fire location 6 in the direction of the extinguishing agent jet 8. When the electrical device 2 is charged, an electric current can be formed in the electrically conductive extinguishing agent 20 via the extinguishing agent jet 8, which electric current is taken as a dangerous current I_KContinues to flow through the body of firefighter 4 standing on ground potential PE.

Fig. 2 shows a fire suppressant discharge device 10 according to the invention in a schematic view.

The extinguishing agent discharge device 10 according to the invention comprises a two-part housing 12 which is divided in the longitudinal direction via an insulator part 50 into an (extinguishing agent) inlet area 18 and a (extinguishing agent) discharge area 14. The extinguishing agent 20 is guided via a pipe connection 26 through a guide channel 22 formed by the housing 12 and is discharged at the discharge nozzle 16 (spray nozzle with adapter nozzle). The fire suppressant supply may be regulated by the manual control unit 28 via a regulating device 30, for example realized as a throttle butterfly valve or a ball valve.

The extinguishing agent discharge device 10 comprises a measuring current transformer 40 which completely surrounds the extinguishing agent 20 flowing in the guide channel 22 with its loop coil and generates a current signal 44 (secondary current) which is proportional to the current 42 (primary current) flowing in the extinguishing agent 20.

The extinguishing-agent discharging device 10 further comprises a first electrode 52 arranged in the flow of extinguishing agent for detecting the extinguishing-agent potential V in the discharge area 14_ex. According to the invention, a second electrode 54 is arranged on the metal handle 24 in the inlet region 18 for detecting a ground potential V as a reference potential_PE。

Measuring the current signal 44 of the current transformer 40 and the fire suppressant potential V detected by the first electrode 52_exAnd ground potential V detected by the second electrode 54_PEIs sent to the evaluation electronics 62 of the control device 60. If the potential V of the extinguishing agent is_exTo ground potential V_PEPotential difference U between_dBeyond the voltage threshold, the evaluation electronics 62 will detect this potential difference and then output an alarm signal 66 optically and/or acoustically as a result.

The control device 60 also comprises an electromechanical drive element 64 which is controlled by the evaluation electronics 62 and which interrupts the supply of extinguishing agent via the regulating device 30 if the current 42 flowing in the extinguishing agent 20 exceeds a preset current threshold value.

By means of the fire suppressant discharge device 10 according to the invention, measures for effectively suppressing fires using the fire suppressant 20 can be advantageously combined with electrical safety protection measures against electric shocks. When a fire at the electrical installation 2 is extinguished, the electrical safety of the rescuer 4 is improved. Further, the fire extinguishing agent discharging device 10 according to the present invention enables a reduction in a required safety distance, thereby more effectively extinguishing a fire.