KR20010104758A - Form proportioning system of a fire engine - Google Patents

Abstract

The present invention relates to a foam spinning system of a fire truck, comprising: a foam liquid mixing venturi device (33) in which water supplied by a fire pump (3) and foam liquid supplied by the foam liquid pump (4) are mixed; Diaphragm pressure adjustment connected to the water supply line 3a of the fire fighting pump 3 and the foam liquid recovery line 4b of the foam liquid pump 4 and operated by the pressure difference between the two lines 3a and 4b. A valve 17; It is installed in the foam liquid recovery line (4b), by adjusting the supply amount of the foam liquid supplied to the foam liquid mixing venturi device 33 by opening and closing the recovery line (4b) interlocked by the diaphragm pressure regulating valve 25 A diaphragm interlocking foam liquid valve 25 for maintaining a mixed concentration of the set water and the foam liquid; Press the foam discharge switch SW3 (101) to open the suction valve (5), the pressure regulating valves (6, 7) and the recovery valve (8), and press the foam washing switch SW7 (102) to adjust the pressure regulating valve ( 6,7), the cleaning valve (9) is opened, the control pump for opening the pressure regulating valve (6, 7), the recovery valve (8) by pressing the foam suction switch SW9 (103) to the foam pump The diaphragm valve operated by the pressure difference between the foam line and the discharge line of the foamed liquid is controlled to control the amount of foam liquid bypassed to the foam liquid recovery line, thereby minimizing the pressure deviation of the pipe to prevent pulsation during inflow of the foam liquid. And, by improving the inconvenience of the operation to automatically perform the foam spinning, foam washing and foam liquid supply operation to enable the convenience and quick operation of the operator.

Description

Form proportioning system of a fire engine

The present invention relates to a saturating liquid spinning system for spinning a saturating liquid mixed with water and foam liquid, and more specifically, to adjust the concentration of the mixed liquid automatically by using a difference between the water discharge pressure and the foam liquid recovery pressure. The present invention relates to a foam spinning system of a fire truck, which automatically operates spinning, foam piping washing, and foam liquid supply operation for convenient operation.

The foam fire extinguishing system spinning system currently used in Korea is a pump-proporting type for mixing water and foam liquid in the pump by using the principle of self-weight and flow velocity, as shown in FIG. Due to the weight difference and the pressure difference between the suction side and the waterproof side generated from the fire pump, the venturi-type mixing device 33 for mixing the raw material and the water foam is installed.

Although such a system has the advantage of easy installation and convenient operation, although the mixed liquid should generally have a ratio of 97% water, 3% foam or 94% water, and 6% foam, Due to the very large change in pump pressure, it is difficult to form accurate saturated solution, and the extinguishing power is reduced. Second, the mixing of the raw stock solution is unstable, and the waste of foam solution is severe. Third, the suction side of the fire pump 3 is different. If the inhalation is relayed by a fire truck or a fire hydrant increases the waterproof pressure on the suction side there is no pressure difference between the suction side and the waterproof side, there is a problem that can not be used because the foam stock solution is not mixed.

In order to compensate for these disadvantages, as shown in FIG. 2, the foam stock solution flowing from the foam liquid tank 2 is pumped to the foam liquid pump 4 so that the supply pressure of the foam stock solution and the extinguishing water flowing from the fire fighting pump 3 flow. In order to make the saturation liquid in which the ratio of foam and water is constant due to the pressure difference, a foam liquid control valve 25 interlocked with the diaphragm valve 17 is installed. When the water pressure increases, the valve opens to increase the inflow of the foam. As the pressure increases, the valve closes to reduce the inflow of foam.

However, since the foam liquid mixing system is directly controlled by the pressure difference in the supply side line, which is the pressure feed pipe of the foam liquid, the pressure deviation of the pipe is large, and the foam liquid control valve 25 acts directly on the foam liquid pressure change. Due to this, there is a disadvantage in that a pulsation phenomenon frequently occurs in which a difference in the composition density of the water and the foam stock solution occurs.

In addition, in the foam spinning apparatus of the conventional fire truck, as shown in the electrical circuit diagram shown in Figure 3, the suction valve (5 '), pressure adjusting valve (6', 7 '), recovery valve (8'), washing valve ( 9 ') operation is opened and closed independently by each independent switch (SW2' to SW6 '), so that the inlet valve (5'), pressure regulating valve (6 ', 7') The valve 8 'must be opened one by one, and the pressure control valves 6' and 7 'should be opened for cleaning, and the pressure control valve should be opened to supply foam liquid to the foam liquid tank. (6 ', 7'), the recovery valve (8 ') has to be opened one by one, it is very cumbersome, takes a long time, and if the operator is not fully familiar with the system, There are problems such as not being able to.

The object of the present invention devised in view of the above problems is to allow a stable and accurate mixing of water and foam liquid in consideration of various problems generated during spinning of the foam liquid.

Another object of the present invention is to make the foam spinning, foam piping cleaning and foam liquid supply can be easily operated by one switch.

1 is a circuit diagram showing an example of a foam mixing system according to the prior art.

2 is a circuit diagram showing another example of a foam mixing system according to the prior art.

3 is an electrical circuit diagram of a foam mixing system according to the prior art.

4 is a circuit diagram showing a foam mixing system according to the present invention.

5 is a piping circuit diagram of a fire truck to which the foam mixing system according to the present invention is applied.

6 is an electrical circuit diagram of a foam mixing system according to the present invention.

7 is a front view of an operation panel applied to a fire truck according to the present invention.

(Explanation of symbols for the main parts of the drawing)

One ; Water tank 2; Foam Liquid Tank

3; Fire pump 3a; Water supply line

4 ; Foam liquid pump 4b; Foam Liquid Recovery Line

5; Intake valve 6, 7; Pressure regulating valve

8 ; Recovery valve 9; Cleaning valve

14; Water drain 15; Mixed solution water port

17; Diaphragm pressure regulating valves 18, 20; Foam Pressure Inlet Valve

19, 21; Foam pressure relief valve 22; Manual Recovery Valve

23; Manual suction valve 25; Diaphragm Interlocking Foam Liquid Valve

26; Manual pressure regulating valve 27; Mixed liquid pressure gauge

28; Water / foam pressure gauge 29; Foam Recovery Back Pressure Meter

30; Foam suction duct 32; Foam liquid concentration control valve

33; Foam liquid mixing venturi device 34; Waterproof gun

101; Foam spinning switch 102; Foam cleaning switch

103; Foam suction switch 104; Stop switch

105; Manual changeover switch 106; Suction valve switch

107; Pressure regulating valve switch 108; Return Valve Switch

109; Flush Valve Switch

The present invention for achieving the above object is a water tank, a foam liquid tank, a fire pump, a foam liquid pump, a suction valve for opening and closing the connection line between the foam liquid tank and the foam liquid pump, the suction to suck the foam liquid to the foam liquid tank side A recovery valve for opening and closing the line, a washing valve for opening and closing the supply line of the water tank for washing the pipe, a water drain for radiating water discharged by the fire pump, and a mixed liquid waterproof port for discharging a mixture of water and foam liquid And a water spray gun comprising: a foam liquid mixing venturi device in which water supplied by the fire fighting pump and foam liquid supplied by the foam liquid pump are mixed; A diaphragm pressure control valve connected to the water supply line of the fire fighting pump and the foam liquid recovery line of the foam liquid pump and operated by a pressure difference between the two lines; The diaphragm is installed in the foam liquid recovery line, and is linked with the diaphragm pressure regulating valve to control the amount of foam liquid supplied to the foam liquid mixing venturi device side by opening and closing the recovery line to maintain a mixed concentration of the water and the foam liquid. Fram interlocking foam liquid valve; Open the intake valve, the pressure regulating valve and the return valve by pressing the foam discharge switch SW3, open the pressure regulating valve and the washing valve by pressing the foam washing switch SW7, and press the foam suction switch SW9 to open the pressure adjusting valve. And a control circuit for opening the recovery valve.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, of course, the present invention is not limited to these embodiments.

The present invention adjusts the amount of foam liquid supplied in conjunction with the diaphragm pressure control valve 17 in order to mix the water supplied by the fire pump 3 and the foam liquid supplied by the foam liquid pump 4 in the foam liquid mixing venturi device 33. The valve 25 is installed on the foam liquid return line 4b of the foam liquid pump 4, and the diaphragm pressure regulating valve 17 is connected to the water supply line 3a of the fire pump 3 and the foam liquid pump 4. It is configured by connecting to the form liquid recovery line (4b). At this time, the diaphragm pressure regulating valve 17 is operated by the difference between the discharge pressure P1 of the water pumped by the fire fighting pump 3 and the recovery pressure P2 of the foam recovered without being supplied from the foam liquid pump 4. . Reference numeral 4a denotes a foam liquid supply line of the foam liquid pump.

In more detail, when the discharge pressure P1 of the water is larger than the recovery pressure P2 of the foam, the diaphragm pressure regulating valve 17 closes the foam raw liquid amount control valve 25 and the foam liquid recovery line 4b. The amount of foam liquid to be recovered to the foam liquid tank 2 is reduced through increase of the supply amount of the foam liquid to the foam liquid mixing venturi device 33, and on the contrary, when the recovery pressure P2 of the foam is greater than the discharge pressure P1 of water, The liquid amount control valve 25 is opened and the amount of foam liquid recovered to the form tank 2 increases, so that the amount of foam liquid is reduced in the foam liquid mixing venturi device 33 so that the discharge pressure of the water and the foam recovery pressure of the foam are always the same (P1 = P2).

Therefore, the supply amount of the foam liquid mixed with water can be accurately set by the set value of the water discharge pressure P1 and the foam recovery pressure P2, and the foam liquid supply line 4a is detected because the pressure is detected in the foam liquid recovery line 4b. It is possible to detect pulsation in the line by using a shock that is significantly less than in the case of detecting pressure at.

In one embodiment of the foam spinning apparatus of the fire truck according to the present invention to which the foam liquid mixing system according to the above principle is applied, a fire engine was manufactured by forming a pipe of a fire pump and a saturated liquid spinning according to a circuit diagram as shown in FIG. 5. When the structure is demonstrated, it is as follows.

The water tank (1) in which the extinguishing water is stored and the foam liquid tank (2) in which the foam liquid is stored are connected, and a fire pump (3) and a foam liquid pump (4) are installed therebetween. 15) and the waterproof gun 34.

In addition, the water sucked from the water source or pond or fire hydrant is connected to the fire pump (3) by the suction ball cock 11 or relay ball cock (12).

A washing valve 9 and a main ball cock 10 are installed between the water tank 1 and the fire pump 3, and a suction valve 5 between the foam liquid tank 2 and the foam liquid pump 4, Y-strainer (37), which is a filtering network, is installed, and a diaphragm interlocking foam liquid valve (25) interlocked between the foam liquid pump (4) and the fire fighting pump (3) by a diaphragm valve (17) and a diaphragm valve (17). ) And a foam liquid mixing venturi device 33 in which water and foam liquid are mixed. The inlet side line of the foam liquid mixing venturi device 33 is provided with a foam capacity regulating valve 32 and a check valve 31.

A recovery valve 8 and a drain valve 40 are connected to the foam liquid tank 2, a manual suction valve 23 is connected to the intake valve 5, and a manual recovery valve 22 is connected to the recovery valve 8. It is.

The foam fluid pump 4 is provided with a relief valve 16 set to a predetermined pressure (about 18 kg / cm ² ) so as not to be formed above a certain pressure, and a check valve 36 is provided.

On the suction and discharge sides of the diaphragm valve 17, pressure regulating valves 6 and 7, water and foam pressure inlet valves 18 and 20, and water and foam pressure discharge valves 19 and 21 are respectively. It is installed.

In addition, the pressure gauge 38 and the ductometer 39 for measuring the pressure of the fire pump 3, the pressure gauge 27 for measuring the pressure of the foam liquid pump 4, and the adjustment state of the water and foam liquid pressure A discriminating water and foam composite pressure gauge 28, a foam recovery back pressure gauge 29 for checking the state of the recovered foam liquid pressure, and a foam liquid suction ductometer 30 are provided.

In addition, a foam suction ball cock 35 for supplying the foam liquid is connected to the foam liquid tank 2.

In the present invention, a pneumatic solenoid butterfly valve is used as the suction valve 5, the pressure regulating valves 6 and 7, the recovery valve 8, and the washing valve 9 in order to smoothly operate the spinning, washing and suction of the foam liquid. If the fire engine cannot be used in case of malfunction of the electrically operated pneumatic solenoid butterfly valve, an emergency bypass pipe is provided with a manual pressure regulating valve 26, a manual recovery valve 22, and a manual suction valve 23 for emergency use. Respond to fire and disaster.

The operation of the present invention configured as described above will be described with reference to Figs. 5 and 6, which are circuit diagrams, and Fig. 7, which is a front view of the operation panel according to the present invention.

First, in the case of performing the saturation liquid spinning, the contact R3-1, R3-2, R3-3, R3-4 interlocked with the relay R3 is connected by operating the foam spinning switch SW3 101, so that the suction valve 5, The control valves 6 and 7 and the recovery valve 8 are operated.

Therefore, the water discharged from the water tank 1 and sucked by the fire fighting pump 3 and the foam liquid discharged from the foam liquid tank 2 and pumped by the foam liquid pump 4 are discharged by the diaphragm pressure regulating valve 17. By adjusting the opening and closing amount of the foam liquid return line 4b by interlocking the diaphragm-linked foam liquid valve 25, the foam liquid is mixed in the foam liquid mixing venturi device 33 while the supply amount of the foam liquid is adjusted, and the foamed liquid in the state in which the foam liquid is mixed is mixed liquid. It is radiated through the waterproof port 15 or the waterproof gun 34. At this time, the pilot lamps (L2, L3, L4, L5) are turned on, so the operation status of the valve is displayed.The contacts R3-5, R3-6 are disconnected and the lamps L6, L8 and the lamps L1, L7 not switched on are turned off. do.

If you want to clean the pipe after the foam liquid spraying, when the cleaning valve switch SW7 (102) is operated, the contacts R4-1, R4-2, R4-5 connected to the relay R4 is connected to the pressure regulating valve (6, 7), Since the washing valve 9 is opened, the water discharged from the water tank 1 passes through the washing valve 9 and the pressure regulating valves 6 and 7, while washing the inside of the pipe. It is discharged through the gun 34. At this time, the lamps L4, L6, L7 are turned on, and the relays R4-3, R4-4 are short-circuited, and the lamps L1, L8, L5 which do not operate the switch are turned off.

If the amount of foam in the foam liquid tank 2 is insufficient, press the foam suction switch SW9 (103), and the contacts R6-1, R6-2, R6-3 interlocked with the relay R6 are connected to the pressure regulating valve (6). , 7) and the recovery valve 8 are open at the same time, so that the foam liquid introduced from the foam suction ball cock 35 is supplied to the foam liquid tank 2 through the recovery valve 8 via the foam liquid pump 4. . At this time, the pilot lamps L4, L5, L8 are turned on, and the contacts L6-4, R6-5 are short-circuited to turn off the lamps L2, L6 and the lamps L1, L3, L7 which do not operate the switch.

If the temporary stop operation is to be performed during the foam liquid injection operation, the stop switch SW2 104 may be operated to stop the contact R2-1 interlocked with the relay R2 to stop the initial state, and some of the relay and the contact may be operated. If this is unstable, operate the manual power switch SW1 105 to connect the contacts R1-1, R1-2, R1-3, R1-4 connected to the relay R1 to switch SW4 106, SW5 (107). , SW6 (108) and SW8 (109) can be operated to open and close the suction valve (5), pressure regulating valve (6, 7), recovery valve (8), washing valve (9) independently. At this time, each pilot lamp L1, L3, L4, L5, L7 is turned on.

As described above, the saturation liquid spinning system of the fire truck according to the present invention is bypassed to the foam liquid recovery line by a diaphragm valve operated by the pressure difference between the foam line recovery line and the discharge line of the water pumped by the foam pump. By controlling the amount of the foam liquid supplying the foam liquid in a state of minimizing the pressure deviation of the pipe to prevent the pulsation phenomenon when the foam liquid is introduced into the foam liquid supply line, it has the effect of stably mixing water and foam liquid by spinning.

In addition, the present invention also has the effect of enabling the convenience and quick operation of the operator by automatically performing the foam spinning, washing the foam pipe and foam liquid supply operation to improve the inconvenience of operation.

Claims (5)

Suction valve (5) for opening and closing the water tank (1), the foam liquid tank (2), the fire pump (3), the foam liquid pump (4), the connection line between the foam liquid tank (2) and the foam liquid pump (4) And a recovery valve 8 for opening and closing the suction line for sucking the foam liquid to the foam liquid tank 2 side, a washing valve 9 for opening and closing the supply line of the water tank 1 for washing the pipe, and the fire fighting system. In the foam spinning system of a fire truck, the water discharge port 14 which radiates the water discharged by the pump 3, the mixing liquid waterproofing port 15 which discharges the mixed liquid of water and foam liquid, and the waterproof gun 34 are provided. A foam liquid mixing venturi device 33 in which water supplied by the fire fighting pump 3 and foam liquid supplied by the foam liquid pump 4 are mixed; Diaphragm pressure adjustment connected to the water supply line 3a of the fire fighting pump 3 and the foam liquid recovery line 4b of the foam liquid pump 4 and operated by the pressure difference between the two lines 3a and 4b. A valve 17; It is installed in the foam liquid recovery line (4b), by adjusting the supply amount of the foam liquid supplied to the foam liquid mixing venturi device 33 by opening and closing the recovery line (4b) interlocked by the diaphragm pressure regulating valve 25 A diaphragm interlocking foam liquid valve 25 for maintaining a mixed concentration of the set water and the foam liquid; Press the foam discharge switch SW3 (101) to open the suction valve (5), the pressure regulating valves (6, 7) and the recovery valve (8), and press the foam washing switch SW7 (102) to adjust the pressure regulating valve ( 6,7), the cleaning valve 9 is opened, the control circuit for opening the pressure regulating valve (6, 7), the recovery valve (8) in accordance with the pressing of the foam suction switch SW9 (103); Foam spinning system. The method of claim 1, The suction valve (5) is connected to the manual suction valve 23 for manually opening and closing the foam liquid supply line (2a) of the foam liquid tank (2), the recovery valve (8) is a manual foam liquid recovery line (2b) Fire recovery vehicle, characterized in that the manual recovery valve 22 for opening and closing the connection, and the diaphragm pressure control valve 17 is connected to the manual pressure control valve 26 for manually opening and closing the mixed liquid supply line. Foam spinning system. The method of claim 1, Pressure gauge 38 and ductometer 39 for measuring the pressure of the fire pump 3, pressure gauge 27 for measuring the pressure of the foam liquid pump 4, for identifying the adjustment state of the water and foam pressure Compound pressure gauge 28, drainage system 29 for checking the state of the recovered foam liquid pressure and foam liquid suction ductility system 30, characterized in that the system is installed so as to be identified from one operation panel Foam emission system of fire truck. The method of claim 1, The control circuit The solenoid valve of the liquid intake valve 5, the solenoid valve of the pressure regulating valves 6 and 7, and the solenoid valve of the recovery valve 8 are driven while the form radiation switch SW3 (101) is pressed and continuously driven. Relay R3; A relay R4 for driving the solenoid valves of the pressure regulating valves 6 and 7 and the solenoid valves of the washing valve 9 while the foam washing switch SW7 102 is pressed and continuously driven; A relay R6 for driving the solenoid valves of the pressure regulating valves 6 and 7 and the solenoid valves of the recovery valve 8 while the form suction switch SW9 103 is pressed and continuously driven; Contacts R3-5 and R3-6 of the relay R3 which release the magnetic contacts of the relays R4 and R6 when the relay R3 is driven; Contacts R4-3 and R4-4 of the relay R4 which release the magnetic contacts of the relays R3 and R6 when the relay R4 is driven; Foam fire system of a fire truck characterized in that it comprises the contacts R6-4, R6-5 of the relay R6 for releasing the magnetic contacts of the relays R3 and R4 when the relay R3 is driven. The method according to claim 1 or 4, The control circuit includes a relay R2 for stopping the device in an initial state by opening the contact R2-1 by pressing the stop switch SW2 104; When the manual changeover switch SW1 (105) is pressed, the magnetic contact points (R1-1, R1-2, R1-3, R1-4) are formed to intake valve switch SW4 (106), pressure regulating switch SW5 (107), and recovery valve. By independently operating the switch SW6 108 and the washing valve switch SW8 109, the suction valve 5, the pressure regulating valves 6 and 7, the recovery valve 8 and the washing valve 9 are independently operated. Foam emission system of a fire truck comprising a relay R1.