JP6239454B2 - Mixer for foam fire extinguishing equipment - Google Patents

Description

  The present invention relates to a mixer for mixing water and a foam fire-extinguishing agent used in a foam fire-extinguishing facility. Of course, the foam fire extinguishing equipment using the mixer of the present invention includes a foam aqueous solution that is discharged from the discharge head in the form of foam, and the foam aqueous solution is sprayed from the discharge head in a liquid state. It also includes those that release.

  Foam extinguishing equipment is installed in places where there is a risk of fires that are difficult to extinguish with water such as oil fires. Such a foam extinguishing equipment is provided with a mixer for mixing the water from the water storage tank with the foam fire extinguishing chemical from the chemical tank to generate a foam aqueous solution in the middle of the pipe (for example, Patent Document 1). And 2).

  There are various types of mixers for foam fire extinguishing equipment. Usually, the water inlet, the foam extinguishing agent inlet, and the foam aqueous solution outlet are always in communication. When water flows in from the inflow port, the foam extinguishing agent flows in from the inflow port, and is mixed inside to become a foam aqueous solution and flows out from the outflow port (see, for example, Patent Document 2). ). In addition, the mixer of the conventional foam extinguishing equipment has a mechanism for adjusting the amount of the foam extinguishing agent flowing in from the inflow port of the foam extinguishing agent according to the amount of water flowing in from the inflow port of water. There are some which can mix water and a foam fire extinguishing agent at a constant ratio even if the amount changes (for example, refer to Patent Document 2).

JP 2001-000573 A JP 2006-223527 A

  By the way, in the foam fire extinguishing equipment, the water supply side pipe where the mixer is provided is always kept in a filled state at a predetermined pressure, but in the case of equipment called wet, a closed discharge head is provided. The discharge-side piping that is provided is always in a charged state at a predetermined pressure. In such wet foam fire extinguishing equipment, during monitoring, when the charging pressure in the discharge pipe becomes higher than a predetermined charging pressure (the cause is an increase in environmental temperature, etc.). In order to lower the water pressure, the foam aqueous solution filled in the pipe on the discharge side may be discharged (see, for example, Patent Document 1).

  However, when the foam aqueous solution filled in the discharge-side pipe is drained to lower the charge pressure in the pipe, the charge pressure may be lowered below a predetermined pressure (for example, the environment) When the temperature rises, the foam aqueous solution filled in the pipe on the discharge side is drained, and then the filling pressure in the pipe becomes lower than a predetermined pressure when the environmental temperature decreases. Even in such a case, the pressurized water from the water storage tank is replenished in the piping by the pressurizing means such as an auxiliary pressurizing device, and the once-reduced water pressure can be raised to a predetermined pressure. However, as described above, when the water flows in from the inlet, the foam extinguishing agent flows in from the inlet. When the pressurized water is replenished from the water storage tank in order to keep the filling pressure in the pipe at a predetermined pressure by being mixed inside and becoming a foam aqueous solution and flowing out from the outlet. A foam fire extinguishing agent is also replenished from the medicine tank.

  For this reason, in the foam extinguishing equipment equipped with the conventional mixer, when monitoring, the foam extinguishing agent is also supplied from the chemical tank when pressurized water is replenished from the water storage tank in order to keep the charging pressure in the pipe at a predetermined pressure. In addition, there is a problem that the foam extinguishing chemical in the chemical tank, which is limited, is replenished. This problem also exists in the case where water and a foam fire-extinguishing agent can be mixed at a constant ratio even if the amount of water changes. In addition, the phenomenon that the filling pressure in the pipe decreases may occur not only when the foam aqueous solution in the pipe is intentionally drained as described above, but also due to unintentional leakage of the foam aqueous solution from the pipe.

  This invention aims at providing the mixer for foam fire extinguishing equipment which can prevent reducing a foam fire extinguishing agent at the time of monitoring in view of the said situation.

The present invention mixes a water inlet into which water flows in, a chemical inlet into which a foam extinguishing agent flows in, water flowing in from the water inlet and a foam extinguishing agent flowing in from the chemical inlet, thereby generating an aqueous foam solution. And a mixer for a foam fire-extinguishing facility having an outlet from which an aqueous foam solution generated by the mixing unit flows out, the water for controlling the amount of water flowing into the mixing unit from the water inlet A proportional valve having a regulating valve part, a proportional valve having a chemical regulating valve part for controlling the amount of foam extinguishing chemical flowing into the mixing part from the chemical inlet, and a communication port communicating with the chemical inlet, And a cylinder portion having an opening through which the adjustment valve portion for medicine is inserted, and the proportional valve is moved to respond to the amount of water flowing into the mixing portion from the water inlet. From the drug inlet. In mixer for foam extinguishing system further has a mixing ratio adjustment mechanism to adjust the amount of foam agent flowing into the mixing section via the Sunda portion, agents blocking valve to an open and a closed opening of the cylinder portion The monitoring valve closes the opening of the cylinder part at the time of monitoring and prevents the foam fire-extinguishing agent from flowing into the mixing part through the cylinder part from the chemical inlet, and at the time of fire and wherein the medicament prevents valve opens the opening of the cylinder portion, foam medicament from the medicament inlet through the cylinder portion is provided with a drug blocking mechanism that allows to flow into the mixing unit It is a mixer for foam fire extinguishing equipment.

The present invention also provides a foam aqueous solution by mixing a water inlet into which water flows, a chemical inlet into which a foam extinguishing agent flows, water flowing in from the water inlet and a foam extinguishing agent flowing in from the chemical inlet. In a mixer for foam fire extinguishing equipment having a mixing section for generating water and an outlet through which the aqueous foam solution generated by the mixing section flows out , the amount of the foam extinguishing agent flowing into the mixing section from the chemical inlet is controlled. And a drug blocking valve for closing and opening an opening between the drug inlet and the mixing unit, and the drug blocking valve is connected to the drug inlet during monitoring. The opening between the mixing part is closed to prevent the foam fire-extinguishing chemical from flowing into the mixing part from the chemical inflow port, and in the event of a fire, the chemical prevention valve is pressed against the chemical adjustment valve part. move Te, an opening between the drug inlet and said mixing unit Release, a mixer for foam equipment foam agent is characterized in that a drug blocking mechanism that allows to flow into the mixing part from the drug inlet.

  Further, the present invention is the foam fire-extinguishing equipment mixer, wherein the medicine blocking valve is positioned so that a predetermined space is formed between the medicine prevention valve and the medicine regulating valve section at the time of monitoring. is there.

In addition, the present invention has a communication port that communicates with the drug inflow port, a cylinder unit that communicates with the mixing unit, and has an opening through which the adjustment valve unit for the drug is inserted . A mixer for a foam fire-extinguishing equipment, wherein the seating portion is seated in close contact with a valve seat portion provided around the cylinder portion, thereby closing the opening of the cylinder portion so as to be sealed. It is.

  According to the present invention, the foam fire-extinguishing agent flows from the chemical inlet into the mixing unit in the event of a fire, while the chemical blocking valve prevents the foam extinguishing chemical from flowing into the mixing unit into the mixing unit during monitoring. it can.

  Therefore, according to this invention, it is possible to obtain a mixer for a foam extinguishing facility that can prevent a foam extinguishing agent from being reduced during monitoring while allowing the mixer to function normally in a fire.

FIG. 1 shows an example (first embodiment) of an embodiment of the present invention, and is a sectional view of the entire mixer. This is the same as above, and when monitoring, there is no running water, the drug adjustment valve part is in the initial position, and the cross section of the main part of the mixer when the drug blocking valve closes the cylinder opening FIG. This is the same as above. During monitoring, there is a slight amount of running water, and the adjustment valve for the medicine moves and the slit is positioned slightly facing the inside of the cylinder, but the medicine blocking valve closes the cylinder opening. It is sectional drawing of the principal part of a mixer when it exists in the state which is carrying out. In the event of a fire, there is a low flow of water, and the adjustment valve part for the medicine moves and the slit faces the inside of the cylinder part, and the adjustment valve part for the medicine. It is sectional drawing of the principal part of a mixer when it exists in the state which has been open | released and the chemical | medical agent prevention valve moves and has opened the opening of the cylinder part. In the event of a fire, there is a large flow of water, and the drug adjustment valve moves to the position where the slit faces the inside of the cylinder, and the drug adjustment valve It is sectional drawing of the principal part of a mixer when it exists in the state which has been open | released and the chemical | medical agent prevention valve moves and is opening the opening of a cylinder. FIG. 9 is a cross-sectional view of a main part of a mixer corresponding to FIG. 2, showing another example (second embodiment) of the embodiment of the present invention. FIG. 7 is a sectional view of a main part of a mixer corresponding to FIG. 2, showing still another example (third embodiment) of the embodiment of the present invention. It is the systematic diagram which showed an example of the system configuration | structure of the foam fire extinguishing equipment in which this invention is used.

  About embodiment of the mixer of this invention, it is a mixer which mixes water and a foam fire-extinguishing agent by a predetermined ratio, and produces | generates foam aqueous solution, Comprising: Even if the flow volume of water changes, water and foam fire-extinguishing agent An example will be described in which the present invention is applied to a so-called proportional mixing mixer configured to keep the mixing ratio constant.

  First, a mixer 1-1 according to a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 shows the entire mixer 1-1 (refer to FIG. 2 for details). As shown in the figure, the mixer 1-1 has a main body 2 formed in an elbow shape as a whole, a water inlet 3 through which water flows into the main body 2, and a chemical inlet 4 through which foam extinguishing agent flows. A mixing unit 5 that mixes the water flowing in from the water inlet 3 and the foam extinguishing agent flowing in from the chemical inlet 4 to generate a foam aqueous solution, and an outlet 6 from which the foam aqueous solution generated by the mixing unit 5 flows out have.

  The mixer 1-1 is a proportional mixing type mixer as described above, and is a mixing ratio adjusting mechanism 7 provided between the water inlet 3 and the drug inlet 4 and includes one of the shafts 8. The amount of the foam fire-extinguishing agent flowing into the mixing unit 5 from the chemical inlet 4 at the other end has the water adjustment valve unit 9 for controlling the amount of water flowing into the mixing unit 5 from the water inlet 3 at the end. A proportional valve 11 having an adjustment valve portion 10 for controlling the drug, a communication port 12d communicating with the drug inlet 4, and an opening 12c communicating with the mixing portion 5 through which the adjustment valve portion 10 for medicine is inserted. The proportional valve 11 moves forward and backward according to the amount of water flowing into the mixing unit 5 from the water inlet 3 and thereby flows into the mixing unit 5 from the chemical inlet 4 via the cylinder 12. And a mixing ratio adjusting mechanism 7 for adjusting the amount of foam extinguishing agent .

  And the mixer 1-1 is the chemical | medical agent blocking mechanism 15 provided in the inside of the cylinder part 12 so that it can prevent reducing a foam fire extinguishing chemical | drug | medicine at the time of monitoring, Comprising: A medicine blocking valve 16 that opens is provided, and at the time of monitoring, the medicine blocking valve 16 closes the opening 12c of the cylinder portion 12, and the foam fire-extinguishing agent flows into the mixing portion 5 from the drug inlet 4 through the cylinder portion 12. Is blocking. On the other hand, in the event of a fire, in the mixer 1-1, the chemical blocking valve 16 opens the opening 12c of the cylinder part 12, and the foam fire-extinguishing chemical flows into the mixing part 5 from the chemical inflow port 4 through the cylinder part 12. The medicine blocking mechanism 15 that allows the

  Here, in the present embodiment, the mixing ratio adjusting mechanism 7 is inserted into the opening 12 c of the cylinder portion 12 as the drug adjusting valve portion 10 of the proportional valve 11 and is one of the sides entering the inside of the cylinder portion 12. Is a cylindrical valve body that is closed at the other end and opened at the other end located inside the mixing portion 5, and has an elongated shape that extends in the axial direction on the side portion. What was comprised by the valve body which has the slit 10a which is a substantially rectangular hole is used.

  In the mixing ratio adjusting mechanism 7, the proportional valve 11 is always urged by an urging member (for example, a coil spring) 13 that urges the water adjusting valve portion 9 in the closing direction. If there is no inflow of water, the urging force of the urging member 13 keeps the water adjustment valve portion 9 at a position where the water inlet 3 is closed, and the slit 10a for the drug adjustment valve portion 10 is the cylinder portion 12. It is designed to maintain a position that does not face the inside. On the other hand, in the event of a fire, if there is an inflow of water from the water inlet 3, the proportional valve 11 moves the water adjustment valve portion 9 to the water inlet 3 on the mixing portion 5 side against the biasing force of the biasing member 17. The medicine adjustment valve portion 10 is moved to a position where the slit 10a on the cylinder portion 12 side faces the inside of the cylinder portion 12 while being moved to the opening position (right side in FIG. 1).

  In the event of a fire, if the slit 10a of the adjustment valve portion 10 for the medicine in the proportional valve 11 is in a position facing the inside of the cylinder portion 12, the foam fire-extinguishing agent from the agent inlet 4 is used for the medicine through the cylinder portion 12. The foam extinguishing chemical flows into the chemical regulating valve portion 10 and then supports the biasing member 13 of the proportional valve 11 from its open end. At the same time, it flows out into the cylindrical support member 23 that accommodates the drug adjustment valve portion 10 inside, and further flows out into the mixing portion 5 from the opening 23 a of the support member 23. That is, in the present embodiment, in the event of a fire, the foam extinguishing chemical supplied from the chemical inflow port 4 flows into the mixing unit 5 through the cylinder part 12, the chemical adjustment valve 10 and the support member 23 in order. It has become. And it mixes with the water which flows in from the water inflow port 3 in the mixing part 5, becomes a foam aqueous solution, and flows out outside from the mixing part 5 in the main body 2 through the outflow port 6.

  In the present embodiment, the drug blocking mechanism 15 serves as the drug blocking valve 16 while covering the opening 12c of the cylinder portion 12 from the inside to the closed end portion of the drug adjusting valve portion 10 on the cylinder portion 12 side. A valve seat is used which is closed and opened, and has a cap shape (lid shape) as a whole, and is formed around the opening 12c of the cylinder portion 12 at the open end of the peripheral wall. A seating portion 16a seated on the portion 12e is used, and the opening and closing of the opening 12c of the cylinder portion 12 is opened and closed by moving back and forth in the direction along the moving direction of the drug regulating valve portion 10 of the proportional valve 11. Further, in the event of a fire, when the drug adjustment valve portion 10 of the proportional valve 11 moves to the cylinder portion 12 side, the drug prevention mechanism 15 presses the drug adjustment valve portion 10 against the inner surface of the closed end wall. What has the pressure receiving part 16b which the part 10b contact | abuts is used. Thereby, at the time of a fire, the medicine blocking mechanism 15 is pressed and moved by the medicine adjustment valve section 10 to open the opening 12c of the cylinder section 12. On the other hand, at the time of monitoring, the medicine blocking mechanism 15 is positioned so that a space is formed between the pressure receiving portion 16b and the pressing portion 10b of the medicine adjusting valve portion 10, and the medicine adjusting valve is provided by the space. Even if the part 10 moves to the cylinder part 12 side, the state where the opening 12c of the cylinder part 12 is closed is maintained.

  In the drug blocking mechanism 15, the drug blocking valve 16 is always biased by a biasing member (for example, a coil spring) 17 that biases it in the closing direction. And the chemical | medical agent prevention valve 16 is maintained in the position which closes the opening 12c of the cylinder part 12 by the biasing force of the biasing member 17 at the time of monitoring, and resists the biasing force of the biasing force 19 at the time of a fire, The opening 12c of the cylinder part 12 is opened by being moved by being pressed by the adjustment valve part 10 for medicine.

  FIG. 2 is an enlarged view of a portion including the drug blocking mechanism 15 of the mixer 1-1. At the time of monitoring, the foam extinguishing equipment piping is in a normal state filled with a predetermined pressure, and the water inlet 3 It shows the state when there is no inflow of water.

  As shown in FIG. 2, when monitoring, the foam extinguishing equipment piping is in a normal state where water is filled with a predetermined pressure, and there is no inflow of water from the water inlet 3. The slit 10a of the adjustment valve part 10 for the medicine of the proportional valve 11 is in a position where it does not face the inside of the cylinder part 12, and the medicine prevention valve 16 in the medicine prevention mechanism 15 is in a position for closing the opening 12c of the cylinder part 12. . That is, the drug adjustment valve portion 10 of the proportional valve 11 in the mixer adjustment mechanism 7 is in a state where the end side on the closed side is inserted through the opening 12 c of the cylinder portion 12, but the slit 10 a is inside the cylinder portion 12. It is in a position that does not reach the interior. The drug blocking valve 16 in the drug blocking mechanism 15 is in a position where the seating portion 16a is seated on the valve seat portion 12e around the opening 12c of the cylinder portion 12 and the opening 12c of the cylinder portion 12 is closed. .

  Thereby, if it is in a normal state at the time of monitoring, the foam fire-extinguishing chemical is transferred from the chemical inflow port 4 to the inside of the cylinder portion 12 through the communication port 12d of the cylinder portion 12 as indicated by a continuous arrow in the drawing. However, the medicine blocking valve 16 that is in a state in which the opening 12c of the cylinder portion 12 is closed is not reached first.

  During normal monitoring, the aforementioned state is maintained by the biasing member 13 for the drug regulating valve portion 10 and maintained by the biasing member 17 for the drug blocking valve 16, but the drug blocking valve 16 is maintained. The space formed between the pressure receiving portion 16b and the pressing portion 10b of the pharmaceutical adjustment valve portion 10 is also maintained as it is.

  FIG. 3 is an enlarged view of the same part, and shows the state at the time of monitoring. FIG. 3 shows a case where pressurized water replenishment means such as an auxiliary pressure device of a foam fire extinguishing device is activated at the time of monitoring. This shows the state when pressurized water is replenished and water flows in.

  As shown in FIG. 3, when pressurized water is replenished at the time of monitoring and there is an inflow of water from the water inlet 3, the drug adjustment valve portion 10 of the proportional valve 11 moves to the cylinder portion 12 side, Although there is a slight amount, the slit 10a is in a position facing the inside of the cylinder part 12, but the space between the pressing part 10b of the drug adjusting valve part 10 and the pressure receiving part 16b of the drug blocking valve 16 is narrow. However, the space is maintained as a space. That is, unless the pressing portion 10b of the drug blocking valve 10 presses and moves the pressure receiving portion 16b of the drug blocking valve 16 to the open side, the state of the drug blocking valve 10 closing the opening of the cylinder portion 12 is maintained. It will be.

  Thus, even when pressurized water is replenished at the time of monitoring and there is an inflow of water from the water inlet 3, the foam extinguishing agent flowing in from the chemical inlet 4 is the same as in the normal monitoring shown in FIG. As shown by the continuous arrow in the drawing, the opening 12c of the cylinder portion 12 is closed, although it extends from the drug inlet 4 to the inside of the cylinder portion 12 through the communication port 12d of the cylinder portion 12. A certain drug blocking valve 16 is not reached before.

  Fig. 4 is an enlarged view of the same part, but Fig. 4 shows that in the event of a fire, the main pressurized water supply device of the foam fire extinguishing equipment is activated and water is supplied at a low flow rate. This shows the state in the case of

  As shown in FIG. 4, in the event of a fire, if there is an inflow of low flow rate water from the water inlet 3, the chemical adjustment valve portion 10 of the proportional valve 11 moves toward the cylinder portion 12 side by the low flow rate. As a result, the slit 10a is in a position facing the inside of the cylinder part 12, and the pressing part 10b of the drug adjusting valve part 10 presses the drug blocking valve 16 while abutting the pressure receiving part 16b of the drug blocking valve 16. Then, the medicine blocking valve 16 is in a position to open the opening 12c of the cylinder portion 12.

  Thus, in the event of a fire, if a low flow rate of water flows from the water inlet, the foam extinguishing agent supplied to the chemical inlet 4 is transferred from the chemical inlet 4 to the cylinder as indicated by the continuous arrow in the drawing. The adjustment valve portion 10 for medicine is provided inside the cylinder portion 12 through the communication port 12d of the portion 12 to the inside of the cylinder portion 12 and beyond the medicine prevention valve 16 in the state where the opening 12c of the cylinder portion 12 is opened. From the slit 10a, the amount is limited thereby, and reaches the inside of the adjustment valve portion 10 for medicine and the inside of the mixing portion 5.

  FIG. 5 is an enlarged view of the same part, and shows the state at the time of fire. In FIG. 5, the main pressurized water supply device of the foam fire extinguishing equipment is activated at the time of fire, It shows the situation when there is a supply and there is an inflow of water.

  As shown in FIG. 5, in the event of a fire, if there is a large flow of water flowing in from the water inlet 3, the chemical adjustment valve unit 10 of the proportional valve 11 moves toward the cylinder unit 12 by the large flow rate. As a result, the slit 10a is in a position facing the inside of the cylinder part 12, and the pressing part 10b of the drug adjusting valve part 10 presses the drug blocking valve 16 while abutting the pressure receiving part 16b of the drug blocking valve 16. Then, the medicine blocking valve 16 is in a position to open the opening 12c of the cylinder portion 12. In the state shown in FIG. 5, the amount of water flowing in from the water inlet 3 is a large flow rate, so that the adjustment of the proportional valve 11 for medicine is compared with that shown in FIG. 4, which is a low flow rate. The valve portion 10 has moved greatly toward the cylinder portion 12, and the slit 10 a is made to largely face the inside of the cylinder portion 12.

  Thus, in the event of a fire, if there is a large flow of water inflow from the water inlet, the foam extinguishing agent supplied to the agent inlet 4 is shown in FIG. 4 as indicated by the continuous arrow in the drawing. As shown in FIG. 4, the amount of water flowing in from the water inlet 3 is a large flow rate and is shown in FIG. 4 through the slit 10 a of the pharmaceutical adjustment valve portion 10. A larger amount than the above reaches the mixing section 5.

  As described above, in the mixer 1-1 of the present invention, during monitoring, the medicine blocking valve 16 closes the opening 12 c of the cylinder part 12, and the foam fire-extinguishing medicine is supplied from the medicine inlet 4 through the cylinder part 12. In the event of a fire, the chemical blocking valve 16 opens the opening 12c of the cylinder part 12, and the foam extinguishing chemical flows into the mixing part 5 from the chemical inlet 4 through the cylinder part 12. A drug blocking mechanism 15 that allows the user to do so is provided. Accordingly, the foam extinguishing agent flows into the mixing unit 5 from the chemical inlet 4 in the event of a fire, while the foam blocking agent 16 flows into the mixing unit 5 by the chemical blocking valve 16 during monitoring. It is possible to prevent the foam extinguishing agent from being reduced at the time of monitoring while securing the necessary function as a mixer in the event of a fire.

  The mixer 1-1 of this embodiment will be described in more detail.

  In this embodiment, the cylinder 12 part is a cylindrical shape provided so as to extend outward along the axial direction of the proportional valve 11 from the side wall facing the water inlet 3 near the corner of the elbow-shaped main body 2. The extension portion 20 (see FIGS. 1 and 2) is provided so that its axis is located on the same axis as the axis of the proportional valve 11.

  In the present embodiment, the cylinder portion 12 is supported by a support member 21 fixed by screwing to the opening 20a and assembled into the extension portion 20. It is screwed by a through screw portion 12f penetrating through it, and is provided so as to be movable back and forth in the axial direction within the extending portion 20 by turning the through screw portion 12f. Thereby, the cylinder part 12 can adjust the positional relationship of the axial direction with the adjustment valve 10 for the medicine of the proportional valve 11, and the pressing part 10 b of the adjustment valve part 10 for the medicine and the medicine blocking valve 16. The length of the space between the pressure receiving portion 16b and the length of the slit 10a of the medicine adjustment valve portion 10 facing the inside of the cylinder portion 12 can be adjusted. Reference numeral 22 denotes a cap that covers the head of the through screw portion 12f that penetrates the support member 21 and is exposed to the outside.

  Further, in the present embodiment, the cylinder part 12 is composed of two pieces of an inner cylinder part 12a and an outer cylinder part 12b, an opening 12c is provided in the inner cylinder part 12a, and a communication port 12d and a through screw are provided in the outer cylinder part 12b. A portion 12f is provided. Since the cylinder part 12 is composed of two pieces, the medicine blocking mechanism 15 such as the medicine blocking valve 16 can be easily assembled therein.

  Further, in the present embodiment, the cylinder portion 12 is assembled as a product by assembling the medicine prevention mechanism 15 such as the medicine prevention valve 16 and the like, and in that state, the cylinder portion 12 is inserted into the inside from the opening 20a of the extension portion 20 to support the member 21 It can be assembled by screwing. As a result, it is possible to easily assemble a part related to the cylinder part 12, and conversely, it is possible to easily disassemble the part.

  Further, in the present embodiment, the drug blocking valve 16 is provided with a protruding portion 16c protruding forward on an end wall on the closing side, and a biasing member 17 is provided along the side wall of the protruding portion 16c. ing. Further, a screw for attaching the medicine adjustment valve portion 10 is provided on the closing side end portion of the medicine adjustment valve portion 10, but a space is formed inside the protruding portion 16c of the medicine prevention valve 16, and the medicine adjustment valve portion is formed. Even if a screw is provided at the end of the closed mold 10, the pressing part 10 b of the drug regulating valve 10 can be brought into contact with the pressure receiving part 16 b of the drug blocking valve 16 as shown in FIG. 4 or 5. It is like that.

  Next, a mixer 1-2 according to a second embodiment of the present invention will be described with reference to FIG.

  The mixer 1-2 of the second embodiment is further provided with a guide rod 10c protruding forward at the closing side end of the drug regulating valve 10, and a guide hole 16d inside the protrusion 16c of the drug blocking valve 16. The other configurations are the same as those of the mixer 1-1 of the first embodiment.

  Specifically, in this embodiment, the guide rod 10c of the drug regulating valve 10 slides in the guide hole 16d of the drug blocking valve 16 as the drug regulating valve 10 moves. When the drug regulating valve 10 moves to open and close the drug blocking valve 16, it is possible to prevent the axis of the drug blocking valve 16 from shifting.

  Next, a mixer 1-3 according to a third embodiment of the present invention will be described with reference to FIG.

  A mixer 1-3 according to the third embodiment is provided with a drug adjusting valve portion 14 configured by a conical valve body in place of the drug adjusting valve portion 10 in the proportional valve 11. Other configurations are the same as those of the mixer 1-1 of the first embodiment.

  Also in the present embodiment, the function of the drug blocking valve 16 of the drug blocking mechanism 15 at the time of monitoring is the same as that of the mixer 1-1 of the first embodiment, and the cylinder valve 12 of the drug adjusting valve unit 14 is used, for example. By setting the end portion on the side to the pressing portion 14a that presses the pressure receiving portion 16b of the drug blocking valve 16, the function at the time of a fire can be the same as that of the mixer 1-1 of the first embodiment.

  Note that, in the medicine adjusting valve portion 14 configured by the conical valve body of the present embodiment, the conical valve body moves forward and backward in the opening 12c of the cylinder portion 12 according to the amount of water flowing in. Thus, the area of the annular gap formed between the opening 12c of the cylinder portion 12 changes, and thereby the amount of the foam fire-extinguishing agent flowing into the mixing portion 5 can be adjusted.

  Finally, an example of the system configuration of the foam fire extinguishing equipment in which the mixer of the present invention is used will be briefly described with reference to FIG. 8 is a so-called wet type in which the inside of the discharge pipe 103 on the secondary side of the water flow detection device 102 provided with the closed discharge head 101 is filled with water from the monitoring time. Equipment.

  The foam fire extinguishing equipment 100 includes a water storage tank 105 and a water tank 105 in the water storage tank 105 from the base end side to the primary side pipe 104 of the water flow detection device 102 at the base end of the secondary side pipe 103 provided with the closed type discharge head 101. When the normal filling water pressure in the pump 106 for pressurizing and feeding water, the water pressure switching device 107 for starting the pump 104, and the primary side pipe 104 and the secondary side pipe 103 falls below a predetermined pressure. An auxiliary pressurizing pump 108 that starts and pressurizes the filling water pressure in these pipes, a chemical tank 109 that stores foam extinguishing chemicals, and water from the water storage tank 105 and foam extinguishing chemicals from the chemical tank 109 A mixer that generates a foam aqueous solution by mixing, and includes a mixer 110 to which the mixer of the present invention can be applied. In addition, this foam fire extinguishing equipment 100 receives the flowing water signal from the pump control panel 111 for controlling the pump 106 and the flowing water detection device 102 as an electric system, and transmits the activation signal of the pump 106 to the pump control panel 111. It further includes a fire receiver 112, an alarm bell 113, and the like.

  In the wet foam extinguishing equipment 100, when monitoring, the secondary side pipe 103 is kept in a charged state at a predetermined pressure, and when the charged water pressure in the secondary side pipe 103 is lower than the predetermined pressure, The auxiliary pressurization pump 108 is activated, the primary side pipe 104 is pressurized, and the mixer 110 is supplied with pressurized water. However, if the mixer of the present invention is used as the mixer 110, even if pressurized water is replenished to the mixer 110, the chemical blocking valve of the chemical blocking mechanism prevents the foam fire-extinguishing chemical from flowing into the mixing section. can do.

  On the other hand, in the foam fire extinguishing equipment 100, when the pump 106, which is the main pressurized water supply device, is activated in the event of a fire, the drug blocking valve of the drug blocking mechanism fires even if the mixer of the present invention is used as the mixer 110. Sometimes the foam can be allowed to flow into the mixing part, and the foam can be normally allowed to flow into the mixing part.

  In other words, if the mixer of the present invention is used as the mixer 110 in the foam fire extinguishing equipment 100, the foam fire extinguishing agent in the chemical tank 109 that is finite at the time of monitoring while allowing the mixer 110 to function normally during a fire. Can be reduced.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment.

  For example, the mixer of the present invention can be applied to a mixer that is not a proportional mixing type. Although illustration of a specific example is omitted, if the description is made with reference to the constituent parts of the above embodiment, even if there is no constituent part related to the proportional valve 11, by adjusting the biasing force of the biasing member 17 and the like. The main pressure water supply device is not opened by the flowing water pressure due to the inflow of pressurized water by an auxiliary pressurizing device or the like, instead of opening the medicine blocking valve 16 for closing and opening the opening 12c between the medicine inlet 4 and the mixing unit 5. If the flowing water pressure due to the inflow of pressurized water is opened (it may be opened electrically), the opening 12c between the drug inlet 4 and the mixing unit 5 is closed by the drug blocking valve 16 during monitoring. Then, the foam fire-extinguishing agent is prevented from flowing into the mixing unit 5 from the drug inflow port 4, and in the event of a fire, the opening between the drug inflow port 4 and the mixing unit 5 is caused by the inflow of pressurized water by the main pressurized water supply device. 12c is opened and the drug inlet 4 Foam agent can be allowed to flow into the mixing unit 5.

1-1: Mixer (first embodiment) 1-2: Mixer (second embodiment)
1-3: Mixer (3rd Embodiment) 2: Main body 3: Water inflow port 4: Chemical inflow port 5: Mixing part 6: Outlet 7: Mixing ratio adjustment mechanism 8: Shaft 9: Water adjustment valve part 10 : Adjustment valve part for medicine 10a: Slit 10b: Pressing part 10c: Guide rod (second embodiment) 11: Proportional valve 12: Cylinder part 12a: Inner cylinder part 12b: Outer cylinder part 12c: Opening 12d: Communication port 12e : Valve seat part 12f: Through screw part 13: Energizing member (for proportional valve) 14: Adjustment valve part for medicine (third embodiment)
14a: Pressing portion (third embodiment) 15: Drug blocking mechanism 16: Drug blocking valve 16a: Seating portion 16b: Pressure receiving portion 16c: Protruding portion 16d: Guide hole (second embodiment) 17: Biasing member ( (For drug blocking valve)
20: Extension part 20a: Opening 21: Support member 22: Cap 23: Support member 23a: Opening 100: Foam extinguishing equipment 101: Discharge head
102: Flowing water detection device 103: Secondary side piping 104: Primary side piping 105: Water storage tank 106: Pump 107: Water pressure switching device 108: Auxiliary pressure pump 109: Chemical tank 110: Mixer 111: Pump control panel 112: Fire Receiver 113: Alarm bell

Claims (4)

A water inlet into which water flows, a chemical inlet into which foam extinguishing agent flows, a mixing unit that mixes water flowing in from the water inlet and foam extinguishing agent flowing in from the chemical inflow port to generate an aqueous foam solution; A mixer for foam fire extinguishing equipment having an outlet through which the aqueous foam solution generated by the mixing unit flows out, and a water adjustment valve unit for controlling the amount of water flowing into the mixing unit from the water inlet And a proportional valve having a drug adjustment valve that controls the amount of foam extinguishing agent flowing from the drug inlet into the mixing unit, a communication port communicating with the drug inlet, and the mixing unit And a cylinder portion having an opening through which the adjustment valve portion for medicine is inserted, and the proportional flow of the proportional valve moves, thereby allowing the medicine flow according to the amount of water flowing into the mixing portion from the water inlet. From the inlet through the cylinder In the mixer for further foam extinguishing system having a mixing ratio adjustment mechanism to adjust the amount of foam agent flowing into the mixing section Te,
A chemical blocking valve that closes and opens the opening of the cylinder part is provided, and at the time of monitoring, the chemical blocking valve closes the opening of the cylinder part, and the foam extinguishing chemical from the chemical inlet through the cylinder part Is prevented from flowing into the mixing part, and in the event of a fire, the chemical blocking valve opens the opening of the cylinder part, and the foam fire-extinguishing chemical flows into the mixing part from the chemical inlet through the cylinder part. A mixer for a foam fire-extinguishing equipment, characterized in that a drug blocking mechanism that allows the foaming to fire is provided. A water inlet into which water flows, a chemical inlet into which foam extinguishing agent flows, a mixing unit that mixes water flowing in from the water inlet and foam extinguishing agent flowing in from the chemical inflow port to generate an aqueous foam solution; In the mixer for foam fire extinguishing equipment having an outlet from which the aqueous foam solution generated by the mixing unit flows out,
An adjustment valve portion for a medicine that controls the amount of the foam fire-extinguishing agent flowing into the mixing portion from the medicine inlet is provided,
In addition, a medicine blocking valve that closes and opens an opening between the drug inlet and the mixing unit is provided, and when monitoring, the drug blocking valve opens an opening between the drug inlet and the mixing unit. Closes and prevents the foam fire-extinguishing agent from flowing into the mixing part from the medicine inlet, and in the event of a fire, the medicine blocking valve is pushed by the medicine adjustment valve part and moves, and the medicine inlet and A mixer for a foam fire extinguishing equipment, characterized in that a chemical blocking mechanism is provided which opens an opening between the mixing section and allows a foam fire extinguishing chemical to flow into the mixing section from the chemical inlet. . The mixer for foam fire extinguishing equipment according to claim 1 or 2 , wherein the medicine blocking valve is positioned so that a space is formed between the medicine prevention valve and the medicine regulating valve section. A communication port that communicates with the drug inflow port, a cylinder portion that communicates with the mixing unit, and has an opening through which the drug adjustment valve portion is inserted,
The medicine blocking valve is seated with its seating portion in close contact with a valve seat portion provided around the cylinder portion, thereby closing the opening of the cylinder portion. Item 4. A mixer for foam fire extinguishing equipment according to item 2 or 3 .

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