JP3852060B2 - Bubble fire extinguishing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a foam fire extinguishing equipment provided in a parking lot, an automobile repair shop, etc. is there.
[0002]
[Prior art]
The foam fire extinguisher automatically mixes 3% or 6% foam extinguishing chemical, ie, foam stock solution, into the fire-extinguishing water in a pump or the like, and passes the mixed solution through a foam generating mechanism to form a foam with a volume more than 5 times the liquid mixture. The object to be extinguished is surrounded and suffocated and cooled and extinguished.
[0003]
Conventional foam fire extinguishing equipment is called single pipe type. In this method, a mixer is provided in one fire-extinguishing water pipe, a pump for pumping fire-extinguishing water is provided upstream, a simultaneous opening valve is provided downstream, and a foam head is provided on the secondary side of the simultaneous opening valve. A mixed liquid pipe is provided, and a heat sensitive pipe portion is communicated with the valve closing chamber of the simultaneous opening valve.
The heat sensitive tube is filled with a mixed solution of fire-extinguishing water and foam stock solution, and a sensing head for detecting a fire, for example, a closed sprinkler head, is provided. In addition, a manual release valve is provided at the end of the heat sensitive tube for discharging the mixed solution in the event of a fire or a test.
[0004]
Foam extinguishing equipment is legally required to perform functional tests regularly.
However, if the simultaneous opening valve is opened during the test and the mixed solution is discharged from the foam head, the cost, post-cleaning, and disposal of the discharged foam are expensive. Therefore, the test is actually performed as follows.
A gate valve is provided on the secondary side of the simultaneous release valve, and a test pipe is provided between the two. After closing the gate valve, the manual opening valve is opened to discharge the mixed liquid, and the pressure in the valve closing chamber is reduced. Then, the simultaneous release valve is opened and the mixed solution flows directly into the test pipe. Therefore, since the liquid mixture is not supplied to the foam head, the foam is not released from the foam head. Therefore, only the simultaneous opening valve opening test has been performed.
[0005]
[Problems to be solved by the invention]
The conventional example has the following problems.
(1) The foam head may be clogged with the exhaust gas of the car and the discharge characteristics may be deteriorated, but it cannot be checked unless the liquid mixture is supplied to the foam head.
[0006]
(2) When the discharge section is expanded from the main pipe, the mixed liquid is contained between the mixer and the simultaneous open valve. Therefore, the construction work is performed after the mixed liquid is discharged. As a result, construction costs increase and become uneconomical.
[0007]
(3) The simultaneous opening valve after the test is used as it is, even though it is dirty with the mixed solution. However, if the test is repeated many times, the open / close performance of the simultaneous open valve is deteriorated due to adhesion of a fire extinguishing agent.
[0008]
(4) Since the heat-sensitive tube is filled with a mixed solution containing fire-extinguishing water, the heat-sensitive tube may freeze in a cold region. Therefore, in order to prevent this, it is necessary to cover the tube with a heat insulating material or to mix an antifreeze liquid.
[0009]
In view of the above circumstances, an object of the present invention is to enable easy and economical testing of a foam fire extinguishing facility.
Another object is to simply prevent the heat sensitive tube from freezing.
[0010]
[Means for Solving the Problems]
The present invention relates to an extinguishing water pipe with a gate valve and a foam raw liquid pipe with a test valve provided therein; a mixer disposed in the fire water pipe and connected to the foam raw liquid pipe via a check valve A simultaneous opening valve comprising a valve closing chamber containing a water stop valve, a primary side connected to an outlet side of the mixer , and a secondary side connected to a mixed liquid pipe with a foam head , the valve closing chamber Connected to a heat sensitive tube with a sensing head , and the heat sensitive tube is connected to the foam stock solution tube via a connecting tube ; and a foam fire extinguishing equipment comprising: is there.
[0011]
The present invention comprises a fire-extinguishing water pipe with a partition valve and a foam raw liquid pipe with a test valve provided; a closed chamber containing a water stop valve, a primary side connected to the fire-extinguishing water pipe, and a secondary side a foam head A simultaneous open valve with a mixer connected to a mixed liquid pipe, wherein the valve closing chamber is connected to a thermal pipe with a sensing head , and the thermal pipe is connected to the foam raw liquid pipe via a connecting pipe And a foam-extinguishing device with a mixer , wherein the foam stock solution mixing hole is connected to the foam stock solution pipe.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
A fire-fighting water tube with a gate valve and a foam stock solution tube with a test valve will be installed side by side. The fire-extinguishing water pipe is provided with a mixer, and a simultaneous open valve is provided downstream thereof. A mixed liquid pipe having a foam head is connected to the secondary side of the simultaneous release valve.
[0013]
The foam stock solution pipe communicates with the mixer via a check valve, and this foam stock solution pipe communicates with the valve closing chamber of the simultaneous opening valve. A sensing head such as a closed-type sprinkler head is disposed in a heat sensitive tube communicating with the valve-closing chamber, that is, a foam raw liquid tube on the sensing head side, and a manual opening valve is provided at an end thereof.
[0014]
As the foam stock solution supplied to the foam stock solution tube, for example, a synthetic surfactant foam fire-extinguishing agent, a water film-forming foam fire-extinguishing agent, or a protein foam fire-extinguishing agent is used.
[0015]
As the mixer, for example, an inductor using a suction force or an inductor using a pumping force is used.
[0016]
As a foam head, for example, a foam water sprinkler head having an air bubble radiation function in addition to the function of an open type sprinkler head, or a foam head in which foam diffused by a deflector is further uniformly dispersed by a metal mesh is used. It is done.
[0017]
As the simultaneous opening valve, for example, a decompression opening simultaneous opening valve that opens by depressurization of the closed chamber is used, but a simultaneous opening valve having a mixing function, that is, a simultaneous opening valve with a mixer may be used.
[0018]
When the test valve is opened and the foam stock solution is pressure-fed to the foam stock solution tube, the foam stock solution is filled in the closed tube of the heat sensitive tube and the simultaneous open valve, and the simultaneous open valve maintains the closed state.
[0019]
During the test, the test valve is closed to shut off the supply of the foam stock solution to the foam stock solution tube, and the manual release valve is opened to discharge the foam stock solution in the heat sensitive tube. If it does so, since the pressure of a valve closing chamber will fall, a simultaneous open valve will open, and the water for fire extinguishing will flow in a liquid mixture pipe, and will be discharged from a foam head. At this time, the simultaneous opening valve and the foam head are cleaned by the fire-extinguishing water.
[0020]
[Example 1]
A first embodiment of the present invention will be described with reference to FIGS.
The large parking lot has a plurality of floors, and foam fire extinguishing facilities are provided in the fire extinguishing sections A ₁ , A ₂ and A ₃ .
[0021]
The foam fire-extinguishing equipment includes a fire-fighting water pipe ₁ with a partition valve SV _1, a foam raw liquid pipe 10 with a test valve SV ₂ , a simultaneous open valve 20 with a mixer provided in the fire-fighting water pipe 1, and the opening A bubble head 30 provided on the secondary side of the valve 20 and a sensing head 50 provided on the heat sensitive tube 40 communicating with the open valve 20 are provided.
[0022]
The fire-extinguishing water pipe 1 is connected to a water storage tank 5 through a gate valve 2, a check valve 3, pumps P ₁ and P ₂ , and a foot valve 4. This pump is composed of _two pumps P ₁ and P ₂ , and each pump P ₁ and P ₂ has a capacity that can completely cover one fire extinguishing section, for example, A ₁ . Therefore, when the pumps P ₁ and P ₂ are operated at the same time, two adjacent fire extinguishing sections, for example, A ₁ and A ₂ can be extinguished simultaneously.
[0023]
A pressure tank 6 and an antifreeze liquid tank 7 are connected to the fire-extinguishing water pipe 1.
The fire water pipe 1 is provided with a Y-type strainer 8a, an antifreeze liquid mixer 8b, and an alarm valve 9.
[0024]
The foam stock solution pipe 10 is connected to a foam stock solution tank 11. The foam stock solution pipe 10 is connected to a simultaneous open valve 20 with a mixer through a test valve (gate valve) SV ₂ , a check valve CV ₂ , and an orifice RO.
[0025]
The heat sensitive tube 40 communicates with the foam stock solution tube 10 via a connecting tube 10a, one end of which is connected to the valve closing chamber 26 of the simultaneous opening valve 20, and the other hand is provided with a manual opening valve 41.
The connecting tube 10 a is formed to be thinner than the foam stock solution tube 10 and the heat sensitive tube 40. For this reason, the foam stock solution G is squeezed by this connecting pipe and is difficult to flow into the heat-sensitive bottle 40. Instead of making the connecting pipe 10a thin as described above, an orifice may be formed in the connecting pipe.
[0026]
The mixed liquid pipe 31 is connected to the secondary side 22 of the simultaneous release valve 20, and a plurality of foam heads 30 are disposed in the pipe 31.
[0027]
The simultaneous open valve 20 with a mixer includes a primary side inlet 23 connected to the fire-extinguishing water pipe 1, a foam stock solution mixing hole 24 connected to the foam stock solution pipe 10, and a closed chamber 26 containing a water stop valve 25. It is equipped with.
[0028]
The primary side inlet 23 is comprised from the cylindrical part 23a and the reverse truncated cone part 23b, and the valve seat which is not shown in figure is formed in the end surface of this truncated cone part 23b.
[0029]
The foam stock solution mixing hole 24 includes a cylindrical inlet 24a formed horizontally and a truncated cone outlet 24b formed along the truncated cone portion 23b. A valve seat (not shown) is formed at the outlet 24b.
[0030]
The valve closing chamber 26 is provided with a secondary side outlet 22. The water stop valve 25 in the valve closing chamber 26 is formed in a bottomed cylindrical shape and is urged by a spring S in the valve closing direction.
The shape, size, and the like of the valve closing chamber 26 and the water supply valve 25 are appropriately selected as necessary.
[0031]
Next, an embodiment of the present embodiment will be described. First, fire monitoring will be described. During fire monitoring, open the test valve SV ₂ of AwaHara liquid pipe 10, opening the gate valve SV ₁ extinguishing water pipe 1, simultaneously opening valve 20 is closed, AwaHara liquid pipe 10, the heat sensitive tube 40 and simultaneously opening valves The 20 valve closing chambers 26 are filled with a foam stock solution G.
[0032]
When the sensing head 50 of the heat sensitive tube 40 is opened by a fire, the foam stock solution G in the tube 40 is discharged. Then, the pressure in the valve closing chamber 26 decreases, and the water stop valve 25 is displaced and separated from the valve seat as shown in FIG. 3, so that the simultaneous release valve 20 is opened, and the primary side inlet 23 and the secondary side are opened. The outlet 22 communicates.
[0033]
Fire-extinguishing water W pumped from the fire-extinguishing water pipe 1 enters the primary side inlet 23 and collides with the water stop valve 25, changes its flow direction, and travels toward the secondary side outlet 22. At this time, the foam stock solution G is introduced into the simultaneous opening valve 20 through the foam stock solution mixing hole 24, and the foam stock solution G is mixed into the fire-extinguishing water W, so that the fire-extinguishing water becomes the mixed solution WG. .
The mixed liquid WG is discharged from the foam head 30 through the secondary outlet 22 and the mixed liquid pipe 31 while forming a foam.
[0034]
At this time, the foam stock solution G enters the thermal tube 40 through the connecting pipe 10a and is released from the sensing head 50. Since the connecting pipe 10a is configured as described above, the foam stock solution G is used as the connecting pipe 10a. 10a makes it difficult to flow. Therefore, since the foam stock solution G discharged from the sensing head 50 is extremely small, wasteful use of the foam stock solution G can be prevented.
[0035]
When performing a functional test of a foam fire extinguisher, perform the following procedure.
(1) Close the test valve SV ₂ of the foam stock solution tube 10. In this case, gate valve SV ₁ extinguishing water pipe 1 is opened, simultaneously opening valve 20 is closed, Awagen'eki G is filled in the closed chamber 26 of the heat pipe 40 and simultaneously opening valve 20.
[0036]
(2) The manual opening valve 41 of the heat sensitive tube 40 is opened, and the foam stock solution G in the tube heat tube 40 is discharged. If it does so, the pressure in the valve closing chamber 26 will fall, and the water stop valve 25 will displace and will separate from a valve seat, Therefore The simultaneous release valve 20 is open | released and the primary side inlet 23 and the secondary side outlet 22 communicate. .
[0037]
(3) The fire-extinguishing water W pumped from the fire-extinguishing water pipe 1 passes through the primary side inlet 23, the secondary side outlet 22, and the mixed liquid pipe 31 and is discharged from the foam head 30. At this time, the opening valve 20 and the foam head 30 are cleaned by the fire-extinguishing water W and cleaned.
[0038]
After the test is completed as described above, the monitoring state is set by the following procedure.
(1) Close the manual release valve 41 of the foam stock solution pipe 10 and close the gate valve SV ₁ of the fire-extinguishing water pipe 1. At this time, the sensing head 50 is also closed.
[0039]
(2) Open the test valve SV ₂ of the foam stock solution tube 10. When the foam stock solution G is filled into the closed chamber 26 of the foam stock solution tube 10, the heat sensitive tube 40, and the simultaneous opening valve 20, the water stop valve 25 is pressed by the spring force of the spring S and the fluid pressure in the valve closing chamber 26. Sit down.
When the gate valve SV ₁ is opened and water is supplied to the primary side inlet 23, the water stop valve 25 is closed as a whole due to the area ratio of the water receiving pressure surface on the primary side, the secondary side and the water receiving pressure surface of the water stop valve 25. Since the force in the valve direction works, the water stop valve is seated and is closed.
[0040]
[Example 2]
A second embodiment of the present invention will be described with reference to FIGS.
The main difference between this embodiment and the first embodiment is that the mixer 55 and the simultaneous opening valve 60 are separately arranged instead of using the simultaneous opening valve with a mixer.
[0041]
In this embodiment, the mixer 55 provided in the fire-extinguishing water 1 is connected to the foam stock solution pipe 10 via a check valve GV, and a simultaneous release valve 60 is provided on the outlet 55 b side of the mixer 55. The check valve GV prevents the fire-fighting water from flowing back into the thermal tube 40 and prevents the fire-fighting water from being mixed into the foam stock solution.
[0042]
The mixer 55 and the simultaneous opening valve 60 used here are not particularly limited. For example, as the mixer 55, a pressure / proportional method (differential pressure mixing), a pressure / side proportioner method (press-fit mixing). ) Etc.
[0043]
Further, as the simultaneous opening valve 20A, for example, one having a structure as shown in FIG. 5 is used, but this valve 20A has a structure in which the foam stock solution mixing hole 24 is removed from the simultaneous opening valve with mixer 20 of the first embodiment. It has become.
[0044]
【The invention's effect】
Since the present invention is configured as described above, the following remarkable effects can be obtained.
(1) Since the test valve provided in the foam stock solution pipe is closed and tested, only fire-fighting water is discharged from the foam head through the simultaneous open valve.
Therefore, wasteful use of the foam stock solution can be prevented, and the simultaneous opening valve and the foam head are cleaned by the fire-extinguishing water.
Also, unlike the conventional example, the fire-fighting water is discharged from the foam head during the test, so that clogging and the like can be easily detected.
[0045]
(2) Since the fire-extinguishing water is not mixed into the sensing head side of the foam stock solution tube, it is possible to maintain a state where only the foam stock solution is always filled. This foam stock solution does not freeze, for example, until it reaches −2 ° C. to −20 ° C., and therefore it is extremely difficult to freeze compared to fire-fighting water.
Therefore, even if this foam fire extinguishing equipment is used in a cold region of −2 ° C. to −20 ° C., it does not freeze. Therefore, unlike the conventional example, no antifreeze injection or heat insulation work with a heat insulating material is required.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a simultaneous open valve with a mixer showing a closed state.
FIG. 3 is a view showing a state different from FIG. 2, and is a longitudinal sectional view showing a valve open state.
FIG. 4 is a diagram showing a second embodiment of the present invention.
FIG. 5 is a longitudinal sectional view showing a simultaneous opening valve.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fire extinguishing water pipe 10 Foam original liquid pipe 20 Simultaneous opening valve 25 with a mixer Water stop valve 26 Valve closing chamber 30 Foam head 31 Liquid mixture pipe 40 Thermal pipe 41 Manual release valve 50 Sensing head

Claims (2)

A fire-fighting water pipe with a gate valve and a foam raw liquid pipe with a test valve;
A mixer disposed in the fire-extinguishing water pipe and connected to the foam stock liquid pipe via a check valve;
A simultaneous opening valve having a valve closing chamber containing a stop valve, a primary side connected to the outlet side of the mixer , and a secondary side connected to a mixed liquid pipe with a foam head , which is detected by the valve closing chamber And a simultaneous opening valve connected to the foam stock solution pipe via a connecting pipe, connected to a heat sensitive pipe with a head for use. A fire-fighting water pipe with a gate valve and a foam raw liquid pipe with a test valve;
A simultaneous opening valve with a mixer, comprising a valve closing chamber containing a water stop valve, a primary side connected to the fire-extinguishing water pipe, and a secondary side connected to a mixed liquid pipe with a foam head, wherein the valve closing chamber is A simultaneous open valve with a mixer connected to a heat sensitive tube with a sensing head , the heat sensitive tube connected to the foam stock solution pipe via a connecting tube, and a foam stock solution mixing hole connected to the foam stock solution tube; A foam fire extinguishing equipment, characterized by comprising:

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