JP3003174U - Auxiliary pressure device for fire extinguisher - Google Patents

Abstract

(57) [Summary] [Purpose] When the water or air inside the fire extinguisher pipe and pressure tank of the fire extinguisher decreases due to a cause other than the occurrence of a fire, and the pressure inside the fire extinguisher pipe drops, it is reasonable not to operate the fire pump. (EN) Provided is an auxiliary pressurizing device capable of retaining the water pressure in a fire extinguisher. [Structure] An auxiliary pump 8 for supplying water from a water supply tank 7 is provided to a pressure tank 3 for holding the fire extinguisher pipe 2 at an appropriate pressure, and a water pipe 9 connecting the auxiliary pump and the pressure tank rises. An air supply device 10 is provided which is provided with a portion 9a and in which air is introduced from the outside at a constant height position of the rising portion. At this time, the auxiliary pump automatically starts when the pressure in the pressure tank drops to a certain level and supplies the water in the water supply tank and the air in the air supply device to the pressure tank, while the pressure in the pressure tank Operates to automatically stop when the pressure rises to an appropriate level.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to an auxiliary pressurizing device for a fire extinguisher that always maintains an appropriate water pressure.

[0002]

[Prior art]

 Fire extinguishing equipment is provided for buildings in case of a fire, and there are such equipment as shown in Fig. 7.

That is, 1 is a fire pump for sending water from a fire extinguisher tank to a fire extinguisher pipe 2 connected to a sprinkler s, 3 is a pressure tank for keeping the water pressure in the fire extinguisher pipe 2 at an appropriate value, and 4 is a fire extinguisher. A control device for operating the pump 1 and the like, and 5 is a check valve 5 provided at a water outlet of the fire pump 1.

At this time, the pressure tank 3 has an air chamber inside, and the water in the digestive tract 2 compresses or expands the air in the air chamber to freely flow in and out. Moreover, the fire pump 1 is designed to be automatically started by a pressure switch 6 which operates by detecting the pressure in the pressure tank 3.

When a fire occurs in a building, the stopcock of the sprinkler s is melted and opened by the heat, and the water in the fire extinguishing pipe 2 is ejected from the sprinkler s. When the water pressure in the fire extinguisher pipe 2 drops due to this jet, the pressure switch 6 detects this pressure drop, and the fire pump 1 is automatically started by this, and the water in the fire extinguisher tank is continuously fed into the fire extinguisher pipe 2. To supply.

Once the fire pump 1 is started in this manner, the fire pump 1 will continue to operate forever, unless a person manually operates the stop switch of the control device 4 due to legal structural requirements. .

[0007]

[Problems to be solved by the device]

 In the fire extinguishing equipment configured as described above, the water pressure of the fire extinguishing pipe 2 is always properly maintained even when the fire extinguishing pump 1 is stopped. Since the air in the air will be dissolved in water, the pressure will drop below a certain level, so the pressure switch 6 will detect this pressure drop and the fire pump 1 will automatically The fire pump thus started may continue to operate indefinitely unless the stop switch of the control unit 4 is operated, as described above, and energy is wasted. In addition to burning the pump, it can lead to confusing false alarms.

An object of the present invention is to provide an auxiliary pressurizing device for a fire extinguisher, which is capable of solving such a problem.

[0009]

[Means and Actions for Solving the Problems]

 In order to achieve the above object, the present invention employs the following means. That is, in the first invention, an auxiliary pump for supplying water from the water supply tank is provided to the pressure tank for holding the fire extinguisher pipe at an appropriate pressure, and a water pipe connecting the auxiliary pump and the pressure tank. A rising part is provided at the rising part, and an air replenisher that allows air to flow in from the outside is provided at a constant height position of this rising part. When it drops, it starts automatically and supplies the water in the water tank and the air in the air replenisher to the pressure tank, while it automatically stops when the pressure in the pressure tank rises to an appropriate pressure. It is configured to operate like.

When the pressure in the pressure tank decreases, the auxiliary pump operates before the fire pump operates to supply the water in the water supply tank and the air in the air supply device into the pressure tank. As a result, the water pressure in the fire extinguisher is restored, the fire pump does not operate automatically, and the supply of air to the pressure tank is due to the frequent operation of the auxiliary pump that occurs in the absence of air. Will be prevented.

In this invention, the air replenisher is provided with an air chamber in a hermetically sealed state, an air passage is provided in the relatively upper portion thereof, and air is allowed to flow into the air chamber in the middle of the air passage. The check valve means is provided.

According to this, the air flows into the air chamber while the auxiliary pump is stopped, and the air is supplied to the pressure tank together with water during the operation.

In the second invention, an auxiliary pump is provided for supplying the water in the auxiliary tank for fire fighting provided above the fire extinguisher pipe system into the fire extinguisher pipe where a proper water pressure is always maintained, and the auxiliary pump A diaphragm type pressure tank that keeps the water pressure inside it at an appropriate pressure is connected to the water pipe connected to the outlet side of the pump, and the auxiliary pump automatically operates when the pressure in the pressure tank drops to a certain level. It is configured to start automatically and supply water from the auxiliary tank for fire fighting into the fire extinguisher pipe, while automatically stopping when the water pressure in the fire extinguisher pipe reaches an appropriate pressure.

The diaphragm type pressure tank has a structure in which a closed space is provided, the upper and lower sides of this internal space are partitioned by a diaphragm, and the upper space is an air chamber and the lower space is a water chamber. And eggplant

In this invention, the auxiliary pump supplies water from the auxiliary tank for fire fighting into the fire extinguisher pipe to appropriately maintain the water pressure in the fire extinguisher pipe. Therefore, as in the first invention, the fire extinguishing pump operates due to water leakage or the like. Will be prevented. In addition, the diaphragm pressure tank prevents the air from being dissolved in water by the diaphragm separating the air and water, and it is possible to secure the appropriate amount of air necessary. Frequent repeated operation of the auxiliary pump is prevented even if it decreases due to melting or the like. In addition, the auxiliary tank for fire fighting is located above the fire extinguishing pipe system, so the lift required by the auxiliary pump should be small.

In the third invention, an auxiliary pump for supplying water from the water supply tank is provided in the fire extinguisher pipe which is maintained at an appropriate pressure, and a water supply pipe connecting the auxiliary pump and the fire extinguisher pipe is connected with the auxiliary pump. A diaphragm type pressure tank that keeps the internal water pressure at an appropriate level is connected, and when the pressure inside the fire extinguisher pipe drops to a certain pressure, the auxiliary pump automatically starts and extinguishes the water in the water tank. While supplying water to the pipe, it is configured to automatically stop when the water pressure in the fire extinguishing pipe rises to an appropriate pressure. At this time, the diaphragm type pressure tank is the same as that described above.

Also according to this invention, the operation of the auxiliary pump prevents the operation of the fire pump, and the diaphragm type pressure tank prevents the auxiliary pump from repeatedly operating frequently.

In the fourth invention, an additional pressure tank for maintaining the inside of the fire extinguisher pipe at an appropriate water pressure is provided, and an auxiliary pump for supplying water in the water supply tank to the additional pressure tank is provided, and The water pipe connecting the auxiliary pump and the pressure tank is provided with a rising part, and an air replenisher that allows air to flow in from the outside is installed at a certain height position of this rising part. When the pressure in the tank drops to a certain level, it automatically starts and supplies the water in the water supply tank and the air in the air supply device to the pressure tank, while the pressure in the pressure tank rises to an appropriate pressure. It is configured so that it will automatically stop when the At this time, the air supply device is the same as that described above.

According to this, since the additional pressure tank is supplied with water and air by the auxiliary pump, it functions similarly to the pressure tank in the first invention.

[0020]

【Example】

 In the following description, the same parts as those of the conventional one will be designated by the same reference numerals.

FIG. 1 is a view showing a first embodiment of the present invention, and FIG. 2 is a sectional view showing an air replenisher according to the same embodiment. In these drawings, 7 is an opening filled with tap water or the like. 8 is an auxiliary pump that supplies water from the water supply tank 7 to the pressure tank 3 through the water supply pipe 9.

The water supply pipe 9 that connects the auxiliary pump 8 and the pressure tank 3 is provided with a rising portion 9a, and the rising portion 9a has a certain height position (from the water surface when the water tank 7 is filled with water). An air supply device 10 is provided at a higher position) to which air is introduced from the outside.

The air supply device 10 is provided with an air chamber 10a that is hermetically sealed, and an air passage 11 is provided at a relatively upper portion of the air chamber 10a, and the air chamber 10a is provided from the outside in the middle of the air passage 11. The check valve means 12 is provided to allow only the inflow of air to the inside. The check valve means 12 comprises a ball valve 12a and a valve seat 12b.

Reference numeral 14 denotes a pressure switch for detecting the pressure in the pressure tank 3, which operates the auxiliary pump 8 at a pressure higher than that of the other pressure switch 6 and stops the pump 8 by an appropriate increase in pressure. It is supposed to work like.

Reference numeral 15 is a stop valve, and 16 is a check valve.

The operation of the apparatus of this embodiment configured as described above will be described. When the pressure in the pressure tank 3 is reduced due to leakage of water or air in the fire extinguishing pipe 2, the pressure switch 14 causes this pressure reduction. The pressure is detected before the other pressure switch 6, and the auxiliary pump 8 is started.

The auxiliary pump 8 thus operated serves to supply the water in the water supply tank 7 into the pressure tank 3. At this time, the check valve means 12 of the air replenisher 10 operates the air chamber 10 a by the operation of the auxiliary pump 8. The inside of the air chamber 10a is closed by the increase of the pressure inside, and the air inside the water supply pipe 9 is supplied into the pressure tank 3 together with the water inside the water supply pipe 9. When the pressure in the pressure tank 3 rises to an appropriate value and the pressure switch 14 detects this, the auxiliary pump 8 is stopped.

As a result, the pressure in the water supply pipe 9 on the outlet side of the auxiliary pump 8 decreases, so that the check valve 15 is closed and the pressure in the pressure tank 3 is maintained at the pressure value at that time. Become.

On the other hand, the water existing inside the rising portion 9 a of the water supply pipe 9 and the inside of the air chamber 10 a of the air replenisher 10 tries to flow back into the water supply tank 7 via the auxiliary pump 8 by the action of gravity. Therefore, the check valve means 12 of the air replenisher 10 is opened, the air on the atmosphere side flows into the air chamber 10a through the air passage 11, and the water surface in the rising portion 9a becomes the same as the water surface in the water supply tank 3. It becomes the same height.

After that, the same operation as described above is repeated every time the pressure in the pressure tank 3 drops, so that the water pressure in the fire extinguishing pipe 2 is maintained above a certain level, and the conventional fire extinguishing caused by water leakage or the like occurs. The operation of the pump 1 is prevented. At this time, the replenishment of air into the pressure tank 3 by the air replenishment device 10 contributes to prevent frequent operation of the auxiliary pump 8.

When a fire actually occurs, the pressure inside the fire extinguisher pipe 2 drops sharply, and the water supply by the auxiliary pump 8 cannot compensate for this decrease. Since the pressure drops below a certain value, the pressure switch 6 detects this pressure drop and the fire pump 1 is activated. During this operation, the check valve 15 is closed, and the air and water in the pressure tank 3 do not flow out to the water pipe 9 side.

Next, FIG. 3 is a view showing a second embodiment of the present invention, and FIG. 4 is a sectional view showing a diaphragm type pressure tank according to the same embodiment. In these drawings, 17 is a fire extinguisher pipe 2 system. An open type auxiliary tank for fire fighting, which is provided above the tank, 8a is an auxiliary pump for supplying the water in the auxiliary tank for fire fighting 17 into the fire extinguishing pipe 2 through the water supply pipe 9.

Here, the auxiliary tank 17 is designed to supply this water into the fire extinguishing pipe 2 through the check valve 18 by the action of gravity, and it has existed conventionally.

However, a check valve 19 is provided in the water supply pipe 9 that connects the auxiliary pump 8 a and the fire extinguisher pipe 2, and the check valve 19 is provided in the water supply pipe 9 that connects the fire extinguisher pipe 2. Is connected to a diaphragm type pressure tank 20 for keeping the water pressure at an appropriate level, and detects the pressure drop inside the fire extinguisher pipe 2 before it is detected by the conventional pressure switch 6 (see FIG. 7). A pressure switch 14a is connected to start the auxiliary pump 8a and detect an appropriate increase in pressure to stop the pump 8a.

In this case, the diaphragm type pressure tank 20 has a closed space, and the upper and lower sides of this space are partitioned by the diaphragm 21 to form an air chamber 22 and the lower space is a water chamber 23. The water chamber 23 and the fire extinguisher pipe 2 are communicated with each other.

The operation of the apparatus of this embodiment configured as described above will be described. The amount of water or air in the fire extinguishing pipe 2 leaks or the air in the pressure tank 3 dissolves in water, and the amount thereof decreases. Even at this time, when the decrease is within a certain range, the air in the air chamber 22 of the diaphragm type pressure tank 20 expands to compensate for it. Since the diaphragm 21 separates the air from the water, the decrease of the air due to the air in the air chamber 22 dissolving into the water is surely prevented.

On the other hand, when the decrease in water or air in the fire extinguishing pipe 2 exceeds a certain range and the pressure in the pressure tank 3 decreases, the pressure switch 14a indicates this decrease in pressure to the fire pump 1 (see FIG. 7). The pressure is detected prior to the pressure switch 6 associated with the auxiliary pump 8a.

The auxiliary pump 8 a thus operated raises the pressure of the water in the auxiliary tank 17 higher than the pressure in the fire extinguishing pipe 2, and supplies it to the inside thereof via the check valve 19. Since the auxiliary tank 17 is higher than the fire extinguisher pipe 2 system, the auxiliary pump 8a can supply water into the fire extinguisher pipe 2 with a small head. After that, when the pressure in the fire extinguishing pipe 2 rises to an appropriate value and the pressure switch 14a detects this, the auxiliary pump 8a is deactivated.

As a result, when the pressure in the water supply pipe 9 on the outlet side of the auxiliary pump 8a decreases, the check valve 19 is closed and the pressure in the fire extinguishing pipe 2 is maintained at an appropriate value.

After that, the same operation as described above is repeated each time the pressure in the fire extinguishing pipe 2 drops. Therefore, also in this case, the conventional operation of the fire extinguishing pump 1 due to water leakage or the like is prevented. At this time, the air in the air chamber 22 of the diaphragm type pressure tank 20 does not dissolve in water even if the air in the pressure tank 3 becomes insufficient, for example, even if the air in the pressure tank 3 dissolves in water. Prevent frequent operation of.

When a fire actually occurs, the fire extinguishing pump 1 is started as in the case of the first embodiment. Also, in an emergency situation where the fire extinguishing pump 1 does not operate due to a failure or the like, assistance is provided. The water in the tank 17 is supplied into the fire extinguishing pipe 2 through the check valve 18 by the action of gravity.

FIG. 5 is a diagram showing a third embodiment of the present invention. In the figure, 8b is an auxiliary pump for supplying the water in the water supply tank 7 into the fire extinguishing pipe 2 through the water supply pipe 9.

The water supply pipe 9 connecting the auxiliary pump 8b and the fire extinguishing pipe 2 is provided with a check valve 19a. The water supply pipe 9 connecting the check valve 19a and the fire extinguishing pipe 2 has the same structure as described above. In addition to the diaphragm type pressure tank 20, the pressure drop in the fire extinguishing pipe 2 is detected before the other pressure switch 6 is detected to start the auxiliary pump 8b and detect an appropriate pressure rise. A pressure switch 14b for stopping the pump 8b is connected. Reference numeral 24 is a stop valve.

The operation of the apparatus of this embodiment configured as described above is based on the case of the second embodiment, that is, the water or air in the fire extinguishing pipe 2 leaks or the air in the pressure tank 3 dissolves in the water. When the amount decreases due to eclipse, and the decrease is within a certain range, the air in the air chamber 22 of the diaphragm pressure tank 20 expands to compensate for it.

When the decrease in water or air in the fire extinguisher 2 exceeds a certain range and the pressure in the pressure tank 3 decreases, the auxiliary pump 8b is started and the pressure in the fire extinguisher 2 becomes an appropriate value. Retained.

Therefore, also in this embodiment, the conventional start of the fire pump 1 due to water leakage or the like is prevented, and the air in the air chamber 22 of the diaphragm pressure tank 20 exists without being dissolved in water. The frequent operation of the auxiliary pump 8b is prevented.

FIG. 6 is a diagram showing a fourth embodiment of the present invention. In the figure, 8c is an auxiliary pump which supplies water from the water supply tank 7 to the additional pressure tank 3a through the water supply pipe 9. Here, the additional pressure tank 3a is the same as the above-mentioned pressure tank 3.

The water supply pipe 9 that connects the auxiliary pump 8c and the additional pressure tank 3a is provided with a rising portion 9a, and a certain height position of this rising portion 9a (water is supplied into the water supply tank 7). An air replenisher 10 similar to the one described above is provided at a position higher than the water surface when it is filled, and a check valve 25 is provided in the water pipe 9 located between the rising portion 9a and the additional pressure tank 3a. It is provided.

Reference numeral 14 c is a pressure switch for detecting the pressure in the additional pressure tank 3 a. The auxiliary pump 8 c is operated at a pressure higher than that of the other pressure switch 6 and the pump 8 c is stopped by an appropriate increase in pressure. It is supposed to work like.

Reference numeral 9c is a water supply pipe which connects the additional pressure tank 3a and the fire extinguishing pipe 2, and 26 is a stop valve.

The operation of the apparatus according to the present embodiment configured as described above will be described. Even when these decrease due to leakage of water or air in the fire extinguishing pipe 2, etc., if the decrease is within a certain range, the additional pressure tank The air in 3a expands and compensates for this. However, when this decrease exceeds a certain range and the pressure in the additional pressure tank 3a decreases to a certain amount or more, the pressure switch 14c detects this pressure decrease before the other pressure switch 6 and assists. Start pump 8c.

The auxiliary pump 8c thus operated raises the pressure of the water in the water supply tank 7 higher than the pressure in the additional pressure tank 3a and supplies it to the pressure tank 3a. The same operation as described above is performed, and the air in the air chamber is supplied into the additional pressure tank 3a together with the water in the water supply pipe 9. When the pressure in the additional pressure tank 3a rises to an appropriate value and the pressure switch 14c detects this, the auxiliary pump 8c is deactivated.

As a result, the pressure in the water supply pipe 9 on the outlet side of the auxiliary pump 8c decreases and the check valve 25 is closed, so that the pressure in the additional pressure tank 3a is maintained at the pressure value at that time. Becomes

On the other hand, the water inside the rising portion 9a of the water supply pipe 9 and the air replenisher 10 flows back into the water supply tank 7 via the auxiliary pump 8c by the same action as that of the air replenisher 10 described above, and inside the rising portion 9a. The water surface of is the same as the water surface in the water supply tank 7.

After that, the same operation as described above is repeated each time the pressure in the additional pressure tank 3a decreases, and therefore, the conventional fire pump 1 start-up due to water leakage or the like is prevented. At this time, the supply of air to the additional pressure tank 3a by the air replenisher 10 contributes to prevent frequent operation of the auxiliary pump 1. Even in this case, in the case of an actual fire, the operation is similar to that of the first embodiment.

[0056]

[Effect of device]

 As described above, according to the present invention, water or air leaks from the fire extinguisher or the pressure tank, or the air in the pressure tank dissolves in water, and the pressure in the fire extinguisher decreases even though it is not a fire. In such a case, it is possible to maintain the inside of the fire extinguishing pipe at an appropriate water pressure without causing the conventional problems such as the fire pump operating wastefully, and also to maintain the air pressure in the air chamber of the diaphragm pressure tank. Due to the presence of air, or the presence of air supplied to the pressure tank or additional pressure tank, frequent and repeated actuation of the auxiliary pump is prevented and a small capacity of the auxiliary pump is generally sufficient.

Particularly, according to the second aspect, it becomes possible to replenish water into the fire extinguishing pipe by the auxiliary pump having a particularly small head.

According to the fifth aspect, the supply of air by the air supply device can be realized with a simple structure.

Further, according to the sixth aspect, since the air and water are separated by the diaphragm in the diaphragm type pressure tank, the air in the air chamber of the tank is not dissolved in the water, and even if the pressure is Even if the air in the tank dissolves in water and decreases, it is possible to reliably prevent the frequent repeated operation of the auxiliary pump.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an air replenisher according to the same example.

FIG. 3 is a view showing a second embodiment of the present invention.

FIG. 4 is a sectional view showing a diaphragm type pressure tank according to the same example.

FIG. 5 is a view showing a third embodiment of the present invention.

FIG. 6 is a view showing a fourth embodiment of the present invention.

FIG. 7 is a diagram of a conventional example.

[Explanation of symbols]

 2 Fire extinguishing pipe 3 Pressure tank 3a Additional pressure tank 7 Water supply tank 8, 8a, 8b and 8c Auxiliary pump 9 Water supply pipe 9a Rise 10 Air supply device 10a Air chamber 11 Air passage 12 Check valve means 17 Auxiliary tank 20 Diaphragm pressure Tank 22 air chamber 23 water chamber

Claims (6)

[Scope of utility model registration request] 1. A pressure tank for holding the fire extinguisher pipe at an appropriate pressure is provided with an auxiliary pump for supplying water from the water supply tank, and a rising portion is provided for a water pipe connecting the auxiliary pump and the pressure tank. , An air replenisher that allows air to flow in from the outside is installed at a certain height position of this rising part.The auxiliary pump automatically starts when the pressure in the pressure tank drops to a certain pressure. While supplying the water in the water supply tank and the air in the air replenisher to the pressure tank, it automatically stops when the pressure in the pressure tank rises to an appropriate pressure. Auxiliary pressurizing device for fire pipes. 2. An auxiliary pump for supplying water from an auxiliary tank for fire fighting provided above the fire extinguisher pipe system into the fire extinguisher pipe where a proper water pressure is always maintained, and is connected to the outlet side of the auxiliary pump. A diaphragm type pressure tank that keeps the water pressure inside it to an appropriate pressure is connected to the water supply pipe, and the auxiliary pump automatically starts when the pressure in the pressure tank drops to a certain pressure and fire prevention. A supplementary pressurizing device for a fire extinguisher, which is configured to automatically stop when the water pressure in the fire extinguisher rises to an appropriate pressure while supplying water from the auxiliary tank for the fire extinguisher. 3. An auxiliary pump for supplying water from a water supply tank is provided in the fire extinguisher pipe held at an appropriate pressure, and the water pressure inside the auxiliary pump is connected to the water pipe connecting the auxiliary pump and the fire extinguisher pipe. A diaphragm type pressure tank that was supposed to be maintained at an appropriate pressure is connected, and when this auxiliary pump automatically starts when the pressure in the fire extinguisher drops to a certain pressure, it supplies water from the water tank to the fire extinguisher. A supplementary pressurizing device for a fire extinguisher, characterized in that it operates so as to automatically stop when the water pressure in the fire extinguisher rises to an appropriate pressure. 4. An additional pressure tank for holding the inside of the fire extinguisher pipe at an appropriate water pressure is provided, and an auxiliary pump for supplying the water in the water supply tank to the additional pressure tank is provided.
In addition, the water supply pipe connecting the auxiliary pump and the pressure tank is provided with a rising portion, and an air replenisher that allows air to flow from the outside is provided at a certain height position of this rising portion. When the pressure in the pressure tank drops to a certain level, it automatically starts and supplies the water in the water supply tank and the air in the air supply device to the pressure tank, while the pressure in the pressure tank rises to an appropriate pressure. A supplementary pressurizing device for fire-extinguishing pipes, which is characterized in that it operates so as to automatically stop when it does. 5. The air replenisher is provided with an air chamber in a hermetically sealed state, and an air passage is provided at a relatively upper portion thereof,
The auxiliary pressurizing device for a fire extinguisher according to claim 1 or 4, wherein a check valve means for allowing the inflow of air into the air chamber is provided in the middle of the air passage. 6. A structure in which a diaphragm type pressure tank is provided with a closed space, and the upper and lower sides of this internal space are partitioned by a diaphragm to form an air chamber and a lower space to form a water chamber. The auxiliary pressurizing device for a fire-extinguishing pipe according to claim 2 or 3, wherein