JP2007295999A - Water feeding/sucking unit for examination or inspection of dry-type fire-extinguishing water pipe and method of using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water feeding/sucking unit capable of repeatedly using water fed to a water pipe for examination or inspection of the pressure resistance of the dry-type fire-extinguishing water pipe by securely collecting water from a pipe at a lower position, and capable of reducing the labor and cost necessary for the examination or inspection of the pressure resistance and the examination or inspection of the air-tightness of the water pipe by implementing the examination or inspection by the same device. <P>SOLUTION: The distal end of a water feeding conduit connecting an outlet of a water tank and a water pump is integrated with the distal end of a water suction conduit connecting a water intake of the water tank and a vacuum pump, and the distal end of the integrated piping can be connected to an outlet of the dry-type fire extinguishing water pipe. Feeding of water to the dry-type fire extinguishing water pipe and collection of water to the water tank can be repeated by the switching operation of valves in the water feeding/sucking unit for examination or inspection of the pressure resistance of the dry-type fire extinguishing water pipe. The above-mentioned water feeding/sucking unit and the method of using the unit are provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a water supply / absorption unit used for testing or checking the pressure resistance and airtightness of a water pipe for dry fire extinguishing, and a method for using the same. In the present invention, the “dry fire-extinguishing water pipe” refers to various water pipes or water-feeding equipment used for fire extinguishing, such as dry connected water pipes, dry sprinklers, and sprinklers, and is usually in an empty state. It's about things. Hereinafter, the present invention will be described mainly based on a case of “inspection of dry connected water pipe” which is a representative example of “test or inspection of water pipe for dry fire extinguishing”.

Dry-type water pipes (hereinafter sometimes referred to simply as “connected water pipes”) are high-rise pipes corresponding to several fire hoses so that water can be injected immediately after the fire engine arrives at the site in the event of an emergency. It is laid inside a building such as a building. For this reason, it is necessary to prepare for emergencies by carrying out maintenance and inspection on a daily basis. According to the Fire Service Act, which was partially amended in 2003, it is mandatory to conduct regular pressure check and report on the result of the installation of connected water pipes of buildings over 7 stories after 10 years. Yes. In addition, the structure of a dry-type connection water pipe and the inspection method are explained in detail in Patent Document 1.
JP, 2005-205050, A In general, pressure resistance of a dry-type water connection pipe is checked by supplying pressurized water to the water supply pipe and applying hydrostatic pressure for a predetermined time (for example, 3 minutes) to determine whether there is water leakage or valve deformation. The method of checking the inspection items is taken. Normally, the connected water pipes installed in high-rise buildings are installed in a dedicated vehicle by a specialized contractor equipped with a water supply unit consisting of a large-capacity water tank filled with water, a water supply pump, required piping, water supply hoses, etc. Are regularly inspected and inspected. In other words, the water inlet of the water hose connected to the water tank of the water supply unit mounted on the dedicated vehicle via the water pump is connected to the water inlet of the connected water pipe, and all the valves other than the valve of the water inlet are closed. The pump is activated, water is fed into the connected water pipe, and a predetermined inspection is performed. After the inspection, the water in the connected water pipe is discharged from the discharge port by opening the drain valve and discarded.

  As described above, in the conventional method for checking the pressure resistance of the dry connected water pipe, since the water filled in the connected water pipe is discarded after the inspection is completed, the water tank of the water supply unit (normally Even if it is almost the same size as a fire truck and has a capacity of 1500L, it will run out of water in the tank after several inspections, and water must be procured and replenished on site. In other words, the conventional method for testing or inspecting a dry connected water pipe and the water supply unit used in the method are a method and an apparatus considering only "water supply to a dry connected water pipe". No consideration is given to the recovery and reuse of the water sent to the water.

  In view of such a situation, the present inventor is able to collect the used water in a water tank and repeatedly use it in a pressure test or inspection of a dry fire-fighting water pipe, typically a dry-connected water pipe. And a method for using the same have been filed (Patent Document 1).

  The water-feeding / absorbing unit for testing or inspection of a dry-type fire-fighting water pipe disclosed in Patent Document 1 and its method of use (hereinafter sometimes referred to as “the previously developed water-absorbing unit and its method of use”) are water. Since sending and collecting can be performed by a single pump by switching the valve, most of the water used for pressure-resistant testing and inspection of the water pipe for dry fire extinguishing is collected and reused in the water tank of the water absorption unit. As a result, water can be saved significantly, and inspection work can be continued all day without procuring or replenishing water, resulting in a significant improvement in work efficiency.

  However, the previously developed water absorption and absorption unit and its method of use perform water supply and recovery with a single water supply pump, so the water in the lower position of the dry connected water supply pipe (eg underground underground pipe) is completely recovered. It may not be possible and water may accumulate in the piping. Many of the recent dry connected water pipes in buildings do not have a drain, and if any water remains in the pipe, it tends to cause pipe corrosion. Also, the previously developed water-absorbing unit and its method of use are structured and operated because the pipe of the water-absorbing / water-absorbing unit is composed of three main lines, the first bypass pipe line and the second bypass pipe line. It is a little complicated. Therefore, the present inventor can further improve the previously developed water supply / absorption unit and its method of use to reliably collect water, simplify the structure, reduce the manufacturing cost, and further reduce the work load. We have developed a water-absorbing and water-absorbing unit that can be used.

  Also, if water is suddenly fed into the dry connected water pipe, it will cause a serious water damage accident if the valve is damaged or forgotten to close, or the pipes are loosened. Before checking the performance, air is sent into the dry connected water pipe to test and check the airtightness of the piping and valves. This airtightness check is sometimes referred to as a “pneumatic pre-test” or “air test”, but in the conventional general method, airtightness is checked separately from the water supply unit piping every time airtightness is checked. Attach the air supply pipe connecting the compressor and the generator to the water supply port of the dry connected fire fighting water supply pipe, start the air compressor, send pressurized air into the connected water supply pipe, and check the airtightness of the piping and valves When the inspection is completed, the water discharge valve is opened to discharge the air, the air supply pipe of the air compressor is removed, and then the water is supplied to check the pressure resistance. As described above, a method that takes a lot of time and labor is taken for checking the airtightness of the dry-type water connection pipe that is currently generally performed.

  Because of this situation, the present inventor has improved the pressure resistance test or inspection method for dry fire-fighting water pipes represented by dry-type water pipes, and at the same time, tested and inspected hermeticity. The present invention was completed as a result of various studies.

  In view of the above situation, the present invention improves the pressure resistance test or inspection method for dry fire-fighting water pipes that has been conventionally performed, and can reduce the labor and cost required for the test or inspection, and its water absorption / absorption unit Providing a method of use, specifically, the water in the dry fire extinguishing water pipe can be reliably recovered from the piping part at a low position, and can be repeatedly used for the pressure resistance test or inspection. It is a first object to provide a water feeding / absorbing unit that can further reduce the labor and cost required for the property test or inspection, and a method for using the same.

  In addition, the present invention performs the pressure resistance test or inspection of the dry fire-extinguishing water pipe by performing the pressure resistance test or inspection of the dry fire-extinguishing water pipe and the airtightness test or inspection using the same equipment. It is a second object to provide a water feeding / absorbing unit and a method of using the same that can reduce the cost and labor and cost of the airtightness test or inspection.

  That is, the present invention relates to the test or inspection of dry fire-extinguishing water pipes by improving both the pressure resistance test or inspection method and the airtightness test or inspection method. It is an object of the present invention to provide a water feeding / absorbing unit that can greatly reduce labor and cost required and a method for using the same.

  Among the present inventions for solving the above-mentioned problems, the invention described in claims 1 and 2 is that the water discharge port of the water tank and the water supply pump are connected to the tip of the water supply pipe and the water recovery port of the water tank. And the tip of the water absorption pipe line formed by connecting the vacuum pump and the combined pipe can be connected to the water supply port of the water pipe for dry fire extinguishing or the water supply / hose fitting fitted thereto, All pipes are constructed of pressure-resistant pipes, and the water in the tank is sent to the dry fire-fighting water pipe by the water pump, and the supplied water is recovered to the water tank by the vacuum pump by switching the valve. This is a water-feeding / absorbing unit for testing or checking the pressure resistance of a dry-type fire-fighting water pipe that can repeatedly repeat the operation of sending the water collected in the water tank to the dry-type fire-fighting water pipe by means of a switching operation.

  In the invention described in claim 2, an air compressor is attached to the water supply pipe, and the air compressor is started and air is fed from the water supply pipe to the dry fire-extinguishing water-feed pipe. The water feeding / absorbing unit according to claim 1, wherein the test or inspection can be performed.

  The invention described in claim 3 is the water feeding / absorbing unit according to claim 1 or 2 mounted on a vehicle.

  The invention described in claim 4 is the water supply / absorption unit according to any one of claims 1 to 3, wherein the water pipe for dry fire extinguishing to be tested or inspected is a dry connected water supply pipe.

  The invention described in claim 5 uses the water supply / absorption unit according to claim 1 to supply the water used for the pressure-resistant test or inspection after being sent to the dry fire-fighting water pipe after the test or inspection is completed. This is a test or inspection method for a dry fire-extinguishing water pipe, which is collected in a water tank and uses the collected water to test or inspect the pressure resistance of the next dry fire-extinguishing water pipe.

  The invention described in claim 6 uses the water supply / absorption unit according to claim 2 to send air to the water pipe for dry fire extinguishing and to perform the airtightness test or inspection, and then to the water supply pipe. Is a method for testing or checking a water pipe for dry fire extinguishing in which pressure resistance is tested or checked.

  The invention described in claim 7 is a test or inspection method for a water pipe for dry fire extinguishing, wherein the test or inspection method described in claim 5 or 6 is performed using the water supply / absorption unit described in claim 3.

  The invention described in claim 8 is the test or inspection method according to any one of claims 5 to 7, wherein the water pipe for dry fire extinguishing to be tested or inspected is a dry connected water pipe.

  The water-absorbing unit for testing or inspection of the dry fire-fighting water pipe according to the present invention and the method for using the same (hereinafter sometimes referred to as “the water-absorbing unit of the present invention and the method for using the same”) are as described above. Therefore, the water used for the pressure resistance test or inspection of the water pipe for dry fire extinguishing can be reliably recovered and used repeatedly without leaving in the pipe. Therefore, there is no risk of corroding the water pipe for dry fire extinguishing, and the amount of water used for testing or inspection can be surely reduced. Therefore, according to the water feeding / absorbing unit of the present invention and the method of using the same, it is not necessary to procure and replenish a large amount of water at the site of testing or inspection of the water pipe for dry fire extinguishing, so that the work efficiency is greatly improved.

  According to the water feeding / absorbing unit of the present invention and its method of use, when water is fed into the dry fire-fighting water pipe for pressure resistance testing or inspection, the suction valve of the vacuum pump is closed and the water feeding valve of the water pump is opened. The water pump may be started, and when water is collected, the water pump of the water absorption pump is closed, the suction valve of the vacuum pump is opened, and the vacuum pump is started. In other words, since the valve operation for feeding and collecting water only needs to open and close two valves, it is very easy, the operation work for pressure resistance test or breathing is reduced, and the occurrence of erroneous operation can be suppressed. .

  In addition, when air is sent to the dry fire-fighting water pipe for airtightness testing or inspection, check the closed state of the water intake valve of the water pump and the suction valve of the vacuum pump, and then turn the air compressor air supply valve on. Open it and start the air compressor. As described above, according to the water feeding / absorbing unit of the present invention and the method of using the same, the valve operation for the airtightness and pressure resistance test or inspection corresponds to the three operations of air feeding, water feeding, and water recovery. Just open and close each one valve. Therefore, overall, the operation labor is greatly reduced and the occurrence of erroneous operations can be greatly suppressed.

  According to the water feeding / absorbing unit and the method of using the same of the present invention, water can be used repeatedly, and the water tank can be downsized (capacity of about 500 to 1000 L), so that the manufacturing cost of the water tank can be suppressed. Moreover, if the water tank is downsized, the vehicle on which it is mounted can also be downsized. Generally, the amount of water required for testing or checking a dry fire-fighting water pipe is about 500 L per location, even for a 15-story building, but about 1000 L (1 ton) is required for a high-rise building. It is. Therefore, according to the water feeding / absorbing unit of the present invention and its method of use, it is sufficient to mount a 500 L water tank on a one-ton car for a normal building test or inspection apart from a high-rise building. is there. Even in the case of a skyscraper, it is sufficient to mount a 1000L water tank on a 2-ton car. Thus, according to the water feeding / absorbing unit of the present invention and the method for using the same, the required cost for the pressure resistance test or inspection of the dry fire-fighting water pipe can be greatly reduced.

  Further, according to the water feeding / absorbing unit of the present invention and the method of using the same, the airtightness test or inspection of the dry fire-fighting water transmission pipe can be carried out using the pressure resistance test or the water feeding / absorbing unit for inspection. There is no need to install an air compressor or generator every time a test or inspection is performed. Therefore, according to the water feeding / absorbing unit of the present invention and its method of use, the labor required for the pressure resistance test or inspection of the dry fire-fighting water pipe can be greatly reduced, and the labor required for the airtightness test or inspection can be greatly reduced. Can be reduced.

  The dry-type fire-fighting water pipe is a dry-type connected water pipe as a typical example, and therefore, as an example of the present invention, a dry-type connected water-pipe pressure test or inspection device, its usage method, and usage method will be described below. In particular, a method for checking the pressure resistance of the dry-type water connection pipe will be described in detail based on the drawings.

  FIG. 1 is a plan view for explaining an example of a water supply / absorption unit for pressure resistance test or inspection of a dry-type water connection pipe according to the present invention.

  In FIG. 1, reference numeral 1 denotes a dry-type connected water pipe that is laid through the building from the first floor of the Sakai high-rise building to the roof, and has water outlets 14, 15, 16, and so on on each floor. Reference numeral 10 denotes a lowermost part of the dry-type water connection pipe 1, which is a pipe portion where water is easily collected. In FIG. 1, the portion is indicated by hatching.

  In FIG. 1, the pipe portion 11 on the first floor of the dry-type water connection pipe 1 is provided with two water supply ports, that is, a water supply port 12 having a check valve 22 and a water supply port 13 having a check valve 23. is there. Reference numeral 24 denotes a press fitting for pushing the check valve 23 open. In other words, the push-in fitting 24 is threaded so that it engages with the screw inside the cap that covers the water inlet 13, and the tip pushes the check valve 23 by pushing the screw to the left while turning the screw. It has an opening mechanism. The push-in fitting 24 may be provided at the water supply port 13, but it is used when collecting water from the connected water supply pipe 1, so it may be attached to the water supply port 13 before the start of water collection. The check valves 22 and 23 are equipped with known ones, and the structure, opening / closing mechanism, operating mechanism of the push-in fitting, and the like are described in detail in Patent Document 1.

  In the case of a fire emergency, attach the water supply port of the fire engine's water supply hose to the water supply port 12 (or water supply port 13) of the dry-type connection water pipe 1, and push open the check valve 22 (or check valve 23) by water pressure. Water is supplied into the connected water pipe 1 and the water outlet (not shown) of the fire hose is fitted to the appropriate water outlets 14, 15, 16,. 31 and 32 are pressure gauges attached to the water supply ports 12 and 13, and 4 is a pressure-resistant rubber water supply and absorption hose (diameter 25 mm) having tip portions 41 and 42.

  In FIG. 1, 5 is a water feeding / absorbing unit mounted on a loading platform X of a 1-ton truck (the range is shown by a one-dot broken line in FIG. 1). The water supply / absorption unit 5 includes a water supply pump P (6.4 PS, 50 L / min, pressurization up to 4 MPa), a vacuum pump V (600 W), an air compressor A (1 PS), a polyethylene water tank 6 (capacity 500 L), pressure resistance It is composed of rubber pipes 71 and 72, 81 and 82, and 9 (both have a diameter of 25 mm).

  The water tank 6 of the water feeding / absorbing unit 5 has a water discharge port 61 having a discharge valve 62 and a water recovery port 63 having a recovery valve 64. 65 is a water inlet. The water pump P has a water inlet P2 and a water inlet P1 with a water supply valve P3, the air compressor A has an air inlet A1 with an air supply valve A2, and the vacuum pump V has an inlet with a suction valve V3. Each has V1 and discharge port V2.

  The water supply / absorption unit 5 connects the water discharge port 61 of the water tank 6 and the water intake port P1 of the water supply pump P with a pipe 71, and a pipe 72 is attached to the end of the water supply port P2 of the water supply pump P to constitute the water supply line 7. is doing. An air compressor A is attached in the middle of the pipe 72. On the other hand, the water recovery port 63 of the water tank 6 and the discharge port V2 of the vacuum pump V are connected by a pipe 82, and a pipe 81 is attached to the tip of the suction port V1 of the vacuum pump V to constitute the water suction pipe 8. Further, in the water feeding / absorbing unit 5, the tip 71 of the water feeding pipe 7 and the tip 81 of the water sucking pipe 8 are combined with a T-shaped pipe 9. One end of the pipe 9 is fitted to the tip 41 of the water feeding / absorbing hose 4.

  A method for feeding water in the water tank 6 to the dry connected water pipe 1 and a method for collecting the water in the water tank 6 using the water feeding / absorbing unit 5 having the above-described configuration will be described.

  When the water in the water tank 6 is fed into the dry connected water supply pipe 1, the other end 42 of the water supply and absorption hose 4 is connected to the water supply port 12 or 13 of the dry connected water supply pipe 1. FIG. 1 shows a state in which the water feeding / suction hose 4 is connected to the water feeding port 12. The water feeding / absorbing hose 4 may be built in the water feeding / absorbing unit 5 and provided.

  In the dry-type water connection pipe 1, all valves are closed. On the other hand, in the water supply / absorption unit 5, the discharge valve 62 of the water tank 6 and the water supply valve P3 of the water supply pump P are opened, and the air supply valve A2 of the air compressor and the intake valve V3 of the vacuum pump are closed. Thus, the water supply pipe 7 constituted by the water discharge port 61, the pipe 71, the water supply pump P, and the pipe 72 of the water tank 6 communicated with the water supply port 12 of the dry-type water connection pipe 1 through the pipe 9 and the water supply / absorption hose 4. It will be. After confirming this communication state, the water pump P is started. Then, the water in the water tank 6 is sent from the water supply line 7 through the pipe 9 and the water supply / suction hose 4 to the water supply port 12 of the connected water supply pipe 1, pushes the check valve 22 by water pressure, and opens from the water supply port 12. It is supplied into the connected water pipe 1.

  When the water pressure in the dry connected water pipe 1 is collected in the water tank 6 after the predetermined pressure resistance check is completed, the water pump P is first stopped and the water valve P3 is closed. When the water supply stops, the check valve 22 returns to the closed state. Next, the push fitting 24 is attached to the water supply port 13 and pushed in while turning to push open the check valve 23. Subsequently, the water supply hose 4 is removed from the water supply port 12, and this is fitted to the tip of the pressing metal fitting 24 attached to the water supply port 13. The recovery valve 64 of the water tank 6 and the suction valve V3 of the vacuum pump V are opened, and the vacuum pump V is started. Then, the water filled in the dry-type water connection pipe 1 passes through the water inlet 13, the water inlet / outlet hose 4, the pipe 9, and the water absorption pipe 8 constituted by the pipe 81, the vacuum pump V, and the pipe 82. Then, it is sucked and collected from the water collection port 63 to the water tank 6. Due to the vacuum of the vacuum pump V, the pipe 10 in which the water in the connected water pipe 1 easily collects is also strongly sucked and the water in the connected water pipe 1 is reliably collected without remaining anywhere. When the water recovery work is finished, stop the vacuum pump V and close the suction valve V3. Next, the tip 42 of the water feeding / absorbing hose 4 is removed from the water feeding port 13 of the connected water feeding pipe 1.

  As described above, the water feeding / absorbing unit 5 of the present embodiment uses the water pump P when water is fed into the dry connected water pipe 1 by valve switching operation, and when water is collected from the dry connected water pipe 1. Is a configuration in which two pumps are used by switching the vacuum pump V, and complete recovery of water is possible by the powerful suction force of the vacuum pump, and a previously developed water supply / absorption unit and method of using the same Compared to the above, since the configuration of the piping is simple, the operation becomes easy, and the production cost of the water feeding / absorbing unit can be kept low.

  In the above embodiment, the dry type connected water pipe having the two water inlets 12 and 13 has been described, but the number of water outlets of the dry type connected water pipe is not limited to two. For example, in the case of a single connected water pipe, after the pressure resistance inspection is completed, once remove the water supply hose from the water inlet, attach a push fitting to the water outlet and push the check valve open. After that, the water supply hose can be attached again.

  Since the water feeding / absorbing unit according to the present invention can be repeatedly used as described above, the water tank can be reduced in size, and thus is suitable for being mounted on a vehicle. Therefore, in the above embodiment, the water feeding / absorbing unit in which the water tank having a capacity of 500 L is mounted on the small truck (1 ton car) has been described. However, the capacity of the water tank and the size of the vehicle body used in the water feeding / absorbing unit according to the present invention are as follows. It is not limited to. For example, the present invention can also be applied to a water feeding / absorption unit in which a water tank having a capacity of 1000 L (1 ton) is mounted on a 2-ton vehicle. Moreover, the water feeding / absorbing unit according to the present invention is not limited to the one mounted on the vehicle. For example, a water supply / absorption unit that inspects a connected water supply pipe using water from a water storage tank installed in the vicinity of the building and collects the water from the water storage tank after the inspection is included in the water supply / absorption unit according to the present invention. Of course.

  Further, the present invention is not limited to the piping method shown in the first embodiment, and various piping methods can be adopted. However, the point is that the water discharge port of the water tank and the water absorption pump are connected. Combine the tip of the water pipe, the water recovery port of the water tank, and the tip of the water suction pipe that connects the vacuum pump, and connect the end of the combined pipe to the water inlet of the dry-type water pipe. By switching the water supply valve of the pump and the suction valve of the vacuum pump, the water in the water tank is sent to the dry connected water supply pipe by the water supply pump, or again in the water tank 6 by the vacuum pump V by switching the valve. Any pipe may be used as long as it can be collected and either can be freely repeated.

  Supplementing the valve operation of the above embodiment, the discharge valve 62 of the water tank 6 is normally left open and hardly operated. Further, since the collection valve 64 of the water tank 6 is normally kept open, it may not be provided. In addition, the attachment position of the valve may be changed as appropriate as long as it does not depart from the configuration of the present invention.

  Note that if a drain outlet with a drain valve is provided in the lowermost pipe of the dry-type connected water pipe, it is easy to empty the water in the connected water pipe. Many of them are not provided with a mouth, and such a dry connected water pipe is likely to have a water reservoir portion by a conventional method.

  Also, many conventional fire hoses are rubberized, but the rubberized hose can supply water in one direction, but it is difficult to reversely feed water. Therefore, as in the present invention, it is necessary to use a pressure-resistant pipe for the piping of the water feeding / absorbing unit that repeats the water feeding and recovery (reverse feeding). As the tube having pressure resistance, the pressure-resistant rubber hose used in this embodiment is suitable, but a stainless steel tube may be used. Since the pressure-resistant rubber hose is flexible, a stainless steel pipe may be used for a part of the pipe (for example, a water supply conduit), and a pressure-resistant rubber hose may be used for the other part. In addition, it is preferable to attach a strainer to the inlet part of a water pump or a vacuum pump in order to prevent foreign material mixing.

  In addition, since the pressure-resistant rubber hose used in Example 1 is usually equipped with a coupler joint, even if a situation where the pipe is detached, the outlet of the pipe is instantly closed, and the water supply / recovery / It is safe to stop because air supply stops.

  Next, a method for checking the airtightness of the water supply pipe using the water supply / absorption unit of Example 1 used for checking the pressure resistance of the dry connected water supply pipe will be described with reference to FIG. Usually, the pressure resistance check (confirmation by water supply) of the dry-type water connection pipe is carried out after the airtightness inspection (confirmation by air) is completed.

  In FIG. 1, first, after confirming that all the valves of the dry type connected water pipe 1 are closed, the water supply port 12 (or the water supply port 13) of the dry type connected water pipe 1 and the tip of the water supply / hose 4 are used. Continue 42. It is also confirmed that the water supply valve P3 of the water supply pump P and the suction valve V3 of the vacuum pump V are closed. After confirmation, the air supply valve A2 of the air compressor A is opened to open the air supply path, and the air compressor A is started. Then, the air passes from the air compressor A through the air supply path, that is, the pipe 72, 9 and the water supply / intake hose 4 to the water supply port 12 of the dry-type connection water supply pipe 1, and the check valve 22 is turned on by the air pressure. Pushed open and fed into the connected water pipe 1 from the water inlet 12. Since the pressure rises if there is no looseness or damage to the piping and all the valves are closed, it can be confirmed with the pressure gauge 3.

  When the airtightness check of the dry connected water pipe 1 is completed, the valves of the outlets 14, 15, 16 on each floor are opened. If it does so, the air in the connection water pipe 1 will lose | release, and a pressure gauge will be set to zero. This completes the check of the airtightness of the dry-type water connection pipe 1, and then the pressure resistance check can be started. Thus, if the water feeding / absorbing unit of the present embodiment is used, it is not necessary to attach another device for checking the airtightness, and the airtightness of the dry-type connected water supply pipe 1 can be checked very easily.

  As mentioned above, although this invention was demonstrated based on two Example which checks the pressure | voltage resistance and airtightness of a dry-type water connection pipe, about dry-type fire-fighting water pipes other than a dry-type water connection pipe, such as a sprinkler equipment and a dry-type water sprinkling equipment Since the structure of the water pipe is the same as that of the dry type connected water pipe, the present invention can be applied in exactly the same manner as the case of the dry type connected water pipe. In addition, since the test methods and inspection methods for various water pipes are exactly the same in that water or air is fed, the procedure of the inspection method described in the examples etc. is required even when testing the pressure resistance and air tightness of various water pipes. It can be done with.

  As explained in detail above, the water-feeding / absorbing unit for a dry fire-fighting water pipe and its method of use according to the present invention can repeatedly use water used for testing or checking a dry-fire water pipe, greatly increasing the amount of water. You can save. Therefore, it is not necessary to procure and replenish a large amount of water at the site. In addition, since the capacity of the water tank can be reduced, the water supply / absorption unit for testing / inspection can be reduced in size, and the vehicle on which the water / absorption unit is mounted is usually a small car of about 1 ton. Therefore, according to the present invention, it is possible to drastically reduce the cost required for the pressure resistance and airtightness test or inspection of the dry fire-fighting water pipe, a typical example of which is a dry-connected water pipe, and to reduce the work load. Can be suppressed. As described above, the present invention is a useful technique for testing or checking a dry fire-fighting water pipe.

The top view for description of the water feeding / absorbing unit according to the present invention (Example 1 and Example 2)

Explanation of symbols

1: Dry connection water pipe,
11: Piping on the first floor of the dry-type water connection pipe, 10: Piping at the bottom of the same,
12.13: Water outlet, 14.15.16: Water outlet on each floor
22/23: Check valve, 24: Push-in bracket
31/32: Pressure gauge 4: Water supply / absorption hose, 41/42: Tip 5: Water supply / absorption unit 6: Water tank, 61: Water discharge port, 62: Discharge valve, 63: Water recovery port, 64: Recovery valve 7: Water supply pipe, 71/72: Piping 8: Water absorption pipe 81/82: Piping 9: Pipe connecting the water supply pipe to the water absorption pipe P: Water pump, P2: Water inlet, P1: Water inlet, P3: Water supply valve V: Vacuum pump V1: Suction port, V2: Discharge port, V3: Suction valve A: Air compressor, A1: Air supply port, A2: Air supply valve X: Range to be mounted on the truck bed

Claims (8)

  Combine the tip of the water pipe that connects the water discharge port of the aquarium and the water pump with the tip of the water suction pipe that connects the water recovery port of the aquarium and the vacuum pump. It can be connected to the water outlet of the water pipe for dry fire extinguishing or the water suction / inhalation hose fitted to it, and all the pipes are constructed of pressure-resistant pipes. By feeding the water pipe and switching the valve, the pumped water is collected into the water tank by the vacuum pump, and by switching the valve again, the work of feeding the water collected in the water tank to the dry fire-fighting water pipe by the water pump can be repeated. A water supply / absorption unit for testing or checking the pressure resistance of a dry fire-fighting water pipe.   An air compressor is installed in the water supply pipe, and the air compressor is started and air is sent from the water supply pipe to the dry fire-fighting water supply pipe. Item 2. The water feeding / absorbing unit according to Item 1.   The water feeding / absorbing unit according to claim 1 or 2, which is mounted on a vehicle.   The water supply / absorption unit according to any one of claims 1 to 3, wherein the water pipe for dry fire extinguishing to be tested or inspected is a dry connection water pipe.   Using the water feeding / absorbing unit according to claim 1, the water used for the pressure-resistant test or inspection after being sent to the dry fire-fighting water pipe is collected in the water tank after the completion of the test or inspection, and the collected water is collected. A test or inspection method for a dry fire-fighting water pipe that uses the pressure resistance test or inspection of the next dry fire-fighting water pipe.   Using the water feeding / absorbing unit according to claim 2, air is fed into a dry fire-fighting water pipe and its airtightness is tested or checked, and then water is fed into the water pipe and its pressure resistance test or inspection is performed. A test or inspection method for water pipes for dry fire extinguishing.   A test or inspection method for a water pipe for dry fire extinguishing, wherein the test or inspection method according to claim 5 or 6 is performed using the water supply / absorption unit according to claim 3. The test or inspection method according to any one of claims 5 to 7, wherein the dry fire-fighting water pipe to be tested or inspected is a dry connected water pipe.

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