JP6428999B2 - Water sprinkler for storage tank - Google Patents

Description

  The present invention relates to a water spray device for a storage tank capable of easily and effectively cleaning (rust removing) the inside of a water spray facility disposed along the outer peripheral surface of a storage tank for storing a combustible substance such as petroleum. .

In locations where there are multiple storage tanks for storing flammable substances, such as oil tank bases, if a fire occurs in some storage tanks due to some reason, the storage tank in which a fire has occurred There is a risk that the adjacent storage tank will be heated by the radiant heat from the fire, which will cause an explosion flame and spread the fire.
For this reason, in order to prevent a fire from spreading to the adjacent storage tank, water sprinkling pipes equipped with water spray nozzles are laid along the outer peripheral surface of the storage tank. Water is sprayed on the storage tank to cool the tank surface and prevent the fire from spreading.

  Such sprinkling pipes are provided over a predetermined range along the outer peripheral surface of the storage tank assuming radiant heat from other storage tanks, and have a plurality of stages (for example, three stages) in the vertical direction. Is provided. Each watering pipe is attached with a plurality of watering nozzles so as to spray water toward the outer wall surface of the storage tank, and is connected with a water supply pipe for supplying water for watering. When a fire occurs in a specific storage tank, the storage tank adjacent to the storage tank is not heated by the radiant heat, and is stored through a water spray nozzle from a plurality of water spray pipes provided in the storage tank. Water is sprayed all at once toward the outer wall of the tank.

  However, in spite of the sprinkling pipes installed in preparation for emergencies as described above, water is not frequently sprinkled, so when rusting occurs inside the sprinkling pipes, Since rust is clogged in the watering nozzle, water cannot be sufficiently sprayed, and the original cooling capacity cannot be exhibited, so there is a risk that the fire may spread due to the radiant heat of the burning flame.

  For this reason, conventionally, a blow nozzle is provided on the flange attached to the end of the sprinkling pipe at the same height as the bottom surface of the inner wall of the sprinkling pipe, and water is fed into the sprinkling pipe at a predetermined pressure. Thus, a configuration is considered in which solid matter such as rust accumulated at the end of the sprinkling pipe is discharged together with water from the blow-use nozzle (see Patent Document 1).

JP 2006-263579 A

However, since the sprinkling pipes are provided in a plurality of stages at a predetermined height so that the storage tank can be effectively cooled, they are deposited inside the sprinkling pipes using the conventional method described above. In order to remove the rust, it is necessary to attach a flange equipped with a blow-use nozzle to the end of the water sprinkling pipe while solid matter mixed with rust is deposited on the end of the water sprinkling pipe. Therefore (see paragraphs [0043] and [0051]), a scaffold is temporarily installed along the wall of the tank near the end of each watering pipe, and a flange equipped with a blow-use nozzle is climbed up to the end of the watering pipe. Must be installed.
For this reason, the work for removing rust in the water sprinkling pipe is large, and it takes a lot of work, so the inside of the water sprinkling equipment cannot be frequently cleaned.

Also, the blow nozzle is planned to use the same nozzle as the already used water spray nozzle. If this blow nozzle is clogged with solid matter such as rust, the inside of the water spray pipe will no longer be used. There is also a disadvantage that it is impossible to remove the rust accumulated on the nozzle and the effect of preventing clogging of other watering nozzles cannot be obtained. For this reason, when the drainage from the blow combined nozzle is insufficient, it is necessary to inspect and clean each watering nozzle one by one.
The present invention has been made in view of such circumstances, and by reliably removing rust adhering to or accumulating inside the sprinkling pipe and providing a cleaning function for each sprinkling nozzle, clogging of each sprinkling nozzle can be achieved. The main object is to provide a watering device for a storage tank that can prevent and reduce the frequency of inspection and cleaning, or omit inspection and cleaning.

In order to achieve the above object, a water storage device for a storage tank according to the present invention is connected to a water supply pipe erected from the ground surface and the water supply pipe, and is disposed along a wall surface in the circumferential direction of the storage tank. A sprinkling pipe, a sprinkling nozzle provided in the sprinkling pipe and sprinkling water toward the storage tank, and an on- off valve provided near the ground surface of the water supply pipe, and connected to a terminal portion of the sprinkling pipe , It is characterized by having a drain pipe that extends near the ground surface and can discharge to the ground surface, and an on- off valve provided near the ground surface of the drain pipe.

  Therefore, at the time of periodic inspection, the on-off valve provided near the surface of the ground can be opened and the water flowing in the sprinkling pipe can be discharged at a stretch through the drainage pipe along with the rust in the sprinkling pipe. The work (blow work) can be performed while being on the ground, and rust accumulated in the watering pipe can be removed. Moreover, since the drainage of the sprinkling pipe can be performed with the end of the drainage pipe being opened largely without using a nozzle, the drainage pipe can be discharged without clogging solid matter such as rust in the drainage pipe. Furthermore, when water is drained through the drainage pipe, water flows greatly in the watering pipe, so that the outside air is introduced through the watering nozzle due to the ejector effect in the watering nozzle. It is possible to remove solid matter such as rust adhering to and depositing on the surface by the sucked air, and it is possible to double the cleaning of the watering nozzle.

  Here, when watering pipes are provided in a plurality of stages in the vertical direction, each watering pipe is supplied with water for watering from a common water supply pipe, and the terminal part of each watering pipe is It may be connected to a common drain pipe or may be connected to individual drain pipes.

  When connected to a common drainage pipe, it is possible to clean (rust removal) all sprinkling pipes and nozzles by operating a single on-off valve, enabling efficient cleaning (rust removal) work. Become. In addition, when individual drainage pipes are connected to each water sprinkling pipe, it becomes possible to clean the water sprinkling pipe and the water sprinkling nozzle (rust removal) on a per sprinkling pipe basis. In addition, it is possible to confirm the suitability of cleaning (rust removal).

In addition, although the example of a structure which connects drainage piping with respect to sprinkling piping was shown, the termination | terminus part of sprinkling piping may be extended near the ground surface, and you may make it provide an on-off valve in the vicinity of the termination | terminus.
Further, the on-off valve provided on the water supply pipe and the on-off valve provided on the drain pipe are constituted by electromagnetic valves, and the on-off valve provided on the water supply pipe and the on-off valve provided on the drain pipe are opened. Even if the on-off valve provided on the water supply pipe and the on-off valve provided on the drain pipe are automatically controlled to be in a closed state after a predetermined time has elapsed since the state,
A water quality detection sensor for detecting the degree of turbidity of water discharged from the drainage pipe is provided, and an on-off valve provided on the water supply pipe and an on-off valve provided on the drainage pipe are configured by electromagnetic valves, and the water supply When the on-off valve provided on the pipe and the on-off valve provided on the drain pipe are opened, and the water quality detection sensor detects that the degree of water turbidity is below a predetermined value, the water supply pipe The on / off valve provided on the drain pipe and the on / off valve provided on the drain pipe may be automatically controlled to be closed.

As described above, according to the watering device for a storage tank according to the present invention, an on- off valve is provided near the surface of the water supply pipe that is erected from the surface and connected to the watering pipe, and the outer peripheral surface of the storage tank. A drainage pipe that extends near the surface of the water and is connected to the end of the sprinkling pipe along the surface of the water pipe, and an open / close valve is provided near the surface of the drainage pipe. Opening the on- off valve provided near the surface of each drainage pipe makes it possible to discharge rust, etc. adhering to or accumulating inside the sprinkling pipe together with water at once. Accumulated rust and the like can be reliably removed. Also, the ejector effect associated with the flow of water in the sprinkling pipe can clean the inside of the sprinkling nozzle, reduce the frequency of inspection and cleaning of each sprinkling nozzle, or omit inspection and cleaning. It becomes possible.

FIG. 1 is an explanatory diagram for explaining the location and range of the storage tank sprinkler according to the present invention attached to the storage tank. FIG. 2 is a schematic view showing a state in which the storage tank sprinkler according to the present invention is attached to the storage tank. FIG. 3 is a diagram showing the vicinity of the end portion of the sprinkling pipe, the drainage pipe connected to the end portion, and the vicinity of the end thereof. FIG. 4A is a diagram showing a state in which rust or the like has accumulated in the sprinkler pipe and the drain pipe connected thereto, and FIG. 4B shows the drain pipe connected to the sprinkler pipe with the on-off valve opened. It is a figure which shows the state which discharges | emits the rust etc. which were accumulate | stored in piping with water. FIG. 5 is a schematic view showing another state in which the storage tank sprinkler according to the present invention is attached to the storage tank.

Hereinafter, an embodiment of a watering device for a storage tank according to the present invention will be described with reference to the accompanying drawings.
In FIG. 1, a storage tank sprinkler 1 is disposed substantially horizontally along a peripheral wall surface of each storage tank in a place such as an oil tank base in which a plurality of storage tanks 2 for storing combustible substances are arranged side by side. And it is provided so that the part which opposes another storage tank may be covered (For example, in the case where three storage tanks 2 are adjacent as shown in FIG. It is provided over a range of about 120 degrees so as to cover the range facing the two storage tanks).

  As shown in FIG. 2, each of the storage tank sprinklers 1 includes a sprinkler pipe 3 and a sprinkler pipe 3 disposed in the circumferential direction in a state of being slightly separated from the wall surface along the outer peripheral face of the storage tank 2. A water spray nozzle 4 that sprinkles water toward the storage tank 2, is connected to the start end of the water spray pipe 3, and is provided near the surface of the water supply pipe 5. And an open / close valve 8 connected to the end portion of the water sprinkling pipe 3 and extending to near the ground surface, and an open / close valve 8 provided near the end of the drain pipe 7 (near the ground surface). Configured.

  The sprinkling pipe 3, the water supply pipe 5, and the drain pipe 7 may be configured by connecting a plurality of piping members, or may be configured by a single long pipe. In this example, the water sprinkling pipes 3 are provided in parallel in three stages up and down at a predetermined interval, and each of the water sprinkling pipe 3 and the water supply pipe 5 and each of the water sprinkling pipe 3 and the drain pipe 7 are respectively provided. The flanges provided at the end of each are abutted and connected by bolts or the like.

  The watering nozzle 4 is installed with the spout facing toward the wall surface of the storage tank 2 and may be attached upward to the top of the watering pipe 3 or attached downward to the bottom ( In this example, in order to suck air by an ejector effect which will be described later, it is attached upward at the top of the watering pipe (the upper part of the side surface of the watering pipe).

  In this example, the start ends of the water sprinkling pipes 3 are connected to a common water supply pipe 5, and water for sprinkling is supplied from the water supply pipe 5 at the same time. Moreover, the terminal part of each sprinkling pipe 3 is connected to a common drain pipe 7 so that the water flowing through the sprinkler pipe 3 can be collected and drained through the drain pipe 7.

  The on-off valve 6 provided on the water supply pipe 5 and the on-off valve 8 provided on the drain pipe 7 are constituted by publicly known, for example, simultaneous open valves, and are provided on the drain pipe 7 of FIG. 8, the interior is divided into a primary side chamber 11 and a secondary side chamber 12 by an oblique partition wall 10, and a communication hole 13 that communicates the primary side chamber 11 and the secondary side chamber 12 is formed in the partition wall 10. The communication hole 13 is opened and closed by a bottomed cylindrical valve element 14.

  In the above configuration, when it is desired to clean the sprinkling pipe 3 or the sprinkling nozzle 4 during periodic inspections (when it is desired to remove solid matter such as rust accumulated in the sprinkling pipe 3 or the sprinkling nozzle 4), The on-off valve 8 is opened and the on-off valve 6 of the water supply pipe 5 is opened so that water can be supplied to each water sprinkling pipe 3 and water supplied to the water sprinkling pipe 3 can be drained through the drain pipe 7. In this state, water of a predetermined pressure is supplied to each sprinkling pipe 3 through the water supply pipe 5. Then, the water supplied to each water sprinkling pipe 3 is discharged from the water sprinkling pipe 3 and then discharged to the ground via the drain pipe 7 without being ejected from each water sprinkling nozzle 4.

  Thereby, as shown in FIG. 4 (a), solid matter such as rust adhered or deposited in the water sprinkling pipe 3 or the drainage pipe 7 is removed from the drainage pipe 7 as shown in FIG. 4 (b). It is discharged to the surface with water at once. At this time, also in the watering nozzle 4, the outside air is sucked into the watering nozzle 4 from the ejection port 4 a by the ejector effect obtained by flowing water through the watering pipe 3. Solid matter such as rust adhered or deposited can be sent into the water sprinkling pipe 3 and discharged from the drain pipe 7 by the water flowing through the water sprinkling pipe 3.

  The operator visually confirms the color (transparency) of the water drained from the drain pipe 7 and confirms that the color of the water is colorless and transparent, so that the water spray pipe 3 and the water nozzle 4 (subtract) After confirming that solid matter such as rust adhered or accumulated in the drain pipe 7) has been removed, and confirming this, the on-off valve 6 is closed and water is supplied from the water supply pipe 5 to the sprinkling pipe 3. While stopping, the on-off valve 8 is closed to release the drained state.

  Therefore, the operator can clean the inside of the water sprinkling pipe by operating the on-off valves 6 and 8 provided near the ground surface and performing a blow process for discharging solid matter such as rust in the water sprinkling pipe 3. (Solid solids such as rust adhering or depositing inside the sprinkling pipe can be reliably removed), and pulling can be done by removing solid matter such as rust adhering or accumulating in the watering nozzle 4 Since the nozzle can be cleaned, the worker can clean the sprinkling pipe 3 and the sprinkling nozzle 4 while staying on the ground, and does not have to climb up to a high place where the sprinkling pipe 3 is provided. . For this reason, the frequency which inspects or cleans each watering nozzle 4 individually can be reduced, or inspection / cleaning of the watering nozzle 4 can be omitted.

The above configuration is a configuration example in which the terminal end of the water sprinkling pipe 3 is connected to the common drain pipe 7. However, as shown in FIG. The water spray pipes 3 may be blown (cleaned) individually.
According to such a structure, it becomes possible to confirm whether solid matters, such as rust, were removed for every watering pipe, and it becomes possible to manage the removal work of rust for every watering pipe.

  The on-off valves 6 and 8 may be manually operated open / close valves or may be configured as electrically opened / closed electromagnetic valves. In particular, when the on-off valve is composed of an electromagnetic valve, for example, a means for measuring the time after the on-off valves 6 and 8 are opened is provided, and at the start of the blow process (when a command signal for starting the blow process is transmitted) In addition, the on-off valve 6 is opened to start water supply from the water supply pipe 5 to the sprinkling pipe 3, and the on-off valve 8 is opened to allow drainage from the drain pipe 7. After a lapse of time, the on-off valve 6 is closed to stop the supply of water from the water supply pipe 5 to the sprinkling pipe 3, and then a series of operations for automatically closing the on-off valve 8 and stopping the drainage from the drain pipe 7 is automatically performed. You may make it let.

  In addition, a water quality detection sensor for detecting the degree of turbidity of the discharged water is provided, and when the blow process is started (when a command signal for starting the blow process is transmitted), the on-off valve 6 is opened and the water supply pipe 5 is sprinkled. 3 is started and the on-off valve 8 is opened to allow drainage from the drain pipe 7. After the on-off valves 6 and 8 are opened, the water quality detection sensor indicates that the degree of water congestion is not less than a predetermined time. When it is detected that it is below the predetermined value, the on-off valve 6 is closed to stop the water supply from the water supply pipe 5 to the sprinkling pipe 3 and the on-off valve 8 is closed to stop the drainage from the drain pipe 7. A series of operations may be automatically performed.

In the above example, the sprinkling pipe 3 and the drain pipe 7 are shown by connecting the flanges provided at the ends of the splicing pipes 3 to each other. An on-off valve 8 may be provided in the vicinity of the terminal end of the water sprinkling pipe 3 extended to near the ground surface (in the configuration of FIG. 5, the water sprinkling pipe 3 is extended instead of the drainage pipe 7 to be near the ground surface. Down).
Even with such a configuration, it is possible to obtain the same effects as the above configuration example.

DESCRIPTION OF SYMBOLS 1 Watering device for storage tanks 2 Storage tank 3 Watering piping 4 Watering nozzle 7 Drainage piping 8 On-off valve

Claims (5)

A water supply pipe erected from the ground surface;
A watering pipe connected to the water supply pipe and disposed along the wall surface in the circumferential direction of the storage tank;
A watering nozzle that is provided in the watering pipe and sprays water toward the storage tank;
In a storage tank sprinkler equipped with
An on-off valve provided near the surface of the water supply pipe;
A drainage pipe connected to the terminal end of the sprinkling pipe, extending near the ground surface and allowing discharge to the ground surface;
An opening and closing valve provided near the surface of the drain pipe,
A watering device for a storage tank, comprising: The watering pipe is provided in a plurality of stages in the vertical direction,
Each watering pipe is connected to the common water supply pipe,
The watering device for a storage tank according to claim 1, wherein a terminal portion of each watering pipe is connected to the common drainage pipe. The watering pipe is provided in a plurality of stages in the vertical direction,
Each watering pipe is connected to the common water supply pipe,
The sprinkler for a storage tank according to claim 1, wherein a terminal portion of each sprinkling pipe is connected to the individual drainage pipe. An on-off valve provided on the water supply pipe and an on-off valve provided on the drain pipe are constituted by electromagnetic valves,
The open / close valve provided in the water supply pipe and the open / close valve provided in the drain water pipe are closed after a predetermined time has elapsed since the open / close valve provided in the water supply pipe and the open / close valve provided in the drain pipe are opened. The watering device for a storage tank according to any one of claims 1 to 3, wherein the watering device is automatically controlled. A water quality detection sensor for detecting the degree of turbidity of water discharged from the drain pipe is provided,
An on-off valve provided on the water supply pipe and an on-off valve provided on the drain pipe are constituted by electromagnetic valves,
When the on-off valve provided on the water supply pipe and the on-off valve provided on the drain pipe are opened, and the water quality detection sensor detects that the degree of water contamination is below a predetermined value, 4. The water spray device for a storage tank according to claim 1, wherein the on-off valve provided in the water supply pipe and the on-off valve provided in the drain pipe are automatically controlled to be closed. 5.

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