Emergency water tank water intake device

Abstract

To provide a water intake device installed to take water from an emergency water tank installed in the middle of a water pipe in an emergency, wherein the device improves workability during installation and maintenance of the water tank, and also solves a problem that occurs on a joint side of a water supply pump when only one water intake pipe is used.SOLUTION: A water intake device for an emergency water tank comprises an upright pipe seat 13 in an upper part of a through hole provided in a sealing lid 12 for sealing a manhole tube 11 of a water tank body 1, wherein a water intake pipe is inserted through the pipe seat and is fixed with a bolt or the like. In the water intake device with one water intake pipe 21, a fire-fighting pipe joint 28 is attached to a repair valve 24 via male and female one-touch water supply pipe joints 27a, 27b.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This invention relates to an emergency water tank installed midway along a water pipe or other piping for supplying fresh water, and more particularly to the structure of a water intake device installed to draw water from the water tank in an emergency. [Background technology]

[0002] Emergency water tanks are usually horizontally or vertically cylindrical and are installed underground. They are connected to inlet and outlet pipes for supplying fresh water during normal times, and are also equipped with a water intake device for extracting water from the tank in an emergency.

[0003] Water intake devices for horizontally placed cylindrical emergency water tanks are shown in Patent Documents 1 and 2, etc. Figure 5 is a diagram showing an example of a conventional water intake device, in which a manhole cylinder 11, which serves as an entrance and exit for workers when performing maintenance and inspection inside the water tank, is provided integrally with the water tank body 1 at the top of the water tank body 1, and a sealing lid 12 is fixed to a body flange 15 at the upper end of the manhole cylinder 11 with bolts.

[0004] The upper part of the sealing cover 12 is a space surrounded by a cylindrical iron manhole frame 35 shown by imaginary lines and an iron cover 36 that is flush with the ground surface GL and closes the upper opening, and this space houses the valves and fittings of the water intake device. In Figure 5, two water intake pipes 21 are provided, one for water supply to draw stored water and one for fire extinguishing.

[0005] The water intake pipe 21 is welded (fixed by welding) to the sealing lid 12, and has an upper end flange 22 welded to its upper end. The water intake pipe 21 is long enough that its lower end opens into the bottom of the water tank body 1, preferably into a water collection pit provided at the bottom, when the sealing lid 12 is closed, and the upper end flange 22 is connected to one-touch pipe joints 27, 28 that connect to a water supply pump that draws up stored water or a fire hose via a repair valve 24 and short pipes 25, 26 for connecting equipment.

[0006] There are various types of pipe fittings, but normally the same type is used for each type of equipment, with most water supply pipe fittings (fittings for water supply pumps) being camlock fittings, and most fire service pipe fittings (fittings for fire hoses) being Machino fittings. Therefore, a male fitting 27 of the camlock fitting and a male fitting 28 of the Machino fitting are attached to the water tank side. In the illustration, the male fitting 28 of the Machino fitting is connected via a female fitting 38 with a fire service screw for a flange connection, and caps 31 and 32 are attached to these fittings 27 and 28.

[0007] In the example of Figure 5, separate intake pipes 21 are provided for water supply and firefighting, but in small water tanks and the like, structures with only one intake pipe are also in practical use. In this case, the pipe joint is a firefighting pipe joint 28, and this is addressed by attaching a firefighting pipe joint (usually a female Machino-type joint) to the suction pipe of the water supply pump that draws water from the water tank. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-129735 [Patent Document 2] Japanese Patent Application Publication No. 10-292445 [Patent Document 3] Utility Model Registration No. 3181093 Summary of the Invention [Problem to be solved by the invention]

[0009] As shown in Figure 5, the conventional water intake pipe 21 was integrated with the sealing lid 12, which made it difficult to fine-tune the sealing lid mounting position during installation and made it impossible to remove the water intake pipe independently for maintenance, resulting in poor workability.

[0010] Furthermore, in a structure with only one water intake pipe 21, a specially designed pump must be prepared as a water supply pump, with the suction pipe fittings being fire-fighting fittings. This not only increases costs, but also poses the risk of problems such as not being able to quickly prepare a replacement pump if the water supply pump breaks down during a disaster.

[0011] This invention has been made to solve the above problems, and its objective is to improve the ease of adjusting the position of the sealing lid 12 and the water intake pipe during installation and maintenance, and to solve the problems that arise on the water supply pump side when only one water intake pipe is used, thereby providing a water intake device with a structure that is easier to work with during maintenance. [Means for solving the problem]

[0012] The water intake device for an emergency water tank of this invention is provided with a riser seat 13 with a mounting flange 14 at its upper end, located above a through-hole provided in a sealing cover 12 that seals a manhole tube 11 of a water tank body 1. The riser seat 13 has an inner diameter larger than the outer diameter of a water intake pipe 21. An upper end flange 22 welded to the upper end of the water intake pipe 21 or an intermediate flange 23 welded below it with a distance that allows the insertion of a tool used for attachment and detachment is fixed to the mounting flange 14 of the riser seat 13. The above-mentioned problem is solved by attaching a water supply pipe fitting 27 or a fire service pipe fitting 28 to the upper end flange 22 via a repair valve 24 and necessary connecting short pipes 25 and 26 or fittings 38 for connecting to a water supply pump or a fire hose.

[0013] In addition, in the water intake device for the emergency water tank of this invention, which has a single water intake pipe 21, the above problem is solved by attaching a fire protection pipe fitting 28 to the repair valve 24 via one-touch male and female water supply pipe fittings 27a, 27b. [Effects of the Invention]

[0014] According to this invention, the water intake pipe 21 can be easily removed from the sealing lid 12 as needed, which makes it easier to adjust the position of the water intake pipe 21 and the sealing lid 12 and to attach and detach them when installing or maintaining the emergency water tank, improving workability at the water tank installation site and making it possible to perform these tasks easily and in a short time.

[0015] Furthermore, even in a structure with only one water intake pipe 21, it is possible to quickly connect a water supply pump and a fire hose equipped with standard pipe fittings, eliminating the need to change pipe fittings and preventing the increase in costs associated with changing pipe fittings. Furthermore, even if the water supply pump does not work in an emergency, a replacement pump can be quickly arranged, resulting in more reliable water supply operations even in an emergency. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a partial cross-sectional front view showing an example of a water intake device of the present invention equipped with two water intake pipes. [Figure 2] An enlarged cross-sectional view showing the main part of FIG. [Figure 3] A partial cross-sectional front view showing an example of a water intake device of the present invention having one water intake pipe. [Figure 4] A diagram similar to Figure 1 showing the installation structure of a water intake pipe without an intermediate flange. [Figure 5] A diagram showing the conventional structure of the water intake device corresponding to Figure 1. DETAILED DESCRIPTION OF THE INVENTION

[0017] The water intake device of the present invention will be specifically described below with reference to the drawings showing the embodiments. Figures 1 and 2 show an example in which the present invention is applied to the water intake device of the conventional structure shown in Figure 5.

[0018] A main body flange 15 is welded to the upper end of a manhole cylinder 11 that is integral with the water tank main body 1, and a sealing lid 12 is detachably attached to the main body flange 15. A riser pipe seat 13, the base end of which is inserted and fixed into a through-hole provided at a position where a water intake pipe 21 passes through, is welded to the sealing lid 12 and erected.

[0019] An upper flange 22 and an intermediate flange 23 are welded to the upper end and lower end of the intake pipe 21. The intake pipe 21 is thinner (e.g., 80A) than the inner diameter of the riser pipe seat 13 (e.g., pipe diameter 100A), and is inserted into the riser pipe seat 13 and fixed by fastening the flanges 14, 22 with bolts and nuts. Therefore, the intermediate flange 23 is an irregular-shaped flange, in the above example, a 100A-type flange with an inner diameter of 80A. The upper flange 22 is a normal flange (an 80A-type flange in the above example) that corresponds to the pipe diameter of the intake pipe 21.

[0020] The water intake pipes 21 of the above structure pass through the sealing lid 12 and open at their ends into a water collection pit provided at the bottom of the water tank body 1. A water supply pipe fitting 27 (e.g., the male side of a camlock type fitting) is attached to one end of each of the upper flanges 22 of the two water intake pipes 21, and a fire protection pipe fitting 28 (e.g., the male side of a Machino type fitting) is attached to the other end, via a repair valve 24 similar to that of the conventional structure and, if necessary, a short pipe 26. Caps 31 and 32 are attached to these pipe fittings 27 and 28 to close the openings of the fittings when not in use.

[0021] When opening the sealing lid 12, the intermediate flange 23 of the intake pipe is removed from the riser pipe seat 13. Even if the intermediate flange 23 is stuck to the mounting flange 14, the upper end flange 22 can be grasped and pulled out, and the intake pipe 21 can be easily pulled out from the riser pipe seat 13. In addition, the intake pipe 21 can be removed from the sealing lid 12 with the repair valve 24 and pipe fittings 27, 28 still connected to the intake pipe 21.

[0022] Figure 3 shows a second embodiment with a single water intake pipe 21, in which a fire protection pipe fitting 28 is connected to a repair valve 24 via male and female water supply pipe fittings 27a and 27b. In the example of Figure 3, a repair valve 24 with a taper pipe thread connection is connected via a short pipe 29 with a lower flange 33 at its lower end that is connected to the upper flange 22 of the water intake pipe and a male taper pipe thread 34 at its upper end, and the male side of a fire protection pipe fitting 28 is connected to the repair valve 24 via male and female water supply pipe fittings 27a and 27b. In the example shown, the water supply pipe fittings 27 (27a and 27b) are camlock type fittings, and the fire protection pipe fitting 28 is a male Machino type fitting, with a Machino type female cap 32 attached to its open end.

[0023] With this structure, a fire hose can be connected immediately by removing the cap 32, and by removing the female connector 27b of the cam lock type coupling, a water supply pump equipped with a standard coupling can be directly connected.

[0024] The intake pipe 21 of the third embodiment shown in Figure 4 has only an upper flange 22, and no intermediate flange. After the sealing cover 12 is fixed to the manhole cylinder 11, the intake pipe 21 is inserted from the upper end of the riser pipe seat 13 and fixed in place with the upper flange 22 of the intake pipe sandwiched between the lower flange 33 of the connecting short pipe 25 and the mounting flange 14. Naturally, gaskets are installed between these flanges 14, 22, and 33 to keep the pipes sealed.

[0025] This structure in which the upper flange 22 is sandwiched between the mounting flange 14 and the lower flange 33 provided on the connecting short pipe 25, etc., does not cause any problems when installing the water tank body, but when pulling out the water intake pipe 21 during maintenance and inspection of the inside of the water tank body, there is no gripping area, so the workability of pulling out the water intake pipe 21 is inferior to the structure of the first embodiment.

[0026] That is, in the structure of Figure 4, the upper end flange 22 of the intake pipe is fastened between the riser pipe seat 13 and the short pipe 25 and is stuck to the mounting flange 14, and it is time-consuming to remove the upper end flange 22 without damaging it, so the structure of Figure 1 can be said to be more preferable.

[0027] As can be understood from the above explanation, this invention has the effect of facilitating the attachment and detachment of the water intake pipe 21 and sealing lid 12 when installing or maintaining the emergency water tank with extremely simple structural changes, and also enabling the connection of a water supply pump or fire hose to the water intake pipe 21 in an emergency to be carried out reliably and quickly. [Explanation of symbols]

[0028] 1 Water tank body 11 Manhole Cylinder 12 Sealing lid 13 Rise pipe seat 14 Mounting flange 21 Water intake pipe 22 Upper flange 22 23 Intermediate flange 23 24 Repair valve 27(27a, 27b) Water supply pipe joint 28 Firefighting pipe fittings

Claims

1. A water intake device for an emergency water tank, comprising a sealing cover for closing a manhole provided at the top of the water tank body, a water intake pipe that penetrates the sealing cover and opens at the bottom of the water tank body, and a water supply or firefighting pipe joint connected to the upper end of the water intake pipe via a necessary repair valve, a riser pipe seat having an inner diameter larger than the outer diameter of the water intake pipe and integrally formed above the through hole of the sealing lid, the water intake pipe being inserted into the riser pipe seat and the through hole and removably fixed to open to the bottom of the water tank body, and the fire fighting pipe fitting being connected to the water intake pipe via a water supply pipe fitting and necessary repair valves.

2. 2. A water intake device for an emergency water tank as described in claim 1, wherein the water intake pipe has an upper end flange at its upper end and an intermediate flange fixed below the upper end flange, and the intermediate flange of the water intake pipe is removably fixed to the mounting flange at the upper end of the riser pipe seat.

3. A water intake device for an emergency water tank is provided with a water intake pipe that penetrates a sealing cover that closes a manhole provided at the top of the water tank body and opens at the bottom of the water tank body, and a fire-fighting pipe joint connected to the upper end of the water intake pipe via a necessary repair valve. A water intake device for an emergency water tank, wherein the fire service pipe joint is connected via a one-touch water supply pipe joint that connects the necessary repair valve and water supply pump.

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