Water injection confluence member, water supply construction method using a siphon water supply device having a water injection confluence member

Abstract

To provide a water injection merging member capable of preventing flowing water from being blocked within the water injection merging member by preventing the ends of elongated floating objects from getting caught in the uneven shape forming an inside of the water injection merging member, and subsequent floating objects from getting caught on top of the caught floating objects and blocking the water flow cross section.SOLUTION: In a water injection merging member 30 used in a siphon water supply device 200 that moves water from a reservoir in a high water level area to a low area, the water injection merging member 30 comprises a linear siphon main pipe member 31 connected to a siphon water suction pipe 11, a water supply device side pipe member 32 that is provided to join an opening formed on a side surface of the siphon main pipe member 31 and is connected to a backflow prevention device or a water supply device connection pipe at an upstream end. The merging portion is provided with a switching valve via a hinge, which switches the flow of water from a side pipe member 32 for water supply device water injection and the flow of water from the siphon main pipe member 31.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a water supply method using a siphon water supply device having a water injection confluence member used for a siphon water supply device that supplies water in a storage section in a high water level area to a low area located lower than the high water level area.

Background Art

[0002] A siphon water supply device is for laying a pipe member between a storage section in a high water level area and a low area and supplying water in the storage section in the high water level area to the low area by siphon action. The present inventor has proposed a water injection confluence member as one of the members for activating and operating the siphon action (Patent Document 1). The water injection confluence member is connected to a part of the pipe member for operating the siphon, is formed in a substantially Y shape by a water injection section, a water absorption section, and a water supply section, and is installed with the sides forming the two branches of the Y shape facing the upstream direction where the storage section is located. One of the two branches is connected directly or via a backflow prevention device to a water supply device connection pipe which is a pipe member connected to a water supply device at its tip. The other of the two branches is installed with a float in the storage section and connected to a siphon water absorption pipe member having a siphon water absorption port at its tip for performing siphon water absorption when performing a water supply operation by the siphon. The side forming one of the Y shapes of the water injection confluence member is arranged toward the downstream side and is used when performing a water injection operation into a siphon water supply pipe whose downstream end to be connected serves as a discharge port. Inside the confluence point of the two branches of the water injection section and the water absorption section, a switching valve for switching the flow directions of the water supply device and the siphon flow is provided.

[0003] In the siphon water supply system described above, first, the siphon intake is placed in the storage area in the high water level region, and the discharge port is placed in the low area. A confluence member with an inlet is placed within the entire length of the pipe member, and the inlet is connected to the water supply equipment via either a backflow prevention device and / or a water supply equipment connection pipe. When water is injected by the water supply equipment into the inlet of the confluence member connected to the pipe member, the water is forcefully injected downstream through the confluence member. In other words, it flows forcefully down towards the low area. If this state continues for a while, at least the pipe member on the low area side of the confluence member will remain full of water, with water flowing through it, even as water is discharged from the discharge port. When this state is reached, the water supply to the pipe member by the water supply equipment is stopped. Even when the water supply stops, water continues to be pulled out by gravity from the discharge port in the low area downstream, so the water that is full in the pipe member flows downstream. This downstream flow causes air within the siphon intake pipe to be released from the downstream discharge port via the water injection confluence member. Simultaneously, water from the reservoir is drawn into the siphon intake pipe from the siphon intake port in the high-water level area. This creates a full-water connection between the reservoir water in the high-water level area and the discharge port of the pipe laid in the low-water area, ensuring that the siphon function is fully operational.

[0004] The conventional water inlet confluence member 300 used in this manner had a recess 311, as shown in Figure 11, so that the tip of the switching valve 310 would fit completely outside the water passage cross-section. The siphon water supply device 400 was designed with the assumption that siphon water intake would continue for a long time after the siphon water supply was started, and a fine mesh basket was attached to the siphon water intake port for dust prevention. Since the mesh size of this basket was less than one-third the diameter of the pipe member for siphon water supply, floating matter such as fallen leaves that passed through the mesh was discharged directly from the outlet at the downstream end of the pipe member, as expected, and there were no problems. However, Figure 11B As shown, the mesh size of this basket is smaller than the water passage cross-section of the pipe member. Sometimes, floating debris such as branches 314 that are longer than the width of the mesh may pass through the mesh in a vertical direction. When these debris flow downstream, changing direction due to turbulence in the hose, if one end of the elongated floating debris gets caught in the recess 311 provided for housing the tip of the switching valve 310 of the water inlet confluence member 300, the other end of the floating debris will get caught in the other recess 311 and stop. In this case, the elongated floating debris will be pressed down and fixed in place by the force of the water.

[0005] Then, fallen leaves and other objects smaller than the diameter of the pipe member are sucked in and flow down, causing them to get caught on the elongated floating objects fixed in the recess 311, and eventually Figure 11C As shown, this completely blocks the water passage cross-section. Because the water passage cross-section is completely closed, the water drawn in by the siphon stops flowing down. The water in the pipe member downstream of the water injection confluence member 300 tries to flow downstream due to its potential energy, but because the incoming water is blocked within the water injection confluence member 300, the negative pressure inside the pipe member becomes extremely large. This causes the pipe member near the direct downstream section of the water injection confluence member to collapse, and the siphon water supply operation also stops. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2014-196656 [Overview of the project] [Problems that the invention aims to solve]

[0007] Therefore, the present invention has been made in view of these problems, and aims to provide a water inlet confluence member that can prevent one end of an elongated floating object from getting caught and thus prevent the flowing water from being blocked within the water inlet confluence member 300. [Means for solving the problem]

[0008] To achieve the above-mentioned main objective, the present invention employs the following means. The water inlet confluence member according to the present invention is In a water injection confluence member used in a siphon water supply system that moves water or water and sediment from a storage area located in a high-water level area to a low-lying area located below the high-water level area, The water injection junction member comprises a straight siphon main pipe member connected to a siphon water intake pipe at an upstream opening and a siphon drain pipe having an air intake section at a downstream opening, and a water supply equipment water injection side pipe member provided at a junction opening on the side of the siphon main pipe member and connected to a water supply equipment connecting pipe or backflow prevention device on the upstream side, and the overall shape is characterized by forming a shape that is roughly the same as the Japanese katakana character "ト".

[0009] The conventional roughly Y-shaped water inlet confluence member had a bent shape rather than a straight shape for the water passage on the siphon side, resulting in an uneven structure on its inside. As a result, floating debris inside the pipe member 10 would get caught on the uneven portion 311, eventually blocking the water passage. However, by making the confluence roughly T-shaped and eliminating the uneven structure at the confluence, the shape of the siphon water intake pipe was made straight, eliminating the uneven structure that would cause floating debris to get caught. This reduces phenomena such as floating debris accumulating into clumps that block the water passage and stop the siphon water supply operation, or the siphon hose downstream of the blocked clump being crushed by negative pressure.

[0010] Furthermore, in the water injection confluence member according to the present invention, a switching valve is provided via a hinge at the confluence of an opening provided on the side surface of the siphon main pipe member and the water injection side pipe member of the water supply equipment, for switching between the flow of water from the water injection side pipe member of the water supply equipment and the flow of water from the siphon main pipe member.

[0011] Furthermore, in the water injection confluence member according to the present invention, the switching valve may be characterized by using a confluence section notch cut out when an opening is provided on the side surface of the siphon main pipe member.

[0012] The notched piece created when the junction of the siphon main pipe member is notched naturally closely matches the shape of the opening at the junction on the side of the siphon main pipe member. By attaching this piece to the junction via a hinge, it can be used as a switching valve for the junction, thereby creating a switching valve of the appropriate size.

[0013] Furthermore, the water injection confluence member according to the present invention may be characterized in that an opening / closing device is provided at the upstream opening of one of the siphon main pipe members that forms a bifurcated shape with the siphon main pipe member and the water supply equipment water injection side pipe member of the water injection confluence member, and an opening / closing device or a backflow prevention device is provided at the upstream opening of the other water supply equipment water injection side pipe member.

[0014] By adopting this configuration, it becomes possible to omit the switching valve that switches the direction of flow, which is installed at the junction of the siphon main pipe member and the side pipe member for water injection of the water supply equipment.

[0015] Furthermore, in the water injection confluence member according to the present invention, the water injection side pipe member for the water supply equipment may be characterized by being formed in a bent shape.

[0016] By bending the side pipe member for water injection into the water supply equipment, the angle between the siphon suction pipe connected to the siphon main pipe member and the water injection equipment connecting pipe or backflow prevention device connected to the side pipe member for water injection into the water supply equipment becomes acute, allowing the water injection junction member to be installed in a narrower area.

[0017] Furthermore, in the water injection confluence member according to the present invention, the side pipe member for water injection into the water supply equipment may be characterized by having a straight shape.

[0018] By using such straight pipes, the processing cost of creating angles in the side pipe members for water supply equipment is eliminated, making it possible to manufacture water inlet confluence members more cheaply and easily.

[0019] Furthermore, in the water injection confluence member according to the present invention, the upstream opening of the side pipe member for water injection of the water supply device connected to the water supply device connection pipe or the backflow prevention device and the upstream opening of the siphon main pipe member connected to the siphon water absorption pipe may be characterized in that the openings are formed in parallel facing the same direction.

[0020] By arranging the flanges on the side of the first opening and the flanges on the side of the second opening in parallel to form a structure in which the water supply device connection pipe and the siphon water absorption pipe can be arranged side by side, the water supply device connection pipe and the siphon water absorption pipe can be arranged more compactly.

[0021] Furthermore, in the water injection confluence member according to the present invention, the upstream opening of the side pipe member for water injection of the water supply device connected to the water supply device connection pipe or the backflow prevention device may be formed in an elliptical shape, and a connection fitting of a backflow prevention device having a circular opening may be connected to the opening.

[0022] With the centers of the circular openings of the circular opening and the upstream end opening of the side pipe member for water injection of the water supply device on the water supply device connection pipe side being aligned, and the flange member being connected and fixed to the upstream end opening of the side pipe member for water injection of the water supply device, the water flow from the water supply device connection pipe to the side pipe member for water injection of the water supply device can be made smooth without manufacturing a flange member with a specially ordered opening by aligning the centers of the circular openings of the mutual flanges and connecting them.

[0023] Also provided is a siphon water supply device including a water injection confluence member and being connected to the discharge part of a water supply device directly or via a short water supply device connection pipe to the upstream opening of the side pipe member for water injection of the water injection confluence member.

[0024] By directly connecting the discharge part of the water supply device to the upstream opening of the side pipe member for water injection of the water injection confluence member, the water supply device connecting pipe becomes unnecessary, or when connecting the discharge part of the water supply device and the upstream opening of the side pipe member for water injection of the water supply device via a short water supply device connecting pipe, the length of the water supply device connecting pipe to be used becomes extremely short, thus having the effect of reducing the cost of materials. Further, when the water depth of the storage part is deep enough to immerse the water supply device and the water injection confluence member, the water injection confluence member will also be immersed in water together with the water supply device. Therefore, even if the airtightness of the welded part is incomplete during the manufacture of the water injection confluence member, since it is immersed in water, it will not suck air from the gap part, and will not affect the siphon action at all and can continue the siphon action.

[0025] Furthermore, an opening / closing device is provided at the upstream opening of one of the siphon main pipe members forming a bifurcated shape by the siphon main pipe member of the water injection confluence member and the side pipe member for water injection of the water supply device, and an opening / closing device or a backflow prevention device is provided at the upstream opening of the other side pipe member for water injection of the water supply device, so as to provide a water injection confluence member that omits a switching valve for switching the flow direction provided at the confluence part of the siphon main pipe member and the side pipe member for water injection of the water supply device.

[0026] Furthermore, a siphon water supply device using the above-described water injection confluence member and a siphon water supply method using these are also provided.

Brief Description of the Drawings

[0027] [Figure 1] FIG. 1 is a side view showing an outline of the configuration of a siphon water supply device 200 using a water injection confluence member 30 according to the first embodiment. [Figure 2] FIG. 2 is an explanatory diagram for explaining the water injection confluence member 30 according to the first embodiment. [Figure 3] FIG. 3 is a diagram showing an example of a method for manufacturing the water injection confluence member 30 according to the first embodiment. [Figure 4] FIG. 4 is an explanatory diagram for explaining the water injection confluence member 30 according to the first embodiment. [Figure 5] Figure 5 is an explanatory diagram illustrating another embodiment of the water injection confluence member 30 according to the first embodiment. [Figure 6] Figure 6 is an explanatory diagram illustrating a method for manufacturing another embodiment of the water injection confluence member 30 according to the first embodiment. [Figure 7] Figure 7 is an explanatory diagram illustrating the switching valve 35 of the water injection confluence member 30 according to the first embodiment. [Figure 8] Figure 8 is an explanatory diagram illustrating another embodiment of the water injection confluence member 30 according to the first embodiment. [Figure 9] Figure 9 is an explanatory diagram illustrating the connection of the discharge section 20a of the water supply equipment 20 to the upstream opening of the water supply equipment water supply side pipe member 32 of the water supply equipment water supply confluence member 30, either directly or via the water supply equipment connection pipe 12, in the second embodiment. [Figure 10] Figure 10 is an explanatory diagram illustrating the contents of a water inlet confluence member in the third embodiment, which is equipped with an opening / closing device on one of the bifurcated sides of the water inlet confluence member 30 and an opening / closing device or a backflow prevention device on the other side. [Figure 11] Figure 11 is an explanatory diagram illustrating a conventional siphon water supply device 400. [Modes for carrying out the invention]

[0028] (First Embodiment) First, an example of a siphon water supply device 200 equipped with the water injection confluence member 30 according to the present invention will be described. A siphon water supply device 200 according to the first embodiment is shown in Figure 1. Figure 1 is a diagram showing the schematic configuration of the siphon water supply device 200 according to the first embodiment. The siphon water supply device 200 according to the first embodiment mainly comprises a pipe member 10 consisting of a siphon water intake pipe 11 for drawing in water, a water supply equipment connecting pipe 12 or backflow prevention device 24 connected to a water supply equipment 20 such as a submersible pump for starting the siphon water supply device 200, and a siphon drain pipe 13 having an air intake section 14 for draining the water drawn in by the siphon, and a water supply equipment 20 such as a submersible pump.

[0029] The pipe component 10 used in the siphon water supply operation is a rigid hose or pipe material (hereinafter referred to as "hose") whose cross-sectional shape does not easily deform. Examples of hoses made of rigid materials include commonly known suction hoses, hoses made of rigid polyethylene or polyvinyl chloride, and steel pipes. The siphon suction pipe 11 is located in the storage area 90 of a pool, pond, swamp, river, dam, etc., which is in the upstream or high water area, and a debris trap basket 15 is provided at the siphon suction port 11a at its tip. A float 16 is also attached to the siphon suction port 11a so that it is located in the middle of the storage area 90. The water supply equipment connecting pipe 12 has a water supply device 20 located at its tip, and the water supply equipment 20 can be turned on / off by a generator 22. A backflow prevention device 24 to the pump side is provided between the water injection confluence member 30 and the water supply equipment connecting pipe 12. The backflow prevention device 24 to the pump side consists of a hose made of a flexible material. When the forced water supply from the electrically powered water supply equipment 20 is turned off, the water in the siphon drain pipe 13 downstream from the top of the pipe flows towards the discharge port 13a at the downstream end due to potential energy (gravity), drawing air from the siphon suction pipe 11 downstream. As a result, water from the storage section is drawn into the siphon suction pipe 11 from the siphon suction port 11a at the upstream end of the siphon suction pipe 11. If the backflow prevention device 24 is not blocked and remains hollow when passing through the water injection confluence member 30, water will flow back towards the water supply equipment 20, passing through the water supply equipment and returning to the storage section. To prevent this phenomenon, stopping the water injection into the siphon drain pipe causes the water in the water supply equipment connection pipe 12 and the backflow prevention device 24 to return to the storage section due to gravity. This causes the hose material of the backflow prevention device 24, which is made of a soft material, to become blocked, blocking the flow of water and thus preventing backflow. The negative pressure inside the backflow prevention device and the external atmospheric pressure cause the hose material of the backflow prevention device to become blocked, preventing backflow in the direction of the pump (storage section) even when the siphon-driven water reaches the water injection confluence member. The discharge port 13a of the siphon drain pipe 13 is installed at a position lower than the water level 90a of the storage section 90 so that the siphon effect can be exerted.The discharge port 13a is equipped with a flow rate adjustment device 13b for adjusting the flow rate and a discharge port air backflow prevention device 13c, which prevents air from flowing back into the pipe member 10 by installing the discharge port higher than the pipe member directly upstream of the discharge port.

[0030] As shown in Figure 2, the water inlet confluence member 30 includes a first opening 37 for connecting to the siphon suction pipe 11, a second opening 38 for connecting to the water supply equipment connection pipe 12 or the backflow prevention device 24, and a third opening 39 for connecting to the siphon drain pipe 13 which has an air intake section 14. The water inlet confluence member 30 is formed in a shape roughly resembling the letter Y or the Japanese character "ト" such that the water channels of the first opening 37 and the second opening 38 merge at an acute angle. The ends of each opening (37-39) of the water inlet confluence member 30 are equipped with flanges that have a connecting function, allowing for easy and secure connection to the flanges of the conventional pipe member 10.

[0031] The backflow prevention device 24 plays an important role when starting the siphon water supply operation. It is made from a flexible, sunny hose-like material. Connecting members are attached to both ends of the hose to connect to the water injection confluence member 30 and the water supply equipment connecting pipe 12. Water is supplied into the siphon drain pipe 13 via the backflow prevention device 24 and the water injection confluence member 30 using the water supply equipment 20 connected to the water supply equipment connecting pipe 12. Once the siphon drain pipe 13 is full and water is flowing, the water supply equipment 20 is stopped to stop the water supply operation. When the flow from the water supply equipment 20 is stopped, the water in the backflow prevention device 24, which is made of a flexible material, tries to flow down to the upstream storage section along with the water in the water supply equipment connecting pipe 12. As a result, the backflow prevention device 24 becomes negatively pressurized and is blocked by atmospheric pressure. This action causes the water injected from the water supply equipment 20 to flow downstream from the top of the siphon drain pipe 13 towards the downstream discharge port due to its potential energy. This flow draws water from the storage area into the siphon intake pipe 11a at the upstream end. When this action is at work, if the water that has flowed into the intake confluence member 30 flows towards the backflow prevention device 24 connected to the other side, the water will return to the storage area. The backflow prevention device 24 was developed to prevent this. As a result, the water drawn in by the siphon does not change direction within the intake confluence member 30 and flows towards the backflow prevention device 24, but can instead flow towards the downstream discharge port 13a.

[0032] As shown in Figure 3, the water injection junction member 30 has a structure in which a water supply equipment water injection side pipe member 32 is attached to the side of a straight pipe-shaped siphon main pipe member 31 by joining them. When the side pipe member 32 for water supply equipment water injection is cut out to create a junction section on the side of the straight pipe-shaped siphon main pipe member 31, a junction section notch 33 is generated and attached to the junction with the water supply equipment water injection side pipe member 32 by a hinge or the like so that the opening on the side of the siphon main pipe member 31 can be opened and closed. The junction section notch 33 generated when the junction section of the siphon main pipe member 31 is cut out naturally has a shape that is almost identical to the shape of the opening of the junction section on the side of the siphon main pipe member 31. Therefore, by attaching this to the junction section via a hinge 34 as a switching valve 35 for the junction section, a switching valve 35 of an appropriate size that matches the shape of the opening of the junction section can be made. Furthermore, the switching valve 35 may be a newly fabricated piece rather than a reused piece cut from a straight pipe.

[0033] Thus, the water supply equipment side pipe member 32, which is equipped with a curved switching valve 35 via a hinge 34, is fixed and integrated with the siphon main pipe member 31 by welding or other means, facing the confluence.

[0034] The water injection junction member 30 thus manufactured functions in the siphon water supply device 200 as follows: When water supplied by the water supply equipment 20, such as a submersible pump, flows through the water supply equipment connecting pipe 12 and the backflow prevention device 24 to the water supply equipment water injection side pipe member 32, the switching valve 35, which is curved by the water supply force, opens to the inside of the siphon water intake side. This makes it possible to widen the water passage cross-section of the junction to be the same as the cross-section of the water supply equipment connecting pipe 12 and the backflow prevention device 24, thereby ensuring a water supply amount corresponding to the cross-section of the water supply equipment connecting pipe 12.

[0035] Subsequently, when the flow from the water supply equipment 20 is stopped, the flow from the water supply equipment connecting pipe 12 switches to the flow from the siphon suction pipe 11. As shown by the arrow in Figure 2, the switching valve 35 is pushed by the water flow of the siphon and closes the opening on the side pipe member 32 for water supply equipment injection at the confluence. When the switching valve 35 is pushed into the confluence of the side pipe member 32 for water supply equipment injection in this way, the uneven shape that could cause floating debris to get caught in the water drawn in from the siphon suction pipe 11 is eliminated. In addition, the flow becomes straight, so floating debris flows in from the siphon suction port 11a of the siphon suction pipe 11, passes through the inner surface of the siphon main pipe member 31 without getting caught, is swept through the siphon pipe member 10, and is eventually discharged from the discharge port 13a at the downstream end.

[0036] In conventional water injection confluence members, an uneven structure is formed inside the siphon-side water passage section. As a result, floating debris within the pipe member 10 can get caught on these uneven surfaces, eventually blocking the water passage section. However, by eliminating the uneven structure and making the flow straight, it is possible to reduce phenomena such as floating debris accumulating into clumps that block the water passage section, stopping the siphon water supply operation, or the siphon pipe member downstream of the blocked section being crushed by negative pressure.

[0037] As shown in Figure 4, the angle α° formed by the flanges on the backflow prevention device 24 side and the upstream end of the siphon suction pipe 11 side of the water injection confluence member 30 has an effect on the alignment of the connecting pipe members 10, but this does not directly relate to the switching function between water supply by the water supply equipment 20 and siphon suction, which is a major feature of this siphon water supply device 200, so we will explain this switching function. As shown in Figure 2, when the water flow from the backflow prevention device 24 side has spread throughout the entire pipe member 10 of the siphon and water is flowing, the water supply by the water supply equipment 20 is stopped, and water suction begins from the siphon suction port 11a located upstream of the siphon suction pipe 11 due to the siphon action. This suctioned water presses the switching valve 35 provided on the water injection confluence member 30 against the opening side of the water supply equipment water injection side pipe member 32, effectively sealing the opening completely. As a result of this phenomenon, water drawn in by the siphon action from the siphon's intake port 11a passes through the straight-pipe-shaped siphon main pipe member 31 of the water inlet confluence member 30 and flows into the downstream siphon drain pipe 13, where it is discharged from the discharge port 13a at the downstream end. Incidentally, to stop the siphon water supply operation, the siphon action can be stopped by opening the on / off valve of the air intake section 14 shown in Figure 1, which allows air to be drawn into the siphon drain pipe.

[0038] Furthermore, when the water supply equipment injection side pipe member 32 is joined to the straight pipe of the siphon main pipe member 31 and integrated, if a bend angle β° is provided in the middle of the water supply equipment injection side pipe member 32 as shown in Figure 4, then generally the water supply equipment injection side pipe member 32 is equipped with a flange at a 90° angle to the backflow prevention device 24, resulting in an α° angle with the flange provided on the siphon suction pipe 11. This phenomenon can be eliminated by making the β angle 90°, but bending at a 90° angle to the flow of water within the pipe member 10 creates resistance to the flow, causing a significant reduction in the flow velocity within the pipe member 10, which is undesirable. Therefore, as shown in Figures 1 and 4, the angle between the flanges provided on the backflow prevention device 24 side and the upstream end of the siphon suction pipe 11 constitutes an α° angle. In such cases, the siphon suction pipe 11 connected to the siphon suction port 11a side of the siphon main pipe member 31 can be installed on the same extension line as the straight pipe on the siphon suction port 11a side. However, the pipe member 10 connected to the upstream end of the water supply equipment connecting pipe 12 is installed at an angle of α° from the siphon suction pipe 11, requiring a larger installation space. In such cases, an additional processing cost is required to create a β° angle in the middle of the water supply equipment water injection side pipe member 32, which increases manufacturing costs.

[0039] Therefore, a straight pipe structure may be used, as shown in Figure 5 for the water supply equipment side pipe member 32 of the water injection confluence member 30. Alternatively, the flange on the first opening 37 side and the flange on the second opening 38 side may be placed in parallel, creating a structure that allows the backflow prevention device 24 and the siphon water intake pipe 11 to be connected side by side.

[0040] As shown in Figure 5, a standard, general-purpose flange can be used for the flange fixed to the second opening 38. The upstream end of the water supply equipment side pipe member 32 is cut at an angle, resulting in an elliptical opening 32a, and the cross-section of the backflow prevention device 24 is a circular opening 24a.

[0041] As shown in Figure 6, the structure is such that a water supply equipment water injection side pipe member 32 is joined to the side of a straight siphon main pipe member 31. An elliptical opening is provided on the side of the siphon main pipe member 31, with a width and length that matches the shape of the opening (junction) of the water supply equipment water injection side pipe member 32. As shown in Figure 7, this junction notch 33 has the shape of the opening of the water supply equipment water injection side pipe member 32, and can therefore be used as an elliptical switching valve 35. The end of the junction notch 33 is attached to the opening (junction) of the water supply equipment water injection side pipe member 32 via a hinge and used as a switching valve 35.

[0042] The switching valve 35 naturally has a curved cross-section, just like the siphon main pipe member 31. As a result, when siphon water is drawn in, the switching portion becomes part of the inner wall of the siphon water intake pipe, forming the water passage cross-section.

[0043] Figure 8A is a cross-sectional view showing the state in which pipe members 10, such as a siphon suction pipe 11 equipped with flanges, a backflow prevention device 24, or a water supply equipment connecting pipe 12, are connected to the first opening 37 and the second opening 38 of the water injection confluence member 30. A hinge 34 is attached to the end of the switching valve 35 and it is used as a switching valve 35 that is attached to the confluence of the straight siphon main pipe member 31 and the water supply equipment water injection side pipe member 32 to switch the direction of flow at the confluence of the straight siphon main pipe member 31 and the water supply equipment water injection side pipe member 32.

[0044] Figure 8B is an enlarged view of Figure 8A, and the BB section, CC section, and DD section represent the cross-sectional views of each section in Figure 8B. Figure 8C is an enlarged view of the CC section in Figure 8B. The general-purpose flange members connected to the first opening 37 and the second opening 38 have a circular opening 12b that is the same size as the cross-section of the second opening 38. By aligning the center of this circular opening 12b with the center of the opening 12a at the upstream end of the water supply equipment water injection side pipe member 32, which has an elliptical cut surface due to the end of the water supply equipment water injection side pipe member 32 being cut diagonally, the flange member and the opening 12a at the upstream end of the water supply equipment water injection side pipe member 32 are fixed together by welding or the like, without having to manufacture a flange member with a custom-made opening. As a result, the bolt holes in the flanges are in the same position on both sides, making connection easy, and allowing water to flow smoothly from the water supply equipment connection pipe 12 to the water supply equipment water injection side pipe member 32.

[0045] (Second Embodiment) Figure 9 shows an example of the connection of the water injection confluence member 30, which constitutes part of the siphon water supply device 200 according to the second embodiment. The water injection confluence member 30, which constitutes part of the siphon water supply device 200 according to the second embodiment, differs from the first embodiment in that it is connected directly to the water supply equipment 20, such as a submersible pump, or via a water supply equipment connection pipe, and is installed in the water together with the water supply equipment 20. Everything else is the same as the first embodiment, so the explanation is omitted.

[0046] The water inlet confluence member 30 is either directly connected to the discharge section 20a of the water supply equipment 20, or, as shown in Figure 9A, a short water supply equipment connecting pipe 12 is attached to the discharge section 20a of the water supply equipment 20 before the water inlet confluence member 30 is attached. In this way, by directly connecting the discharge section 20a of the water supply equipment 20 to the upstream opening of the water supply equipment water inlet side pipe member 32 of the water inlet confluence member 30, the water supply equipment connecting pipe 12 becomes unnecessary, or, if the discharge section 20a of the water supply equipment 20 is connected to the upstream opening of the water supply equipment water inlet side pipe member 32 via a short water supply equipment connecting pipe 12, the length of the water supply equipment connecting pipe 12 used becomes extremely short, which has the effect of reducing material costs. Furthermore, if the water depth in the storage section is deep enough to immerse the water supply equipment 20 and the water injection confluence member 30, they will be submerged in the water together with the water supply equipment 20. Therefore, even if the water injection confluence member 30 is manufactured with incomplete airtightness at the welded joints, it will be submerged in water and will draw in water rather than air through the weld gaps, thus having no effect on the siphon action and allowing the siphon action to continue. In addition, if part or all of the water supply equipment 20 and the water injection confluence member 30 are submerged in water, and there is no backflow prevention device 24 between the water supply equipment 20 and the upstream opening of the water supply equipment water injection side pipe member 32, when the siphon is started, the water supply operation will stop after water is injected from the water supply equipment 20 and switch to siphon water supply operation, but the water intake operation by siphon action from the water supply equipment 20 will continue in parallel thereafter. However, due to the narrow cross-sectional area of ​​the water passage in the water intake section of the water supply equipment 20, including the fine water intake strainer (hole) structure 20b and the internal motor structure, the amount of water drawn in by the siphon is small. Most of the water intake and supply work by the siphon action is performed by water drawn in from the siphon intake port 11a, passing through the straight siphon main trunk material 31 side of the water inlet confluence member 30, reaching the siphon drain pipe 13, flowing downstream, and being discharged from the discharge port 13a.

[0047] (Third embodiment) A water injection junction member according to the third embodiment is shown in Figure 10. The water injection junction member 30 according to the third embodiment is similar to that of the first embodiment in that, as shown in Figure 10, a water supply equipment water injection side pipe member 32 is attached to the side of a straight pipe-shaped siphon main pipe member 31. The water injection confluence member 30 according to the third embodiment is composed of a siphon intake side, which has an opening / closing device 40 at the upstream opening of one of the siphon main pipe members 31 and a water supply equipment water injection side, which has an opening / closing device 40 (Figures 10A and 10B) or a backflow prevention device 24 (Figures 10C and 10D) at the upstream opening of the other water supply equipment water injection side pipe member 32. When the opening / closing device 40 is provided at the upstream opening of the other water supply equipment water injection side pipe member 32, as shown in Figures 10A and 10B, when the siphon is started, the opening / closing device 40 on the water supply equipment water injection side is opened first, the opening / closing device 40 on the siphon intake side is closed, and water is injected from the water supply equipment 20. When drainage from the low-temperature area is confirmed, the switch 40 on the water supply equipment injection side is closed and the switch 40 on the siphon intake side is opened to start water supply by siphon. On the other hand, if a backflow prevention device 24 is provided at the upstream opening of the other water supply equipment injection side pipe member 32, as shown in Figures 10C and 10D, when starting the siphon, the switch 40 on the siphon intake side is first closed, and water from the water supply equipment 20 is injected from the water supply equipment injection side. When drainage from the low-temperature area is confirmed, the switch 40 on the siphon intake side is opened, closing the hose of the backflow prevention device 24. This starts water supply by siphon. Thus, according to the third embodiment, it is possible to omit the switching valve 35 (33) that switches the direction of flow, which is provided at the junction of the siphon main pipe member 31 and the water supply equipment injection side pipe member 22 shown in Figures 2 to 7. [Industrial applicability]

[0048] As shown in the embodiments described above, this device can be used to safely, inexpensively, and efficiently drain water from storage areas such as rivers, lakes, sediment dams, and glacial lakes. [Explanation of symbols]

[0049] 10...Pipe member, 11...Siphon water intake pipe, 11a...Siphon water intake port, 12...Water supply equipment connecting pipe, 12a, 12b...Opening, 13...Siphon drain pipe, 13a...Discharge port, 13b...Flow rate adjustment device, 13c...Discharge port air backflow prevention device, 14...Air intake section, 15...Basket, 16...Float, 20...Water supply equipment, 20a...Discharge section, 20b...Water intake strainer (hole) structure, 22...Generator, 24...Backflow prevention device, 24a...Opening, 30...Water injection confluence member, 31...Siphon main pipe member, 32...Side pipe member for water injection of water supply equipment, 32a...Oval-shaped opening, 33...Confluence notch, 34...Hinge, 35...Switching valve, 37...First opening, 38...Second opening, 39...Third opening, 40...Opening / closing device, 90...Storage section, 90a...Water level, 200...Siphon water supply device, 300...Conventional water injection confluence member, 400...Conventional siphon water supply device

Claims

1. In a water injection confluence member used in a siphon water supply system that moves water or water and sediment from a storage area located in a high-water level area to a low-lying area located below the high-water level area, The water injection junction member comprises a straight siphon main pipe member connected to a siphon suction pipe at its upstream opening and a siphon drain pipe having an air intake section at its downstream opening, and a water supply equipment water injection side pipe member attached to a junction opening provided on the side of the siphon main pipe member and connected to a water supply equipment connection pipe or backflow prevention device on its upstream side, and the overall shape forms a shape roughly resembling the Japanese katakana character "ト". A switching valve is provided via a hinge at the junction of the opening on the side of the siphon main pipe member and the water supply equipment water injection side pipe member, which switches between the water flow from the water supply equipment water injection side pipe member and the water flow from the siphon main pipe member. The switching valve is characterized by using a confluence section notch cut out when the opening is provided on the side surface of the siphon main pipe member.

2. The water inlet confluence member according to claim 1, characterized in that an opening / closing device is provided at the upstream opening of one of the siphon main pipe members that forms a bifurcated shape with the siphon main pipe member of the water inlet confluence member and the water supply equipment water inlet side pipe member, and an opening / closing device or backflow prevention device is provided at the upstream opening of the other water supply equipment water inlet side pipe member.

3. The water injection junction member according to claim 1 or 2, characterized in that the water injection side pipe member for the water supply equipment is formed in a bent shape.

4. The water injection junction member according to claim 1 or 2, characterized in that the water injection side pipe member for the water supply equipment is in a straight shape.

5. The water injection confluence member according to claim 4, characterized in that the upstream opening of the water supply equipment water injection side pipe member connected to the water supply equipment connecting pipe or the backflow prevention device and the upstream opening of the siphon main pipe member connected to the siphon water intake pipe are formed parallel to each other and facing the same direction.

6. The water inlet confluence member according to claim 5, characterized in that the upstream opening of the water supply equipment water inlet side pipe member connected to the water supply equipment connecting pipe or the backflow prevention device is formed in an elliptical shape, and a connecting fitting for a backflow prevention device having a circular opening is connected to the opening.

7. The water inlet confluence member according to Claim 6, A water injection confluence member characterized in that it is connected to the discharge section of a water supply device either directly or via a water supply device connecting pipe at the upstream opening of the water injection side pipe member of the water injection confluence member of the water supply device.

8. A siphon water supply method characterized by using a siphon water supply device that uses the water injection confluence member described in claim 1.

9. A siphon water supply method characterized by using a siphon water supply device which is connected to the discharge section of a water supply device either directly or via a water supply device connecting pipe at the upstream opening of the water supply device water supply side pipe member of the water supply confluence member described in Claim 2.

10. A siphon water supply method characterized by using a siphon water supply device which is connected to the discharge section of a water supply device either directly or via a water supply device connecting pipe at the upstream opening of the water supply device water supply side pipe member of the water supply confluence member described in Claim 4.

11. A siphon water supply method characterized by using a siphon water supply device which is connected to the discharge section of a water supply device either directly or via a water supply device connecting pipe at the upstream opening of the water supply device water supply side pipe member of the water supply confluence member described in Claim 5.

12. A siphon water supply method characterized by using a siphon water supply device that uses a water supply confluence member described in Claim 3, wherein an opening and closing device is provided at the upstream opening of one of the siphon main pipe members that forms a bifurcated shape with the siphon main pipe member and the water supply equipment water supply side pipe member, and an opening and closing device or backflow prevention device is provided at the upstream opening of the other water supply equipment water supply side pipe member, and a switching valve for switching the direction of flow provided at the confluence of the siphon main pipe member and the water supply equipment water supply side pipe member is omitted.

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