Siphon water supply device including air suction part and siphon water supply method using siphon water supply device

Abstract

To provide a siphon water supply device including an air suction part which allows outside air to flow according to a degree of increase, even though a negative pressure in a siphon pipe (pipe member) increases, and accordingly can prevent blocking of the pipe member.SOLUTION: There are provided a siphon water supply device and a siphon water supply method, wherein an air suction member 100 constituted on a portion of a siphon water supply device is provided on a portion of a pipe member 10 constituting the siphon water supply device 200, a suction hole 130 of an air suction part 110 allows outside air to automatically flow into the pipe member 10 according to an increase amount of a negative pressure inside the pipe member 10 by siphon action, and alleviates the negative pressure in the pipe member 10 so as not to apply a negative pressure enough to block the pipe member 10 thereto and prevents blocking of the pipe member 10.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an air intake part having a function of preventing blockage (collapse) of a pipe member due to negative pressure inside the pipe member used in a siphon water supply device for supplying water or water and sediment in a high water area to a low area, a siphon water supply amount adjustment function, and a siphon action stop function, a siphon water supply device provided with this air intake part, and a water supply method using this siphon water supply device.

Background Art

[0002] Conventionally, as a method of supplying water from a flooded area such as a pond, marsh, river, pool, dam, etc., there is a method of supplying water using a water supply device such as a submersible pump. This is a drainage method in which a water supply device is immersed in a flooded area of a high water area, pipe members such as a suction hose and a sunny hose are piped upward toward the inner surface of a dike such as a temporary cut or an embankment or the top end of a wall surface, and a discharge port is arranged outside the temporary cut dike or structure beyond the top end for drainage, and the water is allowed to flow down naturally from there. However, the submersible pump water supply method involves consumption of electricity and fuel, resulting in an increase in cost.

[0003] Therefore, the applicant of the present application has developed a water supply device that utilizes the action of a siphon without consuming electricity or fuel. However, regarding the piping of the pipe member for siphon water supply, there is no problem when piping it in a flat shape on the ground. However, in the water-filled part where the siphon sucks water at the upstream part, for example, when constructing a scaffold with a single-pipe or the like and piping over the top of the dam from the water surface to the top of the pipe, there are cases where the pipe member is placed on the single-pipe and piped. When the pipe member is placed on the single-pipe for piping, the support of the weight of the pipe member is concentrated at a single point on the single-pipe. When water is passed through the pipe member in such a state, the weight of the water in the pipe member is collected at a single point on the single-pipe, so a phenomenon occurs where the pipe member collapses and blocks as if it breaks from that part. Also, when performing siphon water supply work, a phenomenon occurs where dust such as wood chips and withered leaves that has flowed out around the dust-proof cage provided at the siphon water intake immersed in the upstream water-filled part covers and seals the dust-proof cage. A phenomenon also occurs where the dust is sucked onto the siphon water intake together with the wire mesh of the dust-proof cage due to the suction force of the siphon, causing the water intake to become blocked. That is, the siphon hose of the pipe member collapses because water is not continuously supplied into the pipe member due to siphon water intake. Also, the action of the siphon depends on numerical values such as the extension of the pipe material from the siphon water intake side to the top of the pipe, the extension of the pipe material from the top of the pipe to the siphon drainage side, the height of the lift over the top of the pipe from the water surface, and the water head difference, which is the elevation difference between the upstream water surface and the discharge port of the drainage. The amount of drainage fluctuates depending on the magnitude of these numerical values. When installing the piping for siphon water supply, even when the extension of the piping, especially when the lift does not exceed 7m, or when the water head difference is too large, exceeding 14m based on past performance, a large negative pressure is generated in the pipe material, causing a large negative pressure that crushes and blocks the pipe material. Therefore, there was no choice but to change the piping conditions, such as performing the operation of lifting the discharge port using a crane to reduce the water head difference and relieve the negative pressure in the pipe material. This method could be applied when there was no significant fluctuation in the water level of the upstream water-filled part. However, when the water level of the water-filled part fluctuates greatly, it was necessary to move the height of the discharge port each time to adjust the water head difference appropriately so that the negative pressure in the pipe member does not become too large.In addition, the siphon function causes the water delivery volume to vary depending on the extension of the pipe member on the water absorption side, the extension of the pipe member on the downstream side, the magnitude of the head between the water level in the water filling section and the top of the pipe, and the numerical value of the height difference (head difference) between the water level in the water filling section and the downstream discharge port. Since theoretical calculations can be performed to show that the negative pressure phenomenon in the pipe member becomes too large even before the siphon starts due to piping conditions affected by the terrain, methods such as lifting the discharge port with a wire or the like to increase the elevation and reduce the head difference from the water level in the water filling section have been attempted. However, frequently moving the elevation of the discharge port along with the water level fluctuations in the water filling section involves the use of a crane or the like, resulting in costs and becoming a troublesome issue.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Therefore, in order to solve the above-described problems, the present inventors have devised an air intake member that combines a pipe blockage prevention function for preventing blockage (collapse) of the pipe member, a siphon water delivery volume adjustment function, and a siphon action stop function. The present invention is a siphon water delivery device having an air intake member that adjusts the amount of air intake by adjusting the size of the intake hole of the air intake section and injecting air into the pipe member of the siphon device, thereby reducing the negative pressure in the pipe member that may be affected by large negative pressure in the pipe member due to poor piping conditions such as too large a head difference and may collapse, and a water delivery method using the same. The air intake section of the intake hole has a pipe blockage prevention function, a siphon water delivery volume adjustment function, and a siphon stop function that can prevent adverse effects of piping conditions such as too large a head difference by adjusting the opening size using a ball valve or the like and changing the amount of air intake. An object of the present invention is to provide a siphon water delivery device provided with an air intake member, and a siphon water delivery method using the siphon water delivery device provided with this air intake member.

Means for Solving the Problems

[0006] To achieve the above main object, the present invention adopts the following means.

[0007] An air intake member having a tube blockage prevention function, a siphon water delivery amount adjustment function, and a siphon action stop function for preventing blockage (collapse) of a tube member according to the present invention is provided as a part of the tube member constituting the siphon water delivery device. Even when a large negative pressure that causes the tube member to block is applied due to an increase in the negative pressure inside the tube member caused by changes in the siphon piping conditions or the water level in the flooded area, the size of the intake hole of the air intake part is opened in advance or according to the situation so as not to exceed a predetermined negative pressure, and outside air is inhaled into the tube member, thereby reducing the influence of the large negative pressure and preventing the tube member from collapsing. When stopping the siphon action, the air intake part of the air intake member can be opened wide to inhale a large amount of air and stop the siphon action. For example, after maintaining the siphon action with a 5 mm opening in a 50 mm diameter intake hole, the intake hole is fully opened to stop the siphon, and then returned to the position opened to 5 mm. Experiments have also confirmed that when starting the siphon again, the siphon action can be started by operating the water delivery device with the intake hole opened to 5 mm. Of course, the opened width of 5 mm is only an example, and the opening ratio can be appropriately selected.

[0008] When the head is 7 m or more due to terrain or other reasons, the water supply operation will be carried out by using a submersible pump and a siphon water supply in combination. Instead of starting the submersible pump water supply with the air intake part of the air intake member provided for siphon stop in the closed state as in the prior art, the submersible pump water supply is started with the intake hole open. When water starts to flow out from the siphon discharge port with the start of the submersible pump water supply, it serves as a criterion for starting the siphon action, so an operation is performed to gradually reduce the opening area of the air intake part of the air intake member. As a result, the siphon action can be gradually increased, and by performing an operation to gradually increase the opening area of the intake part, the siphon water supply volume decreases, so the overall water supply volume can be reduced. While visually observing the clogging condition of the pipe member with the naked eye, or by attaching a flow meter or a barometer to the siphon water supply device, an operation is performed to gradually open and close the air intake part of the air intake member, so that it is possible to prevent the negative pressure in the pipe member from becoming too large and the pipe member from collapsing. By operating the combined operation of the submersible pump and the siphon with the intake hole in the open state, the problem can be solved. Also, even when the head is less than 7 m, when the water head difference is 14 m or more, the siphon start operation is performed in the same manner as when the head is 7 m or more when starting the siphon. The submersible pump is operated with the intake hole open to start the siphon action, and after startup, the submersible pump can be stopped and the water supply operation can be performed only by the siphon action. Even if the siphon water intake on the upstream side is clogged with dust or the like at the time of siphon startup and the negative pressure in the pipe member increases significantly, an excessive increase in negative pressure can be prevented by inhaling an amount of outside air proportional to it from the intake hole, and clogging (collapse) of the pipe member can be prevented in advance.

[0009] Furthermore, the shape of the air intake part may be characterized by being circular or elliptical.

[0010] Furthermore, by making the shape of the air intake part square or rectangular, it may be characterized in that it becomes easier to obtain the ratio of the opening state with respect to the 100% fully open opening state. When the shape of the air intake part is circular or elliptical, the shape of the intake hole changes between a crescent shape and a full moon shape by the operation of the handle, but it is difficult to obtain the numerical value of what percentage of the opening area with respect to the 100% fully open state. Therefore, by making the shape of the intake hole of the air intake part according to the present invention square or rectangular, the numerical value indicating what percentage of the opening area state with respect to the fully open state can be easily obtained visually.

[0011] An air intake member having a tube blockage prevention function, a siphon water delivery amount adjustment function, and a siphon stop function for preventing blockage (collapse) of the tube member is provided with a connecting flange. Therefore, by attaching the air intake member itself to the tube member, it can be easily attached to a part of the siphon water delivery device, the siphon water delivery amount can be increased or decreased, and damage to the tube member can be prevented.

[0012] By adopting such a configuration, it is possible to easily prevent blockage (collapse) of the tube member, enable adjustment of the siphon water delivery amount, and produce an air intake part having a siphon stop function, effectively preventing collapse of the tube member and utilizing the siphon water delivery operation.

[0013] Further, the siphon water delivery device according to the present invention is a siphon water delivery device provided with an air intake part having a tube blockage prevention function, a siphon water delivery amount adjustment function, and a siphon stop function for preventing blockage (collapse) of the tube member described above.

[0014] Thereby, it is possible to provide a siphon water delivery device capable of adjusting the water delivery amount of a water delivery operation utilizing the siphon action in a siphon single water delivery operation and a water delivery operation using a combination of a siphon water delivery operation and an underwater pump water delivery operation, and reducing damage to the tube member due to negative pressure.

[0015] Furthermore, according to the water supply method using a siphon water supply device configured with an air intake unit having a tube blockage prevention function, a siphon water volume adjustment function, and a siphon stop function for preventing blockage (collapse) of the tube member according to the present invention, it is possible to provide a siphon water supply method using a siphon water supply device that can reduce the damage to the tube member caused by the negative pressure generated in the tube member due to the unreasonable piping of the tube member due to terrain or the like.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0017] Hereinafter, the siphon water supply device 200 using the air intake member 100 according to the present invention and the water supply method using the siphon water supply device 200 will be described in detail with reference to the drawings. Note that the embodiments and drawings described below are examples of a part of the embodiments of the present invention and are not used for the purpose of limiting to these configurations.

[0018] (First Embodiment) First, the siphon water supply device 200 provided with the air intake member 100 according to the present invention will be described with reference to the drawings. The siphon water supply device 200 according to the first embodiment is shown in FIG. 1. FIG. 1 is a diagram showing an outline of the configuration of the siphon water supply device 200 using the air intake member 100 having the air intake portion 110 according to the first embodiment.

[0019] As shown in Fig. 1, the siphon water supply device 200 according to the first embodiment is used when starting the siphon in the case where the siphon lift is 7 m or less, and when the lift is 7 m or more, it is used in combination with the siphon at the time of starting the siphon and thereafter to perform water supply work. Water supply equipment 20 such as a submersible pump, a siphon suction pipe 11 that performs a suction operation by the siphon action after the siphon is started, and a dust-proof cage 15 that surrounds the periphery of the outer circumference of the siphon suction port 11a of the siphon suction pipe 11 so that floating substances larger than the suction port are not sucked into the siphon suction pipe 11. The water supply equipment 20 is independently connected to one of the bifurcated shapes of the water injection confluence member 30 that sends the water merged from each of them in the downstream direction to the pipe member 10 in the downstream direction when performing the water supply work by the single water supply of the water supply equipment 20 or the single siphon water supply, or when using the water supply equipment 20 and the siphon water supply action in combination, and the siphon suction pipe 11 is connected to the other. The pipe member 10 through which the water supply equipment 20 or the siphon suction pipe 11 and the water sent from both of them passes continues in the downstream direction, and an air intake member 100 is connected to the top α of the pipe of the pipe member 10 and its periphery. Water passes through the inside to which the pipe member 10 is connected and discharges at the most downstream part of the pipe to form a discharge port 11. The discharge port 11 is provided with an air backflow prevention member 12 made of a flexible material to perform a function of preventing air from flowing back from the discharge port 11 into the siphon water supply device 200 and stopping the siphon action. Note that in Fig. 1, the shape of the water injection confluence member 30 forms a "Y-shaped" shape, and a figure is drawn in which the upstream side has a bifurcated structure and the water supply equipment 20 is connected to one side and the siphon suction pipe 11 is connected to the other side. However, the water injection confluence member is not limited to this shape. It can be a water injection confluence member in the shape of a katakana "ト" character, with the vertical part as the siphon suction pipe 11 and the water supply equipment 20 connected to the pipe protruding obliquely on the side, or a water injection confluence member with a straight tubular upstream side to which the water supply equipment 20 is connected, and a siphon suction port provided on the side of the straight pipe, and the suction port is opened and closed by a check valve.

[0020] The air intake member 100 includes a main body water passage portion 150, an air intake portion 110 provided in the main body water passage portion 150, and connection flanges 105 provided at both ends of the main body water passage portion 150. The air intake portion 110 includes an opening and closing member 118 capable of adjusting the size of the intake hole 130. The opening and closing member 118 can adjust the intake hole 130 to an arbitrary opening ratio by means of a handle 115.

[0021] The air intake member 100 configured to be connected to the top or the vicinity thereof of the pipe of the siphon water supply device 200 according to the first embodiment has an outer peripheral shape of the air intake portion 110 that is circular or elliptical as shown in FIG. 2. This is because it is made easy to obtain by using a general-purpose ball valve 118. However, since the opening shape of the ball valve 118, which is an opening and closing member, is also circular with respect to the circular (including elliptical) outer periphery, when the handle 115 is operated to rotate the ball valve 118, the intake hole 130 changes from a crescent shape to a full moon shape. For this reason, even when the open area of the air intake hole 130 is about to open to 50% with the full moon as 100%, it is difficult to visually estimate the (area) standard.

[0022] In the second embodiment, as shown in FIGS. 3B and 3C of FIG. 3, a vertically long shape, a substantially square shape, or a substantially rectangular shape is adopted in which two sides opposite to the shape of the air intake portion 110 are parallel. In the second embodiment, when the handle 115 is operated to rotate the ball valve of the opening / closing member 118 to change the shape of the intake hole 130, since the shape of the air intake portion 110 is a substantially square shape or a substantially rectangular shape, when determining the opening size of the intake hole 130, it becomes easier to obtain the opening ratio of the intake hole 130 with respect to the case of being fully opened by 100% by visual measurement. For example, if the opening ratio is set to 50% with respect to 100% full opening, by aligning the tip of the opening of the ball valve of the opening / closing member with the half position of the opening of the air intake portion 110, an approximate ratio can be obtained, and an arbitrary water delivery amount can be ensured. Even if the area is 30% of the full opening area, by operating the handle 115 and aligning the tip of the opening of the ball valve of the opening / closing member 118 with the one-third position of the opening by visual measurement, an arbitrary water delivery amount can be generally achieved, and the work has become a much simpler operation.

[0023] For the siphon water supply device 200 configured as described above, the basic installation method and usage method will be described. Regarding the installation method, the configuration diagrams of the siphon water supply devices 200 in the first and second embodiments are shown in FIG. 1. The characteristic of the air intake part 110 configured in the first embodiment is that the siphon water supply device 200 has an outer periphery of an opening and closing port that is circular or elliptical. The air intake part 110 of the second embodiment is a siphon water supply device 200 characterized in that the shape of the air intake part 110 is generally square or generally rectangular as shown in FIGS. 3B and 3C of FIG. 3. Since the other configurations are the same for both, the basic installation method and usage method of the first and second embodiments will be described together. The siphon water supply device 200 mainly has a function of preventing pipe blockage, a function of adjusting the siphon water supply volume, and a function of stopping the siphon, and shows a siphon water supply device 200 in which an air intake member 100 having a connecting flange 105 is connected to the main body water passage part 150 by the connecting flange 105 and integrated with the pipe member 10. The water supply device 20 such as a submersible pump is mainly used when starting the siphon when the siphon lift is 7 m or less, and when the lift is more than 7 m, the water supply operation is performed in combination with the siphon water supply operation both when starting the siphon and after starting the siphon. The water supply device 20 such as a submersible pump, the siphon suction pipe 11 that performs the water suction operation by the siphon action after starting the siphon, and the dustproof cage 15 that surrounds the periphery of the outer circumference of the siphon suction port 11a of the siphon suction pipe 11 so that floating substances larger than the opening shape of the siphon suction port 11a do not adsorb to the siphon suction port 11a. When performing the water supply operation by the water supply device 20 alone or the siphon alone, or when using the water supply device 20 and the siphon water supply action in combination, the water flows from each are joined together and sent in the direction of the pipe member 10 in the downstream direction. The water supply device 20 and the siphon suction pipe 11 are respectively connected to one of the bifurcated shapes of the water injection confluence member 30. The pipe member 10 through which the water sent from the water supply device 20 or the siphon suction pipe 11 passes continues in the downstream direction, and the air intake member 100 is connected to the top and its periphery of the piping of the pipe member 10.Water passes through the main body water passage portion 150 to which the pipe member 10 is connected and discharges at the most downstream portion of the pipe to form the discharge port 10b. The discharge port 10b is provided with an air backflow prevention member 12 made of a flexible material, which functions to prevent air from flowing back from the discharge port 10b and entering the pipe member 10 that constitutes the siphon water supply device 200, so as not to stop the siphon action.

[0024] The usage method will be described. Regarding the usage method of the siphon water supply device 200, since the usage method differs depending on whether the siphon lift is below or above the limit lift of 7 m, first, the case where the lift is 7 m or less will be described. After arranging the siphon water supply device 200 and a power source such as a generator, turn on the power of the water supply device 20 such as a submersible pump to operate the water supply device 20 and inject water into the pipe member 10 etc. of the siphon water supply device 200. Eventually, when the inside of the pipe member 10 of the siphon water supply device 200 becomes full of water and starts to flow, and taking as a criterion that the water bubbles from the discharge port 10b at the downstream end flow without being mixed with white bubbles, when the power of the submersible pump is stopped, due to the function of switching the flow from the water supply device 20 connected to one of the bifurcations of the injection confluence member 30 to the flow of water by the siphon action sucked from the siphon water inlet 11a of the siphon water suction pipe 11 connected to the other of the bifurcations, the water supply operation by the water supply device 20 such as a submersible pump alone is switched to the water supply operation by the siphon action alone, and the water supply operation can be continued without consuming fuel or electricity. As a usage method that demonstrates the function of the air intake part 110 at this time, as described above, when the surface of the dustproof cage 15 covering the outer periphery of the siphon water inlet 11a is clogged and covered by pieces of wood or withered leaves flowing out, a phenomenon occurs where the dustproof cage 15 is crushed by the suction force from the siphon water inlet 11a. When such a phenomenon occurs, the siphon water inlet 11a is blocked by dust and the siphon water suction operation stops functioning. The water on the downstream side from the top of the pipe in the siphon water supply device 200 tries to flow downstream towards the discharge port on the downstream side due to the potential energy, but since the siphon water suction function stops and water is not supplied from the upstream, a huge negative pressure is generated in the siphon water supply device 200 including the inside of the pipe member 10, and the pipe member 10 that cannot withstand the huge negative pressure will be blocked and damaged. The air intake part 110 assumes that the siphon action may generate a huge negative pressure in the pipe member 10 and block and damage the pipe member 10, and operates the handle 115 of the air intake part 110 to rotate the ball valve of the opening and closing member 118 to open the intake hole 130 to an arbitrary size and allow air to flow in constantly. If the amount of air flowing in from the intake hole 130 is small, the siphon water supply volume will decrease slightly, and if the amount of air flowing in from the intake hole 130 increases, the siphon water supply volume will decrease significantly.Since the water delivery rate required by the siphon water delivery at the site can be measured by a flow measurement device, when adjusting the opening size of the suction hole 130 by operating the handle 115 of the air suction unit 110 to rotate the ball valve of the opening and closing member 118, the water delivery rate is confirmed by the flow meter, and the operation of the handle 115 is stopped within the range of the required water delivery rate while adjusting the suction hole 130 of the air suction unit 110. By constantly allowing air to flow in, in the unlikely event that the siphon water suction port 11a is blocked by dust and the siphon water suction operation fails, and a huge negative pressure is generated in the pipe member 10 of the siphon water delivery device 200, the air constantly flowing in from the air suction unit 110 increases in inflow volume along with the increase in negative pressure, so it is possible to maintain an air pressure phenomenon where the inside of the pipe member 10 does not reach a huge negative pressure. Also, when the water level in the upstream flooding section rises due to rainfall or the like, and the elevation difference (water head difference) between the water surface elevation and the downstream siphon discharge port becomes large, the negative pressure in the pipe member 10 of the siphon water delivery device 200 will increase. Therefore, assuming this water head difference fluctuation phenomenon as well, the handle 115 of the air suction unit 110 is operated to rotate the ball valve of the opening and closing member 118 to adjust the size of the suction hole 130 of the air suction unit 110, and an arbitrary amount of air is constantly allowed to flow into the siphon water delivery device 200. Thus, even during a rapid increase in negative pressure, the amount of air sucked in increases according to the magnitude of the increasing negative pressure, reducing the increase in negative pressure in the pipe member 10 and preventing the blockage and collapse of the pipe member 10. To repeat, due to the function of automatically allowing outside air to flow into the pipe member 10 from the air suction unit 130 according to the suction force corresponding to the change in negative pressure in response to the change in negative pressure in the pipe member 10, as the water level 90a in the flooding section 90 drops and the water head difference from the discharge port 10b becomes smaller and the negative pressure eases, the amount of outside air sucked into the pipe member 10 decreases, increasing the siphon water delivery function. When the water level 90a in the flooding section 90 rises due to rainfall or the like and the water head difference becomes large, the negative pressure in the pipe member 10 becomes large. Therefore, the amount of outside air sucked into the pipe member 10 increases in response to this change, preventing the increase in negative pressure in the pipe member 10 and making it possible to prevent the pipe member 10 from being blocked. This is the siphon water delivery device 200 and the water delivery method.

[0025] Next, the method of using this siphon water supply device when the lift is 7 m or more will be described. When the lift is 7 m or more, since the limit lift of the siphon is exceeded, the water supply device 20 such as a submersible pump also performs combined water supply operations during the startup of the siphon and during operation after the siphon is started. However, when performing the water supply operation by combining the water supply device 20 and the siphon water supply action, according to the actual construction results, the water supply volume increases to about twice the water supply volume in the case of the water supply device 20 alone such as a submersible pump. Therefore, there is an advantage that the operating costs of temporary water supply facilities such as the number of installed water supply devices 20 and the number of operating generators, and the fuel consumption cost are reduced by about half. Also in this case, by operating the handle 115 of the air intake part 110 to rotate the ball valve of the opening / closing member 118 and adjusting the opening area of the intake hole 130 of the air intake part 110, similar to the case of the siphon water supply device 200 when the lift is 7 m or less, it is possible to prevent the negative pressure in the pipe member 10 from increasing to a negative pressure that may lead to damage of the pipe member 10 due to blockage by dust at the upstream siphon water intake 11a. Further, similar to the case when the lift is 7 m or less, when the water level of the upstream flooded part rises due to rainfall or the like and the elevation difference (water head difference) between the water surface elevation and the downstream siphon discharge port 10b increases, the negative pressure in the pipe member 10 of the siphon water supply device 200 increases. Therefore, assuming this fluctuation phenomenon of the water head difference as well, by operating the handle 115 of the air intake part 110 to rotate the ball valve of the opening / closing member and adjusting the size of the intake hole 113 of the air intake part 110 to an arbitrary size, an arbitrary amount of air can be constantly introduced into the siphon water supply device 200. Since the amount of air sucked in also increases according to the increase in the negative pressure when the negative pressure increases rapidly, it is possible to reduce the increase in the negative pressure in the pipe member 10 and prevent blockage and collapse of the pipe member 10.

[0026] When water passes through the pipe member 10, the weight of the pipe member 10 increases. In the case where one point of the pipe member 10 is supported like a single - pipe, etc., due to the increase in weight caused by water flow, the pipe member 10 may break and become blocked at the support part. When the pipe member 10 is blocked and the water - passing cross - section is cut off and water stops flowing, the water in the pipe member 10 piped from the pipe top to the downstream side tries to move downstream due to potential energy. However, since water cannot pass through the broken part of the single - pipe, a negative pressure increases from the broken part towards the downstream part of the pipe top. When this negative pressure exceeds the strength range of the pipe member 10, the phenomenon that the pipe member 10 is blocked over a long range can be similarly prevented.

[0027] In the present invention, an air - intake member 100 is provided by connecting a part of the pipe member 10 to the pipe top and its vicinity of the pipes constituting the siphon water - supply device 200, and an air - intake part 110 is formed. Before the pipe member 10 constituting the siphon water - supply device 200 is blocked due to an increase in negative pressure, the air - intake part 110 automatically increases the air inflow amount due to the influence of the increase in negative pressure in the siphon water - supply device 200 from the intake hole 130 of the air - intake part 110, so as to prevent the siphon pipe member 10 from being blocked in advance.

[0028] For example, as shown in FIGS. 2 and 3, the air - intake part 110 can adjust the size of the intake hole 130 of the air - intake part 110 to an arbitrary size by operating the handle 115 of the air - intake part 110 to rotate the ball valve of the opening - closing member 118. By doing so, since the suction force is affected by the change from the normal negative pressure and the air inflow amount from the intake hole 130 also changes, the difference between the negative pressure in the pipe member 10 and the atmospheric pressure is reduced, the external pressure applied to the pipe member 10 from the outside is reduced, and it is possible to prevent the pipe member 10 from being crushed and damaged.

[0029] As shown in FIG. 1, the air intake member 100 may be connected and attached to the top and near the top of the pipe of the siphon water supply device 200 to the pipe member 10. Connecting flanges 105 that can be attached to the connecting flange 105 provided at the end of the pipe member 10 with bolts and nuts are provided at both ends.

[0030] The suction holes 130 of the air intake part 110 described above allow air to flow into the pipe member 10 from the suction holes 130 of the air intake part 110 that are opened to an arbitrary size due to a change in the predetermined negative pressure inside the pipe member 10, thereby preventing a negative pressure that would cause the pipe member 10 to collapse from occurring inside the pipe member 10 and preventing damage to the pipe member 10.

[0031] Also, by attaching a negative pressure gauge to a pipe material or the like and measuring the negative pressure inside the pipe material, and gradually opening and closing the opening and closing part of the suction hole 130 of the air intake part 110 for adjusting the siphon water supply amount, it is possible to prevent the negative pressure inside the pipe material from becoming too large and causing the pipe material to collapse.

[0032] Note that the present invention is not limited to the above-described embodiments in any way, and can be implemented in various modes as long as it belongs to the technical scope of the present invention.

Industrial Applicability

[0033] As shown in the above-described embodiments, it can be used as a device for safely, inexpensively, and efficiently supplying water from a flooded area such as a pond, marsh, river, pool, or dam, and also as a device that can prevent damage to the device itself.

Explanation of Reference Numerals

[0034] 10... pipe member, 10b... siphon discharge port, 11... siphon suction pipe, 11a... siphon suction port, 12... air backflow prevention member, 15... dust cage, 20... water supply equipment, 30... injection confluence member, 90... flooded area, 90a... flooded area water level, 100... air intake member, 105... connecting flange, 110... air intake part, 115... handle, 118... opening and closing member, 130... suction hole, 150... main body water passage part, 200... siphon water supply device

Claims

1. It comprises a main body water passage part, an air intake part provided in the main body water passage part, and connecting flanges provided at both ends of the main body water passage part, and an air intake member connected to the connecting flange as a part of the siphon water supply device. In the siphon water supply device, The air intake part is characterized by including an opening and closing member capable of adjusting the size of the intake hole.

2. Before a large negative pressure that can crush the pipe member is applied to the pipe member due to the water level in the flooded part rising due to blockage of the siphon water intake or rainfall, etc., resulting in a large water head difference between the discharge port, the air intake part automatically allows outside air to flow into the inside of the pipe member along with the suction force corresponding to the increase in negative pressure from the air intake part under the influence of the negative pressure in the pipe member, thereby preventing the increase in negative pressure in the pipe member and preventing the pipe member from being blocked. The intake hole is opened to an arbitrary size before or after the siphon starts, so as to be able to respond to the change in negative pressure inside the siphon water supply device, and is sucked by the negative pressure in the siphon water supply device, constantly sucking outside air into the siphon water supply device. The siphon water supply device according to Claim 1, characterized in that.

3. The shape of the air intake part is circular or elliptical. The siphon water supply device according to Claim 2, characterized in that.

4. The shape of the air intake part is a vertically long shape or a quadrilateral with two opposite sides parallel. The siphon water supply device according to Claim 2, characterized in that.

5. A siphon water supply method characterized by using the siphon device according to any one of Claims 1 to 4.

6. In the siphon water supply method using the siphon device according to any one of Claims 1 to 4, Start water supply into the siphon water supply device with a water supply device while keeping the suction holes of the air intake part appropriately open according to the on-site terrain conditions, etc. When water starts to flow out from the siphon discharge port, perform an operation of gradually adjusting the area of the suction holes of the air intake part, thereby adjusting the siphon water supply volume to an appropriate amount to start the siphon. A siphon water supply method characterized by this.

7. In a siphon water supply method using the siphon device according to any one of Claims 1 to 4, Before starting the siphon water supply operation or after starting the siphon, adjust the opening area of the suction holes according to the water supply volume so that the suction holes can respond to the change in negative pressure inside the siphon water supply device, and start the siphon water supply operation in a state where it is appropriately open. By continuously allowing outside air to flow into the siphon water supply device at all times, it is sucked by the negative pressure inside the siphon water supply device, and outside air continuously flows into the siphon water supply device at all times. Before a large negative pressure that can crush the pipe member occurs due to the blockage of the siphon water intake or the rise in the water level of the flooded area due to rainfall, etc., causing the water head difference with the discharge port to increase, the negative pressure change inside the pipe member causes the outside air to automatically flow into the pipe member along with the suction force corresponding to the negative pressure change from the air intake part, thereby preventing the negative pressure from increasing inside the pipe member and preventing the pipe member from being blocked. As the water level of the flooded area drops, the water head difference with the discharge port decreases, and the negative pressure relaxes, the amount of outside air inhaled into the pipe member decreases, and the siphon water supply function increases. A siphon water supply method characterized by this.

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