Siphon water supply device with air intake section and siphon water supply method using this siphon water supply device

Abstract

To provide a siphon water supply device having an air intake section that can prevent the pipe section from becoming clogged by allowing outside air to flow in according to the degree of negative pressure increase inside the siphon pipe (pipe member) even if the negative pressure increases. [Solution] The air intake member 100 which constitutes part of the siphon water supply device of the present application is provided on part of a pipe member 10 which constitutes a siphon water supply device 200, and the intake hole 130 of the air intake part 110 automatically allows outside air to flow into the inside of the pipe member 10 in accordance with the increase in negative pressure inside the pipe member 10 due to the siphon action, thereby relieving the negative pressure inside the pipe member 10 so that the negative pressure is not large enough to cause the pipe member 10 to become clogged, thereby preventing the pipe member 10 from becoming clogged. A siphon water supply device and a siphon water supply method are provided which are characterized in that the air intake member 10 is provided on part of a pipe member 10 which constitutes a siphon water supply device 200, and the intake hole 130 of the air intake part 110 automatically allows outside air to flow into the inside of the pipe member 10 in accordance with the increase in negative pressure inside the pipe member 10 due to the siphon action, thereby preventing the pipe member 10 from becoming clogged.

Description

[Technical field]

[0001] The present invention relates to an air intake section that combines a function to prevent blockage (collapse) of a pipe member used in a siphon water supply device that supplies water in a high water area or water and sediment to a low water area due to negative pressure inside the pipe member, a function to adjust the amount of water supplied by the siphon, and a function to stop the siphon action, a siphon water supply device equipped with this air intake section, and a water supply method using this siphon water supply device. [Background technology]

[0002] Conventionally, one method for pumping water from the flooded areas of ponds, swamps, rivers, pools, dams, etc. is to use water pumping equipment such as submersible pumps. This is a drainage method in which the water pumping equipment is immersed in the flooded areas of high water levels, and pipes such as suction hoses or sunny hoses are piped upward toward the top of the inner surface or wall of a temporary cofferdam or embankment, and the water is drained beyond the top by an outlet placed on the outside of the temporary cofferdam or structure, from which it is allowed to flow naturally. However, the submersible pump water pumping method requires electricity and fuel consumption, which increases costs.

[0003] Therefore, the applicant of the present application developed a water supply device that uses the siphon action without consuming electricity or fuel. However, there is no problem with the piping of the siphon water supply pipe member when it is piped on a flat shape on the ground, but in the upstream water-pouring area where the siphon water is sucked in, a scaffolding is set up with single pipes, etc., and the piping may be done by climbing over the top of a dam, etc., which is the top of the pipe, from the water surface. When the pipe member is placed on the single pipe and piped, the support of the weight of the pipe member is concentrated at one point of the single pipe. When water is passed through the pipe member in this state, the weight of the water in the pipe member is collected at one point on the single pipe, and the pipe member is crushed and closed at that point. In addition, when performing the siphon water supply operation, dust such as wood chips and dead leaves that flowed out around the dustproof basket equipped at the siphon water intake port immersed in the upstream water-pouring area covered and sealed the dustproof basket. The siphon's water suction force caused dust to be sucked into the siphon water intake port along with the wire mesh of the dust-proof cage, causing the intake port to become blocked. In other words, the siphon hose of the pipe was crushed because water could not be continuously supplied into the pipe due to the siphon water suction. Also, the discharge volume varies depending on the magnitude of the values ​​of the siphon action, such as the length of the pipe material from the siphon water intake side to the pipe top, the length of the pipe material from the pipe top to the siphon discharge side, the head height from the water surface to the pipe top, and the elevation difference between the upstream water surface and the discharge port. When installing siphon water supply piping, if the piping is extended, especially if the head does not exceed 7m, or if the head difference is too large, exceeding 14m based on past experience, the negative pressure inside the pipe will become too great and will generate a large negative pressure that will crush and block the pipe. Therefore, the only way to solve this problem is to change the piping conditions by using a crane or other tool to raise the discharge port to reduce the head difference and relieve the negative pressure inside the piping. This method was applicable when there were no large fluctuations in the water level in the upstream reservoir, but when the water level in the reservoir fluctuated greatly, it was necessary to make efforts to adjust the height of the discharge port each time to adjust the head difference and prevent the negative pressure inside the pipe from becoming too large.In addition, the siphon function is characterized by the fact that the amount of water delivered varies depending on the length of the suction side pipe, the length of the downstream pipe, the lift between the water level in the reservoir and the top of the piping, and the difference in elevation (head difference) between the water level in the reservoir and the downstream discharge outlet. It is also theoretically possible that the negative pressure inside the pipe will become too great even before the siphon is activated due to piping conditions that are affected by the topography. Therefore, methods such as hoisting the discharge outlet with a wire or the like to increase its elevation and reduce the head difference with the water level in the reservoir have been tried, but repeatedly changing the elevation of the discharge outlet as the water level in the reservoir changes requires the use of a crane or the like, which is costly and cumbersome, and poses problems. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5785634 Summary of the Invention [Problem to be solved by the invention]

[0005] In order to solve the above-mentioned problems, the inventors have devised an air suction member that combines a pipe clogging prevention function to prevent clogging (collapse) of the pipe member, a siphon water supply amount adjustment function, and a siphon action stop function. The present invention is a siphon water supply device having an air suction member that adjusts the amount of air suction to reduce the negative pressure in the pipe member that may collapse due to poor piping conditions such as excessively large head difference by injecting air into the pipe member of the siphon device by adjusting the size of the suction hole of the air suction part, and a water supply method using the same. The object of the present invention is to provide a siphon water supply device equipped with an air suction member that combines a pipe clogging prevention function, a siphon water supply amount adjustment function, and a siphon action stop function, which can prevent the adverse effects of piping conditions such as excessively large head difference by changing the amount of air suction by adjusting the opening size of the air suction part of the suction hole using a ball valve or the like to change the amount of air suction, and [Means for solving the problem]

[0006] In order to achieve the above-mentioned main object, the present invention adopts the following means.

[0007] The air suction member of the present invention, which has a function of preventing pipe clogging (collapse) of the pipe member, a function of adjusting the amount of siphon water supply, and a function of stopping the siphon action, is provided in one of the pipe members constituting the siphon water supply device, and even if an increase in negative pressure inside the pipe member due to siphon piping conditions or fluctuations in the water level in the reservoir portion causes a head difference that is large enough to cause the pipe member to be clogged, the size of the suction hole in the air suction part is opened or closed in advance or according to the situation so that the negative pressure does not exceed a predetermined value, thereby allowing outside air to be sucked into the inside of the pipe member, thereby reducing the effect of the large negative pressure and preventing the pipe member from collapsing. To stop the siphon action, the air suction part of the air suction member can be opened widely to suck in a large amount of air and stop the siphon action. For example, it has been confirmed through experiments that after maintaining the siphoning action with a 50 mm diameter suction hole opened by 5 mm, the suction hole is fully opened to stop the siphoning, and then returned to the open position of 5 mm, when the siphoning is started again, the water supply device is operated with the suction hole open by 5 mm, and the siphoning action can be started again. Of course, the opening width of 5 mm is just one example, and the opening ratio can be selected as appropriate.

[0008] When the head is 7m or more due to the topography, the water supply work is performed by using both the submersible pump and the siphon water supply. However, instead of starting the submersible pump water supply with the air intake part of the air intake member for stopping the siphon closed as in the past, the submersible pump water supply is started with the intake hole open. When water starts to flow out of the siphon discharge port with the start of the submersible pump water supply, it is a guide for the start of the siphon action, so the opening area of ​​the air intake part of the air intake member is gradually reduced. This makes it possible to gradually increase the siphon action, and by gradually increasing the opening area of ​​the intake part, the amount of siphon water supply decreases, so the overall amount of water supply can be reduced. The air intake part of the air intake member is gradually opened and closed while closely watching the degree of blockage of the pipe member with the naked eye, or by attaching a flow meter or a barometer to the siphon water supply device, so that it is possible to prevent the pipe member from collapsing due to excessive negative pressure in the pipe member. The problem was solved by operating the submersible pump and the siphon together with the intake hole open. Furthermore, even when the head is 7m or less, if the head difference is 14m or more, the siphon start operation will be performed in the same way as when the head is 7m or more, and the siphon action will be started by operating the submersible pump with the suction hole open, and after startup, the submersible pump will be stopped and water supply work can be performed by siphon action alone.Even if the upstream siphon intake is blocked by debris or the like when the siphon is started and the negative pressure inside the pipe increases significantly, an amount of outside air proportional to the amount will be sucked in through the suction hole, preventing an excessive increase in negative pressure and preventing the pipe from being blocked (collapsed).

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

[0010] Furthermore, the present invention may be characterized in that the shape of the air intake section is square or rectangular, making it easier to determine the percentage of the opening state relative to the 100% fully open state. If the shape of the air intake section is circular or elliptical, the shape of the intake hole changes between a crescent shape and a full moon shape by operating the handle, but it is difficult to determine the numerical value of the percentage of the opening area relative to the 100% fully open state. Therefore, by making the shape of the intake hole of the air intake section according to the present invention square or rectangular, it is easier to visually determine the numerical value of the percentage of the opening area relative to the fully open state.

[0011] The air suction member, which combines a pipe clogging prevention function to prevent clogging (collapse) of the pipe member, a siphon water supply volume adjustment function, and a siphon stop function, is provided with a connecting flange. Therefore, by attaching the air suction member itself to the pipe member, it can be easily attached to part of the siphon water supply device, making it possible to increase or decrease the siphon water supply volume and preventing damage to the pipe member.

[0012] By adopting such a configuration, it is possible to easily prevent blockage (collapse) of the tubular member, enable adjustment of the amount of siphon water supply, and create an air intake section with a siphon stop function, thereby effectively preventing collapse of the tubular member and utilizing the siphon water supply operation.

[0013] In addition, the siphon water supply device of the present invention is a siphon water supply device equipped with an air intake section that combines a pipe clogging prevention function to prevent clogging (collapse) of the above-mentioned pipe member, a siphon water supply amount adjustment function, and a siphon stop function.

[0014] This makes it possible to provide a siphon water supply device that can adjust the amount of water supplied when utilizing the siphon action in water supply operations using only a siphon and in water supply operations using a siphon in combination with an underwater pump, and can reduce damage to pipe components caused by negative pressure.

[0015] Furthermore, according to the water supply method using a siphon water supply device having an air intake section that combines a pipe clogging prevention function to prevent clogging (collapse) of the pipe members, a siphon water supply amount adjustment function, and a siphon stop function, it is possible to provide a siphon water supply method using a siphon water supply device that can reduce damage to the pipe members caused by negative pressure generated in the pipe members due to improper piping of the pipe members due to terrain, etc. [Brief description of the drawings]

[0016] [Figure 1] 1 is a schematic diagram showing a siphon water supply device 200 equipped with an air suction member 100. In the figure, the water supply merging member 30 is in a "Y" shape, with a bifurcated structure on the upstream side, with the water supply device 20 connected to one side and the siphon suction pipe 11 connected to the other side, but the water supply merging member does not have to be this shape, and may be a water supply merging member in the shape of a "U" in Katakana, with the siphon suction pipe 11 as the vertically long part and the water supply device 20 connected to a pipe protruding obliquely from the side, or a water supply merging member in the shape of a straight pipe, with the water supply device 20 connected to the upstream side, with a siphon suction port provided on the side of the straight pipe and the suction port opened and closed by a check valve. [Diagram 2] Fig. 2A is a perspective view showing the outline of the configuration of air suction member 100 according to the first embodiment. Fig. 2B is a top view showing the outline of how the ball valve of opening / closing member 118 of air suction member 100, in which the outer periphery of air suction section 110 according to the first embodiment forms a circular or elliptical shape, is rotated by handle 115 to open suction hole 130. Fig. 2C is a top view showing the outline of the change in shape of air suction section 110, in which the outer periphery of air suction section 110 according to the first embodiment forms a circular or elliptical shape, is rotated by handle 115 to open air suction section 110. [Diagram 3]Fig. 3A is a perspective view showing the outline of the configuration of the air suction member 100 according to the second embodiment. Fig. 3B is a top view showing the outline of the ball valve of the opening / closing member 118 of the air suction section 110, whose outer periphery forms a square or rectangle, being rotated by the handle 115 to open the suction hole 130 according to the second embodiment. Fig. 3C is a top view showing the outline of the change in shape of the air suction section 110, whose outer periphery forms a square or rectangle, being rotated by the handle 115 to open the air suction section 110 according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

[0018] (First embodiment) First, a siphon water supplying device 200 equipped with an air suction member 100 according to the present invention will be described with reference to the drawings. A siphon water supplying device 200 according to the first embodiment is shown in Fig. 1. Fig. 1 is a diagram showing an outline of the configuration of a siphon water supplying device 200 using an air suction member 100 having an air suction section 110 according to the first embodiment.

[0019] As shown in FIG. 1, the siphon water supply device 200 according to the first embodiment comprises a water supply device 20 such as a submersible pump that is used when the siphon is started when the siphon head is 7 m or less, and that is used in combination when the siphon is started and thereafter to supply water when the head is 7 m or more, a siphon suction pipe 11 that performs water intake by siphon action after the siphon is started, a dustproof cage 15 that surrounds the outer periphery of the siphon suction port 11a of the siphon suction pipe 11 to prevent floating objects larger than the suction port from being sucked into the siphon suction pipe 11, and a water injection junction member 30 that supplies merged water from the water supply device 20 alone or the siphon alone toward the downstream pipe member 10 when water supply operation is performed using the water supply device 20 alone or when the water supply device 20 and the siphon water supply action are used in combination. The water supply device 20 is connected to one side of the bifurcated shape of the water supply junction member 30, and the siphon suction pipe 11 is connected to the other side of the bifurcated shape of the water supply junction member 30. The pipe member 10, through which the water conveyed from the water conveying device 20 or the siphon suction pipe 11 and both of them pass, continues downstream, and is configured by connecting the air suction member 100 to the top α and its periphery of the piping of the pipe member 10. Water passes through the inside of the pipe member 10 and is discharged at the most downstream part of the piping. 10b And the discharge port 10b The air outlet is provided with an air backflow prevention member 12 made of a flexible material. 10b 1 shows that the water injection junction member 30 has a "Y" shape with a bifurcated structure on the upstream side to which the water supply device 20 is connected at one end and the siphon suction pipe 11 at the other end, but the water injection junction member does not have to be limited to this shape and may be a water injection junction member having a "U" shape in which the vertically long part is the siphon suction pipe 11 and the water supply device 20 is connected to a pipe protruding obliquely from the side, or a water injection junction member having a straight pipe shape with the water supply device 20 connected to the upstream side, a siphon suction port provided on the side of the straight pipe and the suction port opened and closed by a check valve.

[0020] Air suction member 100 comprises a main body water passage section 150, an air suction section 110 provided in this main body water passage section 150, and connecting flanges 105 provided on both ends of this main body water passage section 150. This air suction section 110 comprises an opening / closing member 118 capable of adjusting the size of suction hole 130. Opening / closing member 118 can adjust suction hole 130 to any opening rate by using handle 115.

[0021] The air intake member 100, which is connected to the top of the piping of the siphon water supply device 200 according to the first embodiment or its periphery, is configured with a circular or elliptical outer periphery of its air intake part 110, as shown in Fig. 2. This is because a general-purpose ball valve 118 is used, which makes it easy to obtain, but since the opening shape of the ball valve 118, which is an opening / closing member, is also circular compared 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, it is difficult to visually estimate the guideline (area) of the open area of ​​the air intake hole 130, even if you try to open it to 50 percent, assuming a full moon is 100 percent.

[0022] In the second embodiment, as shown in Fig. 3B and Fig. 3C, the shape of the air intake section 110 is a vertically long shape, a substantially square shape, or a substantially rectangular shape with two opposing sides parallel to each other. 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, the shape of the air intake section 110 is a substantially square shape or a substantially rectangular shape, so that when determining the size of the opening of the intake hole 130, the opening rate of the intake hole 130 compared to the case of 100% full opening can be easily obtained by visual estimation. For example, if it is desired to achieve a 50% opening rate compared to 100% full opening, the approximate ratio can be achieved 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 section 110, and any desired water supply amount can be ensured. Even if the area is set to 30 percent of the fully open area, by manipulating the handle 115 and aligning the tip of the opening of the ball valve of the opening / closing member 118 to a position that is one-third of the opening by eye, any desired water supply volume can be achieved, making the operation significantly easier.

[0023] The basic installation method and usage method of the siphon water supply device 200 configured as above will be described. As for the installation method, the configuration diagram of the siphon water supply device 200 of the first embodiment and the second embodiment is shown in FIG. 1. The air intake part 110 configured in the first embodiment is characterized by having a circular or elliptical outer periphery of the opening and closing, and the air intake part 110 of the second embodiment is characterized by having an approximately square or approximately rectangular shape as shown in FIG. 3B and FIG. 3C of FIG. 3. Since the other configurations are the same in both embodiments, the basic installation method and usage method of the first embodiment and the second embodiment will be described together. The siphon water supply device 200 mainly shows a siphon water supply device 200 that has a pipe clogging prevention function, a siphon water supply amount adjustment function, and a siphon stop function, and is integrated with the pipe member 10 by connecting the air intake member 100 equipped with a connecting flange 105 to the main water passage part 150 by the connecting flange 105. When the siphon head is 7m or less, the water supply device 20 such as a submersible pump is mainly used when the siphon is started, and when the head is 7m or more, it is used in combination with the siphon water supply operation when the siphon is started and after the siphon is started to supply water. The water supply device 20 such as a submersible pump, the siphon water suction pipe 11 which performs water suction operation by siphon action after the siphon is started, the dustproof cage 15 which surrounds the outer periphery of the siphon water suction port 11a of the siphon water suction pipe 11 to prevent floating objects larger than the opening shape of the siphon water suction port 11a from being sucked into the siphon water suction port 11a, and the water supply merging member 30 which merges the water flows from the water supply device 20 alone or the siphon alone, or when the water supply device 20 and the siphon water supply action are used in combination, and the water supply device 20 is connected to one side of the bifurcated shape and the siphon water suction pipe 11 is connected to the other side. The pipe member 10 through which water sent from the water supply device 20 or the siphon suction pipe 11 passes continues downstream, and an air suction member 100 is connected to the top of the piping of the pipe member 10 and its periphery.Water passes through the main water passage section 150 to which the pipe member 10 is connected, and becomes the discharge outlet 10b at the most downstream part of the piping. The discharge outlet 10b is equipped with an air backflow prevention member 12 made of a flexible material, which serves the function of preventing air from flowing back from the discharge outlet 10b and entering the pipe member 10 that constitutes the siphon water supply device 200, thereby preventing the siphon action from stopping.

[0024] The method of use will be described. The method of use of the siphon water supply device 200 differs when the siphon head exceeds the limit head of 7m, so the case of a head of 7m or less will be described first. After arranging the siphon water supply device 200 and a power source such as a generator, the power source of the water supply device 20 such as a submersible pump is turned on to operate the water supply device 20 and pour water into the pipe member 10 of the siphon water supply device 200. When the water flows through the pipe member 10 of the siphon water supply device 200 in a full state and the water flows from the discharge port 10b at the downstream end without white bubbles, the power supply to the submersible pump is stopped. This function switches the flow from the water supply device 20 connected to one of the forks of the water supply junction member 30 to the flow of water sucked from the siphon water intake port 11a of the siphon water intake pipe 11 connected to the other fork, and the water supply operation is switched from the water supply operation of the water supply device 20 such as the submersible pump alone to the water supply operation of the siphon action alone, and the water supply operation is continued without consuming fuel or electricity. In this case, as a method of using the air intake section 110 to demonstrate its function, when the surface of the dustproof cage 15 covering the outer periphery of the siphon water intake port 11a becomes clogged with wood chips and dead leaves that have flowed out and are completely covered, the dustproof cage 15 is crushed by the suction force from the siphon water intake port 11a as described above. When such a phenomenon occurs, the siphon water intake port 11a becomes clogged with dust, and the siphon water intake operation does not function. The water downstream from the top of the pipe in the siphon water supply device 200 tries to flow downstream toward the downstream discharge port due to potential energy, but since the siphon water intake function stops and water is not supplied from upstream, an enormous negative pressure is generated in the siphon water supply device 200, including the pipe member 10, and the pipe member 10, which cannot withstand the enormous negative pressure, becomes clogged and damaged. The air intake part 110 assumes that the siphon action may generate an enormous negative pressure in such a pipe member 10, causing the pipe member 10 to become clogged and damaged, 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 to allow air to flow in at all times. If the amount of air flowing in from the intake hole 130 is small, the amount of siphon water supply decreases by a small amount, and if the amount of air flowing in from the intake hole 130 is large, the amount of siphon water supply decreases by a large amount.Since the amount of water required by siphon water supply at the site can be measured by a flow meter, when the handle 115 of the air suction part 110 is operated to rotate the ball valve of the opening / closing member 118 to adjust the size of the opening of the suction hole 130, the amount of water supply is checked by the flow meter, and the suction hole 130 of the air suction part 110 is adjusted to the required amount of water supply, and the operation of the handle 115 is stopped within that range. By constantly flowing in air, the amount of air constantly flowing in from the air suction part 110 increases as the negative pressure increases, so that before the phenomenon occurs in which the siphon water intake port 11a becomes clogged with dust, the siphon water suction operation does not function and an enormous negative pressure is generated inside the pipe member 10 of the siphon water supply device 200, the air pressure phenomenon can be maintained so that the inside of the pipe member 10 does not become an enormous negative pressure. In addition, when the water level in the upstream reservoir rises due to rainfall or the like and the elevation difference (hydraulic head difference) between the elevation of the water surface and the downstream siphon discharge outlet increases, the negative pressure in the pipe member 10 of the siphon water supply device 200 increases. Therefore, by also taking into account the fluctuation phenomenon of this hydraulic head difference and operating the handle 115 of the air intake section 110 to rotate the ball valve of the opening / closing member 118 to adjust the size of the intake hole 130 of the air intake section 110, a desired amount of air can be constantly flowing into the siphon water supply device 200. Even when there is a sudden 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 blockage or collapse of the pipe member 10. To repeat, due to the effect of changes in the negative pressure inside the pipe member 10, outside air is automatically caused to flow into the inside of the pipe member 10 from the air intake section 130 in accordance with the suction force corresponding to the change in negative pressure, so that as the water level 90a in the water-retaining section 90 drops and the head difference with the discharge port 10b decreases, the negative pressure eases and the amount of outside air sucked into the pipe member 10 decreases, thereby increasing the siphon water supply function. If the water level 90a in the water-retaining section 90 rises due to rainfall or the like and the head difference increases, the negative pressure inside the pipe member 10 increases, so the amount of outside air sucked into the pipe member 10 increases in response to this change, thereby preventing an increase in the negative pressure inside the pipe member 10 and preventing the pipe member 10 from becoming clogged. This is the siphon water supply device 200 and water supply method.

[0025] Next, we will explain how to use this siphon water supply device when the head is 7m or more. When the head is 7m or more, the head exceeds the limit head of the siphon, so the water supply device 20 such as a submersible pump will perform combined water supply work when the siphon is activated and when it is operating after the siphon is activated. However, when performing water supply work by using the water supply device 20 and the siphon water supply action in combination, according to actual construction results, the water supply amount increases to about twice the amount of water supply when the water supply device 20 such as a submersible pump is used alone, which has the advantage that the construction costs of the temporary water supply equipment, such as the number of water supply devices 20 installed and the number of generators in operation, and the fuel consumption costs, can be reduced by about half. In this case, too, by operating the handle 115 of the air intake section 110 to rotate the ball valve of the opening / closing member 118 to adjust the opening area of ​​the suction hole 130 of the air intake section 110, it is possible to prevent the negative pressure in the pipe member 10 from increasing to a level that could lead to damage to the pipe member 10 due to blockage of the upstream siphon water intake port 11a by dust, just as in the case of siphon water supply device 200 when the head is 7 m or less. Also, just as in the case of a head of 7 m or less, when the water level in the upstream reservoir rises due to rainfall or the like and the elevation difference (hydraulic head difference) between the elevation of the water surface and the downstream siphon discharge outlet 10b becomes large, the negative pressure in the pipe member 10 of the siphon water supply device 200 will increase. Therefore, by taking into account the fluctuation phenomenon of this hydraulic head difference, the handle 115 of the air intake section 110 is operated to rotate the ball valve of the opening / closing member to adjust the size of the intake hole 113 of the air intake section 110 to any size, so that any amount of air can be constantly flowing into the siphon water supply device 200. Even in the event of a sudden increase in negative pressure, the amount of air sucked in increases according to the increase in negative pressure, so that the increase in negative pressure in the pipe member 10 can be reduced and blockage or collapse of the pipe member 10 can be prevented.

[0026] When water is passed through the pipe member 10, the weight of the pipe member 10 increases, and in the case of a single pipe or the like that is supported at one point, the pipe member 10 becomes heavy due to the passing of water, and the pipe member 10 breaks at the support part and becomes clogged. When the pipe member 10 becomes clogged, the water flow cross section is blocked and water stops flowing, the water in the pipe member 10 that is piped downstream from the pipe top tries to move downstream due to potential energy, but since water cannot pass through the broken part on the single pipe, negative pressure increases from the broken part toward the downstream part of the pipe top. If this negative pressure exceeds the strength range of the pipe member 10, the phenomenon that the pipe member 10 becomes clogged over a long range can also be prevented.

[0027] In the present invention, an air suction member 100 is provided connected to a part of a pipe member 10 at or near the top of the pipe constituting the siphon water supplying device 200, and constitutes an air suction section 110. The air suction section 110 is intended to prevent the pipe member 10 of the siphon from being blocked by an increase in negative pressure inside the siphon water supplying device 200, which would otherwise occur due to an automatic increase in the amount of air flowing in from the suction hole 130 of the air suction section 110.

[0028] As shown in Figures 2 and 3, for example, by operating handle 115 of air intake part 110 to rotate the ball valve of opening / closing member 118 and adjusting the size of intake hole 130 of air intake part 110 to an arbitrary size, the amount of air flowing in from intake hole 130 changes as the suction force fluctuates from the normal negative pressure, thereby reducing the difference between the negative pressure inside tube member 10 and atmospheric pressure, thereby reducing the external pressure applied to tube member 10 from the outside and preventing tube member 10 from being crushed and damaged.

[0029] The air suction member 100 may be attached by connecting to the pipe member 10 at or near the top of the piping of the siphon water supply device 200 as shown in Fig. 1. The pipe member 10 is provided at its end with connecting flanges 105 that can be attached with bolts and nuts.

[0030] The suction hole 130 of the air intake section 110 described above allows air to flow into the inside of the pipe member 10 through the suction hole 130 of the air intake section 110, which is opened to an arbitrary size, when a predetermined negative pressure inside the pipe member 10 changes, thereby preventing the generation of negative pressure inside the pipe member 10 that would crush the pipe member 10 and preventing damage to the pipe member 10.

[0031] In addition, by attaching a negative pressure gauge to the piping material etc. to measure the negative pressure within the piping material while gradually opening and closing the opening and closing portion of the suction hole 130 of the air suction part 110 for adjusting the siphon water supply volume, it is possible to prevent the negative pressure within the piping material from becoming too large and causing the piping material to collapse.

[0032] The present invention is not limited to the above-described embodiment, and can be embodied in various forms within the technical scope of the present invention. [Industrial Applicability]

[0033] As shown in the above-described embodiment, the device can be used as a device for safely, cheaply and efficiently pumping water from reservoirs such as ponds, swamps, rivers, pools and dams, and also as a device that can prevent damage to the device itself. [Explanation of symbols]

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

Claims

1. In a siphon water supply device having a water injection and merging member on the upstream side that switches or merges the flow of a water supply device and a siphon suction pipe to supply water to the downstream side, The water injection and confluence member is a "Y" or "T" shaped member, or a straight pipe with a water supply device connected to the upstream side, a siphon water intake on the side of the straight pipe, and a check valve opening the water intake. A siphon water supply device comprising: connecting flanges provided at both ends of the main water supply part at and around the top of the piping of a pipe member which constitutes the main water supply part of the siphon water supply device; an air suction member connected to the connecting flanges as part of the siphon water supply device; the shape of the suction hole of the air suction member is circular or elliptical, and the opening rate of the suction hole is adjusted by operating a handle of the air suction member using an opening and closing member disposed inside, thereby providing a siphon water supply device with a function to prevent pipe blockage of the siphon water supply device, a function to adjust the amount of siphon water supply, and a function to stop the siphon.

2. In the siphon water supply device, the air suction member is integrated with a pipe member having connecting flanges at both ends, The siphon water pump according to claim 1, characterized in that the size of the suction hole of the air suction member can be adjusted by operating a handle with an opening and closing member arranged inside, and the opening rate of the suction hole can be visually determined.

3. 3. The siphon water conveying device according to claim 1, wherein the shape of the suction hole of the air suction member is, instead of being circular or elliptical, a vertically elongated shape with two opposing sides parallel to each other or a rectangle.

4. A siphon water pumping method using the siphon device according to any one of claims 1 to 3, This siphon water supply method is characterized in that, with the suction hole opened appropriately according to the site topographical conditions, etc., water is started to be supplied into the siphon water supply device by the water supply equipment, and when water begins to flow out of the siphon discharge port, the area of ​​the suction hole is gradually adjusted, thereby adjusting the siphon water supply amount to an appropriate amount and starting the siphon.

5. In the siphon water conveying device according to any one of claims 1 to 3, In order to be able to respond to the change in the negative pressure inside the siphon water supply device, the opening area of ​​the suction hole is adjusted according to the amount of water to be supplied before or after the siphon is started, and the siphon water supply operation is started in a state where the suction hole is opened appropriately, so that outside air is constantly flowing into the siphon water supply device. As a result, the outside air is constantly flowing into the siphon water supply device, and the siphon water intake becomes clogged or the water level of the water-filled part rises due to rainfall, etc., causing a large head difference with the discharge port. In this method, before a large negative pressure sufficient to crush the pipe member is applied inside the pipe member, outside air is automatically caused to flow into the inside of the pipe member through the suction hole in response to a suction force corresponding to the change in negative pressure in the pipe member due to the change in negative pressure inside the pipe member, thereby preventing the negative pressure from increasing inside the pipe member and preventing the pipe member from becoming clogged, and as the water level in the water-retaining section drops and the head difference with the discharge port becomes smaller, the negative pressure becomes weaker, thereby reducing the amount of outside air suctioned into the pipe member and increasing the siphon water supply function.

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