Siphon device capable of automatically adjusting water level of top cover

Abstract

The invention discloses a siphon device capable of automatically adjusting the water level of a top cover, the siphon device capable of automatically adjusting the water level of the top cover comprises a drain pipe, a submersible pump, a liquid level meter and a control mechanism, the first end of the drain pipe is located in the top cover and used for pumping water, and the second end of the drain pipe is located in a water collecting well and used for draining water; an electric adjusting valve is arranged on the water drainage pipe and used for controlling the flow speed, the submersible pump is located in the top cover, the submersible pump is connected with the first end of the water drainage pipe and used for conveying water, and the liquid level meter is arranged in the top cover and used for measuring the liquid level height of the top cover. The control mechanism is electrically connected with the electric adjusting valve, the submersible pump and the liquid level meter and controls the electric adjusting valve and the submersible pump to be opened and closed according to signals of the liquid level meter. The siphon device capable of automatically adjusting the water level of the top cover has the advantages of being small in workload of the water pump, convenient to operate and timely in water drainage.

Description

Technical Field

[0001] The invention relates to the technical field of drainage of hydropower stations, and in particular to a siphon device capable of automatically adjusting the water level of a top cover. Background Art

[0002] Currently, the top cover drainage of hydropower stations mostly adopts the top cover drainage pump drainage method. Multiple drainage pumps need to be arranged inside the top cover for drainage. The water pump drainage process consumes a lot of plant electricity. When the top cover drainage pump fails, the drainage pump must be replaced in time to avoid the occurrence of unit safety incidents caused by untimely drainage due to water pump failure, which consumes a lot of manpower and material resources. Summary of the Invention

[0003] The present invention aims to solve, at least to some extent, one of the technical problems in the related art. To this end, an embodiment of the present invention provides a siphon device that automatically adjusts the water level of a top cover. The siphon device automatically adjusts the water level of a top cover, which has the advantages of low pump workload, convenient operation, and timely drainage.

[0004] According to an embodiment of the present invention, a siphon device for automatically adjusting the water level of a top cover includes a drain pipe, a submersible pump, a liquid level gauge and a control mechanism. The first end of the drain pipe is located in the top cover for pumping water, and the second end of the drain pipe is located in the water collection well for draining water. An electric regulating valve is provided on the drain pipe to control the flow rate. The submersible pump is located in the top cover, and the submersible pump is connected to the first end of the drain pipe to transport water. The liquid level gauge is arranged in the top cover to measure the liquid level height of the top cover. The control mechanism is electrically connected to the electric regulating valve, the submersible pump and the liquid level gauge and controls the opening and closing of the electric regulating valve and the submersible pump according to the signal of the liquid level gauge.

[0005] The siphon device for automatically adjusting the water level of the top cover according to the embodiment of the present invention has the advantages of small workload of the water pump, convenient operation, and timely drainage. The present application has the following advantages: the pipeline siphon is directly established through the water pump, and automatic drainage can be achieved without exhausting or excessive operations. The regulating valve is in a normally open state. At the same time, the drainage pipe does not need to be submerged in the water collection well, and the outlet only needs to be lower than the water inlet. The device structure is simpler and more convenient to operate. The opening size is adjusted by the water level height in the top cover to control the balance between the drainage volume and the water leakage of the unit, so that the water level of the top cover remains basically unchanged, reducing the frequency of water pump startup.

[0006] In some embodiments, the drainage pipe includes a first section, a second section, and a third section connected in sequence, at least part of the first section is located in the top cover, at least part of the third section is located in the water collection well, and the electric regulating valve is arranged on the second section.

[0007] In some embodiments, the second section is higher than the first section and the third section in the vertical direction, the highest point of the drain pipe is located on the second section, and the lowest point of the drain pipe is located on the third section.

[0008] In some embodiments, the first section extends straightly along the inner wall of the top cover, the second section extends horizontally, and the third section extends along the inner wall of the water collection well.

[0009] In some embodiments, the diameter of the first section gradually decreases, the diameter of the second section remains the same, and the diameter of the third section gradually increases.

[0010] In some embodiments, the first section, the second section and the third section are connected by a flexible elbow.

[0011] In some embodiments, the difference between the highest point of the drain pipe and the liquid level height of the top cover is less than or equal to the maximum water column height under the atmospheric pressure at the top cover position.

[0012] In some embodiments, the second end of the drain pipe is vertically lower than the liquid level of the top cover.

[0013] In some embodiments, a check valve is provided at the first end of the drain pipe to prevent water from flowing back into the top cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 2 is a schematic structural diagram of a siphon device for automatically adjusting the water level of a top cover according to an embodiment of the present invention.

[0015] Figure numerals: 1. Drain pipe; 2. Submersible pump; 3. Liquid level gauge; 4. Control mechanism; 5. Electric regulating valve; 6. Top cover; 7. Water collection well. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0017] According to an embodiment of the present invention, a siphon device for automatically adjusting the water level of a top cover 6 includes a drain pipe 1, a submersible pump 2, a liquid level gauge 3, and a control mechanism 4. The first end of the drain pipe 1 is located within the top cover 6 for pumping water, and the second end of the drain pipe 1 is located within the sump for draining water. An electric regulating valve 5 is provided on the drain pipe 1 to control the flow rate. The submersible pump 2 is located within the top cover 6 and connected to the first end of the drain pipe 1 for delivering water. The liquid level gauge 3 is disposed within the top cover 6 to measure the liquid level in the top cover 6. The control mechanism 4 is electrically connected to the electric regulating valve 5, the submersible pump 2, and the liquid level gauge 3, and controls the opening and closing of the electric regulating valve 5 and the submersible pump 2 based on signals from the liquid level gauge 3. The submersible pump 2 is activated to drain water at or above the pump start level. When the water level drops to the pump stop level, the submersible pump 2 is shut down to stop draining water. The electric regulating valve 5 is controlled to maintain liquid in the drain pipe 1 to facilitate siphoning the next time the pump is started.

[0018] Drain pipe 1 is located at both ends of the hydropower station's turbine generator unit's roof 6 and the water collection well, respectively. Drain pipe 1 is activated by submersible pump 2 to create a siphon effect. Electric control valve 5 adjusts the valve opening to control the flow rate in drain pipe 1, thereby controlling the water level in roof 6. This reduces the frequency of submersible pump 2 activation, thus reducing electricity consumption. After submersible pump 2 has run for a period of time, drain pipe 1 fills with water, shutting down. The water in drain pipe 1 continues to flow into the water collection well due to inertia, creating a vacuum in drain pipe 1. Due to the atmospheric pressure difference between the inside and outside of drain pipe 1, the accumulated water in roof 6 is forced into drain pipe 1 by atmospheric pressure, creating a siphon effect in drain pipe 1.

[0019] The regulating valve opening is controlled. When the water level in the top cover 6 is low, the regulating valve opening is reduced. This reduces the water flow in the drain pipe 1, preventing the water level in the top cover 6 from dropping too quickly and disrupting the siphon effect. When the water level in the top cover 6 is high, the regulating valve opening is increased. This increases the water flow in the drain pipe 1, preventing the water level in the top cover 6 from rising too quickly, which could result in unsafe drainage. The arrangement of the electric regulating valve 5 can accommodate different drainage flow rates at different water levels.

[0020] Liquid level meter 3 monitors the liquid level inside top cover 6 in real time. Control mechanism 4, using a PLC control box, receives the liquid level signal and generates control instructions based on the liquid level data to control submersible pump 2 and electric control valve 5, thus automating the entire system. This automated control method significantly reduces manual intervention and improves the system's operating efficiency and reliability.

[0021] In some embodiments, the drainage pipe 1 includes a first section, a second section, and a third section connected in sequence, at least part of the first section is located in the top cover 6, at least part of the third section is located in the water collection well, and the electric regulating valve 5 is arranged on the second section.

[0022] Specifically, a portion of the first section is located inside the top cover 6 and is submerged in the water inside the top cover 6. The main function of the first section is to collect the water inside the top cover 6 and guide it to the second section of the drain pipe 1. The second section is the middle part of the drain pipe 1, which is mainly used to connect the first section and the third section, and the electric regulating valve 5 is arranged on this section. The setting of the electric regulating valve 5 makes the second section an area for controlling the water flow rate. By adjusting the opening of the electric regulating valve 5, the speed of the water flow from the first section to the third section can be accurately controlled, thereby realizing dynamic regulation of the drainage process. A portion of the third section is located in the water collection well and is used to drain water to the water collection well to ensure that the water can be discharged smoothly. The length of each section can be adjusted according to the actual working scenario. When the distance between the top cover 6 and the water collection well is too far, the length of the second section can be appropriately increased.

[0023] In some embodiments, the second section is higher than the first section and the third section in the vertical direction, the highest point of the drain pipe 1 is located on the second section, and the lowest point of the drain pipe 1 is located on the third section.

[0024] Specifically, after entering the first section, water enters the second section under the push of the submersible pump 2 and accumulates in the second section. After the second section is full, it flows to the third section. The height difference between the second and third sections helps to use siphon to drain water more smoothly. When the water flows through the highest point of the second section, negative pressure will be formed in the pipe, thereby using the siphon principle to accelerate the discharge of water.

[0025] In some embodiments, the first section extends straightly along the inner wall of the top cover 6, the second section extends horizontally, and the third section extends along the inner wall of the water collection well.

[0026] Specifically, the straight extension of the first section that fits the top cover 6 can ensure coverage of the water accumulation area in the top cover 6, ensuring that the accumulated water can be efficiently collected and introduced into the drain pipe 1. The straight extension structure also helps to reduce the resistance of the water flow when entering the drain pipe 1, allowing the water flow to enter the second section more smoothly.

[0027] The second section extends horizontally and is located at the highest point of the drain pipe 1. The horizontally extended second section provides a stable transition area for the water flow, so that the water flow can accumulate smoothly before entering the third section, making it easy to discharge the air in the second section, and also conducive to the installation and operation of the electric regulating valve 5, so as to facilitate the precise control of the water flow.

[0028] The third section extends along the inner wall of the water collection well and is located at the lowest point of the drainage pipe 1. This design allows the third section to smoothly guide the water flow into the water collection well, and the end of the third section does not need to be immersed in the water collection well, reducing the total length of the drainage pipe 1.

[0029] In some embodiments, the diameter of the tube in the first section gradually decreases, the diameter of the tube in the second section remains the same, and the diameter of the tube in the third section gradually increases.

[0030] Specifically, the first section increases the water flow rate by gradually reducing the pipe diameter, guiding the water flow to accelerate into the second section. The pipe diameter of the second section remains constant to keep the water flow rate stable and reduce the fluctuation of the water flow in the second section. The pipe diameter of the third section gradually increases to reduce the water flow rate and reduce the impact of the water flow on the pipeline.

[0031] The drainage pipe 1 is made of composite materials, with a smooth polytetrafluoroethylene coating on the inner layer to reduce water flow resistance; a high-strength fiber reinforced layer in the middle layer to improve the pressure resistance of the pipe; and a corrosion-resistant rubber layer on the outer layer to adapt to complex environments.

[0032] In some embodiments, the first section, the second section, and the third section are connected by a flexible elbow.

[0033] Specifically, the flexible elbow connects multiple pipe sections. The flexible elbow can be bent and adjusted within a certain range, absorbing the impact of water flow within the pipe and reducing vibration and damage to the pipe caused by the water flow. Furthermore, the presence of the flexible elbow makes the drainage pipe 1 more convenient during installation and maintenance, and can accommodate certain position deviations. This makes pipe installation more flexible and reduces pipeline vibration, thus protecting the pipe.

[0034] In some embodiments, the difference between the highest point of the drain pipe 1 and the liquid level height of the top cover 6 is less than or equal to the maximum water column height under atmospheric pressure at the position of the top cover 6 .

[0035] Specifically, the difference between the highest point of the drain pipe 1 and the liquid level height of the top cover 6 is less than or equal to the maximum water column height under atmospheric pressure at the top cover 6 position, ensuring the continuity and stability of the drainage process, especially when the water level changes greatly, the system can operate reliably.

[0036] In some embodiments, the second end of the drain pipe 1 is lower than the liquid level of the top cover 6 in the vertical direction.

[0037] Specifically, the second end of the drain pipe 1 (located in the third section and in the water collection well) is lower than the liquid level height of the top cover 6 in the vertical direction, ensuring that the water can be discharged smoothly under the action of gravity, avoiding poor drainage or stagnation of water flow due to the second end of the drain pipe 1 being too high, and facilitating the maintenance of siphoning.

[0038] In some embodiments, a check valve is provided at the first end of the drain pipe 1 to prevent water from flowing back into the top cover 6 .

[0039] Specifically, the check valve is installed at the first end of the drain pipe 1, where the drain pipe 1 contacts the water in the top cover 6. The check valve allows water to flow from the top cover 6 to the drain pipe 1, but prevents water from flowing back from the drain pipe 1 to the top cover 6. This prevents water backflow caused by system pressure changes, power outages, or other faults, and protects the water level control and structural safety of the top cover 6.

[0040] If the liquid level drops or the system malfunctions, the check valve automatically closes, preventing water from the sump from flowing back into the top cover 6 and preventing the water level inside the top cover 6 from rising abnormally. The check valve ensures one-way flow in the drainage system, maintains water level control in the top cover 6, avoids water level fluctuations caused by water backflow, and improves system stability.

[0041] In some embodiments, a vibrating member is provided on the second section of the drain pipe 1 , and the vibrating member is used to vibrate the second section to reduce bubbles attached to the inner wall of the second section.

[0042] Specifically, the vibrator is installed in the second section of the drain pipe 1, which is the highest point of the drain pipe 1. This location is chosen because the second section is the key area for water flow, and it is also the place where bubbles are most likely to accumulate. Bubbles may adhere to the pipe wall when water flows through, affecting the smoothness of the water flow and may even cause the siphon effect to be interrupted. The vibrator causes the second section of the drain pipe 1 to produce tiny vibrations through mechanical vibration. This vibration can effectively reduce the bubbles attached to the inner wall of the second section, preventing the accumulation of bubbles from causing poor water flow or interruption of the siphon effect. The vibrator can be an electromagnetic vibrator, a pneumatic vibrator or an electric vibrator. Bubbles attached to the pipe wall will affect the maintenance of the siphon effect. By reducing bubble attachment through the vibrator, the stable operation of the siphon effect can be ensured, and the interruption of the siphon caused by bubble accumulation can be prevented.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0045] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0046] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0047] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0048] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Any changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are within the scope of protection of the present invention.

Claims

1. A siphon device that automatically adjusts the water level of the top cover, characterized in that: include: a drain pipe, wherein the first end of the drain pipe is located in the top cover for pumping water, the second end of the drain pipe is located in the water collection well for draining water, and an electric regulating valve is provided on the drain pipe for controlling the flow rate; a submersible pump, the submersible pump being located in the top cover and connected to the first end of the drain pipe for conveying water; a liquid level gauge, arranged in the top cover to measure the liquid level height of the top cover; A control mechanism is electrically connected to the electric regulating valve, the submersible pump and the liquid level gauge and controls the opening and closing of the electric regulating valve and the submersible pump according to a signal from the liquid level gauge.

2. The siphon device for automatically adjusting the water level of the top cover according to claim 1, characterized in that: The drainage pipe includes a first section, a second section and a third section connected in sequence, at least a portion of the first section is located in the top cover, at least a portion of the third section is located in the water collection well, and the electric regulating valve is arranged on the second section.

3. The siphon device for automatically adjusting the water level of the top cover according to claim 2, characterized in that: The second section is higher than the first section and the third section in a vertical direction. The highest point of the drain pipe is located on the second section, and the lowest point of the drain pipe is located on the third section.

4. The siphon device for automatically adjusting the water level of the top cover according to claim 3, characterized in that: The first section extends straightly in contact with the inner wall of the top cover, the second section extends horizontally, and the third section extends along the inner wall of the water collection well.

5. The siphon device for automatically adjusting the water level of the top cover according to claim 3, characterized in that: include: The diameter of the first section gradually decreases, the diameter of the second section remains the same, and the diameter of the third section gradually increases.

6. The siphon device for automatically adjusting the water level of the top cover according to claim 3, characterized in that: The first section, the second section and the third section are connected via a flexible elbow.

7. The siphon device for automatically adjusting the water level of the top cover according to claim 1, characterized in that: The difference between the highest point of the drain pipe and the liquid level height of the top cover is less than or equal to the maximum water column height under the atmospheric pressure at the top cover position.

8. The siphon device for automatically adjusting the water level of the top cover according to claim 1, characterized in that: The second end of the drain pipe is lower than the liquid level of the top cover in the vertical direction.

9. The siphon device for automatically adjusting the water level of the top cover according to claim 1, characterized in that: A filter is set at the first end of the drain pipe to prevent debris from entering the drain pipe and avoid clogging.

10. The siphon device for automatically adjusting the water level of the top cover according to claim 1, characterized in that: A check valve is provided at the first end of the drain pipe to prevent water from flowing back into the top cover.

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