Hydraulically controlled gravity flow pipeline flow regulation system

Abstract

The present invention discloses a hydraulically controlled gravity flow pipeline flow regulating system, including a pressure reducing pool, a flow regulating valve, an orifice plate, a three-position four-way solenoid valve, a check valve, an energy storage pressure tank, a water filter, a drop-in type liquid level transmitter, a PLC control box and a wind-solar complementary power supply device. The internal space of the pressure reducing pool is divided into two parts connected at the top by a vertical partition, and a drop-in type liquid level transmitter is installed in the pressure reducing pool. The flow regulating valve and the orifice plate are installed in the main water inlet pipe of the water inlet pool, and the check valve, the energy storage pressure tank and the water filter are installed in the bypass pipe. The flow regulating valve controls the opening through the three-position four-way solenoid valve, and the water level signal of the pool and the opening of the flow regulating valve are uploaded to the PLC control box. The wind-solar complementary power supply device supplies power to the PLC control box, the liquid level transmitter and the solenoid valve. The present invention is simple and practical, safe and reliable in operation, greatly saves the cost of the external line connection project caused by the power supply of the flow regulating valve, and solves the requirements for flow control of the gravity flow system without an external line power supply.

Description

Technical Field

[0001] The invention relates to a flow regulating system for a gravity flow pipeline, in particular to a hydraulically controlled gravity flow pipeline flow regulating system. Background Art

[0002] Gravity flow pipeline system is widely used in water diversion, water supply and irrigation projects. The gravity flow pipeline system sets a pressure reducing pool in the middle or end of the pipeline. The main requirements and characteristics of the system design are to set a flow control valve in front of the pool to control the pipeline flow or complete multi-stage pressure reduction. Affected by the actual conditions on site, the flow control valve and other equipment are often in a position where no external power supply can be provided. In some areas, the wind and solar resources are even unstable. How to adjust the valve opening through the pipeline water pressure and reduce the power consumption of the system to ensure the long-term safe and stable operation of the entire gravity flow pipeline system, and at the same time combine the water level of the pool to avoid overflow and cavitation of the flow regulating valve, save project investment, and reduce unnecessary waste are the current difficulties. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a hydraulically controlled gravity flow pipeline flow regulation system, which has the advantages of safe and reliable operation, low system power consumption, investment saving, small engineering workload and convenient construction.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a hydraulically controlled gravity flow pipeline flow regulation system, including a pressure reducing pool, a flow regulating valve, an orifice plate, a three-position four-way solenoid valve, a check valve, an energy storage pressure tank, a water filter, a immersion type liquid level transmitter, a PLC control box and a wind-solar complementary power supply device. The internal space of the pressure reducing pool is divided by a vertical partition into two parts connected at the top, which are a pool buffer zone and a pressure reducing pool respectively. A immersion type liquid level transmitter is installed in the pressure reducing pool, the flow regulating valve and the orifice plate are installed on the main water inlet pipe of the pressure reducing pool, the check valve, the energy storage pressure tank and the water filter are installed on the bypass pipe, the flow regulating valve is controlled by the three-position four-way solenoid valve to control the opening, the water level signal of the pressure reducing pool and the opening of the flow regulating valve are uploaded to the PLC control box, the wind-solar complementary power supply device supplies power to the PLC control box through the power supply cable, and the immersion type liquid level transmitter and the three-position four-way solenoid valve are powered by the PLC control box.

[0005] The orifice plate is installed behind the flow regulating valve of the main water inlet pipeline.

[0006] The channel position of the three-position four-way solenoid valve is determined by the PLC control box according to the water level of the pressure reducing pool, and the energized side of the three-position four-way solenoid valve is determined; the stable clean water source provided by the energy storage pressure tank and the pool buffer zone after filtering by the water filter enters the driving unit of the flow regulating valve through the three-position four-way solenoid valve channel to adjust the opening, ensuring that the pool water level is maintained at the design water level as much as possible while reducing overflow.

[0007] The beneficial effects of the present invention are as follows: the three-position four-way solenoid valve adjusts the flow control valve opening by converting the channel position of the water level signal in the PLC control cabinet, which is a simple hydraulic control flow regulation system. The system power consumption is very small, and the power is supplied by the outdoor wind-solar complementary power supply device. The project investment is small, the project volume is small, the flow control and energy dissipation effect is good, the economy and energy saving are great, the construction is convenient, and the reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the hydraulically controlled gravity flow pipeline flow regulation system of the present invention. DETAILED DESCRIPTION

[0009] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0010] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0011] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0012] like Figure 1As shown, the hydraulically controlled gravity flow pipeline flow regulating system of the present invention comprises a pressure reducing pool 7, a flow regulating valve 1, an orifice plate 2, a three-position four-way solenoid valve 6, a check valve 3, an energy storage pressure tank 5, a water filter 4, an immersion type liquid level transmitter 11, a PLC control box 12 and a wind-solar complementary power supply device 13. The internal space of the pressure reducing pool 7 is divided into two parts connected at the top by a vertical partition 9, which are a pool buffer zone 8 and a pressure reducing pool 10 in turn. The immersion type liquid level transmitter 11, the flow regulating valve 1 and The orifice plate 2 is installed on the main water inlet pipe 14 of the pressure reducing water tank 10, the check valve 3, the energy storage pressure tank 5 and the water filter 4 are installed on the bypass pipe 15, the flow regulating valve 1 controls the opening through the three-position four-way solenoid valve 6, the water level signal of the pressure reducing water tank 10 and the opening of the flow regulating valve are uploaded to the PLC control box 12, the wind-solar complementary power supply device 13 supplies power to the PLC control box 12 through the power supply cable 16, and the immersion liquid level transmitter 11 and the three-position four-way solenoid valve 6 are powered by the PLC control box 12.

[0013] The orifice plate 2 is installed behind the flow regulating valve 1 of the main water inlet pipe 14 .

[0014] The channel position of the three-position four-way solenoid valve 6 is determined according to the water level of the pressure reducing pool 10, and the energized side of the three-position four-way solenoid valve 6 is determined by the PLC control box 12; the stable clean water source provided by the energy storage pressure tank 5 and the pool buffer area 8 after being filtered by the water filter 4 enters the driving unit of the flow regulating valve 1 through the channel of the three-position four-way solenoid valve 6 to adjust the opening, so as to ensure that the water level of the pool is maintained at the designed water level as much as possible while reducing overflow.

[0015] The opening degree of the flow control valve 1 is controlled by different channel positions of the three-position four-way solenoid valve 6 .

[0016] The wind-solar complementary power supply device 13 only supplies power to the PLC control box 1, the liquid level transmitter 1 and the solenoid valve 6, which reduces power consumption and enables the system to have reliable power supply for a long time.

[0017] The orifice plate 2 is installed behind the flow regulating valve 1 of the main water inlet pipeline 14 to provide back pressure for the high pressure reduction specific gravity flow pipeline flow regulating valve 1 and improve the anti-cavitation performance of the flow regulating valve.

[0018] The energy storage pressure tank 5 can be replenished with water after filtering impurities through the filter 4 through the main water inlet pipe 14, and absorb the pressure fluctuation of the main water inlet pipe 14 to improve the stability of the hydraulic transition process of the pipeline.

[0019] The water level in the pool buffer area 8 is relatively fixed and will not drop, which ensures that the back pressure behind the flow control valve 1 does not fluctuate, thereby improving the cavitation performance of the flow control valve 1 under low flow and low water level conditions.

[0020] Specifically, when the water level of the pool 10 drops to the low water level, the PLC control cabinet 12 energizes the left side of the three-position four-way solenoid valve 6, and the left channel is opened. The high-pressure water source in front of the flow control valve 1 causes its driving device to move right, increasing the valve opening, and the water in the right chamber of the flow control valve 1 regulating device is discharged to the back of the flow control valve 1; when the water level of the pool 10 returns to the normal water level, the PLC control cabinet 12 is powered off, and the three-position four-way solenoid valve 6 returns to the middle position. At this time, the opening of the flow control valve 1 is determined, and this opening is uploaded to the central control system through the PLC control cabinet 12.

[0021] When the water level of the pool 10 rises to the high water level, the PLC control cabinet 12 energizes the right side of the three-position four-way solenoid valve 6, and the right channel opens. The high-pressure water source in front of the flow control valve 1 causes its driving device to move left, reducing the valve opening, and the water in the left chamber of the flow control valve 1 regulating device is discharged to the back of the flow control valve 1; when the water level of the pool 10 returns to the normal water level, the PLC control cabinet 12 is powered off, and the three-position four-way solenoid valve 6 returns to the middle position. At this time, the opening of the flow control valve 1 is determined, and this opening is uploaded to the central control system through the PLC control cabinet 12.

[0022] In the present invention, the flow control valve 1 adjusts the opening through the three-position four-way solenoid valve 6. The solenoid valve 6 uses less electrodes and can be powered by the PLC control cabinet 12, which greatly reduces the investment in the external system power supply line caused by the power supply of the equipment. The rear orifice plate 2 of the flow control valve 1 can be adjusted and designed according to the pressure reduction ratio before and after the flow control valve 1 to ensure the back pressure of the flow control valve 1, which can effectively eliminate valve cavitation, reduce the noise and vibration during valve operation, and extend the service life of the flow control valve. The three-position four-way solenoid valve 6 changes the channel position according to the pressure difference of the pressure signal converted by the main water inlet pipe 14 after the energy storage pressure tank 5 is stabilized and the water level of the pool 10. The valve opening can be determined according to the change of the water level of the pool, and the pool is kept stable at the designed water level to avoid overflowing the pool, which is more energy-saving. The wind-solar complementary power supply device 13 is easy to install outdoors, uses wind energy and solar energy to charge the battery, and supplies power to the PLC control cabinet 12, the input liquid level transmitter 11 and the three-position four-way solenoid valve 6, and has high power supply reliability. This system has small engineering volume, good flow control and energy dissipation effect, is economical and effective, easy to construct and highly reliable.

[0023] The embodiments described above are only used to illustrate the technical ideas and features of the present invention, and their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. The patent scope of the present invention cannot be limited only by this embodiment, that is, any equivalent changes or modifications made to the spirit disclosed by the present invention still fall within the patent scope of the present invention.

Claims

1. A hydraulically controlled gravity flow pipeline flow regulation system, characterized in that: The invention comprises a pressure reducing water pool (7), a flow regulating valve (1), an orifice plate (2), a three-position four-way solenoid valve (6), a check valve (3), an energy storage pressure tank (5), a water filter (4), an immersion type liquid level transmitter (11), a PLC control box (12) and a wind-solar hybrid power supply device (13). The internal space of the pressure reducing water pool (7) is divided into two parts which are connected at the top by a vertical partition (9), namely a water pool buffer zone (8) and a pressure reducing water pool (10). An immersion type liquid level transmitter (11) is installed in the pressure reducing water pool. The flow regulating valve (1) and the orifice plate (2) are installed on the main water inlet pipe (14) of the pressure reducing water pool (7). The check valve (3), the energy storage pressure tank (5) and the water filter (4) are installed on the bypass pipe (15). The flow regulating valve (1) controls the opening degree through the three-position four-way solenoid valve (6). The water level signal of the pressure reducing water pool (10) and the flow regulating valve are connected to the pressure reducing water pool (10). The opening is uploaded to the PLC control box (12); the wind-solar hybrid power supply device (13) supplies power to the PLC control box (12) through the power supply cable (16); the input-type liquid level transmitter (11) and the three-position four-way solenoid valve (6) are powered by the PLC control box (12); the orifice plate (2) is installed behind the flow control valve (1) of the main water inlet pipe (14); the channel position of the three-position four-way solenoid valve (6) is determined by the PLC control box (12) according to the water level of the pressure reducing pool (10), and the power supply side of the three-position four-way solenoid valve (6) is determined; the stable clean water source provided by the energy storage pressure tank (5) and the pool buffer zone (8) after being filtered by the water filter (4) enters the driving unit of the flow control valve (1) through the channel of the three-position four-way solenoid valve (6) to adjust the opening, thereby ensuring that the water level of the pool is maintained at the design water level as much as possible while reducing overflow.

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