Energy-saving water suction chamber for vertical pump

Abstract

The present application relates to the field of fluid machinery, especially to a vertical pump energy-saving suction chamber. The purpose is to provide a vertical pump energy-saving suction chamber and installation method, which can optimize the performance of the suction chamber when the working condition changes in the pumping process of the pump station, and can upgrade the old equipment while reducing the consumption of electric energy resources. The technical scheme is a vertical pump energy-saving suction chamber, which comprises a suction chamber surrounded by a pump shell and a partition plate extending into the suction chamber from the generatrix direction of the pump shell; characterized in that: the partition plate is movably positioned in the sliding guide groove of the pump shell and is driven by a power mechanism; the partition plate is provided with a probe for detecting the water flow pressure and speed in the suction chamber.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fluid machinery, in particular to a vertical pump energy-saving suction chamber. BACKGROUND

[0002] The suction chamber, impeller and water pressure chamber are three flow components of a water pump, which determine the performance of the whole pump. The straight conical suction chamber, including the horn-shaped suction chamber, is widely used in large vertical pumps due to its simple structure and good hydraulic performance. Large vertical pumps are widely used in related pumping station projects such as farmland irrigation, inter-basin water transfer, flood control and drainage, etc. However, during the water pumping process in the pumping station, the water source area often experiences alternating changes between dry season and wet season due to changes in precipitation, resulting in unstable flow and flow rate of the pump inflow, and frequent changes in working conditions. The pre-whirl and flow conditions inside the suction chamber change significantly under different working conditions, and the flow loss increases, which often leads to a sharp decline in pump performance, allowing the pump to operate in an unreasonable range, thereby causing waste of electrical energy resources.

[0003] The existing straight conical suction chamber of a large vertical pump generally has an anti-pre-whirl baffle inside, but the length of the baffle cannot be adjusted. Due to the drastic changes in the working conditions of large vertical pumps, the flow and pre-whirl strength inside the suction chamber under different working conditions are different, so there is an urgent need for a suction chamber with adjustable baffle capability to optimize the hydraulic performance of the suction chamber under different working conditions and ultimately achieve the purpose of energy saving and efficiency improvement. SUMMARY

[0004] The present application aims to overcome the shortcomings of the above background technology and proposes a vertical pump energy-saving suction chamber and installation method. The device and method can optimize the performance of the suction chamber when the working conditions change during the water pumping process in the pumping station, and can also upgrade the old equipment while reducing the consumption of electrical energy resources.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A vertical pump energy-saving suction chamber, comprising a suction chamber surrounded by a pump shell and a baffle extending into the suction chamber from the generatrix direction of the pump shell; characterized in that: the baffle is movably positioned in the sliding guide groove of the pump shell and is driven by a power mechanism; the baffle is provided with a probe for detecting the water flow pressure and speed in the suction chamber.

[0007] The power mechanism is an electric hydraulic rod, including a hydraulic rod arranged in the baffle control box, a hydraulic pump for providing pressure oil to the hydraulic rod, and a motor for driving the hydraulic pump.

[0008] The baffle is movably positioned on the inner wall of the baffle control box through the guide groove arranged in the baffle control box; the rear end of the baffle extends into the baffle control box and is connected to the hydraulic rod, and the front end of the baffle is connected to the probe.

[0009] The baffle control box is located at the side of the water suction chamber and is provided with a water baffle between the water suction chamber and the baffle control box, the water baffle is provided with a through groove matched with the cross section of the baffle, and a plurality of sealing rubber strips for preventing water leakage are arranged on the four surrounding groove walls of the through groove.

[0010] The baffle control box is also provided with a plurality of waterproof columns for preventing the baffle from moving, a hydraulic oil pump connected with the waterproof columns, and a driving motor for driving the hydraulic oil pump; the waterproof columns are flexible pipes for conducting pressure oil.

[0011] Two positioning blocks are fixed in the baffle control box, the two positioning blocks are symmetrically arranged on both sides of the baffle, a door groove is arranged on the side surface of the baffle facing the positioning blocks, and the waterproof columns are arranged in the door groove.

[0012] The number of the waterproof columns is four, and the waterproof columns are symmetrically arranged along both sides of the baffle.

[0013] The hydraulic rod is controlled by a three-way control switch, the driving motor is controlled by a motor switch, and the three-way control switch is connected with the motor switch through a PLC controller to realize linkage of the two.

[0014] Compared with the prior art, the baffle control box has the following beneficial effects: the driving electric hydraulic rod drives the baffle to move, so that the baffle has an adjustable function, the internal flow distribution and pre-rotation function of the water suction chamber under different working conditions are optimized, the waterproof column structure can not only effectively keep the baffle in a static state, but also form a double leakage prevention structure with the sealing rubber strips, and effectively reduce the leakage loss of the water suction chamber, the three-way switch and the motor switch are linked, and the operation is simple and convenient, the speed and pressure probes arranged on the baffle can output the fluid speed and pressure information in the water suction chamber in real time, and corresponding baffle extension and contraction adjustment operations are performed, and the operation is simple and the design is reasonable. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is one of the schematic diagrams of the three-dimensional structure of the embodiment of the application.

[0016] Figure 2 It is the second schematic diagram of the three-dimensional structure of the embodiment of the application.

[0017] Figure 3 It is the schematic diagram of the enlarged structure at A in Figure 2

[0018] Figure 4 It is the schematic diagram of the enlarged structure at B in Figure 2

[0019] ​​The figure mark: 1, water suction chamber; 2, water suction chamber inlet flange; 3, water suction chamber outlet flange; 4, probe; 5, partition; 6, partition control box; 7, hydraulic rod; 8, output line interface; 11, guide groove plate; 12, sealing rubber strip; 13, drive motor; 14, motor frame; 15, water baffle; 17, positioning block; 18, waterproof column; 19, three-way control switch; 20, hydraulic oil pump; 21, motor switch. DETAILED DESCRIPTION

[0020] The application will be described in detail below with reference to the embodiments shown in the drawings of the application.

[0021] The energy-saving water suction chamber of the vertical pump shown in the drawings comprises a water suction chamber 1 surrounded by a horn-shaped pump shell, the bottom of the water suction chamber 1 is connected with the pump station pipeline through a water suction chamber inlet flange 2, and the top is a water suction chamber outlet flange 3 connected with the pump body, so as to realize the installation of the water suction chamber. The partition is movably positioned on the pump shell and extends into the water suction chamber from the generatrix direction of the pump shell; the side surface of the water suction chamber is provided with a partition control box 6, two electric hydraulic rods 7 of the same structure are installed in the partition control box 6; the electric hydraulic rod comprises a hydraulic rod, a hydraulic pump for outputting pressure oil to the hydraulic rod through an oil pipe, and a motor for driving the hydraulic pump (the motor and the hydraulic pump are omitted in the figure); the rod seats of the two hydraulic rods are respectively fixed on the inner wall of the partition control box 6 through bolts. A plurality of guide groove blocks 11 for sliding cooperation with the partition are also fixed on the inner wall of the partition control box, forming guide grooves required for the sliding of the partition; the rear end of the partition 5 extends into the partition control box and is connected with the front end of the hydraulic rod through a bolt and a nut; the front surface of the partition is provided with a pressure and speed probe 4, and the rear end of the partition is provided with an output line interface 8 of the pressure and speed probe 4, which is used to connect an external display device (such as a display screen) through a data line to output the detection signal of the probe in real time.

[0022] A water baffle 15 is arranged between the partition control box and the water suction chamber, and a through groove for the partition to pass through is formed in the water baffle; the shape and size of the through groove are suitable for the cross section of the partition, and a water blocking groove is formed in the groove wall around the partition, and a sealing rubber strip 12 is arranged in the water blocking groove to prevent water leakage. Figure 3 The sealing rubber strip 12 is arranged in two groups in parallel, and the number thereof can be determined according to requirements.

[0023] A waterproof column 18 is further arranged in the partition control box. Figure 3 Two positioning blocks 17 are fixed in the partition control box, and the two positioning blocks are symmetrically arranged on the two sides of the partition; a door groove is formed in the surface of the positioning block facing the partition, and the waterproof column 18 is arranged in the door groove. Figure 3The number of waterproof columns is four and symmetrically arranged with the partition plate; the waterproof columns are flexible pipes (such as rubber pipes) connected with hydraulic oil, and when the hydraulic oil pressure increases, the waterproof columns are forced to increase in diameter and protrude out of the door groove, thereby increasing the pressure on the partition plate and making the partition plate move to generate resistance; when the hydraulic oil pressure decreases, the waterproof columns correspondingly decrease in diameter and retract into the door groove, and are out of contact with the partition plate. The partition plate control box is provided with a driving motor 13 for driving a hydraulic oil pump 20, which is connected with the waterproof columns 18 through flexible pipes. The driving motor and the hydraulic oil pump are installed on a motor rack 14 outside the partition plate control box 6, and the partition plate control box is provided with a three-way control switch 19 for controlling the electric hydraulic rod and a motor switch 21 for controlling the driving motor. The three-way control switch 19 is connected with the motor switch through a PLC controller (omitted in the figure), so that the three-way control switch 19 and the motor switch are linked.

[0024] Working principle: when the user needs to adjust the length of the partition plate 5 in the water suction chamber, the three-way control switch 19 is pulled upward, at this time the motor switch 21 is automatically pulled downward under the control of the PLC, the driving motor 13 is reversed to drive the hydraulic oil pump 20 to work in reverse, the hydraulic oil in the waterproof column 18 is pumped out, the waterproof column is depressurized, and then the motor switch 21 is delayed to return to the middle position, and the driving motor 13 stops working; then the electric hydraulic rod 7 starts to work, pushes the partition plate 5 to the corresponding position, and then the three-way control switch 19 is pulled back to the middle position, and the electric hydraulic rod 7 stops working, at this time the motor switch 21 is automatically pulled upward under the control of the PLC, the driving motor 13 is forward to drive the hydraulic oil pump 20 to work in the forward direction, the hydraulic oil is pressed into the waterproof column 18, the waterproof columns 18 on both sides of the partition plate 5 expand and hold the partition plate 5, and the gap in the door groove 17 is sealed, which greatly improves the effect of waterproof sealing. When the user needs to retract the partition plate 5, the operation is opposite to the above operation.

[0025] In addition, the pressure and speed information of the water suction chamber can be transmitted in real time from the output line interface 8 according to the pressure and speed probe 4 installed in the partition plate 5, and the radial length position of the partition plate 5 under different working conditions is adjusted correspondingly to achieve relatively optimal hydraulic performance under a certain working condition, so that the hydraulic performance of the water suction chamber can be optimized.

[0026] The above can realize the telescopic function of the water suction chamber partition plate 5 and the acquisition of the pressure and speed information of the partition plate 5, which is simple to operate and reasonable in design, and achieves the effect of energy saving and efficiency improvement.

[0027] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A vertical pump energy-saving suction chamber, comprising a suction chamber (1) surrounded by a pump shell and a partition plate (5) extending into the suction chamber from the generatrix direction of the pump shell; characterized in that: The partition plate is movably positioned in a sliding guide groove of the pump shell and is driven by a power mechanism; the partition plate is provided with a probe (4) for detecting the water flow pressure and speed in the water suction chamber; The power mechanism is an electric hydraulic rod (7) including a hydraulic rod provided in the partition plate control box, a hydraulic pump for providing pressure oil for the hydraulic rod, and a motor for driving the hydraulic pump; The partition plate is movably positioned on the inner wall of the partition plate control box through a guide groove provided in the partition plate control box; the rear end of the partition plate extends into the partition plate control box and is connected with the hydraulic rod, and the front end of the partition plate is connected with the probe; The partition plate control box is located on the side of the water suction chamber and is provided with a water baffle (15) between the water suction chamber; the water baffle is provided with a through groove matching the cross section of the partition plate, and a plurality of sealing rubber strips (12) for preventing water leakage are arranged on the four surrounding groove walls of the partition plate facing the through groove; A plurality of waterproof columns (18) for preventing the movement of the partition plate are further provided in the partition plate control box; a hydraulic oil pump (20) connected with the waterproof columns and a driving motor (13) for driving the hydraulic oil pump are further provided; the waterproof columns are flexible pipes for conducting pressure oil; The hydraulic rod is controlled by a three-way control switch (19), and the driving motor is controlled by a motor switch (21); the three-way control switch is connected with the motor switch through a PLC controller to realize the linkage of the two.

2. The energy efficient standing pump suction chamber of claim 1, wherein: Two positioning blocks (17) are fixed in the partition plate control box; the two positioning blocks are symmetrically arranged on the two sides of the partition plate; a door groove is formed on the side surface of the partition plate facing the positioning blocks, and the waterproof columns are arranged in the door groove.

3. The energy efficient standing pump suction chamber of claim 2, wherein: The number of the waterproof columns (18) is four, and the waterproof columns are symmetrically arranged on the two sides of the partition plate.

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