CN212177441U - Pump station with self-adjusting capability - Google Patents

Abstract

The utility model discloses a pump station with self-interacting ability. The small and medium water pumps are limited by the structural volume, so that mechanical hydraulic devices are not convenient to configure, generally only adopt a half-adjustment function, and the angle-variable economic operation is difficult to realize. The utility model comprises a controller, a power supply module, a wireless communication module, a centrifugal pump, an adjusting switch, a control button group, a first motor driving module, a second motor driving module, a flow sensor, an emergency stop switch, a first stop valve and a second stop valve; the centrifugal pump comprises a pump body, a pump cover, an impeller and a guide vane assembly. The guide vane assembly comprises a guide vane disc, a guide vane, a connecting shaft, a gear and a guide vane motor. The utility model discloses can be automatically according to current water conservancy condition, control impeller rotational speed and the inclination of stator, and then the characteristic curve of control centrifugal pump realizes the high efficiency work of centrifugal pump.

Description

Pump station with self-adjusting capability

Technical Field

The utility model relates to a water conservancy pump station technical field more particularly, relates to a pump station with self-interacting ability.

Background

For medium and large water pumps, one of the most effective methods for improving the operation efficiency is as follows: and changing the operation condition of the water level difference between the upstream water level difference and the downstream water level difference in real time, and keeping the water level difference to operate in a high-efficiency working condition area.

The large and medium-sized pump stations often face the problems that the variation of hydraulic factors such as water level, lift and flow is large and the variation frequency is large, such as south-to-north water transfer east line engineering, the influence of the tide level of Yangtze river is caused, the water level has two peaks and valleys every day, the variation reaches 1.5-2.3 m, the pump stations operate in a deviated optimal working condition area for a long time, the efficiency is low, and the cost is high.

The small and medium water pumps are limited by the structural volume, so that mechanical hydraulic devices are not convenient to configure, generally only adopt a half-adjustment function, and the angle-variable economic operation is difficult to realize. Although some large-scale pump stations are provided with blade adjusting devices at present and can realize variable-angle economic operation, the traditional electro-mechanical-hydraulic control system is complex and difficult to operate and maintain, and the pump stations for realizing variable-angle economic operation are tiny.

The problems of cavitation, unit structural strength, bearing service life, flow state change of a water flow channel, critical rotation speed verification and the like can occur after the speed of the water pump is changed, so that the uneven distribution of flow speed and pressure in the pump body is caused, and the unit vibration is further aggravated.

SUMMERY OF THE UTILITY MODEL

In order to overcome the deficiencies that exist among the prior art, the utility model provides a pump station with self-interacting ability.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a pump station with self-adjusting capability comprises a controller, a power supply module, a wireless communication module, a centrifugal pump, an adjusting switch, a control button group, a first motor driving module, a second motor driving module, a flow sensor, an emergency stop switch, a first stop valve and a second stop valve; the power supply module is connected with a power supply and supplies power to the controller, the wireless communication module, the first motor driving module and the second motor driving module; an emergency stop switch is arranged between the power supply module and the power supply; the adjusting switch and the control button group are connected with the controller; the controller drives the motor through the first motor driving module, and drives the guide vane motor through the second motor driving module; the water inlet of the centrifugal pump is communicated with the water outlet of the first stop valve; the water inlet of the first stop valve is communicated with a water source; a flow sensor is arranged at the water outlet of the centrifugal pump; the water outlet of the centrifugal pump is communicated with the water inlet of the second stop valve; the water outlet of the second stop valve is connected with a water outlet pipeline; the controller transmits the numerical value transmitted by the flow sensor to the upper computer through the wireless communication module;

the first terminal of the first stop valve is connected with the first terminal of the second stop valve and a normally open contact of the emergency stop switch; the other normally open contact of the emergency stop switch is connected with the anode of the battery; the negative pole of the battery is connected with the second terminal of the first stop valve and the second terminal of the second stop valve; one normally closed contact of the emergency stop switch is connected with a power supply, and the other normally closed contact of the emergency stop switch is connected with a power supply module;

the centrifugal pump comprises a pump body, a pump cover, an impeller and a guide vane assembly; the front end of the pump body is communicated with a water inlet, the upper end of the pump body is communicated with a water outlet, the rear end of the pump body is hermetically connected with a pump cover, the pump body and the pump cover form a cavity, and a guide vane assembly and an impeller are arranged in the cavity; the pump cover is provided with a first groove close to the middle part of the end surface of the cavity, the pump cover is provided with a plurality of guide vane connecting grooves close to the periphery of the end surface of the cavity in the radial direction, and the guide vane connecting grooves are distributed outside the first groove and are not communicated with the first groove independently; the guide vane assembly comprises a guide vane disc, guide vanes, a connecting shaft, gears and a guide vane motor, the guide vane disc is arranged in a first groove, the guide vane disc is close to the end face of the cavity and is provided with a second groove, the guide vane disc is close to the periphery of the end face of the cavity and is evenly hinged and connected with the guide vanes, the number of the guide vanes is matched with the number of the guide vane connecting grooves, the other ends of the guide vanes are provided with sliding shafts, the sliding shafts are arranged in the guide vane connecting grooves and are in sliding connection with the guide vane connecting grooves, the end faces of the guide vane disc, which are hinged with the guide vanes, and the end faces of the pump cover, which are provided with the guide vanes, are on the same horizontal plane, the centers of the guide vane disc are connected with the connecting shaft in a penetrating way, one end of the connecting shaft is fixedly connected with, the driving gear is meshed with the gear, and the connecting shaft is in rotary sealing connection with the pump cover; the impeller is arranged in the second groove, a pump shaft of the centrifugal pump penetrates through the connecting shaft and is fixedly connected with the impeller, the torque of the motor is transmitted to the impeller and drives the impeller to rotate, and the pump shaft is in rotary sealing connection with the connecting shaft; the impeller, the second groove, the guide vane disc, the connecting shaft, the first groove and the central axis of the gear are collinear.

Further, the controller adopts a PLC of Siemens S7-200 series CPU226 type.

Further, the guide vanes are opposite to the bending direction of the blades in the impeller.

Furthermore, a first encoder is fixed at the rear end of the motor, and an input shaft of the first encoder is fixed with an output shaft of the motor; and a second encoder is fixed at the rear end of the guide vane motor, and an input shaft of the second encoder is fixed with an output shaft of the guide vane motor.

Further, the device also comprises a liquid level sensor; the liquid level sensor is arranged at the bottom of the water source and is connected with the controller.

Compared with the prior art, the utility model discloses the beneficial effect who has does:

1. the utility model discloses can be automatically according to current water conservancy condition, control impeller rotational speed and the inclination of stator, and then the characteristic curve of control centrifugal pump realizes the high efficiency work of centrifugal pump.

2. The utility model discloses a stator motor rotates all blades of simultaneous control stator and rotates, simple structure, the dependable performance.

3. The utility model discloses utilize emergency stop switch's normally open contact to come the locking centrifugal pump, guaranteed the security under the emergency.

Drawings

FIG. 1 is a block diagram of the system of the present invention;

FIG. 2 is a wiring diagram of the first stop valve and the second stop valve of the present invention;

FIG. 3 is a schematic view of the centrifugal pump of the present invention;

FIG. 4 is a schematic view of the inside of the centrifugal pump of the present invention;

FIG. 5 is a schematic view of the pump cover of the present invention;

fig. 6 is a top view of the guide vane assembly of the present invention;

fig. 7 is a side view of the guide vane assembly of the present invention;

FIG. 8 is a schematic view of the gear and drive gear connection;

fig. 9 is a schematic view of the impeller of the present invention;

FIG. 10 is a schematic view of the impeller and vane assembly rotation;

FIG. 11 is a schematic vane rotation.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-2, a pump station with self-regulation capability comprises a controller 1, a power supply module 2, a wireless communication module 3, a centrifugal pump 4, a regulation switch 5, a control button set 6, a first motor driving module 7, a second motor driving module 8, a flow sensor 10, an emergency stop switch SB1, a first stop valve and a second stop valve; the power supply module 2 is connected with a power supply and supplies power to the controller 1, the wireless communication module 3, the first motor driving module 7 and the second motor driving module; an emergency stop switch SB1 is arranged between the power supply module 2 and the power supply; the scram switch SB1 is used to stop the operation urgently when an abnormal condition occurs. The adjusting switch 5 and the control button group 6 are both connected with the controller 1; the regulating switch 5 is used to select whether the centrifugal pump 4 is automatically controlled by the controller 1. The control button group 6 includes an impeller speed increasing button, an impeller speed decreasing button, a guide vane angle increasing button, and a guide vane angle decreasing button. The impeller speed increasing button, the impeller speed decreasing button, the guide vane angle increasing button and the guide vane angle decreasing button are used for controlling the motor and the guide vane motor to rotate under the condition of being automatically controlled by the controller 1. The controller 1 drives the motor through the first motor driving module 7, and the controller 1 drives the guide vane motors 4-12 through the second motor driving module 8; the water inlet of the centrifugal pump 4 is communicated with the water outlet of the first stop valve; the water inlet of the first stop valve is communicated with a water source; the bottom of the water source is provided with a level sensor 9. The level sensor 9 is used to detect the depth of the water source. A flow sensor 10 is arranged at the water outlet of the centrifugal pump 4; the flow sensor 10 is used to detect the flow in the pump. The water outlet of the centrifugal pump 4 is communicated with the water inlet of the second stop valve; the water outlet of the second stop valve is connected with a water outlet pipeline; the controller 1 transmits the value transmitted by the flow sensor 10 to the PC end of the staff and the mobile monitoring equipment through the wireless communication module 3, so that the centrifugal pump 4, the controller 1, the PC end and the mobile monitoring equipment of the staff are closely associated, and the purpose of control is achieved. The controller employs a Siemens S7-200 series CPU226 PLC. The first motor driving module and the second motor driving module adopt Siemens STC12C5A60S 2.

As shown in fig. 2, the first terminal of the first cut-off valve YV1 is connected to the first terminal of the second cut-off valve YV2 and a normally open contact of the scram switch SB 1. The other normally open contact of the emergency stop switch SB1 is connected with the positive electrode of the battery; the negative electrode of the battery is connected to the second terminal of the first cut-off valve YV1 and the second terminal of the second cut-off valve YV 2. One normally closed contact of the emergency stop switch SB1 is connected to the power supply and the other normally closed contact is connected to the power supply module 2.

As shown in fig. 3-9, the centrifugal pump 4 comprises a pump body 4-1, a pump cover 4-2, an impeller 4-3 and a guide vane assembly; the front end of the pump body 4-1 is communicated with a water inlet 4-4, the upper end of the pump body is communicated with a water outlet 4-5, the rear end of the pump body 4-1 is hermetically connected with a pump cover 4-2, the pump body 4-1 and the pump cover 4-2 form a cavity, and a guide vane assembly and an impeller 4-3 are arranged in the cavity; the pump cover 4-2 is provided with a first groove 4-6 close to the middle part of the end face of the cavity, the pump cover 4-2 is provided with a plurality of guide vane connecting grooves 4-7 close to the periphery of the end face of the cavity in the radial direction, and the guide vane connecting grooves 4-7 are distributed outside the first groove 4-6 and are not communicated with the first groove 4-6 independently; the guide vane assembly comprises guide vane discs 4-8, guide vanes 4-9, a connecting shaft 4-10, gears 4-11 and a guide vane motor 4-12, wherein the guide vane discs 4-8 are arranged in first grooves 4-6, second grooves 4-13 are formed in the guide vane discs 4-8 close to the end face of a cavity, guide vanes 4-9 are uniformly hinged and connected to the peripheries of the guide vane discs 4-8 close to the end face of the cavity, the number of the guide vanes 4-9 is matched with the number of the guide vane connecting grooves 4-7, sliding shafts 4-14 are arranged at the other ends of the guide vanes 4-9, the sliding shafts 4-14 are arranged in the guide vane connecting grooves 4-7 and are in sliding connection with the guide vane connecting grooves 4-7, the sliding shafts 4-14 are in smooth connection with the guide vane connecting grooves 4-7, and when the guide vanes 4-9 rotate along with the guide vane discs, the guide vanes 4-9 rotate along with the hinged points thereof simultaneously, so that the sliding shafts 4-14 slide in the guide vane connecting grooves 4-7, and the sliding shafts 4-14 are adapted to the guide vane connecting grooves 4-7, thereby ensuring that the guide vanes cannot shake due to water pressure when the guide vane disc 4-8 is not moved; the end face of the guide vane disk 4-8 hinged to the guide vane 4-9 and the end face of the pump cover 4-2 provided with the guide vane connecting groove 4-7 are on the same horizontal plane, the center of the guide vane disk 4-8 is connected with a connecting shaft 4-10 in a through mode, one end of the connecting shaft 4-10 is fixedly connected with the guide vane disk 4-8, the other end of the connecting shaft penetrates through the first groove 4-6 and extends out of the pump cover 4-2, the connecting shaft 4-10 is rotatably connected with the pump cover 4-2 through a bearing, the outer wall of the connecting shaft 4-10 is fixedly connected with the inner ring of the bearing, the pump cover 4-2 is fixedly connected with the outer ring of the bearing, and the connecting shaft 4-10; a gear 4-11 is fixedly arranged at the penetrating end of the connecting shaft 4-10, the guide vane motor 4-12 is arranged outside the pump cover 4-2, a driving gear 4-16 is fixedly connected to the end part of a motor shaft of the guide vane motor 4-12, the driving gear 4-16 is meshed with the gear 4-11, and 4-12 shown in fig. 8 is a motor shaft of the guide vane motor; the connecting shaft 4-10 is in rotary sealing connection with the pump cover 4-2; the impeller 4-3 is arranged in the second groove 4-13, the pump shaft of the centrifugal pump penetrates through the connecting shaft 4-10 and is fixedly connected with the impeller 4-3, the connecting shaft 4-10 is rotatably connected with the pump shaft through a bearing, the inner wall of the connecting shaft 4-10 is fixedly connected with the outer ring of the bearing, the pump shaft is fixedly connected with the inner ring of the bearing, the connecting shaft 4-10 and the pump shaft are sealed by adopting the existing centrifugal pump shaft sealing mechanism, the pump shaft transmits the motor torque to the impeller 4-3 and drives the impeller 4-3 to rotate, and the pump shaft is rotatably and hermetically connected with the connecting shaft 4-10; the central axes of the impeller 4-3, the second groove 4-13, the guide vane disk 4-8, the connecting shaft 4-10, the first groove 4-6 and the gear 4-11 are collinear. The guide vanes 4-9 are opposite to the bending direction of the blades in the impeller 4-3.

In the embodiment, the connection mode of the pump cover 4-2 and the pump body 4-1, the connection of the connecting shaft 4-10, the pump cover 4-2 and the motor shaft adopt the sealing connection structure in the prior art; the pump body adopts the common shape of the centrifugal pump in the prior art, and the pump cover is designed into the shape matched with the pump body. The guide vane disk 4-8 is connected with the first groove 4-6, the impeller 4-3 is connected with the second groove 4-13 in a relative rotation manner, and certain gaps are arranged between the guide vane disk 4-8 and the first groove 4-6, and between the impeller 4-3 and the second groove 4-13, so that smooth rotation is ensured. The sliding shafts 4-14 are in sliding connection with the guide vane connecting grooves 4-7, and the diameters of the sliding shafts 4-14 are matched with the widths of the guide vanes, so that relative stability is guaranteed.

In this embodiment, a first encoder is fixed at the rear end of the motor, and an input shaft of the first encoder is fixed with an output shaft of the motor; and a second encoder is fixed at the rear end of the guide vane motor, and an input shaft of the second encoder is fixed with an output shaft of the guide vane motor. Used for measuring the rotating speed of the motor and the guide vane motor.

The utility model discloses a theory of operation as follows:

the level sensor 9 detects the level of the water source. The flow sensor 10 detects the flow rate of the centrifugal pump. The controller 1 adjusts the rotation of the motor according to the data transmitted by the liquid level sensor 9 and the flow sensor 10, the rotating speed of the impeller 4-3 is changed, and the cavitation characteristic caused to the pump body is changed; the controller 1 changes the included angles of the guide vanes 4-9 adaptively according to a preset program. The guide vane angle specifically changes the mode as follows: the guide vane motor 4-12 is driven to rotate, the guide vane disk 4-8 rotates along with the guide vane motor, one end of the guide vane 4-9 rotates along with the guide vane motor, the other end of the guide vane 4-9 slides in the guide vane connecting groove 4-7, and the angle of the guide vane 4-9 is changed. If the rotating speed of the centrifugal pump needs to be manually controlled, the adjusting switch 5 is closed, and the motor or the guide vane motor 4-12 is controlled to rotate through the control button group 6. The utility model discloses at impeller circumference installation stator subassembly, stator bending direction and impeller go up the crooked opposite direction of blade, its bending angle just in time suits with the direction that liquid flowed from the impeller, behind partial speed can first change the pressure into can the head, discharges uniformly again.

The fluid flows into the radial reverse guide vane through the impeller, and the flow state is gradually stabilized due to the flow guiding effect of the guide vane, so that the streamline distribution surface is more uniform; the flow rate is increased, the flow velocity in the flow channel inside the guide vane is increased, so that the fluid generates flow separation at the position where the curvature inside the reverse guide vane is greatly changed to induce the vortex, and the generation of the vortex is avoided, the cavitation is reduced and the long-term operation of the centrifugal pump is ensured by reducing the included angle alpha of the guide vane as shown in fig. 10-11.

The above description has been made in detail only for the preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art, and all such changes are intended to be encompassed by the present invention.

Claims (5)

1. A pump station with self-adjusting capability comprises a controller (1), a power supply module (2), a wireless communication module (3), a centrifugal pump (4), an adjusting switch (5), a control button group (6), a first motor driving module (7), a second motor driving module (8), a flow sensor (10), an emergency stop switch, a first stop valve and a second stop valve; the method is characterized in that: the power supply module (2) is connected with a power supply and supplies power to the controller (1), the wireless communication module (3), the first motor driving module (7) and the second motor driving module (8); an emergency stop switch is arranged between the power supply module (2) and the power supply; the adjusting switch (5) and the control button group (6) are connected with the controller (1); the controller (1) drives a motor through a first motor driving module (7), and the controller (1) drives the guide vane motors (4-12) through a second motor driving module (8); the water inlet of the centrifugal pump (4) is communicated with the water outlet of the first stop valve; the water inlet of the first stop valve is communicated with a water source; a flow sensor (10) is arranged at the water outlet of the centrifugal pump (4); the water outlet of the centrifugal pump (4) is communicated with the water inlet of the second stop valve; the water outlet of the second stop valve is connected with a water outlet pipeline; the controller (1) transmits the numerical value transmitted by the flow sensor (10) to the upper computer through the wireless communication module (3);

the first terminal of the first stop valve is connected with the first terminal of the second stop valve and a normally open contact of the emergency stop switch; the other normally open contact of the emergency stop switch is connected with the anode of the battery; the negative pole of the battery is connected with the second terminal of the first stop valve and the second terminal of the second stop valve; one normally closed contact of the emergency stop switch is connected with a power supply, and the other normally closed contact of the emergency stop switch is connected with the power supply module (2);

the centrifugal pump (4) comprises a pump body (4-1), a pump cover (4-2), an impeller (4-3) and a guide vane assembly; the front end of the pump body (4-1) is communicated with a water inlet (4-4), the upper end of the pump body is communicated with a water outlet (4-5), the rear end of the pump body (4-1) is hermetically connected with a pump cover (4-2), the pump body (4-1) and the pump cover (4-2) form a cavity, and a guide vane assembly and an impeller (4-3) are arranged in the cavity; the pump cover (4-2) is provided with a first groove (4-6) close to the middle of the end face of the cavity, the pump cover (4-2) is provided with a plurality of guide vane connecting grooves (4-7) close to the periphery of the end face of the cavity in the radial direction, and the guide vane connecting grooves (4-7) are distributed outside the first groove (4-6) and are not communicated with the first groove (4-6) independently; the guide vane assembly comprises a guide vane disc (4-8), guide vanes (4-9), a connecting shaft (4-10), gears (4-11) and a guide vane motor (4-12), the guide vane disc (4-8) is arranged in a first groove (4-6), a second groove (4-13) is formed in the position, close to the end face of the cavity, of the guide vane disc (4-8), guide vanes (4-9) are evenly hinged and connected to the periphery of the end face of the cavity, the number of the guide vanes (4-9) is matched with the number of the guide vane connecting grooves (4-7), sliding shafts (4-14) are arranged at the other ends of the guide vanes (4-9), the sliding shafts (4-14) are arranged in the guide vane connecting grooves (4-7) and are in sliding connection with the guide vane connecting grooves (4-7), the end face of the guide vane disk (4-8) hinged with the guide vane (4-9) and the end face of the pump cover (4-2) provided with the guide vane connecting groove (4-7) are on the same horizontal plane, the center of the guide vane disk (4-8) is connected with a connecting shaft (4-10) in a through mode, one end of the connecting shaft (4-10) is fixedly connected with the guide vane disk (4-8), the other end of the connecting shaft penetrates through the first groove (4-6) and extends out of the pump cover (4-2), a gear (4-11) is fixedly arranged at the penetrating end, the guide vane motor (4-12) is arranged out of the guide vane disk (4-2), a driving gear (4-16) is fixedly connected with the end part of a motor shaft of the guide vane motor (4-12), and the driving gear (4-16) is, the connecting shaft (4-10) is connected with the pump cover (4-2) in a rotating and sealing manner; the impeller (4-3) is arranged in the second groove (4-13), the pump shaft of the centrifugal pump penetrates through the connecting shaft (4-10) and is fixedly connected with the impeller (4-3), the motor torque is transmitted to the impeller (4-3) and drives the impeller (4-3) to rotate, and the pump shaft is in rotary sealing connection with the connecting shaft (4-10); the central axes of the impeller (4-3), the second groove (4-13), the guide vane disc (4-8), the connecting shaft (4-10), the first groove (4-6) and the gear (4-11) are collinear.

2. The pump station with self-adjustment capability according to claim 1, characterized in that: the controller employs a Siemens S7-200 series CPU226 PLC.

3. The pump station with self-adjustment capability according to claim 1, characterized in that: the guide vanes (4-9) are opposite to the bending direction of the blades in the impeller (4-3).

4. The pump station with self-adjustment capability according to claim 1, characterized in that: a first encoder is fixed at the rear end of the motor, and an input shaft of the first encoder is fixed with an output shaft of the motor; and a second encoder is fixed at the rear end of the guide vane motor, and an input shaft of the second encoder is fixed with an output shaft of the guide vane motor.

5. The pump station with self-adjustment capability according to claim 1, characterized in that: the device also comprises a liquid level sensor (9); the liquid level sensor (9) is arranged at the bottom of the water source and is connected with the controller (1).

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