阅读说明：本技术 一种三容水箱串级控制系统 (Cascade control system for three-container water tank ) 是由 张旦 其他发明人请求不公开姓名 于 2019-09-18 设计创作，主要内容包括：本发明公开了一种三容水箱串级控制系统,包括储水箱及设在储水箱上方且从下往上依次设置的下水箱、中水箱及上水箱；所述储水箱与上水箱之间通过进水管相连通且进水管上设有用于将储水箱中的水送至上水箱的水泵,所述水泵的进液端与储水箱之间设有电磁阀Ⅰ、出液端与上水箱之间依次设有电磁阀Ⅱ及电磁阀Ⅲ,所述电磁阀Ⅱ与电磁阀Ⅲ之间设有电动调节阀；该系统还包括用于给各用电部件供电的电源。本发明对进入副回路的扰动的克服能力较强,提高其稳定性及工作可靠度,并且能够使用新能源作为供电电源,符合节能环保的社会需求。(The invention discloses a cascade control system of three water tanks, which comprises a water tank, a lower water tank, a middle water tank and an upper water tank, wherein the lower water tank, the middle water tank and the upper water tank are arranged above the water tank and are sequentially arranged from bottom to top; the water storage tank is communicated with the upper water tank through a water inlet pipe, the water inlet pipe is provided with a water pump for delivering water in the water storage tank to the upper water tank, a solenoid valve I is arranged between the liquid inlet end of the water pump and the water storage tank, a solenoid valve II and a solenoid valve III are sequentially arranged between the liquid outlet end of the water pump and the upper water tank, and an electric regulating valve is arranged between the solenoid valve II and the solenoid valve III; the system also includes a power supply for supplying power to the electrical components. The invention has stronger capability of overcoming the disturbance entering the secondary loop, improves the stability and the working reliability, can use new energy as a power supply and meets the social requirements of energy conservation and environmental protection.)

1. The utility model provides a three hold water tank cascade control system which characterized in that: comprises a water storage tank, and a lower water tank, a middle water tank and an upper water tank which are arranged above the water storage tank and are sequentially arranged from bottom to top; the water storage tank is communicated with the upper water tank through a water inlet pipe, the water inlet pipe is provided with a water pump for delivering water in the water storage tank to the upper water tank, a solenoid valve I is arranged between the liquid inlet end of the water pump and the water storage tank, a solenoid valve II and a solenoid valve III are sequentially arranged between the liquid outlet end of the water pump and the upper water tank, and an electric regulating valve is arranged between the solenoid valve II and the solenoid valve III;

the upper water tank is communicated with the middle water tank through a first water outlet pipe, an electromagnetic valve IV is arranged on the first water outlet pipe, the middle water tank is communicated with the lower water tank through a second water outlet pipe, an electromagnetic valve V is arranged on the second water outlet pipe, the lower water tank is communicated with the water storage tank through a third water outlet pipe, and an electromagnetic valve VI is arranged on the third water outlet pipe;

the upper water tank is communicated with the water storage tank through a first overflow pipe, the first overflow pipe is provided with a solenoid valve VII, the middle water tank is communicated with the water storage tank through a second overflow pipe, the second overflow pipe is provided with a solenoid valve VIII, the lower water tank is communicated with the water storage tank through a third overflow pipe, and the third overflow pipe is provided with a solenoid valve IX;

a water level sensor I for detecting the water level in the tank in real time is arranged in the upper water tank, a water level sensor II for detecting the water level in the tank in real time is arranged in the middle water tank, and a water level sensor III for detecting the water level in the tank in real time is arranged in the lower water tank;

the water pump, the electric regulating valve, the solenoid valve I, the solenoid valve II, the solenoid valve III, the solenoid valve IV, the solenoid valve V, the solenoid valve VI, the solenoid valve VII, the solenoid valve VIII, the solenoid valve IX, the water level sensor I, the water level sensor II and the water level sensor III are respectively connected with a controller, and the controller is connected with an upper computer;

the system also comprises a power supply for supplying power to each electric component, wherein the power supply comprises a direct current-to-alternating current converter, a storage battery, a lithium battery and wind power generation equipment, the alternating current output end of the direct current-to-alternating current converter is respectively connected with a water pump, an electric regulating valve, a solenoid valve I, a solenoid valve II, a solenoid valve III, a solenoid valve IV, a solenoid valve V, a solenoid valve VI, a solenoid valve VII, a solenoid valve VIII, a solenoid valve IX, a water level sensor I, a water level sensor II, a water level sensor III, a controller and the electric energy input end of an upper computer, a storage battery and a lithium battery are connected with the direct current input end of the direct current-to-alternating current converter through a switch, the switch is used for switching and selecting any one of the storage battery and the lithium battery to be connected with, the storage battery is connected with the wind power generation equipment and is used for storing electric energy generated by the wind power generation equipment.

2. The cascade control system of three water tanks according to claim 1, wherein: the first overflow pipe, the second overflow pipe and the third overflow pipe are all connected to a total overflow pipe, and the total overflow pipe is communicated with the water storage tank.

3. The cascade control system of three water tanks according to claim 2, wherein: the water pump is of a magnetic force driving pump structure.

4. The cascade control system of three water tanks according to claim 3, wherein: wind power generation equipment includes aerogenerator, electricity generation main shaft, flabellum and bracing piece, bracing piece top fixedly connected with aerogenerator, aerogenerator's output fixedly connected with electricity generation main shaft, electricity generation main shaft fixedly connected with flabellum, electricity generation main shaft outer wall sliding connection has the damping disk, electricity generation main shaft outer wall fixedly connected with fixed disk, the damping disk lateral wall passes through connecting rod and flabellum sliding connection, be equipped with main damping spring between damping disk and the fixed disk, damping spring before being equipped with between connecting rod and the flabellum, damping disk lateral wall fixedly connected with tripod, tripod top fixedly connected with apex protective sheath, the fixed cover has the flabellum in the apex protective sheath.

5. The cascade control system of three water tanks according to claim 4, wherein: the blade tip protective sheath is characterized in that slots are formed in the end portions of the blades, inserting plates are fixedly connected to the inner wall of the blade tip protective sheath, and the inserting plates are inserted into the slots and are fixedly connected.

6. The cascade control system of three water tanks according to claim 5, wherein: the tripod bottom fixedly connected with buffering post, sliding connection has the flexible post of buffering in the buffering post, the flexible post tip fixedly connected with buffering contact of buffering, be equipped with the contact spring between buffering post and the flexible post of buffering.

7. The cascade control system of three water tanks according to claim 6, wherein: the tripod tip fixedly connected with connects the sudden strain of a muscle ware, the sudden strain of a muscle ware passes through tripod internal line and is connected with ground connection circuit.

8. The cascade control system of three water tanks according to claim 7, wherein: the main damping spring is sleeved on the outer wall of the main shaft, the front damping spring is sleeved on the outer wall of the connecting rod, and the inner wall of the damping disc is fixedly connected with an extension sliding cylinder; a tripod is arranged behind each fan blade, and the blade tip protective sleeve is a metal sleeve.

Technical Field

The invention relates to the field of liquid level and flow control, in particular to a cascade control system of three water tanks.

Background

People's life and industrial production often involve the control problem of liquid level and flow, for example, beverage, food processing, the supply of domestic water, solution filtration, sewage treatment, chemical production and other production processes in various industries usually use liquid storage tanks. The liquid level in the liquid storage tank needs to be maintained at a proper height, the liquid level is too full and is easy to overflow to cause waste, and the liquid level in the liquid storage tank cannot meet the requirement if the liquid level is too little; therefore, a proper control system needs to be designed to automatically adjust the inlet and outlet flow of the liquid storage tank, so that the liquid level in the liquid storage tank keeps normal level, and the quality and the production benefit of products are ensured; the practical problems of different backgrounds can be simplified into the problem of liquid level control of a certain water tank, so that the liquid level is an important parameter in the industrial control process, and particularly, the liquid level can be detected and controlled by adopting a proper method under a dynamic state, so that a good production effect can be achieved.

At present, a three-water-tank control system is widely applied to computer control system experiments and industrial experiments in universities and colleges, so that research and development of the three-water-tank control system are rapidly developed, but most of the conventional systems have weak capacity of overcoming disturbance entering a secondary loop, insufficient stability and low working reliability; meanwhile, under the condition that an experimental base is provided with various new energy sources (including solar energy, wind energy and the like), the control system also singly uses commercial power as a power supply, and the social requirements of energy conservation and environmental protection are not met.

Disclosure of Invention

In view of this, the present invention provides a cascade control system for three water tanks, which has a strong ability to overcome the disturbance entering the secondary loop, improves the stability and the working reliability, and can use new energy as a power supply, thereby meeting the social requirements of energy saving and environmental protection.

The invention provides a cascade control system of three water tanks, which comprises a water tank, a lower water tank, a middle water tank and an upper water tank, wherein the lower water tank, the middle water tank and the upper water tank are arranged above the water tank and are sequentially arranged from bottom to top; the water storage tank is communicated with the upper water tank through a water inlet pipe, the water inlet pipe is provided with a water pump for delivering water in the water storage tank to the upper water tank, a solenoid valve I is arranged between the liquid inlet end of the water pump and the water storage tank, a solenoid valve II and a solenoid valve III are sequentially arranged between the liquid outlet end of the water pump and the upper water tank, and an electric regulating valve is arranged between the solenoid valve II and the solenoid valve III;

the upper water tank is communicated with the middle water tank through a first water outlet pipe, an electromagnetic valve IV is arranged on the first water outlet pipe, the middle water tank is communicated with the lower water tank through a second water outlet pipe, an electromagnetic valve V is arranged on the second water outlet pipe, the lower water tank is communicated with the water storage tank through a third water outlet pipe, and an electromagnetic valve VI is arranged on the third water outlet pipe;

the upper water tank is communicated with the water storage tank through a first overflow pipe, the first overflow pipe is provided with a solenoid valve VII, the middle water tank is communicated with the water storage tank through a second overflow pipe, the second overflow pipe is provided with a solenoid valve VIII, the lower water tank is communicated with the water storage tank through a third overflow pipe, and the third overflow pipe is provided with a solenoid valve IX;

a water level sensor I for detecting the water level in the tank in real time is arranged in the upper water tank, a water level sensor II for detecting the water level in the tank in real time is arranged in the middle water tank, and a water level sensor III for detecting the water level in the tank in real time is arranged in the lower water tank;

the water pump, the electric regulating valve, the solenoid valve I, the solenoid valve II, the solenoid valve III, the solenoid valve IV, the solenoid valve V, the solenoid valve VI, the solenoid valve VII, the solenoid valve VIII, the solenoid valve IX, the water level sensor I, the water level sensor II and the water level sensor III are respectively connected with a controller, and the controller is connected with an upper computer;

the system also comprises a power supply for supplying power to each electric component, wherein the power supply comprises a direct current-to-alternating current converter, a storage battery, a lithium battery and wind power generation equipment, the alternating current output end of the direct current-to-alternating current converter is respectively connected with a water pump, an electric regulating valve, a solenoid valve I, a solenoid valve II, a solenoid valve III, a solenoid valve IV, a solenoid valve V, a solenoid valve VI, a solenoid valve VII, a solenoid valve VIII, a solenoid valve IX, a water level sensor I, a water level sensor II, a water level sensor III, a controller and the electric energy input end of an upper computer, a storage battery and a lithium battery are connected with the direct current input end of the direct current-to-alternating current converter through a switch, the switch is used for switching and selecting any one of the storage battery and the lithium battery to be connected with, the storage battery is connected with the wind power generation equipment and is used for storing electric energy generated by the wind power generation equipment.

Preferably, the first overflow pipe, the second overflow pipe and the third overflow pipe are all connected to a total overflow pipe, and the total overflow pipe is communicated with the water storage tank.

Preferably, the water pump is a magnetic drive pump structure.

Preferably, wind power generation equipment includes aerogenerator, electricity generation main shaft, flabellum and bracing piece, bracing piece top fixedly connected with aerogenerator, aerogenerator's output fixedly connected with electricity generation main shaft, electricity generation main shaft fixedly connected with flabellum, electricity generation main shaft outer wall sliding connection has the damping disk, electricity generation main shaft outer wall fixedly connected with fixed disk, the damping disk lateral wall passes through connecting rod and flabellum sliding connection, be equipped with main damping spring between damping disk and the fixed disk, be equipped with preceding damping spring between connecting rod and the flabellum, damping disk lateral wall fixedly connected with tripod, tripod top fixedly connected with apex protective sheath, fixed cover has the flabellum in the apex protective sheath.

Preferably, the tip of the fan blade is provided with a slot, the inner wall of the tip protecting sleeve is fixedly connected with a plug board, and the plug board is inserted into the slot and is fixedly connected with the slot.

Preferably, tripod bottom fixedly connected with buffering post, sliding connection has the flexible post of buffering in the buffering post, the flexible post tip fixedly connected with buffering contact of buffering, be equipped with the contact spring between buffering post and the flexible post of buffering.

Preferably, tripod tip fixedly connected with connects the arrester, the arrester passes through tripod internal line and is connected with ground connection circuit.

Preferably, the main damping spring is sleeved on the outer wall of the main shaft, the front damping spring is sleeved on the outer wall of the connecting rod, and the inner wall of the damping disc is fixedly connected with the extension sliding cylinder; a tripod is arranged behind each fan blade, and the blade tip protective sleeve is a metal sleeve.

The invention has the beneficial effects that:

firstly, according to the cascade control system of the three-water-containing tank, the relevant electromagnetic valves are arranged on the two sides of the water pump and the electric regulating valve, meanwhile, the relevant electromagnetic valves are additionally arranged on the overflow pipe, and through the detection of the relevant water level sensors and the processing of the controller, the feedback control can be timely and effectively carried out, so that the system has stronger overcoming capacity on disturbance entering the secondary loop, and the stability and the working reliability of the system are improved; and various complex disturbance experiments can be realized, and a good platform is provided for the research of the control algorithm.

And secondly, the power supply adopts two power supply modes of a storage battery and a lithium battery, the storage battery is convenient to realize power supply through wind energy, and the lithium battery is used as a standby battery to supply power in case of insufficient wind power or extreme conditions, so that the lithium battery is suitable for normal power supply when being separated from commercial power.

Thirdly, in the wind power generation equipment, the tripod is arranged behind the fan blades, after the fan blades generate vibration by blowing, the vibration is transmitted to the tripod at the rear part, the damping disc is enabled to move forward or backward to a certain extent, the main damping spring at the rear part of the fan blades is squeezed or the front damping spring at the front part is squeezed through the damping disc, the vibration is absorbed, the slight deformation of the fan blades is generated, the buffering contact at the rear part of the fan blades is contacted with the fan blades, the buffering telescopic column is squeezed and retracted in the buffering column, the contact spring is compressed, part of vibration is absorbed, the deformation of the fan blades is relieved and protected, and the firm supporting effect of the tripod is added, so that the fan blades cannot be bent, huge deformation is generated, the damage of the fan blades is caused, and the vibration of the fan blades is absorbed by the tripod.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a functional block diagram of the power supply of the present invention;

FIG. 3 is a schematic view of a wind power plant according to the present invention from a first perspective;

FIG. 4 is a schematic view of a second perspective of the wind power plant of the present invention;

FIG. 5 is a third perspective view of the wind power plant of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the following detailed description of the present invention is provided with reference to the accompanying drawings and specific examples.

As shown in fig. 1: the cascade control system for the three water tanks provided by the embodiment comprises a water tank 1, and a lower water tank 21, a middle water tank 22 and an upper water tank 23 which are arranged above the water tank 1 and are sequentially arranged from bottom to top; the water storage tank 1 is communicated with the upper water tank 23 through a water inlet pipe 3, the water inlet pipe 3 is provided with a water pump 4 for delivering water in the water storage tank 1 to the upper water tank 23, an electromagnetic valve I51 is arranged between the liquid inlet end of the water pump 4 and the water storage tank 1, an electromagnetic valve II 52 and an electromagnetic valve III 53 are sequentially arranged between the liquid outlet end and the upper water tank 23, and an electric regulating valve 6 is arranged between the electromagnetic valve II 52 and the electromagnetic valve III 53; the liquid level of the lower water tank 21 is the main control quantity of the system, and the liquid levels of the other two water tanks are the auxiliary control quantities.

The water pump 4 is preferably of a magnetic force driving pump structure, the magnetic force driving pump consists of a pump, a magnetic driver and a motor, the key part of the magnetic driver consists of an outer magnetic rotor, an inner magnetic rotor and a non-magnetic isolating sleeve, when the motor drives the outer magnetic rotor to rotate, magnetic field can penetrate through an air gap and a non-magnetic substance to drive the inner magnetic rotor connected with an impeller to synchronously rotate, the non-contact transmission of power is realized, and dynamic seal is converted into static seal; the electric control valve 6 adopts an intelligent straight-stroke electric valve structure and is used for adjusting the flow of the control loop; each solenoid valve serves as a bypass of the electric control valve 6 and can perform a step disturbance function.

The upper water tank 23 is communicated with the middle water tank 22 through a first water outlet pipe 71, an electromagnetic valve IV 54 is arranged on the first water outlet pipe 71, the middle water tank 22 is communicated with the lower water tank 21 through a second water outlet pipe 72, an electromagnetic valve V55 is arranged on the second water outlet pipe 72, the lower water tank 21 is communicated with the water storage tank 1 through a third water outlet pipe 73, and an electromagnetic valve VI 56 is arranged on the third water outlet pipe 73; the upper water tank 23 is communicated with the water storage tank 1 through a first overflow pipe 81, an electromagnetic valve VII 57 is arranged on the first overflow pipe 81, the middle water tank 22 is communicated with the water storage tank 1 through a second overflow pipe 82, an electromagnetic valve VIII 58 is arranged on the second overflow pipe 82, the lower water tank 21 is communicated with the water storage tank 1 through a third overflow pipe 83, and an electromagnetic valve IX 59 is arranged on the third overflow pipe 83; preferably, the first overflow pipe 81, the second overflow pipe 82 and the third overflow pipe 83 are all connected to a total overflow pipe 84, and the total overflow pipe 84 is communicated with the water storage tank 1, so as to simplify the system arrangement; a water level sensor I91 for detecting the water level in the tank in real time is arranged in the upper water tank 23, a water level sensor II 92 for detecting the water level in the tank in real time is arranged in the middle water tank 22, and a water level sensor III 93 for detecting the water level in the tank in real time is arranged in the lower water tank 21; each level sensor may be a level transmitter configuration or a pressure transmitter configuration.

In the embodiment, the water pump 4, the electric regulating valve 6, the solenoid valve I51, the solenoid valve II 52, the solenoid valve III 53, the solenoid valve IV 54, the solenoid valve V55, the solenoid valve VI 56, the solenoid valve VII 57, the solenoid valve VIII 58, the solenoid valve IX 59, the water level sensor I91, the water level sensor II 92 and the water level sensor III 93 are respectively connected with a controller 101, and the controller 101 is connected with an upper computer 102; the controller 101 may be, for example, a PLC (programmable logic controller), and the PLC processes data by using a PID operation mode, and has a simple structure, good stability, reliable operation, and convenient adjustment; the upper computer 102 can be a PC (personal computer), for example, the upper computer 102 is also configured through configuration king, can be intelligently controlled and displayed, greatly reduces resource waste, and can be displayed through the upper computer, so that management and operation are facilitated; the controller 101 can be connected with an upper computer through a PC/PPI cable, so that the communication effectiveness is ensured.

As shown in fig. 2, the system further includes a power supply for supplying power to each electric component, the power supply includes a dc-to-ac converter 11, a storage battery 12, a lithium battery 13 and a wind power generation device 14, an ac output end of the dc-to-ac converter 11 is connected to the water pump 4, the electric control valve 6, the electromagnetic valve i 51, the electromagnetic valve ii 52, the electromagnetic valve iii 53, the electromagnetic valve iv 54, the electromagnetic valve v 55, the electromagnetic valve vi 56, the electromagnetic valve vii 57, the electromagnetic valve viii 58, the electromagnetic valve ix 59, the water level sensor i 91, the water level sensor ii 92, the water level sensor iii 93, the controller 101 and an electric energy input end of the host computer 102 through corresponding wires, the storage battery 12 and the lithium battery 13 are connected to a dc input end of the dc-to-ac converter 11 through a switch 15, the switch 15 is used for switching and selecting any one of the storage battery 12 and the lithium battery 13 to be connected to the dc, the battery 12 is connected to the wind power plant 14 and serves to store the electrical energy generated by the wind power plant 14. The storage battery 12 and the lithium battery 13 can be independently arranged outside the water storage tank 1; the lithium battery 30 is of a replaceable construction. Through two kinds of power supply modes of battery 12 and lithium cell 13, battery 12 is convenient for realize the power supply through the wind energy, and lithium cell 13 is emergent power supply under insufficient wind energy or extreme condition as backup battery, is applicable to the normal power supply when breaking away from the commercial power. Wherein the lithium battery 13 can be charged using the mains.

As shown in fig. 3-5, the wind power generation device 14 includes a wind power generator 1401, a power generation main shaft 1402, a fan blade 1403 and a support rod 1404, the top end of the support rod 1404 is fixedly connected with the wind power generator 1401, the output end of the wind power generator 1401 is fixedly connected with the power generation main shaft 1402, the power generation main shaft 1402 is fixedly connected with the fan blade 1403, the outer wall of the power generation main shaft 1402 is slidably connected with a damping disk 1405, the outer wall of the power generation main shaft 1402 is fixedly connected with a fixing disk 1406, the side wall of the damping disk 1405 is slidably connected with the fan blade 1403 through a connecting rod 1407, a main damping spring 1408 is connected between the damping disk 1405 and the fixing disk 1406, a front damping spring 1409 is connected between the connecting rod 1407 and the fan blade 1403, the side wall of the damping. The entire wind power generation plant 140 is erected outdoors; the wind power generator 1401 is electrically connected to the storage battery 12 in a detachable manner.

Wherein, a slot 1412 is formed at the end of the fan blade 1403, an inserting plate 1413 is fixedly connected to the inner wall of the blade tip protecting cover 1411, and the inserting plate 1413 is inserted into the slot 1412 and is fixedly connected. The bottom of the triangular support 1410 is fixedly connected with a buffering column 1414, the buffering column 1415 is slidably connected in the buffering column 1414, the end of the buffering column 1415 is fixedly connected with a buffering contact 1416, and a contact spring 1417 is fixedly connected between the buffering column 1414 and the buffering column 1415. The end of the tripod 1410 is fixedly connected with a lightning receptor 1418, and the lightning receptor 1418 is connected with a grounding circuit through the internal circuit of the tripod 1410. The main damping spring 1408 is sleeved on the outer wall of the main shaft, the front damping spring 1409 is sleeved on the outer wall of the connecting rod 1407, and the inner wall of the damping disk 1405 is fixedly connected with the extension sliding cylinder 1419. A tripod 1410 is arranged behind each fan blade 1403, and the blade tip protective sleeve 1411 is a metal sleeve.

In this wind power generation apparatus 140, by a tripod 1410 provided behind the fan blades 1403, when the fan 1403 blows to generate vibration, the vibration is transmitted to the tripod 1410 at the rear of the fan, so that the damping disk 1405 moves forwards or backwards to a certain extent, the shock is absorbed by the damping disk 1405 pressing against the main damping spring 1408 behind it or against the front damping spring 1409 in front, the slight deformation of the fan blades 1403, since the buffer contact 1416 behind the fan blade 1403 is in contact with the fan blade, the buffer telescopic column 1415 is squeezed and retracted into the buffer column 1414, the contact spring 1417 is compressed, absorbs a part of the vibration, slows down the deformation of the fan blade 1403, protects the fan blade 1403, and the stable supporting function of the tripod 1410 is added, so that the fan blade 1403 is not bent and greatly deformed, and the fan blade 1403 is damaged, through the action of the tripod 1410 and the sets of springs thereon, the vibration of the fan blades 1403 is absorbed, the support is strengthened, and the fan blades 1403 and the power generation equipment are protected. In thunderstorm weather, through the fragile apex of apex protection cover 1411 protection that is equipped with, lightning is led to ground through the grounding line through the arrester 1418 of tripod 1410 tip, prevents that flabellum 1403 from being struck by lightning and damaging, and is grounded through tripod 1410, guides the thunder and lightning, rather than flabellum 1403 body connects and draws, has reduced flabellum 1403 and has damaged the risk.

Finally, the principle and embodiments of the present invention are explained by using specific examples, and the above descriptions of the examples are only used to help understand the core idea of the present invention, and the present invention can be modified and modified without departing from the principle of the present invention, and the modified and modified examples also fall into the protection scope of the present invention.