CN110825127A

CN110825127A - Safe and reliable's intelligent electronic type vacuum drainage controller

Info

Publication number: CN110825127A
Application number: CN201911234881.2A
Authority: CN
Inventors: 沙澄清
Original assignee: Shaoxing Zaifeng Intelligent Technology Co Ltd
Current assignee: Shaoxing Zaifeng Intelligent Technology Co Ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-02-21

Abstract

The invention relates to a safe and reliable intelligent electronic type vacuum water-leading controller, which comprises a flow switch device and a water level detection device, wherein the flow switch device is used for automatically controlling the opening of a pump station main unit according to the flow velocity of fluid in a vacuum pipeline in a pump station; the flow switch device comprises a Wheatstone bridge detection unit and a microprocessing unit, the Wheatstone bridge detection unit converts the flow velocity of fluid in a vacuum pipeline in the pump station into a voltage signal, and the microprocessing unit sends a starting signal to a starting loop of the pump station main unit when the voltage signal reaches a preset voltage threshold. The invention can timely supplement water when the vacuum pump is lack of water, accurately measure the liquid flow value in the vacuum pipeline and judge the vacuum degree, so as to correctly send out a starting instruction and avoid misoperation and operation failure.

Description

Safe and reliable's intelligent electronic type vacuum drainage controller

Technical Field

The invention relates to the technical field of vacuum drainage controllers, in particular to a safe and reliable intelligent electronic type vacuum drainage controller.

Background

With the continuous improvement of the technical level in each field, the rapid development of the pump station technology is promoted. The existing pump station is separated from the traditional rough management mode and is developing towards automation, safety, reliability and energy conservation. Therefore, the control technology of the pump station is required to have a real practical promotion. The automatic vacuumizing starting system of the centrifugal pump station unit is the most important example. Before the centrifugal pump is started, the water inlet channel and the pump body are filled with water, continuous water flow from the water inlet to the water outlet of the pump is formed under the action of centrifugal force generated by rotation of the impeller, and the centrifugal pump enters a normal operation process after the starting process of the centrifugal pump is finished. Generally, most pump stations adopt a starting method that a vacuum pipeline is additionally provided with a vacuum water diversion controller and a main motor control switch of a unit are linked.

Although the existing centrifugal machine has a certain degree of automation in starting, the actual working effect of the pump station is influenced due to the structural characteristics and the requirements of the precision and the reliability of the whole system. Specifically, because the pump body is internally provided with water with a certain height before the vacuum pump works, the centrifugal pump forms a water ring on the wall of the pump body under the action of centrifugal force generated by the rotation of the impeller, so that the centrifugal pump can continuously and uniformly move to the air inlet pipe to transfer gas to the air outlet pipe for discharge. Since water heats up during operation and some water is discharged together with gas, cold water needs to be continuously replenished during operation to cool and replenish the water consumed in the pump. In order to ensure the tightness of the rotating part of the vacuum pump and prevent external air from entering the pump and gas in the pump from going out, a stuffing box is arranged between the shaft sleeve and the tile frame, stuffing is filled in the stuffing box, and clean cold water is needed for lubrication and cooling. Once the vacuum pump is started by sewage or water supply is interrupted, the impeller and the filler of the vacuum pump are damaged, the vacuum pump cannot be vacuumized or the filler is damaged and leaks air, so that the unit cannot be started.

In addition, the existing vacuum water diversion controller also has the problem of misoperation of the vacuum critical point water diversion controller or operation rejection after vacuum forming. The vacuum water-leading controller is mainly structurally characterized in that a reed pipe node and a magnetic float are arranged in a metal pipe, when gas exists in a pump body and a pipeline, the float does not move at the moment, and the inner contact of the reed pipe is in a normally open state. When the pump body and the pipeline are filled with water and air is discharged, the vacuum water diversion controller is filled with water, the buoy floats at the moment, the normally open contact of the reed switch is closed, a starting signal is sent out, and the host unit is started. When the critical point of vacuum is about to be reached in the water pump, a gas-water mixture in the pipeline enters the vacuum water diversion controller, the inner floater is lifted, the water diversion contact is connected, vacuum forming is started, the electric appliance is started, the starting loop of the main unit is further connected, the main unit is started by mistake under the condition of incomplete vacuum, and the water pump cannot discharge water, so that the starting times of the unit are increased, and the success rate of automatic starting is reduced; the float in the vacuum water diversion controller cannot float due to overlong service time, internal corrosion and sundries blockage, and a water diversion contact cannot be closed after vacuum is formed, so that the vacuum water diversion controller cannot be started normally.

Based on this, the automatic starting system of the existing centrifugal pump has certain defects and needs to be improved so as to meet the requirements of stable system, reliable work and convenient and fast operation.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a safe and reliable intelligent electronic vacuum drainage controller, which can be used for timely supplementing water when a vacuum pump is in water shortage, accurately measuring the liquid flow value in a vacuum pipeline and judging the vacuum degree so as to correctly send a starting instruction and avoid misoperation and refusal.

In order to achieve the above object, the present invention has the following configurations:

the invention provides a safe and reliable intelligent electronic type vacuum water-leading controller, which comprises a flow switch device and a water level detection device, wherein the flow switch device is used for automatically controlling the opening of a pump station main unit according to the flow velocity of fluid in a vacuum pipeline in a pump station;

the flow switch device comprises a Wheatstone bridge detection unit and a microprocessing unit, the Wheatstone bridge detection unit converts the flow velocity of fluid in a vacuum pipeline in the pump station into a voltage signal, and the microprocessing unit sends a starting signal to a starting loop of the pump station main unit when the voltage signal reaches a preset voltage threshold;

the water level detection device comprises an electronic water level meter and a water level control unit, the electronic water level meter detects the water level of the gas-liquid separator in the pump station, the water level control unit reads the detection data of the electronic water level meter, and when the water level data is smaller than a preset water level threshold value, the electromagnetic valve of the water inlet pipeline of the gas-liquid separator is controlled to be opened to supplement water.

Optionally, the wheatstone bridge includes a first resistor, a second resistor, a third resistor, a fourth resistor, and a heating element, the first resistor and the second resistor are thermistors, the heating element heats the second resistor, the first resistor and the third resistor are connected in series and then connected in parallel with the second resistor and the fourth resistor, and the fluid state in the vacuum pipeline is detected by detecting a temperature difference between the first resistor and the second resistor.

Optionally, a node C is located between the first resistor and the third resistor, a node B is located between the second resistor and the fourth resistor, the node C and the node B are respectively connected to two input ends of an amplifier, and an output end of the amplifier is connected to an input end of the microprocessor after passing through the analog-to-digital converter.

Optionally, the electronic water level gauges are an electrode type water level switch, a hanging rope type water level switch and a capacitance type electronic water level switch.

Optionally, the electronic water level gauge is an electrode type water level switch, the electrode type water level switch includes a first detection electrode, a second detection electrode and a third detection electrode, the first detection electrode, the second detection electrode and the third detection electrode are respectively disposed at different heights inside the gas-liquid separator, and the heights are sequentially raised, the water level control unit controls the electromagnetic valve of the water inlet pipeline of the gas-liquid separator to open for water replenishment when determining that the water level is lower than the second detection electrode according to the output data of the electronic water level gauge, controls the electromagnetic valve of the water inlet pipeline of the gas-liquid separator to close for water replenishment when determining that the water level is higher than the third detection electrode according to the output data of the electronic water level gauge, and stops the water replenishment, and the water level control unit determines that the water level is lower than the first electrode according to the output data of the electronic water level gauge, and controlling a vacuum pump control loop of the pump station to be disconnected, so that the vacuum pump stops running.

Optionally, the first detecting electrode, the second detecting electrode and the third detecting electrode are made of stainless steel round steel, and the first detecting electrode, the second detecting electrode and the third detecting electrode are fixed on the gas-liquid separator through an insulating plate respectively.

Optionally, the water level control unit includes nine terminals, a first terminal, a seventh terminal and an eighth terminal are respectively connected to the first detecting electrode, the second detecting electrode and the third detecting electrode, the second terminal and the fourth terminal are normally open points of the first relay, control the electromagnetic valve of the water inlet pipeline of the gas-liquid separator, the third terminal and the ninth terminal are normally open points of the second relay, control the vacuum pump control circuit, and the fifth terminal and the sixth terminal are connected to the power supply.

Optionally, the second relay is connected in series in the vacuum pump control circuit.

Optionally, the flow switching device further includes a delay control module and an output control module;

when the micro-processing unit acquires a voltage signal output by the analog-to-digital converter, whether the voltage signal reaches a preset threshold value is judged, if the voltage signal does not reach the preset threshold value, the micro-processing unit controls the delay control module to start timing, the timing range is within, the micro-processing unit does not send a control signal to the output control module, the micro-processing unit judges that when the voltage signal is lower than the preset threshold value, the delay control module is controlled to stop timing and clear the timing, when the timing of the delay control module reaches the preset time threshold value, the micro-processing unit sends a control signal to the output control module, the output control module sends a starting signal to an automatic starting loop of a host unit of a pump station, and the host unit is started.

Optionally, the working power supply of the flow switching device is connected to the solenoid valve coil of the vacuum pipeline, and the flow switching device is connected in parallel with the solenoid valve coil of the vacuum pipeline.

Therefore, the invention adopts the electronic technology, the electronic water level meter is arranged on the gas-liquid separator of the vacuum pump according to the conditions required by the starting operation of the vacuum pump, the water inlet electromagnetic valve and the starting loop of the vacuum pump are controlled, the water is timely supplemented when the vacuum pump is in water shortage, and the vacuum pump is stopped when the gas-liquid separator is monitored and controlled to be unable to supplement water within the set time; the vacuum drainage controller has the advantages that the liquid flow value in the vacuum pipeline is accurately measured, the vacuum degree is judged, so that a starting instruction is correctly sent, and misoperation and refusal are avoided, so that the vacuum drainage controller is high in sensitivity, convenient to install, good in popularization and accurate in vacuum critical point control.

Drawings

FIG. 1 is a block diagram of a safe and reliable intelligent electronic vacuum drainage controller according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a water level control unit according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an electronic water level gauge according to an embodiment of the present invention;

fig. 4 is a schematic circuit diagram of a detection unit of a flow switch device according to an embodiment of the invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In some instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the invention.

In order to realize accurate water level measurement, the invention is additionally provided with an accurate water level detection device. Because the structure and the system composition of the vacuum pump are limited, the water supplement of the vacuum pump only depends on the vacuum liquid separator, the vacuum liquid separator is a closed metal container, the lower part of the vacuum liquid separator is led out of a water inlet pipeline of the vacuum pump, and the upper part of the vacuum liquid separator is provided with a water outlet pipeline and an exhaust pipeline of the vacuum pump. Therefore, the water level measurement is preferably mounted on the vacuum liquid separator. Because the traditional water level measuring device mostly works by matching the floating magnetic steel with the reed pipe, the purpose of detecting the water level is achieved. However, because the vacuum air-liquid separator has a small volume, and the outlet of the vacuum pump is connected with the vacuum liquid separator, the air-water mixture generated in the vacuum process continuously impacts the liquid level and the floater to enable the floater to bounce up and down, so that inaccurate measurement and fluctuation control are caused, the vacuum system cannot work normally, and even the vacuum pump motor is repeatedly started to impact the system, so that the service life of the unit is influenced. Therefore, a water level control system with high detection sensitivity, stable and reliable work, strong anti-interference capability, simple structure and strong corrosion resistance must be matched. Therefore, the electronic water level meter is added. The electronic water level meter has the advantages of small volume, compact structure, wide installation and use range, high sensitivity, stable and reliable work, high safety factor and the like. Therefore, the centrifugal pump is suitable for being installed on a gas-liquid separator of a vacuum pump and is used as a component of a starting system of the centrifugal pump for vacuum pumping.

The relay in the electronic water level meter can output switching value to control the electromagnetic valve in the water inlet pipeline of the gas-liquid separator, the vacuum pump in the vacuum pump control loop is started, water is supplemented in time when the water shortage condition is reached, the vacuum pump is stopped when the water shortage condition is not supplemented for a period of time, and the water for lubricating and cooling the vacuum pump is effectively ensured.

The vacuum water-guiding controller has the main task of judging the water filling state in the water pump, so that the water filling state in the water pump can be converted into the liquid flow in the vacuum pipeline. When the water pump is not full of water, air flows in the pipeline; when the water pump is full of water, the water flows in the vacuum pipeline. Because of the structure of the water pump, the pipeline installation and other reasons, the water pump is in the process of vacuumizing, the air in the environment enters the pump body along the sealing position of the water pump and the leakage position of the pipeline, and the extracted air quantity is larger than the leaked air quantity, so the air in the pump body is gradually reduced, and the water is gradually increased. If the water pump is started at the moment, the water pump cannot normally discharge water after running, and the unit is failed to start. This is why the prior art water pump assembly is prone to start-up failure.

As shown in fig. 1, based on the idea of classifying the degree of vacuum in the water pump into the flow of water in the vacuum pipeline and the idea of performing water level detection on the gas-liquid separator, the invention provides a safe and reliable intelligent electronic vacuum diversion controller, which comprises a flow switch device and a water level detection device, wherein the flow switch device is used for automatically controlling the opening of a pump station main unit according to the flow velocity of fluid in the vacuum pipeline in a pump station, and the water level detection device is used for detecting the water level at the gas-liquid separator in the pump station and controlling an electromagnetic valve of a water inlet pipeline of the gas-liquid separator according to the water level detection result;

Therefore, the invention can reliably detect and reflect the water filling condition of the vacuum pump, can have the functions of controlling the vacuum gas-liquid separator to automatically supply water at a low water level and automatically cut off water at a high water level, and can cut off the control loop of the vacuum pump under the condition of the low water level. Therefore, the water level detection device is reliable in operation, and high in safety factor, and the characteristics of high corrosion resistance and high anti-interference capability are required to be met.

In this embodiment, the electronic level gauges are an electrode type level switch, a hanging rope type level switch, and a capacitance type electronic level switch. The suspension rope type water level switch utilizes the principle that a diaphragm drives a contact, when the water level reaches an action water level, a rubber film is pressed to drive the diaphragm to act, the diaphragm is changed from a normally open state to a normally closed state, a sampling circuit is switched on, a signal is subjected to special rectification filtering processing and amplification to be changed into a strong pulse, the strong pulse enters a built-in micro-processing system, a switching signal is sent, and a peripheral circuit is driven through a relay or a triode. The hanging rope type water level switch has the characteristics that: the water-based paint has the characteristics of stain resistance, inclination and shake resistance, acid and alkali resistance, magnetic field influence resistance, metal body influence resistance, water pressure change influence resistance, light influence resistance, no blind area, no movable part outside and floating object influence resistance. However, the general cost is high, and the application range is limited.

The capacitance electronic water level switch is a capacitor formed by a medium between an electrode and a metal barrel wall, then a high-frequency signal is applied to the electrode, the electrode has a tiny current which returns to the barrel wall (a grounding end) through the medium, and the change of the object position on the electrode can also cause the change of the height ratio of the current signal of the level meter. The disadvantages are high cost, large use cost, easy scaling and blockage, and influence on the measuring effect.

The electrode type water level switch is a novel liquid level controller, and has adjustable sensitivity, so that the electrode type water level switch has extremely strong anti-scaling capability on low-conductivity liquid. The electrode type liquid level controller detects the level of liquid by using the conductivity of the liquid. The controller can be communicated with the current of the control circuit through the contact of the measuring electrode and the conductive liquid, and then the control circuit converts the current signal into the contact switch of the relay to output, thereby realizing the sensing and the control of the liquid level.

In this embodiment, the electronic water level meter is an electrode type water level switch, as shown in fig. 2 and 3. The electrode type water level switch contacts with water in the vacuum water diversion controller through an electrode, the electrode is changed from a disconnected state to be connected with a water body resistor in series to form a passage, an electric signal is generated, a relay in the controller works through an electric control loop, and finally a switch signal is output, so that the water in the vacuum air liquid separator is controlled.

The electrode type water level switch comprises a first detection electrode E1, a second detection electrode E2 and a third detection electrode E3, the first detection electrode E1, the second detection electrode E2 and the third detection electrode E3 are respectively arranged at different heights in the gas-liquid separator, the heights are sequentially increased, the water level control unit judges that water is required to be supplemented when the water level is lower than the second detection electrode E2 according to the output data of the electronic water level meter, controls the electromagnetic valve of the water inlet pipeline of the gas-liquid separator to be opened for supplementing water, judges that the water level is higher than the third detection electrode E3 according to the output data of the electronic water level meter, does not need to be supplemented water when the water level is higher than the third detection electrode E3, controls the electromagnetic valve of the water inlet pipeline of the gas-liquid separator to be closed at the moment, water supplementing is stopped, and judges that the water level is lower than the first electrode E1 according to, and controlling a vacuum pump control loop of the pump station to be disconnected, so that the vacuum pump stops running, and the vacuum pump is protected and prevented from running in a water-deficient state.

The invention can reliably detect and reflect the water filling condition of the vacuum pump, can control the vacuum gas-liquid separator to automatically supply water at a low water level and automatically cut off water at a high water level, and can cut off a vacuum pump control loop under the condition of the low water level.

As shown in fig. 4, in this embodiment, the wheatstone bridge includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a heating element R, the first resistor R1 and the second resistor R2 are thermistors, the heating element R heats the second resistor R2, the first resistor and the third resistor are connected in series and then connected in parallel with the second resistor and the fourth resistor, and the fluid state in the vacuum line is detected by detecting the temperature difference between the first resistor and the second resistor. Because the high reliability of the Wheatstone bridge determines the stability and reliability of the flow sensor, corresponding optimization design and combination are carried out on the basis, and the vacuum water-guiding controller which has compact structure, convenient installation, strong corrosion resistance, stable work, stronger shock resistance and interference resistance, high sensitivity, stable output, good linearity and wide application range can be manufactured.

In this embodiment, a node C is located between the first resistor and the third resistor, a node B is located between the second resistor and the fourth resistor, the node C and the node B are respectively connected to two input terminals of an amplifier, and an output terminal of the amplifier is connected to an input terminal of the microprocessor after passing through an analog-to-digital converter. After power-up, the heating element R operates, resulting in a temperature difference between the two standard resistances R1, R2. This difference is constant when the medium is not flowing. If the medium flows, the heat on the heating element R will be removed and the temperature will decrease. Two thermistors: the change in the voltage across the first resistor R1 and the second resistor R2 causes the voltage across the measuring bridge B, C to change immediately. The change in voltage represents a change in real-time flow rate.

In this embodiment, the first detecting electrode, the second detecting electrode and the third detecting electrode are made of stainless steel round steel, and the first detecting electrode, the second detecting electrode and the third detecting electrode are fixed on the gas-liquid separator through an insulating plate.

In this embodiment, the water level control unit includes nine terminals, a first terminal, a seventh terminal and an eighth terminal connected to the first detecting electrode, the second detecting electrode and the third detecting electrode, respectively, the second terminal and the fourth terminal being normally open points of a first relay, an electromagnetic valve controlling a water inlet pipe of the gas-liquid separator, the third terminal and the ninth terminal being normally open points of a second relay, the vacuum pump control circuit being controlled, and the fifth terminal and the sixth terminal being connected to a power supply. Furthermore, the second relay is connected in series in the vacuum pump control loop to realize the control of the on-off of the vacuum pump control loop.

In this embodiment, the flow switch device further includes a delay control module and an output control module; when the micro-processing unit acquires a voltage signal output by the analog-to-digital converter, whether the voltage signal reaches a preset threshold value is judged, if the voltage signal does not reach the preset threshold value, the micro-processing unit controls the delay control module to start timing, the timing range is within, the micro-processing unit does not send a control signal to the output control module, the micro-processing unit judges that when the voltage signal is lower than the preset threshold value, the delay control module is controlled to stop timing and clear the timing, when the timing of the delay control module reaches the preset time threshold value, the micro-processing unit sends a control signal to the output control module, the output control module sends a starting signal to an automatic starting loop of a host unit of a pump station, and the host unit is started. The controllable delay control module effectively overcomes control misoperation caused by the false water level, so that the control is more reliable, and the influence of the false liquid level caused by liquid foam can be overcome.

In this embodiment, the working power supply of the flow switching device is connected to the solenoid valve coil of the vacuum line, and the flow switching device is connected in parallel with the solenoid valve coil of the vacuum line. Because the flow switch device does not use an inductive element, the flow switch device is not influenced by the magnetic field of the main motor, and the anti-interference performance is improved. The control part and the detection part of the flow switch device are highly integrated, and AC200V is adopted to supply power, so that the application range is increased, and the core number of output cables is reduced. In this embodiment, the working power supply of the flow switching device is connected to the solenoid valve coil of the vacuum line, and the flow switching device is connected in parallel with the solenoid valve coil of the vacuum line.

In this embodiment, the flow switching device is disposed at a top end of a vacuum outlet pipeline at a top of a volute of a water pump of the pump station, and the first resistor and the second resistor are disposed in the vacuum outlet pipeline. Specifically, a vacuum water diversion controller is arranged on the top end of the pipeline and a passage of an electromagnetic valve coil of the vacuum pipeline, a 200V alternating current power supply of the vacuum water diversion controller is connected in parallel with the electromagnetic valve coil communicated with the vacuum water diversion controller and works with the electromagnetic valve simultaneously to detect the vacuum forming condition in the water pump, timely and accurately send out a starting-up signal and ensure the success rate of starting-up. The embodiment adopts the alternating voltage to supply power to the electrode, overcomes the electric erosion phenomenon generated by the direct voltage power supply, effectively prolongs the service life of the electrode and reduces the operation dimension cost.

Because the flow switch device is arranged at a vacuumizing air outlet at the top of a water pump volute of the unit, the flow switch device needs to directly bear the vibration test of the water pump. The joint for installing the pipeline has enough strength, so that the shell of the vacuum water diversion controller is made of full alloy and integrally formed, no movable part is arranged, and maintenance-free is realized. Considering that the probe of the vacuum water-guiding controller directly contacts with the water body in the pipeline and the probe is a main temperature sensing measuring element, the high-quality austenitic stainless steel material 1Gr18Ni9Ti with good heat conduction and strong corrosion resistance is required to be selected.

The vacuum water diversion controller has the advantages that the humidity of the running environment air is high, and the environment temperature is very high due to the heat generated by the operation of the motor in summer, so that the built-in heating module is adopted in the embodiment, the temperature of each internal resistor is compensated, the working consistency of each resistor is ensured, and the error caused by temperature drift is avoided.

The invention adopts an electronic technology, an electronic water level meter is arranged on the gas-liquid separator of the vacuum pump according to the conditions required by the starting operation of the vacuum pump, a water inlet electromagnetic valve and a starting loop of the vacuum pump are controlled, water is supplemented in time when the vacuum pump is in water shortage, and the vacuum pump is stopped when the gas-liquid separator is monitored and controlled to be unable to supplement water within a set time; the vacuum drainage controller has the advantages that the liquid flow value in the vacuum pipeline is accurately measured, the vacuum degree is judged, so that a starting instruction is correctly sent, and misoperation and refusal are avoided, so that the vacuum drainage controller is high in sensitivity, convenient to install, good in popularization and accurate in vacuum critical point control.

The starting success rate of the existing vacuum starting system is very low, and according to the statistics of historical data, the starting success rate of the vacuum starting system is only 35% -40%, so that sometimes, one pump needs to be started three times or even more than three times to be started successfully, 78 degrees are consumed when the pump is started once, 234 degrees are consumed when the pump is started three times, and each degree of electricity is calculated according to 0.8 yuan, and 187.2 yuan is needed. Therefore, the cost of opening the machine twice is 124.8 yuan more. 6240 yuan may be wasted by starting a pump 50 times a year. When the number of pumps is large, the economic loss is greater. In addition, the pump station unit is also increased in impact loss after multiple startup, and the motor, the water pump and the pipeline are greatly impacted when being started every time, so that the effective service lives of the pump station unit and the vacuum system are shortened, and the maintenance cost is increased. The start-up time is prolonged, and the water supply guarantee rate is also reduced. Because rigid water supply is adopted between the pump station and the user, and the relay pump station is arranged in the middle, the startup delay can influence the coordination of the whole water supply. The intelligent electronic vacuum drainage controller of the invention can ensure that the vacuum drainage controller can be started successfully at one time, and one pump can save more than 6000 yuan per year, thereby greatly reducing the cost. The vacuum water diversion controller has the advantages of stable structure, convenient installation and simple maintenance, can reduce the purchase cost, can greatly save the cost of later maintenance and repair, and has good market prospect.

In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.

Claims

1. A safe and reliable intelligent electronic type vacuum water-leading controller is characterized by comprising a flow switch device and a water level detection device, wherein the flow switch device is used for automatically controlling the opening of a pump station main unit according to the flow velocity of fluid in a vacuum pipeline in a pump station;

2. The safe and reliable intelligent electronic vacuum drainage controller according to claim 1, wherein the wheatstone bridge comprises a first resistor, a second resistor, a third resistor, a fourth resistor and a heating element, the first resistor and the second resistor are thermistors, the heating element heats the second resistor, the first resistor and the third resistor are connected in series and then connected in parallel with the second resistor and the fourth resistor which are connected in series, and the fluid flow state in the vacuum pipeline is detected by detecting the temperature difference between the first resistor and the second resistor.

3. The safe and reliable intelligent electronic vacuum drainage controller according to claim 2, wherein a node C is arranged between the first resistor and the third resistor, a node B is arranged between the second resistor and the fourth resistor, the node C and the node B are respectively connected to two input ends of an amplifier, and an output end of the amplifier is connected to an input end of the microprocessor unit after passing through an analog-to-digital converter.

4. The safe and reliable intelligent electronic vacuum drainage controller according to claim 1, wherein the electronic water level meters are an electrode type water level switch, a hanging rope type water level switch and a capacitance type electronic water level switch.

5. The safe and reliable intelligent electronic vacuum drainage controller according to claim 1, wherein the electronic water level meter is an electrode type water level switch, the electrode type water level switch comprises a first detection electrode, a second detection electrode and a third detection electrode, the first detection electrode, the second detection electrode and the third detection electrode are respectively arranged at different heights inside the gas-liquid separator, and the heights are sequentially increased, the water level control unit controls the electromagnetic valve of the water inlet pipeline of the gas-liquid separator to be opened for water supplement when judging that the water level is lower than the second detection electrode according to the output data of the electronic water level meter, the water level control unit controls the electromagnetic valve of the water inlet pipeline of the gas-liquid separator to be closed for water supplement when judging that the water level is higher than the third detection electrode according to the output data of the electronic water level meter, and stops water supplement, and when the water level control unit judges that the water level is lower than the first electrode according to the output data of the electronic water level meter, the water level control unit controls a vacuum pump control loop of the pump station to be disconnected, so that the vacuum pump stops running.

6. The safe and reliable intelligent electronic vacuum drainage controller according to claim 5, wherein the first detection electrode, the second detection electrode and the third detection electrode are made of stainless steel round steel, and the first detection electrode, the second detection electrode and the third detection electrode are fixed on the gas-liquid separator through an insulation plate.

7. The safe and reliable intelligent electronic vacuum drainage controller according to claim 5, wherein the water level control unit comprises nine terminals, wherein a first terminal, a seventh terminal and an eighth terminal are respectively connected to the first detection electrode, the second detection electrode and the third detection electrode, the second terminal and the fourth terminal are normally open points of a first relay, an electromagnetic valve for controlling a water inlet pipeline of the gas-liquid separator, and the third terminal and the ninth terminal are normally open points of a second relay, and are used for controlling the vacuum pump control circuit and the fifth terminal and the sixth terminal are connected with a power supply.

8. The safe and reliable intelligent electronic vacuum drainage controller according to claim 7, wherein the second relay is connected in series in the vacuum pump control loop.

9. The safe and reliable intelligent electronic vacuum drainage controller according to claim 1, wherein the flow switch device further comprises a time delay control module and an output control module;

10. The safe and reliable intelligent electronic vacuum drainage controller according to claim 1, wherein the working power supply of the flow switching device is connected to the solenoid valve coil of the vacuum pipeline, and the flow switching device is connected in parallel with the solenoid valve coil of the vacuum pipeline.