阅读说明：本技术 水泵多功能阀强制闭锁防回流装置 (Forced locking anti-backflow device for multifunctional valve of water pump ) 是由 刘衡 郭敬祝 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种水泵多功能阀强制闭锁防回流装置,包括电控柜、供水主管、供水支管、高压强制水泵,供水主管上设有第二水泵,供水支管两端并接在第二水泵两端,供水支管上设有第一水泵,供水支管上设有第一流量计、第一水泵多功能阀和第一三通电磁阀,第一水泵多功能阀上设有第一压力传感器,供水主管上设有第二流量计、进水压力传感器、第二水泵多功能阀、第二三通电磁阀和出水压力传感器,第二水泵多功能阀上设有第二压力传感器,高压强制水泵与第一三通电磁阀、第二三通电磁阀连接。本发明解决了多功能阀在变频运行状态下易导致回流的问题,避免变频水泵空耗运行,使供水系统始终保持高效运行。(The invention discloses a forced locking backflow prevention device for a multifunctional valve of a water pump, which comprises an electric control cabinet, a main water supply pipe, a branch water supply pipe and a high-pressure forced water pump, wherein a second water pump is arranged on the main water supply pipe, two ends of the branch water supply pipe are connected to two ends of the second water pump in parallel, a first water pump is arranged on the branch water supply pipe, a first flowmeter, a first multifunctional water pump valve and a first three-way electromagnetic valve are arranged on the branch water supply pipe, a first pressure sensor is arranged on the first multifunctional water pump valve, a second flowmeter, a water inlet pressure sensor, a second multifunctional water pump valve, a second three-way electromagnetic valve and a water outlet pressure sensor are arranged on the main water supply pipe, a second pressure sensor is arranged on the second multifunctional water pump valve, and the high-. The invention solves the problem that the multi-functional valve is easy to cause backflow in a variable frequency operation state, avoids the idle running of the variable frequency water pump, and enables the water supply system to always keep high-efficiency running.)

1. The utility model provides a water pump multifunctional valve forces shutting back flow prevention device which characterized in that: the water supply system comprises an electric control cabinet, a water supply main pipe, a water supply branch pipe and a high-pressure forced water pump, wherein the water supply main pipe extends to the top end of a building from the ground, the water inlet end of the water supply main pipe is located on the ground, a second water pump is arranged on the water supply main pipe and located on the ground, the two ends of the water supply branch pipe are connected in parallel to the two ends of the second water pump, a first water pump is arranged on the water supply branch pipe, a first flowmeter is arranged on one side, located on the water inlet end of the first water pump, of the water supply branch pipe, a first water pump multifunctional valve and a first three-way electromagnetic valve are arranged on one side, located on the water outlet end of the first water pump, a second flowmeter is arranged on one side, located on the water inlet end of the second water pump, of the water supply main pipe, a water inlet pressure sensor is arranged between the second flowmeter, The multifunctional valve of the second water pump is provided with a second pressure sensor, the water inlet end of the high-pressure forced water pump is connected with the water outlet end of the water supply main pipe, the water outlet end of the high-pressure forced water pump is respectively connected with the first three-way electromagnetic valve and the second three-way electromagnetic valve, and the first flow meter, the second flow meter, the water inlet pressure sensor, the water outlet pressure sensor, the high-pressure forced water pump, the first three-way electromagnetic valve, the second three-way electromagnetic valve, the first water pump, the second water pump, the first pressure sensor and the second pressure sensor are all connected with the electric control cabinet.

2. The water pump multifunctional valve forced locking backflow prevention device according to claim 1, characterized in that: the electric control cabinet comprises a central control unit, a touch screen, a first frequency converter, a second frequency converter and a wireless communication module, the signal output end of the water outlet pressure sensor, the signal output end of the first flowmeter, the signal output end of the second pressure sensor, the signal output end of the second flowmeter, the signal output end of the water inlet pressure sensor, the touch screen, the first three-way electromagnetic valve, the second three-way electromagnetic valve, the high-pressure forced water pump and the wireless communication module are all connected with the central control unit, the central control unit is connected with the first water pump through the first frequency converter, and the central control unit is connected with the second water pump through the second frequency converter.

3. The water pump multifunctional valve forced locking backflow prevention device according to claim 2, characterized in that: the main chip of the central control unit adopts PLC with the model number of S7-200 SMART.

4. The water pump multifunctional valve forced locking backflow prevention device according to claim 2, characterized in that: the main chip type of the wireless communication module is GRM 203.

Technical Field

The invention relates to a forced locking backflow prevention device for a multifunctional valve of a water pump.

Background

The multifunctional valve applied to the outlet of the water pump at present has the performance of slowly opening and slowly closing, and effectively prevents water hammer when the water pump is started and stopped frequently. However, in a system with multiple water pumps running in parallel, when the water pumps run in a frequency conversion mode, because the change of the water outlet pressure relative to the power frequency is slow, especially when the water pumps run from a high speed to a low speed, the front-back pressure difference of the multifunctional valves is small, so that the water outlet part of the water pumps run in the power frequency mode flows back to the water inlet end through the water pumps running in the frequency conversion mode, the water pumps run in an idle mode, and a large amount of electric energy is wasted.

Disclosure of Invention

In order to solve the technical problems, the invention provides the forced locking backflow prevention device for the multifunctional valve of the water pump, which has the advantages of simple structure and low cost.

The technical scheme for solving the problems is as follows: a water pump multifunctional valve forced locking backflow prevention device comprises an electric control cabinet, a water supply main pipe, a water supply branch pipe and a high-pressure forced water pump, wherein the water supply main pipe extends from the ground to the top end of a building, the water inlet end of the water supply main pipe is located on the ground, a second water pump is arranged on the water supply main pipe and located on the ground, two ends of the water supply branch pipe are connected to two ends of the second water pump in parallel, a first water pump is arranged on the water supply branch pipe, a first flowmeter is arranged on one side, located at the water inlet end of the first water pump, of the water supply branch pipe, a first water pump multifunctional valve and a first three-way electromagnetic valve are arranged on one side, located at the water outlet end of the first water pump, of the water supply branch pipe, a first pressure sensor is arranged on the first water pump multifunctional valve, a second flowmeter is arranged on one side, the water supply main pipe is provided with a second water pump multifunctional valve, a second three-way electromagnetic valve and a water outlet pressure sensor on one side of the water outlet end of the second water pump, the second water pump multifunctional valve is provided with a second pressure sensor, the water inlet end of the high-pressure forced water pump is connected with the water outlet end of the water supply main pipe, the water outlet end of the high-pressure forced water pump is respectively connected with a first three-way electromagnetic valve and a second three-way electromagnetic valve, and the first flowmeter, the second flowmeter, the water inlet pressure sensor, the water outlet pressure sensor, the high-pressure forced water pump, the first three-way electromagnetic valve, the second three-way electromagnetic valve, the first water pump, the second water pump, the first pressure sensor and the second pressure sensor.

The electric control cabinet comprises a central control unit, a touch screen, a first frequency converter, a second frequency converter and a wireless communication module, wherein the signal output end of the water outlet pressure sensor, the signal output end of the first flowmeter, the signal output end of the second pressure sensor, the signal output end of the second flowmeter, the signal output end of the water inlet pressure sensor, the touch screen, the first three-way electromagnetic valve, the second three-way electromagnetic valve, the high-pressure forced water pump and the wireless communication module are all connected with the central control unit, the central control unit is connected with the first water pump through the first frequency converter, and the central control unit is connected with the second water pump through the second frequency converter.

According to the forced locking backflow prevention device for the multifunctional valve of the water pump, the main chip of the central control unit adopts a PLC (programmable logic controller) with the model number of S7-200 SMART.

According to the forced locking backflow prevention device for the multifunctional valve of the water pump, the type of the main chip of the wireless communication module is GRM 203.

The invention has the beneficial effects that: the invention is provided with a high-pressure forced water pump and a three-way electromagnetic valve, when the multifunctional valve reflows, the three-way electromagnetic valve is controlled to be forcibly locked, the high-pressure forced water pump applies high water pressure to forcibly lock and close the multifunctional valve, and the multifunctional valve quits the operation of the invalid variable-frequency water pump at the same time, so that the water pump is prevented from reflowing, the problem that the multifunctional valve is easy to reflow in a variable-frequency operation state is solved, the idle running of the variable-frequency water pump is avoided, and the water supply system is always kept to run.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a structural block diagram of the electric control cabinet in fig. 1.

Fig. 3 is a circuit diagram of the present invention.

Detailed Description

The invention is further described below with reference to the figures and examples.

As shown in figure 1, the water pump multifunctional valve forced locking backflow prevention device comprises an electric control cabinet 14, a water supply main pipe, a water supply branch pipe and a high-pressure forced water pump 1, wherein the water supply main pipe extends from the ground to the top end of a building, the water inlet end of the water supply main pipe is positioned on the ground, a second water pump 11 is arranged on the water supply main pipe and positioned on the ground, the two ends of the water supply branch pipe are connected in parallel with the two ends of the second water pump 11, a first water pump 6 is arranged on the water supply branch pipe, a first flow meter 7 is arranged on the water supply branch pipe and positioned on one side of the water inlet end of the first water pump 6, a first water pump multifunctional valve 4 and a first three-way electromagnetic valve 3 are arranged on the water supply branch pipe and positioned on one side of the water outlet end of the first water pump multifunctional valve 4, a first pressure sensor 5 is arranged on the water inlet end of the first water, the middle of the water outlet pressure guiding pipe at the water outlet end of the first water pump multifunctional valve 4 is connected with a first three-way electromagnetic valve 3 in series, the first three-way electromagnetic valve 3 is connected with the water outlet end of the high-pressure forced water pump 1, and the water outlet pressure guiding pipe at the water outlet end of the first water pump multifunctional valve 4 is normally connected with the first water pump multifunctional valve 4 through the first three-way electromagnetic valve 3 to realize normal opening and closing actions. A second flowmeter 12 is arranged on the water supply main pipe and positioned at one side of the water inlet end of a second water pump 11, a water inlet pressure sensor 13 is arranged on the water supply main pipe and positioned between the second flowmeter 12 and the water inlet end of the water supply main pipe, a second water pump multifunctional valve 9, a second three-way electromagnetic valve 8 and a water outlet pressure sensor 2 are arranged on the water supply main pipe and positioned at one side of the water outlet end of the second water pump 11, a second pressure sensor 10 is arranged at the water inlet end of the second water pump multifunctional valve 9, a multifunctional valve water inlet pressure leading pipe is connected between the water inlet end of the second water pump multifunctional valve 9 and the second pressure sensor 10, a second three-way electromagnetic valve 8 is connected in series in the middle of the water outlet pressure leading pipe at the water outlet end of the second water pump multifunctional valve 9, the second three-way electromagnetic valve 8 is connected with the water outlet end of the high-pressure forced water pump 1, and the function is that the water outlet pressure leading pipe, realize normal switching action, when the second water pump multifunctional valve 9 takes place to flow back, the action of second three way solenoid valve 8, 9 play water pressure leading pipe passageways of second water pump multifunctional valve at the time of cutting off ordinary times, 9 play water pressure leading pipe passageways of second water pump multifunctional valve switch to the high pressure and force water pump 1 to go out the water end, and 9 play water pressure leading pipe pressure of second water pump multifunctional valve rise to force to close second water pump multifunctional valve 9. The water inlet end of the high-pressure forced water pump 1 is connected with the water outlet end of the water supply main pipe, the water outlet end of the high-pressure forced water pump 1 is respectively connected with the first three-way electromagnetic valve 3 and the second three-way electromagnetic valve 8, and the first flow meter 7, the second flow meter 12, the water inlet pressure sensor 13, the water outlet pressure sensor 2, the high-pressure forced water pump 1, the first three-way electromagnetic valve 3, the second three-way electromagnetic valve 8, the first water pump 6, the second water pump 11, the first pressure sensor 5 and the second pressure sensor 10 are all connected with the electric control cabinet 14.

As shown in fig. 2, the electric control cabinet 14 includes a central control unit 15, a touch screen 16, a first frequency converter 17, a second frequency converter 18, and a wireless communication module, wherein the signal output terminal of the water outlet pressure sensor 2, the signal output terminal of the first pressure sensor 5, the signal output terminal of the first flow meter 7, the signal output terminal of the second pressure sensor 10, the signal output terminal of the second flow meter 12, the signal output terminal of the water inlet pressure sensor 13, the touch screen 16, the first three-way electromagnetic valve 3, the second three-way electromagnetic valve 8, the high-pressure forced water pump 1, and the wireless communication module are all connected to the central control unit 15, the central control unit 15 is connected to the first water pump 6 through the first frequency converter 17, and the central control unit 15 is connected to the second water pump 11 through the second frequency converter 18.

As shown in fig. 3, the main chip of the central control unit 15 adopts PLC, model S7-200 SMART. The main chip type of the wireless communication module is GRM 203.

In fig. 3, the-terminal of the first pressure sensor P1 is terminated by the 0+ terminal of the analog input module EMAI04, the-terminal of the second pressure sensor P2 is terminated by the 1+ terminal of the analog input module EMAI04, the-terminal of the outlet water pressure sensor P3 is terminated by the 2+ terminal of the analog input module EMAI04 block, and the-terminal of the inlet water pressure sensor P4 is terminated by the 3+ terminal of the analog input module EMAI04 block. RS485 terminals of the first flowmeter E + H1 and the second flowmeter E + H2 are connected with an RS485 serial port terminal of the PLC, and the PLC reads flow data of the first flowmeter and the second flowmeter through the RS485 serial port. An RS485 terminal of the PLC is connected with RS485 terminals of the first frequency converter EV1 and the second frequency converter EV2, communication between the PLC and the frequency converters EV1 and EV2 is achieved, and the PLC reads water pump running frequency and current signals of the frequency converters EV1 and EV2 through an RS485 serial port. And an RS485 terminal of the PLC is connected with an RS485 terminal of a wireless communication alarm module (GRM 203). The U/V/W terminal of the first frequency converter EV1 is connected with the first water pump motor wiring terminal, and the U/V/W terminal of the second frequency converter EV2 is connected with the second water pump motor wiring terminal. The operation terminals FWD/COM of the first frequency converter EV1 and the second frequency converter EV2 are respectively controlled by normally open contacts of the relays KA1 and KA2, and the relay coils KA1 and KA2 are respectively connected to output ends of PLC, 0 and 2. The coil of the KA3 relay and the coil of the KA4 relay are respectively connected to the output ends.3 and.4 of the PLC. The normally open contact of the relay KA4 is connected with the three-way solenoid valve CF. And the Ethernet port of the touch screen HMI is connected with the Ethernet port of the PLC to realize communication between the touch screen HMI and the PLC.

The working principle of the invention is as follows: the pressure at the two ends of the water inlet and outlet of the multifunctional valve and the running frequency, the current, the flow and the switching signal of the variable frequency water pump are sent to the central control unit 15 for judgment, when the multifunctional valve is judged to be refluxed, the three-way electromagnetic valve is controlled to act, and the water outlet pressure leading pipe passage of the multifunctional valve is switched to be a high-pressure forced water pump water outlet passage, so that the pressure of the water outlet pressure leading pipe of the multifunctional valve is increased, the multifunctional valve is closed by forced locking, the invalid variable frequency water pump is withdrawn for running, and the water outlet reflux of the water pump is avoided. The high water pressure source is provided by a high pressure forced water pump 1 arranged at the water outlet end.