Control system for automatic flushing and cleaning of water tank

Abstract

The utility model provides a control system for automatically flushing and cleaning a water tank, the lower part of the water tank is provided with a water outlet pipeline, a water pump pumps water from the water tank through the water outlet pipeline, and the output end of the water pump is communicated with a water supply pipeline through a water pipeline; the control system comprises a water inlet pipeline, a water inlet valve, a cleaning pipeline, a cleaning valve, a water drainage pipeline, a water drainage valve, a water outlet pipeline, a water source switching valve, a cleaning spray head, a liquid level sensor and a PLC (programmable logic controller), the water drainage pipeline is provided with a flow detector, and the water outlet pipeline is provided with the water source switching valve. The water pump, the water inlet pressure sensor, the water inlet valve, the cleaning valve, the drain valve, the water source switching valve, the cleaning nozzle, the liquid level sensor and the flow detector are all in communication connection with the PLC; when the water tank is washed and cleaned, municipal pressure-superposed water supply is switched, normal water supply of residents is not affected, municipal water supply is fully utilized, and water source waste is reduced; opening and closing of all valves and pipelines are controlled through a PLC, and the automation degree is high.

Description

Technical Field

[0001] The utility model relates to the technical field of water tank flushing and cleaning, in particular to a control system for automatic flushing and cleaning of a water tank. Background Art

[0002] At present, water supply tanks on the market are generally cleaned manually. This cleaning mode takes a long time to drain and clean, has low work efficiency, and a long water outage time. It not only wastes water resources and affects normal water supply, but also poses a safety hazard. Utility Model Content

[0003] The utility model aims to provide a control system for automatic flushing and cleaning of a water tank.

[0004] In order to achieve the above purpose, the technical solution of the utility model is:

[0005] A control system for automatic flushing and cleaning of a water tank, wherein a water outlet pipeline is provided at the lower part of the water tank, a water pump draws water from the water tank through the water outlet pipeline, and the output end of the water pump is connected to the water supply pipeline through a water delivery pipeline, characterized in that:

[0006] It includes a water inlet pipeline, a water inlet valve, a cleaning pipeline, a cleaning valve, a drainage pipeline, a drainage valve, a water outlet pipeline, a water source switching valve, a cleaning nozzle, a liquid level sensor and a PLC controller. Municipal water is input into one end of the water inlet pipeline, a water inlet pressure sensor is provided at one end of the water inlet pipeline, the other end of the water inlet pipeline is communicated with the upper part of the water tank, the water inlet valve is located at the other end of the water inlet pipeline, the cleaning pipeline is communicated with the water inlet pipeline, one end of the cleaning pipeline is connected to the input end of the water inlet valve, the other end of the cleaning pipeline extends to the inside of the water tank, the cleaning nozzle is located in the water tank, the cleaning pipeline supplies water to the cleaning nozzle, the drainage pipeline is communicated with the bottom of the water tank, the drainage valve is arranged on the drainage pipeline, the drainage pipeline is provided with a flow detector, the water outlet pipeline is provided with a water source switching valve, the water pump, the water inlet pressure sensor, the water inlet valve, the cleaning valve, the drainage valve, the water source switching valve, the cleaning nozzle, the liquid level sensor, and the flow detector are all communicatively connected with the PLC controller.

[0007] Furthermore, the control system also includes a stabilizing tank, which is provided with a first stabilizing pipeline and a second stabilizing pipeline, one end of the first stabilizing pipeline is connected to the upper part of the stabilizing tank, the other end of the first stabilizing pipeline is connected to the water inlet pipeline, the other end of the first stabilizing pipeline is connected to the input end of the water inlet valve, one end of the second stabilizing pipeline is connected to the lower part of the stabilizing tank, the other end of the second stabilizing pipeline is connected to the water outlet pipeline, and the other end of the second stabilizing pipeline is connected to the water source switching valve.

[0008] Furthermore, the water inlet pipeline is provided with a Y-type filter, a backflow preventer and a water inlet pressure sensor in sequence along the municipal water inlet direction.

[0009] Furthermore, the water supply pipeline is provided with an electric contact pressure gauge and a water supply pressure sensor, and the electric contact pressure gauge and the water supply pressure sensor are both communicatively connected to the PLC controller.

[0010] Furthermore, the water supply pipeline is connected to a pressure tank.

[0011] The utility model integrates the water tank flushing and cleaning system with the water tank water supply system. When flushing and cleaning the water tank, the water supply is switched to the municipal superimposed water supply, which does not affect the normal water supply of residents, fully utilizes the municipal water supply, and reduces water waste.

[0012] The utility model controls the opening and closing of each valve and pipeline through PLC, and has high automation degree and high working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the system structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the opening and closing control of the valve of the utility model;

[0015] Figure 3 This is a control schematic diagram of the valve combined with the sensor of the utility model;

[0016] Figure 4 This is a schematic diagram of PLC control of the utility model;

[0017] Figure 5 Schematic diagram of the process for flushing and cleaning the water tank;

[0018] Figure 6 Schematic diagram of the opening conditions for flushing and cleaning the water tank.

[0019] Reference numerals:

[0020] 1 PLC controller, 2 steady flow tank, 3 water outlet pipeline, 4 air pressure tank, 5 water supply pressure sensor,

[0021] 6 Electric contact pressure gauge, 7 Water pump, 8 Liquid level sensor, 9 Drain pipe, 10 Flow detector,

[0022] 11 water inlet pipe, 12 cleaning pipe, 13 water inlet pressure sensor, 14 backflow preventer,

[0023] 15 Y-type filter, 16 water tank,

[0024] FM1 water inlet valve, FM2 cleaning valve, FM3 water source switching valve, FM4 drain valve. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model discloses a control system for automatic flushing and cleaning of a water tank. A water outlet pipeline 3 is arranged at the lower part of a water tank 16. A water pump 7 draws water from the water tank 16 through the water outlet pipeline 3. The output end of the water pump 7 is connected with a water supply pipeline through a water delivery pipeline. The control system specifically comprises a water inlet pipeline 11, a water inlet valve FM1, a cleaning pipeline 12, a cleaning valve FM2, a drainage pipeline 9, a drainage valve FM4, a water outlet pipeline 3, a water source switching valve FM3, a cleaning nozzle, a liquid level sensor 8 and a PLC controller 1.

[0027] Municipal water is input to one end of the water inlet pipe 11, and a Y-type filter 15, a backflow preventer 14 and a water inlet pressure sensor 13 are provided on one end of the water inlet pipe 11 in sequence from the municipal water inlet direction. The other end of the water inlet pipe 11 is connected to the upper part of the water tank 16, and the water inlet valve FM1 is located at the other end of the water inlet pipe 11. The cleaning pipe 12 is connected to the water inlet pipe 11, and one end of the cleaning pipe 12 is connected to the input end of the water inlet valve FM1, and the other end of the cleaning pipe 12 extends to the interior of the water tank 16. The cleaning nozzle is located in the water tank 16, and the cleaning pipe 12 supplies water to the cleaning nozzle.

[0028] The drainage pipe 9 is connected to the bottom of the water tank 16, the drainage valve FM4 is arranged on the drainage pipe 9, the drainage pipe 9 is provided with a flow detector 10, the outlet pipe 3 is provided with a water source switching valve FM3, the water pump 7, the water inlet pressure sensor 13, the water inlet valve FM1, the cleaning valve FM2, the drainage valve FM4, the water source switching valve FM3, the cleaning nozzle, the liquid level sensor 8, and the flow detector 10 are all communicatively connected with the PLC controller 1.

[0029] The control system also includes a stabilizing tank 2, which is provided with a first stabilizing flow pipeline and a second stabilizing flow pipeline, one end of the first stabilizing flow pipeline is connected to the upper part of the stabilizing tank 2, the other end of the first stabilizing flow pipeline is connected to the water inlet pipeline 11, the other end of the first stabilizing flow pipeline is connected to the input end of the water inlet valve FM1, one end of the second stabilizing flow pipeline is connected to the lower part of the stabilizing tank 2, the other end of the second stabilizing flow pipeline is connected to the water outlet pipeline 3, and the other end of the second stabilizing flow pipeline is connected to the water source switching valve FM3.

[0030] The water supply pipeline is provided with an electric contact pressure gauge 6 and a water supply pressure sensor 5 , both of which are communicatively connected to the PLC controller 1 , and the water supply pipeline is also connected to a pressure tank 4 .

[0031] like Figure 2 As shown, circuit breakers QF10, QF11, QF12, QF13, and QF14 are respectively responsible for connecting and disconnecting the power supply circuits of the water inlet valve FM1, the cleaning valve FM2, the water source switching valve FM3, and the drain valve FM4; the main contacts of the AC contactors KM1, KM3, KM5, and KM7 respectively control the power on and off of the valve opening functions of the water inlet valve FM1, the cleaning valve FM2, the water source switching valve FM3, and the drain valve FM4; the main contacts of the AC contactors KM2, KM4, KM6, and KM8 respectively control the power on and off of the valve closing functions of the water inlet valve FM1, the cleaning valve FM2, the water source switching valve FM3, and the drain valve FM4.

[0032] like Figure 3 As shown, the fuse FU1 is used for overcurrent and short circuit protection of the control circuit, and the conversion switch SA1 is a manual-automatic control selection switch. When the conversion switch SA1 is in the manual state, the coil of the intermediate relay KA9 is energized and connected, and the normally open contact is attracted. At this time, the manual knob switches SA2, SA4, SA6, and SA8 can be used to control the coils of the AC contactors KM1, KM3, KM5, and KM7 to attract and realize the valve opening functions of the water inlet valve FM1, the cleaning valve FM2, the water source switching valve FM3, and the drain valve FM4, or the manual knob switches SA3, SA5, SA7, and SA9 can be used to control the coils of the AC contactors KM2, KM4, KM6, and KM8 to attract and realize the valve closing functions of the water inlet valve FM1, the cleaning valve FM2, the water source switching valve FM3, and the drain valve FM4;

[0033] When the switch SA1 is in the automatic state, the coil of the intermediate relay KA10 is energized and the normally open contact is closed. Figure 4 The PLC controller 1 in the control unit controls the coils of the intermediate relays KA1, KA3, KA5, and KA7 to be attracted, and the normally open contacts of the corresponding intermediate relays KA1, KA3, KA5, and KA7 are connected, and the coils of the AC contactors KM1, KM3, KM5, and KM7 are controlled to be attracted, respectively, to realize the valve opening functions of the water inlet valve FM1, the cleaning valve FM2, the water source switching valve FM3, and the drain valve FM4;

[0034] Alternatively, Figure 4 The PLC controller 1 in the control unit controls the coils of the intermediate relays KA2, KA4, KA6, and KA8 to be attracted, and the normally open contacts of the corresponding intermediate relays KA2, KA4, KA6, and KA8 are connected, which respectively controls the coils of the AC contactors KM2, KM4, KM6, and KM8 to be attracted, thereby realizing the valve closing functions of the water inlet valve FM1, the cleaning valve FM2, the water source switching valve FM3, and the drain valve FM4.

[0035] The normally closed contacts of AC contactors KM1~KM10 are interlocking contacts of corresponding valves to prevent mechanical failure or life injury accidents caused by erroneous operation; the power indicator HL1 is the power supply indicator of the control circuit, which is on when the control circuit has power and off when there is no power; the switching power supply S converts AC 220V into DC 24V to supply power to the imported pressure sensor 13, liquid level sensor 8, touch screen HMI, and analog module EM AM03; the travel switches STC, SLC, STO, and SLO are the internal travel limit switches of the corresponding valves to protect the valves and prevent excessive adjustment of the valves from damaging the valve mechanical devices.

[0036] like Figure 4 As shown, the PLC controller 1 is the central part of the whole system, the analog module EM AM03 is the analog signal acquisition module, which converts the 4~20mA analog signal transmitted by the water inlet pressure sensor 13 and the liquid level sensor 8 into a digital signal; the fuse FU2 is used for overcurrent and short circuit protection of the PLC circuit; the touch screen HMI is the display and setting unit of the control system, and the collected valve status, real-time pressure, and liquid level of the water tank 16 can be intuitively displayed on the HMI, and the corresponding parameters of the water tank cleaning cycle, water tank cleaning time, water tank flushing times, water tank minimum liquid level, and water tank rated flushing pressure parameters can also be set through the HMI.

[0037] KA1~KA8 are intermediate relay coils, OSL is the normally open contact inside the corresponding valve, which is connected when the valve is fully opened, and CSL is the normally open contact inside the corresponding valve, which is connected when the valve is fully closed; LL is the contact of the flow detector 10 (water flow switch) at the drain outlet of the water tank 16, which is connected when water flows through and disconnected when no water flows through; KA10 is the normally open contact of the intermediate relay. When the contact is connected, the PLC controller 1 automatically controls the cleaning and water supply functions of the water tank 16 according to the pre-written logic program.

[0038] The flushing and cleaning control method of the control system using the automatic flushing and cleaning of the water tank is controlled by the PLC controller 1, such as Figure 5 and Figure 6 As shown, the following steps are included:

[0039] Step S1) the water inlet valve FM1 is opened, the municipal water enters the water tank 16, and the water level of the water tank 16 continues to rise to the rated water level;

[0040] Step S2) the water inlet valve FM1 is closed, the water source switching valve FM3 is closed, the water pump 7 draws water from the water tank 16, and the system is supplied with water normally;

[0041] Step S3) the water level in the water tank 16 continues to decrease until the liquid level sensor 8 is triggered;

[0042] Step S4) the water source switching valve FM3 is opened, the water pump 7 stops pumping water, and switches to municipal water;

[0043] Step S5) the drain valve FM4 is opened;

[0044] Step S6) determining whether the flow detector 10 has a reading;

[0045] If so, drain valve FM4 remains open;

[0046] If not, jump to step S7;

[0047] Step S7) The drain valve FM4 is closed, and it is determined whether the water tank 16 has reached the cleaning cycle.

[0048] If yes, jump to step S8;

[0049] If not, return to step S1;

[0050] Step S8) Determine whether the inlet pressure sensor reading is greater than the rated flushing pressure of the water tank.

[0051] If yes, jump to step S9;

[0052] If not, return to step S1;

[0053] Step S9) the cleaning valve FM2 is opened, and municipal water is sprayed out from the cleaning nozzle to flush the water tank 16;

[0054] Step S10) determines whether the flushing time and flushing times have reached the rated standard.

[0055] If yes, jump to step S11;

[0056] If not, continue flushing the water tank 16;

[0057] Step S11) After the water tank 16 is flushed, the cleaning valve FM2 is closed and the drain valve FM4 is opened;

[0058] Step S12) determining whether the flow detector 10 has a reading;

[0059] If so, drain valve FM4 remains open;

[0060] If not, jump to step S13;

[0061] Step S13) Cleaning is completed and returns to step S1.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A control system for automatic flushing and cleaning of a water tank, wherein a water outlet pipeline is provided at the lower part of the water tank, a water pump draws water from the water tank through the water outlet pipeline, and the output end of the water pump is connected to the water supply pipeline through a water delivery pipeline, characterized in that: It includes a water inlet pipeline, a water inlet valve, a cleaning pipeline, a cleaning valve, a drainage pipeline, a drainage valve, a water outlet pipeline, a water source switching valve, a cleaning nozzle, a liquid level sensor and a PLC controller. Municipal water is input into one end of the water inlet pipeline, a water inlet pressure sensor is provided at one end of the water inlet pipeline, the other end of the water inlet pipeline is communicated with the upper part of the water tank, the water inlet valve is located at the other end of the water inlet pipeline, the cleaning pipeline is communicated with the water inlet pipeline, one end of the cleaning pipeline is connected to the input end of the water inlet valve, the other end of the cleaning pipeline extends to the inside of the water tank, the cleaning nozzle is located in the water tank, the cleaning pipeline supplies water to the cleaning nozzle, the drainage pipeline is communicated with the bottom of the water tank, the drainage valve is arranged on the drainage pipeline, the drainage pipeline is provided with a flow detector, the water outlet pipeline is provided with a water source switching valve, the water pump, the water inlet pressure sensor, the water inlet valve, the cleaning valve, the drainage valve, the water source switching valve, the cleaning nozzle, the liquid level sensor, and the flow detector are all communicatively connected with the PLC controller.

2. The control system according to claim 1, characterized in that: The control system also includes a stabilizing tank, which is provided with a first stabilizing pipeline and a second stabilizing pipeline, one end of the first stabilizing pipeline is connected to the upper part of the stabilizing tank, the other end of the first stabilizing pipeline is connected to the water inlet pipeline, the other end of the first stabilizing pipeline is connected to the input end of the water inlet valve, one end of the second stabilizing pipeline is connected to the lower part of the stabilizing tank, the other end of the second stabilizing pipeline is connected to the water outlet pipeline, and the other end of the second stabilizing pipeline is connected to the water source switching valve.

3. The control system according to claim 1, characterized in that: The water inlet pipeline is provided with a Y-type filter, a backflow preventer and a water inlet pressure sensor in sequence along the municipal water inlet direction.

4. The control system according to claim 1, characterized in that: The water supply pipeline is provided with an electric contact pressure gauge and a water supply pressure sensor, and the electric contact pressure gauge and the water supply pressure sensor are both communicatively connected with the PLC controller.

5. The control system according to claim 4, characterized in that: The water supply pipeline is connected with an air pressure tank.

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