Closed self-cleaning, storage and water supply compensation device and system, and use method

Abstract

The present invention provides a closed self-cleaning, storage and water supply compensation device and system, and a use method. The device comprises: an upper water tank body, an upper flange, a lower flange, and a lower water tank body which are arranged in sequence, wherein the outer wall of the upper water tank body is welded to the inner wall of the upper flange, the outer wall of the lower water tank body is welded to the inner wall of the lower flange, an exhaust valve is provided on the upper water tank body, and a drain valve is provided on the lower water tank body; a diaphragm provided between the upper flange and the lower flange, wherein the upper flange, the diaphragm, and the lower flange are connected by means of fasteners, a cavity area is formed between the diaphragm and the upper water tank body, and a water storage area is formed between the diaphragm and the lower water tank body; a water inlet pipe and a water outlet pipe both communicated with the lower water tank body and both radially tangent to the lower water tank body, wherein an output end of the water outlet pipe is connected to an input end of the water inlet pipe, a water inlet electric valve is provided on the water inlet pipe, and a water outlet electric valve is provided on the water outlet pipe; and a booster pump and a Venturi tube. The present invention allows for isolation of air from water, and has a self-cleaning capability. The system compensates for water supply in a peak mode, and stores water and performs self-cleaning in a normal mode.

Description

Closed self-cleaning reserve compensation water supply equipment, system and use method TECHNICAL FIELD

[0001] The present application belongs to the technical field of water supply, and particularly relates to a closed self-cleaning reserve compensation water supply equipment, system and use method. BACKGROUND

[0002] At present, the municipal pipe network generally adopts the mode of direct supply in low areas and secondary pressurization supply in high areas for water supply to urban residential buildings. Considering the possible insufficient water supply of the municipal pipe network during the peak water consumption period, a water storage tank is often used for water storage to compensate for the water supply during the peak period.

[0003] The water supply mode mainly has the following problems:

[0004] 1. The water storage tank is designed to be open, which is difficult to ensure the cleanliness of the water quality, and there are certain problems in the safety of water use by residents. In addition, the water tank needs to be stopped for cleaning, which is difficult to clean and inconvenient to operate.

[0005] 2. After using the water storage tank, the pressurization equipment cannot utilize the original municipal pressure, and needs to do more lift work, resulting in high water supply cost.

[0006] 3. The application number CN201520574674.2 is a compensation water supply system, which relies on a simple sedimentation of a steady flow compensation tank, and the sediment is discharged through a sewage outlet after sedimentation. However, the steady flow compensation tank cannot be disassembled, and it is difficult to clean. Long-term use will bring scale impurities to subsequent water use, affecting user experience. SUMMARY

[0007] The purpose of the present application is to provide a closed self-cleaning reserve compensation water supply equipment, system and use method. The equipment can realize air and water isolation and has self-cleaning ability. The system compensates for water supply in the peak mode and stores water and self-cleans in the normal mode. The technical scheme adopted is as follows:

[0008] A closed self-cleaning reserve compensation water supply equipment, comprising:

[0009] An upper water tank body 1, an upper flange, a lower flange and a lower water tank body 2 are sequentially arranged;

[0010] The outer wall of the upper water tank body 1 is welded to the inner wall of the upper flange, and the outer wall of the lower water tank body 2 is welded to the inner wall of the lower flange. An exhaust valve is arranged on the upper water tank body 1, and a sewage valve is arranged on the lower water tank body 2;

[0011] A diaphragm 4 is arranged between the upper flange and the lower flange, and the upper flange, the diaphragm 4 and the lower flange are connected by fasteners. The diaphragm 4 and the upper water tank body 1 form a cavity area therebetween, and the diaphragm 4 and the lower water tank body 2 form a water storage area therebetween;

[0012] an inlet pipe 5 and an outlet pipe 6, both of which are in communication with the lower tank 2 and are tangential to the lower tank 2, and an output end of the outlet pipe 6 is connected to an input end of the inlet pipe 5;

[0013] an inlet electric valve 51 is arranged on the inlet pipe 5, and an outlet electric valve 61 is arranged on the outlet pipe 6;

[0014] a booster pump 8 and a Venturi tube 10 are arranged on the outlet pipe 6 in sequence, and an electromagnetic valve is arranged between a throat of the Venturi tube 10 and a medicine barrel 9; water flows into the inlet section of the Venturi tube 10 and flows out of the diffusion section thereof; and a medicament in the medicine barrel 9 is used to dissolve scale.

[0015] Preferably, when water storage is completed, the diaphragm 4 protrudes into the upper tank 1 and forms a preset distance with the top of the upper tank 1.

[0016] Preferably, the medicament is sulfamic acid.

[0017] A closed self-cleaning reserve compensation water supply system, comprising the closed self-cleaning reserve compensation water supply device, further comprising:

[0018] a mixing tank for receiving municipal incoming water output by a municipal pipe network and then pressurizing the water to supply users, and a municipal pipeline is arranged between the mixing tank and the municipal pipe network;

[0019] a water storage pipeline connected to the municipal pipeline and an input end of the inlet pipe 5, and a 1# electric valve 11 is arranged on the water storage pipeline;

[0020] a 3# electric valve 13 arranged on the outlet pipe 6 and located between the Venturi tube 10 and the booster pump 8;

[0021] and a compensation water supply pipeline for leading water in the lower tank 2 to the mixing tank, and the compensation water supply pipeline is connected to the outlet pipe 6 and the mixing tank, and a 2# electric valve 12 is arranged on the compensation water supply pipeline; one end of the compensation water supply pipeline is connected to the outlet pipe 6 and is located between the booster pump 8 and the 3# electric valve 13.

[0022] Preferably, a one-way valve is arranged on the municipal pipeline and the compensation water supply pipeline.

[0023] A use method of a closed self-cleaning reserve compensation water supply system, based on the closed self-cleaning reserve compensation water supply system, comprising a water storage step when water pressure of municipal incoming water is greater than or equal to a set value to form a normal mode, and specifically comprising:

[0024] the 1# electric valve 11 and the inlet electric valve 51 are opened, and the 2# electric valve 12, the 3# electric valve 13, the electromagnetic valve, and the outlet electric valve 61 are closed;

[0025] municipal incoming water flows into the lower tank 2 through the municipal pipeline, the water storage pipeline, and the inlet pipe 5.

[0026] Preferably, it further comprises a self-cleaning step in the normal mode, specifically:

[0027] Step 1, close 1# electric valve 11, 2# electric valve 12, open 3# electric valve 13, electromagnetic valve, water inlet electric valve 51 and water outlet electric valve 61;

[0028] Step 2, start the booster pump 8, and the water flow forms a vortex in the lower water tank 2, and the medicament is sucked into the water through the negative pressure generated by the throat of the Venturi tube 10 to dissolve and flush the scale on the inner wall of the lower water tank 2, thereby achieving self-cleaning;

[0029] Step 3, stop the booster pump 8, open the sewage valve, and then discharge the sewage;

[0030] Step 4, open 1# electric valve 11 and water inlet electric valve 51, and close 2# electric valve 12, 3# electric valve 13, electromagnetic valve and water outlet electric valve 61;

[0031] The municipal water flows into the lower water tank 2 through the municipal pipeline, the water storage pipeline and the water inlet pipe 5 in sequence.

[0032] Preferably, it further comprises a compensation water supply step when the water pressure of the municipal water is lower than the set value to form a peak mode, specifically:

[0033] Close 1# electric valve 11, 3# electric valve 13, electromagnetic valve and water inlet electric valve 51, and open 2# electric valve 12 and water outlet electric valve 61;

[0034] Start the booster pump 8, and the water in the lower water tank 2 flows into the mixing tank through the water outlet pipe 6 and the compensation water supply pipeline in sequence, and merges with the municipal water in the mixing tank to compensate for the insufficient amount of municipal water.

[0035] Compared with the prior art, the advantages of the present application are:

[0036] 1. The diaphragm 4 and the upper water tank 1 form a cavity area, and the cavity area and the lower water tank 2 form a water storage area.

[0037] Therefore, the diaphragm 4 is above the cavity, which achieves air and water isolation, closed water storage, and can solve the pollution problem of water exposed to air in conventional water tanks.

[0038] 2. The water inlet pipe 5 and the water outlet pipe 6 of the water tank are symmetrically installed along the tangent direction of the circle, when self-cleaning is needed, the booster pump is started, the water in the lower water tank 2 is extracted and circulated through the water inlet pipe 5 and the water outlet pipe 6, because the pipeline is installed in the tangent direction, with the high-speed flow of the water, a vortex is gradually generated inside the circular water tank, which can repeatedly flush the scale and other impurities on the inner wall of the water tank.

[0039] Meanwhile, a Venturi tube 10 is arranged on the water outlet pipe 6 and connected to a medicine tank 9. The medicine is sulfamic acid, which is quantitatively inhaled into the lower water tank 2 through the opening and closing of the electromagnetic valve and then dissolves the water scale.

[0040] 3. The system compensates water supply in peak mode and stores water and self-cleans in normal mode. BRIEF DESCRIPTION OF DRAWINGS

[0041] Fig. 1 is a structural diagram of the closed self-cleaning storage compensation water supply device;

[0042] Fig. 2 is a self-cleaning water path diagram of the closed self-cleaning storage compensation water supply system in normal mode;

[0043] Fig. 3 is a storage water path diagram of the closed self-cleaning storage compensation water supply system in normal mode;

[0044] Fig. 4 is a compensation water supply path diagram of the closed self-cleaning storage compensation water supply system in peak mode.

[0045] In the figures, 1 is an upper water tank, 2 is a lower water tank, 3 is a flange assembly, 4 is a diaphragm, 5 is a water inlet pipe, 51 is a water inlet electric valve, 6 is a water outlet pipe, 61 is a water outlet electric valve, 7 is an exhaust valve, 8 is a booster pump, 9 is a medicine storage barrel, 10 is a Venturi tube, 11 is a 1# electric valve, 12 is a 2# electric valve, and 13 is a 3# electric valve. DETAILED DESCRIPTION

[0046] The closed self-cleaning storage compensation water supply device, system and use method of the present application will be described in more detail below with reference to the accompanying drawings, in which the preferred embodiments of the present application are shown. It should be understood that those skilled in the art can modify the present application described herein while still achieving the advantageous effects of the present application. Therefore, the following description should be understood as a broad knowledge for those skilled in the art rather than as a limitation on the present application.

[0047] As shown in Fig. 1, the closed self-cleaning storage compensation water supply device is made of 304 stainless steel and welded.

[0048] A standard water tank (closed self-cleaning storage compensation water supply device) has a size of 2 meters in diameter and 2 meters in height, and an effective storage volume of about 6 cubic meters.

[0049] The closed self-cleaning storage compensation water supply device specifically comprises:

[0050] The upper water tank 1, the upper flange, the lower flange and the lower water tank 2 are sequentially arranged.

[0051] The outer wall of the upper water tank 1 is welded to the inner wall of the upper flange, and the outer wall of the lower water tank 2 (cylindrical) is welded to the inner wall of the lower flange. The exhaust valve is arranged on the upper water tank 1, and the drain valve is arranged on the lower water tank 2.

[0052] The exhaust valve is a breathing cap.

[0053] The blow-off valve can be a manual valve or an electric valve.

[0054] The flange assembly 3 comprises an upper flange and a lower flange.

[0055] The diaphragm 4 is arranged between the upper flange and the lower flange, and the upper flange, the diaphragm 4 and the lower flange are connected by bolts; the diaphragm 4 forms a cavity area with the upper water tank body 1, and forms a water storage area with the lower water tank body 2.

[0056] Therefore, the diaphragm 4 is above the cavity, which can isolate air and water, and can store water in a sealed manner, so as to solve the pollution problem of water exposed to air in a conventional water tank.

[0057] The diaphragm 4 is made of food-grade material to ensure water safety.

[0058] The water inlet pipe 5 and the water outlet pipe 6 are both in communication with the lower water tank body 2 and are both tangent to the lower water tank body 2 in the radial direction, and the output end of the water outlet pipe 6 is connected to the input end of the water inlet pipe 5.

[0059] The water inlet pipe 5 is provided with a water inlet electric valve 51, and the water outlet pipe 6 is provided with a water outlet electric valve 61.

[0060] The booster pump 8 and the Venturi tube 10 are sequentially arranged on the water outlet pipe 6, and an electromagnetic valve is arranged between the throat of the Venturi tube 10 and the medicine barrel 9; water flows into the inlet section of the Venturi tube 10 and flows out of the diffusion section.

[0061] The medicine in the medicine barrel 9 is used to dissolve scale. Specifically, the medicine is sulfamic acid.

[0062] The water inlet electric valve 51, the water outlet electric valve 61 and the booster pump 8 are all connected to the control box.

[0063] As known from the prior art, the control box controls the on-off of the electromagnetic valve through a PCB, and the PCB is connected to the electromagnetic valve.

[0064] Working principle of the closed self-cleaning reserve compensation water supply equipment:

[0065] Water storage principle: when the control box starts to open the water inlet electric valve 51, water flows into the lower water tank body 2 along the water inlet pipe 5, at this time the diaphragm 4 rises with the rising of the water level, and the air in the cavity area is discharged through the breathing cap (exhaust valve), until the water level rises to a high liquid level, the water inlet electric valve 51 is closed, and the water storage process is completed.

[0066] The pressure sensor is used to detect whether the diaphragm 4 rises to a high liquid level, and is arranged on the inner wall of the lower water tank body 2.

[0067] Water outlet principle: through the control box to open the water outlet electric valve 61, start the booster pump 8, the water in the water tank is pumped into the compensation water supply pipeline, the diaphragm 4 in the water tank is lowered with the water level, when the water level drops to low water level (detected by the pressure sensor set on the inner wall of the lower water tank 2), the water outlet electric valve 61 and the booster pump are closed, the water outlet process is completed, and the municipal pressure (water pressure of municipal water) is stabilized to restart the water storage process.

[0068] Self-cleaning principle: the water inlet pipe 5 and the water outlet pipe 6 of the water tank are symmetrically installed along the tangent direction of the circle, when self-cleaning is needed, the booster pump is started, the water in the lower water tank 2 is pumped through the water inlet pipe 5 and the water outlet pipe 6 for internal circulation, because the pipeline is installed in the tangent direction, with the high-speed flow of water, vortex is gradually generated in the circular water tank, which can repeatedly flush the scale and other impurities on the inner wall of the water tank.

[0069] At the same time, a section of venturi tube 10 is installed on the water outlet pipe 6, which is connected to the dosing tank 9, the reagent is sulfamic acid, which is quantitatively inhaled into the lower water tank 2 through the opening and closing of the electromagnetic valve, and the scale is dissolved.

[0070] After the flushing is completed, the booster pump is stopped, the sewage valve is opened, the sewage is discharged, and then part of the clean water is supplemented, the flushing is continued, and then the sewage is discharged, completing the whole self-cleaning operation.

[0071] As shown in Figures 2-4, a closed self-cleaning reserve compensation water supply system comprises:

[0072] Closed self-cleaning reserve compensation water supply equipment;

[0073] Mixing tank for receiving municipal water output by municipal pipe network, then pressurized water supply to users through pump group (1# pump and 2# pump), and municipal pipeline is arranged between the mixing tank and the municipal pipe network.

[0074] The arrangement of components between the mixing tank and the user pipeline, and the connection mode between the components, are prior art.

[0075] Brief introduction as follows:

[0076] Among them, the mixing tank introduces the waterway to the user pipeline through the first branch pipeline and the second branch pipeline. The 1# pump is arranged on the first branch pipeline, and the 2# pump is arranged on the second branch pipeline.

[0077] Water storage pipeline, which connects the municipal pipeline and the input end of the water inlet pipe 5, and the 1# electric valve 11 is arranged thereon;

[0078] 3# electric valve 13 is arranged on the water outlet pipe 6 and located between the venturi tube 10 and the booster pump 8;

[0079] and the compensation water supply pipeline is used for leading the water in the sewer tank 2 to the mixing tank, is connected with the water outlet pipe 6 and the mixing tank, and is provided with a 2# electric valve 12; one end of the compensation water supply pipeline is connected with the water outlet pipe 6 and is located between the booster pump 8 and a 3# electric valve 13.

[0080] The 1# electric valve 11, the 2# electric valve 12 and the 3# electric valve 13 are all connected with the control box.

[0081] Further, the one-way valves are arranged on the municipal pipeline and the compensation water supply pipeline.

[0082] Working principle of the closed self-cleaning reserve compensation water supply system:

[0083] 1. Normal mode: when the water pressure of the municipal water is normal, the equipment is in the pressure-supply water mode, the water pump (1# pump and 2# pump) uses the municipal water pressure to supply water by pressure, so as to achieve the purpose of saving the head work and energy.

[0084] The normal water pressure of the municipal water refers to the water pressure of one end of the municipal pipeline connected with the municipal pipe network, that is, the water pressure of the water flowing into the mixing tank, which is greater than or equal to the set value.

[0085] The pressure detection technology shown in Figs. 2-4 (using a pressure sensor to detect the municipal pressure) belongs to the prior art.

[0086] In the embodiment, the water pressure of the municipal water will fluctuate due to the influence of the water peak and the adjustment sensitivity of the municipal pipe network, and the water pressure at the user remains unchanged.

[0087] Specifically, in the embodiment, the water pressure of the municipal water will fluctuate due to the influence of the water peak and the adjustment of the municipal pipe network, and the equipment mentioned in the application can keep the water pressure at the user unchanged to meet the water demand in the peak period.

[0088] At this time, because the municipal pressure is sufficient, the closed compensation water tank (closed self-cleaning reserve compensation water supply equipment) can be replenished with water, the replenishment electric valve (1# electric valve 11) is opened, the diaphragm 4 rises with the rising of the liquid level, and the 1# electric valve 11 is closed when the upper liquid level is reached to complete the replenishment of water.

[0089] 2. Peak mode: when the water pressure of the municipal water decreases to below the set value, it means that the water inflow decreases, the water outlet electric valve (2# electric valve 12) of the closed compensation water tank is opened, the booster pump is started, and the water in the water tank is pumped out and mixed with the municipal water in the mixing tank to compensate for the lack of water in the municipal water and meet the sudden increase in water demand in the peak period.

[0090] When the water level in the closed compensation water tank drops to a low level, the booster pump is turned off, the municipal pipe network supplies water independently, and the water tank is replenished with water when the water pressure is restored. Specifically, the municipal pipe network will only drop in pressure during peak travel, and after the peak, the overall surrounding water consumption decreases, and the pressure will automatically recover to the set value of the municipal pressure.

[0091] A method for using a closed self-cleaning reserve compensation water supply system, including a water storage step in normal mode, a self-cleaning step in normal mode, and a compensation water supply step in peak mode.

[0092] As shown in FIG. 2, blue is tap water, and yellow is self-cleaning water.

[0093] When the municipal pipe network pressure (water pressure of the municipal water supply) is normal, the water tank can be self-cleaning according to the program, 1# electric valve 11 and 2# electric valve 12 are closed, 3# electric valve 13 is opened, the booster pump is started, and high-speed water flow forms a vortex in the water tank. The agent is also sucked into the water through the negative pressure generated by the Venturi tube to dissolve and flush the scale on the inner wall of the water tank, achieving self-cleaning effect.

[0094] When the water pressure of the municipal water supply is greater than or equal to the set value to form a self-cleaning step in normal mode, specifically:

[0095] Step 1, close 1# electric valve 11 and 2# electric valve 12, open 3# electric valve 13, solenoid valve, water inlet electric valve 51 and water outlet electric valve 61;

[0096] Step 2, start the booster pump 8, the water flow forms a vortex in the lower water tank body 2, the agent is sucked into the water through the negative pressure generated by the throat of the Venturi tube 10 to dissolve and flush the scale on the inner wall of the lower water tank body 2, achieving self-cleaning;

[0097] Step 3, stop the booster pump 8, open the sewage valve, and after discharging sewage;

[0098] Step 4, open 1# electric valve 11 and water inlet electric valve 51, close 2# electric valve 12, 3# electric valve 13, solenoid valve and water outlet electric valve 61;

[0099] The municipal water supply flows into the lower water tank body 2 through the municipal pipe, the water storage pipe and the water inlet pipe 5 in turn.

[0100] As shown in FIG. 3, blue is tap water.

[0101] When the municipal pipe network pressure is normal, the water enters the mixed flow tank through the pipe, and the pump set (1# pump and 2# pump) supplies water by stacking the municipal pipe network pressure, which is economical and energy-saving.

[0102] At this time, if the liquid level in the closed water tank is lower than the high liquid level, 1# electric valve 11 is opened, 2# electric valve 12 and 3# electric valve 13 are closed, and the closed water tank is stored.

[0103] The water storage step when the water pressure of the municipal incoming water is greater than or equal to a set value to form a normal mode, specifically comprising:

[0104] The 1# electric valve 11 and the water inlet electric valve 51 are opened, and the 2# electric valve 12, the 3# electric valve 13, the electromagnetic valve and the water outlet electric valve 61 are closed.

[0105] The municipal incoming water flows into the lower tank body 2 through the municipal pipeline, the water storage pipeline and the water inlet pipe 5.

[0106] When the water storage is completed, the diaphragm 4 protrudes into the upper tank body 1 and forms a preset distance with the top of the upper tank body 1. The diaphragm 4 is made of natural rubber and meets the drinking water standard.

[0107] As shown in FIG. 4, the blue is tap water.

[0108] When the municipal pipeline pressure drops below the set pressure value, the municipal incoming water still enters the mixing tank through the pipeline. At this time, the 1# electric valve 11 and the 3# electric valve 13 are closed, the 2# electric valve 12 is opened, and the booster pump is opened to extract the water in the sealed water tank into the mixing tank to compensate for the insufficient municipal pipeline incoming water. The two water flows are combined in the mixing tank to form a stable pressure and then are supplied to the user through the pump set.

[0109] When the municipal pressure recovers to the set value, the normal mode is switched to run.

[0110] The compensation water supply step when the water pressure of the municipal incoming water is lower than the set value to form a peak mode, specifically comprising:

[0111] The 1# electric valve 11, the 3# electric valve 13, the electromagnetic valve and the water inlet electric valve 51 are closed, and the 2# electric valve 12 and the water outlet electric valve 61 are opened.

[0112] The booster pump 8 is started, and the water in the lower tank body 2 flows into the mixing tank through the water outlet pipe 6 and the compensation water supply pipeline in turn, and is combined with the municipal incoming water in the mixing tank to compensate for the insufficient municipal incoming water.

[0113] The water extracted by the booster pump 8 in the lower tank body 2 and the municipal incoming water are combined in the mixing tank, and the two water flows are combined in the mixing tank to form a stable pressure and then are supplied to the user through the pump set.

[0114] The above is only a preferred embodiment of the present application, and does not limit the present application in any way. Any person skilled in the art can make any form of equivalent replacement, modification or change to the technical solutions and technical contents disclosed in the present application without departing from the scope of the technical solutions of the present application, which still belongs to the protection scope of the present application.

Claims

1. A closed self-cleaning reserve-compensating water supply device, characterized by, It comprises: an upper water tank body (1), an upper flange, a lower flange, and a lower water tank body (2), which are sequentially arranged; the outer wall of the upper water tank body (1) is welded to the inner wall of the upper flange, and the outer wall of the lower water tank body (2) is welded to the inner wall of the lower flange; an exhaust valve is arranged on the upper water tank body (1), and a blowdown valve is arranged on the lower water tank body (2); a diaphragm (4) is arranged between the upper flange and the lower flange, and the upper flange, the diaphragm (4), and the lower flange are connected by fasteners; the diaphragm (4) and the upper water tank body (1) form a cavity area, and the diaphragm (4) and the lower water tank body (2) form a water storage area; a water inlet pipe (5) and a water outlet pipe (6) are both in communication with the lower water tank body (2) and are both tangential to the lower water tank body (2) in a radial direction, and the output end of the water outlet pipe (6) is connected to the input end of the water inlet pipe (5); a water inlet electric valve (51) is arranged on the water inlet pipe (5), and a water outlet electric valve (61) is arranged on the water outlet pipe (6); and a booster pump (8) and a Venturi tube (10) are sequentially arranged on the water outlet pipe (6), an electromagnetic valve is arranged between the throat of the Venturi tube (10) and a medicine storage barrel (9); water flows into the inlet section of the Venturi tube (10) and flows out of the diffusion section thereof; the medicine in the medicine storage barrel (9) is used to dissolve scale.

2. The closed self-cleaning reserve-compensated water supply apparatus according to claim 1, characterized by, When the water storage is completed, the diaphragm (4) protrudes into the upper water tank body (1) and forms a preset distance with the top of the upper water tank body (1).

3. The closed self-cleaning reserve-compensated water supply apparatus according to claim 1, characterized by, The medicine is sulfamic acid.

4. A closed self-cleaning reserve-compensated water supply system comprising the closed self-cleaning reserve-compensated water supply apparatus according to any one of claims 1 to 3, characterized by It further comprises: a mixed flow tank for receiving municipal incoming water output by a municipal pipe network and then pressurizing the water for supply to users, and a municipal pipeline is arranged between the mixed flow tank and the municipal pipe network; a water storage pipeline connecting the municipal pipeline and the input end of the water inlet pipe (5) and having a 1# electric valve (11) arranged thereon; a 3# electric valve (13) arranged on the water outlet pipe (6) and located between the Venturi tube (10) and the booster pump (8); and a compensation water supply pipeline for leading water in the lower water tank (2) to the mixed flow tank, the compensation water supply pipeline connecting the water outlet pipe (6) and the mixed flow tank and having a 2# electric valve (12) arranged thereon; one end of the compensation water supply pipeline is connected to the water outlet pipe (6) and is located between the booster pump (8) and the 3# electric valve (13).

5. The closed self-cleaning reserve compensation water supply system according to claim 4, one-way valves are arranged on the municipal pipeline and the compensation water supply pipeline.

6. A method of using a closed self-cleaning reserve-compensated water supply system according to any one of claims 4 to 5, characterized in that It comprises a water storage step when the water pressure of the municipal incoming water is greater than or equal to a set value to form a normal mode, and specifically comprises: opening the 1# electric valve (11) and the water inlet electric valve (51) and closing the 2# electric valve (12), the 3# electric valve (13), the electromagnetic valve, and the water outlet electric valve (61); the municipal incoming water flows into the lower water tank body (2) through the municipal pipeline, the water storage pipeline, and the water inlet pipe (5).

7. The method of using a closed, self-cleaning reserve-compensating water supply system of claim 6, wherein, It further comprises a self-cleaning step in the normal mode, and specifically comprises: Step 1, closing the 1# electric valve (11) and the 2# electric valve (12) and opening the 3# electric valve (13), the electromagnetic valve, the water inlet electric valve (51), and the water outlet electric valve (61); Step 2, the booster pump (8) starts, the water flow forms a vortex in the lower water tank (2), the medicament is sucked into the water through the negative pressure generated by the throat of the Venturi tube (10), the scale on the inner wall of the lower water tank (2) is dissolved, washed and cleaned, and self-cleaning is realized; Step 3, the booster pump (8) stops, the blowdown valve is opened, and the sewage is discharged; Step 4, the 1# electric valve (11) and the water inlet electric valve (51) are opened, and the 2# electric valve (12), the 3# electric valve (13), the electromagnetic valve and the water outlet electric valve (61) are closed; The municipal inflow water flows into the lower water tank (2) through the municipal pipeline, the water storage pipeline and the water inlet pipe (5) in sequence.

8. The method of using a closed, self-cleaning reserve-compensating water supply system of claim 6, wherein, It also includes a compensation water supply step when the water pressure of the municipal inflow water is lower than the set value to form a peak mode, specifically: The 1# electric valve (11), the 3# electric valve (13), the electromagnetic valve and the water inlet electric valve (51) are closed, and the 2# electric valve (12) and the water outlet electric valve (61) are opened; The booster pump (8) starts, the water in the lower water tank (2) flows into the mixing tank through the water outlet pipe (6) and the compensation water supply pipeline in sequence, and the municipal inflow water is combined in the mixing tank to compensate for the deficiency of the municipal inflow water.

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