CN110700349A - Secondary water supply equipment hydraulic detection system and detection method - Google Patents

Abstract

The invention belongs to the technical field of secondary water supply, and in particular relates to a hydraulic detection system and detection method for secondary water supply equipment, comprising a water tank, a water inlet hose and a water outlet hose connected to the equipment to be detected, and the equipment to be detected is connected to the frequency conversion to be detected. The upper end of the water tank is connected to the water return pipe, and the side of the lower end of the water tank is provided with a water outlet pipe. The booster pipeline is merged into the booster pump outlet pipe, and the booster pump outlet pipe is connected with the water inlet hose; the present invention can realize the joint operation of various forms and specifications of secondary water supply equipment and control cabinets test. Secondary water supply equipment has various forms of pressure-stabilized stacking, water tank stacking, frequency conversion constant pressure, compensation stacking, mobile pumping station), all of which can be tested on this platform.

Description

Secondary water supply equipment hydraulic detection system and detection method

technical field

The invention belongs to the technical field of secondary water supply, and in particular relates to a hydraulic detection system and detection method for secondary water supply equipment.

Background technique

For urban secondary pressurized water supply equipment, the equipment and control cabinet cannot be inspected jointly before leaving the factory, and only simple inspections can be carried out separately. The equipment is tested for mechanical part airtightness, that is, the equipment is deemed qualified if it does not leak water. The frequency conversion control cabinet is only tested for appearance and wiring firmness.

The equipment cannot run, equipment noise, vibration, operation stability, various data testing, function testing, etc. cannot be carried out, the control parameters of equipment operation cannot be calibrated, and the quality of the entire equipment cannot be guaranteed.

As a result, the equipment can only be debugged and run after the installation of the project and the conditions for water and electricity supply. The technicians need to go to the project site to debug, simulate the user's water consumption, operate the site to explore, and set various operating parameters. In this way, the construction period is long, the equipment acceptance is slow, the cost of labor travel is increased, the return of funds is slow, the burden on the enterprise is heavy, the quality of the equipment is not guaranteed, and the on-site maintenance and replacement is difficult.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a secondary water supply equipment hydraulic detection system and detection method, which can be used to simulate the operation of the project, and can realize the joint operation inspection of various forms and specifications of secondary water supply equipment and control cabinets.

The hydraulic detection system for secondary water supply equipment of the present invention includes a water tank, a water inlet hose and a water outlet hose connected to the equipment to be detected, the equipment to be detected is connected to the frequency conversion cabinet to be detected, the upper end of the water tank is connected to the return pipe, and the water tank The side of the lower end is provided with a water outlet pipe, the water outlet pipes are respectively connected with the first booster pipeline and the second booster pipeline, and the first booster pipeline and the second booster pipeline merge into the booster pump outlet pipe , the water outlet pipe of the booster pump is connected with the water inlet hose, the first booster pump and the first water outlet valve are respectively set on the first booster pipeline, and the second booster pump is respectively set on the second booster pipeline The pump and the second water outlet valve, the water outlet hose and the water tank are connected through a water return pipe, and a parallel pressure reduction circuit is arranged on the return water pipe, and the pressure reduction circuit is divided into a first pressure reduction circuit and a second pressure reduction circuit. A decompression circuit, the first decompression circuit is connected in series with a first decompression circuit valve and a first decompression valve, and the second decompression circuit is sequentially connected in series with a second decompression circuit valve and a second decompression The valve group, the electromagnetic flowmeter and the return water electric valve are respectively arranged on the return water pipe.

Further preferably, a Y-type filter is also provided on the return pipe, and the Y-type filter, the second pressure gauge and the electromagnetic flowmeter are located on the return pipe pipeline between the decompression circuit and the water outlet hose; the return water The electric valve and the first pressure gauge are located on the return pipe line between the decompression circuit and the water tank.

Further preferably, the return pipe is provided with a bell mouth through the part located inside the water tank, and the lower end of the bell mouth is welded with a decompression orifice plate.

Further preferably, the second pressure reducing valve group is composed of two or more pressure reducing valves.

Further preferably, the first pressure gauge and the second pressure gauge are respectively provided on both sides of the decompression circuit.

Further preferably, it also includes a control cabinet, a computer and a printer.

Further preferably, a water outlet electromagnetic flowmeter and an on-off valve are respectively provided on the water outlet pipe.

Further preferably, metal hoses are used for the water inlet hose and the water outlet hose.

The detection method of the hydraulic detection system of the secondary water supply equipment comprises the following steps:

1) Connect the water inlet of the equipment to be tested with the water inlet hose, and the water outlet with the water outlet hose, open all valves on the water outlet pipe and return pipe of the water tank, and choose to open the first valve according to the specifications and models of the equipment to be tested. A booster pump or a second booster pump, or open at the same time, select a decompression circuit according to the specification and model of the equipment to be tested, and close the unused decompression circuit;

2) Perform automatic start-up detection on the equipment to be tested. The computer sends an instruction to the control cabinet to close the water inlet electric valve, start the selected booster pump, and slowly open the water inlet electric valve to slowly increase the pressure of the outlet pipe of the booster pump. , when the pressure of the outlet pipe of the booster pump reaches the set value of the equipment to be tested, observe whether it can automatically start;

3), the equipment to be tested is automatically shut down to detect, close the electric valve of the return water, detect the operating frequency of the equipment, set this frequency as the automatic sleep frequency of the equipment, and detect whether it is shut down;

4) The equipment to be tested is tested for protection shutdown, and the first water outlet valve or the second water outlet valve is slowly closed, so that the pressure of the water outlet pipe of the booster pump is slowly reduced, and the equipment to be tested is detected when the pressure of the water outlet pipe of the booster pump decreases to the point where it stops. Whether the operation can be automatically stopped when the pressure is protected;

5) Alternately run the detection booster pump, adjust the opening degree of the water inlet electric valve and the return water electric valve, so that the equipment to be tested keeps one of the first booster pump or the second booster pump running, and detect its 2- 4 hours to change the pump operation function is normal.

Compared with the prior art, the advantages of the present invention are:

The invention can realize the joint operation inspection of the secondary water supply equipment and the control cabinet in various forms and specifications. Secondary water supply equipment has various forms of pressure-stabilized stacking, water tank stacking, frequency conversion constant pressure, compensation stacking, and mobile pumping stations), all of which can be tested on this platform. The equipment has various specifications, flow and head, and can be detected on the platform, which realizes the inspection of the whole equipment, fills the gap of the factory inspection, and improves the factory inspection level of the enterprise products. Guarantee the quality of products leaving the factory, reduce failure points and hidden dangers of equipment, facilitate data analysis, and provide data support for energy saving and consumption reduction of equipment upgrades. Reduce maintenance costs, labor costs, and travel costs. Shorten the engineering debugging time, and the enterprise can collect the payment faster. The operation is convenient, intuitive and scientific.

Description of drawings

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

In the figure: 1. Equipment to be tested; 2. Water inlet hose; 3. Water inlet electric valve; 4. First booster pump; 5. Second booster pump; 6. Control cabinet; 7. Outlet electromagnetic flowmeter ;8, computer; 9, printer; 10, outlet pipe; 11, water tank; 12, bell mouth; 13, return water pipe; 14, return water electric valve; 15, first pressure gauge; 16, second pressure reducing valve group ; 17, the first pressure reducing valve; 18, the first pressure reducing circuit valve; 19, the second pressure reducing circuit valve; 20, the second pressure gauge; 21, the Y filter; 22, the electromagnetic flowmeter; 23, the first Two water outlet valve; 24, water outlet hose; 25, water outlet pipe of booster pump; 26, first water outlet valve; 27, water outlet; 28, water inlet.

Detailed ways

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

The hydraulic detection system for secondary water supply equipment as shown in FIG. 1 includes a water tank 11 and a water inlet hose 2 and a water outlet hose 24 connected to the equipment to be tested 1. The equipment to be tested 1 is connected to the frequency conversion cabinet to be tested. The water tank The upper end of 11 is connected to the water return pipe 13, and the side of the lower end of the water tank 11 is provided with a water outlet pipe 10. The water outlet pipe 10 is respectively provided with a water outlet electromagnetic flowmeter 7 and an on-off valve. The second booster pipeline, the first booster pipeline and the second booster pipeline merge into the booster pump outlet pipe 25, and the booster pump outlet pipe 25 is communicated with the water inlet hose 2. The first booster pump 4 and the first water outlet valve 26 are respectively set on the booster pipeline, the second booster pump 5 and the second water outlet valve 23 are respectively set on the second booster pipeline, and the water outlet hose 24 is connected to the water tank. 11 are connected through a return pipe 13, and a parallel decompression circuit is set on the return pipe 13. The decompression circuit is divided into a first decompression circuit and a second decompression circuit. The first decompression circuit The first pressure-reducing circuit valve 18 and the first pressure-reducing valve 17 are connected in series, the second pressure-reducing circuit is connected in series with the second pressure-reducing circuit valve 19 and the second pressure-reducing valve group 16, and the return pipe 13 are respectively provided with an electromagnetic flow meter 22 and a return water electric valve 14; the return water pipe 13 is also provided with a Y-type filter 21, and the Y-type filter 21 filters impurities in the water to prevent impurities in the equipment to be detected 1 from entering the water tank 11 , the Y-type filter 21, the second pressure gauge 20 and the electromagnetic flowmeter 22 are located on the return pipe 13 between the decompression circuit and the water outlet hose 24; the return water electric valve 14 and the first pressure gauge 15 On the return pipe 13 between the decompression circuit and the water tank 11.

1. Among them, the return pipe 13 is provided with a bell mouth 12 through the part located inside the water tank 11, and the lower end of the bell mouth 12 is welded with a decompression orifice plate to reduce the return water pressure and reduce the impact of the return water on the water tank 11; The pressure valve group 16 is composed of two or more pressure reducing valves; the first pressure gauge 15 and the second pressure gauge 20 are respectively provided on both sides of the pressure reducing circuit, and the water inlet hose 2 and the water outlet hose 24 are metal hoses. The end of the metal hose is welded with a flange, which is convenient for connecting various reducing diameters, so as to be suitable for various specifications and types of equipment to be inspected.

Among them, it also includes a control cabinet 6 , a computer 8 and a printer 9 .

The water tank 11 simulates the urban water source, the water outlet pipe 10 to the booster pump outlet pipe 25 simulates the urban water supply pipe network, the first booster pump 4 and the second booster pump 5 are set as one large flow rate and one small flow rate, and the electromagnetic flow rate of the water outlet is matched. Meter 7, providing a variety of changes in the size of the water source.

The decompression circuit depressurizes the water outlet of the device 1 to be detected, and reduces the impact of the return water on the water tank 11 . It is divided into a first decompression circuit and a second decompression circuit. The first decompression circuit has a moderate decompression force, and the second decompression circuit has a larger decompression force. Due to their parallel arrangement, they can be used separately or simultaneously according to specific conditions. The pipeline from the decompression circuit to the return water pipe 13 near the water tank 11 simulates user water consumption, the return water electric valve 14 simulates the user water tap, and the opening size simulates the change of user water consumption.

The working principle of the present invention:

The water in the water tank 11 enters the first booster pipeline and the second booster pipeline through the water outlet pipe 10, and after being pressurized by the first booster pump 4 and the second booster pump 5, enters the equipment to be tested 1 through the water inlet 28 , and the water outlet 27 of the equipment to be tested 1 is decompressed through the decompression circuit and then flows back to the water tank 11, so as to realize the simulated detection under the condition that the equipment is connected to water and electricity. The control cabinet 6 collects and detects the pressure and flow signals on the outlet pipe 10 and the return pipe 13 of the platform, and transmits the signals to the computer 8, specifically the first pressure gauge 15, the outlet water, which is electrically connected to each pipeline through the control cabinet 6. It is realized by the electromagnetic flowmeter 7 , the electromagnetic flowmeter 22 and the second pressure gauge 20 . The technician operates the computer 8, issues operating instructions to the control cabinet, selects the first booster pump 4 and the second booster pump 5 to start and stop, adjusts the opening and closing of the water inlet electric valve 3 and the return water electric valve 14, and realizes the equipment to be tested 1 various functional tests. The control cabinet 6 of the equipment to be tested 1 outputs data to the notebook computer 8, such as voltage, current, frequency, operating time, number of operating units, and fault points. The computer 8 controls the printer 9, and can print out the operating data and fault reports.

The detection method of the hydraulic detection system of the secondary water supply equipment comprises the following steps:

1), the equipment to be tested 1 and its control cabinet 6 are placed on the monitoring platform, the power cord and the signal line are connected, the water inlet 28 of the equipment to be tested 1 is connected to the water inlet hose 2, and the water outlet 27 is connected to the water outlet Connect the hoses 24, open all the valves on the water outlet pipe 10 and the water return pipe 13 of the water tank 11, and select to open the first booster pump 4 or the second booster pump 5, or both, according to the specifications and models of the equipment 1 to be tested. Select the decompression circuit according to the specification and model of the equipment to be tested 1, and close the unused decompression circuit;

2) Perform automatic power-on detection on the equipment 1 to be tested. The computer 8 sends an instruction to the control cabinet 6 to close the water inlet electric valve 3, start the selected booster pump, and slowly open the water inlet electric valve 3 to make the booster pump out. The pressure of the water pipe 25 rises slowly, and when the pressure of the water pipe 25 of the booster pump reaches the set value of the equipment 1 to be tested, observe whether it can be automatically started;

3), the equipment 1 to be tested performs automatic shutdown detection, closes the return water electric valve 14, detects the operating frequency of the equipment, sets this frequency as the automatic sleep frequency of the equipment, and detects whether it is shut down;

4), the equipment to be tested 1 performs protection shutdown detection, slowly closes the first water outlet valve 26 or the second water outlet valve 23, so that the pressure of the booster pump outlet pipe 25 is slowly reduced, and detects that the equipment to be tested 1 is used as the booster pump outlet pipe. 25 When the pressure is reduced to its shutdown protection pressure, can it automatically stop running;

5) Alternately run the detection booster pump, adjust the opening degree of the water inlet electric valve 3 and the return water electric valve 14, so that the equipment to be tested 1 keeps one of the first booster pump 4 or the second booster pump 5 running. , check whether the pump operation function is normal in 2-4 hours.

In addition, quality inspections are included:

1. Airtightness detection, observe whether the equipment is leaking or leaking.

2. Pressure test, increase the inlet and outlet pressure of the equipment, and observe whether the equipment is leaking or leaking under high pressure.

3. 24-hour inspection. Check whether the equipment has been running for a long time, and whether the noise and machine temperature are normal.

4. Test report output. The notebook computer 8 collects the operation data transmitted by the frequency conversion control cabinet 6 of the equipment to be tested 1, such as voltage, current, frequency, running time, fault point, etc., collects the flow and pressure data transmitted by the master control cabinet, and generates the pump operation curve and data report. output by the printer 9 .

In the description of the present invention, the orientation or positional relationship indicated by the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "top", "bottom", etc. are based on the drawings The illustrated orientation or positional relationship is only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

Claims (9)

1. The utility model provides a secondary water supply equipment hydraulic detection system, includes water tank (11) and with inlet hose (2) and outlet hose (24) that await measuring equipment (1) is connected, waits to detect that equipment (1) is being connected and is waiting to detect inverter cabinet, its characterized in that: the water return pipe (13) is connected to the upper end of the water tank (11), a water outlet pipe (10) is arranged on the side portion of the lower end of the water tank (11), the water outlet pipe (10) is respectively connected with a first pressurizing pipeline and a second pressurizing pipeline, the first pressurizing pipeline and the second pressurizing pipeline are converged into a pressurizing pump water outlet pipe (25), the pressurizing pump water outlet pipe (25) is communicated with a water inlet hose (2), the first pressurizing pipeline is respectively provided with a first pressurizing pump (4) and a first water outlet valve (26), the second pressurizing pipeline is respectively provided with a second pressurizing pump (5) and a second water outlet valve (23), the water outlet hose (24) is communicated with the water tank (11) through the water return pipe (13), the water return pipe (13) is provided with pressure reducing loops which are connected in parallel, the pressure reducing loop which is connected in series is divided into a first pressure reducing loop and a second pressure reducing loop, and the first pressure reducing loop is sequentially provided with a first pressure reducing loop valve (18) and, and a second pressure reducing loop valve (19) and a second pressure reducing valve group (16) are sequentially connected to the second pressure reducing loop in series, and an electromagnetic flowmeter (22) and a water return electric valve (14) are respectively arranged on the water return pipe (13).

2. The hydraulic detection system of the secondary water supply equipment according to claim 1, characterized in that: a Y-shaped filter (21) is further arranged on the water return pipe (13), and the Y-shaped filter (21), a second pressure gauge (20) and an electromagnetic flowmeter (22) are positioned on a pipeline of the water return pipe (13) between the pressure reduction loop and the water outlet hose (24); the backwater electric valve (14) and the first pressure gauge (15) are positioned on a backwater pipe (13) between the pressure reducing loop and the water tank (11).

3. The hydraulic detection system of the secondary water supply equipment according to claim 1 or 2, characterized in that: the water return pipe (13) is provided with a bell mouth (12) through a part positioned in the water tank (11), and the lower end of the bell mouth (12) is welded with a pressure reduction pore plate.

4. The hydraulic detection system of the secondary water supply equipment according to claim 1, characterized in that: the second pressure reducing valve group (16) consists of two or more pressure reducing valves.

5. The hydraulic detection system of the secondary water supply equipment according to claim 1, characterized in that: a first pressure gauge (15) and a second pressure gauge (20) are respectively arranged on two sides of the decompression loop.

6. The hydraulic detection system of the secondary water supply equipment according to claim 1, characterized in that: also comprises a control cabinet (6), a computer (8) and a printer (9).

7. The hydraulic detection system of the secondary water supply equipment according to claim 1, characterized in that: the water outlet pipe (10) is respectively provided with a water outlet electromagnetic flowmeter (7) and an on-off valve.

8. The hydraulic detection system of the secondary water supply equipment according to claim 1, characterized in that: the water inlet hose (2) and the water outlet hose (24) are metal hoses.

9. A detection method using the hydraulic detection system of the secondary water supply equipment according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:

1) connecting a water inlet (28) of the equipment (1) to be detected with a water inlet hose (2), connecting a water outlet (27) with a water outlet hose (24), opening all valves on a water outlet pipe (10) and a water return pipe (13) of a water tank (11), selectively opening a first booster pump (4) or a second booster pump (5) according to the specification model of the equipment (1) to be detected, or simultaneously opening, selecting a pressure reduction loop according to the specification model of the equipment (1) to be detected, and closing the pressure reduction loop which is not used;

2) the method comprises the following steps of carrying out automatic start-up detection on equipment (1) to be detected, sending an instruction to a control cabinet (6) by a computer (8), closing a water inlet electric valve (3), starting a selected booster pump, slowly opening the water inlet electric valve (3), slowly increasing the pressure of a water outlet pipe (25) of the booster pump, and observing whether the automatic start of the booster pump can be realized when the pressure of the water outlet pipe (25) of the booster pump reaches a set value of the equipment (1) to be detected;

3) the device (1) to be detected is automatically stopped and detected, the backwater electric valve (14) is closed, the running frequency of the device is detected, the frequency is set as the automatic dormancy frequency of the device, and whether the device is stopped or not is detected;

4) the device (1) to be detected performs protection shutdown detection, slowly closes the first water outlet valve (26) or the second water outlet valve (23) to slowly reduce the pressure of the water outlet pipe (25) of the booster pump, and detects whether the device (1) to be detected can automatically stop running when the pressure of the water outlet pipe (25) of the booster pump is reduced to the shutdown protection pressure;

5) the booster pumps are alternately operated and detected, the opening degrees of the water inlet electric valve (3) and the water return electric valve (14) are adjusted, so that the equipment to be detected (1) keeps one pump of the first booster pump (4) or the second booster pump (5) to operate, and whether the pump changing operation function is normal or not within 2-4 hours is detected.