Intelligent water hammer protection device

Abstract

The utility model discloses an intelligent water hammer protection device, belongs to the technical field of water conservancy and hydropower engineering, and can solve the problems that the air supply is not timely and the air supply amount is difficult to determine because the air amount in the existing non-bag type air tank needs to be manually inspected. The device comprises: an air tank containing a liquid; the liquid level monitoring unit is arranged on the air tank and used for monitoring the liquid level of liquid in the air tank; the inflating and deflating unit is communicated with the top of the air tank and is used for inflating and deflating the air tank; the water supply unit is communicated with the bottom of the air tank and used for supplying water into the air tank; the water supply pressure of the water supply unit is constant; and the water hammer controller is connected with the liquid level monitoring unit and the inflating and deflating unit and is used for controlling the inflating and deflating unit to work according to the liquid level of the liquid in the air tank. The water hammer protection device is used for water hammer protection in water supply projects.

Description

Technical Field

[0001] The utility model relates to an intelligent water hammer protection device, belonging to the technical field of water conservancy and hydropower engineering. Background Art

[0002] Air tanks used for water hammer protection in water supply projects are generally divided into two categories. One is the bagless type, with gas on top and water on the bottom. The gas and water are in direct contact, and the gas dissolves in water quickly. The air compressor needs to be turned on frequently to replenish air. However, the traditional method of deciding whether to replenish air and how much to replenish air depends on manual inspections, which can easily lead to problems such as untimely replenishment, insufficient replenishment, and excessive replenishment. The other is the bagged type, with gas sealed between the bag and the tank body and water in the bag. The gas and water are isolated by the bag, and frequent replenishment is not required. However, the bag is expensive, has uneven quality, and is often broken, and is difficult for the operation and management unit to detect, which seriously weakens the water hammer protection effect. Summary of the invention

[0003] The utility model provides an intelligent water hammer protection device, which can solve the problem that the amount of gas in the existing bagless air tank needs to be manually inspected, resulting in untimely gas replenishment and difficulty in determining the amount of gas replenishment.

[0004] The utility model provides an intelligent water hammer protection device, which comprises:

[0005] An air tank, the contents of which contain liquid;

[0006] A liquid level monitoring unit, disposed on the air tank, for monitoring the liquid level in the air tank;

[0007] An air charging and discharging unit, connected to the top of the air tank, for performing an air charging and discharging operation on the air tank;

[0008] A water supply unit is connected to the bottom of the air tank and is used to supply water into the air tank; the water supply pressure of the water supply unit is constant;

[0009] A water hammer controller is connected to both the liquid level monitoring unit and the gas charging and discharging unit, and is used to control the operation of the gas charging and discharging unit according to the liquid level in the air tank.

[0010] Optionally, the liquid level monitoring unit includes:

[0011] A first liquid level sensor is disposed on the top of the air tank and extends into the air tank;

[0012] The second liquid level sensor is arranged at one side of the air tank and is connected to the air tank through a connecting pipe. The first liquid level sensor and the second liquid level sensor are both used to monitor the liquid level in the air tank.

[0013] Optionally, the first liquid level sensor is a radar liquid level sensor; the second liquid level sensor is an electromagnetic liquid level sensor.

[0014] Optionally, the inflation and deflation unit includes:

[0015] An air replenishing assembly, connected to the top of the air tank, for replenishing gas into the air tank;

[0016] The deflation assembly is communicated with the top of the air tank and is used for releasing the gas in the air tank.

[0017] Optionally, the gas supplement component includes:

[0018] An air compressor, arranged on one side of the air tank, for outputting compressed air;

[0019] An air charging pipe, one end of which is connected to the air compressor, and the other end of which is connected to the top of the air tank;

[0020] The inflation valve is arranged on the inflation tube and is used for opening or closing the inflation tube.

[0021] Optionally, the gas supplement component further includes:

[0022] The check valve is arranged on the inflation pipe at a side of the inflation valve away from the air compressor, and is used to prevent the gas in the air tank from flowing toward the air compressor.

[0023] Optionally, the deflation component includes:

[0024] An air release pipe, one end of which is connected to the top of the air tank;

[0025] The air release valve is arranged on the air release pipe and is used for opening or closing the air release pipe.

[0026] Optionally, ball valves are provided on pipelines on both sides of the inflation valve, the check valve and the deflation valve.

[0027] Optionally, the water hammer controller is used to control the opening or closing of the air compressor, the charging valve and the air release valve according to the relationship between the liquid level in the air tank and a preset air replenishment level and a preset air release level.

[0028] Optionally, the device further comprises:

[0029] A tee pipe, wherein two pipe openings are connected to the connecting pipe;

[0030] A pressure transmitter is connected to the remaining pipe opening of the three-way pipe and is used to monitor the gas pressure in the air tank.

[0031] The beneficial effects that the utility model can produce include:

[0032] The intelligent water hammer protection device provided by the utility model monitors the liquid level in the air tank through the liquid level monitoring unit, and uses the water hammer controller to automatically control the charging and discharging unit to perform charging and discharging operations according to the monitored liquid level, so as to realize automatic adjustment of the liquid level in the air tank. In this way, the real-time monitoring of the gas volume of the bagless air tank is realized, and the existing problems of untimely gas replenishment, insufficient gas replenishment or excessive gas replenishment are solved, and the problem of human interference is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure of an intelligent water hammer protection device provided by an embodiment of the utility model;

[0034] Figure 2 This is a structural block diagram of an intelligent water hammer protection device provided in an embodiment of the utility model.

[0035] Reference numerals:

[0036] 1. Water hammer controller; 2. Air compressor; 3. Ball valve; 4. Charging valve; 5. Pressure transmitter; 6. Electromagnetic liquid level sensor; 7. Deflation valve; 8. Check valve; 9. Radar liquid level sensor; 10. Charging pipe; 11. Pier; 12. Support; 13. Air tank; 14. Water inlet and outlet; 15. Connecting pipe; 16. Deflation pipe. DETAILED DESCRIPTION

[0037] The present invention is described in detail below in conjunction with embodiments, but the present invention is not limited to these embodiments.

[0038] The utility model provides an intelligent water hammer protection device. Figure 1 and Figure 2 As shown, the device comprises:

[0039] The air tank 13 contains liquid.

[0040] The liquid level monitoring unit is arranged on the air tank 13 and is used for monitoring the liquid level in the air tank 13 .

[0041] Specifically, it includes: a first liquid level sensor, which is arranged on the top of the air tank 13 and extends into the air tank 13;

[0042] The second liquid level sensor is disposed at one side of the air tank 13 and is connected to the air tank 13 through the connecting pipe 15 . Both the first liquid level sensor and the second liquid level sensor are used to monitor the liquid level in the air tank 13 .

[0043] Among them, the first liquid level sensor may be a radar liquid level sensor 9 ; the second liquid level sensor may be an electromagnetic liquid level sensor 6 .

[0044] In the embodiment of the utility model, the radar level sensor 9 and the electromagnetic level sensor 6 calibrate each other. If the liquid level values ​​in the air tank 13 monitored by the radar level sensor 9 and the electromagnetic level sensor 6 are the same or have a small difference, such as the difference is less than or equal to the preset error value, the average value monitored by the two is taken as the liquid level in the air tank 13; if the difference in the liquid level in the air tank 13 monitored by the two is greater than the preset error value, it is determined that the radar level sensor 9 and / or the electromagnetic level sensor 6 are faulty, and the technician needs to troubleshoot the radar level sensor 9 and the electromagnetic level sensor 6.

[0045] In practical applications, maintenance valves can be arranged on the respective installation pipelines of the radar liquid level sensor 9 and the electromagnetic liquid level sensor 6 to facilitate the maintenance of the radar liquid level sensor 9 and the electromagnetic liquid level sensor 6. The maintenance valve can be a ball valve 3.

[0046] The inflation and deflation unit is communicated with the top of the air tank 13 and is used for inflating and deflation operations on the air tank 13 .

[0047] Specifically, it includes: a gas replenishing component, which is connected to the top of the air tank 13 and is used to replenish gas into the air tank 13; and a gas releasing component, which is connected to the top of the air tank 13 and is used to release the gas in the air tank 13.

[0048] Among them, the air replenishing component includes: an air compressor 2, which is arranged on one side of the air tank 13 and is used to output compressed air; an inflation pipe 10, one end of which is connected to the air compressor 2 and the other end is connected to the top of the air tank 13; an inflation valve 4, which is arranged on the inflation pipe 10 and is used to open or close the inflation pipe 10.

[0049] Furthermore, the air replenishing component also includes: a check valve 8, which is arranged on the inflation pipe 10 on the side of the inflation valve 4 away from the air compressor 2, and is used to prevent the gas in the air tank 13 from flowing to the air compressor 2.

[0050] The deflation assembly includes: a deflation pipe 16 , one end of which is connected to the top of the air tank 13 ; and a deflation valve 7 , which is arranged on the deflation pipe 16 and is used to open or close the deflation pipe 16 .

[0051] In practical applications, ball valves 3 may be provided on the pipelines on both sides of the inflation valve 4 , the check valve 8 and the deflation valve 7 to facilitate the inspection and maintenance of the inflation valve 4 , the check valve 8 and the deflation valve 7 .

[0052] The water supply unit is communicated with the bottom of the air tank 13 and is used to supply water into the air tank 13 .

[0053] The water supply pressure of the water supply unit is constant. When the liquid level in the air tank 13 is too low, the venting component deflates the air tank 13, and the gas pressure in the air tank 13 is reduced, thereby being lower than the water supply pressure. At this time, the water supply unit will automatically supply water to the air tank 13 until the gas pressure in the air tank 13 is balanced with the water supply pressure again, and the water supply automatically ends.

[0054] The water hammer controller 1 is connected to both the liquid level monitoring unit and the gas charging and discharging unit, and is used to control the operation of the gas charging and discharging unit according to the liquid level in the air tank 13 .

[0055] Specifically, the water hammer controller 1 is used to control the opening or closing of the air compressor 2, the charging valve 4 and the deflation valve 7 according to the size relationship between the liquid level in the air tank 13 and the preset air replenishment level and the preset deflation level.

[0056] In the embodiment of the utility model, the preset gas replenishment level includes the highest liquid level for starting gas replenishment and the lowest liquid level for stopping gas replenishment. The preset gas deflation level includes the lowest liquid level for starting gas deflation and the highest liquid level for stopping gas deflation.

[0057] In actual application, when it is monitored that the liquid level in the air tank 13 is greater than or equal to the maximum liquid level for starting air replenishment, it means that the liquid level in the air tank 13 is too high and air replenishment is required. At this time, the water hammer controller 1 controls the air compressor 2 and the charging valve 4 to open, and the air tank 13 is replenished with air. As the gas in the air tank increases, the liquid level in the tank will drop. When the liquid level in the air tank 13 drops to the minimum liquid level for stopping air replenishment, the water hammer controller 1 controls the air compressor 2 and the charging valve 4 to close, thereby stopping air replenishment.

[0058] When it is monitored that the liquid level in the air tank 13 is less than or equal to the minimum level for starting to deflate, it means that the liquid level in the air tank 13 is too low and there is too much gas, and deflation is required. At this time, the water hammer controller 1 controls the deflation valve 7 to open to deflate the air tank 13. At the same time, the water supply unit automatically supplies water to the tank, so that the gas in the air tank is reduced and the liquid level is increased. When the liquid level in the air tank 13 rises to the maximum level for stopping deflation, the water hammer controller 1 controls the deflation valve 7 to close, thereby stopping deflation.

[0059] The device also includes:

[0060] A tee pipe, two of which are connected to the connecting pipe 15;

[0061] The pressure transmitter 5 is connected to the remaining pipe opening of the tee pipe and is used to monitor the gas pressure in the air tank 13 .

[0062] In actual application, the pressure transmitter 5 is connected to the water hammer controller 1 , and the pressure transmitter 5 sends the real-time monitored gas pressure in the air tank 13 to the water hammer controller 1 , so that the technician can know the gas pressure in the air tank 13 in real time.

[0063] refer to Figure 1 As shown, the bagless air tank is located on the pier 11 and is connected to the water supply unit through the water inlet and outlet 14. A radar level sensor 9 is installed on the top of the air tank and an electromagnetic level sensor 6 is installed on the side to transmit the liquid level in the tank to the water hammer controller 1; a tee is extended laterally below the electromagnetic level sensor 6 and a pressure transmitter 5 is installed to transmit the pressure in the tank to the water hammer controller 1; an air compressor 2 and the air tank are connected by an air charging pipe 10, and an air charging valve 4 is provided on the air charging pipe 10 for inflating the tank, and a check valve 8 is provided for preventing the gas in the tank from flowing back into the air compressor 2; the water hammer controller 1 and the air compressor 2 are located on a common support 12.

[0064] In specific implementation, the maximum liquid level for starting air replenishment, the minimum liquid level for stopping air replenishment, the minimum liquid level for starting air release, and the maximum liquid level for stopping air release can be set on the water hammer controller 1 according to the hydraulic transition analysis result. In this way, the opening or closing of the air compressor 2, the charging valve 4, and the air release valve 7 can be controlled by comparing the size relationship between the liquid level in the monitored air tank 13 and the above four set liquid levels.

[0065] The water hammer protection device provided by the utility model can transmit various monitoring signals to the water hammer controller 1 and the central control in real time, without manual inspection. The air compressor 2, the charging valve 4, and the air release valve 7 are all controlled by the water hammer controller 1, and the air replenishment is timely and accurate. The action program in the water hammer controller 1 can be freely set according to the engineering parameters.

[0066] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. An intelligent water hammer protection device, characterized in that: The device comprises: An air tank, the contents of which contain liquid; A liquid level monitoring unit, disposed on the air tank, for monitoring the liquid level in the air tank; An air charging and discharging unit, connected to the top of the air tank, for performing an air charging and discharging operation on the air tank; A water supply unit is connected to the bottom of the air tank and is used to supply water into the air tank; the water supply pressure of the water supply unit is constant; A water hammer controller is connected to both the liquid level monitoring unit and the gas charging and discharging unit, and is used to control the operation of the gas charging and discharging unit according to the liquid level in the air tank.

2. The device according to claim 1, characterized in that The liquid level monitoring unit comprises: A first liquid level sensor is disposed on the top of the air tank and extends into the air tank; The second liquid level sensor is arranged at one side of the air tank and is connected to the air tank through a connecting pipe. The first liquid level sensor and the second liquid level sensor are both used to monitor the liquid level in the air tank.

3. The device according to claim 2, characterized in that The first liquid level sensor is a radar liquid level sensor; the second liquid level sensor is an electromagnetic liquid level sensor.

4. The device according to claim 1, characterized in that The gas charging and discharging unit comprises: An air replenishing assembly, connected to the top of the air tank, for replenishing gas into the air tank; The deflation assembly is communicated with the top of the air tank and is used for releasing the gas in the air tank.

5. The device according to claim 4, characterized in that The gas supplement component comprises: An air compressor, arranged on one side of the air tank, for outputting compressed air; An air charging pipe, one end of which is connected to the air compressor, and the other end of which is connected to the top of the air tank; The inflation valve is arranged on the inflation tube and is used for opening or closing the inflation tube.

6. The device according to claim 5, characterized in that The gas supplement component also includes: The check valve is arranged on the inflation pipe at a side of the inflation valve away from the air compressor, and is used to prevent the gas in the air tank from flowing toward the air compressor.

7. The device according to claim 6, characterized in that The deflation assembly comprises: An air release pipe, one end of which is connected to the top of the air tank; The air release valve is arranged on the air release pipe and is used for opening or closing the air release pipe.

8. The device according to claim 7, characterized in that Ball valves are arranged on pipelines on both sides of the inflation valve, the check valve and the deflation valve.

9. The device according to claim 7, characterized in that The water hammer controller is used to control the opening or closing of the air compressor, the charging valve and the deflation valve according to the size relationship between the liquid level in the air tank and the preset air replenishment level and the preset deflation level.

10. The device according to claim 2, characterized in that The device also includes: A tee pipe, wherein two pipe openings are connected to the connecting pipe; A pressure transmitter is connected to the remaining pipe opening of the three-way pipe and is used to monitor the gas pressure in the air tank.

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