CN211234101U - Circulating water constant-pressure water supply system - Google Patents
Circulating water constant-pressure water supply system Download PDFInfo
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- CN211234101U CN211234101U CN201921362074.4U CN201921362074U CN211234101U CN 211234101 U CN211234101 U CN 211234101U CN 201921362074 U CN201921362074 U CN 201921362074U CN 211234101 U CN211234101 U CN 211234101U
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Abstract
The utility model relates to a circulating water constant pressure water supply system, including cooling tower, variable frequency pump, power frequency pump, pressure transmitter, water consuming equipment and circulating pipe, cooling tower connects inlet tube and wet return respectively, and the inlet tube connects variable frequency pump and power frequency pump respectively, is equipped with flow transmitter on the variable frequency pump outlet pipe of variable frequency pump, and variable frequency pump outlet pipe connects variable frequency pump bypass pipe and variable frequency pump branch outlet pipe respectively, and variable frequency pump bypass union coupling governing valve, the governing valve leads to pipe connection to cooling tower, and power frequency pump connects the power frequency pump outlet pipe; the frequency conversion pump outlet pipe and the power frequency pump outlet pipe are connected to a water outlet main pipe in a gathering mode, a pressure transmitter is arranged on the water outlet main pipe, the water outlet main pipe is connected with one end of a water using device, and the other end of the water using device is connected with a water return pipe. This water supply system reduces the energy consumption, improves control accuracy, provides a circulating water constant voltage regulation and control system.
Description
Technical Field
The utility model relates to a circulating water constant voltage water supply system technical field specifically is a circulating water constant voltage water supply system.
Background
In the production of a fine factory, a circulating water system provides a cold source for equipment needing temperature control in the production of a reaction kettle, a condenser and the like. The production line may not be started or stopped at the same time, so that the consumption of the circulating water is not constant. If some production lines stop production, the circulating water consumption is inevitably reduced, but the circulating water pump is still supplying water normally and continuously, and finally the pressure of the pipe network is increased and the flow rate is accelerated. This water supply both wastes electrical energy and reduces the accuracy of the cooling control of the equipment that is still being produced.
Disclosure of Invention
The utility model discloses a reduce the energy consumption, improve control accuracy, provide a circulating water constant voltage regulation and control system.
A circulating water constant pressure water supply system is characterized by comprising:
comprises a cooling water tower, a variable frequency pump, a power frequency pump, a pressure transmitter, a water using device and a circulating water pipe,
the cooling water tower is respectively connected with a water inlet pipe and a water return pipe,
the water inlet pipe is respectively connected with a variable frequency pump and a power frequency pump, a flow transmitter is arranged on a variable frequency pump water outlet pipe of the variable frequency pump, the variable frequency pump water outlet pipe is respectively connected with a variable frequency pump bypass pipe and a variable frequency pump water outlet pipe, the variable frequency pump bypass pipe is connected with an adjusting valve, the adjusting valve is connected to a cooling water tower through a water pipe,
the power frequency pump is connected with a power frequency pump water outlet pipe;
the frequency conversion pump divides the outlet pipe and the power frequency pump outlet pipe to gather and be connected to the outlet manifold, is equipped with pressure transmitter on the outlet manifold, and outlet manifold connects water consuming device one end, and the wet return is connected to the water consuming device other end.
Furthermore, the variable frequency pump, the power frequency pump, the regulating valve and the pressure transmitter are all connected with a controller.
Furthermore, the power frequency pumps are provided with two parallel power frequency pump outlet pipes, the number of the corresponding power frequency pump outlet pipes is two, and the two power frequency pump outlet pipes and the frequency conversion pump branch outlet pipes are connected to the water outlet main pipe after being gathered.
Has the advantages that:
1. the device adopts equipment such as a variable frequency pump, a pressure transmitter and the like, and a controller automatically adjusts the power of the pump according to the water consumption, so that constant-pressure water supply is achieved, and electric energy is saved;
2. the device adopts equipment such as a flow transmitter, a regulating valve and the like, ensures that the variable frequency pump does not operate below the minimum flow, and prolongs the service life of the variable frequency pump;
3. the water outlet of the variable frequency pump is provided with the bypass, so that when the variable frequency pump operates at the minimum flow, redundant water can directly return to the cooling tower without passing through the water using device, the pressure and the flow speed of the water inlet main pipe and the return pipe are not increased, and the cooling control precision of the water using device is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, a circulating water constant pressure water supply system is characterized by comprising:
comprises a cooling water tower 1, a variable frequency pump 3, a power frequency pump 9, a pressure transmitter 12, a water using device 13 and a circulating water pipe,
the cooling water tower 1 is respectively connected with a water inlet pipe 2 and a water return pipe 14,
the water inlet pipe 2 is respectively connected with the variable frequency pump 3 and the power frequency pump 9, the variable frequency pump water outlet pipe 5 of the variable frequency pump 3 is provided with the flow transmitter 4, the variable frequency pump water outlet pipe 5 is respectively connected with the variable frequency pump bypass pipe 6 and the variable frequency pump water outlet pipe 8, the variable frequency pump bypass pipe 6 is connected with the regulating valve 7, the regulating valve 7 is connected to the cooling water tower 1 through a water pipe, and when the flow transmitter 4 detects that the variable frequency pump operates to the minimum flow, the variable frequency pump operates at the minimum flow.
The power frequency pump 9 is connected with a power frequency pump water outlet pipe 10;
the frequency conversion pump divides outlet pipe 8 and power frequency pump outlet pipe 10 to gather and be connected to outlet manifold 11, is equipped with pressure transmitter 12 on the outlet manifold 11, and outlet manifold 11 connects 13 one ends of water consumption device, and water return pipe 14 is connected to 13 other ends of water consumption device.
Furthermore, the variable frequency pump 3, the power frequency pump 9, the regulating valve 7 and the pressure transmitter 12 are all connected with a controller 15. The pressure transmitter 12 transmits the pressure signal to the controller 15, and after the controller 15 operates, the variable frequency pump 3 and the power frequency pump 9 are selectively operated according to the program setting, and meanwhile, the opening degree of the regulating valve 7 is determined. The controller is a DCS system in a fine factory.
Further, the power frequency pumps 9 are arranged side by side, the number of corresponding power frequency pump water outlet pipes is two, and the two power frequency pump water outlet pipes 10 and the frequency conversion pump branch water outlet pipe 8 are connected to the water outlet main pipe 11 after being gathered.
Examples
A circulating water constant pressure water supply system, as shown in figure 1, firstly inputs the equipment parameters of a variable frequency pump 3, a flow transmitter 4, a power frequency pump 9, a pressure transmitter 12 and a regulating valve 7 into a controller 15, when the normal operation is carried out, one power frequency pump 3 and two power frequency pumps 9 are all in full load operation, when the water consumption of a water consumption device 13 is reduced, the pressure transmitter 12 transmits the pressure change of a water outlet main pipe 13 into the controller 15, and the controller 15 gradually reduces the frequency of the variable frequency pump 3 according to closed loop regulation until the pressure value transmitted by the pressure transmitter 12 is the same as a set value.
In the above regulation, when the flow value transmitted by the flow transmitter 4 approaches the minimum flow of the variable frequency pump, the variable frequency pump 4 operates at a constant frequency, and the regulating valve 7 is gradually opened until the pressure value transmitted by the pressure transmitter 12 is the same as the set value.
In the above adjustment, when the regulating valve 7 is opened to the maximum opening and the pressure value transmitted by the pressure transmitter 12 is still higher than the set value, one of the power frequency pumps 9 is stopped, the regulating valve 7 is closed, and the variable frequency pump 3 starts to adjust from 50HZ again until the pressure value transmitted by the pressure transmitter 12 is the same as the set value.
The utility model discloses according to pressure transmitter and flow transmitter's real-time data, through controller analysis back control variable frequency pump, power frequency pump and governing valve, realize the constant voltage control to circulating water system, when reaching the using electricity wisely, the protection variable frequency pump does not go the operation at minimum flow. The utility model relates to a rationally reliable, easy operation is high-efficient, can practice thrift a large amount of economic cost.
Claims (3)
1. A circulating water constant pressure water supply system is characterized by comprising:
a cooling water tower (1), a variable frequency pump (3), a power frequency pump (9), a pressure transmitter (12), a water using device (13) and a circulating water pipe,
the cooling water tower (1) is respectively connected with a water inlet pipe (2) and a water return pipe (14),
the water inlet pipe (2) is respectively connected with the variable frequency pump (3) and the power frequency pump (9), a flow transmitter (4) is arranged on a variable frequency pump water outlet pipe (5) of the variable frequency pump (3), the variable frequency pump water outlet pipe (5) is respectively connected with a variable frequency pump bypass pipe (6) and a variable frequency pump water outlet pipe (8), the variable frequency pump bypass pipe (6) is connected with an adjusting valve (7), the adjusting valve (7) is connected to the cooling water tower (1) through a water pipe,
the power frequency pump (9) is connected with a power frequency pump water outlet pipe (10);
the frequency conversion pump divides outlet pipe (8) and power frequency pump outlet pipe (10) to gather and be connected to outlet manifold (11), is equipped with pressure transmitter (12) on outlet manifold (11), and outlet manifold (11) are connected with water consumption device (13) one end, and return water pipe (14) are connected to water consumption device (13) other end.
2. The circulating water constant pressure water supply system as claimed in claim 1, wherein the variable frequency pump (3), the industrial frequency pump (9), the regulating valve (7) and the pressure transmitter (12) are connected with a controller (15).
3. The circulating water constant pressure water supply system as claimed in claim 1, wherein the industrial frequency pump (9) has two side-by-side power frequency pump outlet pipes (10), and the two industrial frequency pump outlet pipes (10) and the frequency conversion pump branch outlet pipe (8) are connected to the outlet header (11) after being gathered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921362074.4U CN211234101U (en) | 2019-08-21 | 2019-08-21 | Circulating water constant-pressure water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921362074.4U CN211234101U (en) | 2019-08-21 | 2019-08-21 | Circulating water constant-pressure water supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211234101U true CN211234101U (en) | 2020-08-11 |
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ID=71925865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921362074.4U Active CN211234101U (en) | 2019-08-21 | 2019-08-21 | Circulating water constant-pressure water supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211234101U (en) |
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2019
- 2019-08-21 CN CN201921362074.4U patent/CN211234101U/en active Active
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