Power plant circulating water device

Abstract

The utility model relates to the technical field of industrial circulating water, in particular to a power plant circulating water device which comprises an electric driving unit and a tank body. The electric driving unit is fixedly connected with the upper surface of the tank body, a blow-down valve is fixedly connected to the upper surface of the tank body, an electromagnetic valve is fixedly connected to the upper surface of the blow-down valve, a pressure difference controller is fixedly connected to the side face of the tank body, and the electric driving unit, the electromagnetic valve and the pressure difference controller are connected to the interior of an automatic control box through wires. A micro filter is fixedly connected to the upper end of the tank body, a stainless steel filter screen is arranged in the tank body, and a filter screen upper sealing ring is arranged at the upper end of the stainless steel filter screen. Through the arrangement, the steps of isolation, drainage, filter screen disassembly, cleaning, reassembly, operation recovery and the like are avoided when the stainless steel filter screen is cleaned, the efficiency is improved, manpower and material resources are saved, automatic cleaning of the stainless steel filter screen is achieved, meanwhile, the service life of unit equipment is prolonged, and the operation stability of the unit equipment is improved.

Description

Technical Field

[0001] The present application relates to the technical field of industrial circulating water, and in particular to a circulating water device for a power plant. Background Art

[0002] The main function of the power plant's circulating water device is to provide cooling water to the condenser of the steam turbine to cool the exhaust steam of the condensing turbine. It is an important auxiliary equipment in the power plant. At present, the cooling water for the motor of the large circulating water pump in the power plant uses the self-supplied seawater in the outlet pipe of the circulating water pump. The seawater undergoes multi-stage sedimentation and the action of the rotten screen and the cleaning machine in the forepool of the circulating water pump. Larger marine organisms and debris are removed, but some smaller marine organisms and debris will still remain in the circulating water.

[0003] The existing equipment has the following disadvantages:

[0004] Each time the cooling water filter of the circulating water pump motor is cleaned, it will go through the steps of isolation, draining, removing the filter, cleaning, reinstalling, and resuming operation, which consumes a lot of time and manpower and material resources; it takes about half an hour to clean a single-side filter. In the early summer when catkins are flying and there are many marine organisms such as seaweed and shells, when cleaning a single-side filter, the filter running on the other side will also have a high pressure difference. Failure to clean it in time will cause the temperature of the circulating water pump motor to rise, affecting the normal operation of the circulating water pump; frequent removal of the filter will also cause the filter cover to deform and damage, causing the filter to leak, affecting its service life. Utility Model Content

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a power plant circulating water device, which aims to realize automatic cleaning of the cooling water filter of the circulating water pump motor.

[0006] An embodiment of the present application provides a power plant circulating water device, including an electric drive unit and a tank body; the electric drive unit is fixedly connected to the upper surface of the tank body, a drain valve is fixedly connected to the upper surface of the tank body, a solenoid valve is fixedly connected to the upper surface of the drain valve, a pressure difference controller is fixedly connected to the side of the tank body, the electric drive unit, the solenoid valve and the pressure difference controller are connected to the interior of an automatic control box through electric wires, a micro filter is fixedly connected to the upper end of the tank body, a stainless steel filter is arranged inside the tank body, a filter upper sealing ring is arranged at the upper end of the stainless steel filter, a filter lower sealing ring is arranged at the lower end of the stainless steel filter, a dirt cleaning brush holder is arranged at the lower end of the electric drive unit, and the dirt cleaning brush holder is arranged inside the stainless steel filter.

[0007] In some embodiments, a cotter pin is provided on the side of the cleaning brush holder, and a cylindrical pin is provided inside the cotter pin; the cotter pin and the cylindrical pin are provided on the surface of the cleaning brush holder, which can provide a good buffering effect on the cleaning brush holder. When the equipment is in use, since the cleaning brush holder is integrated, when it operates inside the equipment, due to the large water flow inside the equipment, it is easy to cause certain damage to the cleaning brush holder, making it difficult for the cleaning brush holder to operate normally.

[0008] In some embodiments, a stainless steel spring is fixedly connected to the side of the cleaning brush holder, and a stainless steel brush head is fixedly connected to the end of the stainless steel spring away from the cleaning brush holder; the stainless steel brush head and the cleaning brush holder are connected using a stainless steel spring, which can buffer the stainless steel brush head. The ductility of the stainless steel spring can provide a certain protection for the stainless steel brush head, preventing the stainless steel brush head from cleaning the inside of the stainless steel filter. The stainless steel filter is tightly adsorbed with debris, which is difficult to clean at once, and the stainless steel brush head is easily stuck between the debris and is difficult to rotate for cleaning, causing damage to the electric drive unit.

[0009] In some embodiments, the stainless steel brush head abuts against the interior of the stainless steel filter; the abutment can effectively clean the interior of the stainless steel filter.

[0010] In some embodiments, an end cover sealing ring is provided at the connection between the tank body and the electric drive unit; the end cover sealing ring can protect the connection between the electric drive unit and the tank body, reducing the possibility of liquid leakage at the connection between the electric drive unit and the tank body.

[0011] In some embodiments, the electric drive unit is connected to the tank body using fasteners.

[0012] In some embodiments, the differential pressure controller is connected to a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is used to measure the pressure inside the stainless steel filter, and the second pressure sensor is used to measure the pressure outside the stainless steel filter.

[0013] The beneficial effects of the present application are as follows: Different from the prior art, the embodiment of the present application provides a power plant circulating water device, which, when in use, installs the device at the water inlet pipe in the water circulation system, filters the water entering the device, starts the electric drive unit, rotates the cleaning brush holder, and drives the stainless steel brush head to rotate when the cleaning brush holder rotates. The rotation of the stainless steel brush head cleans the fine dirt on the inner surface of the stainless steel filter. When the stainless steel brush head is cleaning, the stainless steel spring has a wave effect on the stainless steel brush head, which is convenient for the stainless steel brush head to be tightly pressed with the inside of the stainless steel filter, so as to facilitate the cleaning of the stainless steel brush head. Through the above-mentioned arrangement, the steps of isolation, draining, removing the filter, cleaning, reinstalling, and resuming operation are avoided when cleaning the stainless steel filter, which improves efficiency, saves manpower and material resources, realizes automatic cleaning of the stainless steel filter, and at the same time improves the service life of the unit equipment and the stability of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of a circulating water device for a power plant provided in an embodiment of the present application;

[0016] Figure 2 This is a schematic diagram of the structure of an internal electric drive unit of a power plant circulating water device provided in an embodiment of the present application;

[0017] Figure 3 This is a schematic diagram of the structure of a stainless steel filter inside a circulating water device of a power plant provided in an embodiment of the present application;

[0018] Figure 4 It is a schematic diagram of the surface tank structure of a power plant circulating water device provided in an embodiment of the present application;

[0019] Figure 5 It is a working flow diagram of a power plant circulating water device provided in an embodiment of the present application.

[0020] Figure numerals: 1. Electric drive unit; 2. Fastener; 3. Micro filter; 4. End cover sealing ring; 5. Cleaning brush holder; 6. Stainless steel brush head; 7. Stainless steel spring; 8. Stainless steel filter; 9. Pressure difference controller; 10. Tank body; 11. Sealing ring under filter; 12. Sealing ring on filter; 13. Cylindrical pin; 14. Split pin; 15. Drain valve; 16. Solenoid valve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0023] See also Figure 1-5 , Figure 1 is a schematic diagram of the three-dimensional structure of a power plant circulating water device provided in an embodiment of the present application, Figure 2 This is a schematic diagram of the structure of an internal electric drive unit of a power plant circulating water device provided in an embodiment of the present application. Figure 3 This is a schematic diagram of the structure of a stainless steel filter inside a circulating water device in a power plant provided in an embodiment of the present application. Figure 4 This is a schematic diagram of the surface tank structure of a power plant circulating water device provided in an embodiment of the present application. Figure 5 It is a working flow diagram of a power plant circulating water device provided in an embodiment of the present application.

[0024] The power plant circulating water device provided in the embodiment of the present application includes an electric drive unit 1 and a tank body 10; the electric drive unit 1 is fixedly connected to the upper surface of the tank body 10, a drain valve 15 is fixedly connected to the upper surface of the tank body 10, a solenoid valve 16 is fixedly connected to the upper surface of the drain valve 15, a pressure difference controller 9 is fixedly connected to the side of the tank body 10, the electric drive unit 1, the solenoid valve 16 and the pressure difference controller 9 are connected to the inside of the automatic control box through electric wires, a micro filter 3 is fixedly connected to the upper end of the tank body 10, a stainless steel filter screen 8 is arranged inside the tank body 10, a filter screen sealing ring 12 is arranged on the upper end of the stainless steel filter screen 8, and a filter screen sealing ring 12 is arranged on the lower end of the stainless steel filter screen 8. A sealing ring 11 is provided under the net, and a cleaning brush holder 5 is provided at the lower end of the electric drive unit 1. The cleaning brush holder 5 and the internal arrangement of the stainless steel filter screen 8, and the differential pressure controller 9 is connected with a first pressure sensor (not shown) and a second pressure sensor (not shown). The first pressure sensor is used to measure the pressure inside the filter screen, and the second pressure sensor is used to measure the pressure outside the filter screen. The differential pressure controller 9 is used to calculate whether the absolute value of the difference between the internal pressure value and the external pressure value is greater than the differential pressure threshold value. If so, the control information is output to the automatic control box, and the automatic control box controls the drive unit to work to clean the filter screen. At the same time, the control box controls the opening and closing of the solenoid valve 16 to discharge the sewage.

[0025] In some embodiments, a cotter pin 14 is provided on the side of the cleaning brush holder 5, and a cylindrical pin 13 is provided inside the cotter pin 14; the cotter pin 14 and the cylindrical pin 13 are provided on the surface of the cleaning brush holder 5, which can provide a good buffering effect on the cleaning brush holder 5. When using the equipment, since the cleaning brush holder 5 is integrated, when it operates inside the equipment, due to the large water flow inside the equipment, it is easy to cause certain damage to the cleaning brush holder 5, making it difficult for the cleaning brush holder 5 to operate normally.

[0026] In some embodiments, a stainless steel spring 7 is fixedly connected to the side of the cleaning brush holder 5, and a stainless steel brush head 6 is fixedly connected to the end of the stainless steel spring 7 away from the cleaning brush holder 5; the stainless steel spring 7 is used to connect the stainless steel brush head 6 and the cleaning brush holder 5, so as to buffer the stainless steel brush head 6. The ductility of the stainless steel spring 7 can provide a certain protection for the stainless steel brush head 6, and prevent the stainless steel brush head 6 from cleaning the inside of the stainless steel filter 8. The stainless steel filter 8 is tightly adsorbed with debris, which is difficult to clean at once, and the stainless steel brush head 6 is easily stuck between the debris and difficult to rotate for cleaning, causing damage to the electric drive unit 1.

[0027] In some embodiments, the stainless steel brush head 6 abuts against the inside of the stainless steel filter 8; the abutment can effectively clean the inside of the stainless steel filter 8.

[0028] In some embodiments, an end cover sealing ring 4 is provided at the connection between the tank body 10 and the electric drive unit 1; the end cover sealing ring 4 can protect the connection between the electric drive unit 1 and the tank body 10, thereby reducing the possibility of liquid leakage at the connection between the electric drive unit 1 and the tank body 10.

[0029] In some embodiments, the electric drive unit 1 is connected to the tank body 10 using a fastener 2 .

[0030] Working principle: When the circulating water device of the power plant is in use, the device is installed at the water inlet pipe in the water circulation system, the water entering the device is filtered, the electric drive unit 1 is started, the cleaning brush holder 5 is rotated, and the cleaning brush holder 5 drives the stainless steel brush head 6 to rotate when rotating. The stainless steel brush head 6 rotates to clean the fine dirt on the inner surface of the stainless steel filter 8. When the stainless steel brush head 6 is cleaning, the stainless steel spring 7 plays a wave effect on the stainless steel brush head 6, which is convenient for the stainless steel brush head 6 to be tightly pressed with the inside of the stainless steel filter 8, so as to facilitate the cleaning of the stainless steel brush head 6; through the above-mentioned arrangement, the problem of consuming a lot of time, manpower and material resources such as isolation, draining, removing the filter, cleaning, reinstalling and resuming operation each time the stainless steel filter 8 is cleaned is solved, and the automatic cleaning of the stainless steel filter 8 is realized, while the service life and operation stability of the unit equipment are improved.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A circulating water device for a power plant, characterized in that: It includes an electric drive unit and a tank body; the electric drive unit is fixedly connected to the upper surface of the tank body, a drain valve is fixedly connected to the upper surface of the tank body, a solenoid valve is fixedly connected to the upper surface of the drain valve, a pressure difference controller is fixedly connected to the side of the tank body, the electric drive unit, the solenoid valve and the pressure difference controller are connected to the inside of an automatic control box through electric wires, a micro filter is fixedly connected to the upper end of the tank body, a stainless steel filter is arranged inside the tank body, a filter upper sealing ring is arranged at the upper end of the stainless steel filter, a filter lower sealing ring is arranged at the lower end of the stainless steel filter, a dirt cleaning brush holder is arranged at the lower end of the electric drive unit, and the dirt cleaning brush holder is arranged inside the stainless steel filter.

2. The power plant circulating water device according to claim 1, characterized in that: A cotter pin is provided on the side of the cleaning brush holder, and a cylindrical pin is arranged inside the cotter pin.

3. The power plant circulating water device according to claim 2, characterized in that: A stainless steel spring is fixedly connected to the side of the cleaning brush frame, and a stainless steel brush head is fixedly connected to one end of the stainless steel spring away from the cleaning brush frame.

4. The power plant circulating water device according to claim 3, characterized in that: The stainless steel brush head abuts against the interior of the stainless steel filter.

5. The power plant circulating water device according to claim 1, characterized in that: An end cover sealing ring is provided at the connection between the tank body and the electric drive unit.

6. The power plant circulating water device according to claim 5, characterized in that: The electric drive unit is connected to the tank body using fasteners.

7. The power plant circulating water device according to claim 1, characterized in that: The differential pressure controller is connected to a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is used to measure the pressure inside the stainless steel filter, and the second pressure sensor is used to measure the pressure outside the stainless steel filter.

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