A power plant circulating water pump optimal operation device

Abstract

The utility model discloses a power plant circulating water pump optimization operation device, including the bottom plate, the bottom plate is fixedly connected with frequency conversion water pump and power frequency water pump, the frequency conversion water pump is connected with the connecting pipe, and the one end of connecting pipe is connected power frequency water pump away from frequency conversion water pump, the middle part of connecting pipe is connected with the filter pipe, and the one end of filter pipe is connected with the water inlet pipe away from connecting pipe, the frequency conversion water pump is connected with the confluence pipe, and the confluence pipe is connected with power frequency water pump, the check valve is provided on the confluence pipe, and this device can dynamic regulation flow.

Description

Technical Field

[0001] This utility model belongs to the field of circulating water pump technology and relates to an optimized operation device for power plant circulating water pumps. Background Technology

[0002] The output of auxiliary equipment in thermal power plants varies with the generator load, and the grid load is constantly changing. Therefore, the generator output power and the output of auxiliary equipment must be adjusted accordingly. As one of the main auxiliary equipment in thermal power plants, the output of circulating water pumps should vary with the seasons and unit load, based on the requirements of maintaining unit vacuum and regulating circulating water flow. However, current power plant circulating water pump optimization devices on the market operate at a fixed speed using the industrial frequency, and cannot dynamically adjust the flow rate according to unit load and seasonal temperature differences (such as changes in condenser cooling water inlet temperature), resulting in significant energy waste during low-load periods. Therefore, to solve the above problems, we need to design a power plant circulating water pump optimization device. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a power plant circulating water pump optimization device that can dynamically adjust the flow rate.

[0004] To achieve the above objectives, this utility model discloses an optimized operation device for power plant circulating water pumps, including a base plate. A variable frequency water pump and a fixed frequency water pump are fixedly connected to the base plate. A connecting pipe is connected to the variable frequency water pump, and the end of the connecting pipe away from the variable frequency water pump is connected to the fixed frequency water pump. A filter pipe is connected to the middle of the connecting pipe, and an inlet pipe is connected to the end of the filter pipe away from the connecting pipe. A confluence pipe is connected to the variable frequency water pump and is connected to the fixed frequency water pump. A check valve is installed on the confluence pipe.

[0005] Furthermore, water outlet pipes are provided on both sides of the confluence pipe, one of which is fixedly connected to the variable frequency water pump, and the other is fixedly connected to the power frequency water pump. A check plate is rotatably connected to the check valve.

[0006] Furthermore, flow sensors are installed on both sides of the connecting pipe, and a controller is installed on the power frequency water pump.

[0007] Furthermore, a housing is fixedly connected to the base plate, a frequency converter is connected inside the housing, a power supply cable is installed on the frequency converter, and a switch is connected to the power supply cable.

[0008] Furthermore, the variable frequency water pump is equipped with a connection box, and a power supply connection line is provided in the connection box, which is connected to the variable frequency controller.

[0009] Furthermore, the filter tube is provided with a placement groove, the placement groove is provided with a guide groove, the two sides of the placement groove are provided with fixing grooves, the filter tube is movably connected with a movable seat, and the filter tube is provided with a ring clamp.

[0010] Furthermore, a filter element is fixedly connected to the movable seat, filter screens are connected to both sides of the filter element, guide plates are connected to both sides of the movable seat, and grooves are provided on the movable seat.

[0011] Furthermore, a sliding rod is fixedly connected to the groove, a spring is fixedly connected to the groove, a wedge is fixedly connected to the spring, a pull plate is fixedly connected to the wedge, and the wedge is slidably connected to the sliding rod.

[0012] Furthermore, a screw is fixedly connected to the ring, a positioning nut is threaded onto the screw, and a movable groove is provided on the ring.

[0013] Furthermore, both the variable frequency water pump and the fixed frequency water pump are fixedly connected to a heat dissipation frame, the heat dissipation frame is provided with a connecting plate, the connecting plate is fixedly connected to a motor, and the motor is fixedly connected to a rotating fan.

[0014] This utility model has the following beneficial effects: In practical operation, the power plant circulating water pump optimization device described in this utility model can operate in four modes: single variable frequency pump, single fixed frequency pump, parallel operation of one fixed frequency pump and one variable frequency pump, and parallel operation of two fixed frequency pumps, through the use of variable frequency pumps and fixed frequency pumps. This allows the device to dynamically adjust the flow rate according to the unit load and seasonal temperature differences, facilitating adjustments based on the season and unit load, and simplifying the device's operation. Furthermore, when the variable frequency pump and fixed frequency pump are pumping water, the water can move through the inlet pipe to the filter pipe, where impurities are adsorbed. After the impurities are adsorbed, the water enters the variable frequency pump and fixed frequency pump through the connecting pipe. By setting the pump power, the device can direct the water flow to the confluence pipe. Moreover, when the speed of the variable frequency pump decreases, a check valve can prevent backflow of water from the variable frequency pump, thus avoiding disruption to the normal operation of the device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view of the overall structure of this utility model; Figure 2 This is a rear view schematic diagram of the overall structure of this utility model; Figure 3 This is a schematic diagram of the merging pipe in this utility model; Figure 4 This is a schematic diagram of the ring clamp in this utility model; Figure 5 This is a schematic diagram of the filter element in this utility model; Figure 6 This is a schematic diagram of the filter screen in this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this utility model, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0019] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0020] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this invention generally indicates that the preceding and following objects have an "or" relationship.

[0021] It should be understood that although terms such as first, second, third, etc., may be used to describe the preset range in the embodiments of this utility model, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from one another. For example, without departing from the scope of the embodiments of this utility model, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0022] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0024] The accompanying drawings show various structural schematic diagrams according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged and may have been omitted for clarity. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0025] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The power plant circulating water pump optimization operation device of this utility model includes a base plate 1. A variable frequency water pump 2 and a fixed frequency water pump 3 are fixedly connected to the base plate 1. A connecting pipe 4 is connected to the variable frequency water pump 2. The end of the connecting pipe 4 away from the variable frequency water pump 2 is connected to the fixed frequency water pump 3. A filter pipe 5 is connected to the middle of the connecting pipe 4. A water inlet pipe 6 is connected to the end of the filter pipe 5 away from the connecting pipe 4. A confluence pipe 9 is connected to the variable frequency water pump 2. The end of the confluence pipe 9 away from the variable frequency water pump 2 is connected to the fixed frequency water pump 3. A check valve 8 is provided on the confluence pipe 9.

[0026] Specifically, by connecting the variable frequency pump 2 and the fixed frequency pump 3 in parallel, the device can operate in various modes, such as single variable frequency operation, single fixed frequency operation, or a combination of both. This facilitates the device's ability to dynamically adjust the flow rate based on unit load and seasonal temperature differences, allowing for adjustments based on seasons and unit load, thus simplifying operation. Furthermore, when the variable frequency pump 2 and the fixed frequency pump 3 are pumping water simultaneously, the water can move through the inlet pipe 6 to the filter pipe 5, where impurities are adsorbed. After the impurities are adsorbed, the water flows through the connecting pipe 4 into the variable frequency pump 2 and the fixed frequency pump 3. By setting the pump power, the device can direct the water flow to the confluence pipe 9. Additionally, when the speed of the variable frequency pump 2 decreases, the check valve 8 prevents backflow of water from the variable frequency pump 2, thus avoiding disruption to the normal operation of the device.

[0027] Please see Figures 1-3 The confluence pipe 9 has two outlet pipes 7 connected to its end. One outlet pipe 7 is fixedly connected to the variable frequency water pump 2, and the other outlet pipe 7 is fixedly connected to the fixed frequency water pump 3. A check plate 11 is rotatably connected to the check valve 8. Flow sensors 10 are installed on both sides of the connecting pipe 4, and a controller 12 is installed on the fixed frequency water pump 3. A housing 14 is fixedly connected to the base plate 1, and a variable frequency controller 15 is fixedly connected to the housing 14. A power supply cable 16 is installed on the variable frequency controller 15, and a switch 17 is connected to the power supply cable 16. A connection box 13 is installed on the variable frequency water pump 2, and a power supply connection line 18 is installed in the connection box 13, which is connected to the variable frequency controller 15. Heat dissipation frames 19 are fixedly connected to both the variable frequency water pump 2 and the fixed frequency water pump 3. A connection plate 20 is installed in the heat dissipation frame 19, and a motor 21 is fixedly connected to the connection plate 20. A rotating fan 22 is fixedly connected to the motor 21.

[0028] Specifically, by connecting the variable frequency pump 2 and the fixed frequency pump 3 in parallel, when circulating water is discharged from the pumps, the water discharged from the pumps will move through the outlet pipe 7 to the check valve 8, and then flow through the check plate 11 into the confluence pipe 9. Furthermore, when the device operates with one fixed frequency pump and one variable frequency pump in parallel, when the speed of the variable frequency pump 2 decreases, its flow rate decreases, while the flow rate of the fixed frequency pump 3 increases due to its fixed speed. When the speed of the variable frequency pump 2 decreases to a certain value, its output flow rate becomes zero. At this point, the parallel operation is essentially equivalent to one pump operating at a time. The fixed-frequency water pump 3 operates independently. If the speed of the variable-frequency water pump 2 is further reduced, the check valve 8 and check plate 11 can prevent some of the flow from the fixed-frequency water pump 3 from flowing back into the variable-frequency water pump 2, thus affecting the normal operation of the device. Furthermore, the speed of the fixed-frequency water pump 3 can be controlled by the controller 12, the variable-frequency water pump 2 can be controlled by the variable-frequency controller 15, and the flow sensor 10 can detect the flow rate of the water pump group when water enters the variable-frequency water pump 2 and the fixed-frequency water pump 3. When the variable-frequency water pump 2 and the fixed-frequency water pump 3 are working, the rotating fan 22 can be rotated by the motor 21 to cool the water pump group.

[0029] Please see Figures 1-5 The filter tube 5 is provided with a placement groove 32, a guide groove 33, and fixing grooves 34 on both sides of the placement groove 32. A movable seat 23 is movably connected to the filter tube 5, and a ring clamp 35 is provided on the filter tube 5. A screw 36 is fixedly connected to the ring clamp 35, and a positioning nut 37 is threadedly connected to the screw 36. A movable groove 38 is provided on the ring clamp 35.

[0030] Specifically, when installing the filter tube 5, the movable seat 23 is placed into the placement groove 32, and the ring 35 is moved to the gap in the placement groove 32. By rotating the positioning nut 37, it moves on the screw 36, causing the ring 35 to tighten, thereby fixing the movable seat 23 in the placement groove 32. At the same time, since the contact surface between the movable seat 23 and the placement groove 32 is made of rubber, when the ring 35 causes the movable seat 23 to tighten, leakage of water when passing through the filter tube 5 can be avoided.

[0031] Please see Figures 1-6 A filter element 24 is fixedly connected to the movable seat 23. Filter screens 25 are fixedly connected to both sides of the filter element 24. Guide plates 26 are fixedly connected to both sides of the movable seat 23. A groove 31 is provided on the movable seat 23. A slide rod 27 is fixedly connected to the groove 31. A spring 28 is fixedly connected to the groove 31. A wedge block 29 is connected to the spring 28. A pull plate 30 is fixedly connected to the wedge block 29. The wedge block 29 is slidably connected to the slide rod 27.

[0032] Specifically, when water enters the filter pipe 5 through the inlet pipe 6, larger particles in the water can be filtered out by the filter screen 25. Simultaneously, the filter element 24, being a polypropylene filter element, further removes suspended solids, rust, and other impurities, improving the filtration effect and preventing a large amount of impurities from accumulating in the circulating cooling water, which would reduce its cooling efficiency. Furthermore, cooling water filled with impurities can easily clog the transport pipes. When it is necessary to remove the filter element 24, the ring clamp 35 is opened and moved along the filter pipe 5 to allow it to... Leave the placement groove 32 area and pull the pull plate 30 to retract the wedge 29, causing the wedge 29 to leave the fixed groove 34. This allows the movable seat 23 to be removed, and the filter element 24 to be cleaned and replaced. Then, place the cleaned or new movable seat 23 and filter element 24 into the placement groove 32. During placement, insert the guide plate 26 into the guide groove 33 to insert the movable seat 23 into the filter tube 5, and fix the wedge 29 into the fixed groove 34 to secure the movable seat 23, facilitating filtration when water passes through the filter tube 5.

[0033] Other embodiments of this utility model will readily conceive of by those skilled in the art upon consideration of the specification and disclosure thereof. This application is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this utility model are indicated by the following claims.

[0034] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

[0035] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A device for optimizing the operation of circulating water pumps in power plants, characterized in that, Includes a base plate (1), on which a variable frequency water pump (2) and a power frequency water pump (3) are fixedly connected. A connecting pipe (4) is connected to the variable frequency water pump (2), and the end of the connecting pipe (4) away from the variable frequency water pump (2) is connected to the power frequency water pump (3). A filter pipe (5) is connected to the middle of the connecting pipe (4), and an inlet pipe (6) is connected to the end of the filter pipe (5) away from the connecting pipe (4). A confluence pipe (9) is connected to the variable frequency water pump (2), and the confluence pipe (9) is connected to the power frequency water pump (3). A check valve (8) is provided on the confluence pipe (9).

2. The power plant circulating water pump optimized operation device according to claim 1, characterized in that, Both sides of the confluence pipe (9) are provided with water outlet pipes (7), one of which is fixedly connected to the variable frequency water pump (2), and the other is fixedly connected to the power frequency water pump (3). A check plate (11) is rotatably connected in the check valve (8).

3. The optimized operation device for power plant circulating water pumps according to claim 1, characterized in that, Flow sensors (10) are provided on both sides of the connecting pipe (4), and a controller (12) is provided on the power frequency water pump (3).

4. The power plant circulating water pump optimized operation device according to claim 3, characterized in that, A housing (14) is fixedly connected to the base plate (1), and a frequency converter (15) is connected in the housing (14). A power supply cable (16) is provided on the frequency converter (15), and a switch (17) is connected to the power supply cable (16).

5. The power plant circulating water pump optimized operation device according to claim 4, characterized in that, The variable frequency water pump (2) is provided with a connection box (13), and a power supply connection line (18) is provided in the connection box (13). The power supply connection line (18) is connected to the variable frequency controller (15).

6. The optimized operation device for power plant circulating water pumps according to claim 1, characterized in that, The filter tube (5) is provided with a placement groove (32), the placement groove (32) is provided with a guide groove (33), the two sides of the placement groove (32) are provided with fixing grooves (34), the filter tube (5) is movably connected with a movable seat (23), and the filter tube (5) is provided with a ring clamp (35).

7. The optimized operation device for power plant circulating water pumps according to claim 6, characterized in that, A filter element (24) is fixedly connected to the movable seat (23), and filter screens (25) are connected to both sides of the filter element (24). Guide plates (26) are connected to both sides of the movable seat (23), and grooves (31) are provided on the movable seat (23).

8. The power plant circulating water pump optimized operation device according to claim 7, characterized in that, A slide rod (27) is fixedly connected in the groove (31), a spring (28) is fixedly connected in the groove (31), a wedge (29) is fixedly connected in the spring (28), a pull plate (30) is fixedly connected on the wedge (29), and the wedge (29) is slidably connected to the slide rod (27).

9. The power plant circulating water pump optimized operation device according to claim 6, characterized in that, A screw (36) is fixedly connected to the ring (35), a positioning nut (37) is threaded onto the screw (36), and a movable groove (38) is provided on the ring (35).

10. The optimized operation device for power plant circulating water pumps according to claim 1, characterized in that, Both the variable frequency water pump (2) and the power frequency water pump (3) are fixedly connected to a heat dissipation frame (19). A connecting plate (20) is provided in the heat dissipation frame (19). A motor (21) is fixedly connected to the connecting plate (20). A rotating fan (22) is fixedly connected to the motor (21).

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