A high-efficiency energy-saving power equipment for circulating water pump

Abstract

The utility model discloses a kind of circulating water pump high-efficiency energy-saving power equipment, including frequency conversion cabinet, water pump and electric regulating valve for controlling pipeline flow by pipeline series connection;Water pump is driven by frequency conversion power unit;Several electric control valves, pressure sensors, flow sensors and temperature sensors are arranged in pipeline;PLC controller and frequency converter and matched electrical components are installed in frequency conversion cabinet;Pressure sensor, flow sensor and temperature sensor are connected by PLC controller communication in frequency conversion cabinet, PLC controller and frequency converter are connected electric control valve in cooperative control, and frequency converter controls connection frequency conversion power unit.The utility model can effectively improve energy efficiency, and prolong equipment life.

Description

Technical Field

[0001] This utility model relates to the technical field of industrial circulating cooling water systems, and in particular to a high-efficiency and energy-saving power equipment for circulating water pumps. Background Technology

[0002] Currently, traditional circulating water pump systems use asynchronous motors driven by industrial frequency. Flow and pressure control are achieved by manually adjusting valve openings, and system startup relies on direct industrial frequency starting or star-delta reduced-voltage starting. This results in the following drawbacks of existing circulating water pump drive methods: 1. Low energy efficiency: Valve throttling leads to significant energy loss due to valve resistance, resulting in low system efficiency; 2. High starting shock: Industrial frequency starting current can reach 5-7 times the rated current, easily damaging the motor and piping network; 3. Inefficient control: Relying on manual experience to adjust valves, it cannot match real-time operating conditions; 4. Cumbersome startup procedure: Equipment startup requires manual on-site valve operation; 5. High maintenance costs: Frequent mechanical valve operation leads to wear and requires periodic replacement.

[0003] Traditional circulating water pump systems use power frequency control cabinets that are directly connected to a fixed-frequency power supply. They control the start and stop of the motor through components such as contactors and relays, but cannot adjust the speed. Furthermore, in the current technology, the working environment around the circulating water pump system is quite humid, and the power frequency cabinet is greatly affected by the humidity in the working environment. After long-term operation, the electrical components inside the power frequency control cabinet will be damaged by moisture, increasing maintenance costs. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency and energy-saving power device for circulating water pumps, which can effectively improve energy efficiency and extend equipment life.

[0005] The present invention adopts the following technical solution: A high-efficiency and energy-saving power equipment for circulating water pumps includes a frequency converter cabinet, a water pump connected in series through pipelines, and an electric regulating valve for controlling the flow rate of the pipelines; The water pump is driven by a variable frequency power unit; The pipeline is equipped with several electrically controlled valves, pressure sensors, flow sensors, and temperature sensors; The frequency converter cabinet contains a PLC controller, a frequency converter, and supporting electrical components. Pressure sensors, flow sensors, and temperature sensors are connected via a PLC controller inside the frequency converter cabinet. The PLC controller and the frequency converter work together to control the electrically controlled valves, and the frequency converter controls the frequency converter power unit.

[0006] Optionally, the variable frequency drive unit includes a permanent magnet synchronous motor, which is mechanically connected to the pump shaft.

[0007] Optionally, the variable frequency drive unit includes a variable frequency motor, which is mechanically connected to the water pump shaft.

[0008] Optionally, a mounting plate is bolted to the rear wall inside the frequency converter cabinet, and the PLC controller, frequency converter, and supporting electrical components are all connected to the mounting plate.

[0009] Optionally, two sets of moisture-proof components are symmetrically arranged on both sides of the inside of the frequency converter cabinet, and a dustproof and heat dissipation mesh fixed to the frequency converter cabinet is arranged on the outside of the moisture-proof components.

[0010] Optionally, the moisture-proof component includes a U-shaped placement frame and a moisture-proof frame. The upper end of the moisture-proof frame is equipped with a cap, and the moisture-proof frame is adapted to the placement frame. The lower end of the moisture-proof frame is equipped with a locking component connected to the placement frame. The moisture-proof frame is equipped with several spaced partitions, and the cavity between each two partitions is filled with activated alumina particles. The surface of each partition is provided with several filter holes with a diameter smaller than that of the activated alumina particles.

[0011] Optionally, the locking component includes a locking block, which is disposed on the lower end face of the moisture-proof frame. A rectangular through groove adapted to the locking block is provided on the lower end face of the frame. Sliding grooves are symmetrically provided on both sides of the locking block. A trapezoidal locking block is slidably disposed in the sliding groove. A spring is connected between the locking block and the inner wall of the sliding groove.

[0012] Optionally, an auxiliary heat dissipation mechanism is provided behind the mounting plate. The auxiliary heat dissipation mechanism includes a sliding frame arranged symmetrically on the upper and lower sides and a lifting drive assembly used to drive the sliding frame to move up and down. A rotating plate is provided between the two lifting drive assemblies, and a drive motor is fixedly installed on the rear side of the outside of the frequency converter cabinet.

[0013] Optionally, filters are installed on all four vertical sides of the sliding frame. The sliding frame passes through the end face of the frequency converter cabinet and slides in cooperation with it. Several sets of cooling fans are fixedly installed inside the lower sliding frame.

[0014] Optionally, the lifting drive assembly includes a support rod, a connecting rod, and U-shaped frames symmetrically arranged on both sides of the support rod, with the U-shaped frames fixed to the frequency converter cabinet; The upper end of the support rod is fixed to the sliding frame, the contact end of the support rod and the connecting rod are hinged, and the other end of the connecting rod is hinged to the rotating plate.

[0015] In summary, this utility model has the following beneficial effects: 1. In this utility model, the pressure sensor, flow sensor and temperature sensor are connected through a PLC controller in the frequency converter cabinet. The PLC controller and the frequency converter work together to control the electrically controlled valve. The frequency converter controls the frequency converter power unit. Through the feedback signals of the pressure sensor, flow sensor and temperature sensor, the coordinated control of pressure-flow-temperature is realized, which effectively improves energy efficiency and extends the equipment life. 2. In this utility model, when the flow sensor detects a low flow rate, the PLC automatically closes the electric regulating valve to prevent the water pump from running dry; when the temperature sensor exceeds the limit, the frequency converter immediately stops and issues an alarm signal, automatically switching to the standby frequency converter power unit for operation. 3. In this embodiment, the drying effect of activated alumina particles can filter the air passing through the dustproof heat dissipation mesh, absorb the moisture in it, and remove the moisture in the frequency converter cabinet, ensuring the safe use of electrical components in the frequency converter cabinet. In addition, the placement frame for placing activated alumina particles is easy to disassemble and maintain through the locking component. 4. In this embodiment, when the temperature inside the frequency converter cabinet is too high, the drive motor drives the sliding frames on the upper and lower sides to slide out of the frequency converter cabinet, and then the cooling fan is started. The cooling fan draws air from the outside into the frequency converter cabinet, effectively improving the heat dissipation effect inside the frequency converter cabinet. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the architecture of this utility model; Figure 2 This is a schematic diagram of the overall structure of the frequency converter of this utility model; Figure 3 This is a schematic diagram of the internal structure of the frequency converter of this utility model; Figure 4 This is a schematic diagram of the moisture-proof component structure of this utility model. Figure 1 ; Figure 5 This is a schematic diagram of the moisture-proof component structure of this utility model. Figure 2 ; Figure 6 In this utility model Figure 5 A magnified view of the details at point A; Figure 7 This is a schematic diagram of the auxiliary heat dissipation mechanism of this utility model. Figure 1 ; Figure 8 This is a schematic diagram of the auxiliary heat dissipation mechanism of this utility model. Figure 2 .

[0017] In the diagram, 1. Variable frequency cabinet; 11. Dustproof heat dissipation mesh; 2. Auxiliary heat dissipation mechanism; 3. Moisture-proof component; 4. Hanging plate; 21. Sliding frame; 211. Filter screen one; 22. Rotating plate; 221. Drive motor; 23. Lifting drive component; 231. Support rod; 2311. Sliding plate; 232. U-shaped frame; 233. Guide shaft; 234. Spring one; 235. Connecting rod; 31. Placement frame; 311. Through groove; 32. Moisture-proof frame; 321. Partition; 33. Cover; 34. Locking component; 341. Locking block; 342. Slide groove; 343. Locking block; 344. Spring two. Detailed Implementation

[0018] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0019] Please see Figure 1-8 The present invention will now be described in detail with reference to the accompanying drawings and embodiments: Example 1: like Figure 1 As shown, a high-efficiency and energy-saving power equipment for circulating water pumps includes a frequency converter cabinet 1, a water pump connected in series through pipelines, and an electric regulating valve for controlling the flow rate of the pipelines. The water pump is driven by a variable frequency power unit; The pipeline is equipped with several electrically controlled valves, pressure sensors, flow sensors, and temperature sensors; The frequency converter cabinet contains a PLC controller, a frequency converter, and supporting electrical components. Pressure sensors, flow sensors, and temperature sensors are connected via a PLC controller inside the frequency converter cabinet. The PLC controller works with the frequency converter to control the electrically controlled valves, and the frequency converter controls the frequency converter power unit. By using feedback signals from pressure sensors, flow sensors, and temperature sensors, coordinated control of pressure, flow, and temperature can be achieved, effectively improving energy efficiency and extending equipment life. It also includes a backup variable frequency power unit. When the temperature sensor exceeds the limit, the inverter will immediately stop and issue an alarm signal, and automatically switch to the backup variable frequency power unit for operation. The power grid frequency power is converted into adjustable frequency AC power by a frequency converter, thereby controlling the variable frequency power unit to drive the water pump. With the help of an electric regulating valve, the flow rate and pressure can be dynamically adjusted. In this embodiment, the frequency conversion drive unit includes an IE5 series high-efficiency permanent magnet synchronous motor. The high-efficiency permanent magnet synchronous motor is mechanically connected to the water pump shaft, and with the control of the frequency converter, stepless speed regulation is achieved.

[0020] Specifically, when the flow sensor detects a low flow rate, the PLC controller automatically reduces the electric regulating valve to prevent the water pump from running dry. When the temperature sensor exceeds the limit, the frequency converter immediately stops and issues an alarm signal.

[0021] like Figure 1-2 As shown in this embodiment, two sets of moisture-proof components 3 are symmetrically arranged on the two side walls inside the frequency converter cabinet 1. A dustproof heat dissipation net 11 fixed to the frequency converter cabinet 1 is arranged on the outside of the moisture-proof component 3. The dustproof heat dissipation net 11 ensures normal heat dissipation inside the frequency converter cabinet 1 and prevents external dust from entering the frequency converter cabinet 1. The moisture-proof component 3 prevents moisture in the outside air from entering the frequency converter cabinet 1 and damaging the internal electrical components.

[0022] like Figure 3-4 As shown, in this embodiment, a mounting plate 4 is fixedly installed on the rear side wall inside the frequency converter cabinet 1 by bolts. The PLC controller, frequency converter, and supporting electrical components are all fixedly installed on the mounting plate 4. like Figure 5-7 As shown, in this embodiment, the moisture-proof component 3 includes a U-shaped placement frame 31 and a moisture-proof frame 32. The upper end of the moisture-proof frame 32 is detachably provided with a cover 33 by bolts. The moisture-proof frame 32 is adapted to the placement frame 31. A locking component 34 is provided at the lower end of the moisture-proof frame 32, which makes the connection between the moisture-proof frame 32 and the placement frame 31 more stable.

[0023] like Figure 5 As shown, in this embodiment, a number of spaced partitions 321 are welded inside the moisture-proof frame 32, and the cavity between each two partitions 321 is filled with activated alumina particles. The surface of the partition 321 is provided with several filter holes, which can block alumina particles while ensuring that air can enter and exit. The drying effect of activated alumina particles can filter the air passing through the dustproof heat dissipation mesh 11, absorb the moisture in it, and remove the moisture in the frequency converter cabinet 1, ensuring the safe use of the electrical components in the frequency converter cabinet 1. The aforementioned activated alumina particles are existing technology and will not be described in detail here.

[0024] like Figure 6-7 As shown, in this embodiment, the locking component 34 includes a locking block 341, which is fixedly disposed on the lower end face of the moisture-proof frame 32. The lower end face of the placement frame 31 is provided with a rectangular through groove 311 that matches the locking block 341. The locking block 341 has symmetrical grooves 342 on both sides, and a trapezoidal locking block 343 is slidably disposed in the groove 342. A spring 344 is fixedly connected between the locking block 343 and the inner wall of the groove 342. When the moisture-proof frame 32 is placed into the placement frame 31, the locking block 341 passes through the through groove 311, and at the same time, the locking block 343 is squeezed and slides into the sliding groove 342. The second spring 344 is compressed. When the locking block 343 passes the opening of the through groove 311, the second spring 344 rebounds and drives the locking block 343 to reset. At this time, the moisture-proof frame 32 and the placement frame 31 are locked. This connection method can facilitate the disassembly and maintenance of the moisture-proof frame 32.

[0025] Example 2: In order to improve the heat dissipation effect inside the frequency converter cabinet 1, an auxiliary heat dissipation mechanism 2 is provided behind the mounting plate 4, based on the first embodiment. The auxiliary heat dissipation mechanism 2 is used to improve the heat dissipation effect inside the frequency converter cabinet 1.

[0026] like Figure 3-4 As shown, in this embodiment, the auxiliary heat dissipation mechanism 2 includes a sliding frame 21 symmetrically arranged vertically and a lifting drive assembly 23 for driving the sliding frame 21 to move vertically. A rotating plate 22 is arranged between the two lifting drive assemblies 23, and a drive motor 221 is fixedly arranged on the rear side of the outside of the frequency converter cabinet 1. The four vertical sides of the sliding frame 21 are each equipped with a filter screen 211 for filtering dust. The sliding frame 21 passes through the end face of the frequency converter cabinet 1 and slides.

[0027] like Figure 4 As shown, in this embodiment, the lifting drive assembly 23 includes a support rod 231, a connecting rod 235, and a U-shaped frame 232 symmetrically arranged on both sides of the support rod 231. The U-shaped frame 232 is fixed to the frequency converter cabinet 1 by bolts. The upper end of the support rod 231 is fixed to the sliding frame 21 by bolts. The contact end of the support rod 231 and the connecting rod 235 are hinged together, and the other end of the connecting rod 235 is hinged together with the rotating plate 22. The drive motor 221 drives the rotating plate 22 to rotate, which in turn drives the connecting rod 235 to move. The connecting rod 235 can drive the support rod 231 to move up and down between the two U-shaped frames 232.

[0028] like Figure 4 As shown, in this embodiment, a guide shaft 233 is fixedly installed inside the U-shaped frame 232, and sliding plates 2311 are fixedly installed on both sides of the support rod 231. The guide shaft 233 passes through the sliding plate 2311 for sliding engagement, and a spring 234 sleeved on the outside of the guide shaft 233 is fixedly connected between the sliding plate 2311 and the inner bottom surface of the U-shaped frame 232. When the support rod 231 drives the sliding frame 21 to move upward, causing the filter screen 211 to slide out of the frequency converter cabinet 1, the spring 234 will generate a stretching amount. When the support rod 231 drives the sliding frame 21 to descend and return to its original position, the top plate of the sliding frame 21 can close the end face of the frequency converter cabinet 1, and at the same time, the spring 234 assists the support rod 231 to reset.

[0029] In this embodiment, a number of cooling fans are fixedly installed in the sliding frame 21 located below. These cooling fans are existing technology and will not be described in detail here. When the temperature inside the frequency converter cabinet 1 is too high, the drive motor 221 drives the sliding frames 21 on the upper and lower sides to slide out of the frequency converter cabinet 1, and then the cooling fan is started. The cooling fan draws air from the outside into the frequency converter cabinet 1 to cool down the internal electrical components.

[0030] Example 3: The variable frequency drive unit includes the IE5 series high-efficiency variable frequency motor. The high-efficiency variable frequency motor is mechanically connected to the water pump shaft, and stepless speed regulation is achieved in conjunction with the frequency converter.

[0031] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0032] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0033] The foregoing description illustrates and describes several preferred embodiments of this application. However, as previously stated, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A high-efficiency and energy-saving power equipment for circulating water pumps, characterized in that: Includes a frequency converter cabinet, a water pump connected in series via pipes, and an electric regulating valve for controlling the flow rate in the pipes; The water pump is driven by a variable frequency power unit; The pipeline is equipped with several electrically controlled valves, pressure sensors, flow sensors, and temperature sensors; The frequency converter cabinet contains a PLC controller, a frequency converter, and supporting electrical components. Pressure sensors, flow sensors, and temperature sensors are connected via a PLC controller inside the frequency converter cabinet. The PLC controller works with the frequency converter to control the electrically controlled valves, and the frequency converter controls the frequency converter power unit. Two sets of moisture-proof components are symmetrically arranged on both sides of the inside of the frequency converter cabinet. Dustproof and heat dissipation mesh that is fixed to the frequency converter cabinet is installed on the outside of the moisture-proof components. The moisture-proof component includes a U-shaped placement frame and a moisture-proof frame. The upper end of the moisture-proof frame is equipped with a cover and is compatible with the placement frame. The lower end of the moisture-proof frame is equipped with a locking component that connects to the placement frame. The moisture-proof frame contains several spaced partitions, and the cavity between each pair of partitions is filled with activated alumina particles. The surface of each partition has several filter holes with a diameter smaller than that of the activated alumina particles.

2. The high-efficiency and energy-saving power equipment for circulating water pumps according to claim 1, characterized in that: The variable frequency drive unit includes a permanent magnet synchronous motor, which is mechanically connected to the water pump shaft.

3. The high-efficiency and energy-saving power equipment for circulating water pumps according to claim 1, characterized in that: The variable frequency drive unit includes a variable frequency motor, which is mechanically connected to the water pump shaft.

4. The high-efficiency and energy-saving power equipment for circulating water pumps according to claim 1, characterized in that: The rear wall inside the frequency converter cabinet is fixed with a mounting plate by bolts. The PLC controller, frequency converter, and supporting electrical components are all connected to the mounting plate.

5. The high-efficiency and energy-saving power equipment for circulating water pumps according to claim 1, characterized in that: The locking component includes a locking block, which is located on the lower end face of the moisture-proof frame. A rectangular through groove adapted to the locking block is opened on the lower end face of the frame. Sliding grooves are symmetrically opened on both sides of the locking block. A trapezoidal locking block is slidably arranged in the sliding groove. A spring is connected between the locking block and the inner wall of the sliding groove.

6. The high-efficiency and energy-saving power equipment for circulating water pumps according to claim 4, characterized in that: An auxiliary heat dissipation mechanism is provided behind the mounting plate. The auxiliary heat dissipation mechanism includes a sliding frame arranged symmetrically on the upper and lower sides and a lifting drive assembly used to drive the sliding frame to move up and down. A rotating plate is provided between the two lifting drive assemblies. A drive motor is fixedly installed on the rear side of the outside of the frequency converter cabinet.

7. The high-efficiency and energy-saving power equipment for circulating water pumps according to claim 6, characterized in that: The sliding frame is equipped with a filter screen on each of its four vertical sides. The sliding frame passes through the end face of the frequency converter cabinet and slides in a sliding fit. Several sets of cooling fans are fixedly installed inside the lower sliding frame.

8. The high-efficiency and energy-saving power equipment for circulating water pumps according to claim 7, characterized in that: The lifting drive assembly includes a support rod, a connecting rod, and U-shaped frames symmetrically arranged on both sides of the support rod. The U-shaped frames are fixed to the frequency converter cabinet. The upper end of the support rod is fixed to the sliding frame, the contact end of the support rod and the connecting rod are hinged, and the other end of the connecting rod is hinged to the rotating plate.

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