A working fluid cooler for a vacuum pump of an air-cooled unit
Patent Information
- Application Number
- CN202522580564.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-04
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-04
AI Technical Summary
In the working fluid cooler of the vacuum pump in an air-cooled unit, scale and sediment are easily deposited on the heat exchange tubes, which increases thermal resistance and affects heat transfer efficiency.
A cooler structure including a cleaning connecting plate and a brush was designed. The cleaning connecting plate is driven by a motor to slide along the inner wall of the condensation chamber, and the brush scrapes the impurities on the pipe wall. Combined with the openable and closable recovery chamber structure, the impurities can be cleaned and discharged in real time.
It effectively removes scale and sediment from the walls of heat exchange tubes, reduces thermal resistance, and improves heat exchange efficiency and the overall heat exchange effect of the cooler.
Smart Images
Figure CN224933305U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vacuum pump working fluid cooling technology, and in particular to a working fluid cooler for vacuum pumps in air-cooled units. Background Technology
[0002] In air-cooled units, water ring vacuum pumps are the core equipment for maintaining low back pressure in the turbine exhaust system and ensuring efficient operation of the unit. Their performance directly determines the unit's vacuum level and power generation economy. During the operation of the vacuum pump, the working fluid needs to continuously absorb the heat dissipation from its own work and the latent heat of vaporization of the pumped gas. If it is not cooled in time, the temperature rise will cause a series of operational problems. Therefore, the working fluid cooler has become a key supporting device for the vacuum pump system. During cooler operation, the heat exchange tubes are the core carriers for heat exchange between the working fluid and cooling water. Because the cooling water contains impurities such as calcium and magnesium ions, silt, and microorganisms, calcium and magnesium ions easily precipitate and form scale during heat exchange due to temperature changes. Silt and microbial deposits adhere to the walls of the heat exchange tubes with the water flow, gradually forming a dense impurity layer. This impurity layer has a much lower thermal conductivity than the metal tube wall, significantly increasing thermal resistance and hindering heat transfer. Therefore, improvements are needed to address these issues. Utility Model Content
[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a working fluid cooler for vacuum pumps in air-cooled units.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a working fluid cooler for a vacuum pump of an air-cooled unit, comprising a condensation chamber, both ends of which are flanged and connected to a chamber cover, a connecting flange at the middle of the outer end of the chamber cover, a recovery chamber connected to the middle of the bottom surface of the condensation chamber, an opening at the middle of the upper end of one side of the outer wall of the condensation chamber and bolted to an outer arc-shaped cover, a motor housing installed at the middle of the outer end face of the outer arc-shaped cover, handles on both sides of the motor housing, a liquid inlet at the upper end of one end of the outer wall of the condensation chamber, a liquid outlet at the lower end of the other end of the outer wall of the condensation chamber, mounting plates symmetrically arranged at both ends of the inner wall of the condensation chamber, multiple flow tubes evenly arranged between the opposite surfaces of the two mounting plates, and two cleaning connecting plates sliding opposite each other between the two mounting plates on the inner wall of the condensation chamber.
[0005] Preferably, a guide strip is fixed to the inner wall of one side of the condensation chamber, and a guide groove is opened on the opposite surface of the guide strip and the cleaning connecting plate. A guide block is fixed to the outer wall of the cleaning connecting plate and slidably disposed in the guide groove. A tightening rope is fixed to the upper side of the opposite surface of the two cleaning connecting plates, and one end of the two tightening ropes crosses and is fixed to the motor output shaft in the motor box.
[0006] Preferably, the inner wall of the cleaning connecting plate is fixedly connected with multiple rows of connecting blocks located between multiple flow tubes at equal intervals, and the outer wall of the connecting blocks is uniformly fixed with multiple brushes that abut against the outer wall of the flow tubes.
[0007] Preferably, the condensation chamber has a rectangular through groove at the recovery chamber, the inner wall of the rectangular through groove has an arc-shaped opening and closing groove, a bottom plate is slidably provided in the arc-shaped opening and closing groove, and a fixing block is fixedly connected to one side of the outward end face of the bottom plate.
[0008] Preferably, mounting blocks are symmetrically fixed to the outer wall of the condensation chamber at both ends of the rectangular through groove, a T-shaped plastic block is fixed to the opposite surface of one of the two mounting blocks, and a pin hole is opened on the opposite surface of the other mounting block.
[0009] Preferably, the fixing block has two corresponding pins with corresponding pin holes on one end face, the fixing block has an arc-shaped chamfer on the opposite side facing the T-shaped plastic block, the recycling bin has a lifting groove on one end face, a door panel slides up and down in the lifting groove, and a lifting crossbar located on the top surface of the recycling bin is fixed to the top of the door panel.
[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model utilizes the cooperation between the motor in the motor housing and the cleaning connecting disc. The motor output shaft drives two intersecting tightening ropes to exert a traction and contraction effect, pulling the two cleaning connecting discs to slide opposite each other along the inner wall of the condensation chamber. After contraction, manual reset is required, facilitating the movement of the cleaning connecting discs close to the tube wall, thus improving the controllability of the cleaning action and enabling full-length coverage cleaning of the heat exchange tubes. Furthermore, through the cooperation between the connecting block on the inner wall of the cleaning connecting disc and the brush, the connecting block fixes the brush in the gap between the heat exchange tubes. As the brush moves with the cleaning connecting disc, it directly abuts against the heat exchange tube wall, scraping and cleaning the attached scale, mud, and other impurities, improving the thoroughness of impurity cleaning and enabling real-time impurity removal from the heat exchange tube wall. Ultimately, this solves the problem of impurities easily adhering to the heat exchange tube wall during the cooling process, forming a dense impurity layer that hinders heat transfer, thereby improving the thermal conductivity of the heat exchange tube and the overall heat exchange effect of the cooler. Attached Figure Description
[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a first-view schematic diagram of the overall structure proposed in this utility model; Figure 2 This is a partial cross-sectional view of the bin cover structure proposed in this utility model; Figure 3This is a schematic diagram of the overall structure of the flow tube proposed in this utility model; Figure 4 This is a schematic cross-sectional view of the overall structure of the recycling bin proposed in this utility model.
[0012] The numbers in the diagram are: 1. Connecting flange; 2. Condensation chamber; 3. Motor box; 4. Recovery chamber; 5. Mounting plate; 6. Flow pipe; 7. Liquid inlet; 8. Liquid outlet; 9. Cleaning connecting plate; 10. Guide strip; 11. Tightening rope; 12. Connecting block; 13. Base plate; 14. Fixing block. Detailed Implementation
[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0014] Example: See Figures 1 to 4This utility model discloses a working fluid cooler for a vacuum pump in an air-cooled unit, comprising a condensing chamber 2. Both ends of the condensing chamber 2 are flanged and connected to a cover. A connecting flange 1 is located at the center of the outward-facing end of the cover. A recovery chamber 4 is connected to the center of the bottom surface of the condensing chamber 2. An outer arc-shaped cover is bolted to the upper center of one side of the outer wall of the condensing chamber 2. A motor housing 3 is installed at the center of the outward-facing end of the outer arc-shaped cover. Handles are provided on both sides of the motor housing 3. A liquid inlet 7 is located at the upper end of one end of the outer wall of the condensing chamber 2, and a liquid outlet 8 is located at the lower end of the other end of the outer wall of the condensing chamber 2. Mounting plates 5 are symmetrically arranged at both ends of the inner wall of the condensing chamber 2. Multiple flow tubes 6 are evenly arranged between the opposing surfaces of the two mounting plates 5. Two cleaning connecting plates 9 are slidably arranged between the two mounting plates 5 on the inner wall of the condensing chamber 2. The motor inside the motor housing 3 is a Y100L-2 three-phase asynchronous motor with stable speed, providing reliable power for the movement of the cleaning connection plate 9. The condensation chamber 2 is made of Q235B carbon steel with uniform wall thickness, high temperature and corrosion resistance, capable of withstanding pressure and temperature under cooling conditions. The flow pipe 6 is made of 316L stainless steel, with high thermal conductivity, strong resistance to scale adhesion, and extended service life. The cleaning connection plate 9 is made of PVC-U rigid polyvinyl chloride, lightweight, chemically resistant, and easy to slide. Through the cooperation of the condensation chamber 2, connecting flange 1, recovery chamber 4, motor housing 3, inlet 7, outlet 8, mounting plate 5, flow pipe 6, and cleaning connection plate 9, the installation foundation for the working fluid and coolant containment, flow, and impurity cleaning structure is achieved. (Connecting flange...) 1. Ensure stable connection between the equipment and the vacuum pump system. Flow tube 6 provides an efficient heat exchange channel, and cleaning connection plate 9 provides structural support for subsequent impurity removal. The above components together form the basic framework of the device, laying the structural foundation for the working fluid cooling and impurity removal functions. A guide strip 10 is fixed to the inner wall of one side of the condensation chamber 2. Guide grooves are opened on the opposite surface of the guide strip 10 and the cleaning connection plate 9. A guide block that slides in the guide groove is fixed to the outer wall of the cleaning connection plate 9. A tightening rope 11 is fixed to the upper side of the opposite surface of the two cleaning connection plates 9 respectively. One end of the two tightening ropes 11 crosses and is fixed to the motor output shaft in the motor box 3. The guide strip 10 is made of 45# steel, which has high hardness and can provide stable guidance for the cleaning connection plate 9. The tightening rope 11 is made of steel wire rope, which has high tensile strength and good wear resistance, ensuring traction force. The cooperation between the guide strip 10 and the guide block ensures that the cleaning connecting disc 9 slides along a fixed trajectory, avoiding deviation that could cause the brush to detach from the flow tube 6. The connection between the tightening rope 11 and the motor output shaft enables the transmission of motor power to the cleaning connecting disc 9, driving it to move in the opposite direction to complete the impurity removal action. This improves the accuracy of the movement of the cleaning connecting disc 9 and the reliability of power transmission, ensuring the effectiveness of subsequent impurity removal. Multiple rows of connecting blocks 12 are fixedly fixed at equal intervals on the inner wall of the cleaning connecting disc 9, located between the gaps of multiple flow tubes 6. Multiple brushes that abut against the outer wall of the flow tube 6 are evenly fixed to the outer wall of the connecting blocks 12. The connecting blocks 12 are made of ABS engineering plastic, which has high strength and good toughness, and can stably fix the brushes.The brush uses PA612 nylon bristles with moderate hardness, effectively scraping away scale without damaging the outer wall of the flow tube 6. The connecting block 12 precisely fixes the brush within the gaps of the flow tube 6, ensuring a tight fit between the brush and the outer wall of the flow tube 6. As the brush moves with the cleaning connecting plate 9, it thoroughly scrapes away impurities adhering to the wall of the flow tube 6, completely removing scale and sediment, reducing thermal resistance, restoring the thermal conductivity of the flow tube 6, and thus improving the overall heat exchange effect of the cooler.
[0015] In this utility model, the condensation chamber 2 has a rectangular through-slot located at the recovery chamber 4. An arc-shaped opening and closing groove is formed on the inner wall of the rectangular through-slot. A base plate 13 slides within the arc-shaped opening and closing groove, and a fixing block 14 is fixedly connected to one side of the outward-facing end face of the base plate 13. The base plate 13 is made of 304 stainless steel, which is corrosion-resistant, high-strength, and can withstand the weight of accumulated impurities. The fixing block 14 is made of HT200 gray cast iron, which has high hardness, is easy to manually push, and is not easily deformed. The cooperation between the rectangular through-slot and the base plate 13 realizes the opening and closing control of the recovery chamber 4. During normal operation, the base plate 13 is closed to prevent fluid leakage, and it is opened during cleaning to facilitate the discharge of impurities. The fixing block 14 is... The sliding mechanism of the base plate 13 provides a convenient operating end, improving the ease of opening and closing the base plate 13 and providing a reliable structural guarantee for the centralized recovery of impurities. The outer wall of the condensation chamber 2 is symmetrically fixed with mounting blocks at both ends of the rectangular through-slot. A T-shaped plastic block is fixed to the opposite surface of one of the mounting blocks, and a pin hole is opened on the opposite surface of the other mounting block. The mounting blocks are made of Q235A carbon steel, which has good welding performance and can be stably fixed to the outer wall of the condensation chamber 2. The T-shaped plastic block is made of POM (polyoxymethylene), which has high hardness and good wear resistance, assisting in the positioning of the fixing block 14. The mounting blocks provide a secure connection between the T-shaped plastic block and the pin hole. The base plate 13 is precisely reset by the T-shaped plastic block and the fixing block 14. The pin holes provide positions for the pins to fix it, ensuring that the base plate 13 is stable and does not loosen after closing. This prevents impurities from leaking or fluid from seeping out due to displacement of the base plate 13 during cooling, thus improving the sealing of the recovery chamber 4. One end of the fixing block 14 has two pins with corresponding pin hole slots. The opposite side of the fixing block 14 facing the T-shaped plastic block has an arc-shaped chamfer. One end of the recovery chamber 4 has a lifting groove, in which a door panel slides up and down. The top of the door panel is fixed with a lifting crossbar located on the top surface of the recovery chamber 4. The pins are made of 45# steel with a surface plated. The zinc treatment provides excellent rust resistance and ensures secure fixation. The door panel is made of PC polycarbonate, offering good transparency for easy observation of impurity accumulation within the recycling bin 4. The lifting crossbar is made of 304 stainless steel, providing high strength and facilitating manual lifting of the door panel. The combination of the pin and the pin hole allows for quick and reliable fixation of the base plate 13. The rounded chamfer of the fixing block 14 prevents collisions and jamming with the T-shaped plastic block, ensuring smooth repositioning of the base plate 13. The combination of the door panel and the lifting crossbar allows staff to easily observe the impurities within the recycling bin 4, promptly determine the timing of cleaning, reduce unnecessary disassembly and inspection, and improve the convenience of equipment maintenance.
[0016] Working Principle: In use of this invention, firstly, the cooler is connected to the vacuum pump system via the connecting flange 1 of the chamber cover. The working fluid enters the interior of the chamber cover through the connecting flange 1, and then flows into the multiple flow pipes 6 inside the condensing chamber 2, completing the delivery of the working fluid. Meanwhile, the coolant enters the cavity of the condensing chamber 2 from the inlet 7 at one end of the outer wall of the condensing chamber 2, flowing around the outside of the flow pipes 6. At this time, the working fluid is inside the flow pipes 6, and the coolant is outside the flow pipes 6. The two exchange heat through the pipe walls, achieving cooling of the working fluid. The cooled coolant, after heat exchange, flows out from the outlet 8 at the other end of the outer wall of the condensing chamber 2, while the cooled working fluid flows out from the other end of the flow pipes 6, re-enters the vacuum pump via the connecting flange 1 for reuse. During this process, the coolant... The bottom plate 13 of the recovery chamber 4 is in a closed state, fixed by the pin of the fixing block 14 engaging with the pin hole of the mounting block of the condensation chamber 2, preventing external impurities from entering or internal fluid from leaking. The door of the recovery chamber 4 is also kept closed, only opened when it is necessary to inspect the interior of the recovery chamber 4, and only the internal space of the recovery chamber 4 can be observed after opening, and the accumulation of impurities in the condensation chamber 2 cannot be directly viewed. When the cooler needs to be cleaned after running for a period of time, first close the input valves of the coolant and working fluid, open the outlet 8 on the outer wall of the condensation chamber 2, and completely drain the residual coolant in the cavity of the condensation chamber 2 to avoid fluid interference with impurity collection during the cleaning process. After the coolant is drained, pull up the lifting bar of the door of the recovery chamber 4 to open the door, and then pull out the fixing block 14. The pin on the fixed block 14 pushes the fixed block 14 to move the bottom plate 13 along the arc-shaped opening and closing groove of the rectangular through groove, opening the bottom of the recovery chamber 4 and providing a channel for subsequent impurities to fall. After the above preparations are completed, the motor in the motor box 3 is started. The motor output shaft rotates and drives the two cross-connected tightening ropes 11 to pull and retract. The tightening ropes 11 pull the two cleaning connecting discs 9 to slide opposite each other along the inner wall of the condensation chamber 2. The brush on the connecting block 12 on the inner wall of the cleaning connecting disc 9 moves with the cleaning connecting disc 9, closely abutting against the pipe wall of the flow pipe 6 and scraping and cleaning the attached scale, mud and other impurities, completely removing the impurities from the pipe wall. Under the action of gravity, the removed impurities fall directly into the recovery chamber 4 through the connecting area between the condensation chamber 2 and the recovery chamber 4, and then through the opening... The base plate 13 is discharged outside the cooler, enabling real-time cleaning and discharge of impurities. After the impurities are cleaned and the rope 11 is tightened to its limit position, the motor is turned off, the bolts connecting the outer arc-shaped cover and the condenser chamber 2 are removed, the outer arc-shaped cover is opened, and the cleaning connecting plate 9 is directly contacted and pulled through the opening of the outer arc-shaped cover to complete the manual reset of the cleaning connecting plate 9. If there are stubborn impurities remaining, a cleaning tool can be inserted through the opening of the outer arc-shaped cover to assist in cleaning, ensuring that the pipe wall of the flow pipe 6 is clean. Finally, the base plate 13 of the recovery chamber 4 is closed in sequence, that is, the fixing block 14 is reset and the pin is inserted for fixation, the door panel of the recovery chamber 4 is closed, the outer arc-shaped cover is re-fastened to the opening of the condenser chamber 2 and the bolts are tightened, and the outlet valve 8 is opened to restore the flow of coolant. At this point, the use of the device is completed.
[0017] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A working fluid cooler for a vacuum pump in an air-cooled unit, comprising a condensation chamber (2), characterized in that: The condensing chamber (2) has flanges connecting to the cover at both ends. A connecting flange (1) is provided at the middle of the outer end of the cover. A recovery chamber (4) is connected to the middle of the bottom surface of the condensing chamber (2). The upper middle of one side of the outer wall of the condensing chamber (2) is open and bolted to an outer arc-shaped cover. A motor box (3) is installed at the middle of the outer end face of the outer arc-shaped cover. Handles are provided on both sides of the motor box (3). A liquid inlet (7) is provided at the upper end of one end of the outer wall of the condensing chamber (2). A liquid outlet (8) is provided at the lower end of the other end of the outer wall of the condensing chamber (2). Mounting plates (5) are symmetrically provided at both ends of the inner wall of the condensing chamber (2). Multiple flow pipes (6) are evenly provided between the opposite surfaces of the two mounting plates (5). Two cleaning connecting plates (9) are slidably provided between the two mounting plates (5) on the inner wall of the condensing chamber (2).
2. A working fluid cooler for a vacuum pump in an air-cooled unit according to claim 1, characterized in that: A guide strip (10) is fixed to one side of the inner wall of the condensation chamber (2). A guide groove is opened on the opposite surface of the guide strip (10) and the cleaning connection plate (9). A guide block is fixed to the outer wall of the cleaning connection plate (9) and is slidably disposed in the guide groove. A tightening rope (11) is fixed to one side of the upper end of the opposite surface of the two cleaning connection plates (9). One end of the two tightening ropes (11) crosses and is fixed to the motor output shaft in the motor box (3).
3. A working fluid cooler for a vacuum pump in an air-cooled unit according to claim 2, characterized in that: The inner wall of the cleaning connecting plate (9) is equidistantly fixed with multiple rows of connecting blocks (12) located between multiple flow tubes (6), and the outer wall of the connecting blocks (12) is uniformly fixed with multiple brushes that abut against the outer wall of the flow tubes (6).
4. A working fluid cooler for a vacuum pump in an air-cooled unit according to claim 1, characterized in that: The condensation chamber (2) has a rectangular through groove at the recovery chamber (4). The inner wall of the rectangular through groove has an arc-shaped opening and closing groove. A bottom plate (13) is slidably provided in the arc-shaped opening and closing groove. A fixing block (14) is fixedly connected to one side of the outward end face of the bottom plate (13).
5. A working fluid cooler for a vacuum pump in an air-cooled unit according to claim 4, characterized in that: The outer wall of the condensation chamber (2) is symmetrically fixed with mounting blocks at both ends of the rectangular through groove. A T-shaped plastic block is fixed to the opposite surface of one of the two mounting blocks, and a pin hole is opened on the opposite surface of the other mounting block.
6. A working fluid cooler for a vacuum pump in an air-cooled unit according to claim 4, characterized in that: The fixing block (14) has two corresponding pins with corresponding pin holes on one end face. The fixing block (14) has an arc-shaped chamfer on the opposite side facing the T-shaped plastic block. The recycling bin (4) has a lifting groove on one end face. A door panel slides up and down in the lifting groove. A lifting crossbar located on the top surface of the recycling bin (4) is fixed to the top of the door panel.