Horizontal centrifugal pump seal cooling water recycling device

Abstract

The utility model relates to centrifugal pump machine seal cooling field especially relates to a horizontal centrifugal pump machine seal cooling water recycling device, including centrifugal pump and water pump a, and the water pipe a is connected between centrifugal pump and water pump a, and the water pipe a one end connects centrifugal pump machine seal export, and the other end is connected with water pump a water inlet, and the water outlet of water pump a is connected with water pipe b, and the other end of water pipe b is connected with pvc water tank, and the bottom of pvc water tank is connected with water pipe c, and the other end of water pipe c is connected with water pump b and water pipe c is connected with the water inlet of water pump b, and the water outlet of water pump b is connected with water pipe d, and the other end of water pipe d is connected with centrifugal pump machine seal import, and the bottom end of pvc water tank is installed with the air blower, and the device recycles machine seal cooling water through closed type to save water and reduce the cost, and the water tank filter screen guarantees water quality and reduces equipment wear and tear, and the air blower and automatic monitoring water supply design stabilize cooling state, and the top screw thread cover also facilitates cleaning, and all -round guarantee efficient operation.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump mechanical seal cooling technology, specifically a horizontal centrifugal pump mechanical seal cooling water recycling device. Background Technology

[0002] In numerous industrial sectors such as petrochemicals, water treatment, and power energy, horizontal centrifugal pumps are widely used as core fluid transport equipment due to their compact structure, stable operation, and convenient flow adjustment, enabling them to handle long-distance transport and circulation of various media. Among these components, the mechanical seal, as a key part of the horizontal centrifugal pump for achieving dynamic and static sealing, directly determines the pump's sealing performance and overall service life. During high-speed rotation, continuous friction occurs between the dynamic and static rings of the mechanical seal. If effective cooling is not provided in time, the heat generated by this friction will cause a sharp rise in the temperature of the seal surface. This not only accelerates the wear and aging of the seal, leading to safety hazards such as media leakage, but may also cause the mechanical seal to burn out, resulting in equipment downtime and significant economic losses for the company.

[0003] Currently, the mechanical seals of existing horizontal centrifugal pumps generate heat during operation, requiring a continuous flow of cooling water for cooling. In traditional solutions, the cooling water is typically discharged directly or connected to an open-loop system, which presents the following problems: 1. Water waste: The cooling water consumption of a single pump can reach several tons per hour, resulting in high long-term operating costs; 2. Water pollution risk: Open-loop systems are prone to introducing impurities, leading to wear of the mechanical seal or decreased cooling efficiency; 3. Lack of heat recovery: Direct discharge of high-temperature cooling water results in heat waste. Summary of the Invention

[0004] The main purpose of this utility model is to solve the above-mentioned existing technical problems and provide a horizontal centrifugal pump mechanical seal cooling water recycling device.

[0005] The specific solution of this utility model is as follows: a horizontal centrifugal pump mechanical seal cooling water recycling device, including a centrifugal pump and a water pump a, a water pipe a connecting the centrifugal pump and the water pump a, one end of the water pipe a connecting to the outlet of the centrifugal pump mechanical seal, and the other end connecting to the inlet of the water pump a, a water pipe b connecting to the outlet of the water pump a, a PVC water tank connecting to the other end of the water pipe b, a water pipe c connecting to the bottom of the PVC water tank, a water pipe c connecting to the other end of the water pipe c and connecting to the inlet of the water pump b, a water pipe d connecting to the outlet of the water pump b, and a blower installed at the bottom of the PVC water tank.

[0006] According to the above technical solution, the cooling water discharged by the centrifugal pump mechanical seal is recycled to the PVC water tank, cooled by the blower, and then sent back to the mechanical seal for recycling. This not only saves water resources but also maintains a suitable cooling water temperature, ensuring the performance of the mechanical seal and the stable operation of the centrifugal pump.

[0007] Furthermore, the PVC water tank has a fixing ring along the inner wall, and a filter screen is installed on the top of the fixing ring. The end of the water pipe c away from the water pump b is connected to the bottom side of the PVC water tank and is located below the filter screen.

[0008] According to the above technical solution, the filter screen installed by the fixed ring can filter the recovered cooling water and intercept impurities. The water pipe C is connected to the bottom of the PVC water tank below the filter screen, which can ensure that the filtered clean cooling water enters the subsequent circulation, avoid impurities from damaging the water pump B and the centrifugal pump mechanical seal, and ensure the stable operation of the device.

[0009] Furthermore, a cover is threaded onto the top of the PVC water tank.

[0010] According to the above technical solution, the impurities filtered out by the internal filter can be cleaned by unscrewing the cover.

[0011] Furthermore, the PVC water tank is equipped with a temperature sensor, a level gauge, and a PLC controller. A water supply valve is installed on the surface of the PVC water tank, and the temperature sensor, level gauge, and water supply valve are all electrically connected to the PLC controller.

[0012] According to the above technical solution, the water temperature and water volume can be monitored in real time by temperature sensors and level gauges on the PVC water tank. After the data is transmitted to the PLC controller, the water supply valve can be automatically controlled to start and stop, realize abnormal water temperature warning and automatic water replenishment when water is short, and ensure the stable operation of the cooling water circulation system.

[0013] Compared with the prior art, this utility model has the following advantages: The horizontal centrifugal pump mechanical seal cooling water recycling device can recycle and reuse the cooling water discharged from the centrifugal pump mechanical seal by constructing a closed circulation system, which greatly saves water resources and reduces operating costs; The filter screen in the PVC water tank can intercept impurities, and the specific connection method ensures the cleanliness of the circulating water, reduces wear on the centrifugal pump mechanical seal and water pump, and extends the service life of the equipment; The heat dissipation effect of the blower and the linkage design of temperature, liquid level monitoring and automatic water replenishment can stably control the cooling state, avoid problems of excessive water temperature or insufficient water volume, and improve the reliability of equipment operation; At the same time, the threaded cover on the top of the PVC water tank makes it easy for staff to clean impurities, reduces the difficulty of daily maintenance, and comprehensively ensures the efficient and stable operation of the device. Attached Figure Description

[0014] Figure 1 This is a plan view of the present invention;

[0015] Figure 2 This is a front sectional view of the PVC water tank structure of this utility model;

[0016] Figure 3 This is a flowchart of the water supply valve of this utility model;

[0017] In the diagram: 1. Centrifugal pump; 2. Water pump a; 3. Water pipe a; 4. Water pipe b; 5. PVC water tank; 6. Water pipe c; 7. Water pump b; 8. Water pipe d; 9. Blower; 10. Fixing ring; 11. Filter screen; 12. Cover; 13. Temperature sensor; 14. Level gauge; 15. PLC controller; 16. Water supply valve. Detailed Implementation

[0018] See Figure 1-3 This embodiment is a horizontal centrifugal pump mechanical seal cooling water recycling device, including a centrifugal pump 1 and a water pump a2. A water pipe a3 connects the centrifugal pump 1 and the water pump a2. One end of the water pipe a3 is connected to the mechanical seal outlet of the centrifugal pump 1, and the other end is connected to the water inlet of the water pump a2, so that the water pump a2 can draw out the cooling water in the centrifugal pump 1. A water pipe b4 is connected to the water outlet of the water pump a2. The other end of the water pipe b4 is connected to a PVC water tank 5. The PVC water tank 5 stores cooling water in advance. A water pipe c6 is connected to the bottom of the PVC water tank 5. The other end of the water pipe c6 is connected to a water pump b7, and the water pipe c6 is connected to the inlet of the water pump b7, so that the water pump b7 can draw out the cooling water in the PVC water tank 5 again. The outlet of the water pump b7 is connected to a water pipe d8, and the other end of the water pipe d8 is connected to the mechanical seal inlet of the centrifugal pump 1, so that the cooling water can be discharged back into the centrifugal pump 1 for circulation cooling. A blower 9 is installed at the bottom of the PVC water tank 5, which can temporarily cool the cooling water inside the PVC water tank 5.

[0019] Furthermore, a fixing ring 10 is provided along the inner wall of the PVC water tank 5. A filter screen 11 is installed on the top of the fixing ring 10 by bolts. The end of the water pipe c6 away from the water pump b7 is connected to the bottom side of the PVC water tank 5 and is located below the filter screen 11, so that the water drawn out by the water pipe c6 is filtered by the filter screen 11.

[0020] Furthermore, the PVC water tank 5 is threadedly fitted with a cover 12 on the top, which can be removed to clean impurities from the filter screen 11.

[0021] Furthermore, the PVC water tank 5 is equipped with a temperature sensor 13, a level gauge 14, and a PLC controller 15. A water replenishment valve 16 is installed on the surface of the PVC water tank 5. The temperature sensor 13, the level gauge 14, and the water replenishment valve 16 are all electrically connected to the PLC controller 15. When the PVC water tank 5 detects that the internal cooling water temperature exceeds 60 degrees, it can automatically replace the water through the water replenishment valve 16. Water can also be replenished when the internal water level is too low due to evaporation.

[0022] The working principle of this embodiment is as follows: When the horizontal centrifugal pump mechanical seal cooling water recycling device is working, the water pump a2 first draws out the cooling water discharged from the mechanical seal outlet of the centrifugal pump 1 through the water pipe a3, and then transports it through the water pipe b4 to the PVC water tank 5 which has been pre-stored with cooling water; the cooling water entering the PVC water tank 5 first passes through the filter screen 11 at the top of the inner wall fixing ring 10 to filter impurities, and at the same time, the blower 9 at the bottom of the PVC water tank 5 aerates and cools the cooling water; then the water pump b7 passes through the water pipe c6 connected to the bottom of the filter screen 11 of the PVC water tank 5 to remove the filtered water. After cooling, the water is extracted and then transported back to the mechanical seal inlet of centrifugal pump 1 via water pipe d8 to complete one cooling cycle. During the process, the temperature sensor 13 and level gauge 14 on the PVC water tank 5 monitor the water temperature and water volume in real time and transmit the data to the PLC controller 15. If the water temperature exceeds 60 degrees, the PLC controller 15 controls the water replenishment valve 16 to automatically change the water. If the water level is too low due to evaporation, water is also automatically replenished through the water replenishment valve 16 to ensure that the cycle continues to be stable. The threaded cover 12 on the top of the PVC water tank 5 can also be unscrewed periodically to clean the impurities on the filter screen 11.

Claims

1. A device for recycling cooling water from the mechanical seal of a horizontal centrifugal pump, characterized in that: The system includes a centrifugal pump and a water pump a. A water pipe a connects the centrifugal pump and the water pump a. One end of the water pipe a is connected to the mechanical seal outlet of the centrifugal pump, and the other end is connected to the water inlet of the water pump a. A water pipe b is connected to the outlet of the water pump a. The other end of the water pipe b is connected to a PVC water tank. A water pipe c is connected to the bottom of the PVC water tank. The other end of the water pipe c is connected to the water pump b, and the water pipe c is connected to the water inlet of the water pump b. A water pipe d is connected to the outlet of the water pump b. The other end of the water pipe d is connected to the mechanical seal inlet of the centrifugal pump. A blower is installed at the bottom of the PVC water tank.

2. The horizontal centrifugal pump mechanical seal cooling water reuse device according to claim 1, characterized in that: The PVC water tank has a fixing ring along the inner wall, and a filter screen is installed on the top of the fixing ring. The end of the water pipe c away from the water pump b is connected to the bottom side of the PVC water tank and is located below the filter screen.

3. The horizontal centrifugal pump mechanical seal cooling water reuse device according to claim 1, characterized in that: The PVC water tank is threaded with a cover on top.

4. The horizontal centrifugal pump mechanical seal cooling water reuse device according to claim 1, characterized in that: The PVC water tank is equipped with a temperature sensor, a level gauge, and a PLC controller. A water supply valve is installed on the surface of the PVC water tank. The temperature sensor, level gauge, and water supply valve are all electrically connected to the PLC controller.

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