Device for monitoring water flow and water quality of high-power main motor cooler

Abstract

The utility model discloses a kind of device for monitoring high-power main motor cooler water flow and water quality, belong to cooler monitoring technical field.The device includes water flow indicator and temperature control device;The water flow indicator is set on the inlet pipeline of outer circulating water and cooler, including pipeline and impeller, and observation hole is equipped in the top middle part of pipeline, and impeller is fixedly installed in observation hole;The temperature control device is set in the air inlet and air outlet of main motor cooler.The utility model is convenient for detecting the condition of water flow in pipeline, and it is convenient for daily spot inspection and timely maintenance of equipment;Low-cost design is adopted, and a large amount of equipment cost will be saved for using unit if popularized and used, in line with the principle of reducing cost and increasing efficiency, with greater popularization value.

Description

Technical Field

[0001] This utility model relates to a device for monitoring the water flow and water quality of a high-power main motor cooler, belonging to the field of cooler monitoring technology. Background Technology

[0002] The main motor water cooling system of a continuous rolling mill is primarily used to ensure the stable operation of the main motor during high-temperature, high-load, and continuous rolling operations. The internal medium of the main motor cooler is water, and its core functions include: ① High-efficiency heat dissipation and cooling: Circulating cooling water directly removes the large amount of heat generated inside the motor (especially the stator windings) due to electromagnetic losses (copper losses, iron losses) and mechanical friction during operation, ensuring the motor temperature is controlled within a safe range and preventing overheating damage. This is its most basic and crucial function. ② Maintaining operating efficiency: A stable low-temperature environment reduces the resistance loss of the motor windings, ensuring constant motor output power and maintaining mill production efficiency and product quality. ③ Extending equipment lifespan: Effective temperature rise control significantly slows down the aging rate of motor insulation materials and reduces wear on mechanical parts caused by thermal expansion, thereby greatly extending the service life of the main motor. ④ Enhancing environmental adaptability: The closed-loop circulation design isolates dust and corrosive gases (such as acid mist), reducing internal scale buildup, making it particularly suitable for the harsh working conditions of high-temperature, dusty environments in steel rolling mills. Compared to air-cooled motors, water cooling is unaffected by ambient temperature, resulting in more stable and reliable heat dissipation. ⑤ Reduced operating noise: Because no high-speed fan is needed for cooling, the overall operating noise of a water-cooled motor is significantly lower than that of an air-cooled motor of the same power, meeting the noise reduction requirements of steel rolling mills. ⑥ Improved energy efficiency and environmental friendliness: Eliminating the fan system reduces mechanical losses and improves the motor's efficiency; it also avoids airflow noise pollution generated by fans.

[0003] This water-cooling system relies on high-precision shut-off valves, coolers, filters, temperature sensors, and external circulating water working together to ensure that the cooling water flow and purity meet standards and prevent malfunctions caused by scaling or corrosion in the pipes. Therefore, routine maintenance should focus on water flow and water quality management.

[0004] The existing external circulating water pipeline before entering the cooler serves to filter the external circulating water. Normally, water enters the cooler through a pipe equipped with a Y-type filter. If the Y-type filter screen becomes clogged, the water flow into the cooler decreases. In this case, to ensure cooling efficiency, the bypass valve needs to be opened to maintain water flow. However, based on long-term operational experience, this method only ensures water is present in the pipeline, but cannot guarantee the quality of the water flow or water quality. Furthermore, the main motor cooling water inlet pipeline is equipped with a flow meter and cooling water inlet and outlet temperature measuring devices. This measure has drawbacks: firstly, the flow meter uses a flapper type, which, after long-term use, can become stuck, causing abnormal flow indications and "false signals"; secondly, when the flow rate is insufficient or the air temperature is low, the temperature change is not very obvious, increasing the difficulty of monitoring.

[0005] Therefore, there is an urgent need for a device that can monitor water flow and water quality to prevent equipment accidents. Utility Model Content

[0006] To address the issues of monitoring water flow rate and water quality, this invention provides a device for monitoring the water flow rate and water quality of a high-power main motor cooler.

[0007] The current problems mainly focus on the unstable flow rate of the cooling medium inside the cooler, resulting in insufficient cooling capacity and high temperature rise of the main motor. To solve this problem, we need to analyze the water supply structure of the main motor cooler, which involves two aspects: First, for the pipes entering the main motor cooler, to ensure water flows into the cooler, a device with a water flow indicator needs to be added at the valve outlet to facilitate observation of the water status in the pipes; Second, temperature measuring points should be added to the air inlet and outlet of the main motor cooler to determine whether the flow rate of the external circulating cooling water to the main motor is abnormal by measuring the temperature rise.

[0008] The technical solution adopted in this utility model is: A device for monitoring the water flow and water quality of a high-power main motor cooler includes a water flow indicator and a temperature control device. The water flow indicator is installed on the inlet pipe of the external circulating water and the cooler, and includes a pipe and an impeller. An observation hole is provided in the middle of the top of the pipe, and the impeller is fixedly installed in the observation hole. The temperature control device is installed at the air inlet and air outlet of the main motor cooler.

[0009] The observation hole is sealed with tempered glass. The water flow indicator provided by this utility model can determine the water flow rate through the impeller and also show the degree of water turbidity through the observation hole.

[0010] The water flow indicator is made of stainless steel with a diameter of DN100; the inlet and outlet of the pipe are connected by flanges.

[0011] The impeller has a diameter of 25mm, 20 teeth, and a fixing rod passes through its shaft, which is then fixed inside the pipe by screws.

[0012] The temperature control device is model PT100.

[0013] This utility model provides a device for monitoring the water flow and water quality of a high-power main motor cooler, which brings the following benefits: (1) It facilitates the detection of water flow in the pipeline, and facilitates daily inspections and timely maintenance of equipment; (2) The low-cost design, if promoted and used, will save users a lot of equipment costs, which is in line with the principle of cost reduction and efficiency improvement and has great promotion value.

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external circulating water entering the cooler pipe of this utility model; Figure 2 This is a schematic diagram of the structure of a water flow indicator. Figure 3 This is a schematic diagram of the structure of a high-power main motor cooler.

[0016] In the diagram: 1-First shut-off valve; 2-Y-type filter; 3-Second shut-off valve; 4-Third shut-off valve; 5-Inlet; 6-Outlet; 7-Bypass pipeline; 8-Water flow indicator; 9-Impeller; 10-Observation hole; 11-Flange; 12-Water cooling device; 13-Main motor body (including rotor and stator); 14-Temperature control position. Detailed Implementation

[0017] Example

[0018] like Figures 1-3 As shown, a device for monitoring the water flow and water quality of a high-power main motor cooler includes a water flow indicator and a temperature control device. The water flow indicator is installed on the inlet pipe of the external circulating water and the cooler, and includes a pipe and an impeller. An observation hole is provided in the middle of the top of the pipe, and the impeller is fixedly installed in the observation hole. The temperature control device is installed at the air inlet and air outlet of the main motor cooler.

[0019] like Figure 1As shown, a water flow indicator 8 is installed on the inlet pipe of the external circulating water and the cooler. The external circulating water enters the cooler through the pipe of the Y-type filter 2. If the filter screen of the Y-type filter 2 becomes clogged, the water flow into the cooler will decrease. In this case, in order to ensure the cooling effect, the shut-off valve of the bypass pipe 7 needs to be opened to ensure the water flow. In order to monitor the water flow and water quality, this utility model has specially designed a water flow indicator 8. That is, before the external circulating water enters the cooler, it passes through the inlet 5 of the inlet pipe, the Y-type filter 2 or the bypass pipe 7, the outlet 6, and then through the water flow indicator 8. The water flow and water quality are monitored here, and only those that are qualified can enter the cooler.

[0020] Specifically, such as Figure 2 As shown, the water flow indicator is made entirely of stainless steel for corrosion resistance and durability; it has a pipe diameter of DN100; the inlet and outlet use a double flange design; an observation hole is installed directly above the flow meter, fitted with tempered glass with a pressure resistance rating of 10MPa and a thickness of 8mm; the impeller, located at the observation hole, is made of plastic, making it lightweight and easy to rotate. The impeller has a diameter of 25mm, 20 teeth, and a fixing rod passes through its shaft, with tightness adjusted using an M4 hex socket screw.

[0021] Using the flow meter described above, the water quality can be observed through the observation hole, and the water flow rate can be determined by the impeller speed.

[0022] This utility model is specially equipped with a temperature control device, which is installed at the air inlet and air outlet of the cooler. The material is platinum and the model number is PT100.

[0023] Considering special circumstances such as holidays or nighttime when there is no one on site or during inspections, temperature control devices are added to the air inlet and outlet of the main motor cooler to ensure normal cooling effect of the main motor. Figure 3 The installation location of the temperature control device is shown in the figure. The flow rate of the external circulating cooling water of the main motor is judged by the magnitude of the temperature rise.

[0024] T 温升 =T 出口 -T 入口 Based on on-site experience, it is believed that when T 温升 If the temperature is above 15°C and the cooling water flow is insufficient, the equipment maintenance personnel and operators are advised to confirm the on-site water flow.

Claims

1. A device for monitoring the water flow rate and water quality of a high-power main motor cooler, characterized in that: It includes a water flow indicator and a temperature control device; the water flow indicator is installed on the inlet pipe of the external circulating water and the cooler, and includes a pipe and an impeller. An observation hole is provided in the middle of the top of the pipe, and the impeller is fixedly installed in the observation hole; the temperature control device is installed at the air inlet and air outlet of the main motor cooler.

2. The device for monitoring the water flow rate and water quality of a high-power main motor cooler according to claim 1, characterized in that: The water flow indicator is made of stainless steel with a diameter of DN100; the inlet and outlet of the pipe are connected by flanges.

3. The device for monitoring the water flow rate and water quality of a high-power main motor cooler according to claim 1, characterized in that: The observation hole is sealed with tempered glass.

4. The device for monitoring the water flow rate and water quality of a high-power main motor cooler according to claim 1, characterized in that: The impeller has a diameter of 25mm, 20 teeth, and a fixing rod passes through its shaft, which is then fixed inside the pipe by screws.

5. The device for monitoring the water flow rate and water quality of a high-power main motor cooler according to claim 1, characterized in that: The temperature control device is model PT100.

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