Cooling device for hydraulic oil tank of dry slag extractor of thermal power plant

Abstract

The utility model relates to the technical field of hydraulic oil tank cooling, in particular to a hydraulic oil tank cooling device for a dry slag extractor of a thermal power plant. Comprising a cooling water pipe which is bent and arranged in a hydraulic oil tank to be cooled; the water supply pipeline comprises an industrial reuse water pipeline and an industrial water pipeline which are connected in parallel; the first end of the water inlet pipeline is connected with the converging end of the water supply pipeline, and the second end of the water inlet pipeline is connected with the water inlet end of the cooling water pipe; a water inlet flow sensor and a water inlet flow regulating valve are sequentially arranged on the water inlet pipeline in the water flow direction; the first end of the water outlet pipeline is connected with the water outlet end of the cooling water pipe, and the second end is connected with a drainage pipeline; and a water outlet flow regulating valve and a water outlet temperature sensor are sequentially arranged on the water outlet pipeline in the water flow direction. The cooling water flow can be automatically adjusted in real time according to the actual temperature change of the hydraulic oil tank, so that the temperature of an outlet pipeline is stabilized at a set value of 45 DEG C, and stable operation of a hydraulic system is effectively ensured.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic oil tank cooling technology, specifically to a hydraulic oil tank cooling device for a dry slag discharge machine in a thermal power plant. Background Technology

[0002] During the operation of dry ash removal machines in thermal power plants, existing hydraulic oil tank cooling devices typically employ a simple straight-line pipeline layout, with cooling water pipes directly running through the hydraulic oil tank. Cooling is achieved through heat exchange between the cooling water and the hydraulic oil. The cooling water source is generally a single water source, and flow and temperature regulation mainly rely on manual operation, lacking effective automatic control methods. Utility Model Content

[0003] The purpose of this invention is to provide a cooling device for the hydraulic oil tank of a dry slag discharge machine in a thermal power plant. The device supplies water to the cooling water pipes via two alternately switchable water sources: an industrial recycled water pipe and an industrial water pipe. The cooling water pipes are arranged in a bent configuration within the hydraulic oil tank to increase the heat exchange area and achieve efficient cooling. This invention also uses an inlet flow sensor and an outlet temperature sensor to monitor the inlet flow and outlet temperature in real time. The inlet and outlet flow rates are adaptively adjusted using inlet and outlet flow regulating valves, respectively. This allows for efficient cooling while simultaneously controlling the oil temperature of the hydraulic oil tank within a preset safe range through flow regulation, thereby ensuring the safe operation of the hydraulic system.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, this utility model provides a cooling device for the hydraulic oil tank of a dry ash discharge machine in a thermal power plant, comprising:

[0006] Cooling water pipes are bent and arranged inside the hydraulic oil tank to be cooled;

[0007] Water supply pipelines, including industrial reclaimed water pipelines and industrial water pipelines connected in parallel;

[0008] The water inlet pipe has a first end connected to the confluence end of the water supply pipe and a second end connected to the water inlet end of the cooling water pipe; the water inlet pipe is provided with a water inlet flow sensor and a water inlet flow regulating valve in sequence along the water flow direction;

[0009] The water outlet pipe has a first end connected to the outlet end of the cooling water pipe and a second end connected to an external drainage pipe; the water outlet pipe is provided with a water flow regulating valve and a water temperature sensor in sequence along the water flow direction.

[0010] Optionally, the water inlet pipe is also provided with a manual water inlet control valve, which is located between the water inlet flow sensor and the water inlet flow regulating valve.

[0011] Optionally, the water outlet pipe is also equipped with a manual water outlet control valve, which is located between the water outlet flow regulating valve and the water outlet temperature sensor.

[0012] Optionally, both the inlet flow regulating valve and the outlet flow regulating valve are solenoid valves.

[0013] Optionally, it also includes:

[0014] The controller is communicatively connected to the inlet flow sensor, the inlet flow regulating valve, the outlet temperature sensor, and the outlet flow regulating valve.

[0015] The controller is configured to adjust the control current of the inlet flow regulating valve and the outlet flow regulating valve according to the outlet water temperature detected by the outlet water temperature sensor, so as to control the inlet flow and the outlet flow respectively.

[0016] Optionally, the external drainage pipe is connected to an industrial wastewater tank.

[0017] Optionally, the water outlet pipe is also equipped with a manual drain valve for controlling the flow of water, and the manual drain valve is located downstream of the water outlet temperature sensor.

[0018] Optionally, both the industrial recycled water pipeline and the industrial water pipeline are equipped with water control valves for controlling the flow of water.

[0019] Optionally, the cooling water pipe is Z-shaped.

[0020] Optionally, the cooling water pipe is made of stainless steel.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This invention features a curved cooling water pipe arrangement that runs through the hydraulic oil tank. Compared to traditional straight pipe arrangements, this significantly increases the contact area between the cooling water and the hydraulic oil, improving heat exchange efficiency and enabling more efficient cooling of the hydraulic oil in the tank. Furthermore, this invention monitors the inlet water flow and outlet water temperature in real time, allowing for adjustments to the cooling water flow based on actual temperature changes in the hydraulic oil tank. This ensures the outlet water temperature remains stable within a set safety value, effectively preventing overheating or underheating of the hydraulic oil tank and guaranteeing stable operation of the hydraulic system. In addition, this invention incorporates two water sources: recycled industrial water and industrial water, which serve as backups and can be switched between each other. If one water source fails or its quality is substandard, the system can promptly switch to the other, ensuring continuous and stable operation of the cooling device and improving the overall system reliability. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the hydraulic oil tank cooling device for a dry slag discharge machine in a thermal power plant, as shown in Example 1.

[0024] In the diagram: 1. Industrial reclaimed water manual valve; 2. Industrial reclaimed water electric valve; 3. Industrial water manual valve; 4. Industrial water electric valve; 5. Inlet pipe; 6. Inlet flow sensor; 7. Inlet manual control valve; 8. Inlet flow regulating valve; 9. Outlet manual control valve; 10. Outlet flow regulating valve; 11. Outlet temperature sensor; 12. Outlet pipe; 13. Industrial reclaimed water pipe; 14. Industrial water pipe; 15. Hydraulic oil tank; 16. Drainage pipe; 17. Manual drain valve; 18. Cooling water pipe. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In the prior art known to the inventors of this utility model, the traditional straight-line pipe arrangement results in a limited contact area between cooling water and hydraulic oil, leading to low heat exchange efficiency and unsatisfactory cooling effect. Manual adjustment of cooling water flow and temperature cannot be precisely adjusted in real time according to the actual temperature changes in the hydraulic oil tank, easily causing excessively high or low oil temperatures, affecting the performance and reliability of the hydraulic system. Furthermore, cooling water pipes made of ordinary carbon steel are prone to scaling and corrosion, requiring regular shutdowns for cleaning and replacement, increasing maintenance costs and downtime. In addition, reliance on a single water source means that if the single water source fails or its water quality is substandard, it cannot be switched to a backup water source in a timely manner, potentially causing the cooling device to malfunction and affecting the stable operation of the dry slag discharger.

[0027] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example 1

[0028] To make the purpose, technical solution and advantages of this utility model patent clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] Combination Figure 1 This embodiment provides a cooling device for the hydraulic oil tank of a dry ash removal machine in a thermal power plant, which includes a cooling water pipe 18, a water supply pipe, an inlet pipe 5, and an outlet pipe 12. The cooling water pipe 18 is bent and arranged inside the hydraulic oil tank 15 to be cooled. The water supply pipe includes an industrial recycled water pipe 13 and an industrial water pipe 14 connected in parallel. The first end of the inlet pipe 5 is connected to the confluence end of the water supply pipe, and the second end is connected to the inlet end of the cooling water pipe 18. An inlet flow sensor 6 and an inlet flow regulating valve 8 are sequentially arranged along the water flow direction on the inlet pipe 5. The first end of the outlet pipe 12 is connected to the outlet end of the cooling water pipe 18, and the second end is connected to a drain pipe 16. An outlet flow regulating valve 10 and an outlet temperature sensor 11 are sequentially arranged along the water flow direction on the outlet pipe 12.

[0030] During operation, industrial recycled water pipeline 13 and industrial water pipeline 14 provide water sources for the water supply pipeline. In this embodiment, two water sources are used: industrial recycled water pipeline 13 and industrial water pipeline 14 from the power plant, serving as backups for each other. Both industrial recycled water pipeline 13 and industrial water pipeline 14 are equipped with water control valves to control the flow of water. The water control valves on industrial recycled water pipeline 13 include a manual industrial recycled water valve 1 and an electric industrial recycled water valve 2 arranged sequentially along the water flow direction; the water control valves on industrial water pipeline 14 include a manual industrial water valve 3 and an electric industrial water valve 4 arranged sequentially along the water flow direction. By controlling the water control valves, the two water sources (industrial recycled water pipeline 13 and industrial water pipeline 14) can be switched between each other. If one water source fails or its water quality is substandard, the system can promptly switch to the other water source, thereby ensuring the continuous and stable operation of the cooling device and improving the overall reliability of the cooling system.

[0031] The confluence of industrial recycled water pipe 13 and industrial water pipe 14 is connected to the first end of inlet pipe 5. The second end of inlet pipe 5 is connected to cooling water pipe 18 to input cooling water. Cooling water pipe 18 is bent and arranged inside hydraulic oil tank 15 to be cooled. In a specific embodiment, cooling water pipe 18 is arranged in a Z-shape (five reciprocating bends in this embodiment) and runs through hydraulic oil tank 15. Compared with the traditional straight pipe arrangement, this greatly increases the contact area between cooling water and hydraulic oil, effectively improving heat exchange efficiency, thereby enabling more efficient cooling of hydraulic oil in hydraulic oil tank 15. The outlet end of cooling water pipe 18 is connected to the first end of outlet pipe 12 to discharge used recycled water to external drainage pipe 16 through outlet pipe 12. In this embodiment, external drainage pipe 16 is connected to the industrial wastewater pool of the power plant. The outlet pipe 12 is also equipped with a manual drain valve 17 for controlling the opening and closing of the drainage water path. The manual drain valve 17 is located downstream of the outlet water temperature sensor 11.

[0032] Furthermore, in this embodiment, the inlet water flow sensor 6 and the outlet water temperature sensor 11 monitor the inlet water flow and outlet water temperature in real time. Based on the monitored inlet water flow and outlet water temperature, the inlet water flow regulating valve 8 and the outlet water flow regulating valve 10 can be controlled in real time to ensure the cooling effect. The inlet water flow sensor 6, the inlet water flow regulating valve 8, the outlet water temperature sensor 11, and the outlet water flow regulating valve 10 are all communicatively connected to a controller. The controller is configured to adjust the control current of the inlet water flow regulating valve 8 and the outlet water flow regulating valve 10 according to the outlet water temperature detected by the outlet water temperature sensor 11 to control the inlet water flow and the outlet water flow respectively. In a specific embodiment, both the inlet water flow regulating valve 8 and the outlet water flow regulating valve 10 are solenoid valves, and the flow rate can be adjusted by adjusting the control current of the inlet water flow regulating valve 8 and the outlet water flow regulating valve 10.

[0033] Specifically, this embodiment uses the interlocking control logic of the inlet water flow sensor 6, the outlet water temperature sensor 11, the inlet water flow regulating valve 8, and the outlet water flow regulating valve 10 to automatically adjust the cooling water flow in real time according to the actual temperature change of the hydraulic oil tank 15, so that the outlet pipe temperature is stabilized at the set value (e.g., 45°C), effectively preventing the hydraulic oil tank 15 from overheating or becoming too cold, and ensuring the stable operation of the hydraulic system.

[0034] In another specific embodiment, the inlet pipe 5 is further provided with an inlet manual control valve 7, which is located between the inlet flow sensor 6 and the inlet flow regulating valve 8. The outlet pipe 12 is further provided with an outlet manual control valve 9, which is located between the outlet flow regulating valve 10 and the outlet temperature sensor 11. The inlet manual control valve 7 and the outlet manual control valve 9 facilitate manual adjustment of the water flow to avoid water flow malfunction due to solenoid valve failure.

[0035] In another specific embodiment, the cooling water pipe 18 is made of stainless steel with a diameter of DN100. The cooling water pipe 18 has good corrosion resistance and anti-scaling properties, which reduces the possibility of pipe scaling and corrosion, eliminates the need for frequent pipe cleaning, and reduces maintenance costs and downtime.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A cooling device for the hydraulic oil tank of a dry ash removal machine in a thermal power plant, characterized in that, include: Cooling water pipe (18) is bent and arranged inside the hydraulic oil tank (15) to be cooled; Water supply pipelines, including industrial reclaimed water pipelines (13) and industrial water pipelines (14) connected in parallel. The water inlet pipe (5) has a first end connected to the confluence end of the water supply pipe and a second end connected to the water inlet end of the cooling water pipe (18); the water inlet pipe (5) is provided with a water inlet flow sensor (6) and a water inlet flow regulating valve (8) in sequence along the water flow direction. The water outlet pipe (12) has its first end connected to the outlet end of the cooling water pipe (18) and its second end connected to the drain pipe (16); the water outlet pipe (12) is provided with a water flow regulating valve (10) and a water temperature sensor (11) in sequence along the water flow direction.

2. The hydraulic oil tank cooling device for a dry ash removal machine in a thermal power plant according to claim 1, characterized in that, The water inlet pipe (5) is also equipped with a manual water inlet control valve (7), which is located between the water inlet flow sensor (6) and the water inlet flow regulating valve (8).

3. The hydraulic oil tank cooling device for a dry ash removal machine in a thermal power plant according to claim 1, characterized in that, The water outlet pipe (12) is also equipped with a manual water outlet control valve (9), which is located between the water outlet flow regulating valve (10) and the water outlet temperature sensor (11).

4. The hydraulic oil tank cooling device for a dry ash removal machine in a thermal power plant according to claim 1, characterized in that, Both the inlet flow regulating valve (8) and the outlet flow regulating valve (10) are solenoid valves.

5. The hydraulic oil tank cooling device for a dry ash removal machine in a thermal power plant according to claim 4, characterized in that, Also includes: The controller is communicatively connected to the inlet flow sensor (6), the inlet flow regulating valve (8), the outlet temperature sensor (11), and the outlet flow regulating valve (10); The controller is configured to adjust the control current of the inlet flow regulating valve (8) and the outlet flow regulating valve (10) according to the outlet water temperature detected by the outlet water temperature sensor (11) to control the inlet flow and outlet flow respectively.

6. The hydraulic oil tank cooling device for a dry ash removal machine in a thermal power plant according to claim 1, characterized in that, The drainage pipe (16) is connected to the industrial wastewater pool.

7. The hydraulic oil tank cooling device for a dry ash removal machine in a thermal power plant according to claim 1, characterized in that, The water outlet pipe (12) is also equipped with a manual drain valve (17) for controlling the flow of water. The manual drain valve (17) is located downstream of the water outlet temperature sensor (11).

8. The hydraulic oil tank cooling device for a dry ash removal machine in a thermal power plant according to claim 1, characterized in that, Both the industrial recycled water pipeline (13) and the industrial water pipeline (14) are equipped with water control valves for controlling the flow of water.

9. The hydraulic oil tank cooling device for a dry ash removal machine in a thermal power plant according to claim 1, characterized in that, The cooling water pipe (18) is Z-shaped.

10. The hydraulic oil tank cooling device for a dry ash discharge machine in a thermal power plant according to claim 1, characterized in that, The cooling water pipe (18) is made of stainless steel.

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