Control cabinet important clamping piece temperature monitoring system based on steam turbine

Abstract

The utility model relates to the technical field of steam turbine control cabinet temperature monitoring, in particular to a temperature monitoring system for important clamping pieces of a control cabinet based on a steam turbine, which comprises a cabinet main body and a control station, a temperature sensor is arranged in the cabinet main body and is in communication connection with the control station; the inner wall of the cabinet main body is provided with a cooling water pipe which is distributed in a snakelike manner, and a water outlet and a water inlet of the cooling water pipe are connected to a cooling water tank; the cooling water tank is arranged outside the cabinet main body, and the bottom of the cooling water tank is grounded; a liquid level sensor for monitoring the liquid level of the water tank is arranged in the water tank and is in communication connection with the control station; a variable-frequency pump is arranged in the cooling water tank; an outlet of the variable-frequency pump is connected with a water inlet of the cooling water pipe; a contactor used for controlling starting and stopping of the variable frequency pump and a frequency converter used for controlling the frequency of the variable frequency pump are arranged in the cabinet body. According to the invention, rapid heat dissipation of the interior of the cabinet is realized, effective control of the internal temperature of the cabinet is ensured, normal operation of equipment is guaranteed, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature monitoring of a steam turbine control cabinet, in particular to a temperature monitoring system for important card parts of a steam turbine control cabinet. Background Art

[0002] The TSI cabinet is a core component of the steam turbine monitoring instrumentation system, primarily used to monitor and protect the safe operation of the steam turbine unit. It receives sensor signals from various parts of the steam turbine, such as vibration, displacement, and speed, and processes and analyzes these signals to determine the turbine's operating status. When an abnormality is detected, the TSI system promptly issues an alarm or even triggers an emergency shutdown to prevent damage to the turbine or accidents. Therefore, it is widely used in various large steam turbine generator sets, such as power plants and chemical plants. In these environments, steam turbines must operate continuously, so the TSI cabinet also requires 24-hour uninterrupted monitoring and protection. Prolonged, high-power operation generates significant heat in the TSI cabinet. To ensure the proper operation of the TSI system, the TSI cabinet requires heat dissipation and effective monitoring.

[0003] However, due to the strict safety and production control requirements of the TSI cabinet, non-professionals are strictly prohibited from approaching or opening the cabinet door. Consequently, the TSI cabinet's temperature can only be sensed by thermometers and hygrometers placed outside the cabinet. During inspections, maintenance personnel can only make judgments and keep records by observing the thermometers and hygrometers. However, abnormal internal cabinet temperatures are difficult to detect in a timely manner. If the internal cabinet temperature rises, it can easily cause fires and other accidents, shorten the service life of important equipment components within the cabinet, and affect the monitoring accuracy of the turbine, affecting its stable operation and even causing significant economic losses and safety accidents.

[0004] Although measures have been taken to install a central air conditioning system in the room where the TSI cabinet is located to regulate the indoor temperature and cool it down, which has achieved certain results, the heat dissipation effect is not optimal because the cabinet door is closed for a long time. In addition, the TSI cabinet is also equipped with a cooling fan and fan filter. However, since the static pressure is greatest near the fan, the air flow rate is low, resulting in less than ideal heat dissipation inside. Therefore, when considering the layout of components and cards inside the cabinet, it is necessary to avoid local hot spots and arrange fans and filters reasonably to ensure air circulation, which further increases the difficulty of heat dissipation. It is difficult to improve the heat dissipation efficiency inside the TSI cabinet, and it also requires frequent inspections by personnel, which is time-consuming and labor-intensive, and increases the maintenance workload.

[0005] Therefore, in order to solve the problem that the internal temperature heat dissipation effect of the existing TSI cabinet is poor and the temperature rise is not easy to be discovered and regulated in time, it is now necessary to provide a temperature monitoring system for important card parts of the control cabinet based on the turbine. Utility Model Content

[0006] The utility model aims to provide a temperature monitoring system for important card parts of a control cabinet based on a steam turbine, so as to solve the problem that the internal temperature heat dissipation effect of the TSI cabinet is poor and the temperature rise is difficult to be discovered and regulated in time.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides a temperature monitoring system for important card parts of a control cabinet based on a steam turbine. By installing a temperature control device in the cabinet and adopting an automatic cooling device, the temperature inside the cabinet can be quickly cooled, thereby effectively controlling the internal temperature, ensuring the long-term safe operation of important equipment cards, saving human resources, and reducing fire risks. Specifically, a temperature monitoring system for important components of a control cabinet based on a steam turbine is provided, which includes a cabinet body and a control station communicatively connected to the cabinet body; a temperature sensor is provided in the cabinet body, which monitors the internal temperature of the cabinet in real time and is communicatively connected to the control station; a serpentine cooling water pipe is provided on the inner wall of the cabinet body, and the water outlet and water inlet of the cooling water pipe are both connected to a cooling water tank; the cooling water tank is arranged outside the cabinet body, and the bottom of the cooling water tank is grounded; a liquid level sensor for monitoring the water tank liquid level is provided in the cooling water tank, and the liquid level sensor is communicatively connected to the control station; a variable frequency pump is provided in the cooling water tank, and the outlet of the variable frequency pump is connected to the water inlet of the cooling water pipe; a contactor for controlling the start and stop of the variable frequency pump and a frequency converter for controlling the frequency of the variable frequency pump are provided in the cabinet body.

[0009] The principles and advantages of this solution are:

[0010] Because TSI cabinets operate under heavy loads and generate significant heat, conventional cooling methods use fans to accelerate internal convection and thereby reduce internal temperatures. However, because static pressure is highest near the fans and air velocity is slow, cooling in this area is suboptimal, impacting the cooling of critical components within the cabinet. Furthermore, when arranging components and components within the cabinet, careful attention must be paid to the placement of fans and filters to avoid localized hot spots. This makes achieving optimal cooling within the cabinet even more difficult.

[0011] If more fans or other heat dissipation structures are used, the number of components in the cabinet will increase, the failure rate will increase, and too many fans running at the same time will generate vibrations that affect the normal operation of the internal components of the cabinet.

[0012] Therefore, this solution does not aim to completely cool the temperature inside the cabinet, but rather to quickly remove the heat from the cabinet through heat exchange. Therefore, this solution uses a combination of temperature sensors and cooling water pipes to control the frequency of the variable frequency pump through temperature feedback information, thereby controlling the flow of coolant entering the cooling water pipe. In this way, the water flow rate is used to quickly remove the heat from the cabinet, thereby achieving the effect of heat dissipation and realizing dynamic regulation of the temperature inside the cabinet. At the same time, the structure adopted is simple, which will not increase the operating burden of the cabinet too much, and will also reduce the inspection workload of maintenance personnel. When an abnormality occurs, it can be discovered in time and corresponding measures can be taken.

[0013] Furthermore, a water outlet pipe is provided on one side of the cooling water tank, and the water outlet pipe is connected to the outlet of the variable frequency pump and connected to the water inlet of the cooling water pipe; a return water pipeline is provided on the upper part of the cooling water tank, and the water outlet of the cooling water pipe is connected to the return water pipeline to form a loop circulation.

[0014] Furthermore, the cooling water pipes are distributed in a serpentine shape on the left side, right side and back side of the cabinet body. The diameter of the cooling water pipes on each side is 10-20mm, the total height is 2000-2300mm, and the distance between the adjacent bent cooling water pipes is 100-150mm. The serpentine state is adopted to expand the cooling area of ​​the cooling water pipes, while controlling the total height of the water pipes on each side, concentrating on absorbing heat in the parts with higher temperatures, and reducing the laying of water pipes in places with relatively low temperatures (such as the top of the cabinet), and ensuring uniform distribution of water pipes, so that the coolant can quickly complete the absorption of heat and return to the cooling water tank in a short time to exchange heat and cool down, so as to achieve the effect of quickly bringing the temperature inside the cabinet out in a short time, thereby dissipating heat and cooling the interior of the cabinet.

[0015] Furthermore, a first manual isolation door is provided at the outlet of the variable frequency pump, and a second manual isolation door is provided at the outlet of the cooling water pipe. Combined with the manual control mode, this makes the control method more flexible and not completely dependent on automated command control, ensuring the normal operation of the equipment and enabling faster control measures and response methods in emergency situations.

[0016] Furthermore, a dedicated power supply is provided within the cabinet body and is connected to the variable frequency pump. Using a separate power supply to power the variable frequency pump ensures power stability and safety, reduces fluctuations in the variable frequency pump, and improves control accuracy.

[0017] Furthermore, a liquid level sensor is provided in the cooling water tank and is in communication with the control station. The liquid level sensor monitors the liquid level changes in the cooling water tank in real time and implements a protective interlock for the variable frequency pump to ensure stable and safe operation of the variable frequency pump.

[0018] Furthermore, the cooling water tank is 500 mm long, 300 mm wide, and 400 mm high, and is filled with self-made coolant. This ensures that the volume of the cooling water tank meets safety installation requirements while also ensuring that the coolant capacity achieves a cooling circulation effect.

[0019] Furthermore, the self-processed coolant has a SiO2 content of less than 10 μg / L, an electrical conductivity of less than 1 μs / cm, and Cu, Fe, and Na ion contents of less than 10 μg / L. Using self-processed, finely treated cooling water ensures no corrosion to the copper pipes of the cooling water pipes, ensuring safe, long-term use, extending service life, and improving economic benefits.

[0020] Furthermore, the cooling water pipes are soft copper pipes. Using soft copper pipes helps to evenly distribute the cooling water pipes on the inner wall of the cabinet body, while ensuring the heat transfer efficiency of the cooling water pipes, quickly bringing the temperature inside the cabinet out, and achieving a rapid heat dissipation effect.

[0021] Furthermore, a track is provided at the bottom of the cabinet body, the lower end of the track is grounded, an insulating rubber layer is provided on the upper part of the track, and the lower end of the cabinet body is in contact with the insulating rubber layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the temperature monitoring system for important card parts of the control cabinet based on the steam turbine of the utility model. DETAILED DESCRIPTION

[0023] The following is further described in detail through specific implementation methods:

[0024] The reference numerals in the drawings of the specification include: cabinet body 1, cooling water tank 2, cooling water pipe 3, water outlet 4, water inlet 5, variable frequency pump 6, water outlet pipe 7, return water pipe 8, liquid level sensor 9, contactor 10, inverter 11, cabinet door 12.

[0025] Example 1

[0026] This embodiment is basically as shown in the attached Figure 1As shown: Based on the temperature monitoring system of important components of the control cabinet of the steam turbine, this research project installs temperature control equipment in the cabinet body to effectively control the temperature inside the cabinet, ensure the long-term safe operation of important components in the cabinet, reduce the workload of manual maintenance, and improve the efficiency of temperature control inside the cabinet, improve the heat dissipation effect of the cabinet, and reduce safety risks. Specifically, the temperature monitoring system is a new type of TSI control cabinet important component temperature monitoring system, including a cabinet body 1 installed in the machine room, and a control station connected to the cabinet body 1. In this embodiment, the central air-conditioning control system is installed inside the machine room to control the temperature inside the machine room, so that the room temperature in the machine room is maintained at 20-35°C, ensuring the constant temperature outside the cabinet, and reducing the heat as much as possible to promote the heat dissipation effect.

[0027] A track is installed at the bottom of cabinet body 1, with the lower end of the track grounded. An insulating layer is applied to the upper portion of the track, with the lower end of cabinet body 1 in contact with the insulating layer. This ensures proper installation and safe operation of cabinet body 1, preventing accidents caused by electrical leakage. A cooling water tank 2 is installed outside cabinet body 1, with the bottom of cooling water tank 2 grounded to ensure safe operation and provide effective protective measures.

[0028] In this embodiment, a temperature sensor is installed within the cabinet body 1. This temperature sensor is wired to key components within the cabinet and communicates with the control station. This transmits monitored temperature data to the control terminal for real-time display. This temperature is used to automatically control the cooling of the variable frequency pump 6, thereby monitoring the temperature of key equipment components within the computer room. In this embodiment, the temperature sensor utilizes a thermal resistor installed near key components within the cabinet, acquiring temperature data from these components via a wired connection.

[0029] A serpentine-shaped cooling water pipe 3 is installed on the inner wall of the cabinet body 1. In this embodiment, the cooling water pipe 3 is made of soft copper tube, which is easy to bend and install, improves heat exchange efficiency, achieves rapid heat absorption, effectively avoids corrosion, and prolongs service life. The cooling water pipe 3 is serpentinely distributed on the left, right, and back sides of the cabinet body 1. Excluding the three sides of the cabinet body 1 door, the total height of the cooling water pipe on each side is set to 2000-2300mm. This expands the cooling area of ​​the cooling water pipe 3. At the same time, the cooling water pipe is laid less in areas with lower temperatures to shorten the flow path of the coolant, allowing the coolant to quickly complete heat exchange and be carried out of the cabinet, reducing its residence time inside. The distance between adjacent cooling water pipes at each bend of the serpentine cooling water pipe 3 is set to 100-150mm to ensure uniform distribution of the cooling water pipe 3 and quickly absorb heat from areas with higher temperature concentrations. In this embodiment, the cooling water pipe diameter is set to 10-20mm, ensuring sufficient coolant flow in the cooling water pipe, reducing cooling time and improving heat dissipation efficiency.

[0030] In this embodiment, the water outlet 4 and water inlet 5 of the cooling water pipe 3 are both connected to the cooling water tank 2. The water outlet 4 and water inlet 5 of the cooling water pipe 3 are both provided at the lower end of the cabinet body 1. During installation, the water inlet 5 of the cooling water pipe 3 starts from one side of the cooling water tank 2, goes around the bottom of the cabinet door of the cabinet body 1, and is arranged in a serpentine shape from top to bottom on the cabinet wall on the side opposite to the cooling water tank 2. It is then arranged in a serpentine shape from bottom to top on the adjacent cabinet wall, that is, on the side wall opposite to the cabinet door. Finally, it is arranged in a serpentine shape from top to bottom on the cabinet wall on the side close to the cooling water tank 2, thereby connecting with the water outlet and returning to the cooling water tank 2.

[0031] In this embodiment, the length of the cooling water tank 2 is set to 500mm, the width is set to 300mm, and the height is set to 400mm. This ensures that the cooling water tank 2 meets the safety production requirements and reduces safety risks, while being able to load enough coolant to quickly remove the heat inside the cabinet and achieve the effect of cooling. In this embodiment, a homemade coolant is installed in the cooling water tank 2. The homemade coolant is a cooling water with a SiO2 content of less than 10μg / L, an electrical conductivity of less than 1μs / cm, and a Cu, Fe, Na ion content of less than 10μg / L after fine treatment, so that it does not corrode the copper pipe, thereby enabling safe and long-term use, achieving repeated recycling, improving utilization efficiency, and extending the service life of the copper pipe.

[0032] A variable frequency pump 6 is installed in the cooling water tank 2, and the outlet of the variable frequency pump 6 is connected to the water inlet 5. In this embodiment, the variable frequency pump 6 adopts an invasive variable frequency pump and is placed in the cooling water tank 2 to ensure the effective use and safe operation of the variable frequency pump 6. At the same time, a dedicated power supply is taken from the cabinet body 1, and the dedicated power supply is connected to the variable frequency pump 6 for use by the variable frequency pump 6. In this embodiment, the dedicated power supply adopts 220VAC, 50Hz to ensure the stable operation of the variable frequency pump 6 and improve the control accuracy and efficiency. An outlet pipe 7 is installed on one side of the cooling water tank 2, one end of the outlet pipe 7 is connected to the outlet of the variable frequency pump 6, and the other end is connected to the water inlet of the cooling water pipe 3. At the same time, a first manual isolation door is installed at the outlet of the variable frequency pump 6, and manual control can be achieved through the first manual isolation door, which is convenient for active control and adjustment and improves control flexibility.

[0033] A return line 8 is installed above cooling water tank 2. Outlet 4 of cooling water pipe 3 is connected to this line. This line returns the coolant to cooling water tank 2, where it is naturally cooled by the indoor ambient temperature, continuing the cycle. A second manual isolation door is also installed at the outlet of cooling water pipe 3. This allows for manual control, facilitating active control and adjustment, and enhancing control flexibility.

[0034] A liquid level sensor 9 is also installed in the cooling water tank 2, and the liquid level sensor 9 is connected to the control station. The liquid level information of the coolant in the cooling water tank 2 can be obtained in real time through the liquid level sensor 9, so that corresponding control measures can be taken in time.

[0035] In this embodiment, a contactor 10 for controlling the start and stop of the variable frequency pump 6 and a frequency converter 11 for controlling the frequency of the variable frequency pump 6 are installed within the cabinet body 1. A control station is in communication with the contactor 10, and based on instructions issued by the control station, the contactor 10 controls the start and stop of the variable frequency pump 6. Similarly, the control station is in communication with the frequency converter 11, and based on the internal temperature information obtained, the control station issues instructions to control the frequency converter 11 to control the frequency of the variable frequency pump 6, thereby increasing or decreasing the frequency of the variable frequency pump 6 and, in turn, controlling the water output flow of the variable frequency pump 6.

[0036] The specific implementation process is as follows:

[0037] As attached Figure 1 As shown, the real-time temperature of important components inside the cabinet body 1 is obtained through a temperature sensor and the temperature data is transmitted to the control station. At the same time, the liquid level information of the current coolant in the cooling water tank 2 is obtained through the liquid level sensor 9. When the water level is determined to be normal (i.e., the water level is higher than 180mm) and the temperature inside the cabinet is not lower than 22°C, the variable frequency pump 6 is allowed to start. At this time, the variable frequency pump 6 pumps the coolant in the cooling water tank 2 into the copper pipe bundle in the TSI cabinet to cool the cabinet. That is, the temperature inside the cabinet is quickly exchanged and the coolant is carried out of the cabinet along the flow of the coolant, returning to the cooling water tank 2. The cooling water tank 2 is naturally cooled at the indoor ambient temperature, thereby achieving a cooling effect on the interior of the cabinet, and the cycle continues.

[0038] At the same time, by monitoring the internal temperature of the cabinet, the frequency of the variable frequency pump 6 can be adjusted through the frequency converter, thereby controlling the flow of the coolant and achieving the effect of controlling the internal temperature of the cabinet.

[0039] When the liquid level sensor 9 detects that the water level in the cooling water tank 2 is lower than 100 mm, the contactor 10 is controlled to trip the variable frequency pump 6 to protect the operation of the variable frequency pump 6. When the temperature is lower than 16°C, the operation of the variable frequency pump 6 is stopped.

[0040] At the same time, if the temperature inside the cabinet is detected to be higher than 28°C, the variable frequency pump 6 will be automatically started and the frequency conversion instruction will be set to the maximum (i.e. 50Hz) for automatic cooling. When the temperature drops to 22°C, the frequency of the variable frequency pump 6 will be reduced to 20Hz to maintain a stable cooling function.

[0041] In this embodiment, a temperature sensor is installed within the cabinet body 1 to obtain real-time temperature information from important components within the cabinet. Based on the internal temperature, the cooling water tank 2 is automatically started and stopped to cool and dissipate heat within the cabinet, thereby further effectively controlling the temperature within the cabinet. This reduces the need for maintenance personnel to conduct frequent inspections and workload. It also ensures rapid monitoring of the cabinet's internal temperature, ensuring the long-term stable operation of components within the cabinet and reducing safety risks. Automatic control is achieved, and an alarm alerts operational supervisors when the cabinet's internal temperature is abnormal, allowing operators to promptly detect and quickly address any anomalies.

[0042] The structure and dimensions of cooling water tank 2 are designed in accordance with safety regulations and are grounded to ensure installation feasibility. This solution also features a simple structural design, eliminating the need for additional circuitry within the cabinet itself, thus reducing the operational burden on the cabinet itself. Furthermore, the water flow within cooling water pipe 3 rapidly dissipates heat within the cabinet, accelerating internal heat dissipation and allowing for the reuse of the coolant. This improves cooling efficiency and increases coolant utilization.

[0043] The above is only an example of the research project of this utility model. The common knowledge such as the specific technical solutions and / or features in the solution are not described in detail here. It should be pointed out that for those skilled in the art, several variations and improvements can be made without departing from the technical solution of this utility model. These should also be regarded as the scope of protection of this utility model. These will not affect the effect of the implementation of this utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims. The specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. The temperature monitoring system for important components of the control cabinet based on steam turbine is characterized by: It includes a cabinet body and a control station communicatively connected to the cabinet body; a temperature sensor is provided in the cabinet body, which monitors the internal temperature of the cabinet in real time and is communicatively connected to the control station; a serpentine cooling water pipe is provided on the inner wall of the cabinet body, and the water outlet and water inlet of the cooling water pipe are both connected to a cooling water tank; the cooling water tank is arranged outside the cabinet body, and the bottom of the cooling water tank is grounded; a liquid level sensor for monitoring the water tank liquid level is provided in the cooling water tank, and the liquid level sensor is communicatively connected to the control station; a variable frequency pump is provided in the cooling water tank, and the outlet of the variable frequency pump is connected to the water inlet of the cooling water pipe; a contactor for controlling the start and stop of the variable frequency pump, and a frequency converter for controlling the frequency of the variable frequency pump are provided in the cabinet body.

2. The temperature monitoring system for important components of a control cabinet for a steam turbine according to claim 1 is characterized in that: A water outlet pipe is provided on one side of the cooling water tank, which is connected to the outlet of the variable frequency pump and connected to the water inlet of the cooling water pipe; a return water pipeline is provided on the upper part of the cooling water tank, and the outlet of the cooling water pipe is connected to the return water pipeline.

3. The temperature monitoring system for important components of a control cabinet for a steam turbine according to claim 1 is characterized in that: The cooling water pipes are distributed in a serpentine shape on the left side, right side and back side of the cabinet body. The diameter of the cooling water pipe on each side is 10-20mm, the total height is 2000-2300mm, and the distance between adjacent bent cooling water pipes is 100-150mm.

4. The temperature monitoring system for important components of a control cabinet based on a steam turbine according to claim 2 is characterized in that: A first manual isolation door is provided at the outlet of the variable frequency pump.

5. The temperature monitoring system for important components of a control cabinet based on a steam turbine according to claim 1 is characterized in that: A dedicated power supply is provided in the cabinet body, and the dedicated power supply is connected to the variable frequency pump.

6. The temperature monitoring system for important components of a control cabinet based on a steam turbine according to claim 1 is characterized in that: A second manual isolation door is provided at the water outlet of the cooling water pipe.

7. The temperature monitoring system for important components of a control cabinet based on a steam turbine according to claim 1 is characterized in that: The cooling water tank has a length of 500 mm, a width of 300 mm and a height of 400 mm; the cooling water tank is filled with self-made coolant.

8. The temperature monitoring system for important components of a control cabinet for a steam turbine according to claim 7 is characterized in that: The self-made coolant is cooling water with a SiO2 content of less than 10 μg / L, an electrical conductivity of less than 1 μs / cm, and Cu, Fe, and Na ion contents all less than 10 μg / L.

9. The temperature monitoring system for important components of a control cabinet based on a steam turbine according to claim 1 is characterized in that: The cooling water pipe is a soft copper pipe.

10. The temperature monitoring system for important components of a control cabinet based on a steam turbine according to claim 1, characterized in that: A track is further provided at the bottom of the cabinet body, the lower end of the track is grounded, an insulating rubber layer is provided on the upper part of the track, and the lower end of the cabinet body is in contact with the insulating rubber layer.

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