Replaceable vertical water temperature observation device for water inlet of power station

Abstract

The utility model belongs to the technical field of water conservancy and hydropower engineering, and discloses a replaceable power station water inlet vertical water temperature observation device which comprises a temperature measuring assembly, a conveying mechanism and a guiding mechanism. The temperature measuring assembly comprises a plurality of water temperature probes and a data transmission line, the plurality of water temperature probes are uniformly distributed along the length direction of the data transmission line, and the water temperature probes are connected with the data transmission line; the conveying mechanism comprises a first driving mechanism, a second driving mechanism and a steel cable, and the two ends of the steel cable are fixed to the first driving mechanism and the second driving mechanism correspondingly and used for driving the steel cable to ascend and descend. The guiding mechanism comprises a first guiding pipe and a second guiding pipe which are arranged in parallel, the steel cable sequentially penetrates through the first guiding pipe and the second guiding pipe, and a data transmission line connected with a water temperature probe is fixed to the steel cable in the first guiding pipe or the second guiding pipe. According to the utility model, the water temperature change can be accurately monitored, high-precision data support is provided, and a reliable basis is provided for water quality management and ecological scheduling of a power station.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of water conservancy and hydropower engineering, and relates to water temperature monitoring of hydropower stations, in particular to a replaceable vertical water temperature observation device for the water inlet of a hydropower station. BACKGROUND

[0002] Reservoir water temperature has a profound impact on the ecological environment, physical and chemical properties, and water quality changes of the water body, and detailed water temperature data is of great significance to reservoir water quality management and ecological scheduling research. After the dam is built, the difference between the discharged water temperature of the reservoir and the natural water temperature of the river becomes significant, and this difference may have a series of negative impacts on the downstream ecology, including affecting the growth and reproduction of fish, changing the growth conditions of crops, and posing potential threats to water quality and ecological balance. During the operation of the power station, the water temperature in front of the water intake directly affects the working efficiency of the unit cooling system, and excessively high or low water temperature may lead to reduced cooling efficiency, thereby affecting the safe operation and power generation capacity of the power station. According to the requirements of the "Hydropower Engineering Ecological Discharge Specification", it is particularly important to monitor the vertical gradient data of the water temperature in front of the layered water inlet in real time, which not only provides decision support for the reasonable scheduling of ecological flow, but also provides scientific basis for the optimized operation of the water turbine cooling system. Therefore, accurately obtaining the water temperature data in front of the water intake is of great significance to improving the management efficiency of the reservoir and the power station and ensuring the stability of the downstream ecological environment and water quality.

[0003] Currently, the water temperature monitoring methods commonly used in the industry have a series of technical defects, which limit their effectiveness and accuracy in actual application. First, single-point monitoring, by installing independent temperature sensors at fixed depths, cannot fully reflect the vertical overall temperature stratification characteristics of the water, especially in water bodies with obvious stratification. This monitoring method cannot accurately capture the dynamic changes of the thermocline. Second, the lag of traditional manual measurement affects the timeliness and accuracy of the data; although periodic profile measurement with a portable temperature meter can obtain certain water temperature data, the data continuity is poor due to low measurement frequency and difficulty in implementation in adverse weather conditions, which cannot reflect the real-time changes in water temperature, thereby affecting timely decision-making for water quality control and ecological protection. In addition, the existing integrated equipment lacks adaptability, especially the stability of the floating platform in actual application is poor, it is easily impacted by the high-speed water flow at the water inlet, and it is difficult to resist the impact of floating objects in the reservoir area, resulting in a high damage rate of the sensor array of up to 37% (according to the statistics of the 2022 hydropower equipment operation and maintenance report). It is particularly worth noting that the front edge area of the water inlet is affected by the blocking of the trash screen and the suction of the unit, forming complex vortices and sediment accumulation; the traditional fixed support type temperature measurement device is prone to cable entanglement in this environment, and the floating equipment using wireless transmission also faces the problem of signal shielding by metal structures. Moreover, biological attachment and pollution of the sensor probe caused by high turbidity of the water body further reduces the reliability of long-term monitoring of the existing equipment.

[0004] Therefore, the technical defects of the existing monitoring equipment seriously limit the accuracy and stability of water temperature monitoring, and it is urgent to develop a water temperature monitoring device with vertical continuous monitoring capability, water flow impact resistance and convenient maintenance, to provide higher precision, real-time and long-time continuous water temperature data, and meet the dual needs of ecological environmental protection and efficient operation of the hydropower station. Practical new type content

[0005] The utility model aims at the deficiency in prior art, provides a replaceable water temperature observation device for hydropower station inlet, to solve the problem of poor data continuity, weak water flow impact resistance, difficult equipment maintenance and other problems existing in the prior art observation method, and provides a scientific basis for the dispatching operation and environmental management of the reservoir. The utility model not only can improve the accuracy and reliability of water temperature monitoring, but also can effectively cope with the interference in the complex water flow environment, and solve the adaptability problem of the existing monitoring equipment in high flow rate and high turbidity water body.

[0006] The technical scheme adopted by the utility model is:

[0007] A replaceable water temperature observation device for hydropower station inlet, comprising a temperature measurement assembly, a transmission mechanism and a guide mechanism.

[0008] The temperature measurement assembly comprises a plurality of water temperature probes and a data transmission line, a plurality of water temperature probes are uniformly arranged along the length direction of the data transmission line, and the water temperature probe is connected with the data transmission line.

[0009] The transmission mechanism comprises a first driving mechanism, a second driving mechanism and a steel cable, the steel cable is fixed at the first driving mechanism and the second driving mechanism at both ends, and is used for driving the steel cable to lift.

[0010] The guide mechanism is located below the transmission mechanism, the guide mechanism comprises a first guide pipe and a second guide pipe arranged in parallel, the steel cable passes through the first guide pipe and the second guide pipe in sequence, and the data transmission line connected with the water temperature probe is fixed on the steel cable in the first guide pipe or the second guide pipe.

[0011] In an implementable mode, the water temperature probe uses a temperature sensor, and the spacing between two adjacent water temperature probes is 1m-3m.

[0012] In an implementable mode, the first driving mechanism and the second driving mechanism use a winch.

[0013] In an implementable mode, the diameter of the steel cable is 6mm-8mm.

[0014] In an implementable manner, the first guide pipe and the second guide pipe are of the same structure, and the axes of both are perpendicular to the horizontal plane; a plurality of through holes are uniformly arranged on the pipe wall of the first guide pipe and the second guide pipe. Further, two rows of through holes are arranged along the length direction of the first guide pipe / second guide pipe, and the positions of the two rows of through holes are symmetrically arranged along the axis of the first guide pipe / second guide pipe. The diameter of the through hole is 18mm-22mm; and the spacing between adjacent two through holes along the length direction of the first guide pipe and the second guide pipe is 10cm-20cm.

[0015] In an implementable manner, the outer diameter of the first guide pipe and the second guide pipe is 150mm-200mm, and the wall thickness is 5mm-15mm.

[0016] In an implementable manner, the guide mechanism further comprises a fixed pulley, and the fixed pulley is arranged below the first guide pipe and the second guide pipe. Further, the center of the fixed pulley is located on the symmetry line of the first guide pipe and the second guide pipe.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) The utility model discloses a data transmission line connected with the water temperature probe is arranged on the steel cable, and the steel cable is passed through the guide mechanism vertically arranged in the water, so that the water temperature probe can be vertically moved in different depth ranges, the water temperature change is accurately monitored, high-precision data support is provided, and reliable basis is provided for the water quality management and ecological scheduling of the power station.

[0019] (2) The utility model discloses a data transmission line and water temperature probe are protected by the guide pipe, so that the device has stronger impact resistance, can adapt to the complex water environment in front of the water inlet, and ensures long-term stable operation of the device.

[0020] (3) The utility model discloses a conveying mechanism drives the steel cable to move in the guide pipe, so that the adjustment, replacement and maintenance of the water temperature probe can be conveniently and quickly realized, and the operability and maintenance efficiency of the monitoring device are greatly improved.

[0021] (4) The fixed pulley in the utility model is designed to make the movement of the steel cable more smooth, reduce friction, and prolong the service life of the equipment.

[0022] Therefore, the innovative design of the device significantly improves the stability, accuracy and maintenance convenience of the water temperature monitoring device of the hydropower station, solves the problems of the traditional water temperature monitoring device, such as great maintenance difficulty and poor monitoring accuracy, and has a wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1The overall structure schematic diagram of the replaceable power station water inlet vertical water temperature observation device is provided.

[0024] Figure 2 The schematic diagram of the replaceable power station water inlet vertical water temperature observation device layout position in a hydropower station.

[0025] In the figure: 1-temperature measuring assembly;11-water temperature probe;12-data transmission line;2-transport mechanism;21-first drive mechanism;22-second drive mechanism;23-steel cable;3-guide pipe;31-first guide pipe;32-second guide pipe;33-through hole;34-fixed pulley. DETAILED DESCRIPTION

[0026] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described below are only used to explain and describe the utility model, and will not limit the protection scope of the utility model.

[0027] The terms "first", "second" and the like in the specification, claims, embodiments of the utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence.

[0028] The utility model is further described in detail below through the preferred specific embodiments.

[0029] The utility model provides a replaceable power station water inlet vertical water temperature observation device for the problems of difficult probe maintenance, insufficient monitoring system stability and large influence of water flow impact on water temperature observation before the power station water inlet, the device provides stable measurement path for the water temperature probe through the parallel layout guide mechanism, and through the transport mechanism, the water temperature probe can be monitored at different water depth, and the probe can be replaced at any time and the probe spacing can be adjusted according to the water temperature characteristics, the maintenance convenience and service life of the system are greatly improved. The utility model reasonably designs the layout mode of the water temperature probe, device operation mode and the like to ensure the continuity, accuracy and reliability of water temperature monitoring before the power station water inlet, provides technical support for reservoir ecological regulation and power station operation optimization.

[0030] As Figure 1As shown, the replaceable water inlet vertical water temperature observation device of the power station provided by the utility model, including temperature measurement component 1, conveying mechanism 2 and guiding mechanism 3. Temperature measurement component 1 is used for measuring the water temperature of the water inlet of the power station, and conveying mechanism 2 is used for driving temperature measurement component 1 to move to the specified water depth in the water, so as to provide convenience for the maintenance or replacement of temperature measurement component 1. Guiding mechanism 3 is used for supporting and guiding the conveying of temperature measurement component 1 in the water, maintaining verticality in the water, and also providing a stable measurement channel for temperature measurement component 1, so that the measured water temperature is the vertical water temperature.

[0031] Specifically, as shown, Figure 1 Temperature measurement component 1 includes a plurality of water temperature probes 11 and a data transmission line 12, and the plurality of water temperature probes 11 are uniformly arranged along the length direction of the data transmission line 12, and the water temperature probes 11 are connected with the data transmission line; the spacing between the adjacent two water temperature probes is 1m~3m, and can be adjusted in real time according to the water temperature stratification and observation requirements. For the thermocline area with large temperature gradient, the density can be appropriately increased to ensure the comprehensiveness and accuracy of the monitoring data.

[0032] The above-mentioned water temperature probe 11 is used for detecting water temperature, and can adopt a digital temperature sensor, for example, a temperature sensor with model ISD4000, DD1850, ACEZ, HR8800S, etc., the temperature measurement range is-5℃ to 50℃, the temperature measurement accuracy is ±0.05℃, and the accuracy requirement of the vertical water temperature monitoring in front of the water inlet of the power station can be met. In addition, for different water temperature monitoring requirements, the probe can be replaced at any time, so that the accuracy and distribution meet the current observation requirements, and the adaptability is high. At the same time, it should be ensured that the water temperature probe can be soaked in water for a long time and resist silt scouring and water flow impact, so as to ensure long-term stable operation in a high water pressure environment.

[0033] The above-mentioned data transmission line 12 is used for connecting the water temperature probe 11 and is responsible for transmitting the water temperature monitoring data to the monitoring system in real time. The data transmission line adopts a shielded cable, has the characteristics of water pressure resistance, corrosion resistance and electromagnetic interference resistance, and ensures long-term stable operation under water.

[0034] The above-mentioned conveying mechanism 2 includes a first driving mechanism 21, a second driving mechanism 22 and a steel cable 23; the two ends of the steel cable 23 are fixed on the first driving mechanism 21 and the second driving mechanism 22 respectively, and are used for driving the steel cable to ascend and descend in opposite directions.

[0035] The first driving mechanism 21 and the second driving mechanism 22 are used for controlling the winding and unwinding of the steel cable 23, so that the water temperature probe 11 can be flexibly adjusted in different depth ranges and quickly retracted to the ground for replacement or maintenance when needed. The first driving mechanism 21 and the second driving mechanism 22 both use a winch. In actual operation, the rated load capacity of the winch is preferably 300-500 kg, which ensures that the weight of the steel cable 23 and the additional pulling force caused by the water flow can be safely borne. The winch in the utility model can be a XY-300 type electric winch, which has an automatic braking system and can stably lock the steel cable 23 in any state to prevent accidental slipping or position deviation.

[0036] The steel cable 23 is used for fixing the data transmission line 12 and bearing the pulling force of the data transmission line 12, so that the water temperature probe 11 can be stably adjusted in different temperature ranges underwater. Specifically, the data transmission line 12 can be arranged in parallel with the steel cable 23 and fixed at an interval of 50 cm by using nylon straps, so that it will not deviate or loosen due to the change of the pulling force of the steel cable or the influence of the water flow when the probe is raised and lowered. In order to ensure the stability and tensile strength of the steel cable 13 in the long-term underwater environment and to avoid the breakage or deformation of the steel cable 23 in long-term use, the steel cable 13 in the utility model is made of 304 or 316L stainless steel, has a diameter of 6-8 mm, and has a bearing capacity of ≥500 kg.

[0037] The guide mechanism 3 includes a first guide pipe 31 and a second guide pipe 32 arranged in parallel. The steel cable 23 passes through the first guide pipe 31 and the second guide pipe 32 in sequence, and the data transmission line 12 connected with the water temperature probe 11 is fixed on the steel cable 23 in the first guide pipe 31 or the second guide pipe 32. The first guide pipe 31 and the second guide pipe 32 are used for supporting the steel cable and providing a stable measurement channel for the water temperature probe. The first guide pipe 31 and the second guide pipe 32 are structurally identical, and the axes of the first guide pipe 31 and the second guide pipe 32 are both perpendicular to the horizontal plane. A plurality of through holes 33 are uniformly arranged on the pipe wall of the first guide pipe 31 and the second guide pipe 32, so that the water flow can enter the inside of the pipe to ensure that the water temperature probe can fully contact the external water body and improve the temperature measurement accuracy. Further, two rows of through holes 33 can be arranged along the length direction of the first guide pipe 31 (or the second guide pipe 32), and the positions of the two rows of through holes 33 are symmetrically arranged along the axis of the first guide pipe 31 (or the second guide pipe 32). The diameter of the through hole 33 is 18-22 mm and is uniformly distributed along the length direction of the steel pipe. In order to improve the water permeability of the steel pipe and ensure the observation accuracy, the spacing between adjacent two through holes is 10-20 cm, so as to ensure that the water flow uniformly enters the inside of the steel pipe, reduces the flow interference, and improves the reliability of the temperature measurement data.

[0038] Since the water flow impact of the power plant inlet is large, in order to better resist the water flow impact, the first guide pipe 31 and the second guide pipe 32 are preferably stainless steel pipes, which can be 304 or 316L stainless steel materials; in this way, the first guide pipe 31 and the second guide pipe 32 have good corrosion resistance and wear resistance while resisting water flow impact, so that the entire monitoring device is suitable for long-term underwater working environment, prolonging the service life. The outer diameter of the first guide pipe 31 and the second guide pipe 32 is 150mm-200mm, the wall thickness is 5mm-15mm, and the length can be determined according to the depth of the inlet, so as to ensure that it covers the complete vertical water temperature profile before the inlet. The first guide pipe 31 and the second guide pipe 32 are fixed on the concrete wall beside the inlet by expansion bolts. Further, the first guide pipe 31 and the second guide pipe 32 can also be welded together.

[0039] In order to better collect and release the steel cable 23, conveniently and quickly maintain and replace the water temperature probe 11, and at the same time improve the operability and maintenance efficiency of the equipment and prolong the service life of the monitoring device, the guide mechanism 3 provided by the utility model further comprises a fixed pulley 34, which is arranged below the first guide pipe 31 and the second guide pipe 32.

[0040] The fixed pulley 34 is used to guide the operation of the steel cable 23, so that the water temperature probe 11 on the data transmission line 12 can smoothly slide inside the first guide pipe 31 or the second guide pipe 32, while reducing the friction resistance of the steel cable 23 during operation and improving the long-term reliability of the device. The fixed pulley 34 is made of stainless steel or hard aluminum alloy material with corrosion resistance, wear resistance, water flow impact resistance and other characteristics, and has a bearing capacity of more than 200Kg to adapt to long-term immersion and high flow rate environment. The diameter of the fixed pulley is preferably 80-100mm, and the wheel groove adopts an arc-shaped structure matching the diameter of the steel cable 23, so as to ensure uniform stress of the steel cable 23 and avoid breakage or fatigue damage of the steel cable 23 due to excessive local stress. Rolling bearings in contact with the steel cable 23 can be arranged inside the fixed pulley, which can reduce the friction of the steel cable 23 during sliding, improve the smoothness of operation, and prolong the service life of the equipment. The fixed pulley 34 is fixed by a stainless steel support installed on the concrete wall, and the fixed pulley is located below the first guide pipe 31 and the second guide pipe 32.

[0041] As Figure 2As shown, the vertical water temperature observation device for the replaceable water inlet of the power station is installed on the partition wall between the water inlet and the water inlet (in front of the main and auxiliary trash screen slots). The guide mechanism 3 is fixed to the concrete wall beside the water inlet. When installing the first guide pipe 31 and the second guide pipe 32, the first guide pipe 31 and the second guide pipe 32 are fixed on the concrete wall in front of the water inlet by expansion bolts and U-shaped clamps. Specifically, first, the fixing points of the first guide pipe 31 and the second guide pipe 32 are determined on the concrete wall, and the distance between the fixing points is 1.5-3 m to ensure the support strength; then, the impact drill is used to drill holes on the concrete surface, the hole diameter is 1 mm larger than the diameter of the expansion bolt, and the depth is not less than 60 mm to ensure the anchoring force; then, the expansion bolt is inserted into the hole, and the nut is tightened to expand the sleeve to tightly fit with the hole wall; finally, the U-shaped clamp is buckled to the first guide pipe 31 (or the second guide pipe 32), and the bottom flange plate is connected with the expansion bolt, and the nut is tightened to make the steel pipe tightly fit with the concrete wall to prevent shaking. For the area with strong water flow, transverse support structure perpendicular to the water flow direction can be added to further enhance the stability of the steel pipe and prevent loosening or displacement caused by long-term erosion. The transverse support structure can be a crossbeam at the upper and lower ends of the first guide pipe 31 and the second guide pipe 32, and the crossbeam is fixed at the ends of the concrete wall or the wall on both sides of the river by bolts. The fixed pulley 34 is fixed by a stainless steel support, which is fixed on the concrete wall by welding or expansion bolt to ensure that the fixed pulley does not deviate or loosen under the action of water flow and maintains long-term stable operation. All fasteners in this process are made of 304 or 316L stainless steel to adapt to the long-term underwater environment and improve the service life of the equipment.

[0042] One end of the steel cable 23 is fixed to the first driving mechanism 21, and the other end passes through the upper end of the first guide pipe 31, extends downward along the pipe, passes around the fixed pulley 34 at the bottom of the first guide pipe 31 and the second guide pipe 32, and finally is fixed to the second driving mechanism 22. Then drive the first driving mechanism 21 and the second driving mechanism 22 to retract and extend the steel cable 23, and fix the data transmission line 12 with the water temperature probe 11 on the steel cable 23, which moves into the second guide pipe 32 along with the steel cable 23. When the lowermost water temperature probe 11 on the data transmission line 12 reaches the bottom of the second guide pipe 32, stop driving the first driving mechanism 21 and the second driving mechanism 22. In this way, the data transmission line 12 maintains a stable motion trajectory inside the steel pipe, avoiding deviation or oscillation caused by water flow impact.

[0043] When the replaceable power plant water inlet vertical water temperature observation device is maintained, the steel cable can be retrieved through the transmission mechanism, so that the water temperature probe returns to the shore side platform. The operator can directly disassemble the damaged water temperature probe and install a new water temperature probe, avoiding the problem that the traditional monitoring device needs underwater operation or disassembly of the entire device. The device needs to be checked once every six months to ensure that the tension of the steel cable is appropriate, the pulley rotates smoothly, and the sensor signal is normal.

[0044] In summary, the replaceable power plant water inlet vertical water temperature observation device in the utility model overcomes the problems of the buoy device being easily impacted by water flow, difficulty in adjustment and maintenance, and has strong adaptability, durability, safety and stability. Compared with the manual measurement method, the device can realize long-term online monitoring without the need for regular manual measurement, reducing operation and maintenance costs. The double steel pipe + pulley + winch structure allows the water temperature probe to be freely lifted and quickly replaced, improving the convenience of adjusting and maintaining the device. At the same time, the device fixing method enhances the water flow impact resistance, making it suitable for high-speed water flow environments in front of the water inlet, ensuring long-term stable operation. Therefore, the utility model not only improves the stability, accuracy and maintenance convenience of the monitoring system, solves the problems of high maintenance difficulty and poor monitoring accuracy of traditional water temperature monitoring devices, but also can be applied to lake hydrological observation, ecological environment monitoring and other scenes, providing long-term stable water temperature monitoring data, and has a wide application prospect.

[0045] The preferred embodiments of the utility model are described in detail above in combination with the drawings, and typical known structures and known common knowledge technologies are not described in detail here. The skilled person in the art can improve and implement the technical solutions of the utility model based on their own ability under the inspiration of the present embodiment, and some typical known structures, known methods or known common knowledge technologies should not be an obstacle for the skilled person to implement the utility model.

[0046] The scope of protection required by the utility model should be subject to the content of its claims, and the content of the utility model content, specific implementation and the content of the attached drawings of the specification are used to explain the claims.

[0047] Within the technical concept of the utility model, the specific embodiments of the utility model can be modified in several ways. These modified specific embodiments should also be considered within the protection scope of the utility model.

Claims

1. A replaceable vertical water temperature observation device for a power station intake, characterized in that, It includes a temperature measuring component (1), a conveying mechanism (2), and a guiding mechanism (3); The temperature measuring component (1) includes a plurality of water temperature probes (11) and a data transmission line (12). The plurality of water temperature probes (11) are evenly arranged along the length of the data transmission line (12), and the water temperature probes (11) are connected to the data transmission line (12). The transmission mechanism (2) includes a first drive mechanism (21), a second drive mechanism (22) and a steel cable (23). The two ends of the steel cable (23) are fixed on the first drive mechanism (21) and the second drive mechanism (22) respectively, for driving the steel cable (23) to rise and fall. The guiding mechanism (3) is located below the transmission mechanism (2); the guiding mechanism (3) includes a first guiding tube (31) and a second guiding tube (32) arranged in parallel, a steel cable (23) passes through the first guiding tube (31) and the second guiding tube (32) in sequence, and a data transmission line (12) connected to a water temperature probe (11) is fixed on the steel cable (23) inside the first guiding tube (31) or the second guiding tube (32).

2. The replaceable power station inlet vertical water temperature observation device according to claim 1, characterized in that, The water temperature probe (11) is a temperature sensor, and the distance between two adjacent water temperature probes (11) is 1m to 3m.

3. The replaceable power station inlet vertical water temperature observation device according to claim 1, characterized in that, The first drive mechanism (21) and the second drive mechanism (22) are both winches.

4. The replaceable power station inlet vertical water temperature observation device according to claim 1, characterized in that, The first guide tube (31) and the second guide tube (32) have the same structure, and their axes are both perpendicular to the horizontal plane; a number of through holes (33) are evenly opened on the tube walls of the first guide tube (31) and the second guide tube (32).

5. The replaceable power station intake vertical water temperature observation device according to claim 4, characterized in that, Two rows of through holes (33) are opened along the length of the first guide tube (31) / second guide tube (32), and the positions of the two rows of through holes (33) are symmetrically arranged along the axis of the first guide tube (31) / second guide tube (32).

6. The replaceable power station inlet vertical water temperature observation device according to claim 5, characterized in that, The diameter of the through hole (33) is 18mm to 22mm; along the length direction of the first guide tube (31) and the second guide tube (32), the distance between two adjacent through holes (33) is 10cm to 20cm.

7. The replaceable power station intake vertical water temperature observation device according to claim 1, characterized in that, The outer diameter of the first guide tube (31) and the second guide tube (32) are both 150mm to 200mm, and the wall thickness is both 5mm to 15mm.

8. The replaceable vertical water temperature observation device for power plant inlet according to any one of claims 1-7, characterized in that, The guiding mechanism (3) also includes a fixed pulley (34), which is located below the first guide tube (31) and the second guide tube (32).

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