A device for measuring average water temperature of tailrace of hydroelectric generating set

Abstract

The utility model relates to the technical field of hydroelectric generating set monitoring, especially relates to a hydroelectric generating set tailrace average water temperature measuring device, and floating support includes: main rod, two vice poles are along the length direction of main rod and are slidably installed, and multidimensional temperature sensing array is installed along the length direction of two vice poles, buoyancy cavity is installed on the side wall of main rod through detachable mechanism, and the buoyancy cavity is provided with buoyancy adjusting mechanism, locking mechanism is installed at the joint of main rod and vice pole, and guide mechanism is set up on main rod, through the utility model, water temperature measurement is accurate, and the use adaptability is strong.

Description

Technical Field

[0001] This utility model relates to the field of hydropower unit monitoring technology, and in particular to a device for measuring the average water temperature of the tailrace channel of a hydropower unit. Background Technology

[0002] In the field of hydropower, the water temperature in the tailrace of a hydropower unit is a key monitoring parameter. Its accurate measurement is of great significance for assessing the operating efficiency of the turbine, optimizing the unit's performance, and ensuring the safe and stable operation of the power station.

[0003] Existing technologies for calculating average water temperature typically employ a highly simplified approach: a simple arithmetic average of limited single-point temperature measurements is used as the average water temperature for the entire cross-section. This method ignores the spatial heterogeneity of temperature distribution within the tailrace channel cross-section and fails to consider the varying weights of different water depths and flow velocities in contributing to overall heat, such as high-speed flow zones, transition zones, and slow-flow zones. This invention addresses this core technical challenge by introducing a temperature field reconstruction algorithm based on a weighted average model optimized from cross-sectional flow measurement. This algorithm operates within the device's edge computing unit, integrating spatial temperature data collected by a multi-dimensional temperature sensor array distributed along the floating support. Through weighted calculations, it accurately reconstructs the cross-sectional temperature field, outputting a more accurate average water temperature that reflects the overall thermal state and reducing errors in turbine efficiency calculations. Utility Model Content

[0004] This invention provides a device for measuring the average water temperature of the tailrace channel of a hydroelectric generator, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A device for measuring the average water temperature in the tailrace channel of a hydroelectric generator, comprising a floating support: The main shaft is a hollow carbon fiber shaft; Two auxiliary rods are slidably installed along the length of the main rod to adjust the overall span of the floating support and adapt to tailrace channels of different widths. A multi-dimensional temperature sensor array is installed along the length of the two auxiliary rods. The buoyancy cavity is installed on the side wall of the main rod via a detachable mechanism, and a buoyancy adjustment mechanism is provided on the buoyancy cavity; The locking mechanism is installed at the connection between the main rod and the auxiliary rod; The guide mechanism is located on the main rod.

[0006] Furthermore, the locking mechanisms include: The locating pin connects to the inner hole opened on the side wall of the auxiliary rod; A connecting spring is sleeved on the outside of the positioning pin. One end of the connecting spring abuts against the limiting step of the positioning pin, and the other end abuts against the inner wall of the auxiliary rod.

[0007] Furthermore, the buoyancy adjustment mechanism includes: Airbags, built into the buoyancy cavity; The trachea connects to the air sac at one end and extends to the outside of the buoyancy chamber at the other end. The air pressure regulating valve is installed at the end of the air tube located outside the buoyancy chamber. The air pressure regulating valve is used to adjust the inflation volume of the airbag and change the overall buoyancy of the buoyancy chamber.

[0008] Furthermore, a buffer spring is installed in the mounting groove at the free end of the auxiliary rod, and an anti-collision pad is fixedly installed at the other end of the buffer spring. The anti-collision pad is made of elastic rubber and is used to prevent the floating support from colliding and being damaged by the tailrace channel sidewall when it extends, retracts or shakes.

[0009] Furthermore, the shape of the anti-collision pad is adapted to the free end of the sub-bar.

[0010] Furthermore, the detachable mechanism includes: The connecting seat is a semi-circular clamp structure. Its inner wall fits against the outer wall of the main rod, and its outer wall is fixedly connected to the buoyancy cavity. Flange ears are provided at both ends of the connecting seat. Fasteners, which pass through the inner holes of the flange ears on both sides and are used to fix the main rod, facilitate the maintenance and replacement of the buoyancy cavity.

[0011] Furthermore, the guidance mechanism includes: The fixing base is fixed to the concrete foundation on the bank of the tailrace channel; The guide rod is fixedly connected to the fixed base at its lower end, and the guide rod is set vertically. The guide sleeve is fitted on the outside of the guide rod and is fixedly connected to the main rod. The guide sleeve slides along the guide rod to limit the horizontal displacement of the telescopic floating bracket and ensure the depth accuracy of the sensor.

[0012] Furthermore, a pressure relief channel is provided on the top side wall of the buoyancy cavity. One end of the pressure relief channel is connected to the inside of the buoyancy cavity, and the other end is connected to the pressure relief valve.

[0013] The following technical effects can be achieved through the technical solution of this utility model: The main rod combines lightweight design with structural strength, while the auxiliary rod slides along the main rod for adjustment. Combined with a locking mechanism, the span can be quickly fixed, adapting to tailrace channels of different widths and overcoming the limitations of traditional support span fixing. The buoyancy chamber is detachable for easy maintenance and replacement. Its buoyancy adjustment mechanism adjusts buoyancy according to water level fluctuations to ensure the stability of the support's lifting and lowering. Combined with a guide mechanism, it limits the horizontal deviation of the support, ensuring the depth accuracy of the sensor and helping to improve the accuracy of water temperature measurement. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the main structure of a device for measuring the average water temperature of the tailrace channel of a hydroelectric generator unit; Figure 2 A schematic diagram of the isometric structure of an average water temperature measuring device for the tailrace channel of a hydroelectric generator unit; Figure 3 This is a partially enlarged schematic diagram of an average water temperature measuring device for the tailrace channel of a hydroelectric generator. Figure 4 A schematic diagram of the buoyancy cavity structure of a hydroelectric generator tailrace channel average water temperature measuring device; The following are labels in the attached diagram: 1. Main rod; 2. Guide mechanism; 21. Fixed seat; 22. Guide rod; 23. Guide sleeve; 3. Secondary rod; 4. Buffer spring; 5. Anti-collision pad; 6. Buoyancy cavity; 7. Detachable mechanism; 71. Connecting seat; 72. Flange lug; 73. Fastener; 8. Buoyancy adjustment mechanism; 81. Airbag; 82. Air pipe; 83. Air pressure regulating valve; 9. Locking mechanism; 91. Positioning pin; 92. Connecting spring; 10. Pressure relief valve. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0018] This application provides a device for measuring the average water temperature in the tailrace channel of a hydropower unit, the floating support comprising: Main rod 1, equipped with reinforcing mechanism 2, is a hollow carbon fiber rod; Two auxiliary rods 3 are slidably installed along the length of the main rod 1 to adjust the overall span of the floating support and adapt to tailwater channels of different widths. A multi-dimensional temperature sensor array is installed along the length of the two auxiliary rods 3. The buoyancy cavity 6 is installed on the side wall of the main rod 1 via a detachable mechanism 7, and a buoyancy adjustment mechanism 8 is provided on the buoyancy cavity 6; Locking mechanism 9 is installed at the connection between main rod 1 and auxiliary rod 3; Guide mechanism 2 is mounted on main rod 1; Multiple sets of floating supports are set up, and these multiple sets of floating supports cover multiple depth measurement points below the water surface in layers; Through the technical solution of this utility model, the main rod 1 combines lightweight and structural strength, the auxiliary rod 3 slides and adjusts along the main rod 1, and the span is quickly fixed by the locking mechanism 9, which is suitable for tailrace channels of different widths. This solves the limitation of the traditional support span fixing. The buoyancy cavity 6 is easy to maintain and replace later through the detachable mechanism 7. Its buoyancy adjustment mechanism 8 adjusts the buoyancy according to the water level fluctuation to ensure the stability of the support lifting and lowering. It is equipped with a guide mechanism 2 to limit the horizontal deviation of the support. Multiple measurement points are set to comprehensively capture the temperature distribution of the tailrace channel cross section, ensuring the depth accuracy of the sensor and helping to improve the accuracy of water temperature measurement.

[0019] During use, the locking mechanism 9 includes: The locating pin 91 is connected to the inner hole opened on the side wall of the auxiliary rod 3; A connecting spring 92 is sleeved on the outside of the positioning pin 91. One end of the connecting spring 92 abuts against the limiting step of the positioning pin 91, and the other end abuts against the inner wall of the auxiliary rod 3. Through the technical solution of this utility model, the positioning pin 91 cooperates with the inner hole of the side wall of the auxiliary rod 3 to provide positioning support for the auxiliary rod 3 to be fixed in the span after sliding along the main rod 1. With the help of the connecting spring 92 sleeved on the outside of the positioning pin 91, one end of the connecting spring 92 abuts against the limiting step of the positioning pin 91 and the other end abuts against the inner wall of the auxiliary rod 3, continuously outputting elastic pre-tightening force, so that the positioning pin 91 automatically engages with the corresponding positioning structure of the main rod 1, realizing the rapid locking of the auxiliary rod 3 and the main rod 1. At the same time, the elastic force of the connecting spring 92 can prevent the positioning pin 91 from loosening, prevent the auxiliary rod 3 from shifting due to water flow impact, ensure the stability of the floating bracket span, and thus ensure the accurate installation position of the sensor, providing support for the accuracy of tailrace water temperature measurement.

[0020] In the above embodiment, the buoyancy adjustment mechanism 8 includes: Airbag 81 is built into the buoyancy cavity 6; The trachea 82 is connected at one end to the air sac 81 and at the other end extends to the outside of the buoyancy cavity 6. The air pressure regulating valve 83 is installed at one end of the air tube 82 located outside the buoyancy cavity 6. The air pressure regulating valve 83 is used to adjust the inflation amount of the airbag 81 and change the overall buoyancy of the buoyancy cavity 6. Through the technical solution of this utility model, the airbag 81 provides a variable carrier for buoyancy adjustment. One end of the air tube 82 is connected to the airbag 81 and the other end extends to the outside of the buoyancy cavity 6, forming a stable gas transmission channel. The air pressure regulating valve 83 installed at one end of the air tube 82 controls the inflation amount of the airbag 81, thereby flexibly changing the overall buoyancy of the buoyancy cavity 6. This structure dynamically adjusts the buoyancy according to the different water level fluctuations in the tailrace channel.

[0021] As a preferred embodiment of the above, a buffer spring 4 is installed in the mounting groove at the free end of the auxiliary rod 3, and an anti-collision pad 5 is fixedly installed at the other end of the buffer spring 4. The anti-collision pad 5 is made of elastic rubber material and its shape is adapted to the free end of the auxiliary rod 3 to prevent the floating support from being damaged by collision with the side wall of the tailrace channel when it extends, retracts or shakes. Through the technical solution of this utility model, the buffer spring 4 at the free end of the auxiliary rod 3 and the anti-collision pad 5 made of elastic rubber buffer the collision force between the floating support and the side wall of the tailrace channel when the support extends, retracts or shakes, thus protecting the support components.

[0022] In the above embodiments, the detachable mechanism 7 includes: The connecting seat 71 is a semi-circular clamp structure. Its inner wall is fitted with the outer wall of the main rod 1, and its outer wall is fixedly connected to the buoyancy cavity 6. The connecting seat 71 has flange ears 72 at both ends. Fasteners 73 are inserted through the inner holes of the flange ears 72 on both sides and fixed to the main rod 1, which facilitates the maintenance and replacement of the buoyancy cavity 6. Through the technical solution of this utility model, the connecting seat 71 of the semi-circular clamp structure realizes the stable assembly of the buoyancy cavity 6 and the main rod 1, avoiding the loosening of the connection between the two due to water flow impact. The flange ears 72 at both ends of the connecting seat 71 cooperate with the fasteners 73 that pass through their inner holes, so the buoyancy cavity 6 can be disassembled and assembled without disassembling the entire floating support. The operation is convenient and reduces the difficulty and time cost of later maintenance and replacement of the buoyancy cavity 6.

[0023] As a preferred embodiment of the above, the guide mechanism 2 includes: Fixing base 21 is fixed to the concrete foundation on the bank of the tailrace channel; Guide rod 22, the lower end of which is fixedly connected to fixed base 21, and guide rod 22 is set vertically; Guide sleeve 23 is sleeved on the outside of guide rod 22. Guide sleeve 23 is fixedly connected to main rod 1. Guide sleeve 23 slides along guide rod 22 to limit the horizontal displacement of telescopic floating bracket and ensure sensor depth accuracy. With the technical solution of this utility model, the fixed base 21 is fixed to the concrete foundation on the bank of the tailrace channel, the lower end of the vertically set guide rod 22 is connected to the fixed base 21 to form a vertical guide path, and the guide sleeve 23, which is sleeved on the outside of the guide rod 22, is fixedly connected to the main rod 1. It slides smoothly along the guide rod 22 with the floating support, without hindering the lifting and lowering action of the support driven by the buoyancy adjustment mechanism 8, limiting the horizontal displacement of the support, and preventing lateral swaying caused by water turbulence or vortex.

[0024] During use, a pressure relief channel is provided on the top side wall of the buoyancy cavity 6. One end of the pressure relief channel is connected to the inside of the buoyancy cavity 6, and the other end is connected to the pressure relief valve 10. Through the technical solution of this utility model, the pressure relief channel is connected to the inside of the buoyancy cavity 6 at one end and to the pressure relief valve 10 at the other end, thus constructing a safe release path when the pressure is abnormal. When the ambient temperature of the tailrace channel changes, causing the gas inside the buoyancy cavity 6 to expand and contract due to heat, or when the air bladder 81 leaks and causes internal pressure fluctuations, the pressure relief valve 10 can automatically open to relieve pressure, preventing the buoyancy cavity 6 from being cracked due to excessive pressure or losing effective buoyancy support due to excessive pressure, thus protecting its structural integrity and normal working ability.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the average water temperature of the tailrace channel of a hydroelectric generator, characterized in that, The floating support includes: Main rod (1); Two auxiliary rods (3) are slidably installed along the length direction of the main rod (1), and a multi-dimensional temperature sensing array is installed along the length direction of the two auxiliary rods (3); The buoyancy cavity (6) is installed on the side wall of the main rod (1) via a detachable mechanism (7), and the buoyancy cavity (6) is provided with a buoyancy adjustment mechanism (8). A locking mechanism (9) is installed at the connection between the main rod (1) and the auxiliary rod (3); A guide mechanism (2) is mounted on the main rod (1); Multiple sets of floating supports are set up, and these sets of floating supports are layered to cover multiple depth measurement points below the water surface.

2. The average water temperature measuring device for the tailrace channel of a hydroelectric generator unit according to claim 1, characterized in that, The locking mechanism (9) includes: The positioning pin (91) is connected to the inner hole opened on the side wall of the auxiliary rod (3); A connecting spring (92) is sleeved on the outside of the positioning pin (91). One end of the connecting spring (92) abuts against the limiting step of the positioning pin (91), and the other end abuts against the inner wall of the auxiliary rod (3).

3. The average water temperature measuring device for the tailrace channel of a hydroelectric generator unit according to claim 1, characterized in that, The buoyancy adjustment mechanism (8) includes: An airbag (81) is built inside the buoyancy cavity (6); The trachea (82) is connected at one end to the airbag (81) and at the other end extends to the outside of the buoyancy cavity (6); A pressure regulating valve (83) is installed at one end of the air pipe (82) outside the buoyancy cavity (6). The pressure regulating valve (83) is used to adjust the inflation amount of the air bag (81).

4. The average water temperature measuring device for the tailrace channel of a hydroelectric generator unit according to claim 1, characterized in that, A buffer spring (4) is installed in the mounting groove at the free end of the auxiliary rod (3), and an anti-collision pad (5) is fixedly installed at the other end of the buffer spring (4).

5. The average water temperature measuring device for the tailrace channel of a hydroelectric generator unit according to claim 4, characterized in that, The shape of the anti-collision pad (5) is adapted to the free end of the sub-rod (3).

6. The average water temperature measuring device for the tailrace channel of a hydroelectric generator according to claim 1, characterized in that, The detachable mechanism (7) includes: The inner wall of the connecting seat (71) is fitted with the outer wall of the main rod (1), and the outer wall is fixedly connected to the buoyancy cavity (6). The connecting seat (71) has flange ears (72) at both ends. Fasteners (73) are inserted through the inner holes of the flange ears (72) on both sides and fixed to the main rod (1).

7. The average water temperature measuring device for the tailrace channel of a hydroelectric generator according to claim 1, characterized in that, The guiding mechanism (2) includes: The fixing seat (21) is fixed to the concrete foundation on the bank of the tailrace channel; The guide rod (22) is fixedly connected at its lower end to the fixed base (21), and the guide rod (22) is set vertically. A guide sleeve (23) is fitted on the outside of the guide rod (22). The guide sleeve (23) is fixedly connected to the main rod (1). The guide sleeve (23) slides along the guide rod (22).

8. The average water temperature measuring device for the tailrace channel of a hydroelectric generator according to claim 1, characterized in that, The top side wall of the buoyancy cavity (6) is provided with a pressure relief channel. One end of the pressure relief channel is connected to the inside of the buoyancy cavity (6), and the other end is connected to the pressure relief valve (10).

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