Environment temperature measuring device with self-adaptive adjusting function

Abstract

The invention discloses an environment temperature measuring device with a self-adaptive adjusting function, and relates to the technical field of temperature measurement, the environment temperature measuring device comprises a tank body, one end of the tank body is open, and the open end of the tank body faces cooling water; the partition plate is arranged in the tank body, and the interior of the tank body is divided into an upper cavity and a lower cavity by the partition plate; the temperature measuring unit is mounted in the middle of the partition plate, and the detection end of the temperature measuring unit faces the open end of the tank body; the open end of the tank body faces downwards and is immersed in cooling water in the vertical direction, the lower cavity is filled with air, and the cooling water is prevented from making contact with the temperature measuring unit. The temperature measuring unit is installed on the inner side of the tank body, when the temperature is detected, the bottom opening of the tank body faces the water surface, and then air is always kept in the tank body in the process that cooling water enters the tank body, so that the temperature measuring unit is prevented from making direct contact with the cooling water, and surface scaling caused by the fact that the temperature measuring unit makes contact with the water is avoided; and the temperature detection precision of the temperature measurement unit is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature measurement, and in particular to an environmental temperature measurement device with an adaptive adjustment function. Background Art

[0002] In coal-fired power plants, nuclear power plants, and combined cycle gas turbine units, it is necessary to continuously discharge the heat of the low-temperature heat source through a cooling medium to maintain the cycle closure. As the core heat transfer carrier of the power plant energy conversion system, the cooling water undertakes the dual functions of ensuring the thermal cycle efficiency and the safe operation of the equipment; since the cold-end parameters of the steam turbine exhaust condensation process are highly sensitive to temperature changes, the cooling water temperature directly affects the Rankine cycle efficiency - numerical fluctuations will lead to significant changes in the steam turbine back pressure and standard coal consumption; therefore, establishing an accurate cooling water temperature monitoring system has become a key control link for optimizing the operation efficiency of the unit.

[0003] In the power plant cooling water temperature detection system, the thermocouple is the core sensing element, and the measurement accuracy and stability of the thermocouple directly affect the control efficiency of the thermal system. Due to the significant thermal stratification phenomenon in the cooling water circulation system, the water temperature difference at different depths can reach the key interval of the operating threshold, so it is necessary to dynamically adjust the depth of the thermocouple immersed in the cooling medium to accurately capture the actual thermodynamic state of the cooling medium; however, in actual operation, the calcium and magnesium ions and dissolved oxygen contained in the cooling water will cause multiple scaling phenomena, affecting the detection accuracy of the thermocouple. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is: after the existing temperature measurement device is soaked in water for a long time and scale forms on the surface, the problem of affecting the temperature detection accuracy.

[0005] The above technical problem is solved by the following technical solutions: The present invention provides an environmental temperature measurement device with an adaptive adjustment function, including a tank body with one end open, and the open end of the tank body faces the cooling water; A partition board is arranged inside the tank body, and the partition board divides the interior of the tank body into an upper chamber and a lower chamber; A temperature measurement unit is installed at the central position of the partition board, and the detection end of the temperature measurement unit faces the open end of the tank body; A first air hole is opened on the side wall of the upper chamber; A second air hole is opened on the side wall of the lower chamber; The upper chamber and the lower chamber are connected and communicated through a connecting pipe; One end of the connecting pipe is connected to the first air hole, and the other end is connected to the second air hole; The upper chamber and the lower chamber maintain pressure balance through the connecting pipe; The open end of the tank body faces downward and is immersed in the cooling water in the vertical direction. The inside of the lower chamber is filled with air to prevent the cooling water from contacting the temperature measuring unit.

[0006] In a preferred embodiment of the ambient temperature measuring device with the self-adaptive adjustment function according to the present invention: An installation plate is provided inside the upper chamber, and a telescopic rod is installed at one end of the installation plate facing the opening of the tank body; The bottom of the telescopic rod is connected to a partition plate.

[0007] In a preferred embodiment of the ambient temperature measuring device with the self-adaptive adjustment function according to the present invention: It further includes, A lifting unit, including a screw rod, a threaded sleeve provided at the central position of the screw rod, a driving member provided outside the threaded sleeve, a coupling provided at the end of the screw rod, and a plug connected to the coupling; The plug is connected to the tank body.

[0008] In a preferred embodiment of the ambient temperature measuring device with the self-adaptive adjustment function according to the present invention: First pressure sensors and second pressure sensors are respectively provided on both sides of the end face of the partition plate; The first pressure sensor is used to monitor the pressure inside the upper chamber; The second pressure sensor is used to monitor the pressure inside the lower chamber.

[0009] In a preferred embodiment of the ambient temperature measuring device with the self-adaptive adjustment function according to the present invention: The liquid level of the cooling water inside the lower chamber rises as the tank body is located at the depth of the cooling water; The cooling water inside the lower chamber can block the second air hole, thereby isolating the connecting pipe; An external gas supply unit of the upper chamber fills the inside of the upper chamber with gas; When there is a pressure difference between the upper chamber and the lower chamber, gas is replenished inside the upper chamber to increase its internal pressure, thereby moving the liquid level of the cooling water inside the lower chamber below the second air hole.

[0010] In a preferred embodiment of the ambient temperature measuring device with the self-adaptive adjustment function according to the present invention: A filter screen is provided at the bottom of the lower chamber.

[0011] The beneficial effect of the present invention is that by installing the temperature measuring unit inside the tank body, and when detecting the temperature, the bottom opening of the tank body faces the water surface, and then during the process of the tank body entering the cooling water, there is always air in the tank body, so as to prevent the temperature measuring unit from directly contacting the cooling water, avoid scaling on the surface of the temperature measuring unit, and ensure the accuracy of temperature detection. Description of the Drawings

[0012] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0013] Figure 1 shows a schematic diagram of the overall structure of a temperature measurement device with an adaptive adjustment function; Figure 2 shows a top view of a temperature measurement device with an adaptive adjustment function; Figure 3 shows Figure 2 a cross-sectional view taken along line A-A in Figure 4 shows a bottom view of the tank body; Figure 5 shows Figure 4 a cross-sectional view taken along line B-B in Figure 6 shows a schematic diagram of the three-dimensional structure of the tank body; Figure 7 shows an exploded structure diagram of the tank body and the partition board; Figure 8 shows a schematic diagram of the air flow inside the tank body.

[0014] In the figure: 11, tank body; 111, upper chamber; 1111, mounting plate; 1112, first air hole; 112, lower chamber; 1122, second air hole; 1123, filter screen; 12, partition board; 13, temperature measurement unit; 14, telescopic rod; 15, connecting pipe; 2, lifting unit; 21, screw rod; 22, threaded sleeve; 23, driving member; 24, coupling; 25, plug; 31, first pressure sensor; 32, second pressure sensor. Detailed implementation manners

[0015] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the detailed implementation manners and the accompanying drawings.

[0016] The terms used in the present invention are those general terms that are currently widely used in the art in consideration of the functions of the present invention. However, these terms may change according to the intentions of those of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but based on the meanings of the terms and the overall description of the present invention.

[0017] Referring to Figures 1 to 3, this embodiment provides an environmental temperature measuring device with an adaptive adjustment function, including a tank body 11, and one end of the tank body 11 is open, and the open end of the tank body 11 faces the cooling water; the tank body 11 mainly ensures that there is a certain amount of air inside the tank body 11, so that when the tank body 11 is immersed in the cooling water, the cooling water will not directly enter the inside of the tank body 11, and the material of the tank body 11 is preferably stainless steel, effectively avoiding damage to the side wall of the tank body 11 due to corrosion.

[0018] A partition plate 12 is arranged inside the tank body 11. The partition plate 12 divides the inside of the tank body 11 into an upper chamber 111 and a lower chamber 112. The partition plate 12 is composed of a middle support part and a sealing part arranged at the edge position; the sealing part is preferably rubber, and the sealing part abuts against the inner wall of the tank body 11, and thus the tank body 11 can be divided into the upper chamber 111 and the lower chamber 112 by the partition plate 12.

[0019] Furthermore, in order to facilitate the installation of the partition plate 12 inside the tank body 11, the tank body 11 is combined into a body structure by means of bolt connection; and a sealing gasket is arranged at the bolt connection of the tank body 11 to ensure the sealing performance inside the entire tank body 11.

[0020] The temperature measuring unit 13 is installed at the central position of the partition plate 12, and the detection end of the temperature measuring unit 13 faces the open end of the tank body 11; the temperature measuring unit 13 penetrates through the middle support part of the partition plate 12, and the connection part between the temperature measuring unit 13 and the partition plate 12 is sealed with sealant to ensure that the upper chamber 111 and the lower chamber 112 are completely separated inside.

[0021] And the temperature measuring unit 13 is also connected with a wire. The wire is located inside the tank body 11 and ensures that the wire has enough length to adapt to the position movement of the temperature measuring unit 13 inside the tank body 11; the wire connecting the temperature measuring unit 13 penetrates through the tank body 11 and is connected with the display screen to ensure that the detection data can be seen by the staff in real time, and the position where the wire penetrates through the tank body 11 is also sealed.

[0022] It should be noted that in this embodiment, the temperature measuring unit 13 is preferably an infrared thermometer, which measures the temperature of the cooling water by a non-contact method with water, effectively avoiding the surface scaling of the temperature measuring unit 13 due to contact with water and affecting the accuracy of temperature measurement.

[0023] During the process of detecting the cooling water temperature, the staff drives the tank body 11 with its opening facing downwards into the cooling water through a pneumatic telescopic rod. When the opening at the bottom of the tank body 11 contacts the water surface of the cooling water, since there is air inside the tank body 11, the cooling water cannot completely enter the tank body 11, thus ensuring that there is a certain space inside the tank body 11 separated from the cooling water; furthermore, the temperature measuring unit 13 will not contact the cooling water, and then the surface temperature of the cooling water is detected by the temperature measuring unit 13 and recorded; then the tank body 11 is continuously driven to move downwards; so that the tank body 11 enters a deeper position in the cooling water. During the descent of the tank body 11, the water pressure continuously increases. At this time, the air pressure inside the tank body 11 is less than the water pressure, and a part of the cooling water enters the tank body 11 along the opening at the bottom of the tank body 11; when the cooling water enters the tank body 11, it compresses the air inside the lower chamber 112, making the pressure inside the lower chamber 112 greater than the air inside the upper chamber 111, thus causing the partition plate 12 to move towards the closed end of the tank body 11; when the partition plate 12 moves, it will also drive the temperature measuring unit 13 to move, preventing the temperature measuring unit 13 from contacting the cooling water.

[0024] Referring to Figures 4 to 7 , as an alternative embodiment, an installation plate 1111 is arranged inside the upper chamber 111, and a telescopic rod 14 is installed on the installation plate 1111 facing the opening end of the tank body 11; the bottom of the telescopic rod 14 is connected to the partition plate 12.

[0025] In this embodiment, in the normal state, in order to prevent the partition plate 12 from contacting the bottom of the tank body 11 under the action of gravity and causing wear of the detection lens of the temperature measuring unit 13, the telescopic rod 14 is connected to the partition plate 12, effectively restricting the movement trajectory of the partition plate 12, and further ensuring that the partition plate 12 will not contact the inner wall of the bottom of the tank body 11. In this embodiment, the bottom of the tank body 11 is the opening end of the tank body 11.

[0026] Furthermore, in order to prevent a pressure difference between the upper chamber 111 and the lower chamber 112 from causing the partition plate 12 to move unstably; it is necessary to connect the upper chamber 111 and the lower chamber 112; a first air hole 1112 is opened on the side wall of the upper chamber 111; a second air hole 1122 is opened on the side wall of the lower chamber 112; the upper chamber 111 and the lower chamber 112 are connected through a connecting pipe 15; one end of the connecting pipe 15 is connected to the first air hole 1112, and the end of the connecting pipe 15 far from the first air hole 1112 is connected to the second air hole 1122; the upper chamber 111 and the lower chamber 112 maintain pressure balance through the connecting pipe 15.

[0027] It should be noted that a first air hole 1112 is provided on the side wall of the upper chamber 111, and a second air hole 1122 is provided on the side wall of the lower chamber 112, and the two groups of air holes are connected through a connecting pipe 15; when the upper chamber 111 and the lower chamber 112 are in communication, when cooling water enters the lower chamber 112 and causes the internal space of the lower chamber 112 to decrease and the pressure to increase, at this time, the partition 12 moves towards the upper chamber 111 and compresses the air inside the upper chamber 111, so that the air inside the upper chamber 111 enters the inside of the lower chamber 112 to maintain the balance between the inside of the tank body 11 and the water pressure; thus effectively avoiding the vibration caused by the pressure difference and affecting the measurement accuracy of the temperature measuring device.

[0028] Furthermore, during the movement of the partition 12, it can drive the temperature measuring unit 13 to move. As the partition 12 moves towards the upper chamber 111, the temperature measuring unit 13 is always kept not in contact with the cooling water during the movement.

[0029] Referring to Figures 1 to 3 , in an embodiment provided by the present invention, it includes a lifting unit 2 for driving the tank body 11 to move along the vertical direction; the lifting unit 2 includes a screw rod 21, and the length of the screw rod 21 meets the requirements for measuring the temperature of the cooling water at different depths, that is, the screw rod 21 can drive the tank body 11 to move from the surface of the cooling water to a deeper position at the bottom of the cooling water; a thread sleeve 22 is arranged at the middle position of the screw rod 21, and the thread sleeve 22 cooperates with the screw rod 21, and by rotating the thread sleeve 22, the screw rod 21 can be driven to move along the vertical direction; a driving member 23 is arranged outside the thread sleeve 22, and the driving member 23 can be a worm and gear drive. The thread sleeve 22 is sleeved inside the worm gear, and then the motor is used to drive the worm to rotate, thereby driving the thread sleeve 22 arranged inside the worm gear to rotate; by rotating the thread sleeve 22, the screw rod 21 is further driven to move along the vertical direction.

[0030] In order to ensure that the device can be located on the water surface of the cooling water, a floating platform is arranged on the water surface of the cooling water, and the thread sleeve 22 is installed on the surface of the floating platform through bolts; a bearing is arranged outside the thread sleeve 22, and the bearing is installed inside the bearing bracket, and the bearing bracket is fixedly connected to the floating platform.

[0031] Furthermore, a coupling 24 is arranged at the end of the screw rod 21 close to the tank body 11, and the coupling 24 is connected to the plug 25; the plug 25 can move synchronously with the coupling 24, and the plug 25 is connected and fixed to the tank body 11 through bolts. When the screw rod 21 moves along the vertical direction, the tank body 11 can be driven to move synchronously, thereby changing the position of the tank body 11 at different depths of the cooling water; ensuring the accuracy of the cooling water temperature detection.

[0032] Referring to Figure 7, in some embodiments, it includes that a first pressure sensor 31 and a second pressure sensor 32 are respectively arranged on both sides of the end face of the partition plate 12; the first pressure sensor 31 is used to monitor the pressure inside the upper chamber 111; the second pressure sensor 32 is used to monitor the pressure inside the lower chamber 112.

[0033] To further facilitate the staff to understand the pressures inside the upper chamber 111 and the lower chamber 112, a first pressure sensor 31 and a second pressure sensor 32 are respectively installed on both end faces of the partition plate 12; through the pressure situation displayed by the first pressure sensor 31, the cooling water pressure can also be effectively adjusted in reverse.

[0034] It should be noted that the first pressure sensor 31 and the second pressure sensor 32 are of the same model, preferably fiber optic pressure sensors.

[0035] Furthermore, as the depth of the tank body 11 decreases continuously, the pressure of the cooling water gradually increases, resulting in the gradual increase of the liquid level height inside the lower chamber 112. The cooling water liquid level inside the lower chamber 112 increases as the depth of the tank body 11 in the cooling water increases; when the tank body 11 descends to a certain height, the height of the cooling water entering the lower chamber 112 is sufficient to block the second air hole 1122, so that the air flow channels between the upper chamber 111 and the lower chamber 112 are disconnected.

[0036] At this time, the pressures inside the upper chamber 111 and the lower chamber 112 are different. The pressure difference between the upper chamber 111 and the lower chamber 112 is judged through the pressure signals transmitted by the first pressure sensor 31 and the second pressure sensor 32; then the pressure difference is fed back to the control system, and the control system controls the external air supply unit of the upper chamber 111 to charge high-pressure gas into the upper chamber 111. It should be noted that the air supply unit is preferably an air pump.

[0037] High-pressure gas is filled into the upper chamber 111, so that the pressure inside the upper chamber 111 is greater than the cooling water pressure, thereby causing the partition plate 12 to move towards the lower chamber 112; and then the cooling water located inside the connecting pipe 15 is discharged; thus ensuring that the upper chamber 111 and the lower chamber 112 return to the pressure balance state.

[0038] When the internal pressures of the upper chamber 111 and the lower chamber 112 are in the balanced state, the pressure difference between the upper chamber 111 and the lower chamber 112 disappears, and the two groups of pressure sensors cannot detect the pressure difference signal. Furthermore, the control system closes the air pump and no longer pumps high-pressure gas into the upper chamber 111.

[0039] Furthermore, a filter screen 1123 is arranged at the bottom of the lower chamber 112. By arranging the filter screen 1123, impurities in the cooling water can be effectively isolated, avoiding impurities from entering the inside of the tank body 11 and adhering to the inner wall of the tank body 11, which causes inconvenience during the movement of the partition plate 12.

[0040] It should be noted that the aperture of the internal filter screen 1123 of the filter screen is mainly for filtering larger gravel impurities. When the tank body 11 is inverted into the water, a water covering film cannot be formed between its aperture and the water; thus ensuring that the cooling water can pass through the filter screen 1123 and enter the inside of the tank body 11.

[0041] Finally, it should be pointed out that the methods and devices described in detail above are only examples, and those skilled in the art can modify these examples in different ways as long as they do not depart from the scope of the present invention.

[0042] Importantly, the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An environmental temperature measuring device with an adaptive adjustment function, characterized in that: including, a tank body (11), with one end of the tank body (11) open, and the open end of the tank body (11) facing the cooling water; a partition plate (12), arranged inside the tank body (11), and the partition plate (12) divides the interior of the tank body (11) into an upper chamber (111) and a lower chamber (112); a temperature measuring unit (13), installed at the central position of the partition plate (12), and the detection end of the temperature measuring unit (13) faces the open end of the tank body (11); a first air hole (1112) is formed on the side wall of the upper chamber (111); a second air hole (1122) is formed on the side wall of the lower chamber (112); the upper chamber (111) is communicated with the lower chamber (112) through a connecting pipe (15); one end of the connecting pipe (15) is connected to the first air hole (1112), and the other end is connected to the second air hole (1122); the upper chamber (111) and the lower chamber (112) maintain pressure balance through the connecting pipe (15); the open end of the tank body (11) faces downward and is immersed in the cooling water in the vertical direction, and the interior of the lower chamber (112) is filled with air to prevent the cooling water from contacting the temperature measuring unit (13).

2. The environmental temperature measuring device with an adaptive adjustment function according to claim 1, wherein: an installation plate (1111) is arranged inside the upper chamber (111), and a telescopic rod (14) is installed at one end of the installation plate (1111) facing the opening of the tank body (11); the bottom of the telescopic rod (14) is connected to the partition plate (12).

3. An environmental temperature measuring device with an adaptive adjustment function according to claim 2, characterized in that: further including, a lifting unit (2), including a screw rod (21), a thread sleeve (22) arranged at the central position of the screw rod (21), a driving member (23) arranged outside the thread sleeve (22), a coupling (24) arranged at the end of the screw rod (21), and a plug (25) connected to the coupling (24); the plug (25) is connected to the tank body (11).

4. An environmental temperature measuring device with an adaptive adjustment function according to claim 3, characterized in that: first pressure sensors (31) and second pressure sensors (32) are respectively arranged on both sides of the end face of the partition plate (12); the first pressure sensor (31) is used for monitoring the pressure inside the upper chamber (111); the second pressure sensor (32) is used for monitoring the pressure inside the lower chamber (112).

5. The environmental temperature measuring device with an adaptive adjustment function according to claim 4, wherein: the liquid level of the cooling water inside the lower chamber (112) rises as the depth of the tank body (11) in the cooling water increases; the cooling water inside the lower chamber (112) can block the second air hole (1122), thereby isolating the connecting pipe (15).

6. The environmental temperature measuring device with an adaptive adjustment function according to claim 5, wherein: an external air supply unit outside the upper chamber (111) fills gas into the upper chamber (111). When there is a pressure difference between the upper chamber (111) and the lower chamber (112), gas is replenished into the upper chamber (111) to increase its internal pressure, thereby causing the liquid level of the cooling water inside the lower chamber (112) to move below the second air hole (1122).

7. An ambient temperature measuring device with an adaptive adjustment function according to claim 6, characterized in that: A filter screen (1123) is provided at the bottom of the lower chamber (112).

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