Insertion-depth-adjustable temperature sensor calibration thermostatic bath device

Abstract

The invention discloses an insertion-depth-adjustable temperature sensor calibration thermostatic bath device, which belongs to the technical field of temperature calibrators, and comprises a bath body and a cylindrical container, an opening is arranged above the bath body for accommodating a temperature field medium, and a self-locking thread is arranged on the outer side wall of the cylindrical container. The barrel is in threaded connection with the opening, the barrel-shaped container is installed on the groove body, and by adjusting and controlling the installation position of the barrel-shaped container at the opening of the groove body, the temperature sensing end of the to-be-detected temperature sensor penetrating through the bottom plate of the barrel-shaped container can be inserted into the temperature field medium by different depths. According to the insertion-depth-adjustable temperature sensor calibration thermostatic bath device, the distance between the bath body cover plate and the liquid level of a temperature field medium is overcome for different types of temperature sensors to be detected, it is guaranteed that the temperature sensing end can extend into the temperature field medium by a sufficient immersion depth, and accurate metering calibration is carried out.

Description

Technical Field

[0001] The invention belongs to the technical field of temperature calibrators, and in particular relates to a thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth. Background Art

[0002] Temperature monitoring and control are necessary in many industries. Commonly used thermometers are platinum resistance thermometers and thermocouples. During verification / calibration, a constant temperature bath, such as a water bath or oil bath, is typically used as the constant temperature field. Constant temperature baths are widely used in the metrology industry because they offer excellent temperature uniformity and stability.

[0003] Currently, temperature sensor calibration typically involves placing the sensor on a thermostatic bath cover plate with a hole in the cover. The sensor's main body sits atop the plate, and the sensing tip is inserted through the hole into the bath. To ensure adequate temperature transfer and minimize heat loss, the sensor's immersion depth in the medium is typically required to be 5 to 15 times its diameter. However, due to the distance between the cover plate and the medium's surface, if this distance is large or the temperature sensor is short (e.g., a short sensor), the sensor's sensing tip is submerged in the medium for a shorter distance, making accurate metrological calibration impossible. Summary of the Invention

[0004] In response to one or more of the above-mentioned defects or improvement needs in the prior art, the present invention provides a thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth, which can adjust the immersion depth of the temperature sensing end of the temperature sensor to be tested in the temperature field medium, overcome the distance between the bath cover and the liquid surface of the temperature field medium, and perform precise measurement calibration.

[0005] To achieve the above object, the present invention provides a temperature sensor calibration thermostat device with adjustable insertion depth, which comprises A trough body is used to accommodate the temperature field medium, and an opening is provided on the cover plate of the trough body; A cylindrical container includes a cylindrical body and a base plate fixedly connected to the bottom of the cylindrical body. The base plate is provided with a plurality of through holes for allowing the temperature sensing end of the temperature sensor to be tested to pass through; the outer wall of the cylindrical body is provided with a self-locking thread along the axial direction, and the cylindrical body is threadedly connected to the opening. By adjusting the fixed position of the cylindrical body at the opening, the insertion depth of the temperature sensing end of the temperature sensor to be tested in the temperature field medium can be adjusted.

[0006] As a further improvement of the present invention, the insertion depth adjustable temperature sensor calibration constant temperature bath device further includes a stirring system and a heater, wherein the heater is disposed in the bath body and is used to heat the temperature field medium; The stirring system includes a stirring motor, a stirring motor shaft and a stirring blade. The stirring motor is installed on the cover plate and is used to control the stirring motor shaft to drive the stirring blade to rotate to stir the warm field medium, so that the heat of the heater is quickly transferred to the warm field medium in the entire tank body.

[0007] As a further improvement of the present invention, a partition is provided in the tank body, which divides the temperature field medium into a stirring zone and a working zone that are interconnected. The stirring motor shaft, stirring blades, and the heater are arranged in the stirring zone, and the opening is located above the working zone.

[0008] As a further improvement of the present invention, the insertion depth adjustable temperature sensor calibration constant temperature bath device further comprises a first temperature control sensor disposed at the bottom of the working area, for measuring the temperature of the lower portion of the working area; and The control module is respectively connected to the temperature sensor to be detected, the first temperature control sensor, the heater, and the stirring motor signal, and is used to receive the lower temperature value measured by the first temperature control sensor, and control the operation of the heater according to the temperature difference between the lower temperature value and the set temperature, so that the temperature field medium is heated to the set temperature.

[0009] As a further improvement of the present invention, the insertion depth adjustable temperature sensor calibration constant temperature bath device further includes a second temperature control sensor disposed in the middle of the working area, for measuring the temperature in the middle of the working area; The control module is connected to the second temperature control sensor, and is used to receive the middle temperature value measured by the second temperature control sensor, and control the operation of the mixer according to the difference between the middle temperature value and the lower temperature value, so that the difference between the middle temperature value and the lower temperature value is within a preset range.

[0010] As a further improvement of the present invention, a display module is provided on the side of the trough body, and the display module is signal-connected to the control module for displaying the measurement values ​​of the temperature sensor to be tested, the first temperature control sensor, and the second temperature control sensor.

[0011] As a further improvement of the present invention, a sealing structure is provided between the through hole and the temperature sensor to be detected to prevent the temperature field medium from overflowing from the through hole to the bottom plate of the cylindrical container.

[0012] As a further improvement of the present invention, the material used in the sealing structure is a material that can withstand high temperatures above 200°C; and / or, The cylindrical container is made of a material with a thermal conductivity coefficient not greater than 8W / (m﹒k).

[0013] As a further improvement of the present invention, a plurality of through holes are provided, and the diameters of the through holes are provided in a variety of ways.

[0014] As a further improvement of the present invention, the cylindrical container further comprises a top plate, which is detachably connected to the top of the cylindrical body and is used to seal the main body of the temperature sensor to be tested in the cylindrical container.

[0015] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0016] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art: (1) The thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth of the present invention comprises a bath body and a cylindrical container. An opening is provided above the bath body for accommodating a temperature field medium, and a self-locking thread is provided on the outer wall of the cylindrical container body so that the cylindrical body and the opening are threadedly connected. The cylindrical container is mounted on the bath body. By adjusting and controlling the mounting position of the cylindrical container at the bath body opening, the temperature sensing end of the temperature sensor to be tested, which is provided on the bottom plate of the cylindrical container, can be inserted into the temperature field medium at different depths. This thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth enables different types of temperature sensors to be tested to overcome the gap between the bath body cover and the liquid surface of the temperature field medium, ensuring that the temperature sensing end is sufficiently immersed in the temperature field medium for accurate metrological calibration.

[0017] (2) The thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth of the present invention is configured to separate the temperature field medium into an interconnected working area and a stirring area by a partition, and to arrange the stirring motor shaft, stirring blades, and heater in the stirring area, with the opening located above the working area, so that the stirring motor controls the stirring blades to rotate, and a negative pressure is formed below the stirring blades. The temperature field medium above the stirring blades flows clockwise under the action of gravity and suction, and the heat of the heater is transferred from the stirring area to the working area, thereby compensating for the heat loss in the working area and ensuring that the temperature of the temperature field medium in the entire tank body is controlled within the fluctuation range.

[0018] (3) The thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth of the present invention is configured to provide a first temperature control sensor and a second temperature control sensor in the working area to measure the temperature at the bottom and the middle of the working area, and to feed back the temperature to the control module to control the heater and the stirrer to operate respectively, thereby achieving precise control of the temperature field in the working area and improving the uniformity of the temperature field.

[0019] (4) The thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth of the present invention has a simple structure and is easy to use. It allows the temperature sensing ends of different temperature sensors to be tested to be immersed in the temperature field medium to a sufficient depth, thereby overcoming the gap between the tank cover and the liquid surface of the temperature field medium and improving the adaptability of the thermostatic bath device to different temperature sensors to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 1 is a schematic diagram of the overall structure of a thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth according to an embodiment of the present invention; Figure 2 This is another overall structural diagram of a thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth according to an embodiment of the present invention; Figure 3 is a top view of a cylindrical container according to an embodiment of the present invention; Figure 4 2 is a cross-sectional view of a sealing structure in an embodiment of the present invention.

[0022] In all the drawings, the same figure marks represent the same technical features, specifically: 1. trough body; 11. partition; 2. cylindrical container; 21. cylinder; 22. bottom plate; 231. first through hole; 232. second through hole; 233. third through hole; 234. fourth through hole; 24. sealing structure; 25. top plate; 3. stirring system; 31. stirring motor; 32. stirring motor shaft; 33. stirring blade; 4. heater; 5. first temperature control sensor; 6. second temperature control sensor; 7. display module; 8. temperature field medium; 81. working area; 82. stirring area; 9. temperature sensor to be tested; 91. temperature sensing end; 92. main part. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0028] Example: See also Figure 1~Figure 2 The insertion depth adjustable temperature sensor calibration constant temperature bath device in a preferred embodiment of the present invention includes a bath body 1 and a cylindrical container 2.

[0029] Among them, the trough body 1 is used to accommodate the temperature field medium 8, and an opening is provided on the cover plate of the trough body 1; the cylindrical container 2 includes a cylinder 21 and a bottom plate 22 fixedly connected to the bottom of the cylinder 21, and a plurality of through holes are opened on the bottom plate 22 for allowing the temperature sensing end 91 of the temperature sensor 9 to be tested to pass through; the outer wall of the cylinder 21 is provided with a self-locking thread along the axial direction, and the cylinder 21 is threadedly connected to the opening. By adjusting the fixed position of the cylinder 21 at the opening, the insertion depth of the temperature sensing end 91 of the temperature sensor 9 to be tested in the temperature field medium 8 can be adjusted.

[0030] When the insertion depth adjustable temperature sensor calibration thermostat device of this embodiment is used, the temperature sensor to be tested 9 is first installed on the cylindrical container 2. The installation position of the cylindrical container 2 at the opening of the tank body 1 is controlled by the self-locking thread, so that the temperature sensing end 91 of the temperature sensor to be tested 9 can be inserted into the temperature field medium 8 at different depths, such as Figure 1 In the embodiment, the top of the outer wall of the cylinder 21 is installed at the opening of the tank 1, and the temperature sensing end 91 of the corresponding temperature sensor 9 to be detected is fully inserted into the temperature field medium 8, and Figure 2 In the embodiment, the bottom of the outer wall of the cylinder 21 is mounted at the opening of the tank body 1, and the temperature sensing end 91 of the corresponding temperature sensor 9 to be tested is inserted into the temperature field medium 8 to the minimum depth. The temperature sensor calibration thermostat device with adjustable insertion depth in this embodiment allows different types of temperature sensors 9 to be tested to overcome the gap between the tank body 1 cover and the liquid surface of the temperature field medium 8, and the temperature sensing end 91 can be inserted into the temperature field medium 8 to a sufficient depth for accurate measurement and calibration.

[0031] Preferably, the material used for the cylindrical container 2 is a material with a thermal conductivity coefficient not greater than 8W / (m﹒k), such as titanium alloy, tetrafluoroethylene or ceramic material, etc., to reduce the heat exchange between the cylindrical container 2 and the temperature field medium 8 and ensure the uniformity of the temperature field.

[0032] Preferably, the cylindrical container 2 further includes a top plate 25 , which is detachably connected to the top of the cylindrical body 21 and is used to seal the main body 92 of the temperature sensor 9 to be detected in the cylindrical container 2 .

[0033] In this embodiment, the top plate 25 is preferably fixed to the screw hole on the top surface of the cylinder 21 by screws. The top plate 25 can reduce the heat transfer when there is a temperature difference between the surface temperature of the temperature sensor to be tested 9 and the ambient temperature, and can ensure that the temperature sensor to be tested 9 and the temperature field medium 8 quickly maintain temperature field balance.

[0034] Preferably, the bottom plate 22 is provided with a plurality of through holes, and the diameters of the through holes are provided in various ways, for example, Figure 3As described above, the through holes are preferably provided with a first through hole 231 , a second through hole 232 , a third through hole 233 , and a fourth through hole 234 with diameters of 6 mm, 8 mm, 10 mm, and 12 mm, which can be freely arranged according to the diameter of the temperature sensor 9 to be detected.

[0035] Preferably, a sealing structure 24 is provided between the through hole and the temperature sensor 9 to be detected, so as to prevent the temperature field medium 8 from overflowing from the through hole to the bottom plate 22 of the cylindrical container 2 .

[0036] Specifically preferably, Figure 4 As shown, the bottom of the sealing structure 24 is a conical structure, the outer side of the conical structure is matched and fixed with the through hole, and the inner side corresponds to the diameter of the temperature sensor 9 to be detected. The conical structure can ensure the sealing performance of the sealing structure 24.

[0037] Preferably, the sealing structure 24 is made of a material that can withstand high temperatures above 200°C, such as polytetrafluoroethylene, high-temperature silicone rubber, etc.

[0038] Further preferably, the insertion depth adjustable temperature sensor calibration thermostat device also includes a stirring system 3 and a heater 4, the heater 4 is arranged in the tank body 1, and is used to heat the temperature field medium 8; the stirring system 3 includes a stirring motor 31, a stirring motor shaft 32 and a stirring blade 33, and the stirring motor 31 is installed on the cover plate to control the stirring motor shaft 32 to drive the stirring blade 33 to rotate to stir the temperature field medium 8, so that the heat of the heater 4 is quickly transferred to all the temperature field media 8 in the tank body 1, thereby reducing the temperature difference of the temperature field medium 8 in different areas.

[0039] Preferably, a partition 11 is provided in the tank body 1, and the partition 11 divides the temperature field medium 8 into a stirring zone 82 and a working zone 81 that are interconnected. The stirring motor shaft 32, the stirring blade 33, and the heater 4 are arranged in the stirring zone 82, and the opening is located above the working zone 81.

[0040] In this embodiment, when the stirring motor 31 controls the stirring blade to rotate, negative pressure is formed below the stirring blade 33, and the temperature field medium 8 above the stirring blade 33 realizes the clockwise flow of the temperature field medium 8 under the action of gravity and suction, and transfers the heat of the heater 4 from the stirring zone 82 to the working zone 81, supplementing the heat loss of the working zone 81, and ensuring that the temperature of the temperature field medium 8 in the entire tank body 1 is controlled within the fluctuation range.

[0041] Preferably, the insertion depth adjustable temperature sensor calibration constant temperature bath device further comprises a refrigerator provided in the working area 81 for cooling the temperature field medium 8 in the bath, and is used to reduce the temperature of the temperature field medium 8 to a corresponding temperature.

[0042] Furthermore, the insertion depth adjustable temperature sensor calibration thermostat device preferably also includes a first temperature control sensor 5 arranged at the bottom of the working area 81, for measuring the lower temperature of the working area 81; and a control module, which is respectively connected to the temperature sensor to be tested 9, the first temperature control sensor 5, the heater 4, and the stirring motor 31 signal, for receiving the lower temperature value measured by the first temperature control sensor 5, and controlling the operation of the heater 4 according to the temperature difference between the lower temperature value and the set temperature, so that the temperature field medium 8 is heated to the set temperature.

[0043] Preferably, the insertion depth adjustable temperature sensor calibration thermostat device also includes a second temperature control sensor 6 arranged in the middle of the working area 81, for measuring the middle temperature of the working area 81; the control module is connected to the second temperature control sensor 6, for receiving the middle temperature value measured by the second temperature control sensor 6, and controlling the operation of the mixer according to the difference between the middle temperature value and the lower temperature value, so that the difference between the middle temperature value and the lower temperature value is within a preset range.

[0044] In this embodiment, the temperature field in the effective temperature range of the working area 81 can be further monitored by the second temperature control sensor 6, thereby achieving precise control of the temperature field in the working area 81 and improving the uniformity of the temperature field.

[0045] Preferably, the second temperature control sensor 6 is a short-branch temperature control sensor to avoid interference with the temperature sensor 9 to be detected.

[0046] Preferably, a display module 7 is provided on the side of the tank body 1, and the display module 7 is signal-connected to the control module for displaying the measurement values ​​of the temperature sensor 9 to be detected, the first temperature control sensor 5, and the second temperature control sensor 6.

[0047] Preferably, the control module verifies the performance of the temperature sensor 9 to be tested by recording the temperature difference between the measured value of the temperature sensor 9 to be tested and the standard temperature field.

[0048] The thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth in the present invention controls the installation position of the cylindrical container 2 at the opening of the bath body 1 by means of a self-locking thread on the outer wall of the tub 21, so that the temperature sensing end 91 of the temperature sensor 9 to be tested can be inserted into the temperature field medium 8 at different depths. The device has a simple structure and is easy to use, and enables the temperature sensing ends 91 of different temperature sensors 9 to be tested to be inserted into the temperature field medium 8 to a sufficient immersion depth, thereby overcoming the gap between the cover plate of the bath body 1 and the liquid surface of the temperature field medium 8 and performing accurate measurement calibration.

[0049] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth, characterized in that: include: A trough body is used to accommodate the temperature field medium, and an opening is provided on the cover plate of the trough body; A cylindrical container includes a cylindrical body and a base plate fixedly connected to the bottom of the cylindrical body. The base plate is provided with a plurality of through holes for allowing the temperature sensing end of the temperature sensor to be tested to pass through; the outer wall of the cylindrical body is provided with a self-locking thread along the axial direction, and the cylindrical body is threadedly connected to the opening. By adjusting the fixed position of the cylindrical body at the opening, the insertion depth of the temperature sensing end of the temperature sensor to be tested in the temperature field medium can be adjusted.

2. The thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth according to claim 1, characterized in that: It also includes a stirring system and a heater, wherein the heater is arranged in the tank body and is used to heat the temperature field medium; The stirring system includes a stirring motor, a stirring motor shaft and a stirring blade. The stirring motor is installed on the cover plate and is used to control the stirring motor shaft to drive the stirring blade to rotate to stir the warm field medium, so that the heat of the heater is quickly transferred to the warm field medium in the entire tank body.

3. The thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth according to claim 2, characterized in that: A partition is provided in the tank body, and the partition divides the temperature field medium into a stirring zone and a working zone that communicate with each other. The stirring motor shaft, the stirring blades, and the heater are arranged in the stirring zone, and the opening is located above the working zone.

4. The thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth according to claim 3, characterized in that: Also included is a first temperature control sensor disposed at the bottom of the working area, for measuring the temperature of the lower portion of the working area; as well as The control module is respectively connected to the temperature sensor to be calibrated, the first temperature control sensor, the heater, and the stirring motor signal, and is used to receive the lower temperature value measured by the first temperature control sensor, and control the operation of the heater according to the temperature difference between the lower temperature value and the set temperature, so that the temperature field medium is heated to the set temperature.

5. The thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth according to claim 4, characterized in that: Also included is a second temperature control sensor disposed in the middle of the working area, for measuring the temperature in the middle of the working area; The control module is connected to the second temperature control sensor, and is used to receive the middle temperature value measured by the second temperature control sensor, and control the operation of the mixer according to the difference between the middle temperature value and the lower temperature value, so that the difference between the middle temperature value and the lower temperature value is within a preset range.

6. The temperature sensor calibration constant temperature bath device with adjustable insertion depth according to any one of claims 1 to 5, characterized in that: A display module is provided on the side of the tank body. The display module is signal-connected to the control module and is used to display the measurement values ​​of the temperature sensor to be detected, the first temperature control sensor, and the second temperature control sensor.

7. The temperature sensor calibration constant temperature bath device with adjustable insertion depth according to any one of claims 1 to 5, characterized in that: A sealing structure is provided between the through hole and the temperature sensor to be detected to prevent the temperature field medium from overflowing from the through hole to the bottom plate of the cylindrical container.

8. The thermostatic bath device for calibrating a temperature sensor with adjustable insertion depth according to claim 7, characterized in that: The sealing structure is made of a material that can withstand high temperatures above 200°C; and / or, The cylindrical container is made of a material with a thermal conductivity coefficient not greater than 8W / (m﹒k).

9. The temperature sensor calibration constant temperature bath device with adjustable insertion depth according to any one of claims 1 to 5, characterized in that: There are a plurality of through holes, and the diameters of the through holes are various.

10. The thermostatic bath device for temperature sensor calibration with adjustable insertion depth according to any one of claims 1 to 5, characterized in that: The cylindrical container further comprises a top plate, which is detachably connected to the top of the cylindrical body and is used to seal the main body of the temperature sensor to be tested in the cylindrical container.

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