A temperature instrument calibration device

Abstract

The utility model relates to temperature instrument calibration technical field discloses a temperature instrument calibration device, including the shell, the detection piece is inserted in the shell inner chamber, be equipped with the calibration subassembly in the detection piece inner chamber. Through the heating rod, the medium in the detection piece is heated to constant temperature, preheats to U -shaped tube, when the temperature that second temperature sensor and first temperature sensor monitored is same, starts first extraction pump, and the medium in the detection piece enters into U -shaped tube through first extraction pipe, and the temperature of the medium in U -shaped tube is transferred to the upper end of metal heat conduction stick, after a period of heat transfer, the temperature of metal heat conduction stick keeps constant, can close and install the to be measured instrument of calibration to the upper end of metal heat conduction stick, in the process of calibrating the to be measured instrument, the medium temperature in detection device keeps constant, thereby can avoid the error of temperature change to calibration operation.

Description

Technical Field

[0001] This utility model relates to the field of temperature instrument calibration technology, and in particular to a temperature instrument calibration device. Background Technology

[0002] As we all know, temperature display instruments can accurately and promptly reflect the operating status of thermal equipment and systems, providing operators with reliable operational information. The quality of temperature display instruments directly affects whether heat-treated workpieces are qualified. Therefore, these temperature control instruments must be calibrated regularly to ensure that they are working properly.

[0003] The utility model patent CN219434243U discloses a temperature display instrument calibration device, including a housing, an anti-slip pad on the lower surface of the housing, a detection element on the upper surface of the housing, a standard temperature instrument mounted on the upper end of the detection element, a stirring motor on the right side of the standard temperature instrument, a temperature instrument to be calibrated on the right side of the stirring motor, a transmission rod connected to the output shaft of the stirring motor, a stirring blade mounted on the outer surface of the transmission rod, and a heat insulation layer on the inner wall of the detection element. This utility model, through the stirring motor, drives the transmission rod to rotate, causing the stirring blade to move, thereby stirring the medium inside the detection element. This effectively reduces the deviation in calibration accuracy caused by excessively high or low local temperatures of the medium, and the heat insulation layer inside the detection element provides insulation, thus preventing excessively rapid temperature loss of the medium.

[0004] After the medium enters the detection element, the detection element cannot provide a constant temperature environment. Since the calibration of the temperature instrument takes time, when the medium enters the detection element, temperature is transferred between them, and the temperature inside the detection element gradually decreases. As a result, the temperature displayed by the temperature instrument gradually decreases, which makes it easy for the temperature instrument to be calibrated in an environment with constantly changing temperature. Utility Model Content

[0005] Given that the medium in the above-mentioned device cannot provide a constant temperature environment inside the detection element after entering the detection element, and since the calibration of the temperature instrument takes time, when the medium enters the detection element, temperature transfer occurs between them, and the temperature inside the detection element gradually decreases, thus the temperature displayed by the temperature instrument gradually decreases. Therefore, the temperature instrument calibration is prone to errors in an environment with constantly changing temperatures. This utility model is proposed.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a temperature instrument calibration device, including a housing, a detection element inserted in the inner cavity of the housing, a calibration component in the inner cavity of the detection element, the calibration component including a U-shaped tube fixed in the inner cavity of the detection element, two sets of symmetrical metal heat-conducting rods inserted at both ends of the U-shaped tube, a first temperature sensor in the inner wall of the U-shaped tube, a first extraction pump in the upper end of the outer wall of the U-shaped tube, a first extraction tube connected to the water inlet of the first extraction pump, a second extraction pump in the bottom end of the detection element, a second extraction tube connected to the water inlet of the second extraction pump, a solenoid valve connected to the upper end of the second extraction tube, heating rods in all four corners of the inner cavity of the detection element, a second temperature sensor in the bottom end of the detection element, and the upper ends of the two sets of metal heat-conducting rods passing through the detection element and the housing and respectively mounted on a standard instrument and a test instrument.

[0007] In a preferred embodiment of the temperature instrument calibration device of this utility model, an insulation layer is inserted in the space between the outer shell and the detection element.

[0008] In a preferred embodiment of the temperature instrument calibration device of this utility model, a mixing component is provided in the inner cavity of the detection element. The mixing component includes a motor located at the upper end of the outer shell. The output end of the motor passes through the outer shell, the insulation layer, and the detection element from top to bottom and is connected to a first gear. A first stirring element is fixedly provided at the lower end of the first gear. Two sets of symmetrical second gears are provided on both sides of the first gear. The second gear and the first gear mesh with each other. The upper end of the second gear is rotatably connected to the upper end of the detection element. A second stirring element is fixedly provided at the lower end of the second gear.

[0009] In a preferred embodiment of the temperature instrument calibration device of this utility model, the water outlet of the first extraction pump is connected to the upper end of the U-shaped tube, and the water outlet of the second extraction pump is connected to the lower end of the U-shaped tube.

[0010] In a preferred embodiment of the temperature instrument calibration device of this utility model, an observation window is provided on the outer wall of the outer casing.

[0011] As a preferred embodiment of the temperature instrument calibration device of this utility model, a PLC controller is provided at the upper end of the housing, and the motor, the first extraction pump, the second extraction pump, the solenoid valve, the heating rod, and the second temperature sensor are all electrically connected to the PLC controller.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects:

[0013] 1. This utility model uses a heating rod to heat the medium inside the detection element to a constant temperature, preheating the U-shaped tube. When the temperatures monitored by the second and first temperature sensors are the same, the first extraction pump is started, and the medium inside the detection element enters the U-shaped tube through the first extraction tube. The temperature of the medium inside the U-shaped tube is transferred to the upper end of the metal heat-conducting rod. After a period of heat transfer, the temperature of the metal heat-conducting rod remains constant, and the device can be shut off. The instrument to be calibrated can then be installed on the upper end of the metal heat-conducting rod. During the calibration of the instrument to be calibrated, the temperature of the medium inside the detection device remains constant, thereby avoiding errors in the calibration operation caused by temperature changes.

[0014] 2. In this utility model, during the heating of the medium inside the test piece by the heating rod, the U-shaped tube can be activated to drive the first gear to rotate. The first gear and the second gear mesh with each other, thereby the first gear drives the second gear to rotate. The first gear drives the first stirring element to rotate, and the second gear drives the second stirring element to rotate. Thus, the rotation of the first stirring element and the second stirring element continuously stirs the medium inside the test piece, which not only accelerates the heat transfer between the media, but also makes the medium inside the test piece heated evenly, avoiding calibration errors caused by uneven heating of the medium. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the temperature instrument calibration device of this utility model;

[0016] Figure 2 This is a partial cross-sectional three-dimensional structural diagram of the temperature instrument calibration device of this utility model;

[0017] Figure 3 This is a three-dimensional cross-sectional structural diagram of the calibration component of the temperature instrument calibration device of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the hybrid components of the temperature instrument calibration device of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Outer shell; 2. Insulation layer; 3. Detection component; 4. Mixing assembly; 41. Motor; 42. First gear; 43. First stirring component; 44. Second gear; 45. Second stirring component; 5. Calibration assembly; 51. U-shaped tube; 52. Metal heat-conducting rod; 53. First temperature sensor; 54. First extraction pump; 55. First extraction tube; 56. Second extraction pump; 57. Second extraction tube; 58. Solenoid valve; 6. Heating rod; 7. Second temperature sensor; 8. Standard instrument; 9. Instrument under test; 10. PLC controller; 11. Observation window. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Example 1

[0023] Reference Figures 1-3 This is the first embodiment of the present invention, which provides a temperature instrument calibration device, including a housing 1, a detection element 3 inserted in the inner cavity of the housing 1, a calibration component 5 in the inner cavity of the detection element 3, the calibration component 5 including a U-shaped tube 51 fixed in the inner cavity of the detection element 3, two sets of symmetrical metal heat-conducting rods 52 inserted at both ends of the U-shaped tube 51, a first temperature sensor 53 in the inner wall of the U-shaped tube 51, a first extraction pump 54 in the upper end of the outer wall of the U-shaped tube 51, a first extraction tube 55 connected to the water inlet end of the first extraction pump 54, a second extraction pump 56 in the bottom end of the detection element 3, a second extraction tube 57 connected to the water inlet end of the second extraction tube 56, a solenoid valve 58 connected to the upper end of the second extraction tube 57, heating rods 6 in the four corners of the inner cavity of the detection element 3, a second temperature sensor 7 in the bottom end of the detection element 3, and the upper ends of the two sets of metal heat-conducting rods 52 passing through the detection element 3 and the housing 1 and respectively mounting a standard instrument 8 and a test instrument 9.

[0024] An insulation layer 2 is inserted into the space between the outer shell 1 and the testing component 3.

[0025] The outlet of the first pump 54 is connected to the upper end of the U-tube 51, and the outlet of the second pump 56 is connected to the lower end of the U-tube 51.

[0026] An observation window 11 is provided on the outer wall of the outer casing 1.

[0027] The upper part of the outer casing 1 is equipped with a PLC controller 10, and the motor 41, the first extraction pump 54, the second extraction pump 56, the solenoid valve 58, the heating rod 6, and the second temperature sensor 7 are all electrically connected to the PLC controller 10.

[0028] The detection element 3 is filled with a heatable medium, and its horizontal plane is below the opening at the upper end of the U-shaped tube 51. The PLC controller 10 controls the heating rod 6 to start heating the liquid inside the detection element 3, maintaining the temperature of the heating rod 6 constant. The temperature of the medium inside the detection element 3 gradually rises to the same level as the heating rod 6. Simultaneously, the temperature of the U-shaped tube 51 is heated as the temperature of the medium inside the detection element 3 increases, and the temperature of the U-shaped tube 51 also rises with the increase in the medium temperature. The temperature of the medium inside the detection element 3 can be detected by the second temperature sensor 7, while the first temperature sensor 53 can... The temperature of the inner wall of the U-shaped tube 51 is detected. When the temperature of the medium and the temperature of the U-shaped tube 51 rise to the temperature controlled by the heating rod 6, and the temperatures detected by the second temperature sensor 7 and the first temperature sensor 53 are the same, the first extraction pump 54 is started by the PLC controller 10. The medium in the detection element 3 enters the U-shaped tube 51 through the first extraction tube 55. When the medium in the U-shaped tube 51 is filled to below the upper outlet of the first extraction pump 54, the first extraction pump 54 is turned off. Through the above operation, the U-shaped tube 51 can be preheated. When the detection element 3... When the medium inside the U-tube 51 enters, it does not exchange heat with the U-tube 51. The heating rod 6 maintains a constant temperature, and the temperature of the medium inside the U-tube 51 is always the same as the temperature of the medium outside the U-tube 51. The temperature of the medium inside the U-tube 51 is transferred to the upper end of the metal heat-conducting rod 52. After a period of heat transfer, the temperature of the metal heat-conducting rod 52 remains unchanged, and the circuit can be closed. The instrument under test 9 with calibration is installed on the upper end of the metal heat-conducting rod 52, and the standard instrument 8 aligned with it is installed on the upper end of another set of metal heat-conducting rods 52. The standard instrument 8 and... The instrument under test 9 detects the temperature of the metal heat-conducting rod 52. The temperature displayed by the standard instrument 8 remains constant. Based on the temperature displayed by the instrument under test 9, the instrument under test 9 is calibrated. During the calibration process, the temperature of the medium in the detection device remains constant, thus avoiding errors caused by temperature changes in the calibration operation. After calibration, the solenoid valve 58 can be opened to start the second extraction pump 56, which draws the medium in the U-shaped tube 51 into the detection element 3 through the second extraction tube 57. After extraction, the second extraction pump 57 is turned off.

[0029] Example 2

[0030] Reference Figure 1-4This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a mixing component 4 is provided in the inner cavity of the detection component 3. The mixing component 4 includes a motor 41 located at the upper end of the outer shell 1. The output end of the motor 41 passes through the outer shell 1, the insulation layer 2, and the detection component 3 from top to bottom and is connected to a first gear 42. A first stirring component 43 is fixedly provided at the lower end of the first gear 42. Two sets of symmetrical second gears 44 are provided on both sides of the first gear 42. The second gears 44 and the first gears 42 mesh with each other. The upper end of the second gears 44 is rotatably connected to the upper end of the detection component 3. A second stirring component 45 is fixedly provided at the lower end of the second gears 44.

[0031] During the heating of the medium inside the test piece 3 by the heating rod 6, the U-shaped tube 51 can be activated to drive the first gear 42 to rotate. The first gear 42 and the second gear 44 mesh with each other, thereby the first gear 42 drives the second gear 44 to rotate. The first gear 42 drives the first stirring element 43 to rotate, and the second gear 44 drives the second stirring element 45 to rotate. Thus, the first stirring element 43 and the second stirring element 45 rotate continuously to stir the medium inside the test piece 3, which not only accelerates the heat transfer between the media, but also makes the medium inside the test piece 3 heated evenly, avoiding calibration errors caused by uneven heating of the medium.

[0032] The remaining structure is the same as that in Example 1.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A temperature instrument calibration device, comprising a housing (1), characterized in that: A detection element (3) is inserted into the inner cavity of the outer shell (1). A calibration component (5) is provided in the inner cavity of the detection element (3). The calibration component (5) includes a U-shaped tube (51) fixed in the inner cavity of the detection element (3). Two sets of symmetrical metal heat-conducting rods (52) are inserted at both ends of the U-shaped tube (51). A first temperature sensor (53) is provided in the inner wall of the U-shaped tube (51). A first extraction pump (54) is provided at the upper end of the outer wall of the U-shaped tube (51). The water inlet of the first extraction pump (54) is connected to a first suction pump. The bottom of the detection component (3) is provided with a second extraction pump (56), the water inlet of the second extraction pump (56) is connected to a second extraction pipe (57), the upper end of the second extraction pipe (57) is connected to a solenoid valve (58), the four corners of the inner cavity of the detection component (3) are provided with heating rods (6), the bottom of the detection component (3) is provided with a second temperature sensor (7), the upper ends of the two sets of metal heat-conducting rods (52) pass through the detection component (3) and the outer shell (1) and are respectively equipped with a standard instrument (8) and a test instrument (9).

2. The temperature instrument calibration device according to claim 1, characterized in that: An insulation layer (2) is inserted into the space between the outer shell (1) and the detection component (3).

3. The temperature instrument calibration device according to claim 1, characterized in that: The inner cavity of the detection component (3) is provided with a mixing component (4). The mixing component (4) includes a motor (41) located at the upper end of the outer shell (1). The output end of the motor (41) passes through the outer shell (1), the insulation layer (2), and the detection component (3) from top to bottom and is connected to a first gear (42). A first stirring component (43) is fixedly provided at the lower end of the first gear (42). Two sets of second gears (44) are provided on both sides of the first gear (42). The second gear (44) and the first gear (42) mesh with each other. The upper end of the second gear (44) is rotatably connected to the upper end of the detection component (3). A second stirring component (45) is fixedly provided at the lower end of the second gear (44).

4. The temperature instrument calibration device according to claim 1, characterized in that: The outlet of the first pump (54) is connected to the upper end of the U-shaped pipe (51), and the outlet of the second pump (56) is connected to the lower end of the U-shaped pipe (51).

5. The temperature instrument calibration device according to claim 1, characterized in that: The outer wall of the outer casing (1) is provided with an observation window (11).

6. The temperature instrument calibration device according to claim 3, characterized in that: The upper end of the housing (1) is provided with a PLC controller (10), and the motor (41), the first extraction pump (54), the second extraction pump (56), the solenoid valve (58), the heating rod (6), and the second temperature sensor (7) are all electrically connected to the PLC controller (10).

Images