A heat soaking component, temperature calibration instrument and temperature calibration method

Abstract

The present invention provides a heat equalizing component, a temperature calibrator and a temperature calibration method, which are used to calibrate a temperature device to be tested. The heat equalizing component includes a heat equalizing block and a sealing cover. The heat equalizing block is provided with a blind hole for accommodating a temperature bag or a sensing end of the temperature device to be tested. The blind hole is filled with a heat-conducting liquid. The open end of the blind hole is provided with an overflow groove to receive the heat-conducting liquid that overflows when the temperature bag or the sensing end of the temperature device to be tested is inserted into the blind hole. The present invention can form a balanced temperature field for the temperature bag or the sensing end of the temperature device to be tested by arranging an overflow groove on the heat equalizing block in conjunction with the blind hole filled with heat-conducting liquid, thereby improving the inspection accuracy; by arranging a sealing cover used in conjunction with the heat equalizing block, it is used to prevent the liquid in the blind hole from leaking after the inspection is completed, thereby facilitating the storage and carrying of the heat equalizing block; the temperature calibrator provides a balanced temperature field for the inspection of the temperature device to be tested by arranging the heat equalizing component, and is suitable for on-site high-precision inspection of the temperature device to be tested.

Description

Technical Field

[0001] The invention belongs to the technical field of temperature calibration, and relates to a heat soaking component, a temperature calibrator and a temperature calibration method. Background Art

[0002] In many industrial applications, temperature has an important impact on the operation of equipment. Usually, temperature detection devices and / or temperature controllers are set up to accurately monitor or control the operating temperature of the equipment. Some applications have strict requirements on temperature control accuracy. Thermometers or temperature controllers need to be calibrated after long-term use. For example, the calibration of transformer pressure thermometers in power systems is not realistic because the calibration sites are scattered in different substations in the power supply area. It is usually necessary to carry heavy and large calibration equipment, and the actual test operation process is also relatively complicated, with low calibration efficiency and inconvenient application.

[0003] There is an urgent need for temperature calibrators with portability and sufficient accuracy to meet the needs of on-site temperature calibration. Since the shapes and sizes of the temperature bulbs / sensing ends of various thermometers or temperature controllers are different, but the slots used to accommodate the temperature bulbs / sensing ends of the thermometers or temperature controllers in portable temperature calibrators are generally of fixed sizes, how to provide a balanced temperature field to meet the heat transfer performance of various types of temperature bulbs or sensing ends is a challenge. Summary of the invention

[0004] The invention provides a heat spreading component capable of improving heat transfer function.

[0005] The present invention adopts the following technical solutions:

[0006] A heat equalizing component is used to calibrate a temperature device to be tested on site, comprising a heat equalizing block (1), the heat equalizing block (1) being provided with a blind hole (11) for accommodating a temperature bulb or a sensing end of the temperature device to be tested, the blind hole (11) being filled with a heat transfer liquid, and an overflow groove (12) being provided at the open end of the blind hole (11) for receiving the heat transfer liquid overflowing when the temperature bulb or the sensing end of the temperature device to be tested is inserted into the blind hole.

[0007] In the above-mentioned heat equalizing assembly, the overflow groove (12) is provided with two levels, including a first overflow groove (121) arranged on the inner side wall of the opening end of the blind hole (11) and a second overflow groove (122) arranged on the upper edge of the opening end of the blind hole (11) and opening upward.

[0008] In the above-mentioned heat equalizing component, the first overflow groove (121) is an annular groove, and a plurality of lifting holes (13) are symmetrically arranged on the upper groove wall of the groove to facilitate the placement or removal of the heat equalizing block (1) into or out of the furnace body of the temperature calibrator; the capacity of the second overflow groove (122) is greater than that of the first overflow groove (121), and the bottom surface of the second overflow groove (122) is formed by extending outward from the upper edge of the opening end of the blind hole (11).

[0009] In the above-mentioned heat-saturating assembly, the heat-saturating block (1) is a columnar structure made of a high thermal conductivity alloy material, the heat-saturating block is provided with one or more blind holes (11), and each blind hole (11) is correspondingly provided with a first overflow groove (121).

[0010] All the blind holes share a second overflow groove (122).

[0011] The heat-saturating assembly further comprises a sealing cover (2) for sealing the blind hole opening end of the heat-saturating block (1); the sealing cover (2) comprises an integrally formed covering portion (21) and a connecting portion (22); the connecting portion (22) is a hollow structure.

[0012] The diameter of the combining portion (22) is smaller than the diameter of the covering portion (21), and the outer diameter of the combining portion (22) matches the inner diameter of the second overflow groove (122) of the heat equalizing block (1).

[0013] In the above-mentioned heat-spreading assembly, an annular groove (221) is provided on the outer periphery of the joint portion (22), and an O-ring (3) is placed in the annular groove to form a sealing structure.

[0014] In the above-mentioned heat-averaging assembly, the covering portion (21) of the sealing cover (2) is symmetrically provided with lifting grooves (211), and the lifting grooves (211) are provided with an upper opening and a side opening that are connected to each other, forming a structure that is easy to lift, and the lifting grooves are not connected to the cavity of the coupling portion (22).

[0015] The present invention also provides a temperature calibrator, which comprises a furnace body (102) and a temperature measurement and controller (101), wherein a cold source (103), a heat source (104), a detection cavity and a temperature sensor assembly (105) are arranged in the furnace body (102), and the cold source (103), the heat source (104), the temperature sensor assembly (105) and a temperature device to be detected whose temperature bag or sensing end is inserted into the detection cavity are respectively electrically connected to the temperature measurement and controller (101), and the temperature sensor assembly (105) is in contact with the detection cavity, wherein the detection cavity is any of the above-mentioned heat-averaging assemblies (01).

[0016] The temperature calibrator further comprises a touch screen display (106) electrically connected to the temperature measurement and controller (101).

[0017] The present invention also provides a temperature calibration method, which is operated by using the above-mentioned temperature calibrator, and comprises the following steps:

[0018] Step 1: placing the heat-matching block (1) into the furnace body (102), and adding a proper amount of heat-conducting liquid into the blind hole (11) of the heat-matching block (1); or adding a proper amount of heat-conducting liquid into the blind hole (11) of the heat-matching block (1), and then placing the heat-matching block (1) into the furnace body (102);

[0019] Step 2: inserting the temperature bulb or the sensing end of the temperature device to be tested into the corresponding blind hole (11), filling a portion of the heat-conducting liquid in the gap between the temperature bulb or the sensing end and the inner wall of the blind hole (11), and the rest of the heat-conducting liquid overflowing into the overflow groove (12);

[0020] Step 3: The temperature measurement and controller (101) controls the cold source (103) or the heat source (104) according to a preset temperature value to control the temperature in the heat equalizing block (1) to a preset temperature, and then reads the temperature values ​​measured by the temperature sensor assembly (105) and the temperature device to be detected;

[0021] Step 4: The temperature measurement and controller (101) processes and analyzes the acquired temperature value to obtain a verification result of the temperature device under test, and displays the acquired temperature value and the verification result on a touch display screen (106).

[0022] Due to the above design, the present invention has the following characteristics: the heat equalizing block of the heat equalizing assembly of the present invention is provided with an overflow groove and a blind hole filled with heat-conducting liquid, so that a balanced temperature field can be formed after the temperature bag or the sensing end of the temperature device to be tested is inserted into the blind hole, thereby improving the inspection accuracy; a sealing cover is provided to be used in conjunction with the heat equalizing block, so that after the verification is completed, the blind hole opening end of the heat equalizing block is covered and sealed by the sealing cover to prevent liquid leakage in the blind hole, thereby facilitating the storage and carrying of the heat equalizing block; the sealing performance of the combination of the sealing cover and the heat equalizing block is further increased by the annular groove provided on the joint part of the sealing cover and the O-ring placed in the annular groove; the pulling grooves are symmetrically provided on the covering part 21 of the sealing cover, so as to facilitate the extraction of the heat equalizing assembly; the temperature calibrator provides a balanced temperature field for the verification of the temperature device to be tested by providing the heat equalizing assembly, thereby achieving the purpose of on-site high-precision verification of the temperature device to be tested, greatly improving the efficiency of temperature verification, and reducing the complexity of temperature verification. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the exploded structure of the heat soaking assembly of the present invention;

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the heat-saturating assembly of the present invention after longitudinal section;

[0025] Figure 3It is a partial longitudinal cross-sectional view after the heat-saturating block and the sealing cover are covered;

[0026] Figure 4 It is the principle block diagram of the temperature calibrator of the present invention.

[0027] Main markings:

[0028] 01-heat soaking assembly;

[0029] 1-heating block, 11-blind hole, 12-overflow groove, 121-first overflow groove, 122-second overflow groove, 13-lifting hole;

[0030] 2-sealing cover, 21-covering part, 211-lifting groove, 22-joining part, 221-ring groove, 23-step;

[0031] 3-O-ring;

[0032] 100-Temperature calibrator;

[0033] 101 - temperature measurement and controller, 102 - furnace body, 103 - cold source, 104 - heat source, 105 - temperature sensor assembly, 106 - touch display screen. DETAILED DESCRIPTION

[0034] The following is a detailed description of the heat soaking assembly, temperature calibrator and temperature calibration method of the present invention in conjunction with specific embodiments and drawings.

[0035] Figures 1 to 3 This is an example of the structure of the heat spreader assembly of the present invention. Figures 1 to 3 As shown, the heat equalizing component 01 of the present invention is used to provide a balanced temperature field for the temperature package or sensing end of the temperature device to be tested, including a heat equalizing block 1, the heat equalizing block 1 is provided with a blind hole 11 for accommodating the temperature package or sensing end of the temperature device to be tested, and the blind hole 11 is filled with an appropriate amount of heat transfer fluid (such as heat transfer oil, water, etc.) to provide a balanced temperature field for the temperature package or sensing end of the temperature device to be tested. The inner diameter of the blind hole 11 can be determined according to the diameter of the temperature package or sensing end of the temperature device to be tested. For example, the nominal diameter of the temperature package or sensing end of the temperature device to be tested is 14mm, and the diameter of the corresponding blind hole 11 of the heat equalizing block 1 is at least greater than 14mm (for example, 14.5mm). Therefore, after the temperature package or sensing end of the temperature device to be tested is inserted into the blind hole 11, there is an air gap between it and the inner wall of the blind hole 11. The air gap has poor thermal conductivity, resulting in a large deviation or uneven thermal conductivity in the temperature detected by the temperature package or sensing end of the temperature device to be tested, resulting in poor inspection accuracy. In order to provide a balanced temperature field and ensure the inspection accuracy, the blind hole 11 is filled with a liquid with good thermal conductivity, and an overflow groove 12 is provided at the open end of the blind hole 11 for temporarily containing the liquid overflowing from the blind hole during inspection.

[0036] In one embodiment, referring to Figure 1, the opening end of the blind hole 11 is provided with a two-stage overflow groove. That is, a first overflow groove 121 is provided on the inner side wall of the opening end of the blind hole 11. The first overflow groove 121 is an annular groove, and a plurality of lifting holes 13 are symmetrically arranged on its upper groove wall. Preferably, the lifting holes 13 are provided in two and symmetrically distributed. The heat equalizing block 1 is usually placed in the furnace body of the temperature calibrator. The setting of the lifting holes 13 facilitates the placement of the heat equalizing block 1 containing the temperature bag or the induction end of the temperature device to be tested into the furnace body or the extraction of the furnace body. For example, the hook ends of the hook-shaped lifting tool can be respectively extended into the symmetrical lifting holes 13 to place the heat equalizing block 1 into or extract it from the furnace body; the upper edge of the opening end of the blind hole 11 extends outward to form a second overflow groove 122 with a larger capacity. The second overflow groove 122 opens upward, and is connected with the blind hole 11 and the first overflow groove 121.

[0037] In one embodiment, the heat equalizing block 1 is a columnar structure made of a high thermal conductivity alloy material (such as an aluminum alloy). The heat equalizing block 1 is provided with one or more blind holes 11, each blind hole 11 is correspondingly provided with a first overflow groove 121, and all blind holes 11 share a second overflow groove 122.

[0038] See also Figures 1 to 3 , the heat equalizing assembly of the present invention also includes a sealing cover 2 for sealing the open end of the blind hole 11 of the heat equalizing block 1. In one embodiment, the sealing cover 2 includes an integrally formed covering portion 21 and a coupling portion 22. In order to reduce the weight of the sealing cover 2 and increase the capacity of the overflow groove after covering, the coupling portion 22 is preferably a hollow structure; the diameter of the coupling portion 22 is smaller than the diameter of the covering portion 21, and an outer step 23 is formed at the junction of the coupling portion 22 and the covering portion 21. The outer diameter of the coupling portion 22 of the sealing cover 2 matches the inner diameter of the second overflow groove 122 of the heat equalizing block 1. When the covering portion 21 is pressed, the coupling portion 22 of the sealing cover 2 is embedded in the second overflow groove 122, so that the outer periphery of the coupling portion 22 is tightly combined with the inner wall of the second overflow groove 122, and the outer step 23 is in close contact with the top of the second overflow groove 122, thereby sealing the open end of the blind hole 11 of the heat equalizing block 1 to prevent the liquid in the blind hole 11 from overflowing.

[0039] Furthermore, an annular groove 221 is provided on the outer periphery of the joint portion 22 , and an O-ring 3 is placed in the annular groove 221 to form a sealing structure to further prevent liquid leakage.

[0040] In one embodiment, the coupling portion 22 of the sealing cover 2 is a hollow structure, and its inner diameter matches the outer diameter of the second overflow groove 122. An annular groove 221 is provided on its inner diameter. An O-ring 3 is placed in the annular groove 221 to form a sealing structure. When the covering portion 21 is pressed, the coupling portion 22 of the sealing cover 2 is fitted onto the outer wall of the second overflow groove 122, so that the inner periphery of the coupling portion 22 is tightly combined with the outer wall of the second overflow groove 122, and the top of the second overflow groove 122 is against the inner step at the junction of the coupling portion 22 and the covering portion 21 to prevent the liquid in the blind hole 11 from overflowing, thereby facilitating the storage and carrying of the heat equalizing block 1.

[0041] Furthermore, the covering portion 21 of the sealing cover 2 is symmetrically provided with a pulling groove 211 for opening the sealing cover 2. The pulling groove 211 is provided with an upper opening and a side opening that are connected to each other, forming a structure that is easy to pull. It is not connected to the cavity of the coupling portion 22. This structure is convenient for opening the sealing cover 2. For example, the hook of the pulling tool is symmetrically placed in the pulling groove 211, which can facilitate pulling the sealing cover 2 from the heat equalizing block 1.

[0042] In one embodiment, the overflow groove 12 of the heat equalizing block 1 may only have a second overflow groove 122. The volume of the second overflow groove 122 should take into account the volume of liquid overflowing when the temperature bag or the sensing end of the temperature device to be tested is inserted into the blind hole 11, and the expansion of the liquid volume when the temperature rises during calibration, so as to prevent the liquid from overflowing the second overflow groove 122.

[0043] The above components form the heat equalizing component 01 of the present invention according to the above-mentioned connection relationship. The heat equalizing block 1 of the heat equalizing component is provided with an overflow groove 12 and a blind hole 11 filled with a liquid with good thermal conductivity, so that a balanced temperature field can be formed after the temperature bag or the sensing end of the temperature device to be tested is inserted into the blind hole 11, thereby improving the inspection accuracy; a sealing cover 2 is provided for use with the heat equalizing block 1, which is used to cover and seal the open end of the blind hole 11 of the heat equalizing block 1 through the sealing cover 2 after the verification is completed, so as to prevent the liquid in the blind hole 11 from leaking, thereby facilitating the storage and carrying of the heat equalizing block 1; the annular groove 221 provided on the joint part 22 of the sealing cover 2 and the O-ring 3 placed in the annular groove are used to further increase the sealing performance of the combination of the sealing cover 2 and the heat equalizing block 1; and the pulling grooves 211 are symmetrically provided on the covering part 21 of the sealing cover 2, so as to facilitate the extraction of the heat equalizing component 01.

[0044] The present invention also provides a temperature tester 100 for testing a temperature device to be tested. Figure 4The temperature calibrator 100 includes a furnace body 102 and a temperature measurement and controller 101. A cold source 103, a heat source 104, a soaking assembly 01 (detection chamber) and a temperature sensor assembly 105 are arranged in the furnace body 102. The cold source 103, the heat source 104, the temperature sensor assembly 105 and the temperature device to be detected are electrically connected to the temperature measurement and controller 101 respectively. The temperature sensor assembly 105 is in contact with the soaking assembly 01 to sense the temperature of the soaking assembly 01 and transmit the acquired temperature signal to the temperature measurement and controller 101. The temperature measurement and controller 101 sends a control instruction to the control mechanism of the cold source 103 or the heat source 104 according to the required temperature value, so that the cold source 103 or the heat source 104 cools down or heats up the soaking assembly 01 until the temperature value acquired by the temperature sensor assembly 105 reaches a predetermined temperature, so as to realize precise temperature control. At the same time, the temperature value obtained by the temperature device under test is also transmitted to the temperature measurement and controller 101, and the temperature measurement and controller 101 processes and analyzes the obtained temperature data to realize the calibration of the temperature device under test.

[0045] The cold source 103 and the heat source 104 may be the same component, and may be switched between cooling and heating states through control.

[0046] Furthermore, the temperature tester 100 also includes a touch screen 106 electrically connected to the temperature measurement and controller 101, and the temperature measurement and controller 101 sends the acquired temperature value and the processing and analysis results to the touch screen 106 for display. The preset temperature value in the process of verifying the temperature device under test can be input through the touch screen 106, and can also be stored in the memory of the temperature measurement and controller 101 by default.

[0047] The temperature calibrator 100 provides a balanced temperature field for the calibration of the temperature device under test by setting up the heat equalization component 01, thereby achieving the purpose of on-site high-precision calibration of the temperature device under test, greatly improving the efficiency of temperature calibration and reducing the complexity of temperature calibration.

[0048] Based on the above-mentioned heat soaking assembly 01 and temperature calibrator 100, the present invention further provides a temperature calibration method, which includes the following steps:

[0049] Step 1: Place the heat-absorbing block 1 in the furnace body 102, and add a proper amount of heat-conducting liquid into the blind hole 11 of the heat-absorbing block 1; or add a proper amount of heat-conducting liquid into the blind hole 11 of the heat-absorbing block 1, and then place the heat-absorbing block 1 in the furnace body 102;

[0050] Step 2: insert the temperature package or the sensing end of the temperature device to be tested into the blind hole 11 of the corresponding heat equalizing block 1, and fill a portion of the heat-conducting liquid in the gap between the temperature package or the sensing end and the inner wall of the blind hole 11, and the rest of the heat-conducting liquid overflows into the overflow groove 12;

[0051] Step three, the temperature measurement and controller 101 controls the cold source 103 or the heat source 104 according to the preset temperature value to control the temperature in the heat block 1 at the preset temperature, and then reads the temperature values ​​measured by the temperature sensor assembly 105 and the temperature device under test.

[0052] The preset temperature value can be input through the touch display screen 106 , or pre-stored in the memory of the temperature measurement and controller 101 .

[0053] Step 4: The temperature measurement and controller 101 processes and analyzes the acquired temperature value to obtain a verification result of the temperature device under test (for example, the temperature measurement accuracy of the temperature device under test, etc.), and displays the acquired temperature value and the verification result on the touch display screen 106.

[0054] Those skilled in the art should understand that these embodiments or implementations are only used to illustrate the present invention but not to limit the scope of the present invention. Various equivalent variations and modifications made to the present invention belong to the disclosure of the present invention.

Claims

1. A heat soaking assembly, used for calibrating a temperature device under inspection on site, characterized in that: The heat-averaging block (1) is provided with a blind hole (11) for accommodating a temperature bulb or a sensing end of a temperature device to be detected, the blind hole (11) is filled with a heat-conducting liquid, and an overflow groove (12) is provided at the open end of the blind hole (11) for receiving the heat-conducting liquid overflowing when the temperature bulb or the sensing end of the temperature device to be detected is inserted into the blind hole.

2. The heat spreader assembly according to claim 1, characterized in that: The overflow groove (12) is provided with two stages, comprising a first overflow groove (121) arranged on the inner side wall of the opening end of the blind hole (11) and a second overflow groove (122) arranged on the upper edge of the opening end of the blind hole (11) and opening upward.

3. The heat spreader assembly according to claim 2, characterized in that: The first overflow groove (121) is an annular groove, and a plurality of lifting holes (13) are symmetrically arranged on the upper groove wall of the groove to facilitate placing the heat equalizing block (1) into or taking it out of the furnace body of the temperature calibrator; the capacity of the second overflow groove (122) is greater than that of the first overflow groove (121), and the bottom surface of the second overflow groove (122) is formed by extending outward from the upper edge of the opening end of the blind hole (11).

4. The heat spreader assembly according to claim 2 or 3, characterized in that: The heat equalizing block (1) is a columnar structure made of a high thermal conductivity alloy material. The heat equalizing block is provided with one or more blind holes (11), each blind hole (11) is correspondingly provided with a first overflow groove (121), and all the blind holes share a second overflow groove (122).

5. The heat spreader assembly according to any one of claims 2 to 4, characterized in that: It also includes a sealing cover (2) for sealing the blind hole opening end of the heat equalizing block (1), the sealing cover (2) includes an integrally formed covering portion (21) and a connecting portion (22), the connecting portion (22) is a hollow structure, the diameter of the connecting portion (22) is smaller than the diameter of the covering portion (21), and the outer diameter of the connecting portion (22) matches the inner diameter of the second overflow groove (122) of the heat equalizing block (1).

6. The heat spreader assembly according to claim 5, characterized in that: An annular groove (221) is provided on the outer periphery of the joint portion (22), and an O-ring (3) is placed in the annular groove to form a sealing structure.

7. The heat spreader assembly according to claim 5 or 6, characterized in that: The covering portion (21) of the sealing cover (2) is symmetrically provided with lifting grooves (211), and the lifting grooves (211) are provided with an upper opening and a side opening that are connected to each other, forming a structure that is easy to lift, and the lifting grooves (211) are not connected to the cavity of the connecting portion (22).

8. A temperature calibrator, comprising a furnace body (102) and a temperature measurement and controller (101), wherein a cold source (103), a heat source (104), a detection cavity and a temperature sensor assembly (105) are arranged in the furnace body (102), the cold source (103), the heat source (104), the temperature sensor assembly (105) and a temperature device to be detected with a temperature bag or a sensing end inserted into the detection cavity are electrically connected to the temperature measurement and controller (101), respectively, and the temperature sensor assembly (105) is in contact with the detection cavity, characterized in that: The detection chamber is the heat-saturating component (01) according to any one of claims 1 to 7.

9. The temperature calibrator according to claim 8, characterized in that: It also includes a touch display screen (106) electrically connected to the temperature measurement and controller (101).

10. A temperature calibration method, using the temperature calibration instrument according to claim 8 or 9 for operation, comprising the following steps: Step 1: placing the heat-matching block (1) into the furnace body (102), and adding a proper amount of heat-conducting liquid into the blind hole (11) of the heat-matching block (1); or adding a proper amount of heat-conducting liquid into the blind hole (11) of the heat-matching block (1), and then placing the heat-matching block (1) into the furnace body (102); Step 2: inserting the temperature bulb or the sensing end of the temperature device to be tested into the corresponding blind hole (11), filling a portion of the heat-conducting liquid in the gap between the temperature bulb or the sensing end and the inner wall of the blind hole (11), and the rest of the heat-conducting liquid overflowing into the overflow groove (12); Step 3: The temperature measurement and controller (101) controls the cold source (103) or the heat source (104) according to a preset temperature value to control the temperature in the heat equalizing block (1) to a preset temperature, and then reads the temperature values ​​measured by the temperature sensor assembly (105) and the temperature device to be detected; Step 4: The temperature measurement and controller (101) processes and analyzes the acquired temperature value to obtain a verification result of the temperature device under test, and displays the acquired temperature value and the verification result on a touch display screen (106).

Images