Blackbody temperature calibrator for infrared radiation thermometer

Abstract

The black body temperature calibrator comprises a graphite tube, a partition cavity bottom is arranged in the graphite tube, the graphite tube is divided into a first cavity and a second cavity by the partition cavity bottom, and both the first cavity and the second cavity are opened outwards; the two ends of the graphite pipe are connected with conductive metal blocks, and water circulation heat dissipation structures are arranged on the conductive metal blocks. The graphite pipe is sleeved with a quartz pipe, the two ends of the quartz pipe are connected with the water circulation heat dissipation structures on the corresponding sides in a sealed mode respectively, and a heat insulation cavity is defined by the quartz pipe, the graphite pipe and the water circulation heat dissipation structures. A first air inlet hole and a second air inlet hole are formed in the graphite pipe; a gas conveying pipe for conveying argon to the heat insulation cavity is arranged on the water circulation heat dissipation structure; a heat preservation structure is arranged between the graphite tube and the quartz tube; a standard radiation thermometer for monitoring the temperature of the bottom of the partition cavity is mounted at the opening of the first cavity; heat dissipation of the end part of the blackbody radiation source is realized to ensure that the temperature of a measured part meets test requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to thermometer calibration technical field especially relates to a blackbody temperature calibrator for infrared radiation thermometer. BACKGROUND

[0002] Blackbody radiation source is an object or device that can produce blackbody radiation, mainly used for calibrating the temperature measurement accuracy of infrared radiation thermometer. By using infrared radiation thermometer or other some radiation blackbody measuring instrument and the temperature of blackbody cavity to test, compare, realize to infrared radiation thermometer and some other measuring instrument carry out calibration.

[0003] The research of blackbody radiation source can be divided into three aspects: blackbody cavity and structure design; The calculation of cavity effective emissivity and the realization of temperature uniformity; The evaluation of blackbody radiation source.

[0004] Two aspects that determine the performance of blackbody radiation source are the shape and airtightness of blackbody radiation source cavity and the uniformity of blackbody radiation source temperature distribution; The former describes the degree of deviation of the whole radiation source from the ideal blackbody radiation source, and the latter determines the degree of deviation of the radiation source from the ideal blackbody radiation spectrum.

[0005] Blackbody radiation source mainly ensures that the temperature of the measurement part meets the test requirements, and the two end parts as the conductive connection parts need to ensure good heat dissipation effect and stable conductivity. CONTENT OF THE UTILITY MODEL

[0006] The utility model discloses a blackbody temperature calibrator for infrared radiation thermometer, realizes blackbody radiation source end part heat dissipation and guarantees that the temperature of the measurement part meets the test requirements.

[0007] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] A blackbody temperature calibrator for infrared radiation thermometer, including graphite pipe, be equipped with the bottom of the partition chamber in graphite pipe, the bottom of the partition chamber divide graphite pipe into first cavity and second cavity, first cavity with Second cavity all open outward; The both ends of graphite pipe are connected with conductive metal block, and the water circulation heat dissipation structure is equipped on the conductive metal block; The quartz tube is sleeved on the graphite pipe, and the both ends of the quartz tube are respectively sealed with the water circulation heat dissipation structure of corresponding side, and the quartz tube, graphite pipe and water circulation heat dissipation structure enclose and constitute heat insulation chamber; First air inlet hole that links first cavity and second air inlet hole that links second cavity are seted up on the graphite pipe, and the gas conveying pipe that transports argon to heat insulation chamber is equipped on water circulation heat dissipation structure; The heat preservation structure is equipped between graphite pipe and quartz tube;The opening of first cavity is installed with standard radiation thermometer for monitoring the temperature of the bottom of the partition chamber.

[0009] Preferably, the partition cavity bottom comprises an integrally formed cylindrical section and a conical section, the tip of the conical section extending towards the first cavity side.

[0010] Preferably, the heat preservation structure comprises a graphite paper attached to the inner wall of the quartz tube, and the space between the graphite paper and the graphite tube is filled with graphite cotton.

[0011] Preferably, the water circulation heat dissipation structure comprises a heat dissipation block, the heat dissipation block is provided with a first stepped structure for mounting the conductive metal block and a second stepped structure for sealingly connecting the quartz tube; a circulation cavity is formed in the heat dissipation block, the circulation cavity is arranged around the first stepped structure, and the heat dissipation block is provided with a water inlet pipe and a water outlet pipe communicating with the circulation cavity; the gas inlet pipe is connected to the heat dissipation block and communicates with the first stepped structure.

[0012] Preferably, the first stepped structure is a stepped blind hole.

[0013] Preferably, the first stepped structure is a stepped hole, and the heat dissipation block is provided with a sealing plate for sealing the small hole of the stepped hole.

[0014] Preferably, the partition cavity bottom is integrally formed with the graphite tube.

[0015] Preferably, the conductive metal block is connected to a direct current power supply, the conduction current of the direct current power supply is 160 A, and the control temperature instrument for controlling the direct current power supply is further included.

[0016] Beneficial effects:

[0017] By arranging the conductive metal blocks at both ends of the graphite tube, the entire graphite tube is heated after being conductive, and the partition cavity bottom has the most stable heating temperature. The temperature of the partition cavity bottom is measured from the first cavity side by a standard radiation thermometer to adjust the heating temperature of the entire graphite tube to meet the test requirements. After reaching the temperature, the calibrated infrared radiation thermometer measures the temperature of the partition cavity bottom from the second cavity side. The calibrated infrared radiation thermometer measures the temperature of the partition cavity bottom from the second cavity side. The actual temperature difference between the measured temperature and the actual temperature of the partition cavity bottom is compared and calibrated.

[0018] During the heating of the graphite tube, the part connecting the conductive metal blocks needs to be effectively cooled to ensure good conductivity. The water circulation heat dissipation structure is arranged to achieve good heat dissipation of the conductive metal blocks at both ends. At the same time, the quartz tube forms a heat insulation cavity with the graphite tube, and high-purity argon gas is transported into the heat insulation cavity through the gas inlet pipe to enter the first cavity and the second cavity through the first gas inlet hole and the second gas inlet hole to discharge the internal air, thereby avoiding oxidation of the graphite tube and prolonging the service life. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1The cross-sectional structure schematic view of the embodiment of the utility model;

[0020] Figure 2 The cross-sectional structure schematic view of the graphite pipe in the embodiment of the utility model;

[0021] Figure 3 The three-dimensional structure schematic view of the water circulation heat dissipation structure in the embodiment of the utility model;

[0022] Figure 4 The cross-sectional structure schematic view of the water circulation heat dissipation structure in the embodiment of the utility model;

[0023] In Figures 1 to 4 In the embodiment of the utility model, the correspondence between the component name or line and the figure number is as follows:

[0024] Graphite pipe 1, partition cavity bottom 2, cylindrical section 21, conical section 22, first cavity 3, second cavity 4, conductive metal block 5, water circulation heat dissipation structure 6, heat dissipation block 61, first step structure 62, second step structure 63, circulation cavity 64, water inlet pipe 65, water outlet pipe 66, quartz pipe 7, first air inlet 8, second air inlet 9, gas conveying pipe 10, heat insulation cavity 11. Specific implementation

[0025] The technical scheme in the embodiment of the utility model will be clearly and completely described below in combination with the drawings in the embodiment of the utility model, and obviously, the described embodiment is only a part of the embodiments of the utility model, rather than all the embodiments.

[0026] Referring to Figures 1-4 The embodiment of the utility model proposes a blackbody temperature calibrator for infrared radiation thermometer, which comprises a graphite pipe 1, a partition cavity bottom 2 is arranged in the graphite pipe 1, the partition cavity bottom 2 divides the graphite pipe 1 into a first cavity 3 and a second cavity 4, the first cavity 3 and the second cavity 4 are both outwardly open, wherein the partition cavity bottom 2 comprises an integrally formed cylindrical section 21 and a conical section 22, the tip of the conical section 22 extends to the side of the first cavity 3, and the entire partition cavity bottom 2 is integrally formed with the graphite pipe 1, so that the temperature of the tip of the conical section 22 of the partition cavity bottom 2 is stable when the graphite pipe 1 is heated to a predetermined temperature, and therefore the temperature measurement is mainly performed on the partition cavity bottom 2.

[0027] The graphite pipe 1 starts to heat after being conductive, conductive metal blocks 5 are connected to both ends of the graphite pipe 1, the graphite pipe 1 is conductively heated through the conductive metal blocks 5, the conductive metal blocks 5 are connected to a direct current power supply, the conduction current of the direct current power supply is 160 A, a temperature control instrument is further arranged for controlling the direct current power supply, the temperature control instrument mainly controls the direct current power supply, so that the current adjustment and temperature adjustment are satisfied, and the parts related to the power supply circuit are all adopted in the prior art.

[0028] In the heating process, generally 600-3000℃ will be reached, the need to conductive metal block 5 heat dissipation, avoid the influence of the heating temperature of the graphite tube 1 caused by the change of the conductive stability, therefore, in the conductive metal block 5 is provided with water circulation cooling structure 6, the conductive metal block 5 to achieve good heat dissipation.

[0029] In the graphite tube 1 after heating, the need for temperature holding, also need to send high purity argon to the inside to discharge the air in the first cavity 3 and the second cavity 4, avoid the graphite tube 1 oxidation, specific in the graphite tube 1 is sleeved with quartz tube 7, the both ends of the quartz tube 7 are respectively sealed with the water circulation cooling structure 6 of the corresponding side, the quartz tube 7, the graphite tube 1 and water circulation cooling structure 6 are enclosed to form a heat insulation cavity 11, the heat insulation cavity 11 can be heat insulation, at the same time convenient for the delivery of argon, specific in the graphite tube 1 is provided with first gas inlet hole 8 and second gas inlet hole 9 which are communicated with the first cavity 3 and the second cavity 4 respectively, the water circulation cooling structure 6 is provided with gas supply pipe 10 which is used for conveying argon to the heat insulation cavity 11, after the argon is conveyed into the heat insulation cavity 11 through the gas supply pipe 10, the first gas inlet hole 8 and the second gas inlet hole 9 are used to convey the argon into the first cavity 3 and the second cavity 4 respectively, so as to discharge the air in the whole graphite tube 1.

[0030] At the same time, the heat preservation structure is arranged between the graphite tube 1 and the quartz tube 7, which can heat the graphite tube 1 and insulate the quartz tube 7.

[0031] At the same time, the standard radiation thermometer is installed at the opening of the first cavity 3 and used for monitoring the temperature of the partition cavity bottom 2, so as to detect the temperature of the partition cavity bottom 2 and adjust the actual heating temperature of the partition cavity bottom 2 to the preset temperature.

[0032] Specifically, when the thermometer is calibrated, the infrared radiation thermometer is used to measure the temperature of the partition cavity bottom 2 from the second cavity 4 side to obtain the first measurement value, the temperature difference is obtained by comparing the first measurement value with the actual temperature value of the partition cavity bottom 2, and the infrared radiation thermometer is calibrated based on the temperature difference.

[0033] Specifically, the heat preservation structure mainly meets the heat preservation and heat insulation, and also needs to meet the gas flow in the heat insulation cavity 11, so the heat preservation structure includes the graphite paper attached to the inner wall of the quartz tube 7, and the graphite cotton is filled between the graphite paper and the graphite tube 1.

[0034] The conductive metal block 5 is well cooled by the water circulation cooling structure 6, and the water circulation cooling structure 6 comprises a cooling block 61, the first step structure 62 for mounting the conductive metal block 5 and the second step structure 63 for sealingly connecting the quartz tube 7 are arranged on the cooling block 61, the conductive metal block 5 is mounted through the first step structure 62 and can communicate with the heat insulation cavity 11, and the quartz tube 7 is sealingly connected with the second step structure 63; a circulating cavity 64 is arranged in the cooling block 61, the circulating cavity 64 is arranged around the first step structure 62, the water inlet pipe 65 and the water outlet pipe 66 for communicating with the circulating cavity 64 are arranged on the cooling block 61, and water mainly flows in the circulating cavity 64, so that the conductive metal block 5 is cooled by heat exchange, and the gas conveying pipe 10 is connected to the cooling block 61 and communicates with the first step structure 62, so that the water circulation and the gas flow are separated.

[0035] In an embodiment, the first step structure 62 is a step blind hole, and the gas enters the heat insulation cavity 11 from the first step structure 62.

[0036] In another embodiment, the first step structure 62 is a step hole, and a sealing plate for sealing the small hole of the step hole is arranged on the cooling block 61, the through step hole is convenient for mounting operation, but needs to be sealed, and the small hole of the step hole is sealed by the sealing plate, so that the gas enters the heat insulation cavity 11 from the first step structure 62.

[0037] In the utility model, unless there is definite stipulation and limitation, the terms "mount", "connect", "fix", and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawing, or the orientation or position relationship commonly placed when the utility model product is used, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, so it cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0039] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A blackbody temperature calibrator for an infrared radiation thermometer, characterized by: The graphite tube (1) is internally provided with a partitioned cavity bottom (2), which divides the graphite tube (1) into a first cavity (3) and a second cavity (4), and both the first cavity (3) and the second cavity (4) are outwardly open. Both ends of the graphite tube (1) are connected with conductive metal blocks (5), and the conductive metal blocks (5) are provided with water circulation heat dissipation structures (6). A quartz tube (7) is sleeved on the graphite tube (1), both ends of the quartz tube (7) are sealingly connected with the water circulation heat dissipation structures (6) on the corresponding side, and the quartz tube (7), the graphite tube (1) and the water circulation heat dissipation structures (6) enclose a heat insulation cavity (11). First air inlet holes (8) communicating with the first cavity (3) and second air inlet holes (9) communicating with the second cavity (4) are formed in the graphite tube (1), and the water circulation heat dissipation structures (6) are provided with gas conveying pipes (10) conveying argon to the heat insulation cavity (11). A heat preservation structure is arranged between the graphite tube (1) and the quartz tube (7). A standard radiation thermometer for monitoring the temperature of the partitioned cavity bottom (2) is mounted at the opening of the first cavity (3).

2. A blackbody temperature calibrator for an infrared radiation thermometer according to claim 1, characterized in that: The partitioned cavity bottom (2) comprises an integrally formed cylindrical section (21) and a conical section (22), and the tip of the conical section (22) extends towards the first cavity (3) side.

3. A blackbody temperature calibrator for an infrared radiation thermometer according to claim 2, characterized in that: The heat preservation structure comprises graphite paper attached to the inner wall of the quartz tube (7), and graphite cotton is filled between the graphite paper and the graphite tube (1).

4. A blackbody temperature calibrator for an infrared radiation thermometer according to any one of claims 1 to 3, characterized in that: The water circulation heat dissipation structure (6) comprises a heat dissipation block (61), the heat dissipation block (61) is provided with a first stepped structure (62) for mounting the conductive metal block (5) and a second stepped structure (63) sealingly connecting the quartz tube (7); A circulating cavity (64) is formed in the heat dissipation block (61), the circulating cavity (64) is annularly arranged on the first stepped structure (62), and the heat dissipation block (61) is provided with a water inlet pipe (65) and a water outlet pipe (66) communicating with the circulating cavity (64); The gas conveying pipe (10) is connected to the heat dissipation block (61) and communicates with the first stepped structure (62).

5. A blackbody temperature calibrator for an infrared radiation thermometer according to claim 4, characterized in that: The first stepped structure (62) is a stepped blind hole.

6. A blackbody temperature calibrator for an infrared radiation thermometer according to claim 4, characterized in that: The first stepped structure (62) is a stepped hole, and the heat dissipation block (61) is provided with a sealing plate sealing the small hole of the stepped hole.

7. A blackbody temperature calibrator for an infrared radiation thermometer according to claim 2, characterized in that: The partitioned cavity bottom (2) and the graphite tube (1) are integrally formed.

8. A blackbody temperature calibrator for an infrared radiation thermometer according to claim 4, characterized in that: The conductive metal block (5) is connected with a direct current power supply, the conduction current of the direct current power supply is 160 A, and a temperature control instrument for controlling the direct current power supply is further included.

Images