A cooling measuring gun for automatic temperature measuring and sampling device

Abstract

The present invention belongs to the technical field of metallurgical equipment, and relates to a cooling measuring gun for an automatic temperature measuring sampling device, including a measuring gun barrel, a jujube-shaped joint, and a paper rod connector. The tail end of the measuring gun barrel is sealed, and a cooling air inlet is provided on the measuring gun barrel, and a first cooling air outlet evenly distributed in the circumferential direction is provided on the measuring gun barrel; the jujube-shaped joint is a hollow cylinder with tapered ends and a bulge in the middle, one end of which is inserted into the measuring gun barrel, and the middle bulge is fixedly connected to the inner wall of the measuring gun barrel, and a plurality of wedge-shaped variable-section spray holes evenly distributed in the circumference are provided at the middle bulge to form a second cooling air outlet, and the other end of the jujube-shaped joint is connected to the paper rod connector. The present invention strengthens the cooling effect of the measuring gun by spraying cooling air from multiple cooling air outlets, reduces the thermal deformation of the measuring gun, prolongs the service life of the measuring gun extension rod, and reduces the production consumption and maintenance costs of the enterprise.

Description

Technical Field

[0001] The invention belongs to the technical field of metallurgical equipment and relates to a cooling measuring gun for an automatic temperature measuring and sampling device. Background Art

[0002] Metallurgical production requires temperature measurement and sampling of molten metal during the smelting process to determine the progress of metallurgical reactions. Manual temperature measurement and sampling are gradually being replaced by automatic temperature measurement and sampling devices and industrial robots. The "temperature measurement and sampling operation" of the steelmaking process generally refers to a series of operations such as temperature measurement of molten steel, oxygen determination of molten steel, hydrogen determination of molten steel, extraction of molten steel samples, extraction of slag samples, etc., which is to put a paper tube probe containing a detection element on the probe connector of the measuring gun, and hold it manually or mechanically and insert it into the high-temperature molten liquid to be detected for a short time. However, its workplace has high-temperature radiation, high-intensity light burning, high-temperature slag liquid spraying, high-concentration metal dust and other harsh environments that are harmful to human health. Advanced metallurgical production generally uses automatic devices and uses industrial robots for temperature measurement and sampling operations to replace manual operations in metallurgical production, reducing the labor intensity of workers and improving work safety.

[0003] The measuring gun is a key device of the temperature measurement sampling device. The temperature measurement sampling operation process requires the paper tube probe to be mounted on the paper rod connector of the measuring gun and then inserted into the high-temperature metal melt. Although the measuring gun has been studied in depth by technicians from all aspects, in actual metallurgical production, the paper rod connector of the measuring gun still often bends and deforms greatly due to high temperature during operation, affecting the accuracy of operation. The bending of the paper rod connector makes it difficult for metallurgical production to proceed smoothly, seriously affecting the efficiency and capacity of the steel metallurgical production line. The Chinese patent with patent publication number CN210005288U discloses a self-cooling gun for robot temperature measurement sampling, but the secondary cooler of the measuring gun uses the slit between the outer tube and the core tube to generate a supersonic jet to reduce the bending of the measuring gun due to heat. The gas path structure design of this multi-layer casing structure is relatively complex, the cooling gas injection distance is short, the cooling effect of the measuring gun is poor, and the weight of the measuring gun itself is increased.

[0004] Therefore, it is necessary to study a cooling test gun for an automatic temperature measurement and sampling device, simplify the cooling gas path structure, improve the cooling effect of the test gun, overcome the heat load during the insertion of the test gun into the high-temperature melt, reduce the bending deformation of the paper rod connector, and improve the success rate and reliability of the temperature measurement and sampling operation. It can also reduce the weight of the test gun itself, reduce the static load and dynamic load of the automatic temperature measurement and sampling device, thereby realizing the miniaturization of the automatic temperature measurement and sampling device and further reducing the user's use cost. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a cooling measuring gun for an automatic temperature measurement and sampling device, which simplifies the cooling gas path structure, sets multiple cooling gas nozzles, strengthens the cooling effect of the measuring gun, further reduces the bending deformation of the extension rod, improves the success rate and reliability of the temperature measurement and sampling operation, and realizes safe and accurate temperature measurement and sampling.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A cooling measuring gun for an automatic temperature measuring sampling device comprises a measuring gun barrel, a jujube-shaped joint and a paper rod connector, wherein the tail end of the measuring gun barrel is sealed, a cooling air inlet is provided on the measuring gun barrel, and a first cooling air outlet is provided on the measuring gun barrel which is evenly distributed in the circumferential direction;

[0008] The jujube-shaped joint is a hollow cylinder with tapered ends and a bulge in the middle, one end of which is inserted into the barrel of the measuring gun, and the middle bulge is fixedly connected to the inner wall of the barrel of the measuring gun. A number of wedge-shaped variable-section spray holes evenly distributed around the circumference are arranged at the middle bulge to form a second cooling air outlet, and the other end of the jujube-shaped joint is connected to a paper rod connector.

[0009] Furthermore, the gun barrel includes a first pipe section and a second pipe section connected in sequence, the tail end of the first pipe section is sealed, the cooling air inlet and the first cooling air outlet are both arranged on the first pipe section, one end of the jujube-shaped joint passes through the second pipe section and is inserted into the first pipe section, and the middle protrusion is fixedly connected to the inner wall of the second pipe section.

[0010] Furthermore, the middle protrusion is fixedly connected to the inner wall of the second pipe section by intermittent welding to form a second cooling air outlet, and the second pipe section is a trumpet-shaped pipe, and the end away from the first pipe section is a large-diameter end.

[0011] Furthermore, the first cooling air outlet is a circular hole penetrating the barrel of the measuring gun, and the circular hole is located between the cooling air inlet and the second cooling air outlet.

[0012] Furthermore, the paper rod connector is connected to the front end of the jujube-shaped joint through a clamping nut, and the clamping nut is sleeved on the jujube-shaped joint and the paper rod connector. At least one cooling air groove is provided at the connection between the paper rod connector and the clamping nut and the jujube-shaped joint. The cooling air groove cooperates with the inner wall of the clamping nut and the jujube-shaped joint to form a third cooling air outlet.

[0013] Furthermore, the paper rod connector includes a positioning connection nozzle, a hollow extension rod and a probe connector connected to the hollow extension rod. The positioning connection nozzle is sleeved on one end of the hollow extension rod close to the jujube-shaped joint for connecting the jujube-shaped joint, and at least one cooling air groove is provided on the outer edge of the positioning connection nozzle.

[0014] Furthermore, the clamping nut is threadedly connected to the jujube-shaped joint and is abuttingly connected to the positioning connection nozzle.

[0015] Furthermore, the connection surface between the positioning connection nozzle and the clamping nut is a conical surface, and the outer diameter of the side close to the jujube-shaped joint is larger than the outer diameter of the side close to the hollow extension rod.

[0016] Furthermore, the cooling test gun also includes a gun body connecting plate and a cooling gas quick connector, wherein the gun body connecting plate is fixedly connected to the test gun barrel, and the cooling gas quick connector is connected through the test gun barrel as a cooling gas inlet.

[0017] Furthermore, the cooling test gun also includes a test gun cable for transmitting electrical signals. The test gun cable is located in the test gun barrel and includes a cable body and a female end of a cable connector. The female end of the cable connector is arranged in a jujube-shaped joint, one end of which is connected to the cable body, and the other end is connected to the male end of the cable connector arranged on the end of the paper rod connector to realize the transmission of electrical signals between the test gun barrel and the paper rod connector.

[0018] Furthermore, a positioning notch is provided on the inner wall of the front end of the jujube-shaped joint, and a circumferential stop pin matching the positioning notch is provided on the paper rod connector to limit the rotation of the paper rod connector.

[0019] Furthermore, the cooling measuring gun is connected to the automatic temperature measuring sampling device through the gun body connecting plate, the measuring gun cable and the displacement sensor are electrically connected to the automatic temperature measuring sampling device, and the cooling gas quick connector is connected to the cooling gas hose of the automatic temperature measuring sampling device.

[0020] The beneficial effects of the present invention are:

[0021] 1. The present invention provides a cooling test gun for an automatic temperature measurement and sampling device. The cooling gas ejected through multiple cooling gas outlets strengthens the cooling effect of the test gun, reduces the thermal deformation of the test gun, prolongs the service life of the extension rod of the test gun, and reduces the production consumption and maintenance costs of the enterprise. In addition, the cooling gas nozzle of the test gun device relies on the test gun barrel of the test gun as a cooling gas channel without the need to add an additional refrigeration channel, which greatly reduces the weight of the test gun itself, thereby reducing the dynamic load and static load of the automatic temperature measurement and sampling device, facilitating the miniaturization of the automatic temperature measurement and sampling device, and reducing the production and manufacturing costs.

[0022] 2. The cooling measuring gun for the automatic temperature measuring and sampling device provided by the present invention can be directly installed on various automatic temperature measuring and sampling devices for high-temperature melts, such as the automatic temperature measuring and sampling device for the molten iron desulfurization station, the automatic temperature measuring and sampling device for the auxiliary gun of the converter, the automatic temperature measuring and sampling device for the LF refining furnace, the automatic temperature measuring and sampling device for the RH vacuum furnace, and the automatic temperature measuring and sampling device for the electric furnace, through the gun body connecting plate. It can replace the original measuring gun to perform temperature measurement, sampling, oxygen determination and other operations in a high-temperature environment, avoid manual detection in a high-temperature environment, and prevent the occurrence of safety accidents. It has broad application prospects.

[0023] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0025] Figure 1 It is a structural schematic diagram of a cooling measuring gun for an automatic temperature measuring sampling device in an embodiment;

[0026] Figure 2 It is a partial structural schematic diagram of a cooling measuring gun for an automatic temperature measuring sampling device in an embodiment;

[0027] Figure 3 It is a schematic diagram of the structure of the gun body of the gun tester in the embodiment;

[0028] Figure 4 for Figure 1 The first 3D structure diagram of A in the middle;

[0029] Figure 5 for Figure 1 A second 3D structure diagram of middle A;

[0030] Figure 6 for Figure 2 Schematic diagram of the structure of B;

[0031] Figure 7 for Figure 3 A partial cross-sectional view of CC in FIG.

[0032] Figure 8 It is a structural schematic diagram of a paper rod connector in an embodiment;

[0033] Fig. 9 This is a diagram showing the use status of a cooling measuring gun for an automatic temperature measuring and sampling device in an embodiment.

[0034] Figure numerals: measuring gun cable 1, cable body 101, cable connector female end 102, cable connector male end 103, measuring gun body 2, gun body connecting plate 3, first cooling air outlet 4, measuring gun barrel 5, first pipe section 51, second pipe section 52, second cooling air outlet 6, jujube-shaped joint 7, wedge-shaped variable cross-section spray hole 701, third cooling air outlet 8, paper rod connector 9, cooling air quick connector 10, tightening nut 11, hollow extension rod 12, positioning connecting nozzle 13, circumferential stop pin 14, probe connector 15, cooling air slot 16, trolley 17, trolley track 18, cooling air hose 19. DETAILED DESCRIPTION

[0035] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0036] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0037] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is 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 operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] The tail end and the front end described in this embodiment are based on the distance from the molten metal liquid surface in the furnace, the end close to the liquid surface is the front end, and the end away from the liquid surface is the tail end.

[0039] See also Figures 1 to 8, is a cooling measuring gun for an automatic temperature measuring sampling device, comprising a measuring gun barrel 5, a jujube-shaped joint 7 and a paper rod connector 9, the tail end of the measuring gun barrel 5 is sealed, and a cooling air inlet is provided on the measuring gun barrel 5, and a first cooling air outlet 4 evenly distributed in the circumferential direction is provided on the measuring gun barrel 5; the jujube-shaped joint 7 is a hollow cylinder with tapered ends and a protrusion in the middle, one end of which is inserted into the measuring gun barrel 5, and the middle protrusion is fixedly connected to the inner wall of the measuring gun barrel 5, and a plurality of wedge-shaped variable-section spray holes 701 evenly distributed in the circumference are provided at the middle protrusion to form a second cooling air outlet 6, the other end of the jujube-shaped joint 7 is connected to the paper rod connector 9, and the cooling air sprayed from the second cooling air outlet 6 cools the paper rod connector 9 and the jujube-shaped joint 7.

[0040] In this embodiment, the first cooling air outlet 4 is located between the cooling air inlet and the second cooling air outlet 6 . The first cooling air outlet 4 is a circular hole penetrating the measuring gun barrel 5 . The first cooling air outlet 4 ejects circumferential cooling gas for cooling the measuring gun barrel 5 .

[0041] Preferably, the measuring gun comprises a first pipe section 51 and a second pipe section 52 connected in sequence, the tail end of the first pipe section 51 is sealed, the cooling air inlet and the first cooling air outlet 4 are both arranged on the first pipe section 51, one end of the jujube-shaped joint 7 passes through the second pipe section 52 and is inserted into the first pipe section 51, and the middle protrusion is fixedly connected to the inner wall of the second pipe section 52, the middle protrusion is fixedly connected to the inner wall of the second pipe section 52 by intermittent welding to form a second cooling air outlet 6, the second pipe section 52 is a trumpet-shaped pipe, and the end away from the first pipe section 51 is a large-diameter end. The structure of this trumpet-shaped pipe further expands the air outlet area of ​​the second cooling air outlet 6, thereby improving the cooling effect.

[0042] Specifically, the gun barrel 5 is a single hollow metal tube with a length of 5m to 8m, which is used to extend the paper rod connector 9 to a specified spatial position, protect the gun cable 1 and serve as a cooling air channel. The jujube-shaped joint 7 is a hollow cylinder with tapered ends and a convex middle. The wedge-shaped variable cross-section spray hole 701 is formed by cutting off a number of wedge-shaped variable cross-section planes evenly distributed on the outer edge of the jujube-shaped joint 7. In this embodiment, the wedge-shaped variable cross-section spray holes 701 are set to 4.

[0043] The paper rod connector 9 includes a positioning connection nozzle 13, a hollow extension rod 12 and a probe connector 15 connected to the hollow extension rod 12 at one end away from the measuring gun barrel 5. The positioning connection nozzle 13 is sleeved on the end of the hollow extension rod 12 close to the jujube-shaped joint 7 for connecting the clamping nut 11. The positioning connection nozzle 13 is fixed to the hollow extension rod 12 by welding, and at least one cooling air groove 16 is provided on the outer edge of the positioning connection nozzle 13. The paper rod connector 9 is connected to the front end of the jujube-shaped joint 7 through the clamping nut 11. The clamping nut 11 is sleeved on the jujube-shaped joint 7 and the positioning connection nozzle 13. At least one cooling air groove 16 is provided at the connection between the paper rod connector 9 and the clamping nut 11 and the jujube-shaped joint 7. The cooling air groove 16 cooperates with the inner wall of the clamping nut 11 to form a third cooling air outlet 8. In this embodiment, a total of 4 cooling air grooves 16 are provided, which are evenly distributed on the circumference of the positioning connection nozzle 13.

[0044] The above-mentioned paper rod connector 9 can be any existing paper rod connector, which is used to connect the paper tube probe, wherein the hollow extension rod 12 is used to accommodate the signal transmission cable, and is detachably connected to the probe connector 15, and the probe connector 15 is used to connect the paper tube probe. The key lies in the positioning connection nozzle 13 welded with the hollow extension, and the end of the positioning connection nozzle 13 close to one end of the jujube-shaped joint 7 is fixed with a cable connector male end 103, and the outer surface of the positioning connection nozzle 13 has a conical surface that fits with the inner surface conical surface of the clamping nut 11 and is pressed and positioned on the jujube-shaped joint 7, and a cooling air groove 16 is provided on the outer edge of the positioning connection nozzle 13, and the center line of the cooling air groove 16 is parallel to the axis of the paper rod connector 9, and is connected to the inner cavity of the jujube-shaped joint 7, and then matches the inner wall of the clamping nut 11 to form a third cooling air outlet 8, and the cooling air sprayed through the third cooling air outlet 8 cools the paper rod connector 9 to prevent it from thermal deformation.

[0045] The clamping nut 11 is a cup-shaped nut, which is threadedly connected to the outer edge of the jujube-shaped joint 7 and is in contact with the positioning connection nozzle 13. The positioning connection nozzle 13 is a stepped sleeve, and the connecting surface between the positioning connection nozzle 13 and the clamping nut 11 is a conical surface, and the outer diameter of the side close to the jujube-shaped joint 7 is larger than the outer diameter of the side close to the hollow extension rod 12. The clamping nut 11 is continuously tightened with the jujube-shaped joint 7, so that the stepped surface of the positioning connection nozzle 13 is pressed against the jujube-shaped joint 7, thereby realizing the connection between the paper rod connector 9 and the jujube-shaped joint 7.

[0046] The inner wall of the front end of the jujube-shaped joint 7 is provided with a positioning notch, and one end of the positioning connection nozzle 13 inserted into the jujube-shaped joint 7 is provided with a circumferential stop pin 14 matching the positioning notch to limit the rotation of the paper rod connector 9.

[0047] The measuring gun barrel 5 also includes a gun body connecting plate 3 and a cooling gas quick connector 10. The gun body connecting plate 3 is fixedly connected to the measuring gun barrel 5. One end of the cooling gas quick connector 10 penetrates and is welded on the measuring gun barrel 5 as a cooling gas inlet, and the other end is connected to a cooling gas hose 19 of an automatic temperature measurement and sampling device to transport cooling gas into the measuring gun barrel 5. The measuring gun barrel 5 also includes a measuring gun cable 1 for transmitting electrical signals. The measuring gun cable 1 is located in the measuring gun barrel 5, and includes a cable body 101 and a cable connector female end 102. The cable connector female end 102 is arranged in the jujube-shaped connector 7, one end of which is connected to the cable body 101, and the other end is connected to a cable connector male end 103 arranged on the paper rod connector 9 near one end of the jujube-shaped connector 7, so as to realize the transmission of electrical signals between the measuring gun barrel 5 and the paper rod connector 9.

[0048] Preferably, the male end 103 of the cable connector is fixedly connected to the end of the positioning connection nozzle 13 .

[0049] See also Fig. 9 In this embodiment, the gun body connecting plate 3 on the gun barrel 5 directly connects the enhanced cooling gun to the lifting trolley 17 of the automatic temperature measurement and sampling device. The cooling gas hose 19 delivers the cooling gas to the cooling gas quick connector 10 on the gun barrel 5 as the cooler inlet of the gun barrel 5. The gun cable 1 passes through the cable outlet at the rear of the gun assembly (the gun cable 1 and the cable outlet are sealed) and is connected to the temperature measuring instrument. The probe connector is connected to one of the operating accessories such as the temperature measuring probe, the oxygen determination probe, and the sampler probe. The lifting trolley 17 moves up and down along the track to directly insert and pull out the probe into the high-temperature molten metal to complete the process operation; the cooling gas is connected to the gun body assembly through the hose, and the gas ejected from the first cooling gas outlet 4 cools the gun body, and the gas ejected from the second cooling gas outlet 6 and the third cooling gas outlet 8 enhances the cooling of the paper rod connector 9 and the probe pulled out from the high-temperature molten metal, and quickly cools down to reduce the high-temperature thermal deformation of the paper rod connector 9 (hollow extension rod 12).

[0050] The cooling measuring gun in this embodiment replaces the manual temperature measurement and sampling operation in front of the furnace with automatic temperature measurement, thereby avoiding casualties caused by converter splashing, improving the safety of electric furnace production, and strengthening cooling through multiple cooling air outlets, greatly reducing the high-temperature thermal deformation of the paper rod connector 9, thereby ensuring the high consistency of the probe insertion point position and the measuring point depth in metallurgical operations, ensuring the success rate of automatic temperature measurement and sampling, avoiding interference with the effectiveness and reliability of the steelmaking model due to quality problems of temperature measurement and sampling data, and cooperating with the steelmaking model to realize automated steelmaking. In addition, since the high-temperature thermal deformation of the paper rod connector 9 is small, the equipment maintenance amount is reduced, the service life of the hollow extension rod 12 is extended, the production consumption is reduced, and the production cost is saved. It can replace manual safe and accurate temperature measurement and sampling of molten steel, thereby achieving intelligent, economical, one-button automatic steelmaking, and has broad application prospects.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A cooling measuring gun for an automatic temperature measuring sampling device, characterized in that: The invention comprises a gun barrel (5), a jujube-shaped joint (7) and a paper rod connector, wherein the rear end of the gun barrel (5) is sealed, a cooling air inlet is provided on the gun barrel (5), and a first cooling air outlet (4) is evenly distributed in the circumferential direction on the gun barrel (5); The jujube-shaped joint (7) is a hollow cylinder with conical ends and a protrusion in the middle, one end of which is inserted into the measuring gun barrel (5), and the protrusion in the middle is fixedly connected to the inner wall of the measuring gun barrel (5), and a plurality of wedge-shaped variable-section spray holes (701) evenly distributed around the circumference are arranged at the protrusion in the middle to form a second cooling air outlet (6), and the other end of the jujube-shaped joint (7) is connected to a paper rod connector; The wedge-shaped variable cross-section spray hole (701) is formed by cutting off a number of wedge-shaped variable cross-section planes evenly distributed around the outer edge of the jujube-shaped joint (7), and the middle protrusion of the jujube-shaped joint (7) is intermittently welded to the inner wall of the measuring gun barrel (5) to form a second cooling air outlet (6).

2. The cooling measuring gun for the automatic temperature measuring sampling device according to claim 1, characterized in that: The gun barrel (5) comprises a first pipe section (51) and a second pipe section (52) which are connected in sequence, the tail end of the first pipe section (51) is sealed, the cooling air inlet and the first cooling air outlet (4) are both arranged on the first pipe section (51), one end of the jujube-shaped joint (7) passes through the second pipe section (52) and is then inserted into the first pipe section (51), and the middle protrusion is fixedly connected to the inner wall of the second pipe section (52).

3. The cooling measuring gun for the automatic temperature measuring sampling device according to claim 2, characterized in that: The middle protrusion is fixedly connected to the inner wall of the second pipe section (52) by intermittent welding to form a second cooling air outlet (6), and the second pipe section (52) is a trumpet-shaped pipe, and the end away from the first pipe section (51) is a large-diameter end.

4. The cooling measuring gun for the automatic temperature measuring and sampling device according to claim 1, characterized in that: The first cooling air outlet (4) is a circular hole penetrating the gun barrel (5), and the circular hole is located between the cooling air inlet and the second cooling air outlet (6).

5. The cooling measuring gun for the automatic temperature measuring and sampling device according to claim 1, characterized in that: The paper rod connector is connected to the front end of the jujube-shaped joint (7) via a clamping nut (11), and the clamping nut (11) is sleeved on the jujube-shaped joint (7) and the paper rod connector. At least one cooling air slot (16) is provided at the connection between the paper rod connector and the clamping nut (11) and the jujube-shaped joint (7). The cooling air slot (16) cooperates with the inner wall of the clamping nut (11) and the jujube-shaped joint (7) to form a third cooling air outlet (8).

6. The cooling measuring gun for the automatic temperature measuring and sampling device according to claim 5, characterized in that: The paper rod connector comprises a positioning connection nozzle (13), a hollow extension rod (12), and a probe connector (15) connected to the hollow extension rod (12); the positioning connection nozzle (13) is sleeved on one end of the hollow extension rod (12) close to the jujube-shaped joint (7) for connecting to the jujube-shaped joint (7); and at least one cooling air slot (16) is provided on the outer edge of the positioning connection nozzle (13).

7. The cooling measuring gun for the automatic temperature measuring and sampling device according to claim 6, characterized in that: The compression nut (11) is threadedly connected to the jujube-shaped joint (7) and is abuttingly connected to the positioning connection nozzle (13).

8. The cooling measuring gun for the automatic temperature measuring and sampling device according to claim 7, characterized in that: The connection surface between the positioning connection nozzle (13) and the compression nut (11) is a conical surface, and the outer diameter of the side close to the jujube-shaped joint (7) is larger than the outer diameter of the side close to the hollow extension rod (12).

9. The cooling measuring gun for the automatic temperature measuring sampling device according to claim 1, characterized in that: The cooling test gun further comprises a gun body connecting plate (3) and a cooling gas quick connector (10), wherein the gun body connecting plate (3) is fixedly connected to the test gun barrel (5), and the cooling gas quick connector (10) is connected through the test gun barrel (5) to serve as a cooling gas inlet.

10. The cooling measuring gun for the automatic temperature measuring sampling device according to claim 1, characterized in that: The cooling test gun further comprises a test gun cable (1) for transmitting electrical signals. The test gun cable (1) is located in the test gun barrel (5) and comprises a cable body (101) and a cable connector female end (102). The cable connector female end (102) is arranged in the jujube-shaped joint (7), one end of which is connected to the cable body (101) and the other end of which is connected to a cable connector male end (103) arranged on the end of the paper rod connector, so as to realize electrical signal transmission between the test gun barrel (5) and the paper rod connector.

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