A trolley type heat treatment furnace temperature testing device and use method thereof

Abstract

The present invention provides a furnace temperature testing device for a trolley-type heat treatment furnace and a method for using the same. The furnace temperature testing device includes: a thermocouple, a fixed unit, a movable bracket and a sensor unit. The hot end of the thermocouple is fixed on the movable bracket, and the cold end of the thermocouple is connected to the sensor unit; the movable bracket is arranged around the fixed unit, and the spatial position of the hot end of the thermocouple is fixed by a dragging couple device; the cold end of the thermocouple is plugged into the sensor unit and connected to a paperless recorder or a furnace temperature testing instrument through a compensation wire. According to the furnace temperature testing scheme, the thermocouple, the fixed unit and the movable bracket are assembled and placed on the trolley, and the cold end of the thermocouple is connected to the paperless recorder through the sensor unit to perform a furnace temperature test. The device in the present invention is generally applicable to trolley-type heat treatment furnaces of various specifications and sizes, simplifies the workload, reduces the loss rate of the thermocouple, and at the same time achieves the purpose of improving the accuracy of the furnace temperature test and ensuring the success rate of the furnace temperature test.

Description

Technical Field

[0001] The invention belongs to the technical field of furnace temperature testing, and in particular relates to a furnace temperature testing device for a trolley-type heat treatment furnace and a use method thereof. Background Art

[0002] The existing temperature control accuracy and insulation requirements for heat treatment furnaces are constantly increasing with the increasing requirements for product quality on heat treatment processes. At the same time, in response to the continuous improvement of system certification requirements such as the American Petroleum Institute (API), SKF of Sweden, the National Aerospace and Defense Contractors Credit Program (NADCAP) and military industry, furnace temperature testing is regarded as one of the most important control methods to ensure the performance of heat treatment furnaces.

[0003] At present, most heat treatment furnaces are controlled according to AMS5750E standard and GB / T 9452 standard. With the improvement of heat treatment furnace grade, the workload of furnace temperature test also increases. Taking the normal furnace temperature test with 23 temperature measurement points as an example, it needs to use 5 20-meter furnace temperature test thermocouples, 2 18-meter furnace temperature test thermocouples, 3 15-meter furnace temperature test thermocouples, 5 10-meter furnace temperature test thermocouples, 3 8-meter furnace temperature test thermocouples, and 5 5-meter furnace temperature test thermocouples. Each test requires pulling wires and laying out wire samples, and the thermocouples need to be rolled up and unrolled. Each furnace temperature test takes up to 6.6 hours, resulting in a large amount of labor waste, which greatly affects the production rhythm. Most trolley-type heat treatment furnaces use mixed coal gas and natural gas as energy media, and the nozzles are mostly pulse nozzles and blow flame heating. When the furnace temperature is adjusted, During the test, most of the furnace temperature test galvanic couples are exposed in the heat treatment furnace. The furnace temperature test galvanic couples are directly heated by the flame, resulting in uneven local heating of the furnace temperature test galvanic couples, which leads to increased galvanic couple loss and greatly increases the loss of the furnace temperature test galvanic couples, an average of 2 to 3 galvanic couples per unit, with a loss cost of 2,500 yuan per galvanic couple. In addition, for each heat treatment furnace temperature test, the furnace temperature test galvanic couples need to be collected twice, which greatly increases the workload. The existing furnace temperature test adopts a loose connection and splicing method when laying out the couples. After the galvanic couples are collected, they are pulled out of the furnace door and connected to the paperless recorder. During the furnace temperature test, the furnace temperature test error increases due to virtual connection and loose wiring, resulting in distortion of the furnace temperature test data and test failure. The failure rate caused by the furnace temperature test itself is as high as 23.3%.

[0004] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0005] The present invention provides a trolley-type heat treatment furnace temperature testing device and a method for using the same, aiming to overcome the problems in the prior art of large workload, long time consumption, high loss rate of furnace temperature testing couples, low accuracy of furnace temperature testing results, and low success rate of furnace temperature testing during the furnace temperature testing process.

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

[0007] A trolley-type heat treatment furnace temperature testing device comprises: a thermocouple, a fixing unit, a movable bracket and a sensor unit;

[0008] There are multiple thermocouples, and the two ends of the thermocouple are a thermocouple cold end and a thermocouple hot end respectively. The thermocouple hot end is fixed on a movable bracket, and the thermocouple cold end is connected to a paperless recorder or a furnace temperature test instrument through a sensor unit;

[0009] The fixing unit comprises a frame and a fixing ring, the thermocouple is laid inside the frame, and the fixing ring is arranged inside the frame for fixing the thermocouple;

[0010] There are multiple movable brackets, and the movable brackets are distributed around the fixed unit; each movable bracket is provided with multiple drag couple devices, and the drag couple devices fix the spatial position of the thermocouple by hanging the hot end of the thermocouple;

[0011] A sensor unit, wherein a plurality of inner cavities are provided on the sensor unit, and thermocouple connectors are respectively installed in the inner cavities, one end of the thermocouple connector is used for plugging into the cold end of the thermocouple, and the other end is connected to the paperless recorder or the furnace temperature test meter through a compensation wire, and the paperless recorder or furnace temperature test meter connected by the compensation wire is used for recording the data measured by the thermocouple.

[0012] As described above, the trolley-type heat treatment furnace temperature testing device, as a preferred solution, the frame includes a first frame and a second frame, the first frame is a rectangular structure, including two longitudinal frames arranged oppositely and two transverse frames arranged oppositely, the two longitudinal frames and the two transverse frames are fixedly connected together; the second frame is arranged on one of the diagonals of the first frame, and the two ends of the second frame are respectively fixedly connected to the first frame;

[0013] The first frame and the second frame are both provided with grooves inside, the grooves of the first frame are connected to each other, the groove of the second frame is connected to the groove of the first frame, and the thermocouple is laid in the groove;

[0014] The fixing rings are arranged in the grooves of the longitudinal frame and the second frame, and are used to fix the thermocouples laid in the grooves of the longitudinal frame and the second frame.

[0015] The trolley-type heat treatment furnace temperature testing device as described above is, as a preferred embodiment, an extension frame is provided at one end of one of the longitudinal frames, a collecting groove is provided inside the extension frame, the collecting groove is connected to the groove of the longitudinal frame, and the cold ends of the thermocouples are collected and connected to the sensor unit through the collecting groove.

[0016] As the above-mentioned trolley-type heat treatment furnace temperature testing device, as a preferred embodiment, the fixing ring is in a circular ring shape, and the fixing ring is a stainless steel pipe;

[0017] Preferably, the frame is welded from stainless steel channel steel.

[0018] As a preferred embodiment of the trolley-type heat treatment furnace temperature testing device, the movable bracket includes a vertical tube and a bottom plate, the vertical tube is fixed to the bottom plate, and the bottom plate is used for bottom support;

[0019] Preferably, the vertical pipe is a stainless steel pipe of Φ80-100 mm;

[0020] More preferably, the bottom plate is a square structure of 300×300 mm.

[0021] As the above-mentioned trolley-type heat treatment furnace temperature testing device, as a preferred solution, the thermocouple joints are respectively provided with joint numbers, the thermocouple cold ends are respectively provided with thermocouple numbers, and the thermocouple numbers correspond one to one with the joint numbers;

[0022] Preferably, the paperless recorder or the furnace temperature tester connected to the compensation wire is respectively provided with a channel number, and the channel number corresponds to the connector number one by one.

[0023] As the above-mentioned trolley-type heat treatment furnace temperature testing device, as a preferred embodiment, the thermocouple is an armored thermocouple.

[0024] As the trolley-type heat treatment furnace temperature testing device described above, as a preferred embodiment, the number of the movable brackets is 13, five of the movable brackets are equidistantly arranged on the inner sides of the two longitudinal frames, and three of the movable brackets are equidistantly arranged on the longitudinal median line of the first frame.

[0025] As the above-mentioned trolley type heat treatment furnace temperature testing device, as a preferred solution, the movable bracket is provided with three drag couple devices, and the three drag couple devices are respectively arranged at the upper part, the middle part and the lower part of the movable bracket;

[0026] Preferably, the dragging coupler device is welded to the movable bracket.

[0027] The method for using the above-mentioned trolley-type heat treatment furnace temperature testing device comprises the following steps:

[0028] S1. Develop a furnace temperature test plan based on the size of the trolley-type heat treatment furnace to be tested;

[0029] S2, according to the furnace temperature test scheme in step S1, the thermocouple is laid in the groove inside the fixing unit, the cold end of the thermocouple is collected and passed through the collecting groove, and the thermocouple number is marked on the cold end of the thermocouple to obtain an assembled thermocouple fixing device;

[0030] S3, installing the thermocouple fixing device assembled in step S2 on the trolley table of the trolley-type heat treatment furnace to be tested, arranging the movable brackets around the inner side of the fixing unit according to the furnace temperature test scheme in step S1, and hanging the hot ends of the thermocouples on the corresponding drag couple devices respectively;

[0031] S4, close the furnace door, pull the cold end of the thermocouple passing through the collecting slot in step S2 out of the furnace door, plug the cold ends of the thermocouples outside the furnace door into the corresponding thermocouple connectors according to the thermocouple numbers, and then connect them to the paperless recorder or the furnace temperature test instrument through compensation wires to obtain an assembled furnace temperature test device;

[0032] S5, using the furnace temperature testing device assembled in step S4 to test the furnace temperature of the trolley-type heat treatment furnace to be tested.

[0033] Compared with the closest prior art, the technical solution provided by the present invention has the following excellent effects:

[0034] The furnace temperature testing device in the present invention is based on the furnace temperature testing plan, and the cold end of the thermocouple is manually laid on the fixed unit. The furnace temperature testing work can be performed multiple times after laying it once, which greatly reduces the number of times of manually collecting and releasing the thermocouples, greatly shortens the time of manually laying and collecting the thermocouples, and reduces the workload. In the present invention, the hot end of the thermocouple is fixed on the movable bracket through a dragging couple device, and the spatial position of the hot end of the thermocouple is adjusted according to the furnace temperature testing plan, which greatly increases the versatility of the furnace temperature testing device.

[0035] The present invention adopts a plug-in thermocouple connector to replace the traditional wiring type. After the spatial position of the hot end of the thermocouple and the laying of the thermocouple are fixed, the thermocouple number corresponding to the cold end of the thermocouple is directly matched with the connector number according to the furnace temperature test plan, and the cold end of the thermocouple is directly plugged into the thermocouple connector, and then connected to the channel number corresponding to the paperless recorder or the furnace temperature test instrument through a compensation wire. That is, the plug-in thermocouple connector and the numbering setting adopted in the present invention not only greatly reduce the labor intensity in the furnace temperature test process, but also solve the problem in the prior art that the furnace temperature test error increases due to the virtual connection or loosening of the wiring during the furnace temperature test, resulting in the distortion of the furnace temperature test data.

[0036] The furnace temperature testing device in the present invention is universally applicable to trolley-type heat treatment furnaces of various specifications and sizes, simplifies the workload of furnace temperature testing, reduces the loss rate of thermocouples in furnace temperature testing, and at the same time achieves the purpose of improving the accuracy of furnace temperature testing and ensuring the success rate of furnace temperature testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0038] Figure 1 Schematic diagram of the structure of the furnace temperature testing device in the embodiment of the present invention (part of the movable bracket is not shown);

[0039] Figure 2 for Figure 1 A partial enlarged view of middle A;

[0040] Figure 3 for Figure 1 A partial enlarged view of B in the middle;

[0041] Figure 4 A schematic diagram of the structure of a movable bracket in an embodiment of the present invention;

[0042] Figure 5 A schematic diagram of the structure of a sensor unit in an embodiment of the present invention;

[0043] Figure 6 Schematic diagram of the arrangement of the movable bracket in the embodiment of the present invention;

[0044] Figure 7 Schematic diagram of the spatial distribution of the hot end of the thermocouple in an embodiment of the present invention.

[0045] In the figure: 1. thermocouple; 11. hot end of thermocouple; 12. cold end of thermocouple; 2. fixing unit; 21. trolley table; 22. first frame; 221. longitudinal frame; 222. transverse frame; 223. extension frame; 23. second frame; 24. fixing ring; 3. movable bracket; 31. vertical pipe; 32. bottom plate; 33. dragging couple device; 4. sensor unit; 41. thermocouple connector; 42. inner cavity; 5. compensation wire; 6. paperless recorder or furnace temperature test instrument. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0047] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0048] The present invention manually lays the thermocouple cold end 12 in the groove of the first frame 22 and the second frame 23, and fixes it through the fixing ring 24. The laid thermocouple cold end 12 is summarized in the summary groove. After passing through the summary groove, directly according to the furnace temperature test scheme, the thermocouple number corresponding to the thermocouple cold end 12 corresponds to the joint number one by one, and the thermocouple cold end 12 is directly plugged into the thermocouple joint 41, and then connected to the channel number corresponding to the furnace temperature test instrument 6 through the compensation wire 5. The thermocouple cold end 12 is laid once and can perform multiple furnace temperature tests, which greatly reduces the number of manual thermocouple collection and collection times, greatly shortens the time for manual puppet and collection, and reduces the workload, greatly increasing the versatility of the furnace temperature test device. It should be noted that in this embodiment, the measurement results of the thermocouple are displayed by the furnace temperature test instrument 6. In other embodiments, the furnace temperature test instrument can also be replaced by setting a paperless recorder. The paperless recorder is a common device in the prior art, and its structure and function are not repeated here.

[0049] At the same time, the plug-in thermocouple connector 41 used in the present invention replaces the traditional wiring type, which greatly reduces labor intensity, and the plug-in thermocouple connector is more reliable when used, which solves the problem in the prior art that the furnace temperature test error increases due to the loose connection or loose wiring during the furnace temperature test, causing the furnace temperature test data to be distorted; the furnace temperature testing device in the present invention is generally applicable to trolley-type heat treatment furnaces of various specifications and sizes, simplifies the furnace temperature test workload, reduces the loss rate of thermocouples and achieves the purpose of improving the furnace temperature test accuracy, ensuring the success rate of the furnace temperature test. It has been proved through multiple tests that the furnace temperature testing device in the present invention performs furnace temperature testing on trolley-type heat treatment furnaces, which meets the certification requirements of foreign parties such as NADCAP and SKF, and is particularly suitable for the implementation of furnace temperature testing of heat treatment furnaces with short testing cycles and high furnace temperature testing accuracy.

[0050] like Figure 1 The figure shows a schematic diagram of the structure of a furnace temperature test device in an embodiment of the present invention. The present invention provides a trolley-type heat treatment furnace temperature test device, which includes a plurality of thermocouples, a fixing unit 2, a plurality of movable brackets 3, and a sensor unit 4. The thermocouple is used to directly measure the temperature and convert the temperature signal into a thermoelectric potential signal, which is represented as the temperature of the measured medium through the processing of the thermoelectric potential signal by an electrical instrument.

[0051] In a specific embodiment of the present invention, the thermocouple is an armored thermocouple. The armored thermocouple is a solid combination formed by assembling a thermocouple wire, an insulating material and a metal protective sleeve, and then stretching and processing the combination. The armored thermocouple has many advantages such as being bendable, resistant to high pressure, fast thermal response time and strong and durable. Like the industrial assembled thermocouple, it is used as a sensor for measuring temperature and is usually used in conjunction with a display instrument, a recording instrument and an electronic regulator. The armored thermocouple is a common thermocouple in the prior art, and its structure is no longer described here through the drawings.

[0052] There are multiple thermocouples, and the two ends of the thermocouple are a thermocouple cold end 12 and a thermocouple hot end 11. The thermocouple hot end 11 is fixed on the movable bracket 3, and the thermocouple cold end 12 is connected to the furnace temperature test instrument through the sensor unit. The thermocouple hot end 11 is the measuring end, and the measuring end is fixed on the movable bracket 3 to determine the measuring space position of the thermocouple hot end 11.

[0053] The fixing unit 2 includes a frame and a fixing ring 24. The thermocouple is laid inside the frame. The fixing ring 24 is set inside the frame for fixing the thermocouple. The frame is set on the trolley table 21, and the multiple thermocouples laid inside the frame are fixed by the fixing ring 24. The thermocouple can be bent and the length can be made according to actual needs. The thermocouple is laid in the frame of the fixing unit 2 and fixed by the fixing unit 2, which protects the thermocouple so that the thermocouple laid inside the fixing unit 2 will not fall out during the hoisting process.

[0054] In a specific embodiment of the present invention, the frame includes a first frame 22 and a second frame 23. The first frame 22 is a rectangular structure, including two longitudinal frames 221 and two transverse frames 222 arranged opposite to each other. The two longitudinal frames 221 and the two transverse frames 222 are fixedly connected to form a rectangle; the second frame 23 is arranged on one of the diagonals of the first frame 22, and the two ends of the second frame 23 are respectively fixedly connected to the first frame 22.

[0055] Grooves are provided inside the first frame 22 and the second frame 23 . The grooves of the first frame 22 are connected to each other, and the grooves of the second frame 23 are connected to the grooves of the first frame 22 . Thermocouples are laid in the grooves of the first frame 22 and the second frame 23 .

[0056] Each fixing ring 24 is arranged in the groove of the longitudinal frame 221 and the second frame 23, and the fixing ring 24 is used to fix the thermocouple laid in the groove. The thermocouple is laid in the groove of the first frame 22 and the second frame 23, and passes through the fixing ring 24 in the groove, and the thermocouple is fixed by the fixing ring 24.

[0057] like Figure 2The figure shows a schematic diagram of the settings of both ends of any thermocouple, where the hot end 11 of the thermocouple is hung and fixed on the drag couple device 33 of the movable bracket 3, the thermocouple is laid in the groove of the frame and passes through the fixing ring 24, the thermocouple is fixed inside the groove by the fixing ring 24, and the hanging position of the hot end 11 of the thermocouple on the drag couple device 33 can be adjusted in space according to the furnace temperature test scheme in actual application.

[0058] In a specific embodiment of the present invention, an extension frame 223 is connected along one end of the longitudinal frame 221, and a collection groove is provided inside the extension frame 223, which is connected to the groove of the longitudinal frame 221, and a plurality of thermocouple cold ends 12 are collected and connected to the sensor unit 4 through the collection groove. Since the grooves of the first frame 22 and the second frame 23 are interconnected, after the thermocouples are laid in the grooves, all the thermocouple cold ends 12 laid in the grooves are collected together, that is, all the thermocouple cold ends 12 laid in the grooves are collected at the collection groove, and pulled out from the collection groove, and after being pulled out, the thermocouple cold ends 12 are directly plugged into the sensor unit 4.

[0059] In a specific embodiment of the present invention, the fixing ring 24 is in a circular ring shape, a cavity is provided inside the fixing ring 24, and the fixing ring 24 is a stainless steel pipe; preferably, the frame is welded with stainless steel channel steel.

[0060] In actual use, the channel steel is a long steel strip with a groove-shaped cross-section. Its cross-sectional shape is a groove-shaped. The frame can be welded with stainless steel channel steels of different lengths. Directly using channel steel for welding eliminates the step of opening grooves inside the frame, and the process is simple. At the same time, the stainless steel pipe is cut into sections, and then the small sections of the steel pipe are welded in the grooves respectively to form a fixing ring 24. The spacing between adjacent fixing rings 24 is set for replacing thermocouples. The number of fixing rings 24 used in actual applications can be determined according to the actual furnace temperature test plan.

[0061] like Figure 4 The figure shows a schematic diagram of the structure of a movable bracket, wherein there are multiple movable brackets 3, and multiple movable brackets 3 are arranged around the fixed unit 2; multiple dragging couple devices 33 are arranged on the movable bracket 3, and the dragging couple devices 33 fix the spatial position of the thermocouple by hanging the hot end 11 of the thermocouple.

[0062] It should be noted that multiple movable brackets 3 are arranged around the fixed unit 2, that is, multiple movable brackets 3 can be arranged along the outer side of the fixed unit 2, or along the inner side of the fixed unit 2, and the specific arrangement scheme should be set according to the distance in the actual furnace temperature test scheme; in addition, a through hole is provided inside the drag-couple device 33, and the hot end 11 of the thermocouple is inserted from one end of the through hole and comes out from the other end of the through hole, and the hot end 11 of the thermocouple is wrapped around the drag-couple device 33, so that the hot end 11 of the thermocouple is fixed by the drag-couple device 33.

[0063] In practical applications, the number of movable brackets 3 can be determined according to the furnace temperature test plan, and the number of test points of the thermocouple hot end 11 and the spatial position of the thermocouple hot end 11 can be determined according to the volume size of trolley-type heat treatment furnaces of different specifications. The spatial position of the thermocouple hot end 11 is determined by the position at which it is hung on the drag couple device 33, which greatly improves the versatility of the furnace temperature testing device in the present invention.

[0064] In a specific embodiment of the present invention, the movable bracket 3 includes a vertical tube 31 and a bottom plate 32. The vertical tube 31 is fixed on the bottom plate 32, and the bottom plate 32 is used for bottom support; preferably, the vertical tube 31 is a stainless steel tube of Φ80~100mm (such as 80mm, 85mm, 90mm, 95mm, 100mm); more preferably, the bottom plate 32 is a square structure of 300×300mm.

[0065] In a specific embodiment of the present invention, the number of movable brackets 3 is 13. Figure 6 The figure shows a schematic diagram of the arrangement of 13 movable brackets, where the 13 movable brackets 3 are arranged around the fixed unit 2 , five movable brackets 3 are arranged equidistantly on the inner sides of the two longitudinal frames 221 , and three movable brackets 3 are arranged equidistantly on the longitudinal median line of the first frame 22 .

[0066] like Figure 7 The figure shows a schematic diagram of the spatial distribution of the thermocouple hot ends in a specific embodiment of the present invention. According to the furnace temperature test scheme, when 20 thermocouple hot ends 11 need to be arranged, 13 movable brackets 3 need to be placed on the trolley table 21. Three drag couple devices 33 are respectively arranged on the upper, middle and lower parts of each movable bracket 3, that is, the thermocouple hot ends 11 are distributed in the spatial positions of the upper, middle and lower layers. Along the longitudinal frame 221, the drag couple devices 33 on the two movable brackets 3 facing each other respectively form a rectangular shape. The drag couple devices 33 on the 13 movable brackets 3 form a spatial shape of five rectangular structures in total. The four vertices and the center position of the two rectangles at the front and rear ends are respectively connected to the thermocouple hot ends 11 (a total of ten), the four vertices and the center point of the rectangle in the middle position are respectively connected to the thermocouple hot ends 11 (a total of five), and two and three thermocouple hot ends 11 are respectively connected to the vertices of the other two rectangles; in addition, Figure 7 What is listed in the figure is only one specific embodiment. In the actual test process, it is necessary to determine the number of the thermocouple hot ends 11 according to the furnace temperature test plan, so as to determine the hanging method of the thermocouple.

[0067] In a specific embodiment of the present invention, three drag couple devices 33 are provided on the movable bracket 3, and the three drag couple devices 33 are respectively provided at the upper part, the middle part and the lower part of the movable bracket 3; preferably, the drag couple devices 33 are welded to the movable bracket 3. The drag couple devices 33 are welded to the movable bracket 3 according to the furnace temperature test scheme, and the hot end 11 of the thermocouple passes through the through hole inside the drag couple device and then is wound and fixed.

[0068] like Figure 3 , Figure 5 As shown, the sensor unit 4 is provided with a plurality of inner cavities 42, in which thermocouple connectors 41 are respectively installed. One end of the thermocouple connector 41 is used for plugging into the thermocouple cold end 12, and the other end is connected to the furnace temperature test instrument 6 through the compensation wire 5. The furnace temperature test instrument 6 is used to record the data measured by the thermocouple.

[0069] In practical applications, the sensor unit 4 is equivalent to the transfer centralized connector between the thermocouple and the furnace temperature test instrument 6. The sensor unit 4 is provided with a plurality of thermocouple joints 41, which are used to plug and unplug with the thermocouple cold end 12, realizing plug and play, and greatly reducing the labor intensity compared with the wiring in the prior art. In addition, the compensation wire 5 is a pair of wires with an insulating layer having the same nominal value as the thermoelectromotive force of the matched thermocouple within a certain temperature range (0-100°C), which are used to connect the thermocouple and the measuring device to compensate for the error caused by the temperature change at the connection between them and the thermocouple. In a specific embodiment of the present invention, joint numbers are respectively provided on the plurality of thermocouple joints 41, and thermocouple numbers are respectively provided on the thermocouple cold end 12, and the thermocouple numbers correspond one-to-one with the joint numbers; preferably, channel numbers are respectively provided on the furnace temperature test instrument 6, and the channel numbers correspond one-to-one with the joint numbers. In practical applications, the joint numbers are set on the thermocouple joints 41, the thermocouple numbers are set on the thermocouple cold ends 12, and the channel numbers are set on the furnace temperature test meter 6. The numbering is convenient for identifying which thermocouple has entered which channel for signal collection. It should be noted that in this embodiment, the measurement results of the thermocouple are displayed by the furnace temperature test meter 6. In other embodiments, the furnace temperature test meter can also be replaced by a paperless recorder. The paperless recorder is a common device in the prior art, and its structure and function are not described here.

[0070] In a specific embodiment of the present invention, the thermocouple is an armored thermocouple; and the thermocouple connector 41 is an OMEGA thermocouple quick connector.

[0071] In order to better understand the furnace temperature testing device in the present invention, the present invention also provides a method for using the furnace temperature testing device of a trolley-type heat treatment furnace, comprising the following steps:

[0072] S1. Develop a furnace temperature test plan based on the size of the trolley-type heat treatment furnace to be tested.

[0073] S2, according to the furnace temperature test scheme in step S1, the thermocouple is laid in the groove inside the fixing unit 2, the cold end 12 of the thermocouple is collected and passed through the collection groove, and the thermocouple number is marked on the cold end 12 of the thermocouple to obtain an assembled thermocouple fixing device;

[0074] S3, installing the thermocouple fixture assembled in step S2 on the trolley table 21 of the trolley-type heat treatment furnace to be tested, arranging the movable bracket 3 around the inner side of the fixing unit 2 according to the furnace temperature test scheme in step S1, and hanging the thermocouple hot ends 11 on the corresponding drag couple devices 33 respectively;

[0075] S4, close the furnace door, install the thermocouple fixture assembled in step S2 in the trolley-type heat treatment furnace to be tested, and pull the thermocouple cold end 12 passing through the collecting groove out of the furnace door, close the furnace door, and plug the thermocouple cold ends 12 outside the furnace door into the corresponding thermocouple connectors 41 according to the thermocouple numbers, and then connect them to the paperless recorder or the furnace temperature test instrument 6 through the compensation wire 5 to obtain the assembled furnace temperature test device.

[0076] S5. Use the furnace temperature testing device assembled in step S4 to test the furnace temperature of the trolley-type heat treatment furnace to be tested.

[0077] To sum up, the furnace temperature testing device in the present invention is universally applicable to trolley-type heat treatment furnaces of various specifications and sizes. During use, a thermocouple can be used for multiple furnace temperature testing tasks, which greatly reduces the manual workload, simplifies the furnace temperature testing work, and reduces the loss rate of thermocouples in furnace temperature testing. It solves the problem in the prior art that the furnace temperature testing error increases due to false connection or loose wiring during the furnace temperature testing, resulting in distortion of the furnace temperature test data. At the same time, it also achieves the purpose of improving the accuracy of the furnace temperature testing and ensuring the success rate of the furnace temperature testing.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A trolley-type heat treatment furnace temperature testing device, characterized in that: include: Thermocouple, fixing unit, movable bracket and sensor unit; There are multiple thermocouples, and the two ends of the thermocouple are a thermocouple cold end and a thermocouple hot end respectively. The thermocouple hot end is fixed on a movable bracket, and the thermocouple cold end is connected to a paperless recorder or a furnace temperature test instrument through a sensor unit; The fixing unit comprises a frame and a fixing ring, the thermocouple is laid inside the frame, and the fixing ring is arranged inside the frame for fixing the thermocouple; There are multiple movable brackets, and the movable brackets are distributed around the fixed unit; each movable bracket is provided with multiple drag couple devices, and the drag couple devices fix the spatial position of the thermocouple by hanging the hot end of the thermocouple; A sensor unit, wherein a plurality of inner cavities are provided on the sensor unit, wherein thermocouple joints are respectively installed in the inner cavities, wherein one end of the thermocouple joint is used to be plugged into the cold end of the thermocouple, and the other end is connected to the paperless recorder or the furnace temperature test meter through a compensation wire, and the paperless recorder or the furnace temperature test meter connected to the compensation wire is used to record the data measured by the thermocouple; The frame includes a first frame and a second frame, the first frame is a rectangular structure, including two longitudinal frames arranged opposite to each other and two transverse frames arranged opposite to each other, the two longitudinal frames and the two transverse frames are fixedly connected together; the second frame is arranged on one of the diagonals of the first frame, and the two ends of the second frame are respectively fixedly connected to the first frame; The first frame and the second frame are both provided with grooves inside, the grooves of the first frame are connected to each other, the groove of the second frame is connected to the groove of the first frame, and the thermocouple is laid in the groove; The fixing rings are arranged in the grooves of the longitudinal frame and the second frame, and are used to fix the thermocouples laid in the grooves of the longitudinal frame and the second frame; An extension frame is provided at one end of one of the longitudinal frames, a collecting groove is provided inside the extension frame, the collecting groove is communicated with the groove of the longitudinal frame, and the cold ends of the thermocouples are collected and connected to the sensor unit through the collecting groove; The fixing ring is in a circular ring shape and is a stainless steel pipe.

2. The trolley type heat treatment furnace temperature testing device according to claim 1, characterized in that: The frame is welded from stainless steel channel steel.

3. The trolley type heat treatment furnace temperature testing device according to claim 1, characterized in that: The movable bracket includes a vertical tube and a bottom plate, wherein the vertical tube is fixed to the bottom plate, and the bottom plate is used for bottom support.

4. The trolley type heat treatment furnace temperature testing device according to claim 3, characterized in that: The vertical pipe is a stainless steel pipe with a diameter of Φ80~100mm.

5. The trolley type heat treatment furnace temperature testing device according to claim 3, characterized in that: The bottom plate is a square structure of 300×300 mm.

6. The trolley type heat treatment furnace temperature testing device according to claim 1, characterized in that: The thermocouple joints are respectively provided with joint numbers, and the thermocouple cold ends are respectively provided with thermocouple numbers, and the thermocouple numbers correspond one to one with the joint numbers.

7. The trolley type heat treatment furnace temperature testing device according to claim 6, characterized in that: The paperless recorder or the furnace temperature tester connected to the compensation wire is respectively provided with a channel number, and the channel number corresponds to the connector number one by one.

8. The trolley type heat treatment furnace temperature testing device according to claim 6, characterized in that: The thermocouple is an armored thermocouple.

9. The trolley type heat treatment furnace temperature testing device according to claim 8, characterized in that: The number of the movable brackets is 13, five of the movable brackets are equidistantly arranged on the inner sides of the two longitudinal frames, and three of the movable brackets are equidistantly arranged on the longitudinal median line of the first frame.

10. The trolley type heat treatment furnace temperature testing device according to claim 9, characterized in that: The movable bracket is provided with three pair-pulling devices, which are respectively arranged at the upper part, the middle part and the lower part of the movable bracket.

11. The trolley type heat treatment furnace temperature testing device according to claim 10, characterized in that: The dragging couple device is welded on the movable bracket.

12. A method for using the trolley type heat treatment furnace temperature testing device according to any one of claims 1 to 11, characterized in that: The following steps are involved: S1. Develop a furnace temperature test plan based on the size of the trolley-type heat treatment furnace to be tested; S2, according to the furnace temperature test scheme in step S1, the thermocouple is laid in the groove inside the fixing unit, the cold end of the thermocouple is collected and passed through the collecting groove, and the thermocouple number is marked on the cold end of the thermocouple to obtain an assembled thermocouple fixing device; S3, installing the thermocouple fixing device assembled in step S2 on the trolley table of the trolley-type heat treatment furnace to be tested, arranging the movable brackets around the inner side of the fixing unit according to the furnace temperature test scheme in step S1, and hanging the hot ends of the thermocouples on the corresponding drag couple devices respectively; S4, close the furnace door, pull the cold end of the thermocouple passing through the collecting slot in step S2 out of the furnace door, plug the cold ends of the thermocouples outside the furnace door into the corresponding thermocouple connectors according to the thermocouple numbers, and then connect them to the paperless recorder or the furnace temperature test instrument through compensation wires to obtain an assembled furnace temperature test device; S5, using the furnace temperature testing device assembled in step S4 to test the furnace temperature of the trolley-type heat treatment furnace to be tested.

Images