Vacuum heat treatment furnace temperature detection device

By setting up a temperature detection mechanism in the vacuum heat treatment furnace, the problem of insufficient workpiece temperature detection is solved, real-time monitoring of the temperature of the four sides of the workpiece is achieved, the heating process is optimized, process defects are avoided, and the applicability and quality of detection are improved.

CN223412845UActive Publication Date: 2025-10-03SHANGHAI DONGFENG AUTOMOTIVE SPECIAL PARTS CO LTD
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Patent Information

Application Number
CN202422997941.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-05
Publication Date
2025-10-03
Estimated Expiration
2034-12-05

AI Technical Summary

Technical Problem

Existing vacuum heat treatment furnaces are unable to independently detect the temperature of workpieces, resulting in an inability to take timely measures when faced with uneven thermal conductivity of some materials. This can easily lead to process defects in the heated workpieces and is not practical enough.

Method used

A temperature detection device for a vacuum heat treatment furnace was designed. By setting a temperature detection mechanism on the base, including a slider, a screw, a connecting block and a wireless temperature control detection module, the temperature around the workpiece can be measured in real time. The position and angle of the detection module can be adjusted through a bracket connected by a damping bearing to adapt to the shape and size of the workpiece.

Benefits of technology

It realizes real-time monitoring of the temperature conditions of the four surfaces of the workpiece, optimizes the heating process, avoids process defects caused by uneven temperature, and improves the applicability and quality of detection.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of furnace temperature detection, and particularly discloses a vacuum heat treatment furnace temperature detection device which comprises a vacuum heat treatment furnace body, object placing tables are arranged in the vacuum heat treatment furnace body, a base is installed between the two object placing tables in a sliding mode, a first sliding groove is formed in the base, and a temperature detection mechanism is arranged on the base. The temperature detection mechanism comprises first sliding blocks, a first two-way screw rod, a connecting block and a fixing plate, the two first sliding blocks are both located in the first sliding groove and installed in a sliding mode, and the first two-way screw rod is located in the first sliding groove and rotates. According to the vacuum heat treatment furnace, a worker can measure the temperature around a workpiece heated by the vacuum heat treatment furnace body in real time, so that the temperature conditions of the four surfaces of the workpiece can be ensured to be within the processing technology requirement, the temperature measurement of a matrix area is achieved, the heating process is optimized, the workpiece is ensured to reach the standard after being heated, and the working efficiency is improved. The process defect caused by non-uniform temperature is avoided, and the practicability is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of furnace temperature detection, in particular to a vacuum heat treatment furnace temperature detection device. Background Art

[0002] A vacuum heat treatment furnace is a device used for heat treatment in an oxygen-free or low-oxygen environment. It can perform heat treatment processes such as annealing, quenching, and heat treatment by placing the workpiece in a vacuum state and then applying heat. This environment can prevent surface oxidation of the material while providing a more precise and controllable heating process. It is often used to treat metals and alloys to improve their mechanical properties, wear resistance, or corrosion resistance.

[0003] The temperature detection in the existing vacuum heat treatment furnace usually detects the temperature of the entire furnace chamber, and is unable to detect the temperature of the workpiece separately. Therefore, when faced with the uneven thermal conductivity of some materials, timely measures cannot be taken, which can easily lead to process defects in the heated workpiece. The practicality is insufficient and needs to be improved. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the utility model provides a vacuum heat treatment furnace temperature detection device, which solves the technical problem of insufficient practicality of the prior devices.

[0006] (2) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A vacuum heat treatment furnace temperature detection device comprises a vacuum heat treatment furnace body, wherein a storage platform is provided inside the vacuum heat treatment furnace body, a base is slidably installed between two storage platforms, and a first slide groove is provided inside the base;

[0009] The base is provided with a temperature detection mechanism, which includes a first slider, a first bidirectional screw rod, a connecting block, and a fixing plate;

[0010] The two first sliders are both slidably installed inside the first slide groove, the first bidirectional screw rod is rotated inside the first slide groove, the first bidirectional screw rod is threadedly installed on the first slider, the two connecting blocks are both fixedly installed on the upper end of the first slider, the two fixed plates are both fixedly installed on the upper end of the connecting block, and support legs are symmetrically fixedly installed on the upper end of the base, each of the support legs is respectively located at the four corners of the base, and the two connecting blocks are both located between the support legs.

[0011] Preferably: a connecting rod is fixedly installed between each group of support legs, a second sliding groove is opened inside the two connecting rods, a second screw rod is rotatably installed inside the two second sliding grooves, and a second slider is symmetrically threaded on the circumferential surface of the two second screw rods. Each second slider is slidably installed inside the second sliding groove, and the first slider, the first bidirectional screw rod, the second screw rod and the second slider are all made of Inconel 601 alloy.

[0012] Preferably: square grooves are symmetrically opened inside the two fixed plates, each of the square grooves is slidably mounted on the connecting rod, a first connecting bracket is fixedly mounted on the opposite ends of the two fixed plates, the rotating shafts in the two first connecting brackets are mounted on the first connecting bracket using damping bearings, a second connecting bracket is fixedly mounted on the side wall of each second slider, and the rotating shaft of each second connecting bracket is mounted on the second connecting bracket using a damping bearing.

[0013] Preferably: a first wireless temperature control detection module is fixedly installed at the rotating shaft of the two first connecting brackets, a second wireless temperature control detection module is fixedly installed at the rotating shaft of each second connecting bracket, and a first straight end and a second straight end are respectively provided on the side walls of the first bidirectional screw rod and the second screw rod.

[0014] Preferably: a furnace cover is provided on the surface of the vacuum heat treatment furnace body, limiting grooves are symmetrically provided on the side walls of the first slide groove, limiting blocks are symmetrically fixedly installed on the side walls of the two first sliders, each of the limiting blocks is slidably installed with the limiting groove, a fixing block is fixedly installed on the upper end of each second connecting bracket, a through groove is provided inside each of the fixing blocks, a connecting shaft can be provided between each of the through grooves, and the two connecting shafts are slidably installed with the through grooves.

[0015] (3) Beneficial effects

[0016] 1. By setting a temperature detection mechanism on the base, the staff can perform real-time temperature measurement around the workpiece heated by the vacuum heat treatment furnace body, thereby ensuring that the temperature conditions of the four sides of the workpiece are within the processing requirements and achieving temperature measurement in the matrix area, which helps to optimize the heating process, ensure that the workpiece is heated to the standard, avoid process defects caused by uneven temperature, and improve practicality;

[0017] Second, by inserting a flat-blade screwdriver into the first flat-blade screw and rotating it, the first bidirectional lead screw rotates and transmits threaded transmission to the first slider, so that the two first sliders respectively drive the limit blocks to slide inside the first slide groove and the limit groove, thereby driving the two connecting blocks and the first connecting bracket on the fixed plate to move closer to each other, thereby driving the first wireless temperature control detection module to move, and then the distance between the first wireless temperature control detection module and the workpiece can be adjusted according to the size of the workpiece, thereby improving the applicability and ensuring that there is a good detection area between the first wireless temperature control detection module and the workpiece, thereby improving the detection quality;

[0018] 3. By inserting a flat-blade screwdriver into the second flat-blade head and rotating it, the second flat-blade head generates a radial force to drive the second screw rod to rotate, so that the second screw rod and the second slider are threadedly transmitted, thereby causing the two second sliders to slide inside the second slide groove and move away from or approach each other, thereby driving the second wireless temperature control detection module connected to the second slider to adjust to the two-quarter and three-quarter positions on the side wall of the workpiece, so that the device can adjust the position of the second wireless temperature control detection module according to the length of the workpiece, further improving the applicability and also improving the second wireless temperature control detection module to uniformly detect the temperature of the surrounding area of ​​the workpiece, further improving the detection quality;

[0019] Fourth, by connecting the rotating shafts connecting the first and second connecting brackets to the first and second wireless temperature control detection modules with damping bearings, the device can drive the first and second wireless temperature control detection modules to change angles according to the shape of the workpiece, thereby avoiding the situation where the first and second wireless temperature control detection modules cannot maintain a good measurement area with the workpiece due to the inclined or irregular surface of the workpiece, thereby further improving practicality;

[0020] 5. By setting the limit groove and the square groove, when the first slider moves, it can drive the limit block to slide inside the limit groove, and drive the square groove on the fixed plate to actively slide with the connecting rod, thereby providing multi-directional limit and increasing stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the three-dimensional explosion structure of the utility model;

[0024] Figure 3 This is a cross-sectional view of the vacuum heat treatment furnace body of the present utility model;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the temperature detection mechanism of the utility model;

[0026] Figure 5 This is a schematic diagram of the explosion structure of the temperature detection mechanism of the utility model;

[0027] Figure 6 This is a schematic diagram of the explosion structure of the connecting block connection of the utility model;

[0028] Figure 7 This is a schematic diagram of the fixed plate connection explosion structure of the utility model;

[0029] Figure 8 This is a schematic diagram of the explosion structure of the support leg connection of the utility model;

[0030] Figure 9 This is a schematic diagram of the explosion structure of the second slider connection of the utility model;

[0031] Figure 10 It is a schematic diagram of the fixed block connection explosion structure of the utility model.

[0032] In the figure, the correspondence between the component names and the drawing numbers is: 11. Vacuum heat treatment furnace body; 12. Storage table; 13. Base; 14. First slide groove; 15. First slider; 16. First bidirectional screw rod; 17. Connecting block; 18. Fixed plate; 19. Support leg; 21. Connecting rod; 22. Second slide groove; 23. Second screw rod; 24. Second slider; 25. First connecting bracket; 26. Second connecting bracket; 27. First wireless temperature control detection module; 28. Second wireless temperature control detection module; 29. ​​First straight head; 31. Second straight head; 32. Furnace cover; 33. Limiting groove; 34. Limiting block; 35. Fixed block; 36. Through groove; 37. Connecting shaft; 38. Square groove. DETAILED DESCRIPTION

[0033] The embodiment of the present application effectively solves the technical problem of insufficient practicality of existing devices by providing a vacuum heat treatment furnace temperature detection device. By arranging a temperature detection mechanism on the base, the staff can perform real-time temperature measurement around the workpiece heated by the vacuum heat treatment furnace body, thereby ensuring that the temperature conditions of the four surfaces of the workpiece are within the processing technology requirements and achieving temperature measurement of the matrix area, which helps to optimize the heating process, ensure that the workpiece is heated to the standard, avoid process defects caused by uneven temperature, and improve practicality. In addition, by connecting the rotating shaft between the first connecting bracket and the second connecting bracket and the first wireless temperature control detection module and the second wireless temperature control detection module with a damping bearing, the device can drive the first wireless temperature control detection module and the second wireless temperature control detection module to change a certain angle according to the shape of the workpiece, thereby avoiding the first wireless temperature control detection module and the second wireless temperature control detection module from being unable to maintain a good measurement area with the workpiece due to the inclined surface or irregular shape of the workpiece, thereby reducing the measurement quality, thereby further improving practicality.

[0034] Example

[0035] like Figures 1-10 As shown, the technical solution in the embodiment of the present application effectively solves the technical problem of insufficient practicality of the existing device. The overall idea is as follows:

[0036] In response to the problems existing in the prior art, the present invention provides a vacuum heat treatment furnace temperature detection device, comprising a vacuum heat treatment furnace body 11, a storage platform 12 is provided inside the vacuum heat treatment furnace body 11, a base 13 is slidably installed between the two storage platforms 12, and a first slide groove 14 is provided inside the base 13;

[0037] A temperature detection mechanism is provided on the base 13, and the temperature detection mechanism includes a first slider 15, a first bidirectional screw rod 16, a connecting block 17, and a fixing plate 18. By arranging the temperature detection mechanism on the base 13, the staff can perform real-time temperature measurement around the workpiece heated by the vacuum heat treatment furnace body 11, thereby ensuring that the temperature conditions of the four surfaces of the workpiece are within the processing requirements and achieving temperature measurement of the matrix area, which helps to optimize the heating process, ensure that the workpiece is heated to the standard, avoid process defects caused by uneven temperature, and improve practicality.

[0038] The two first sliders 15 are both located in the first slide groove 14 and are slidably installed. The first bidirectional screw rod 16 is located in the first slide groove 14 and rotates. The first bidirectional screw rod 16 is threadedly installed with the first slider 15. The two connecting blocks 17 are both located at the upper end of the first slider 15 and are fixedly installed. The two fixing plates 18 are both located at the upper end of the connecting blocks 17 and are fixedly installed. The upper end of the base 13 is symmetrically fixed with support legs 19. Each support leg 19 is located at the four corners of the base 13. The two connecting blocks 17 are located between the support legs 19. By inserting a flat-blade screwdriver into the first flat-blade 29 and rotating it, the first The bidirectional lead screw 16 rotates and transmits threaded transmission to the first slider 15, so that the two first sliders 15 respectively drive the limit blocks 34 to slide inside the first slide groove 14 and the limit groove 33, thereby driving the two connecting blocks 17 and the first connecting bracket 25 on the fixed plate 18 to approach each other, thereby driving the first wireless temperature control detection module 27 to move, and then the distance between the first wireless temperature control detection module 27 and the workpiece can be adjusted according to the size of the workpiece, thereby improving the applicability and ensuring that there is a better detection area between the first wireless temperature control detection module 27 and the workpiece, thereby improving the detection quality.

[0039] A connecting rod 21 is fixedly installed between each set of supporting legs 19. A second sliding groove 22 is opened inside the two connecting rods 21. A second screw rod 23 is rotatably installed inside the two second sliding grooves 22. The circumferential surfaces of the two second screw rods 23 are symmetrically threaded with second sliders 24. Each second slider 24 is slidably installed inside the second sliding groove 22. The first slider 15, the first bidirectional screw rod 16, the second screw rod 23 and the second slider 24 are all made of Inconel. Made of 601 alloy, by inserting a flat-blade screwdriver into the second flat-blade head 31 and rotating it, the second flat-blade head 31 generates a radial force to drive the second screw rod 23 to rotate, so that the second screw rod 23 and the second slider 24 are threadedly transmitted, thereby causing the two second sliders 24 to slide inside the second slide groove 22 and move away from or approach each other, thereby driving the second wireless temperature control detection module 28 connected to the second slider 24 to adjust to the two-quarter and three-quarter positions on the side wall of the workpiece, so that the device can adjust the position of the second wireless temperature control detection module 28 (the first wireless temperature control detection module 27 and the second wireless temperature control detection module 28 are existing structures, generally composed of a temperature sensor, a microcontroller, a wireless communication module, a power management unit, and a PCB board) according to the length of the workpiece, further improving the applicability while also improving the second wireless temperature control detection module 28 to evenly detect the surrounding temperature of the workpiece, further improving the detection quality.

[0040] Square grooves 38 are symmetrically opened inside the two fixed plates 18, and each square groove 38 is slidably installed with the connecting rod 21. The first connecting brackets 25 are fixedly installed on the opposite ends of the two fixed plates 18, and the rotating shafts in the two first connecting brackets 25 are installed on the first connecting bracket 25 with damping bearings. A second connecting bracket 26 is fixedly installed on the side wall of each second slider 24, and the rotating shaft of each second connecting bracket 26 is installed on the second connecting bracket 26 with a damping bearing. By providing the limit groove 33 and the square groove 38, when the first slider 15 moves, it can drive the limit block 34 to slide inside the limit groove 33, and drive the square groove 38 on the fixed plate 18 to actively slide with the connecting rod 21, thereby providing multi-party limit and increasing stability.

[0041] A first wireless temperature control detection module 27 is fixedly installed at the rotating shaft of the two first connecting brackets 25, and a second wireless temperature control detection module 28 is fixedly installed at the rotating shaft of each second connecting bracket 26. A first straight head 29 and a second straight head 31 are respectively provided on the side walls of the first bidirectional screw rod 16 and the second screw rod 23. By connecting the rotating shafts between the first connecting bracket 25 and the second connecting bracket 26 and the first wireless temperature control detection module 27 and the second wireless temperature control detection module 28 with damping bearings, the device can drive the first wireless temperature control detection module 27 and the second wireless temperature control detection module 28 to change a certain angle according to the shape of the workpiece, thereby avoiding the first wireless temperature control detection module 27 and the second wireless temperature control detection module 28 being unable to maintain a good measurement area with the workpiece due to the inclined surface or irregular shape of the workpiece, thereby reducing the measurement quality, thereby further improving practicality.

[0042] A furnace cover 32 is provided on the surface of the vacuum heat treatment furnace body 11, and a limiting groove 33 is symmetrically provided on the side wall of the first slide groove 14. A limiting block 34 is symmetrically fixed on the side wall of the two first sliders 15, and each limiting block 34 is slidably installed with the limiting groove 33. A fixing block 35 is fixedly installed on the upper end of each second connecting bracket 26, and a through groove 36 is penetrated inside each fixing block 35. A connecting shaft 37 can be provided between each through groove 36, and the two connecting shafts 37 are slidably installed with the through groove 36. By setting the fixing block 35, the staff can insert the connecting shaft 37 into the through groove 36 when facing the cube-shaped workpiece, and then complete the synchronous adjustment of a group of second wireless temperature control detection modules 28, which is convenient for operation.

[0043] Working principle:

[0044] In the first step, when the vacuum heat treatment furnace body 11 needs to be used to process a workpiece, the staff can open the furnace cover 32 of the vacuum heat treatment furnace body 11, and then the staff can use a forklift to remove the base 13 as a whole from the storage table 12. After the base 13 is removed, the staff can use a sling to lift the workpiece to be processed and move the workpiece to the position between the connecting block 17 and the connecting rod 21. Then the staff can operate the sling to place the workpiece on the base 13;

[0045] In the second step, at this time, the staff can first insert a flat-blade screwdriver into the first flat-blade head 29 and rotate it, so that the first flat-blade head 29 generates a radial force to drive the first bidirectional screw rod 16 to rotate, and at the same time, the rotation of the first bidirectional screw rod 16 will be threaded with the first slider 15, so that the two first sliders 15 respectively drive the limit blocks 34 to slide in the first slide groove 14 and the limit groove 33, and approach each other at the same time, thereby driving the two connecting blocks 17 and the fixing plate 18 to approach each other. At the same time, the movement of the fixing plate 18 will cause the square groove 38 to actively slide with the connecting rod 21. Then the staff can rotate the first wireless temperature control detection module 27 on the first connecting bracket 25 according to the shape of the front and rear sides of the workpiece, so that the probe of the first wireless temperature control detection module 27 can maintain a good measurement angle with the workpiece;

[0046] In the third step, after the staff has adjusted the first wireless temperature control detection modules 27 on the front and rear sides of the workpiece, the staff can insert a flat-blade screwdriver into the second flat-blade screwdriver 31 according to the overall length of the workpiece and rotate it, so that the second flat-blade screwdriver 31 generates a radial force to drive the second screw rod 23 to rotate, so that the second screw rod 23 and the second slider 24 are threaded, thereby causing the two second sliders 24 to slide inside the second slide groove 22 and move away from or close to each other, until the staff can adjust the second wireless temperature control detection module 28 connected to the second slider 24 to a quarter of the side wall of the workpiece according to the overall length of the workpiece. The second and three-quarter positions are sufficient, and then the staff can repeat the above steps to adjust another set of second wireless temperature control detection modules 28. If the workpiece is a cube, the staff can insert the connecting shaft 37 into the through slot 36 inside the fixed block 35. Then the staff can rotate the connecting shaft 37 to generate radial force on the two fixed blocks 35 to drive one set of second wireless temperature control detection modules 28 to move synchronously until a good measuring angle is maintained between the probe of the square slot 38 and the surface of the workpiece. Then the staff can repeat the above steps to adjust the other set of second wireless temperature control detection modules 28;

[0047] In the fourth step, if the surface of the workpiece is an inclined surface, the staff can remove the connecting shaft 37 and adjust each second wireless temperature control detection module 28 separately. Then the staff can use a forklift to move the base 13 as a whole to the inside of the vacuum heat treatment furnace body 11, and then the staff can start vacuuming. When the inside of the vacuum heat treatment furnace body 11 reaches a vacuum environment, the staff can heat the inside of the vacuum heat treatment furnace body 11. At the same time, the temperatures obtained by the four second wireless temperature control detection modules 28 and the two first wireless temperature control detection modules 27 probes will be fed back to the staff at regular intervals, so that the staff can make real-time adjustments according to the temperature around the workpiece.

[0048] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A vacuum heat treatment furnace temperature detection device, comprising a vacuum heat treatment furnace body (11), wherein a storage platform (12) is provided inside the vacuum heat treatment furnace body (11), and a base (13) is slidably installed between two storage platforms (12), characterized in that: A first sliding groove (14) is provided inside the base (13); A temperature detection mechanism is provided on the base (13), and the temperature detection mechanism includes a first slider (15), a first bidirectional screw rod (16), a connecting block (17), and a fixing plate (18); The two first sliders (15) are both located inside the first slide groove (14) and are slidably installed. The first bidirectional screw rod (16) is located inside the first slide groove (14) and rotates. The first bidirectional screw rod (16) and the first slider (15) are threadedly installed. The two connecting blocks (17) are both located on the upper end of the first slider (15) and are fixedly installed. The two fixing plates (18) are both located on the upper end of the connecting block (17) and are fixedly installed. The upper end of the base (13) is symmetrically fixed with a support leg (19).

2. A vacuum heat treatment furnace temperature detection device according to claim 1, characterized in that: A connecting rod (21) is fixedly installed between each group of supporting legs (19), a second sliding groove (22) is opened inside the two connecting rods (21), a second screw rod (23) is rotatably installed inside the two second sliding grooves (22), and a second slider (24) is symmetrically threaded on the circumferential surface of the two second screw rods (23), and each second slider (24) is located in the second sliding groove (22) and is slidably installed.

3. A vacuum heat treatment furnace temperature detection device according to claim 2, characterized in that: The two fixing plates (18) are symmetrically provided with square grooves (38), each of the square grooves (38) is slidably mounted on the connecting rod (21), and first connecting brackets (25) are fixedly mounted on opposite ends of the two fixing plates (18), and the rotating shafts in the two first connecting brackets (25) are mounted on the first connecting brackets (25) using damping bearings.

4. A vacuum heat treatment furnace temperature detection device according to claim 3, characterized in that: A second connecting bracket (26) is fixedly mounted on the side wall of each second sliding block (24), and a rotating shaft of each second connecting bracket (26) is mounted on the second connecting bracket (26) using a damping bearing.

5. A vacuum heat treatment furnace temperature detection device according to claim 4, characterized in that: A first wireless temperature control detection module (27) is fixedly mounted on the rotation shafts of the two first connecting brackets (25), and a second wireless temperature control detection module (28) is fixedly mounted on the rotation shaft of each second connecting bracket (26).

6. A vacuum heat treatment furnace temperature detection device according to claim 5, characterized in that: A first straight head (29) and a second straight head (31) are respectively provided on the side walls of the first bidirectional screw rod (16) and the second screw rod (23).

7. A vacuum heat treatment furnace temperature detection device according to claim 6, characterized in that: A furnace cover (32) is provided on the surface of the vacuum heat treatment furnace body (11), and limiting grooves (33) are symmetrically provided on the side walls of the first chute (14).

8. A vacuum heat treatment furnace temperature detection device according to claim 7, characterized in that: Limiting blocks (34) are symmetrically fixedly installed on the side walls of the two first sliding blocks (15), and each of the limiting blocks (34) is slidably installed with the limiting groove (33).

9. A vacuum heat treatment furnace temperature detection device according to claim 8, characterized in that: A fixing block (35) is fixedly mounted on the upper end of each second connecting bracket (26), and a through slot (36) is provided inside each fixing block (35).

10. A vacuum heat treatment furnace temperature detection device according to claim 9, characterized in that: A connecting shaft (37) can be provided between each of the through slots (36), and both of the connecting shafts (37) are slidably mounted on the through slots (36).