Stretching device for 20MnTiB steel thermal deformation experiment

Abstract

The invention relates to the technical field of steel, and discloses a tensile device for a 20MnTiB steel thermal deformation experiment, the tensile device is characterized in that the two ends of the top of the base are fixedly connected with supporting plates for supporting, and the opposite wall surfaces of the two supporting plates are fixedly connected with mounting plates for bearing; the opposite wall surfaces of the base and the mounting plate are rotationally connected with a clamping assembly for clamping and fixing a sample, the clamping assembly comprises clamping discs for fixing and a transmission shaft which is fixedly connected to the axis positions of the clamping discs and is used for connecting, and a heating furnace for heating the sample is mounted between the two clamping discs; and a rotating assembly used for driving the clamping disc to rotate is mounted on one side of the bottom of the mounting plate. According to the device, the fan and the cooling assembly are arranged, cooling is conducted through the combined action of air cooling and water cooling, the cooling effect is improved, a power source does not need to be installed at the clamping disc, and the situation that the power source is heated at the clamping disc, and the service life of the power source is affected is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of steel, and in particular to a tensile device for hot deformation experiments of 20MnTiB steel. Background Art

[0002] 20MnTiB is a substitute steel for the clamping disc 20CrMnTi, an alloy structural steel, which has good mechanical properties and process performance. After normalizing, its machinability is good, and its fatigue strength, deformation amount, and notch sensitivity under bending load after carburizing are not inferior to those of the clamping disc 20CrMnTi. Tensile equipment is required for its performance experiments.

[0003] The clamping structure of the existing experimental equipment needs to be continuously cooled to prevent high-temperature deformation from affecting the experimental accuracy. The current mainstream single air-cooling or water-cooling schemes have significant defects: air-cooling is restricted by the ambient temperature, resulting in fluctuating heat dissipation efficiency; water-cooling causes heat accumulation due to the difficulty of secondary heat dissipation of the coolant. More seriously, the power unit of water-cooling is installed on the clamping structure, instead forming a reverse heat conduction channel, causing the power unit to absorb the heat of the clamping structure, which not only reduces the heat dissipation efficiency but also accelerates the equipment aging.

[0004] Therefore, this application proposes a tensile device for hot deformation experiments of 20MnTiB steel. Summary of the Invention

[0005] The present invention mainly solves the technical problems of poor cooling effect when air-cooling and water-cooling act alone and overheating and damage of the water-cooling power source in the above-mentioned prior art, and provides a tensile device for hot deformation experiments of 20MnTiB steel.

[0006] To achieve the above object, the present invention adopts the following technical solutions. A tensile device for hot deformation experiments of 20MnTiB steel includes a base. At both ends of the top of the base, there are fixedly connected support plates for support. On the opposite wall surfaces of the two support plates, there is fixedly connected a mounting plate for bearing. On the opposite wall surfaces of the base and the mounting plate, there is rotatably connected a clamping assembly for clamping and fixing a sample. The clamping assembly includes a clamping disc for fixing and a transmission shaft fixedly connected to the axial position of the clamping disc for connection. Between the two clamping discs, there is installed a heating furnace for heating the sample; on one side of the bottom of the mounting plate, there is installed a rotating assembly for driving the clamping disc to rotate; at both ends of the side wall of the support plate, there are installed fans for cooling the clamping disc, and on the transmission shaft, there is installed a cooling assembly for cooling the clamping disc.

[0007] Further, the cooling assembly includes a liquid storage barrel and a heat dissipation pipe. The liquid storage barrel is fixedly connected to the outer wall of the transmission shaft. The heat dissipation pipe is spirally installed at one end of the clamping disc. A return hole for reflux is opened at the top of the liquid storage barrel. The bottom end of the liquid storage barrel at the top is communicated with a first liquid outlet pipe, and the other end of the first liquid outlet pipe is communicated with the central position of the heat dissipation pipe. The tail end of the heat dissipation pipe is communicated with a first return pipe, and the other end of the first return pipe is located at the axis position of the top of the return hole.

[0008] Further, the bottom side wall of the liquid storage barrel at the bottom is communicated with a second liquid outlet pipe, and the other end of the second liquid outlet pipe is communicated with the tail end of the heat dissipation pipe. The central position of the heat dissipation pipe is communicated with a second return pipe, and the bottom end of the second return pipe is located at the axis position of the top of the return hole.

[0009] Further, the rotating assembly includes a driving gear and a driven gear. The driven gear is fixedly connected to the top of the outer wall of the transmission shaft. A servo motor is installed on one side of the bottom of the mounting plate. The driving gear is rotatably connected to the output end of the servo motor. The driven gear meshes with the outer wall of the driving gear.

[0010] Further, a partition box is fixedly connected to the inner wall of the liquid storage barrel at the return hole. A plurality of filter holes arranged in a circular pattern are opened at the bottom of the partition box.

[0011] Further, a cleaning assembly for cleaning and dredging the filter holes is installed in the partition box. The cleaning assembly includes a driving part installed in the partition box and a cleaning part slidably connected to the inner wall of the liquid storage barrel.

[0012] Further, the cleaning part includes a sliding plate and dredging rods. The sliding plate is slidably connected to the inner wall of the liquid storage barrel. The dredging rods are fixedly connected to the top end of the sliding plate in a circular pattern.

[0013] Further, the driving part includes a rotating rod, impact fan blades and a pressing plate. First connecting rods are fixedly connected to both ends of the top of the sliding plate. The rotating rod is rotatably connected to the inner walls on both sides of the partition box. The impact fan blades are fixedly connected to the outer wall of the rotating rod in a circular pattern, and the pressing plate is fixedly connected to both ends of the rotating rod.

[0014] Further, a plurality of limiting sleeves arranged in a circular pattern are fixedly connected to the outer wall of the clamping disc. A pressing block is slidably connected in the limiting sleeve. The heat dissipation pipe is located on the outer wall of the bottom of the pressing block.

[0015] Further, a second connecting rod is slidably connected to the inner wall of the limiting sleeve. The bottom end of the second connecting rod is fixedly connected to the top of the pressing block. A piston disc is fixedly connected to the axis position of the top end of the second connecting rod.

[0016] Beneficial effects

[0017] The present invention provides a tensile device for 20MnTiB steel hot deformation experiments. It has the following beneficial effects:

[0018] (1) The tensile device for the hot deformation experiment of 20MnTiB steel can cool the clamping plate by blowing with the fan through the provided fan and cooling component, and drive the coolant to flow in the heat dissipation pipe to further cool the clamping plate through the negative pressure generated by the wind force. The wind force cools the coolant flowing out of the first return pipe and the second return pipe, and uses the combined action of air cooling and water cooling for cooling to improve the cooling effect. Moreover, there is no need to install a power source at the clamping plate, avoiding the influence of the heat on the service life of the power source at the clamping plate.

[0019] (2) The tensile device for the hot deformation experiment of 20MnTiB steel can filter the coolant through the provided filter holes and cleaning component, avoiding the influence of impurities on the performance of the coolant, and can dredge the filter holes to avoid the blockage of the filter holes affecting the circulation of the coolant and thus the cooling effect on the clamping plate.

[0020] (3) The tensile device for the hot deformation experiment of 20MnTiB steel can increase the air pressure by heating the inert gas with the heat on the clamping plate through the provided limit sleeve and piston disc, and squeeze the heat dissipation pipe to fit with the clamping plate, avoiding the generation of gaps between the heat dissipation pipe and the clamping plate, which affects the heat conduction and further affects the cooling effect on the clamping plate. Description of the Drawings

[0021] Figure 1 This is the front view of the present invention;

[0022] Figure 2 This is the detailed view of the rotating component of the present invention;

[0023] Figure 3 This is the detailed view of the upper part of the cooling component of the present invention;

[0024] Figure 4 This is the detailed view of the lower part of the cooling component of the present invention;

[0025] Figure 5 This is the cross-sectional view of the liquid storage bucket of the present invention;

[0026] Figure 6 This is the detailed view of the cleaning component of the present invention;

[0027] Figure 7 This is the detailed view of the limit sleeve in the second embodiment of the present invention;

[0028] Figure 8 This is the cross-sectional view of the limit sleeve of the present invention.

[0029] Legend: 10, base; 11, control center; 12, support plate; 13, mounting plate; 14, heating furnace; 20, clamping disc; 21, hydraulic lifting rod; 22, transmission shaft; 30, fan; 40, servo motor; 41, rotating shaft; 42, driving gear; 43, driven gear; 50, liquid storage barrel; 51, guiding plate; 52, first liquid outlet pipe; 53, first return pipe; 54, heat dissipation pipe; 55, second return pipe; 56, second liquid outlet pipe; 57, partition box; 58, filtering holes; 60, rotating rod; 61, impact fan blade; 62, extrusion plate; 63, sliding plate; 64, dredging rod; 65, first connecting rod; 66, return spring; 67, pressure-bearing block; 70, limiting sleeve; 71, piston disc; 72, second connecting rod; 73, extrusion block; 74, adsorption holes. Detailed implementation

[0030] Example 1: A tensile device for hot deformation experiment of 20MnTiB steel, as Figure 1 and Figure 2 shown, includes a base 10. At both ends of the top of the base 10, there are fixedly connected support plates 12 for support. On the opposite wall surfaces of the two support plates 12, there is fixedly connected a mounting plate 13 for bearing. On the opposite wall surfaces of the base 10 and the mounting plate 13, there is rotatably connected a clamping assembly for clamping and fixing the sample. The clamping assembly includes a clamping disc 20 for fixing and a transmission shaft 22 fixedly connected to the axis position of the clamping disc 20 for connection. On the opposite wall surfaces of the two clamping discs 20, there are installed clamping plates for clamping. On the top of the mounting plate 13, there is installed a hydraulic lifting rod 21 for providing tensile force. The transmission shaft 22 is rotatably connected to the telescopic end of the hydraulic lifting rod 21. Between the two clamping discs 20, there is installed a heating furnace 14 for heating the sample. Inside the heating furnace 14, there are two heating barrels with a semi-circular cross-section. The two heating barrels are rotatably connected to each other. On the outer walls of the two heating barrels, there is rotatably connected a connecting plate. The connecting plate is fixedly connected to the side wall of the support plate 12. And on the opposite wall surfaces of the two heating barrels, there is installed a locking structure for cooperative locking. And a through hole is opened at the axis position of the heating furnace 14. And on the side wall of the base 10, there is installed a control center 11 for controlling the equipment on the base 10. When an experiment needs to be carried out, at this time, the sample is passed through the through hole in the heating furnace 14, and the sample is clamped and fixed by the clamping plates on the two clamping discs 20 at both ends. The heating furnace 14 is started through the control center 11 to heat the sample. After heating is completed, the hydraulic lifting rod 21 is started through the control center 11, and the transmission shaft 22 and the clamping disc 20 are pulled by the hydraulic lifting rod 21, so that the sample clamped on the clamping plate can be pulled to carry out the experiment;

[0031] As Figure 2As shown, a rotating assembly for driving the rotation of the clamping disc 20 is installed on one side of the bottom of the mounting plate 13. By driving the rotation of the clamping disc 20 through the rotating assembly, the sample clamped therein is driven to rotate in the heating furnace 14, and the uniformity of sample heating can be improved by rotation.

[0032] As Figure 1 , Figure 3 and Figure 4 As shown, fans 30 for cooling the clamping disc 20 are installed at both ends of the side wall of the support plate 12. By starting the fans 30, the clamping disc 20 can be blown by the wind, and the clamping disc 20 and the clamping plate thereon can be cooled. A cooling assembly for cooling the clamping disc 20 is installed on the transmission shaft 22.

[0033] As Figure 3 As shown, the cooling assembly includes a liquid storage barrel 50 and a heat dissipation pipe 54. The liquid storage barrel 50 is fixedly connected to the outer wall of the transmission shaft 22. The inner wall of the liquid storage barrel 50 stores coolant. The heat dissipation pipe 54 is spirally installed at one end of the clamping disc 20 away from the clamping plate. The heat dissipation pipe 54 is made of copper. A return hole for reflux is opened at the top of the liquid storage barrel 50. A first liquid outlet pipe 52 is connected to the bottom end of the liquid storage barrel 50 at the top. The other end of the first liquid outlet pipe 52 is connected to the central position of the heat dissipation pipe 54. The tail end of the heat dissipation pipe 54 is connected to a first return pipe 53. The other end of the first return pipe 53 is located at the axial position of the top of the return hole. When cooling is required, the coolant in the liquid storage barrel 50 can flow into the heat dissipation pipe 54 through the first liquid outlet pipe 52 at this time, flow along the heat dissipation pipe 54 to the first return pipe 53, and the coolant can flow to the position where the first return pipe 53 is flush with the liquid level of the liquid storage barrel 50. At this time, when blown by the wind of the fan 30, the flow rate at the first return pipe 53 can be accelerated, generating negative pressure, and the coolant in the first return pipe 53 can be sucked out. The coolant in the first return pipe 53 can flow back into the liquid storage barrel 50 through the return hole, and then drive the coolant to circulate in the first liquid outlet pipe 52, the heat dissipation pipe 54 and the first return pipe 53 through the siphon effect, so as to cool the clamping disc 20 through the coolant and the heat dissipation pipe 54, and cool the heat conducted to the heat dissipation pipe 54 on the clamping disc 20 by the wind of the fan 30.

[0034] As Figure 4 As shown, a second liquid outlet pipe 56 is connected to the bottom of the side wall of the liquid storage barrel 50 at the bottom. The other end of the second liquid outlet pipe 56 is connected to the tail end of the heat dissipation pipe 54. A second return pipe 55 is connected to the central position of the heat dissipation pipe 54. The bottom end of the second return pipe 55 is located at the axial position of the top of the return hole. When the wind of the fan 30 blows to the second return pipe 55, the coolant can be sucked into the heat dissipation pipe 54 along the second liquid outlet pipe 56 through negative pressure, and then flow back into the liquid storage barrel 50 through the second return pipe 55 and the return hole on the liquid storage barrel 50.

[0035] More specifically, guide plates 51 are fixedly connected to both sides of the top of the liquid storage barrel 50 at the positions of the return holes. The guide plates 51 are arc-shaped and point to the positions of the return holes. Specifically, when wind force is generated at the fan 30, it can be blown along the guidance of the guide plates 51 to the return holes on the liquid storage barrel 50, further accelerating the flow rate at the return holes and increasing the negative pressure generated by the wind force at the first return pipe 53 and the second return pipe 55.

[0036] As Figure 2 shown, the rotating assembly includes a driving gear 42 and a driven gear 43. The driven gear 43 is fixedly connected to the top of the outer wall of the transmission shaft 22. A servo motor 40 is installed on one side of the bottom of the mounting plate 13. The output end of the servo motor 40 is rotatably connected to a rotating shaft 41. The driving gear 42 is rotatably connected to the output end of the servo motor 40 through the rotating shaft 41. The driven gear 43 meshes with the outer wall of the driving gear 42. When it is necessary to drive the clamping disc 20 to rotate, the servo motor 40 is turned on. The servo motor 40 can drive the driving gear 42 to rotate through the rotating shaft 41, and then drive the driven gear 43 meshing therewith to rotate. The driven gear 43 can drive the clamping disc 20 to rotate through the transmission shaft 22. When the wind blows to the clamping disc 20, the uniformity of cooling can be improved through the rotation of the clamping disc 20.

[0037] As Figure 5 shown, a separation box 57 is fixedly connected to the inner wall of the liquid storage barrel 50 at the position of the return hole. The separation box 57 is arc-shaped and fits on the inner wall of the liquid storage barrel 50. A plurality of filter holes 58 arranged in a circular pattern are opened at the bottom of the separation box 57. When the coolant enters the liquid storage barrel 50 through the return hole, the impurities generated in the coolant can be filtered through the filter holes 58 to prevent the impurities from affecting the cooling effect of the coolant.

[0038] In summary, through the provided fan 30 and the cooling assembly, the clamping disc 20 can be cooled by the blowing of the fan 30, and the negative pressure generated by the wind force can drive the coolant to flow in the heat dissipation pipe 54 to further cool the clamping disc 20. The wind force cools the coolant flowing out of the first return pipe 53 and the second return pipe 55. The cooling is carried out by the combined action of air cooling and water cooling to improve the cooling effect, and there is no need to install a power source at the clamping disc 20, avoiding the influence of the power source being heated at the clamping disc 20 on its service life.

[0039] As Figure 5 and Figure 6 shown, a cleaning assembly for cleaning and dredging the filter holes 58 is installed in the separation box 57. The cleaning assembly includes a driving part installed in the separation box 57 and a cleaning part slidably connected to the inner wall of the liquid storage barrel 50.

[0040] The cleaning part includes a sliding plate 63 and a dredging rod 64. The sliding plate 63 is fan-shaped and slidably connected to the inner wall of the liquid storage barrel 50. The dredging rods 64 are fixedly connected to the top of the sliding plate 63 in a circumferential arrangement and are located at the axis positions of the filtering holes 58. The top of the dredging rod 64 is frustum-shaped and brush hairs are installed on the outer wall. When the sliding plate 63 moves reciprocally, it can drive the dredging rod 64 to move. The dredging rod 64 can then enter and exit the filtering hole 58, and the filtering hole 58 is cleaned by the brush hairs to keep the filtering hole 58 unblocked, preventing the filtering hole 58 from being blocked and affecting the passage of the coolant, thereby affecting the circulation of the coolant.

[0041] The driving part includes a rotating rod 60, an impact fan blade 61 and a pressing plate 62. Both ends of the top of the sliding plate 63 are fixedly connected with a first connecting rod 65. A reset spring 66 is fixedly connected to the wall surface of the sliding plate 63 opposite to the partition box 57. The reset spring 66 is sleeved on the outer wall of the first connecting rod 65. The top of the first connecting rod 65 is fixedly connected with an arc-shaped bearing block 67. The rotating rod 60 is rotatably connected to the inner walls on both sides of the partition box 57. The impact fan blades 61 are fixedly connected to the outer wall of the rotating rod 60 in a circumferential arrangement, and the pressing plate 62 is fixedly connected to both ends of the rotating rod 60 and is elliptical. The pressing plate 62 contacts the bearing block 67 on the first connecting rod 65. When the coolant passes through the reflux hole, the impact of the water flow can drive the impact fan blade 61 and the rotating rod 60 to rotate, and then drive the pressing plate 62 to rotate. When the long axis of the pressing plate 62 contacts the bearing block 67, the bearing block 67 can be driven to move downward by squeezing the bearing block 67, and then drive the sliding plate 63 and the dredging rod 64 to move downward. When the short axis of the pressing plate 62 contacts the bearing block 67, the sliding plate 63 can be driven to move upward by the elastic force of the reset spring 66, and then drive the sliding plate 63 to slide reciprocally in the liquid storage barrel 50.

[0042] Through the arranged filtering holes 58 and the cleaning assembly, the coolant can be filtered to prevent impurities from affecting the performance of the coolant, and the filtering holes 58 can be dredged to prevent the filtering holes 58 from being blocked and affecting the flow of the coolant, thereby affecting the cooling effect on the clamping disc 20.

[0043] Embodiment 2: On the basis of Embodiment 1, referring to Figure 7 and Figure 8 , a plurality of limiting sleeves 70 arranged in a circumferential arrangement are fixedly connected to the outer wall of the clamping disc 20. An extrusion block 73 is slidably connected in the limiting sleeve 70. The bottom end of the extrusion block 73 is arc-shaped, and the heat dissipation pipe 54 is located on the outer wall of the bottom of the extrusion block 73.

[0044] The inner wall of the limit sleeve 70 is provided with a sliding cavity, and a sliding hole is opened at the bottom end of the sliding cavity. A second connecting rod 72 is slidably connected to the inner wall of the sliding hole on the limit sleeve 70. The bottom end of the second connecting rod 72 is fixedly connected to the top of the extrusion block 73. The axis position of the top end of the second connecting rod 72 is fixedly connected with a piston disc 71. The piston disc 71 is slidably connected to the inner wall of the sliding cavity. An inert gas is filled between the top of the piston disc 71 and the sliding cavity. A through pressure relief hole is opened at the bottom end of the sliding cavity. The heat on the clamping disc 20 can be conducted to the sliding cavity through the limit sleeve 70, heating the inert gas in the sliding cavity. The inert gas expands when heated, increasing the air pressure to squeeze the piston disc 71. Through the second connecting rod 72 and the extrusion block 73, the heat dissipation tube 54 is squeezed and moved downward, and the heat dissipation tube 54 can be attached to the clamping disc 20 under extrusion, preventing a gap from being generated between the heat dissipation tube 54 and the clamping disc 20, which affects the heat conduction and further affects the cooling effect on the clamping disc 20.

[0045] More specifically, as Figure 8 shown, both ends of the extrusion block 73 are fixedly connected with protrusions, and a plurality of linearly arranged adsorption holes 74 are opened at the bottom of the protrusions. Specifically, when the wind passes through the bottom of the adsorption holes 74, negative pressure can be generated, driving the extrusion block 73 to move downward through the negative pressure, squeezing the heat dissipation tube 54 to move downward and attach to the clamping disc 20, further preventing a gap from being generated between the heat dissipation tube 54 and the clamping disc 20, which affects the heat conduction and further affects the cooling effect on the clamping disc 20.

[0046] By providing the limit sleeve 70 and the piston disc 71, the air pressure can be increased by heating and raising the temperature of the inert gas by the heat on the clamping disc 20, squeezing the heat dissipation tube 54 to fit with the clamping disc 20, preventing a gap from being generated between the heat dissipation tube 54 and the clamping disc 20, which affects the heat conduction and further affects the cooling effect on the clamping disc 20.

[0047] The working principle of the present invention: When an experiment needs to be carried out, at this time, the sample is passed through the heating furnace 14 and clamped on the two clamping discs 20. After being heated by the heating furnace 14, the hydraulic lifting rod 21 is started to drive the transmission shaft 22 and the clamping disc 20 to move, pulling the sample for the experiment;

[0048] After the experiment is completed, at this time, the fan 30 is turned on. The fan 30 can cool the clamping disc 20 by blowing, and drive the coolant in the top liquid storage barrel 50 to flow in the first liquid outlet pipe 52, the heat dissipation tube 54 and the first return pipe 53 to cool the top clamping disc 20 through the negative pressure generated by the wind at the first return pipe 53 and the second return pipe 55. The coolant in the bottom liquid storage barrel 50 flows in the second liquid outlet pipe 56, the heat dissipation tube 54 and the second return pipe 55 to cool the bottom clamping disc 20;

[0049] When the coolant passes through the return hole and enters the liquid storage barrel 50, it can drive the impact fan blade 61 to rotate, drive the rotating rod 60 and the extrusion plate 62 to rotate, and drive the sliding plate 63 to reciprocate in the liquid storage barrel 50 through the first connecting rod 65, the return spring 66 and the pressure-bearing block 67, and then drive the dredging rod 64 to enter and exit the filtering hole 58 for dredging to keep the filtering hole 58 unblocked;

[0050] Moreover, the high temperature of the clamping disc 20 can heat the inert gas in the limiting sleeve 70, and then drive the second connecting rod 72 and the extrusion block 73 to move downward by extruding the piston disc 71 to extrude the heat dissipation pipe 54 against the outer wall of the clamping disc 20, improving the contact between the heat dissipation pipe 54 and the clamping disc 20.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A tensile device for hot deformation experiments of 20MnTiB steel, comprising a base (10), characterized in that: At both ends of the top of the base (10), there are support plates (12) fixedly connected for support. On the opposite wall surfaces of the two support plates (12), there is a mounting plate (13) fixedly connected for bearing. On the opposite wall surfaces of the base (10) and the mounting plate (13), there is a clamping assembly rotatably connected for clamping and fixing the sample. The clamping assembly includes a clamping disk (20) for fixing and a transmission shaft (22) fixedly connected to the axis position of the clamping disk (20) for connection. A heating furnace (14) for heating the sample is installed between the two clamping disks (20); On one side of the bottom of the mounting plate (13), there is a rotating assembly for driving the clamping disk (20) to rotate; At both ends of the side wall of the support plate (12), there are blowers (30) for cooling the clamping disk (20). A cooling assembly for cooling the clamping disk (20) is installed on the transmission shaft (22).

2. The tensile device for the hot deformation experiment of 20MnTiB steel according to claim 1, characterized in that: The cooling assembly includes a liquid storage barrel (50) and a heat dissipation pipe (54). The liquid storage barrel (50) is fixedly connected to the outer wall of the transmission shaft (22). The heat dissipation pipe (54) is spirally installed at one end of the clamping disk (20). A return hole for reflux is opened at the top of the liquid storage barrel (50). At the bottom end of the liquid storage barrel (50) at the top, a first liquid outlet pipe (52) is connected. The other end of the first liquid outlet pipe (52) is connected to the central position of the heat dissipation pipe (54). The tail end of the heat dissipation pipe (54) is connected to a first return pipe (53). The other end of the first return pipe (53) is located at the axis position above the return hole.

3. The tensile device for the hot deformation experiment of 20MnTiB steel according to claim 2, wherein: At the bottom side wall of the liquid storage barrel (50) at the bottom, a second liquid outlet pipe (56) is connected. The other end of the second liquid outlet pipe (56) is connected to the tail end of the heat dissipation pipe (54). The central position of the heat dissipation pipe (54) is connected to a second return pipe (55). The bottom end of the second return pipe (55) is located at the axis position above the return hole.

4. The tensile device for the hot deformation experiment of 20MnTiB steel according to claim 1, characterized in that: The rotating assembly includes a driving gear (42) and a driven gear (43). The driven gear (43) is fixedly connected to the top of the outer wall of the transmission shaft (22). On one side of the bottom of the mounting plate (13), a servo motor (40) is installed. The driving gear (42) is rotatably connected to the output end of the servo motor (40). The driven gear (43) meshes with the outer wall of the driving gear (42).

5. The tensile device for the hot deformation experiment of 20MnTiB steel according to claim 2, characterized in that: At the position of the return hole on the inner wall of the liquid storage barrel (50), a partition box (57) is fixedly connected. The bottom of the partition box (57) is provided with a plurality of filter holes (58) arranged in a circular pattern.

6. The tensile device for the hot deformation experiment of 20MnTiB steel according to claim 5, characterized in that: A cleaning assembly for cleaning and dredging the filter holes (58) is installed in the partition box (57). The cleaning assembly includes a driving part installed in the partition box (57) and a cleaning part slidably connected to the inner wall of the liquid storage barrel (50).

7. The tensile device for the hot deformation experiment of 20MnTiB steel according to claim 6, wherein: The cleaning part includes a sliding plate (63) and dredging rods (64). The sliding plate (63) is slidably connected to the inner wall of the liquid storage barrel (50). The dredging rods (64) are fixedly connected to the top end of the sliding plate (63) in a circular pattern.

8. The tensile device for the hot deformation experiment of 20MnTiB steel according to claim 7, wherein: The driving part includes a rotating rod (60), an impact fan blade (61) and a pressing plate (62). Both ends of the top of the sliding plate (63) are fixedly connected with a first connecting rod (65). The rotating rod (60) is rotatably connected to the inner walls of both sides of the partition box (57). The impact fan blades (61) are fixedly connected to the outer wall of the rotating rod (60) in a circumferential arrangement, and the pressing plate (62) is fixedly connected to both ends of the rotating rod (60).

9. The tensile device for the hot deformation experiment of 20MnTiB steel according to claim 1, characterized in that: A plurality of limiting sleeves (70) arranged in a circumferential arrangement are fixedly connected to the outer wall of the clamping disc (20). A pressing block (73) is slidably connected in the limiting sleeve (70). The heat dissipation pipe (54) is located on the bottom outer wall of the pressing block (73).

10. The tensile device for the hot deformation experiment of 20MnTiB steel according to claim 9, characterized in that: A second connecting rod (72) is slidably connected to the inner wall of the limiting sleeve (70). The bottom end of the second connecting rod (72) is fixedly connected to the top of the pressing block (73). A piston disc (71) is fixedly connected to the axial position of the top end of the second connecting rod (72).

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