A metal material cryogenic processing device

Abstract

The application belongs to the technical field of cryogenic treatment, and discloses a metal material cryogenic processing equipment, which comprises a base, a box body and a conveying assembly arranged on the top of the base, a nitrogen gas conveying pipe and a feeding port arranged on the side of the box body, a sealing door hinged to the feeding port, a partition plate arranged in the box body and used for dividing the space in the box body into two chambers, a motor one and a plurality of roller shafts one arranged on the side of the partition plate, the motor one connected with the roller shafts one through a belt one, all the roller shafts one arranged in a linear array, a fan assembly with adjustable distance arranged on the inner top wall of the box body, a nitrogen gas recovery assembly connected with the box body through a connecting pipe, a control panel arranged on the side wall of the box body, and the motor one electrically connected with the control panel. The nitrogen gas in the box body can be quickly and fully mixed and uniform, so that the nitrogen gas fully and uniformly contacts the completely exposed outer surface of the workpiece, and the problem that the corrosion resistance of each part of the workpiece material is different due to the uneven contact between the outer surface of the workpiece material and the nitrogen gas is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cryogenic treatment, in particular to a metal material cryogenic processing equipment. BACKGROUND

[0002] Cryogenic treatment is a new technology that the workpiece is placed in a specific, controllable low temperature environment, so that the microstructure of the material changes, thereby improving the performance of the material. The treated material changes in microstructure under low temperature environment, which is manifested in the macroscopic improvement of the material's wear resistance, dimensional stability, tensile strength, residual stress, etc. Domestic and foreign scholars have carried out a lot of related research. With the development of cryogenic technology and the improvement of test means, the research on cryogenic treatment is gradually deepened. In addition to steel materials, the materials have now extended to powder metallurgy, copper alloy, aluminum alloy and other non-metallic materials (such as plastics, nylon, etc.). The application industry is widespread in aerospace, precision instruments and meters, friction pairs, tools, gauges, textile machinery parts, automobile industry and military science and other fields.

[0003] At present, the cryogenic treatment equipment mainly has two forms, one of which uses compressed air to cool, and the lowest use temperature is-100℃. The most commonly used cryogenic equipment uses liquid nitrogen to cool, which is economical and convenient. In the prior art, liquid nitrogen immersion type refrigeration is widely used. This method is to directly put the workpiece into a container filled with liquid nitrogen, so that the workpiece is rapidly cooled to the temperature of liquid nitrogen, and stays at this temperature for a period of time, and finally warms up to complete the whole cryogenic treatment process. In the early stage of the development of cryogenic treatment, liquid nitrogen immersion method is used for cryogenic treatment. However, this method has a fast cooling speed, which leads to excessive thermal stress and easily causes damage to the workpiece material. Moreover, the cooling speed of the workpiece material in the cooling process is uncontrollable, which affects the adjustability of the process. The use of latent heat of vaporization of liquid nitrogen or low-temperature nitrogen refrigeration can solve the drawbacks of liquid nitrogen immersion. The existing refrigeration equipment is mostly horizontal, and it is difficult to send the workpiece and easy to damage. When taking out the material, the cover area is large, which not only increases the energy consumption, but also makes the nitrogen gas evaporate quickly and consume a lot of material. In addition, the nitrogen gas is not evenly distributed in the cryogenic treatment equipment, which easily leads to uneven cooling rate of the workpiece material, resulting in differences in corrosion resistance of each part of the workpiece material, affecting the effect. SUMMARY

[0004] The present application aims to provide a metal material cryogenic processing equipment to solve the technical problem that the nitrogen gas is not evenly distributed in the existing cryogenic treatment equipment, so that the contact between the outer surface of the workpiece material and the nitrogen gas is uneven, resulting in differences in corrosion resistance of each part of the workpiece material.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] The utility model provides a kind of metal material cryogenic processing equipment, including base, the top of the base is equipped with box and conveying assembly, the side of the box is equipped with nitrogen delivery pipe and feed inlet, the feed inlet is hinged with sealing door, the inside of the box is equipped with baffle along its length direction, the space in the box is divided into two chambers by the baffle, one chamber is equipment chamber, another chamber is cooling chamber, the side of the baffle in equipment chamber is equipped with motor one and several roller shafts one, all the roller shafts one are linear array distribution, the both ends of the roller shafts one are rotatably connected with the inner wall of the box, the one end of one of the roller shafts one is fixedly connected with the output shaft of motor one, two adjacent roller shafts one are commonly equipped with belt one, the length of the inner space of the box is greater than the length of workpiece, the distance between two adjacent roller shafts one is less than the length of workpiece, the inside top wall of the box is equipped with fan assembly with adjustable distance, the box is connected with nitrogen recovery assembly by connecting pipe, the side wall of the box is equipped with control panel, and the motor one is electrically connected with the control panel.

[0007] Technical scheme principle: when using, operator places the metal workpiece needing processing on conveying assembly upper end, opens sealing door, starts motor one, and motor one drives all roller shafts one to rotate by belt, and metal workpiece on conveying assembly is conveyed to feed inlet by conveying assembly, and then enters the box by the rolling roller shafts one, so that metal workpiece automatically enters the box, which can reduce labor intensity and prevent workpiece from being damaged during conveying and transferring; after all workpieces enter the box, sealing door is closed, so that the box is in airtight state, nitrogen is sent to cooling chamber through nitrogen delivery pipe, the temperature in the box starts to drop, adjustable distance fan assembly is started, adjustable distance fan assembly can drive nitrogen in cooling chamber to be quickly dispersed in every part of cooling chamber, and motor one can drive workpiece to move left and right on roller shafts one, so that the outer surface of workpiece can be completely and fully exposed to nitrogen, so that nitrogen used for cooling is in full and uniform contact with the outer surface of workpiece, solve the problem that the corrosion resistance of each part of workpiece material is different due to uneven contact between workpiece material outer surface and nitrogen, after cooling chamber reaches ideal temperature and maintains for a period of time, nitrogen in cooling chamber is recovered by nitrogen recovery assembly, sealing door is opened again, and motor one and conveying assembly are started to transfer workpiece in the box to conveying assembly outside the box.

[0008] Further, the adjustable distance fan assembly comprises a motor two, a rotating shaft, a convex strip one, a cam, a hollow shaft, a fan blade, a fixed rod, a guide sleeve, a convex strip two, a sliding rod, a fixed sleeve and a convex ring, the motor two is arranged on the top of the box, the top of the rotating shaft penetrates through the top wall of the box and is fixedly connected with the output shaft of the motor two, the convex strip one is symmetrically distributed on the side surface of the rotating shaft, the hollow shaft is inserted into the bottom of the rotating shaft through the convex strip one, the fan blade is circumferentially arranged on the bottom of the hollow shaft, the convex ring is sleeved on the outer surface of the hollow shaft, the fixed sleeve is rotatably connected with the hollow shaft through the convex ring, the fixed sleeve is arranged on the bottom of the sliding rod, the cam is sleeved on the outer surface of the rotating shaft, the sliding rod is slidably connected with the cam, the convex strip two is symmetrically distributed on the side surface of the sliding rod, the guide sleeve is slidably connected with the sliding rod through the convex strip two, and the guide sleeve is arranged on the bottom of the fixed rod.

[0009] The adjustable distance fan assembly is arranged, the nitrogen in the box can be fully mixed, the nitrogen is uniformly distributed in the cooling chamber, the motor two is started, the rotating shaft is driven to rotate by the motor two, the rotating rotating shaft drives the cam to rotate, and the hollow shaft is driven to rotate through the convex strip one, and the fan blade is further driven to rotate, the rotating cam drives the sliding rod to move up and down under the cooperation of the fixed rod, the guide sleeve and the convex strip two, and the sliding rod moving up and down drives the hollow shaft to move up and down under the limiting action of the convex ring, so that the fan blade rotates and moves up and down at the same time, the nitrogen in the cooling chamber is dispersed into several gas streams, collides with each other, and the purpose of rapid and sufficient mixing is achieved.

[0010] Further, the number of the adjustable distance fan assembly is two, and the other adjustable distance fan assembly is arranged on the inner bottom wall of the box.

[0011] The two groups of adjustable distance fan assemblies blow, so that the nitrogen collides at a high frequency under the action of the two groups of adjustable distance fan assemblies, thereby accelerating the mixing efficiency of the nitrogen.

[0012] Further, the nitrogen conveying pipe is arranged on the side bottom of the box, the nitrogen conveying pipe is provided with a gas flow regulating valve and a gas flow meter, the inner top wall of the box is provided with a temperature sensor, and the temperature sensor, the gas flow regulating valve and the gas flow meter are electrically connected with the control panel.

[0013] The temperature sensor transmits the temperature of the cooling chamber to the control panel in real time, the control panel converts the temperature change in the box into a real-time change rate through data processing, the temperature real-time change rate in the box is monitored, the gas flow regulating valve is controlled to adjust the flow of the nitrogen conveying, so that the temperature change rate in the box is kept in a dynamic balance state, the cooling speed of the workpiece material is controlled in the cooling process, and the excessive thermal stress caused by the high cooling speed is avoided, so that the organization of the workpiece material is not damaged.

[0014] Further, the inner side wall of the box is provided with a buffer pad, which is distributed on both sides of the transmission direction of the roller shaft, and a pressure sensor is arranged in the buffer pad, and the pressure sensor is electrically connected with the control panel.

[0015] The workpiece moves left and right in the box, and the buffer pad can avoid the workpiece from being damaged by colliding with the inner wall of the box, and the pressure sensor can control the rotating direction of the motor one through the control panel.

[0016] Further, the conveying assembly comprises an electric telescopic rod, a crossbar, a roller shaft two, a motor three and a belt two, the electric telescopic rod is fixedly arranged on the top of the base, the crossbar is two, the two crossbars are respectively arranged on the left end and the right end of the roller shaft two, the roller shaft two is rotatably connected with the crossbar, the motor three is connected with the roller shaft two through the belt two, and all the roller shaft two is arranged in a linear array, and the electric telescopic rod is four, two of which are arranged at the bottom of the crossbar.

[0017] The arrangement of the conveying assembly can realize that the metal workpiece automatically enters the box, which can not only reduce the labor intensity, but also prevent the workpiece from being damaged during the conveying and transferring process; first, the electric telescopic rod is lowered to the lowest position, the workpiece is placed on the roller shaft two, then the electric telescopic rod is raised, the crossbar is driven to move upwards, so that the roller shaft two is in the same horizontal position as the roller shaft one, and then the position of the electric telescopic rod is fixed, the motor three is started, the motor three drives the roller shaft two to rotate through the belt two, and the workpiece is moved, so that the automatic transmission of the workpiece is realized.

[0018] Further, the side wall of the box is provided with an infrared receiver close to the feeding port, one end of the crossbar close to the box is provided with an infrared emitter, and the electric telescopic rod and the infrared receiver are electrically connected with the control panel.

[0019] Through the infrared emitter and the infrared receiver, the position of the conveying assembly can be accurately positioned.

[0020] Further, the nitrogen recovery assembly comprises a nitrogen recovery tank and a gas pump, and the nitrogen recovery tank and the gas pump are arranged on the top of the base, and the nitrogen recovery tank is communicated with the cooling chamber through the gas pump.

[0021] The gas pump can recover the nitrogen in the cooling chamber into the nitrogen recovery tank.

[0022] Further, a vacuum pump is arranged on the top of the base, and the input end of the vacuum pump is communicated with the cooling chamber through a connecting pipe.

[0023] The vacuum pump can exhaust the air in the cooling chamber to ensure the purity of the nitrogen in the cooling chamber.

[0024] Further, a plurality of universal wheels are symmetrically arranged on the bottom of the base.

[0025] The universal wheel facilitates the transfer of the device.

[0026] In summary, the present application has the following advantages:

[0027] The present application can disperse the nitrogen in the cooling chamber into several streams of gas by the fan assembly with adjustable distance, and the streams of gas collide with each other to realize the rapid and sufficient mixing of the nitrogen, and the workpiece can move left and right on the roller shaft, so that the outer surface of the workpiece can be completely and sufficiently exposed to the nitrogen, thereby realizing the sufficient and uniform contact between the nitrogen used for cooling and the outer surface of the workpiece, solving the problem of uneven contact between the outer surface of the workpiece material and the nitrogen, which leads to the difference in corrosion resistance of each part of the workpiece material, and the buffer pad can avoid the damage of the workpiece caused by the collision between the workpiece and the inner wall of the box.

[0028] The present application can transmit the temperature of the cooling chamber to the control panel in real time through the temperature sensor, and the control panel can convert the temperature change in the box into real-time change rate through data processing, and can adjust the flow size of the nitrogen delivery through the gas flow regulating valve by monitoring the real-time change rate of the temperature in the box, so as to keep the temperature change rate in the box in a dynamic balance state, control the cooling speed of the workpiece material during the cooling process, and avoid the excessive heat stress caused by the fast cooling speed, which can cause damage to the workpiece material.

[0029] The present application can also recycle the nitrogen, and the purity of the recycled nitrogen can be guaranteed through the vacuum pump. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 It is a front view of the metal material cryogenic processing equipment of the present application

[0031] Fig. 2 is a structural schematic view of the cooling chamber of the metal material cryogenic processing equipment of the present application;

[0032] Fig. 3 It is a local enlarged view of A in Fig. 2;

[0033] Fig. 4 It is a top view of the metal material cryogenic processing equipment of the present application;

[0034] The names of the corresponding marks in the drawings are:

[0035] 1. Base; 2. Housing; 3. Nitrogen delivery pipe; 4. Feed inlet; 5. Sealing door; 6. Partition; 7. Equipment chamber; 8. Cooling chamber; 9. Motor 1; 10. Roller 1; 11. Belt 1; 12. Control panel; 13. Motor 2; 14. Shaft; 15. Protrusion 1; 16. Cam; 17. Hollow shaft; 18. Fan blade; 19. Fixing rod; 20. Guide sleeve; 21. Protrusion 2; 22. Slide rod; 23. Fixed sleeve; 24. Convex ring; 25. Gas flow regulating valve; 26. Gas flow meter; 27. Temperature sensor; 28. Buffer pad; 29. ​​Pressure sensor; 30. Electric telescopic rod; 31. Crossbar; 32. Roller II; 33. Motor III; 34. Belt II; 35. Infrared receiver; 36. Infrared transmitter; 37. Nitrogen recovery tank; 38. Air pump; 39. Vacuum pump; 40. Casters. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0037] like Figs. 1 to 4 As shown, a deep cryogenic processing equipment for metal materials includes a base 1. Four brakeable casters 40 are symmetrically arranged at the four corners of the bottom of the base 1 for easy transfer and fixation of the equipment. From left to right, the top of the base 1 has a housing 2 and a conveying assembly. A nitrogen delivery pipe 3 is located at the bottom left side of the housing 2, and a feed inlet 4 is located in the middle right side of the housing 2. A sealing door 5 is hinged to the feed inlet 4 via a shaft. The sealing door 5 is an electrically operated upward-opening door. A partition 6 is arranged along the length of the housing 2, dividing the space inside the housing 2 into two chambers: an equipment chamber 7 and a cooling chamber 8. A motor 9 and several rollers 10 are located on the side of the partition 6 in the equipment chamber 7. All rollers 10 are arranged in a linear array, with both ends of the rollers 10 rotatably connected to the inner wall of the housing 2. One end of one roller 10 is fixedly connected to the output shaft of the motor 9. Adjacent rollers 10 are connected to a belt 11. The length of the inner space of the housing 2 is greater than the length of the workpiece, and the distance between two adjacent rollers 10 is less than the length of the workpiece. The inner top wall of the housing 2 is equipped with an adjustable distance fan assembly. The housing 2 is connected to a nitrogen recovery assembly through a connecting pipe. The side wall of the housing 2 is equipped with a control panel 12. The motor 9 is electrically connected to the control panel 12. The inner side wall of the housing 2 is equipped with a buffer pad 28, which is distributed on both sides of the transmission direction of the rollers 10. The buffer pad 28 is equipped with a pressure sensor 29, which is electrically connected to the control panel 12. When the workpiece moves left and right in the housing 2, the buffer pad 28 can prevent the workpiece from colliding with the inner wall of the housing 2 and being damaged. The pressure sensor 29 can control the rotation direction of the motor 9 through the control panel 12.

[0038] The adjustable distance fan assembly comprises a motor 13, a rotating shaft 14, a convex strip 15, a cam 16, a hollow shaft 17, a fan blade 18, a fixed rod 19, a guide sleeve 20, a convex strip 21, a sliding rod 22, a fixed sleeve 23 and a convex ring 24. The motor 13 is arranged on the top of the box 2. The top of the rotating shaft 14 penetrates the top wall of the box 2 and is fixedly connected with the output shaft of the motor 13. The convex strips 15 are symmetrically arranged on the side surface of the rotating shaft 14. The hollow shaft 17 is inserted into the bottom of the rotating shaft 14. The inner wall of the hollow shaft 17 is provided with a sliding groove for the sliding of the convex strip 15. The fan blades 18 are arranged in a circumferential array on the bottom of the hollow shaft 17. The convex ring 24 is sleeved on the outer surface of the hollow shaft 17. The fixed sleeve 23 is provided with a groove for the rotation of the convex ring 24. The fixed sleeve 23 is rotationally connected with the hollow shaft 17 through the convex ring 24. The fixed sleeve 23 is arranged on the bottom of the sliding rod 22. The cam 16 is sleeved on the outer surface of the rotating shaft 14. The cam 16 is slidingly connected with the sliding rod 22. The convex strips 21 are symmetrically arranged on the side surface of the sliding rod 22. The inner wall of the guide sleeve 20 is provided with a sliding groove for the sliding of the convex strip 21. The guide sleeve 20 is slidingly connected with the sliding rod 22 through the convex strip 21. The guide sleeve 20 is arranged on the bottom of the fixed rod 19. The fixed rod 19 is fixedly arranged on the inner top wall of the box 2.

[0039] The adjustable distance fan assembly can fully mix the nitrogen in the box 2, so that the nitrogen is quickly and uniformly distributed in the cooling chamber 8. The motor 13 is started, and the motor 13 drives the rotating shaft 14 to rotate. The rotating rotating shaft 14 drives the cam 16 to rotate, and drives the hollow shaft 17 to rotate through the convex strip 15, and further drives the fan blade 18 to rotate. At the same time, the rotating cam 16 drives the sliding rod 22 to move up and down under the cooperation of the fixed rod 19, the guide sleeve 20 and the convex strip 21. The up and down moving sliding rod 22 drives the hollow shaft 17 to move up and down under the limiting action of the convex ring 24, so that the fan blade 18 moves up and down while rotating, so that the nitrogen in the cooling chamber 8 is dispersed into several gas streams, which collide with each other, achieving the purpose of rapid and sufficient mixing.

[0040] The number of adjustable distance fan assemblies is two, and the other adjustable distance fan assembly is arranged on the inner bottom wall of the box 2. The two groups of adjustable distance fan assemblies blow, so that the nitrogen is accelerated to collide under the action of the two groups of fan blades, thereby accelerating the mixing efficiency of the nitrogen.

[0041] The nitrogen conveying pipe 3 is arranged at the bottom of the side of the box 2, the nitrogen conveying pipe 3 is provided with a gas flow regulating valve 25 and a gas flow meter 26, the inner top wall of the box 2 is provided with a temperature sensor 27, the temperature sensor 27, the gas flow regulating valve 25 and the gas flow meter 26 are electrically connected with the control panel 12. The temperature sensor 27 transmits the temperature of the cooling chamber 8 to the control panel 12 in real time, the control panel 12 converts the temperature change in the box 2 into a real-time change rate through data processing, the temperature real-time change rate in the box 2 is monitored, the gas flow regulating valve 25 is controlled to adjust the flow size of the nitrogen conveying, so that the temperature change rate in the box 2 is kept in a dynamic balance state, the cooling speed of the workpiece material is controlled in the cooling process, and the cooling speed is prevented from being too fast to cause excessive thermal stress and cause damage to the workpiece material.

[0042] The conveying assembly comprises an electric telescopic rod 30, a crossbar 31, roller shafts two 32, a motor three 33 and a belt two 34, the electric telescopic rod 30 is fixedly arranged at the top of the base 1, the crossbar 31 is two, the two crossbars 31 are respectively arranged at the left end and the right end of the roller shafts two 32, the roller shafts two 32 are rotationally connected with the crossbar 31, the motor three 33 is connected with the roller shafts two 32 through the belt two 34, all the roller shafts two 32 are linearly arranged, the electric telescopic rod 30 is four, two electric telescopic rods 30 are respectively arranged at the two ends of the bottom of the crossbar 31, the side wall of the box 2 is provided with an infrared receiver 35 close to the feeding port 4, one end of the crossbar 31 close to the box 2 is provided with an infrared emitter 36, and the electric telescopic rod 30 and the infrared receiver 35 are electrically connected with the control panel 12. The setting of the conveying assembly can realize that the metal workpiece automatically enters the box 2, which can not only reduce the labor amount, but also prevent the workpiece from being damaged in the conveying and transferring process; first, the electric telescopic rod 30 is lowered to the lowest position, the workpiece is placed on the roller shafts two 32, then the electric telescopic rod 30 is raised, the crossbar 31 is driven to move upwards, the position of the conveying assembly is accurately positioned through the infrared emitter 36 and the infrared receiver, the roller shafts two 32 and the roller shafts one 10 are kept at the same horizontal position, then the position of the electric telescopic rod 30 is fixed, the motor three 33 is started, the motor three 33 drives the roller shafts two 32 to rotate through the belt two 34, the workpiece is driven to move, and the automatic transmission of the workpiece is realized.

[0043] The nitrogen recovery assembly comprises a nitrogen recovery tank 37 and a gas pump 38, the nitrogen recovery tank 37 and the gas pump 38 are arranged at the top of the base 1, the nitrogen recovery tank 37 is connected with the cooling chamber 8 through the gas pump 38, and the nitrogen in the cooling chamber 8 can be recovered into the nitrogen recovery tank 37 through the gas pump 38. The top of the base 1 is provided with a vacuum pump 39, and the input end of the vacuum pump 39 is connected with the cooling chamber 8 through a connecting pipe. Before cooling, the air in the sealed cooling chamber 8 can be discharged through the vacuum pump 39, so as to ensure the purity of the nitrogen in the cooling chamber 8.

[0044] The specific implementation process is as follows: in use, the operator places the metal workpiece to be processed on the upper end of the roller shaft two 32 of the conveying assembly, raises the electric telescopic rod 30, drives the horizontal rod 31 to move upward, and realizes accurate positioning of the position of the conveying assembly through the infrared emitter 36 and the infrared receiver, so that the roller shaft two 32 is in the same horizontal position as the roller shaft one 10, and then the position of the electric telescopic rod 30 is fixed, then the sealing door 5 is opened, the motor three 33 and the motor one 9 are started, the motor three 33 drives the roller shaft two 32 to rotate through the belt two 34, drives the workpiece to move, realizes automatic transmission of the workpiece, and the motor one 9 drives all the roller shafts one 10 to rotate through the belt, the moving metal workpiece on the roller shaft two 32 is conveyed to the feeding port 4, and the metal workpiece enters the cooling chamber 8 through the rolling roller shaft one 10, so as to realize automatic transfer of the metal workpiece, which can not only reduce the labor intensity, but also prevent the workpiece from being damaged during conveying and transferring.

[0045] After all the workpieces enter the box body 2, the sealing door 5 is closed, the box body 2 is in a sealed state, the motor three 33 is closed, the air in the box body 2 is first exhausted through the vacuum pump 39, then nitrogen is supplied to the cooling chamber 8 through the nitrogen gas delivery pipe 3, the temperature in the box body 2 begins to drop, the motor two 13 of the adjustable distance fan assembly is started, the motor two 13 drives the rotating shaft 14 to rotate, the rotating shaft 14 drives the cam 16 to rotate, and the hollow shaft 17 is driven to rotate through the convex strip one 15, and then the fan blade 18 is driven to rotate; at the same time, the rotating cam 16 drives the sliding rod 22 to move up and down under the cooperation of the fixed rod 19, the guide sleeve 20 and the convex strip two 21, the sliding rod 22 moves up and down under the limiting action of the convex ring 24, drives the hollow shaft 17 to move up and down, so that the fan blade 18 rotates and moves up and down at the same time, so that the nitrogen gas in the cooling chamber 8 is dispersed into several gas streams, collides with each other, and achieves the purpose of rapid and sufficient mixing. And the motor one 9 can drive the workpiece to move on the roller shaft one 10, when the workpiece collides with the buffer pad 28, the buffer pad 28 can avoid the workpiece from being damaged by colliding with the inner wall of the box body 2, and at the same time, the pressure sensor 29 in the buffer pad 28 transmits a signal to the control panel 12, the control panel 12 controls the motor one 9 to rotate reversely, realizes the workpiece in the cooling chamber 8 to move left and right on the roller shaft one 10, so that the outer surface of the workpiece can be completely and fully exposed to the nitrogen gas, so that the nitrogen gas and the outer surface of the workpiece can be fully and uniformly contacted, and the problem that the corrosion resistance of each part of the workpiece material is different due to uneven contact between the outer surface of the workpiece material and the nitrogen gas is solved.

[0046] In the process of deep cooling, the temperature of the cooling chamber 8 is transmitted to the control panel 12 in real time through the temperature sensor 27, and the control panel 12 converts the temperature change in the box 2 into a real-time change rate through data processing. By monitoring the real-time change rate of the temperature in the box 2, the gas flow regulating valve 25 is controlled to adjust the flow rate of the nitrogen delivery, so as to keep the temperature change rate in the box 2 in a dynamic balance state, control the cooling speed of the workpiece material during the cooling process, and avoid the excessive thermal stress caused by the high cooling speed, which may cause damage to the workpiece material.

[0047] Until the cooling chamber 8 reaches the desired temperature and maintains for a period of time, the nitrogen in the cooling chamber 8 can be recovered into the nitrogen recovery tank 37 through the air pump 38. Since the air in the box 2 has been discharged before the deep cooling process, the purity of the recovered nitrogen is ensured. Finally, the sealing door 5 is opened, and the control panel 12 controls the reverse rotation of the motor three 33, so as to transfer the workpiece on the roller shaft one 10 to the roller shaft two 32 outside the box 2.

[0048] The above is only an embodiment of the present application, and the specific technical solutions or common knowledge of the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A deep cryogenic processing device for metal materials, comprising a base (1), a housing (2) and a conveying assembly on the top of the base (1), a nitrogen conveying pipe (3) and a feed inlet (4) on the side of the housing (2), the feed inlet (4) being hinged with a sealing door (5), characterized in that, The housing (2) is provided with a partition (6) along its length, which divides the space inside the housing (2) into two chambers. One chamber is the equipment chamber (7), and the other chamber is the cooling chamber (8). A motor (9) and several rollers (10) are provided on the side of the partition (6) in the equipment chamber (7). All the rollers (10) are arranged in a linear array. The two ends of the rollers (10) are rotatably connected to the inner wall of the housing (2). One end of one of the rollers (10) is connected to... The output shaft of motor 1 (9) is fixedly connected, and two adjacent rollers 1 (10) are fitted with belt 1 (11). The length of the inner space of the box (2) is greater than the length of the workpiece, and the distance between two adjacent rollers 1 (10) is less than the length of the workpiece. The inner top wall of the box (2) is provided with an adjustable distance fan assembly. The box (2) is connected to a nitrogen recovery assembly through a connecting pipe. The side wall of the box (2) is provided with a control panel (12). Motor 1 (9) is electrically connected to the control panel (12). The adjustable distance fan assembly includes a second motor (13), a rotating shaft (14), a first protrusion (15), a cam (16), a hollow shaft (17), fan blades (18), a fixing rod (19), a guide sleeve (20), a second protrusion (21), a slide rod (22), a fixing sleeve (23), and a protruding ring (24). The second motor (13) is located at the top of the housing (2). The top of the rotating shaft (14) passes through the top wall of the housing (2) and is fixedly connected to the output shaft of the second motor (13). The first protrusion (15) is symmetrically distributed on the side of the rotating shaft (14). The hollow shaft (17) is inserted into the bottom of the rotating shaft (14) through the first protrusion (15). The fan blades (18) are arranged in a circular array. The convex ring (24) is sleeved on the outer surface of the hollow shaft (17) and the fixed sleeve (23) is rotatably connected to the hollow shaft (17) through the convex ring (24). The fixed sleeve (23) is located at the bottom of the slide rod (22). The cam (16) is sleeved on the outer surface of the rotating shaft (14). The cam (16) is slidably connected to the slide rod (22). The convex strips (21) are symmetrically distributed on the side of the slide rod (22). The guide sleeve (20) is slidably connected to the slide rod (22) through the convex strips (21). The guide sleeve (20) is located at the bottom of the fixed rod (19). The fixed rod (19) is fixed to the inner top wall of the box (2). The number of adjustable distance fan assemblies is two, with the other adjustable distance fan assembly located on the inner bottom wall of the housing (2).

2. The deep cryogenic processing equipment for metal materials according to claim 1, characterized in that, A nitrogen delivery pipe (3) is located at the bottom side of the box (2). The nitrogen delivery pipe (3) is equipped with a gas flow regulating valve (25) and a gas flow meter (26). A temperature sensor (27) is provided on the top wall inside the box (2). The temperature sensor (27), the gas flow regulating valve (25) and the gas flow meter (26) are all electrically connected to the control panel (12).

3. The deep cryogenic processing equipment for metal materials according to claim 1, characterized in that, The inner wall of the housing (2) is provided with a buffer pad (28), which is distributed on both sides of the roller shaft (10) in the transmission direction. A pressure sensor (29) is provided inside the buffer pad (28), and the pressure sensor (29) is electrically connected to the control panel (12).

4. The deep cryogenic processing equipment for metal materials according to claim 1, characterized in that, The conveying assembly includes an electric telescopic rod (30), a crossbar (31), a second roller (32), a third motor (33), and a second belt (34). The electric telescopic rod (30) is fixed to the top of the base (1). There are two crossbars (31), which are respectively installed at the left and right ends of the second roller (32). The second roller (32) is rotatably connected to the crossbar (31). The third motor (33) is connected to the second roller (32) through the second belt (34). All the second rollers (32) are arranged in a linear array. There are four electric telescopic rods (30), with two electric telescopic rods (30) distributed at the bottom ends of the crossbar (31).

5. The deep cryogenic processing equipment for metal materials according to claim 4, characterized in that, The side wall of the box (2) is provided with an infrared receiver (35) near the feed inlet (4), and the crossbar (31) is provided with an infrared transmitter (36) at one end near the box (2). The electric telescopic rod (30) and the infrared receiver (35) are both electrically connected to the control panel (12).

6. The deep cryogenic processing equipment for metal materials according to claim 5, characterized in that, The nitrogen recovery assembly includes a nitrogen recovery tank (37) and an air pump (38). Both the nitrogen recovery tank (37) and the air pump (38) are located on the top of the base (1). The nitrogen recovery tank (37) is connected to the cooling chamber (8) through the air pump (38).

7. The deep cryogenic processing equipment for metal materials according to claim 1, characterized in that, The base (1) is equipped with a vacuum pump (39) at its top, and the input end of the vacuum pump (39) is connected to the cooling chamber (8) through a connecting pipe.

8. The deep cryogenic processing equipment for metal materials according to claim 1, characterized in that, The bottom of the base (1) is symmetrically provided with several casters (40).

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