CN115404414B

CN115404414B - Round steel heat treatment and equipment

Info

Publication number: CN115404414B
Application number: CN202211033236.6A
Authority: CN
Inventors: 郑军辉
Original assignee: Zhejiang Fengprototype Steel Technology Co ltd
Current assignee: Zhejiang Fengprototype Steel Technology Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2023-05-23
Anticipated expiration: 2042-08-26
Also published as: CN115404414A

Abstract

The invention discloses heat treatment round steel and equipment, which comprises a base, wherein a heating furnace is arranged on one side of the top of the base through a stand column, a detachable bottom plate is arranged at the bottom of the heating furnace, a hydraulic cylinder is arranged at the bottom of the bottom plate, an output shaft at the top of the hydraulic cylinder is connected with the bottom plate through a bolt, an electric heating pipe is arranged on the inner wall of the heating furnace through a bolt, a water outlet pipe is arranged at the top of the heating furnace through a bolt, a cavity is formed in the side wall of the heating furnace, a heat exchange pipe is arranged in the cavity, and a water tank is arranged on the other side of the top of the base. The heating cavity and the cooling cavity of the heat treatment equipment are the same cavity, so that the heated round steel does not need to be moved into the cooling cavity from the heating cavity in the heat treatment process of the round steel, the heat treatment efficiency is improved, and the situation that a person touches the heated round steel by mistake is avoided.

Description

Round steel heat treatment and equipment

Technical Field

The invention belongs to the technical field of machinery, and particularly relates to heat treatment round steel and equipment.

Background

The round steel is solid steel with a round section, can be produced by using a hot rolling process, can be cut off according to processing requirements in the using process to obtain round steel with a specified length, and can improve multiple performances through heat treatment.

The heat treatment is a process of heating a workpiece to a specified temperature and then cooling the material to the specified temperature within a specified time, which does not change the shape of the workpiece, but can improve the quality of the workpiece and the mechanical properties of the workpiece, and when heat treating round steel, it is generally required to use corresponding heat treatment equipment.

In the use process of the conventional heat treatment equipment, after the round steel is heated to a specified height, the round steel is required to be taken out of a heating furnace chamber and moved into a cooling chamber to be cooled, so that the round steel is required to be moved by using corresponding equipment, the time required by the movement is increased, the efficiency is influenced, and in addition, in the moving process of the round steel, because the surface temperature of the round steel is higher, scalding can occur if personnel touch the round steel by mistake, and the safety is influenced.

Disclosure of Invention

The invention aims to provide heat treatment round steel and equipment, which are used for solving the problems that the round steel is required to be taken out of a heating furnace chamber and moved into a cooling chamber for cooling in the prior art, the round steel is required to be moved by corresponding equipment, the time required for movement increases the whole heat treatment time, the efficiency is influenced, and in the moving process of the round steel, because the surface temperature of the round steel is higher, scalding occurs and the safety is influenced if personnel touch the round steel by mistake.

In order to achieve the above purpose, the present invention provides the following technical solutions: the heat-treated round steel comprises a round steel body, wherein the round steel body comprises the following components in percentage by mass: 0.3 to 1.2 percent of carbon, 0.02 to 0.04 percent of aluminum, 0.15 to 0.2 percent of phosphorus, 0.15 to 0.27 percent of silicon, 0.3 to 0.7 percent of nickel, 0.01 to 0.03 percent of sulfur, 0.7 to 1 percent of chromium, 0.15 to 0.4 percent of molybdenum, 0.8 to 1.2 percent of manganese and the balance of iron.

Further, the aluminum is acid-soluble aluminum.

The invention also provides heat treatment equipment, which comprises a base, wherein a heating furnace is arranged on one side of the top of the base through a stand column, a detachable bottom plate is arranged at the bottom of the heating furnace, a hydraulic cylinder is arranged at the bottom of the bottom plate, an output shaft at the top of the hydraulic cylinder is connected with the bottom plate through a bolt, an electric heating pipe is arranged on the inner wall of the heating furnace through a bolt, a water outlet pipe is arranged at the top of the heating furnace through a bolt, a cavity is formed in the side wall of the heating furnace, a heat exchange pipe is arranged in the cavity, a water tank is arranged at the other side of the top of the base, a first water pump is arranged at one end of the water tank, a water outlet end of the first water pump is connected with a water inlet end of the heat exchange pipe through a pipeline, a second water pump is arranged at the other end of the water tank, and a water outlet end at the top of the second water pump is connected with the water outlet pipe through a pipeline.

Further, the water tank is internally divided into a hot water cavity and a cold water cavity through a heat insulation plate, the water inlet end at the bottom of the first water pump is connected with the hot water cavity through a pipeline, the water inlet end at the bottom of the second water pump is connected with the cold water cavity through a pipeline, the water outlet end at the bottom of the heat exchange tube is connected with the hot water cavity through a water delivery pipe, and the bottom of one end of the heating furnace is connected with the hot water cavity through a water delivery pipe.

Further, the limiting groove is formed in the top surface of the bottom plate, the cylinder body is welded at the top in the heating furnace, the screw is installed on the bottom surface of the cylinder body through the reserved threaded hole, and the pressing plate is welded at the end part of the screw, which is located outside the cylinder body.

Further, the inlet tube that is linked together with cold water cavity and hot water cavity is welded respectively at water tank top both ends, and water tank one end bottom welding has a drain pipe that is linked together with the hot water cavity, be provided with a valve on the drain pipe, water tank other end bottom welding has No. two drain pipes that are linked together with the cold water cavity, and is provided with No. two valves on the drain pipe.

Further, a pressure relief pipe communicated with the inside of the heating furnace is welded at one end of the top of the heating furnace, and a pressure relief valve is arranged on the pressure relief pipe.

Further, a limiting ring which is in contact with the inner wall of the heating furnace is welded at the top edge of the bottom plate.

Further, a third valve is arranged on the water pipe.

Further, a protective cover is arranged on the periphery of the electric heating pipe through screws.

Compared with the prior art, the invention has the beneficial effects that:

1. through setting up No. two water pumps, heating furnace and outlet pipe, after the inside round steel temperature of heating furnace reaches required temperature, personnel can close electric heating pipe to control No. two water pump work, thereby make No. two water pumps carry the cooling water in the water tank and spray to the round steel in the heating furnace through the outlet pipe on, and then cool off the operation to the round steel, this heat treatment facility's heating chamber and cooling chamber are same cavity, consequently, carry out the heat treatment in-process to the round steel, need not to remove the round steel after heating from the heating intracavity to the cooling intracavity, thereby improve heat treatment efficiency, and, avoided personnel to touch the condition of round steel after the heating by mistake.

2. The hot water cavity, water pump and heat exchange tube, when cooling round steel, outlet pipe spun water can get into the hot water cavity through the water supply pipe if there is remaining, and, water pump can carry the low temperature water in the hot water cavity to the heat exchange tube in, thereby adsorb the heat in the heating furnace through the heat exchange tube, and water in the heat exchange tube and the water in the hot water cavity can circulate under the effect of water pump, consequently, the water in the hot water cavity can adsorb the heat in the heating furnace through the heat exchange tube, thereby before the heating furnace preliminarily heats, hot water in the hot water cavity gets into the heat exchange tube under the effect of water pump, thereby preheat the operation to the heating furnace, and then improve the heating efficiency of heating furnace, with improvement thermal treatment efficiency.

Drawings

FIG. 1 is a schematic view of the overall structure of a heat-treated round steel according to the present invention.

Fig. 2 is a schematic view showing the overall structure of a heat treatment apparatus according to the present invention.

FIG. 3 is a schematic sectional view of a heating furnace of a heat treatment apparatus according to the present invention.

Fig. 4 is a schematic cross-sectional view of a water tank of a heat treatment apparatus according to the present invention.

FIG. 5 is a schematic diagram showing a sectional structure of a heating furnace of a heat treatment apparatus according to the present invention in a top view.

Fig. 6 is a schematic view showing the structure of a heat exchanging tube of a heat treating apparatus of the present invention.

FIG. 7 is a schematic view showing the connection structure of the cylinder, screw and platen of a heat treatment apparatus according to the present invention.

Fig. 8 is a schematic view of a water outlet pipe structure of a heat treatment apparatus according to the present invention.

In the figure: 1. round steel body; 2. a base; 3. a column; 4. a hydraulic cylinder; 5. a bottom plate; 6. a limiting ring; 7. a limit groove; 8. a heating furnace; 9. a pressure release valve; 10. a pressure relief tube; 11. a valve III; 12. a water supply pipe; 13. a water pipe; 14. a first water pump; 15. a water tank; 16. a water inlet pipe; 17. a second water pump; 18. a second water draining pipe; 19. a valve II; 20. a valve I; 21. a first drain pipe; 22. a protective cover; 23. an electric heating tube; 24. a heat exchange tube; 25. a cavity; 26. a water outlet pipe; 27. a cylinder; 28. a screw; 29. a pressing plate; 30. a thermal insulation plate; 31. a hot water chamber; 32. a cold water cavity.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1, the heat-treated round steel comprises a round steel body 1, wherein the round steel body comprises the following components in percentage by mass: 0.3 to 1.2 percent of carbon, 0.02 to 0.04 percent of aluminum, 0.15 to 0.2 percent of phosphorus, 0.15 to 0.27 percent of silicon, 0.3 to 0.7 percent of nickel, 0.01 to 0.03 percent of sulfur, 0.7 to 1 percent of chromium, 0.15 to 0.4 percent of molybdenum, 0.8 to 1.2 percent of manganese and the balance of iron.

Wherein the aluminum is acid-soluble aluminum.

As shown in fig. 2, 3, 4, 5 and shown, a heat treatment device comprises a base 2, wherein a heating furnace 8 is installed on one side of the top of the base 2 through a stand column 3, a detachable bottom plate 5 is arranged at the bottom of the heating furnace 8, a hydraulic cylinder 4 is arranged at the bottom of the bottom plate 5, an output shaft at the top of the hydraulic cylinder 4 is connected with the bottom plate 5 through bolts, an electric heating pipe 23 is installed on the inner wall of the heating furnace 8 through bolts, a water outlet pipe 26 is installed on the inner top of the heating furnace 8 through bolts, a cavity 25 is formed in the side wall of the heating furnace 8, a heat exchange pipe 24 is installed in the cavity 25, a water tank 15 is arranged on the other side of the top of the base 2, a first water pump 14 is arranged at one end of the water tank 15, a water outlet end of the first water pump 14 is connected with a water inlet end of the heat exchange pipe 24 through a pipeline, a second water pump 17 is arranged at the other end of the water tank 15, and a water outlet end at the top of the second water pump 17 is connected with the water outlet pipe 26 through a pipeline; the water outlet pipe 26 is annular, and water outlet holes are formed in the bottom of the water outlet pipe, and water can be sprayed into the heating furnace 8 from the water delivery pipe so as to cool round steel, and the hydraulic cylinder 4 can drive the bottom plate 5 to move up and down, while the round steel is fixed at the top of the bottom plate 5, so that the hydraulic cylinder 4 can drive the round steel to move up and down, and the round steel can enter the heating furnace 8 or be separated from the heating furnace 8.

As shown in fig. 2 and 4, the water tank 15 is divided into a hot water cavity 31 and a cold water cavity 32 by a heat insulation plate 30, a water inlet end at the bottom of the first water pump 14 is connected with the hot water cavity 31 by a pipeline, a water inlet end at the bottom of the second water pump 17 is connected with the cold water cavity 32 by a pipeline, a water outlet end at the bottom of the heat exchange tube 24 is connected with the hot water cavity 31 by a water delivery pipe 13, and a bottom of one end of the heating furnace 8 is connected with the hot water cavity 31 by a water delivery pipe 12; the hot water cavity 31 and the cold water cavity 32 can respectively contain hot water and cold water, the cold water can cool the heated round steel, the hot water can enter the heating furnace 8 in the heat exchange tube 24 for preheating operation, and the heat of the hot water in the hot water cavity 31 is from the heating furnace 8, so that the heat energy utilization rate of the equipment is improved.

As shown in fig. 3 and 7, the top surface of the bottom plate 5 is provided with a limit groove 7, the top of the heating furnace 8 is welded with a cylinder 27, the bottom surface of the cylinder 27 is provided with a screw 28 through a reserved threaded hole, and the end part of the screw 28 outside the cylinder 27 is welded with a pressing plate 29; the screw 28 can adjust the height of the pressing plate 29, so that after the round steel is placed in the limit groove 7 and enters the heating furnace 8, the pressing plate 29 can prop against the top of the round steel, and the fixing stability of the round steel is improved.

As shown in fig. 2 and 4, two ends of the top of the water tank 15 are respectively welded with a water inlet pipe 16 communicated with a cold water cavity 32 and a hot water cavity 31, a first water outlet pipe 21 communicated with the hot water cavity 31 is welded at the bottom of one end of the water tank 15, a first valve 20 is arranged on the first water outlet pipe 21, a second water outlet pipe 18 communicated with the cold water cavity 32 is welded at the bottom of the other end of the water tank 15, and a second valve 19 is arranged on the second water outlet pipe 18; liquid can be injected into the cold water chamber 32 and the hot water chamber 31 through the two water inlet pipes 16, respectively, and water in the hot water chamber 31 and the cold water chamber 32 can be discharged through the first water discharge pipe 21 and the second water discharge pipe 18, respectively.

As shown in fig. 2, a pressure relief pipe 10 communicated with the inside of the heating furnace 8 is welded at one end of the top of the heating furnace 8, and a pressure relief valve 9 is arranged on the pressure relief pipe 10; when the pressure in the heating furnace 8 reaches the threshold value, the pressure release valve 9 is opened, and the pressure release operation is performed on the heating furnace 8.

As shown in fig. 2 and 3, a limiting ring 6 contacting with the inner wall of the heating furnace 8 is welded at the top edge of the bottom plate 5; when the bottom plate 5 contacts with the heating furnace 8, the limiting ring 6 can be clung to the bottom of the inner wall of the heating furnace 8, so that the connection stability of the bottom plate 5 and the heating furnace 8 is improved.

As shown in fig. 2, the water pipe 13 is provided with a valve No. 11; the valve number three 11 can control whether the water pipe 13 is conducted or not, so as to control whether water is reserved in the heat exchange pipe 24 or not.

As shown in fig. 3 and 5, a protective cover 22 is mounted on the periphery of the electric heating tube 23 through screws; the protective cover 22 can protect the electric heating pipe 23, and prevent the electric heating pipe 23 from directly contacting with external objects, so as to ensure the service life of the electric heating pipe 23.

The working principle and the using flow of the invention are as follows: the personnel connect the electrical equipment of the heat treatment equipment with external power supply equipment, then water is injected into the cold water cavity 32 of the water tank 15, next, the personnel can insert a cylinder into the limit groove 7 at the top of the bottom plate 5, then, the hydraulic cylinder 4 is controlled to drive the bottom plate 5 to move upwards, so that the bottom plate 5 seals the bottom of the heating furnace 8, round steel is positioned in the heating furnace 8, next, the personnel control the electric heating pipe 23 to work, so as to heat the round steel, after the temperature of the round steel reaches a required value, the personnel can close the electric heating pipe 23, and control the second water pump 17 to work, so that the second water pump 17 conveys the cooling water in the water tank 15 to the round steel in the heating furnace 8 through the water outlet pipe, and then the round steel is cooled, if the water sprayed out of the water outlet pipe remains, the water enters the hot water cavity 31 through the water delivery pipe 12, in addition, the first water pump 14 can convey low-temperature water in the hot water cavity 31 into the heat exchange tube 24 so as to absorb heat in the heating furnace 8 through the heat exchange tube 24, and water in the heat exchange tube 24 and water in the hot water cavity 31 can circularly flow under the action of the first water pump 14, so that the water in the hot water cavity 31 can absorb the heat in the heating furnace 8 through the heat exchange tube 24, and when the heating furnace 8 subsequently heats round steel, the hot water in the hot water cavity 31 can enter the heat exchange tube 24 first under the action of the first water pump 14 to preheat the heating furnace 8, thereby improving the heating efficiency of the heating furnace 8 so as to improve the heat treatment efficiency, and next, after the round steel is heat treated, a person can control the hydraulic cylinder 4 again so as to drive the bottom plate 5 to move downwards, so that the round steel is separated from the heating furnace 8, so that the personnel can take the round steel conveniently.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected;

the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.

Claims

1. Heat treatment equipment for round steel, comprising a base (2), characterized in that: the heating furnace is characterized in that a heating furnace (8) is arranged on one side of the top of the base (2) through a stand column (3), a detachable bottom plate (5) is arranged at the bottom of the heating furnace (8), a hydraulic cylinder (4) is arranged at the bottom of the bottom plate (5), an output shaft at the top of the hydraulic cylinder (4) is connected with the bottom plate (5) through a bolt, an electric heating pipe (23) is arranged on the inner wall of the heating furnace (8) through a bolt, a water outlet pipe (26) is arranged at the inner top of the heating furnace (8) through a bolt, a cavity (25) is formed in the side wall of the heating furnace (8), a heat exchange pipe (24) is arranged in the cavity (25), a water tank (15) is arranged on the other side of the top of the base (2), a first water pump (14) is arranged at one end of the water tank (15), a water outlet end of the first water pump (14) is connected with a water inlet end of the heat exchange pipe (24) through a pipeline, and a second water pump (17) is arranged at the other end of the top of the second water pump (17) and is connected with the water outlet pipe (26) through a pipeline;

the inside of the water tank (15) is divided into a hot water cavity (31) and a cold water cavity (32) through a heat insulation plate (30), the water inlet end at the bottom of the first water pump (14) is connected with the hot water cavity (31) through a pipeline, the water inlet end at the bottom of the second water pump (17) is connected with the cold water cavity (32) through a pipeline, the water outlet end at the bottom of the heat exchange pipe (24) is connected with the hot water cavity (31) through a water delivery pipe (13), and the bottom of one end of the heating furnace (8) is connected with the hot water cavity (31) through a water delivery pipe (12);

round steel comprises the following components in percentage by mass: 0.3 to 1.2 percent of carbon, 0.02 to 0.04 percent of aluminum, 0.15 to 0.2 percent of phosphorus, 0.15 to 0.27 percent of silicon, 0.3 to 0.7 percent of nickel, 0.01 to 0.03 percent of sulfur, 0.7 to 1 percent of chromium, 0.15 to 0.4 percent of molybdenum, 0.8 to 1.2 percent of manganese and the balance of iron.

2. A heat treatment apparatus for round steel as claimed in claim 1, wherein: limiting grooves (7) are formed in the top surface of the bottom plate (5), a cylinder body (27) is welded at the inner top of the heating furnace (8), a screw (28) is mounted on the bottom surface of the cylinder body (27) through a reserved threaded hole, and a pressing plate (29) is welded at the end part of the screw (28) located outside the cylinder body (27).

3. A heat treatment apparatus for round steel as claimed in claim 1, wherein: the water tank is characterized in that water inlet pipes (16) communicated with the cold water cavity (32) and the hot water cavity (31) are welded at two ends of the top of the water tank (15) respectively, a first water drain pipe (21) communicated with the hot water cavity (31) is welded at one end bottom of the water tank (15), a first valve (20) is arranged on the first water drain pipe (21), a second water drain pipe (18) communicated with the cold water cavity (32) is welded at the other end bottom of the water tank (15), and a second valve (19) is arranged on the second water drain pipe (18).

4. A heat treatment apparatus for round steel as claimed in claim 1, wherein: one end of the top of the heating furnace (8) is welded with a pressure relief pipe (10) communicated with the inside of the heating furnace, and the pressure relief pipe (10) is provided with a pressure relief valve (9).

5. A heat treatment apparatus for round steel as claimed in claim 1, wherein: and a limiting ring (6) contacted with the inner wall of the heating furnace (8) is welded at the top edge of the bottom plate (5).

6. A heat treatment apparatus for round steel as claimed in claim 1, wherein: and a third valve (11) is arranged on the water delivery pipe (13).

7. A heat treatment apparatus for round steel as claimed in claim 1, wherein: the periphery of the electric heating pipe (23) is provided with a protective cover (22) through screws.