CN216585081U - High-efficient quenching furnace structure - Google Patents

Abstract

The utility model relates to and discloses a high-efficiency quenching furnace structure, which comprises an upper cover, a furnace tube, a lower cover, a base and a plurality of hooks; the upper cover and the lower cover are respectively connected with the furnace tube in a detachable and sealed way; the upper cover comprises an upper cover shell and a rotating body, the rotating body comprises a rotatable part and a fixed part, the upper surface of the fixed part is provided with a circle of grooves, and falling notches are formed in the grooves; the bottom of the rotatable component is provided with a circle of convex edge, and the convex edge is provided with a plurality of limiting notches penetrating through the upper surface of the rotatable component; the upper surface of the rotatable part is fixedly connected with a force transmission column, a plurality of hooks are hung on the edge of the groove, each hook is correspondingly positioned in the limiting notch, and the quenching medium container is opposite to the lower part of the furnace tube. Through the setting of rotator, can hang multiunit sample simultaneously, every group sample all drops from the breach that falls to realize quenching in succession, greatly improved the efficiency of whole quenching flow.

Description

High-efficient quenching furnace structure

Technical Field

The utility model relates to the technical field of quenching furnaces, in particular to a quenching furnace which can carry out continuous quenching and can carry out contrast quenching on various quenching media.

Background

Quenching refers to a metal heat treatment process in which a metal workpiece is heated to a suitable temperature and held for a period of time, and then immersed in a quenching medium for rapid cooling. Common quenching media are brine, water, mineral oil, air, and the like. Quenching can improve the hardness and the wear resistance of the metal workpiece. In the case of steel, the quenching process generally comprises a heat treatment process of heating the steel to a temperature above the critical temperature Ac3 (hypoeutectoid steel) or Ac1 (hypereutectoid steel), maintaining the temperature for a period of time to fully or partially austenitize the steel, and then rapidly cooling the steel to a temperature below Ms (or isothermal around Ms) at a cooling rate greater than the critical cooling rate to perform martensite (or bainite) transformation. The quenching is to convert the super-cooled austenite into martensite or bainite to obtain martensite or bainite structure, and then to improve the rigidity, hardness, wear resistance, fatigue strength, toughness and the like of the steel by tempering at different temperatures, thereby meeting different use requirements of various mechanical parts and tools. The special physical and chemical properties of ferromagnetism, corrosion resistance and the like of certain special steel can be met through quenching.

The quenching process comprises 3 stages of heating, heat preservation and cooling. Wherein the heating is to heat the workpiece to a target temperature. The purpose of heat preservation is to make the temperature inside the workpiece uniform and tend to be consistent. For each type of quenching, the heat preservation time finally determines whether the sample area requiring quenching can obtain good quenching heating tissue. Heating and heat preservation are important links influencing quenching quality, and the cooling rate in the cooling stage determines the final structure of the steel.

When the heating furnace is a horizontal furnace, the quenching usually requires taking out the sample by means of a fire tongs or other tools and then quenching. During sampling or operation, temperature drops can occur, resulting in the actual quench temperature being below the design temperature. The vertical furnace can make the sample fall into the quenching medium quickly by using gravity, and the temperature drop can be almost ignored. In actual heat treatment studies or experiments, quenching is usually performed by heating at the same temperature for different times. If a plurality of samples are heated and quenched after reaching the holding time, the furnace cover needs to be opened each time for testing, temperature fluctuation may be caused, and the operation is inconvenient. If only one sample is heated at a time, the heating time is greatly prolonged, and the quenching processing efficiency is influenced. Therefore, a rapid and continuous quenching device is needed, when a plurality of heat preservation times are needed for quenching, a plurality of samples are heated at one time, and after the preset quenching time is reached, the samples are released one by one according to the heat preservation time sequence for quenching, so that the heating efficiency and the quenching efficiency are improved.

Meanwhile, in the quenching test, the quenching performances of different mediums may need to be compared, the same mediums can be divided into a group in the same time, and quenching is carried out after the mediums are rapidly replaced.

Disclosure of Invention

To the above-mentioned problem that prior art exists, the to-be-solved technical problem of the utility model is: how to design a high-efficient quenching furnace structure can be aimed at a plurality of samples and quench in succession under the condition that the temperature fluctuation is minimum.

In order to solve the technical problem, the utility model adopts the following technical scheme: a high-efficiency quenching furnace structure comprises an upper cover, a furnace tube, a lower cover, a base and a plurality of hooks; the upper cover and the lower cover are respectively positioned above and below the furnace tube, and the upper cover and the lower cover are respectively detachably and hermetically connected with the furnace tube; the upper cover comprises an upper cover shell and a rotating body, the upper cover shell is provided with a central hole and an upper cover vent hole communicated with the furnace tube, and the rotating body is arranged at the bottom of the upper cover shell and is in sealing connection with the upper cover shell; the rotating body comprises a rotatable part and a fixed part, the fixed part is of an annular structure, a circle of groove is formed in the upper surface of the fixed part, the groove and the fixed part are coaxial, a falling notch is formed in the groove, and the falling notch penetrates through the upper surface and the lower surface of the fixed part; the bottom of the rotatable component is provided with a circle of convex edge, the convex edge is provided with a plurality of limiting notches penetrating through the upper surface of the rotatable component, and the convex edge is in sliding fit with the groove; the upper surface of the rotatable part is fixedly connected with a force transmission column, and the top of the force transmission column penetrates through a central hole in the upper cover shell and is in sealed rotatable fit with the central hole; the hooks are hung on the edge of the groove, each hook is correspondingly positioned in the limiting notch, and the top of each hook is in sliding fit with the groove; the base is positioned below the furnace tube and used for supporting the furnace tube, the base is provided with a quenching medium container, and the quenching medium container is opposite to the lower part of the furnace tube.

During implementation, a sample is hung under the hook, then the hook is placed in the groove, then the rotatable part is placed on the fixed part, at the moment, the convex edge of the lower surface of the rotatable part is positioned in the groove, and the hook is positioned in the limiting notch on the convex edge, so that the hook is limited to slide in the groove at will; the upper cover and the lower cover are connected with the furnace tube in a sealing way, and the force transmission column extends out from the top of the upper cover. After heating for a period of time, heat preservation is carried out after the test temperature is reached. After the heat preservation reaches the first set of experimental required time, open the breather valve that upper cover air vent and lower cover air vent are connected, slowly ventilate and guarantee the atmosphere, open the lower cover simultaneously, rotate the power transmission post rapidly, the power transmission post drives rotatable part and rotates, because hanging of couple just is arranged in spacing breach on the edge of recess, when rotatable part rotates, the couple that is arranged in spacing breach also slides in the recess, when falling breach department until a couple slides, this couple then drops from the breach department of falling, get into in the quenching medium container. After the heat preservation reaches the time required by the second group of tests, the force transmission column continues to rotate, the next hook slides to the position where the hook falls, and so on, thereby realizing continuous quenching.

Preferably, the upper cover shell is of a hollow structure, and the upper cover shell is provided with an upper cover water inlet and an upper cover water outlet. The upper cover shell is made of stainless steel, and when the quenching furnace works, circulating water enters from the upper cover water inlet and flows out from the upper cover water outlet, so that the upper cover is prevented from being overhigh in temperature.

Preferably, the lower cover comprises a lower cover door connecting structure, a lower cover door and a clamp lock; the lower cover door connecting structure comprises a lower cover door connecting piece and a mounting plate, the mounting plate is fixed on the base, the lower cover door connecting piece is sleeved on the outer side of the furnace tube and is close to the bottom end of the furnace tube, and the lower cover door connecting piece is fixedly connected with the lower surface of the mounting plate; the lower cover door is rotatably connected with the lower cover door connecting piece; the clamp lock comprises a hanging lug and a lock handle, one end of the hanging lug is fixedly connected to the lower cover door connecting piece, one end of the lock handle is rotatably connected to the lower cover door, and a hanging hole in the other end of the lock handle is matched and fixed with the hanging lug.

Preferably, the lower cover door is of a hollow structure, and a lower cover water inlet and a lower cover water outlet are formed in the lower cover of the lower cover door. The lower cover door is made of stainless steel, and when the quenching furnace works, circulating water enters from the water inlet of the lower cover and flows out from the water outlet of the lower cover, so that the lower cover is prevented from being too high in temperature. The lower cover door is a stainless steel furnace door, one end of the stainless steel furnace door is fixed on the lower cover through a rotating shaft, and the other end of the stainless steel furnace door can be quickly opened through a push-pull type quick clamp lock catch for quick quenching.

Preferably, the lower cover door is provided with an upper cover vent hole communicated with the furnace tube. Both the lower cover vent hole and the lower cover vent hole can be used as an atmosphere control channel in the furnace.

Preferably, the bottom of the hook has a through hole. The quenched sample can be suspended by iron wire through the through hole.

Preferably, the cross section of the force transmission column is multi-deformation. The sliding of the force transmission column during rotation is prevented, and meanwhile, after the force transmission column rotates by a certain angle, the force transmission column can also play a certain limiting role, so that the force transmission column is prevented from rotating, and in addition, the rotating angle of each time can be determined according to the variable of the force transmission column.

Preferably, one end of the force transmission column, which is positioned outside the upper cover, is connected with a rotating handle.

Compared with the prior art, the utility model discloses at least, following advantage has:

1. the utility model discloses well upper cover and lower cover all have recirculated cooling water passageway, prevent that the bell temperature is too high.

2. The upper cover and the lower cover are both provided with vent holes, and the vent holes of the upper cover and the lower cover can be respectively used as vent holes and exhaust holes, so that inert gas can be introduced or vacuum pumping can be carried out, and the atmosphere during quenching can be ensured.

3. Through the setting of rotator, can hang multiunit sample simultaneously, every group sample is the same sample of heat preservation time, has greatly improved the efficiency of whole quenching flow like this.

4. The suspended sample can be vertical due to the arrangement of the rotating body, so that the lower cover can be quickly opened, the sample can be directly quenched by rotating the rotating handle, the operation is convenient and rapid, and the accuracy of quenching temperature is ensured.

5. The medium below can be replaced quickly, different quenching medium test samples can be quenched continuously in the same heat preservation time, and the accuracy of the test result is guaranteed.

Drawings

Fig. 1 is a schematic perspective view of a high-efficiency quenching furnace.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a cross-sectional view taken at the point of fig. 2A-a.

Fig. 4 is a perspective view of the rotating body.

Fig. 5 is a front view of fig. 5.

Fig. 6 is a left side view of fig. 5.

Fig. 7 is a top view of fig. 5.

Fig. 8 is a cross-sectional view at fig. 7B-B.

Fig. 9 is a schematic structural view of the hook.

In the figure, an upper cover-10, an upper cover water inlet-12, a rotating body-13, a rotatable component-131, a convex edge-132, a fixed component-133, a limit notch-134, a groove-135, a force transmission column-136, a falling notch-137, an upper cover water outlet-14 and a rotating handle 15; furnace tube-20, lower cover door connecting piece-31, mounting plate-32, lower cover door-33, hanging lug-35, lock handle-37, base-40, quenching medium container 41, hanging hook-50 and furnace body outer cavity 60.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1-9, the utility model discloses mainly heat to the same temperature to needs, when keeping warm work piece or the test sample of different time quenching operation, heat together with the short sample of heat preservation time in earlier stage to the longer sample of heat preservation time, can save heat time like this, improve quenching efficiency greatly, and guarantee that the quenching process does not have the influence to other heating samples. The total heat preservation time is the heat preservation time of the sample with the longest heat preservation time. The method can also be used for performing quenching comparison tests by rapidly switching media when different media are required to be researched to influence quenching performance and the same media sample is taken as a group and heated at the same time.

A high-efficiency quenching furnace structure comprises an upper cover 10, a furnace tube 20, a lower cover, a base 40 and a plurality of hooks 50;

the upper cover 10 and the lower cover are respectively positioned above and below the furnace tube 20, and the upper cover 10 and the lower cover are respectively detachably and hermetically connected with the furnace tube 20; the furnace tube 20 is arranged in the outer chamber 60 of the furnace body except for the parts which need to be connected with the upper cover 10 and the lower cover.

The upper cover 10 comprises an upper cover shell and a rotating body 13, wherein the upper cover shell is provided with a central hole and an upper cover vent hole communicated with the furnace tube 20; the rotating body 13 is arranged at the bottom of the upper cover shell and is connected with the upper cover shell in a sealing way; in specific implementation, the bottom edge of the upper cover 10 is slightly larger than the top of the furnace tube, so that the furnace tube can be sealed through the furnace tube flange. The inner diameter of the furnace tube flange is the same as the outer diameter of the furnace tube. The screw hole on the furnace tube flange is connected with the bottom of the upper cover, and the middle of the furnace tube flange and the upper cover are sealed by a high-temperature resistant silica gel pad when the furnace tube flange and the upper cover are connected.

The rotating body 13 comprises a rotatable component 131 and a fixed component 133, the fixed component 133 is of a ring-shaped structure, a circle of groove 135 is formed in the upper surface of the fixed component 133, the groove 135 is coaxial with the fixed component 133, a falling notch 137 is formed in the groove 135, and the falling notch 137 penetrates through the upper surface and the lower surface of the fixed component 133. The bottom of the rotatable member 131 has a ring of protruding edges 132, and the protruding edges 132 have a plurality of position-limiting notches 134 penetrating the upper surface of the rotatable member 131, and the protruding edges 132 are slidably engaged with the grooves 135. The upper surface of the rotatable part 131 is fixedly connected with a force transmission column 136, and the top of the force transmission column 136 passes through a central hole in the upper cover shell and is in sealed and rotatable fit with the central hole; the hooks 50 are hung on the edge of the groove and hung on the edge of the groove 135, each hook 50 is correspondingly positioned in the limiting notch 134, and the top of each hook 50 is in sliding fit with the groove 135.

The base 40 is located below the furnace tube 20 and is used for supporting the furnace tube 20, the quenching medium container 41 is arranged on the base 40, and the quenching medium container 41 is opposite to the lower part of the furnace tube 20. In specific implementation, the base 40 comprises a bottom plate and four legs fixed on four corners of the bottom plate, the tops of the four legs respectively support four corners of the outer cavity 60 of the furnace body, and the quenching medium container 41 is placed on the bottom plate.

In practice, a sample is hung under the hook 50, then the hook 50 is placed in the groove 135, and then the rotatable member 131 is placed on the fixed member 133, wherein the convex edge 132 of the lower surface of the rotatable member 131 is positioned in the groove 135, and the hook 50 is positioned in the limiting notch 134 on the convex edge 132, so that the hook 50 is limited from sliding freely in the groove 135; the upper cover 10 and the lower cover are connected with the furnace tube 20 in a sealing way, and the force transmission column 136 extends out from the top of the upper cover 10. After heating for a period of time, heat preservation is carried out after the test temperature is reached. After the heat preservation reaches the first group of test requirement time, a vent valve connected with the upper cover vent hole and the lower cover vent hole is opened, the air is slowly ventilated to ensure the atmosphere, meanwhile, the lower cover door 33 is opened, the force transmission column 136 is rapidly rotated, the force transmission column 136 drives the rotatable component 131 to rotate, as the hook 50 is hung on the edge of the groove 135 and is positioned in the limiting notch 134, when the rotatable component 131 rotates, the hook 50 positioned in the limiting notch 134 also slides in the groove 135 until one hook 50 slides to the falling notch 137, the hook 50 falls down from the falling notch 137, enters the quenching medium container 41, the force transmission column 136 continues to rotate, and the next hook 50 falls down when sliding to the falling notch 137, thereby realizing continuous quenching.

Specifically, the upper cover shell is of a hollow structure, and an upper cover water inlet 12 and an upper cover water outlet 14 are arranged on the upper cover shell. The upper cover shell is made of stainless steel, and when the quenching furnace works, circulating water enters from the upper cover water inlet and flows out from the upper cover water outlet, so that the upper cover is prevented from being overhigh in temperature.

Specifically, the lower cover of the lower cover door 33 is of a hollow structure, and the lower cover of the lower cover door 33 is provided with a lower cover water inlet and a lower cover water outlet. The lower cover is made of stainless steel, and when the quenching furnace works, circulating water enters from the water inlet of the lower cover and flows out from the water outlet of the lower cover, so that the lower cover is prevented from being too high in temperature. The lower cover is a stainless steel furnace door, one end of the stainless steel furnace door is fixed on the lower cover through a rotating shaft, and the other end of the stainless steel furnace door can be quickly opened through a push-pull type quick clamp lock catch for quick quenching.

Specifically, the lower cover comprises a lower cover door connecting structure, a lower cover door 33 and a clamp lock; the lower cover door connecting structure comprises a lower cover door connecting piece 31 and a mounting plate 32, the mounting plate 32 is fixed on the base 40, the lower cover door connecting piece 31 is sleeved on the outer side of the furnace tube 20 and is close to the bottom end of the furnace tube 20, and the lower cover door connecting piece 31 is fixedly connected with the lower surface of the mounting plate 32; the lower cover door 33 is rotatably connected with the lower cover door connecting piece 31; the clamp lock comprises a hanging lug 35 and a lock handle 37, one end of the hanging lug 35 is fixedly connected to the lower cover door connecting piece 31, one end of the lock handle 37 is rotatably connected to the lower cover door 33, and a hanging hole in the other end of the lock handle 37 is matched and fixed with the hanging lug 35; the lower cover door 33 is provided with an upper cover vent hole communicated with the furnace tube 20. So set up can be convenient quick open and close lower cover door 33, reduce the temperature loss.

Specifically, the lower cover is provided with a lower cover vent hole. Both the lower cover vent hole and the lower cover vent hole can be used as an atmosphere control channel in the furnace.

Specifically, the bottom of the hook 50 has a through hole. The quenched sample can be suspended by iron wire through the through hole.

Specifically, the cross section of the force transmission column 136 is multi-deformed. Prevent that the power transmission post 136 from sliding when rotating, simultaneously can also play certain limiting displacement after the power transmission post 136 rotates certain angle, prevent the power transmission post 136 gyration, can also confirm every rotation angle according to the variable of power transmission post 136 in addition

Specifically, the force transmission column 136 is connected to the rotating handle 15 at one end of the upper cover 10.

The utility model discloses high-efficient quenching furnace structure's use as follows:

before heating, samples needing heat preservation and heating for the same time can be hung at the bottom of one hook 50 through an iron wire or a steel wire, then the top of the hook 50 is hung in the groove 135, and six limiting notches 134 are formed in the rotatable component 131, so that six groups of samples can be hung. After the sample is hung, the upper cover is fixed at the upper end of the furnace tube 20 through the furnace tube flange, and the lower cover door 33 is locked and closed through the quick clamp. The water passage device is opened to perform water passage cooling on the upper cover 10 and the lower cover door 33, and after the interior of the furnace tube 20 is evacuated through the lower cover vent hole, the lower cover vent hole is closed. And introducing inert gas from the vent hole of the upper cover according to the requirements of the test or quenching atmosphere. The gas pressure can be observed through a vacuum meter externally connected with the vent hole of the upper cover, and the ventilation is stopped after the atmospheric pressure is reached.

And (3) heating, preserving heat after the test temperature is reached, opening a vent valve connected with an upper cover vent hole and a lower cover vent hole after the heat preservation reaches the first group of test required time, slowly ventilating to ensure atmosphere, simultaneously opening the lower cover, rapidly rotating the rotary handle 15, and rapidly closing the lower cover after the first group of samples fall, thus finishing the first group of tests.

If the medium needs to be replaced for comparison, the lower furnace cover does not need to be closed, after the quenching medium container 41 is directly replaced, the rotating handle 15 is quickly rotated, and after the next test sample falls into the medium of the quenching medium container 41, the lower cover is quickly closed.

Finally, it is noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims (8)

1. A high-efficient quenching furnace structure which characterized in that: comprises an upper cover (10), a furnace tube (20), a lower cover, a base (40) and a plurality of hooks (50);

the upper cover (10) and the lower cover are respectively positioned above and below the furnace tube (20), and the upper cover (10) and the lower cover are respectively detachably and hermetically connected with the furnace tube (20);

the upper cover (10) comprises an upper cover shell and a rotating body (13), the upper cover shell is provided with a central hole and an upper cover vent hole communicated with the furnace tube (20), and the rotating body (13) is arranged at the bottom of the upper cover shell and is in sealing connection with the upper cover shell;

the rotating body (13) comprises a rotatable component (131) and a fixed component (133), the fixed component (133) is of an annular structure, a circle of groove (135) is formed in the upper surface of the fixed component (133), the groove (135) and the fixed component (133) are coaxial, a falling notch (137) is formed in the groove (135), and the falling notch (137) penetrates through the upper surface and the lower surface of the fixed component (133);

the bottom of the rotatable component (131) is provided with a circle of convex edge (132), the convex edge (132) is provided with a plurality of limiting notches (134) penetrating through the upper surface of the rotatable component (131), and the convex edge (132) is in sliding fit with the groove (135);

the upper surface of the rotatable part (131) is fixedly connected with a force transmission column (136), and the top of the force transmission column (136) penetrates through a central hole in the upper cover shell and is in sealed rotatable fit with the central hole;

the hooks (50) are hung on the edge of the groove (135), each hook (50) is correspondingly positioned in the limiting notch (134), and the top of each hook (50) is in sliding fit with the groove (135);

the base (40) is located below the furnace tube (20) and used for supporting the furnace tube (20), the quenching medium container (41) is arranged on the base (40), and the quenching medium container (41) is opposite to the lower portion of the furnace tube (20).

2. The high efficiency quench furnace structure of claim 1, wherein: the upper cover shell is of a hollow structure, and an upper cover water inlet (12) and an upper cover water outlet (14) are formed in the upper cover shell.

3. The high efficiency quench furnace structure of claim 1, wherein: the lower cover comprises a lower cover door connecting structure, a lower cover door (33) and a clamp lock;

the lower cover door connecting structure comprises a lower cover door connecting piece (31) and a mounting plate (32), the mounting plate (32) is fixed on the base (40), the lower cover door connecting piece (31) is sleeved on the outer side of the furnace tube (20) and is close to the bottom end position of the furnace tube (20), and the lower cover door connecting piece (31) is fixedly connected with the lower surface of the mounting plate (32);

the lower cover door (33) is rotatably connected with the lower cover door connecting piece (31);

the clamp lock comprises a hanging lug (35) and a lock handle (37), one end of the hanging lug (35) is fixedly connected to the lower cover door connecting piece (31), one end of the lock handle (37) is rotatably connected to the lower cover door (33), and a hanging hole in the other end of the lock handle (37) is matched and fixed with the hanging lug (35).

4. A high efficiency quench furnace structure as claimed in claim 3 wherein: the lower cover door (33) is provided with an upper cover vent hole communicated with the furnace tube (20).

5. The high-efficiency quenching furnace structure according to claim 3 or 4, wherein: the lower cover of the lower cover door (33) is of a hollow structure, and the lower cover of the lower cover door (33) is provided with a lower cover water inlet and a lower cover water outlet.

6. The high efficiency quench furnace structure of claim 5, wherein: the bottom of the hook (50) is provided with a through hole.

7. The high efficiency quench furnace structure of claim 5, wherein: the cross section of the force transmission column (136) is polygonal.

8. The high efficiency quench furnace structure of claim 7, wherein: one end of the force transmission column (136) positioned outside the upper cover (10) is connected with a rotary handle (15).

Images