Steam treatment device for metal parts

Abstract

The present application relates to the field of metal treatment, and discloses a steam treatment device for metal parts, comprising a furnace cylinder, wherein a furnace cover and a furnace bottom are detachably arranged at the upper end and the lower end of the furnace cylinder, respectively; a lifting / lowering device is arranged below the furnace bottom, and a steam nozzle is arranged on the side surface of the furnace bottom close to the furnace cover; a vertical column is fixed on the furnace bottom, the end of the vertical column distant from the furnace bottom extends into the furnace cylinder, and an internal bevel gear is fixed on the vertical column; a rotating drum is sleeved on the vertical column, and the rotating drum is coaxially and rotatably arranged relative to the vertical column; a plurality of bearing rods are distributed around the circumference of the rotating drum, and the bearing rods are rotatably connected to the rotating drum; one end of each bearing rod is located in the furnace cylinder and fixedly provided with a plurality of clamps for fixing metal parts, and the other end thereof is located in the rotating drum and coaxially and fixedly provided with an external bevel gear; and the top end of the rotating drum is coaxially fixed to the furnace cover, and an inclined pressure relief hole is formed in the portion of the upper surface of the furnace cover away from the rotation axis thereof and passes through the portion. In the present application, during steam treatment, the metal parts undergo multi-dimensional rotation, allowing for more thorough steam treatment of the metal parts.

Description

Metal part steam treatment device TECHNICAL FIELD

[0001] The present application relates to the field of metal treatment, in particular to a metal part steam treatment device. BACKGROUND

[0002] Sprocket is a kind of wheel with embedded toothed chain teeth, which is widely used in transmission equipment field. The product is mostly produced by powder metallurgy technology.

[0003] The structure of the sprocket is shown in Figure 1. In order to improve the appearance and corrosion resistance of the sprocket, the sprocket made of powder metallurgy technology needs to be electroplated. However, there are pores inside and outside the powder metallurgy products. The electroplating solution remaining in the pores after electroplating cannot be completely removed, which will cause corrosion.

[0004] In order to reduce or even prevent the corrosion caused by residual electroplating solution, the sprocket is subjected to steam treatment before electroplating, that is, the sprocket is heated in superheated steam at 500-560 DEG C for a certain period of time. Under the conditions of thermodynamics and dynamics, a dense ferric oxide film is formed on the surface and in the pores. After such treatment, even if the sprocket is not electroplated, it can improve the rust prevention, wear resistance or high pressure penetration resistance.

[0005] For the existing steam treatment equipment, a furnace body is provided, the furnace body is open at the upper end, a steam nozzle is arranged at the bottom in the furnace body, a bearing frame is arranged in the furnace body, a furnace cover is arranged at the opening of the furnace body, a motor is arranged on the furnace cover, the motor is in transmission connection with the bearing frame to drive the bearing frame to rotate coaxially in the furnace body.

[0006] When the existing steam treatment equipment is used, the sprocket is horizontally placed on the bearing frame, the steam flows from the bottom upwards, the motor drives the bearing frame and the sprocket on the bearing frame to rotate horizontally, the ring groove and the top surface of the sprocket are not easy to contact with the steam, which easily causes the problem of insufficient steam treatment of the sprocket at the ring groove and the top surface.

[0007] SUMMARY

[0008] In order to ensure that the metal parts are in full contact with the steam, the present application provides a metal part steam treatment device.

[0009] The metal part steam treatment device provided by the present application adopts the following technical scheme:

[0010] The utility model provides a kind of metal parts steam treatment device, including furnace cylinder, the furnace cylinder upper and lower ends are separately provided with furnace cover and furnace bottom with separable, the lower of furnace bottom is provided with lifting device for driving the lifting movement of furnace bottom, the side of furnace bottom close to furnace cover is provided with steam nozzle, fixed with column on the furnace bottom, the end of column away from furnace bottom extends to the furnace cylinder, coaxially fixed with inner bevel gear on the column, the sleeve of column is set with rotating drum, rotating drum is coaxially rotationally arranged relative to column, rotating drum circumferential array distribution has a plurality of bearing rods, bearing rod rotationally connects on rotating drum, one end of bearing rod is located in furnace cylinder and is fixed with a plurality of fixed metal parts clamps, the other end is located in rotating drum and is coaxially fixed with outer bevel gear matched with inner bevel gear, the top of rotating drum is coaxially fixed with furnace cover, the upper surface of furnace cover away from its rotating axis is penetrated and is provided with inclined pressure relief hole for facilitating the rotation of furnace cover.

[0011] By adopting the above technical scheme, the metal parts are clamped on the clamp, then steam is continuously delivered into the furnace cylinder through the steam nozzle and the metal parts are heated by starting the induction coil layer, and the excess steam is sprayed out from the inclined pressure relief hole, while the furnace cover is pushed to rotate, the rotating drum is driven to rotate by the furnace cover, and the metal parts on the bearing rods are rotated around the axis of the rotating drum by the rotating drum; at the same time, the metal parts are rotated around the axis of the bearing rods by the cooperation of the inner bevel gear and the outer bevel gear, so as to reduce the steam treatment dead angle of the metal parts and improve the steam treatment effect of the metal parts; in addition, the rotation of the rotating drum is realized by the jetting force of steam, which avoids the use of motor, saves energy and protects the environment, and simplifies the structure.

[0012] Preferably, the inclined pressure relief hole is provided with a plurality of inclined pressure relief holes, and the plurality of inclined pressure relief holes are circumferentially arrayed on the edge of the upper surface of the furnace cover.

[0013] By adopting the above technical scheme, the principle of lever is utilized, and the same steam jetting force and the same mass of furnace cover are used, and the farther the rotation axis of the furnace cover is from the rotation axis, the more conducive to pushing the furnace cover to rotate.

[0014] Preferably, the upper surface of the furnace cover is rotationally provided with a cover plate, and the cover plate covers the opening of the inclined pressure relief hole.

[0015] By adopting the above technical scheme, the cover plate closes the inclined pressure relief hole, so as to maintain the pressure in the furnace cylinder.

[0016] Preferably, the upper surface of the furnace cover is fixed with a guide rod, the guide rod is slidably connected with a pressing plate in the vertical direction, and the edge of the pressing plate is pressed on the cover plate.

[0017] By adopting the above technical scheme, the weight of the pressing plate is adjusted to change the pressure of the steam treatment in the furnace cylinder.

[0018] Preferably, one end of the guide rod away from the furnace cover is provided with a threaded segment, and a limiting nut for limiting the lifting stroke of the pressing plate is connected on the threaded segment.

[0019] By adopting the above technical scheme, the cover plate is prevented from being turned over excessively and causing failure.

[0020] Preferably, the inclined pressure relief hole is in the shape of a straight slot, and the inclined pressure relief hole is arranged along the radial direction of the furnace cover.

[0021] By adopting the above technical scheme, the steam injection force is fully utilized to drive the rotation of the furnace cover.

[0022] Preferably, the clamp includes a clamp seat, a clamp seat is provided with a clamp on one side for fixing the clamp seat on the carrier rod, and a left clamp jaw and a right clamp jaw are slidably connected on the other side, and a compression spring is arranged between the left clamp jaw and the right clamp jaw.

[0023] By adopting the above technical scheme, the left clamp jaw and the right clamp jaw are used to clamp the metal parts.

[0024] Preferably, the left clamp jaw and the right clamp jaw are provided with a pinching part on the side close to each other.

[0025] By adopting the above technical scheme, the pinching part is used to facilitate clamping the metal parts on the carrier rod.

[0026] Preferably, a plurality of carrier rods form multiple layers, and the clamping angles of the clamps on the two carrier rods of adjacent layers are different by ninety degrees.

[0027] By adopting the above technical scheme, it is beneficial to place more metal parts in the furnace cylinder under the condition that the height of the furnace cylinder is limited.

[0028] Preferably, the furnace cylinder includes an outer shell, a heat insulation layer, a heat resistant layer, an induction coil layer and a ceramic inner layer arranged from the outside to the inside.

[0029] By adopting the above technical scheme, the heating and heat preservation of the steam treatment of the metal parts are realized.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. The structure is simple; the present application utilizes the injection force of the discharged steam to drive the rotation of the furnace cover, and then drives the metal parts to rotate in the furnace cylinder through the rotating drum and the carrier rod, without the need to additionally provide a separate driving motor;

[0032] 2. The metal parts are fully heat treated; through the cooperation between the outer bevel gear and the inner bevel gear, after the furnace cover rotates, the bearing rod rotates along the axis of the rotating drum, and also rotates along the axis of the bearing rod itself, that is, the metal parts on the clamp rotate and overturn during the steam treatment in the furnace drum, the metal parts are more fully contacted with the flowing steam, the dead angle of steam treatment is less, and the effect of steam treatment is better;

[0033] 3. Reduce the waste of steam, energy saving and environmental protection; in the scheme of the application, during the early stage of steam delivery into the furnace drum, the inclined pressure relief hole is closed by the cover plate, at this time, the steam continues to be delivered into the furnace drum, and the air pressure in the furnace drum continues to rise, until the required air pressure is reached, at this time, the air pressure is enough to push the cover plate to relieve pressure, and then the steam is relieved, instead of discharging the steam at the beginning;

[0034] 4. The pressure condition of steam treatment is convenient to adjust; because different metal parts require different pressure conditions of steam treatment, the pressure plate is arranged in the scheme of the application, and the air pressure in the furnace drum is adjusted by changing the weight of the pressure plate. BRIEF DESCRIPTION OF DRAWINGS

[0035] Fig. 1 is a schematic diagram of the overall structure of a metal part chain wheel in the prior art;

[0036] Fig. 2 is a schematic diagram of the overall structure of a metal part steam treatment device according to an embodiment of the application;

[0037] Fig. 3 is a sectional view of a metal part steam treatment device according to an embodiment of the application (omitting the lifting device);

[0038] Fig. 4 is an enlarged view of part A in Fig. 2;

[0039] Fig. 5 is a schematic diagram of the structure of the furnace cover according to an embodiment of the application;

[0040] Fig. 5 is a schematic diagram of the structure of the furnace cover according to an embodiment of the application;

[0041] The application will be further described in detail below with reference to Figs. 2-5.

[0042] The application discloses a metal part steam treatment device. ​

[0043] Referring to FIG. 2 and FIG. 3, a metal parts steam treatment device, comprising a furnace cylinder 2, the furnace cylinder 2 comprises an outer shell 20, a heat preservation layer 21, a heat resistant layer 22, an induction coil layer 23 and a ceramic inner layer 24 arranged coaxially from outside to inside, the furnace cylinder 2 is vertically fixed, a heating cavity is vertically provided through the furnace cylinder 2, the furnace cylinder 2 is provided with a furnace cover 1 and a furnace bottom 4 at the upper and lower ends respectively, the radius of the furnace cover 1 and the furnace bottom 4 is matched with the hole diameter of the heating cavity, the furnace bottom 4 is in sealing contact with the inner wall of the heating cavity, and the furnace bottom 4 can move up and down in the furnace cylinder 2, a lifting device 17 for driving the furnace bottom 4 to move up and down is arranged below the furnace bottom 4, the lifting device 17 is a hydraulic cylinder or an elevator, etc., a steam cavity is provided in the furnace bottom 4, a steam nozzle 5 is arranged on the side of the furnace bottom 4 close to the furnace cover 1, a vertical column 6 is fixed coaxially and vertically on the side of the furnace bottom 4 close to the furnace cover 1, the end of the vertical column 6 away from the furnace bottom 4 extends into the furnace cylinder 2, a plurality of internal bevel gears 7 are fixed coaxially along the length direction of the vertical column 6, the plurality of internal bevel gears 7 are distributed equidistantly, a rotating drum 8 is coaxially sleeved on the vertical column 6, the rotating drum 8 is coaxially and rotatably arranged relative to the vertical column 6, a plurality of bearing rods 9 are rotatably connected to the rotating drum 8, the plurality of bearing rods 9 are arranged in a multi-layer structure, each layer includes four bearing rods 9, and the four bearing rods 9 of each layer are circumferentially arranged on the side of the rotating drum 8, the bearing rods 9 are rotatably connected to the rotating drum 8, one end of the bearing rods 9 is located in the furnace cylinder 2 and is fixed with a plurality of clamps 3 for fixing metal parts, the other end of the bearing rods 9 is coaxially fixed with an external bevel gear 10 matched with the internal bevel gear 7 in the rotating drum 8, the top end of the rotating drum 8 is coaxially fixed with the furnace cover 1, and an inclined pressure relief hole 11 is provided through the upper surface of the furnace cover 1 away from the rotation axis thereof for facilitating the rotation of the furnace cover 1.

[0044] Referring to FIG. 2, FIG. 3 and FIG. 5, a plurality of inclined pressure relief holes 11 are provided, the plurality of inclined pressure relief holes 11 are circumferentially arranged on the edge of the upper surface of the furnace cover 1, each inclined pressure relief hole 11 is in the shape of a straight slot, and each inclined pressure relief hole 11 is arranged along the radial direction of the furnace cover 1, a cover plate 12 is rotatably connected to the upper surface of the furnace cover 1, the surface of the cover plate 12 is in the shape of a circular arc segment, the rotation axis of the cover plate 12 is arranged along the radial direction of the furnace cover 1, and the cover plate 12 covers the opening of the inclined pressure relief hole 11. A guide rod 13 is fixed at the center of the upper surface of the furnace cover 1, a pressing plate 14 is slidably connected to the guide rod 13 in the vertical direction, the pressing plate 14 is a circular plate, the pressing plate 14 is inserted into the guide rod 13, and the edge of the pressing plate 14 is pressed against the cover plate 12. A threaded section 15 is integrally arranged at the end of the guide rod 13 away from the furnace cover 1, a limiting nut 16 is connected to the threaded section 15 for limiting the upward stroke of the pressing plate 14, the limiting nut 16 limits the height of the upward sliding of the pressing plate 14, thereby indirectly limiting the opening amplitude of the cover plate 12.

[0045] With reference to FIGS. 2 and 4, the clamp 3 comprises a clamp base 30, one side of the clamp base 30 is fixed with a clamp hoop 31 for fixing the clamp base 30 on the carrier rod 9, the position of the clamp base 30 on the carrier rod 9 can be adjusted through the clamp hoop 31, the other side is slidably connected with a left clamp jaw 32 and a right clamp jaw 33, a compression spring 34 is installed between the left clamp jaw 32 and the right clamp jaw 33, one side of the left clamp jaw 32 and the right clamp jaw 33 close to each other is provided with a pinch part 35, in use, the left clamp jaw 32 and the right clamp jaw 33 are close to each other by hand pinching on the pinch part 35, so as to clamp the chain wheel, the clamping angles of the clamps 3 on the two carrier rods 9 of the adjacent layers are different by ninety degrees, so that more products can be accommodated in the furnace cylinder 2 under the condition of the same height.

[0046] The implementation principle of the metal part steam treatment device in the embodiment of the application is as follows: in use, the furnace cylinder 2 is fixed on a shelf at a high position or is buried underground, the lifting device 17 is started to drive the furnace bottom 4 to separate from the furnace cylinder 2, and then the metal part is loaded on the clamp 3; after the loading is completed, the lifting device 17 is started again to drive the furnace bottom 4 to move to the bottom of the furnace cylinder 2, and then the induction coil layer 23 is started to heat the metal part and continuously deliver steam into the furnace cylinder 2 through the steam nozzle 5, in the early stage of delivering steam, the pressure in the furnace cylinder 2 does not reach the required strength, the cover plate 12 closes the inclined pressure relief hole 11, and until the pressure in the furnace cylinder 2 reaches the required strength, at this time, the steam pressure drives the cover plate 12 to spray out, and one side of the cover plate 12 abuts, so that the steam is obliquely sprayed out, and the spraying force drives the furnace cover 1 to rotate; after the steam treatment is completed, the lifting device 17 is started again to drive the furnace bottom 4 to separate from the furnace cylinder 2, and finally the metal part is taken off from the clamp 3.

[0047] The metal part steam treatment device in the embodiment of the application has at least the following beneficial technical effects:

[0048] Firstly, the structure is simplified; when the steam treatment is performed by using the scheme of the application, the steam is continuously delivered into the furnace cylinder 2, the steam after the heat treatment is sprayed out through the inclined pressure relief hole 11, the spraying force of the discharged steam drives the furnace cover 1 to rotate, and then the metal part is driven to rotate in the furnace cylinder 2 through the rotating drum 8 and the carrier rod 9, without the need of additionally arranging a separate driving motor;

[0049] Secondly, the heat treatment of the metal part is sufficient; through the cooperation between the outer bevel gear 10 and the inner bevel gear 7, after the furnace cover 1 rotates, the carrier rod 9 rotates around the axis of the rotating drum 8 and also rotates around the axis of the carrier rod 9 itself, that is, the metal part on the clamp 3 is also turned over in the process of steam treatment in the furnace cylinder 2, the metal part contacts the flowing steam more sufficiently, and the steam treatment effect is better;

[0050] Thirdly, the waste of steam is reduced, energy saving and environmental protection; in the scheme of the application, the inclined pressure relief hole 11 is closed by the cover plate 12 in the early stage of steam delivery to the furnace cylinder 2, at this time, the steam continues to be delivered to the furnace cylinder 2, the air pressure in the furnace cylinder 2 continues to rise, until the required air pressure is reached, at this time, the air pressure is enough to push the cover plate 12 to release pressure, and then the steam is released, instead of discharging the steam at the beginning;

[0051] Fourthly, the pressure condition of steam treatment is convenient to adjust; because the required pressure condition of steam treatment of different metal parts is different, the pressure plate 14 is arranged in the scheme of the application, and the air pressure in the furnace cylinder 2 is adjusted by changing the pressure plate 14 with different weights.

[0052] The above are preferred embodiments of the application, which do not limit the protection scope of the application, therefore: any equivalent changes made on the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A metal part steam treatment apparatus, characterized by: The utility model provides a kind of furnace, including furnace cylinder (2), the furnace cylinder (2) is separately provided with furnace cover (1) and furnace bottom (4) on both ends, the bottom of furnace bottom (4) is provided with lifting device (17) for driving the lifting movement of furnace bottom (4), the side of furnace bottom (4) close to furnace cover (1) is provided with steam nozzle (5), the fixed column (6) of furnace bottom (4) is fixed on, the end of fixed column (6) away from furnace bottom (4) extends to furnace cylinder (2) inside, coaxially fixed inner bevel gear (7) on fixed column (6), sleeve fixed cylinder (8) on fixed column (6), cylinder (8) is coaxially rotationally arranged relative to fixed column (6), a plurality of bearing rods (9) are distributed in the circumferential direction of cylinder (8), bearing rod (9) is rotationally connected on cylinder (8), the one end of bearing rod (9) is located in furnace cylinder (2) and is fixed with a plurality of fixed metal parts clamps (3), the other end is located in cylinder (8) and is coaxially fixed with outer bevel gear (10) matched with inner bevel gear (7), the top of cylinder (8) is coaxially fixed with furnace cover (1), the upper surface of furnace cover (1) is away from its rotating axis and is provided with inclined pressure relief hole (11) for facilitating the rotation of furnace cover (1).

2. A metal part steam treatment apparatus as defined in claim 1, wherein: The inclined pressure relief hole (11) is provided with a plurality of inclined pressure relief holes (11) circumferentially arranged on the edge of the upper surface of the furnace cover (1).

3. A metal part steam treatment apparatus as claimed in claim 1 or 2, wherein: The upper surface of the furnace cover (1) is rotationally provided with a cover plate (12), and the cover plate (12) covers the opening of the inclined pressure relief hole (11).

4. A metal part steam treatment apparatus as defined in claim 3, wherein: The upper surface of the furnace cover (1) is fixed with a guide rod (13), and the guide rod (13) is vertically slidably connected with a pressing plate (14).

5. A metal part steam treatment apparatus as defined in claim 4, wherein: The end of the guide rod (13) away from the furnace cover (1) is provided with a threaded section (15), and the threaded section (15) is connected with a limiting nut (16) for limiting the upward travel of the pressing plate (14).

6. A metal part steam treatment apparatus as defined in claim 1, wherein: The inclined pressure relief hole (11) is in the shape of a straight slot, and the inclined pressure relief hole (11) is arranged along the radial direction of the furnace cover (1).

7. A metal part steam treatment apparatus as defined in claim 1, wherein: The clamp (3) includes a clamp seat (30), one side of the clamp seat (30) is provided with a clamp (31) for fixing the clamp seat (30) on the bearing rod (9), the other side is slidably connected with a left jaw (32) and a right jaw (33), and a compression spring (34) is arranged between the left jaw (32) and the right jaw (33).

8. A metal part steam treatment apparatus as defined in claim 7, wherein: The side of the left jaw (32) and the right jaw (33) close to each other is provided with a pinching part (35).

9. A metal part steam treatment apparatus as claimed in claim 7 or 8, wherein: A plurality of bearing rods (9) form multiple layers, and the clamping angles of the clamps (3) on the two bearing rods (9) of adjacent layers differ by ninety degrees.

10. The apparatus of claim 1, wherein: The furnace cylinder (2) includes an outer shell (20), a heat insulation layer (21), a heat resistant layer (22), an induction coil layer (23), and a ceramic inner layer (24) arranged from outside to inside.

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