A container corner fitting annealing device

Abstract

The present invention discloses an annealing device for container corner fittings, comprising: a normalizing furnace, a furnace lining, heating elements, a waste heat recovery furnace, a transmission structure, guide rails, and a material tray; a side circulation guiding structure. A sandwich layer is provided on the outer side of the normalizing furnace, and the sandwich layer is connected to the outside through a blower. The front half of the heating element is located inside the normalizing furnace, and the rear half of the heating element is located inside the sandwich layer. The side circulation guiding structure includes two side guiding frames arranged inside the normalizing furnace. A first connecting piece and a second connecting piece are respectively movably connected to the inner sides of the side guiding frames, and the connecting pieces are driven by a pushing component arranged on the sandwich layer. The present invention can make the annealing of the inner and outer regions of the corner fittings uniform and avoid the cracking phenomenon caused by uneven temperature.

Description

Technical Field

[0001] The present invention relates to an annealing device, in particular to an annealing device for container corner fittings. Background Art

[0002] The corner fittings of a container, also known as box corners or lifting corners, are mainly used at each corner of the container. They are mainly cast in the form of sand casting. After casting, the temperature of the container corner fittings is above a thousand degrees. If they are cooled by a sudden cooling method, it is easy to cause cracks in the corner fittings and make them brittle as a whole. Cooling too quickly is not conducive to the stability of the corner fittings. Therefore, in the existing casting process, annealing is often carried out after sand casting.

[0003] In traditional technology during annealing, the corner fittings are usually placed on a tray, and the tray is slid into the annealing furnace. The annealing furnace uses steam for circulating annealing. However, although this annealing method can achieve the effect of cooling, the energy consumption is large. Therefore, in some existing technologies, electric heating tubes or electric heating glass are used, and annealing is carried out by means of thermal radiation, thereby improving the energy utilization rate. Thermal radiation is more energy-saving than traditional wind heating. However, since the corner fittings have openings, the inner wall of the opening has a certain concave contour and amplitude. Although thermal radiation has a certain penetrability, it is also difficult to penetrate the relatively thick corner fittings, resulting in uneven temperatures inside and outside the corner fittings during annealing, and cracks are likely to appear inside, making it relatively unstable during actual use and easily affecting the quality of the container.

[0004] Therefore, the present case aims to provide an annealing device for container corner fittings, which can not only heat the corner fittings by thermal radiation, but also accurately heat and anneal the inner area of the corner fittings, so as to make the annealing of the inner and outer areas of the corner fittings uniform and avoid cracking caused by uneven temperature. Summary of the Invention

[0005] The present invention provides an annealing device for container corner fittings, which can effectively solve the above problems.

[0006] The present invention is implemented as follows:

[0007] An annealing device for container corner fittings includes:

[0008] A normalizing furnace for annealing, the inner side of the normalizing furnace is provided with a furnace lining, and a plurality of heating elements are arranged in the furnace lining. The front and rear ends of the normalizing furnace are opened and closed through furnace doors;

[0009] A waste heat recovery furnace arranged at the front end of the normalizing furnace, and the side of the waste heat recovery furnace is connected to the normalizing furnace through a heat conduction pipe;

[0010] A transmission structure, including guide rails arranged inside the normalizing furnace and the waste heat recovery furnace, and a tray for loading corner fittings is slidably installed on the guide rails;

[0011] Side circulation guiding structure. There is a sandwich layer on the outside of the normalizing furnace. The sandwich layer is connected to the outside through a blower. The first half of the heating element is located inside the normalizing furnace, and the second half of the heating element is located inside the sandwich layer. The side circulation guiding structure includes two side guiding frames arranged inside the normalizing furnace. The inner sides of the side guiding frames are respectively movably connected with a first connecting piece and a second connecting piece. The first connecting piece is driven by a pushing component arranged on the sandwich layer. When the corner piece moves to the hole position on its outside through the transmission structure and coincides with the first connecting piece, the pushing component pushes out the first connecting piece and the second connecting piece and makes the first connecting piece dock with the second connecting piece, so that the hot air in the sandwich layer flows into the inside of the corner piece through the first connecting piece and the second connecting piece for heating.

[0012] As a further improvement, it further includes a top uniform structure. The top uniform structure includes a top guiding frame fixed to the top inside the normalizing furnace. A third connecting piece is movably arranged inside the top guiding frame. The third connecting piece is driven by a top pushing piece.

[0013] As a further improvement, the top guiding frame has the same structure as the two side guiding frames. The side guiding frame includes an inner guiding cylinder penetrating through the furnace lining and communicating with the sandwich layer. The inner guiding cylinder is connected to an inner guiding plate. The inner guiding plate is provided with a through hole for the first connecting piece and the second connecting piece to pass through.

[0014] As a further improvement, a guiding ring is arranged inside the inner guiding cylinder. The guiding ring is connected to the inside of the inner guiding cylinder through a plurality of rib strips.

[0015] As a further improvement, the first connecting piece includes a first long cylinder connected to the pushing component on the left side. Both ends of the first long cylinder are closed. A plurality of left-side through holes are opened on the outer peripheral surface of the first long cylinder. The first long cylinder is slidably arranged in the inner guiding cylinder on the left side.

[0016] As a further improvement, the second connecting piece includes a second long cylinder connected to the pushing component on the right side. Both ends of the second long cylinder are closed. A plurality of right-side through holes are opened on the outer peripheral surface of the second long cylinder. The second long cylinder is slidably arranged in the inner guiding cylinder on the right side.

[0017] As a further improvement, a mating buckle is arranged on the side of the first long cylinder facing the corner piece, and a mating ring is arranged on the side of the second long cylinder facing the corner piece. After the first long cylinder and the second long cylinder extend into the corner piece, the mating buckle of the first long cylinder cooperates with the mating ring of the second long cylinder.

[0018] As a further improvement, automatic control feeding door panels and discharging door panels are provided on both the normalizing furnace and the waste heat recovery furnace.

[0019] The beneficial effects of the present invention are as follows:

[0020] In a conventional annealing furnace, the angle members are annealed by heating air with a thermal radiation tube, so as to achieve a uniform annealing effect on the outer surface of the angle members. However, in fact, although there are holes on the surface of the angle members, there are some concave arcs on the inner side, and due to the relatively thick thickness of the angle members, heat radiation is difficult to enter the interior of the angle members. Therefore, through the side circulation guiding structure provided in the present invention, when the angle members move to the position corresponding to the side circulation guiding structure under the action of the material tray, the pushing component will push out the first connecting member and the second connecting member, so that the first connecting member and the second connecting member move along the side guiding frame and extend to the interior position of the angle members. The first connecting member and the second connecting member extending out of the side guiding frame will conduct the heated air in the sandwich layer to the interior of the angle members, so as to realize the heating of the interior of the angle members. Thus, during the process of the angle members passing through this area of the side circulation guiding structure, a uniform annealing effect of the interior and local parts of a single area can be achieved, and the output channel of the hot steam can be immediately closed after the angle members pass through, reducing energy consumption. Therefore, the effects of surface and partial inner layer heat radiation heating and inner layer contour hot steam heating can be achieved. And because the air guiding strokes of the first connecting member and the second connecting member are relatively long, in order to ensure the stability during heat conduction, the first connecting member and the second connecting member will also be butted together after extending into the angle members, so as to form a stable internal heating structure and ensure the annealing effect inside.

[0021] In fact, there are also holes on the top of the angle members, and there is also a certain distance between the side circulation guiding structure in the middle and the top surface of the angle members. Therefore, on the basis of the side circulation guiding structure, the present invention adds a top uniform structure. The structure of the top uniform structure is similar to that of the side circulation guiding structure, but the set angles are different, so as to form three-way heating in the upper, left and right directions, and form a uniform effect on the interior of the angle members, improving the practical effect of the present invention.

[0022] During the process of the first connecting member, the second connecting member and the third connecting member extending out, since they need to accurately reach the holes in the angle members and the time they stay inside the angle members is limited, the initial positions of the above three are all on the side of the angle member transmission position. And because the length of the connecting members is relatively long, if there is no support all the time, it will have a greater impact on the pushing component. Therefore, the side guiding frame of the present invention is provided with an inner guiding cylinder and an inner guiding plate, which can first provide certain support for the connecting members, and then guide the extension and retraction of the connecting members, so as to provide a basis for the stable movement of the connecting members.

[0023] The inner guide cylinder not only limits and guides the connecting piece, but also has the effect of storing gas. The hot steam output from the interlayer will be output to the inner guide cylinder. However, the diameter of the inner guide cylinder is relatively large. If the connecting piece is guided only by its inner diameter, it is difficult to fit closely to the connecting piece. Therefore, the present invention arranges a guide ring on the inner side of the inner guide cylinder and connects it through ribs arranged at intervals, so that the gas can pass through while guiding the connecting piece, avoiding the use of a closed ring body for guidance and thus causing gas blockage.

[0024] The first connecting piece and the second connecting piece will not hinder the normal movement of the corner piece in the initial position, but the gas in the interlayer needs to be immediately discharged after being extended. Therefore, the two ends of the connecting piece of the present invention are closed, and only the left through hole and the right through hole are opened on the outer peripheral surface, so that there will be no air leakage when the inner guide cylinder and the inner guide plate are sealed, and the air can be quickly guided after being extended, and the reaction speed is extremely fast, so that the maximum utilization of heat is achieved in the limited passing time.

[0025] As mentioned above, the first connecting member and the second connecting member are relatively long, so they need to be docked to form a stable structure. Therefore, the present invention provides a mating buckle and a mating ring at the position of the first connecting member and the second connecting member, so that they can cooperate with each other after being extended into place to realize a long structure and construct a stable straight rod structure. Even if the pressure of the incoming gas is too high, it will not tilt or bend. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0028] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0029] Figure 3 The present invention Figure 2 Cross-section view at AA in the middle.

[0030] Figure 4 The present invention Figure 2 Cross-section view at the middle BB.

[0031] Figure 5 The present invention Figure 4 Magnified view of area C.

[0032] Figure 6 It is a schematic structural diagram of the side circulation guiding structure of the present invention.

[0033] Figure 7 It is a schematic structural diagram of the first long cylinder of the present invention.

[0034] In the figure:

[0035] Normalizing furnace 10, furnace lining 11, heating element 12, interlayer 13, blower 14, waste heat recovery furnace 20, heat conduction pipe 21, transmission structure 30, guide rail 31, material tray 32, side circulation guiding structure 40, side guide frame 41, inner guide cylinder 411, inner guide plate 412, guide ring 413, rib 414, first connecting piece 42, first long cylinder 421, left through hole 422, second connecting piece 43, second long cylinder 431, right through hole 432, push component 44, mating buckle 451, mating ring 452, top uniform structure 50, top guide frame 51, third connecting piece 52, top pushing piece 53. Specific embodiments

[0036] To make the embodiments of the present invention, they all belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0037] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0038] Refer to Figures 1 to 7As shown in the figure, a corner fitting annealing device for containers includes: a normalizing furnace 10 for annealing. A furnace lining 11 is provided inside the normalizing furnace 10, and a number of heating elements 12 are arranged in the furnace lining 11. The front and rear ends of the normalizing furnace 10 are opened and closed through furnace doors; a waste heat recovery furnace 20 is arranged at the front end of the normalizing furnace 10, and the side of the waste heat recovery furnace 20 is connected to the normalizing furnace 10 through a heat conduction pipe 21; a transmission structure 30, including guide rails 31 arranged inside the normalizing furnace 10 and the waste heat recovery furnace 20, and a material tray 32 for loading corner fittings is slidably installed on the guide rails 31; a side circulation guiding structure 40. A sandwich layer 13 is arranged outside the normalizing furnace 10, and the sandwich layer 13 is connected to the outside through a blower 14. The front half of the heating element 12 is located inside the normalizing furnace 10, and the rear half of the heating element 12 is located inside the sandwich layer 13. The side circulation guiding structure 40 includes two side guiding frames 41 arranged inside the normalizing furnace 10. A first connecting piece 42 and a second connecting piece 43 are respectively movably connected to the inner sides of the side guiding frames 41. The first connecting piece 42 is driven by a pushing component 44 arranged on the sandwich layer 13. When the hole position outside the corner fitting moves to coincide with the first connecting piece 42 through the transmission structure 30, the pushing component 44 pushes out the first connecting piece 42 and the second connecting piece 43 and makes the first connecting piece 42 and the second connecting piece 43 dock, so that the hot air in the sandwich layer 13 flows into the inner side of the corner fitting through the first connecting piece 42 and the second connecting piece 43 for heating.

[0039] In this embodiment, the two side guiding frames 41 are symmetrically arranged, and both the structure and the effect are the same.

[0040] In a conventional annealing furnace, the annealing of corner fittings is mostly carried out by heating air with heat radiation tubes, so as to achieve a uniform annealing effect on the outer surface of the corner fittings. However, in fact, although there are holes on the surface of the corner fittings, there are some concave arcs on the inner side, and due to the relatively thick thickness of the corner fittings, heat radiation is difficult to enter the interior of the corner fittings. Therefore, in the present invention, through the provided side circulation guiding structure 40, when the corner fitting moves to the position corresponding to the side circulation guiding structure 40 under the action of the tray 32, the pushing component 44 will push out the first connecting piece 42 and the second connecting piece 43, so that the first connecting piece 42 and the second connecting piece 43 move along the side guiding frame 41 and extend to the interior position of the corner fitting. The first connecting piece 42 and the second connecting piece 43 extending out of the side guiding frame 41 will conduct the heated air in the sandwich layer 13 to the interior of the corner fitting, thereby realizing the heating of the interior of the corner fitting. Thus, during the process of the corner fitting passing through this area of the side circulation guiding structure 40, a uniform annealing effect on the interior and local parts of a single area can be achieved, and the output channel of the hot steam can be immediately closed after the corner fitting passes through, reducing energy consumption. Therefore, the effects of surface and partial inner layer heat radiation heating and inner layer contour hot steam heating can be achieved. And because the air guiding stroke of the first connecting piece 42 and the second connecting piece 43 is relatively long, in order to ensure the stability during heat conduction, the first connecting piece 42 and the second connecting piece 43 will also be butted together after extending into the corner fitting, thereby forming a stable internal heating structure to ensure the annealing effect inside.

[0041] In fact, there are also holes on the top of the corner fitting, and there is also a certain distance between the side circulation guiding structure 40 in the middle and the top surface of the corner fitting. Therefore, this embodiment further includes a top uniform structure 50. The top uniform structure 50 includes a top guiding frame 51 fixed to the top inside the normalizing furnace 10. A third connecting piece 52 is movably arranged inside the top guiding frame 51. The third connecting piece 52 is driven by a top pushing piece 53. By adding the top uniform structure 50 on the basis of the side circulation guiding structure 40, the structure of the top uniform structure 50 is similar to that of the side circulation guiding structure 40, but the set angle is different, so that three-way heating in the up, left, and right directions can be formed, and a uniform effect can be formed inside the corner fitting, improving the practical effect of the present invention.

[0042] During the extension process of the first connecting piece 42, the second connecting piece 43, and the third connecting piece 52, since they need to accurately reach the holes in the corner piece and the time they stay inside the corner piece is limited, the initial positions of the above three are all on the edge of the corner piece transmission position. And because the connecting piece is relatively long, if there is no support all the time, it will have a greater impact on the pushing component 44. Therefore, the structure of the top guide frame 51 and the two side guide frames 41 in this embodiment is the same. The side guide frame 41 includes an inner guide cylinder 411 that penetrates the furnace lining 11 and communicates with the interlayer 13. The inner guide cylinder 411 is connected to an inner guide plate 412. The inner guide plate 412 is provided with a through hole for the first connecting piece 42 and the second connecting piece 43 to pass through. The inner guide cylinder 411 and the inner guide plate 412 are provided in the side guide frame 41. First, it can provide a certain support for the connecting piece, and then guide the extension and retraction of the connecting piece, thereby providing a basis for the stable movement of the connecting piece.

[0043] While the inner guide cylinder 411 limits and guides the connecting piece, it also has the effect of storing gas. The hot steam output from the interlayer 13 will be output into the inner guide cylinder 411. However, the diameter of the inner guide cylinder 411 is relatively large. If only relying on its inner diameter to guide the connecting piece, it is difficult to closely adhere to the connecting piece. Therefore, a guide ring 413 is provided inside the inner guide cylinder 411 in this embodiment. The guide ring 413 is connected to the inside of the inner guide cylinder 411 through a plurality of rib strips 414. By providing the guide ring 413 on the inner side of the inner guide cylinder 411 and connecting it through the spaced rib strips 414, it can allow the gas to pass through while guiding the connecting piece, avoiding using a closed ring body for guiding and thus causing gas blockage.

[0044] The first connecting piece 42 and the second connecting piece 43 will not obstruct the normal movement of the corner piece in the initial position, and after extension, they need to immediately discharge the gas in the interlayer 13. Therefore, the connecting pieces on both sides in this embodiment specifically include: the first connecting piece 42 includes a first long cylinder 421 connected to the left pushing component 44. The two ends of the first long cylinder 421 are closed. A plurality of left through holes 422 are provided on the outer peripheral surface of the first long cylinder 421. The first long cylinder 421 is slidably arranged in the left inner guide cylinder 411. The second connecting piece 43 includes a second long cylinder 431 connected to the right pushing component 44. The two ends of the second long cylinder 431 are closed. A plurality of right through holes 432 are provided on the outer peripheral surface of the second long cylinder 431. The second long cylinder 431 is slidably arranged in the right inner guide cylinder 411. The two ends of the connecting piece are closed, and only the left through holes 422 and the right through holes 432 are provided on the outer peripheral surface, so that it can be airtight when closing the inner guide cylinder 411 and the inner guide plate 412, and can quickly conduct gas after extension, with extremely fast reaction speed, achieving the maximum utilization of heat in the limited passing time.

[0045] As for the third connecting member 52, its structure is the same as the first connecting member 42 and the second connecting member 43 mentioned above, but the installation angle is different, and there is only one of them.

[0046] As mentioned above, the first connecting piece 42 and the second connecting piece 43 are relatively long, so they need to be connected to form a stable structure. Therefore, in this embodiment, a matching buckle 451 is provided on the side of the first elongated tube 421 facing the corner piece, and a matching ring 452 is provided on the side of the second elongated tube 431 facing the corner piece. When the first elongated tube 421 and the second elongated tube 431 are extended into the interior of the corner piece, the matching buckle 451 of the first elongated tube 421 cooperates with the matching ring 452 of the second elongated tube 431. By providing the matching buckle 451 and the matching ring 452 at the positions of the first connecting piece 42 and the second connecting piece 43, they can cooperate with each other after being extended into place to realize a long structure, constructing a stable straight rod structure, and will not tilt or bend even if the pressure of the incoming gas is too large.

[0047] In order to retain the heat of the normalizing furnace 10 and the waste heat recovery furnace 20, the normalizing furnace 10 and the waste heat recovery furnace 20 are provided with automatically controlled feeding door panels and discharging door panels, which are opened during feeding and discharging and closed at other times to retain heat as much as possible.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A container corner fitting annealing equipment, characterized in that: include: A normalizing furnace (10) for annealing, wherein a furnace lining (11) is arranged on the inner side of the normalizing furnace (10), a plurality of heating elements (12) are arranged in the furnace lining (11), and the front and rear ends of the normalizing furnace (10) are opened and closed by furnace doors; A waste heat recovery furnace (20) is arranged at the front end of the normalizing furnace (10), wherein the side of the waste heat recovery furnace (20) is connected to the normalizing furnace (10) via a heat conducting pipe (21); The transmission structure (30) comprises a guide rail (31) arranged inside the normalizing furnace (10) and the waste heat recovery furnace (20), wherein a material tray (32) for loading corner pieces is slidably mounted on the guide rail (31); A side circulation guide structure (40), wherein an outer side of the normalizing furnace (10) is provided with an interlayer (13), the interlayer (13) is connected to the outside via a blower (14), the front half of the heating element (12) is located in the normalizing furnace (10), and the rear half of the heating element (12) is located in the interlayer (13), and the side circulation guide structure (40) comprises two side guide frames (41) arranged in the normalizing furnace (10), and the inner sides of the side guide frames (41) are respectively movably connected with a first connector (42) and a second connector (43). A connecting piece (43), wherein the first connecting piece (42) is driven by a recursive assembly (44) disposed on the interlayer (13); when the corner piece is moved through the transmission structure (30) to a hole position outside the corner piece and overlaps with the first connecting piece (42), the recursive assembly (44) pushes out the first connecting piece (42) and the second connecting piece (43) and connects the first connecting piece (42) and the second connecting piece (43), so that hot air in the interlayer (13) flows into the inner side of the corner piece through the first connecting piece (42) and the second connecting piece (43) to be heated; It also includes a top uniform structure (50), the top uniform structure (50) includes a top guide frame (51) fixed to the top of the normalizing furnace (10), a third connecting member (52) is movably arranged in the top guide frame (51), and the third connecting member (52) is driven by a top pushing member (53); The top guide frame (51) has the same structure as the two side guide frames (41), and the side guide frames (41) include an inner guide cylinder (411) that penetrates the furnace lining (11) and communicates with the interlayer (13), and the inner guide cylinder (411) is connected to an inner guide plate (412), and the inner guide plate (412) is provided with a through hole for the first connecting piece (42) and the second connecting piece (43) to pass through; A guide ring (413) is provided inside the inner guide cylinder (411), and the guide ring (413) is connected to the inside of the inner guide cylinder (411) via a plurality of ribs (414).

2. The container corner fitting annealing equipment according to claim 1, characterized in that: The first connecting member (42) comprises a first elongated tube (421) connected to the recursive assembly (44) on the left side. Both ends of the first elongated tube (421) are closed. A plurality of left through holes (422) are provided on the outer circumference of the first elongated tube (421). The first elongated tube (421) is slidably disposed in the inner guide tube (411) on the left side.

3. The container corner fitting annealing equipment according to claim 2, characterized in that: The second connecting member (43) comprises a second elongated tube (431) connected to the right recursive assembly (44), the two ends of the second elongated tube (431) are closed, a plurality of right through holes (432) are provided on the outer circumference of the second elongated tube (431), and the second elongated tube (431) is slidably disposed in the right inner guide tube (411).

4. The container corner fitting annealing equipment according to claim 3, characterized in that: A matching buckle (451) is provided on the side of the first elongated tube (421) facing the corner piece, and a matching ring (452) is provided on the side of the second elongated tube (431) facing the corner piece. When the first elongated tube (421) and the second elongated tube (431) extend into the interior of the corner piece, the matching buckle (451) of the first elongated tube (421) matches with the matching ring (452) of the second elongated tube (431).

5. The container corner fitting annealing equipment according to claim 1, characterized in that: The normalizing furnace (10) and the waste heat recovery furnace (20) are both provided with automatically controlled feeding door panels and discharging door panels.

Images