Container corner fitting annealing equipment

Abstract

The invention discloses annealing equipment for container corner fittings. The annealing equipment comprises a normalizing furnace, a furnace lining, a heating element, a waste heat recovery furnace, a conveying structure, a guide rail and a charging tray, an interlayer is arranged on the outer side of the normalizing furnace and connected with the outside through an air blower, the front half portion of the heating element is located in the normalizing furnace, the rear half portion of the heating element is located in the interlayer, and the side circulation guide structure comprises two side guide frames arranged in the normalizing furnace. The inner sides of the side guide frames are movably connected with a first connecting piece and a second connecting piece correspondingly, the connecting pieces are driven by a recursion assembly arranged on the interlayer, annealing of the inner area and the outer area of the corner fitting can be uniform, and the cracking phenomenon caused by uneven temperature is avoided.

Description

Technical Field

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

[0002] The corner fittings of containers are also called box corners and hanging corners. They are mainly used at the corners of containers. They are mainly cast by sand casting. After casting, the temperature of the corner fittings of the container is over a thousand degrees. If they are cooled suddenly, it is easy to cause cracks in the corner fittings and the whole becomes brittle. Too fast cooling is not conducive to the stability of the corner fittings. Therefore, the existing casting process often performs annealing after sand casting.

[0003] In the traditional technology, during annealing, the corner pieces are usually placed on a tray, which is then slid into an annealing furnace. The annealing furnace uses steam for circulating annealing. Although this annealing method can achieve a cooling effect, it consumes a lot of energy. Therefore, some existing technologies use electric heating tubes or electric heating glass to perform annealing by thermal radiation, thereby improving energy utilization. Thermal radiation is more energy-efficient than traditional wind heating. However, since the corner pieces have openings, the inner wall of the openings has a certain concave profile and amplitude. Although thermal radiation has a certain degree of penetration, it is difficult to penetrate thicker corner pieces, resulting in uneven temperatures inside the corner pieces and outside during annealing, and cracks are prone to appear inside. It is relatively unstable when put into use, which can easily affect the quality of container use.

[0004] Therefore, this case aims to provide a container corner fitting annealing equipment, which can not only heat the corner fittings by thermal radiation, but also accurately heat and anneal the internal area of ​​the corner fittings, so that the annealing of the inner and outer areas of the corner fittings is uniform, avoiding cracking caused by uneven temperature. Summary of the invention

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

[0006] The present invention is achieved in that: A container corner piece annealing device, comprising: A normalizing furnace for annealing, wherein a furnace lining is arranged inside the normalizing furnace, a plurality of heating elements are arranged in the furnace lining, and the front and rear ends of the normalizing furnace are opened and closed by furnace doors; A waste heat recovery furnace is 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; The transmission structure comprises a guide rail arranged inside the normalizing furnace and the waste heat recovery furnace, and a material tray for loading corner pieces is slidably mounted on the guide rail; A side circulation guide structure, wherein an interlayer is arranged on the outer side of the normalizing furnace, and the interlayer is connected to the outside through a blower. The front half of the heating element is located in the normalizing furnace, and the rear half of the heating element is located in the interlayer. The side circulation guide structure comprises two side guide frames arranged in the normalizing furnace, and the inner sides of the side guide frames are movably connected with a first connector and a second connector respectively, and the first connector is driven by a recursive assembly arranged on the interlayer. When the corner piece is moved through the transmission structure to the hole position on its outer side to coincide with the first connector, the recursive assembly pushes the first connector and the second connector out and docks the first connector with the second connector, so that the hot air in the interlayer flows into the inner side of the corner piece through the first connector and the second connector for heating.

[0007] As a further improvement, it also includes a top uniform structure, which includes a top guide frame fixed to the top of the normalizing furnace, a third connecting member is movably arranged in the top guide frame, and the third connecting member is driven by a top pushing member.

[0008] As a further improvement, the top guide frame has the same structure as the two side guide frames, and the side guide frame includes an inner guide cylinder that penetrates the furnace lining and communicates with the interlayer, and the inner guide cylinder is connected to an inner guide plate, and the inner guide plate has a through hole for the first connecting member and the second connecting member to pass through.

[0009] As a further improvement, a guide ring is arranged inside the inner guide cylinder, and the guide ring is connected to the inside of the inner guide cylinder through a plurality of ribs.

[0010] As a further improvement, the first connecting member includes a first elongated tube connected to the left recursive assembly, both ends of the first elongated tube are closed, a plurality of left through holes are opened on the outer circumference of the first elongated tube, and the first elongated tube is slidably set in the inner guide tube on the left.

[0011] As a further improvement, the second connecting member includes a second elongated tube connected to the right-side recursive assembly, both ends of the second elongated tube are closed, a plurality of right-side through holes are opened on the outer circumference of the second elongated tube, and the second elongated tube is slidably set in the right-side inner guide tube.

[0012] As a further improvement, a mating buckle is provided on the side of the first elongated tube facing the corner piece, and a mating ring is provided on the side of the second elongated tube facing the corner piece. When the first elongated tube and the second elongated tube extend into the interior of the corner piece, the mating buckle of the first elongated tube mates with the mating ring of the second elongated tube.

[0013] As a further improvement, the normalizing furnace and the waste heat recovery furnace are both provided with automatically controlled feeding door panels and discharging door panels.

[0014] The beneficial effects of the present invention are: In conventional annealing furnaces, the corner pieces are mostly annealed by heating the air with a heat radiation tube, so that a uniform annealing effect can be achieved on the outer surface of the corner piece. However, in fact, although holes are provided on the surface of the corner piece, there is a partially concave curvature on the inner side, and since the thickness of the corner piece is relatively thick, it is difficult for heat radiation to enter the interior of the corner piece. Therefore, the present invention provides a side circulation guide structure. When the corner piece moves to the position corresponding to the side circulation guide structure under the action of the material tray, the recursive assembly pushes out the first connector and the second connector, so that the first connector and the second connector move along the side guide frame and extend to the inner position of the corner piece, and the first connector and the second connector extending out of the side guide frame are pushed out. The connecting piece will conduct the heated air in the interlayer to the interior of the corner piece, thereby achieving heating inside the corner piece. In the process of the corner piece passing through the side circulation guide structure, the internal and local uniform annealing effect of the separate area can be achieved, and the output channel of the hot steam can be closed immediately after the corner piece passes, thereby reducing energy consumption, thereby achieving the effects of thermal radiation heating of the surface and part of the inner layer and hot steam heating of the inner layer contour. Moreover, since the air guide stroke of the first connecting piece and the second connecting piece is relatively long, in order to ensure the stability during the heat steam conduction, the first connecting piece and the second connecting piece will also be butt-joined together after extending into the corner piece, thereby forming a stable internal heating structure to ensure the internal annealing effect.

[0015] There are actually holes on the top of the corner piece, and the side circulation guide structure in the middle is also a certain distance away from the top surface of the corner piece. Therefore, the present invention adds a top uniform structure on the basis of the side circulation guide structure. The top uniform structure is similar to the side circulation guide structure, but the angles at which they are set are different, thereby being able to form three-way heating of the top, left, and right, and forming a uniform effect inside the corner piece, thereby improving the practical effect of the present invention.

[0016] During the extension of the first connecting member, the second connecting member and the third connecting member, since they need to accurately reach the hole of the corner member and their stay time inside the corner member is limited, the initial positions of the above three are all located on the edge of the corner member transmission position. Since the length of the connecting member is relatively long, if there is no support setting, it will have a greater impact on the recursive assembly. Therefore, the side guide frame of the present invention is provided with an inner guide cylinder and an inner guide plate, which can firstly provide a certain support for the connecting member, and then guide the extension and retraction of the connecting member, thereby providing a basis for the stable movement of the connecting member.

[0017] 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.

[0018] 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.

[0019] 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

[0020] 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.

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0023] Figure 3 The present invention Figure 2 Cross-section view at AA in the middle.

[0024] Figure 4 The present invention Figure 2 Cross-section view at the middle BB.

[0025] Figure 5 The present invention Figure 4 Magnified view of area C.

[0026] Figure 6 It is a structural schematic diagram of the side circulation guide structure of the present invention.

[0027] Figure 7 It is a schematic structural diagram of the first elongated tube of the present invention.

[0028] In the figure: Normalizing furnace 10, furnace lining 11, heating element 12, interlayer 13, blower 14, waste heat recovery furnace 20, heat pipe 21, transmission structure 30, guide rail 31, material tray 32, side circulation guide structure 40, side guide frame 41, inner guide cylinder 411, inner guide plate 412, guide ring 413, rib 414, first connecting piece 42, first elongated cylinder 421, left through hole 422, second connecting piece 43, second elongated cylinder 431, right through hole 432, recursive assembly 44, mating buckle 451, mating ring 452, top uniform structure 50, top guide frame 51, third connecting piece 52, top pushing piece 53. DETAILED DESCRIPTION

[0029] In order to make the embodiments of the present invention, 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 accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0030] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as referring to the purpose, technical solutions and advantages of the methods. To be more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work indicate or imply relative importance or implicitly indicate the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] Reference Figure 1 to Figure 7As shown, a container corner piece annealing equipment comprises: a normalizing furnace 10 for annealing, 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, 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, comprising a guide rail 31 arranged on the inner side of the normalizing furnace 10 and the waste heat recovery furnace 20, and a material tray 32 for loading corner pieces is slidably mounted on the guide rail 31; a side circulation guide structure 40, an interlayer 13 is arranged on the outer side of the normalizing furnace 10, and the interlayer 13 is connected to the outside through a blower 14, and the ... 2 is located in the normalizing furnace 10, and the rear half of the heating element 12 is located in the interlayer 13. The side circulation guide structure 40 includes two side guide frames 41 arranged in the normalizing furnace 10. The inner sides of the side guide frames 41 are respectively movably connected with a first connector 42 and a second connector 43. The first connector 42 is driven by a recursive assembly 44 arranged on the interlayer 13. When the corner piece moves to the hole position on its outer side through the transmission structure 30 and overlaps with the first connector 42, the recursive assembly 44 pushes the first connector 42 and the second connector 43 out and docks the first connector 42 with the second connector 43, so that the hot air in the interlayer 13 flows into the inner side of the corner piece through the first connector 42 and the second connector 43 for heating.

[0032] In this embodiment, the two side guide frames 41 are symmetrically arranged, and are identical in structure and effect.

[0033] In conventional annealing furnaces, the corner pieces are mostly annealed by heating the air with a heat radiation tube, so that a uniform annealing effect can be achieved on the outer surface of the corner piece. However, in fact, although holes are provided on the surface of the corner piece, there is a partially concave curvature on the inner side, and since the thickness of the corner piece is relatively thick, it is difficult for heat radiation to enter the interior of the corner piece. Therefore, the present invention provides a side circulation guide structure 40. When the corner piece moves to the position corresponding to the side circulation guide structure 40 under the action of the material tray 32, the recursive assembly 44 pushes 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 guide frame 41 and extend to the inner position of the corner piece, and the first connecting piece 42 and the second connecting piece 43 extending out of the side guide frame 41 are pushed out. 2 and the second connecting piece 43 will conduct the heated air in the interlayer 13 to the interior of the corner piece, thereby realizing heating of the interior of the corner piece, so that in the process of the corner piece passing through the area of ​​the side circulation guide structure 40, the internal and local uniform annealing effect of the separate area can be achieved, and the output channel of the hot steam can be closed immediately after the corner piece passes through, thereby reducing energy consumption, thereby realizing the effects of thermal radiation heating of the surface and part of the inner layer and hot steam heating of the inner layer contour, and because the air guide stroke of the first connecting piece 42 and the second connecting piece 43 is relatively long, in order to ensure the stability during the heat steam conduction, the first connecting piece 42 and the second connecting piece 43 will also be butted together after extending into the corner piece, thereby forming a stable internal heating structure to ensure the internal annealing effect.

[0034] There are actually holes on the top of the corner piece, and the side circulation guide structure 40 in the middle is also at a certain distance from the top surface of the corner piece. Therefore, the present embodiment also includes a top uniform structure 50, and the top uniform structure 50 includes a top guide frame 51 fixed to the top of the normalizing furnace 10, and 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. By adding the top uniform structure 50 on the basis of the side circulation guide structure 40, the structure of the top uniform structure 50 is similar to that of the side circulation guide structure 40, but the angles at which they are set are different, so that three-way heating of the top, left and right can be formed, and a uniform effect can be formed inside the corner piece, thereby improving the practical effect of the present invention.

[0035] During the extension of the first connecting member 42, the second connecting member 43 and the third connecting member 52, since they need to accurately reach the hole of the corner member and their stay time inside the corner member is limited, the initial positions of the above three are all located on the edge of the corner member transmission position. Since the length of the connecting member is relatively long, if there is no support setting, it will have a greater impact on the recursive assembly 44. Therefore, the top guide frame 51 of this embodiment has the same structure as the two side guide frames 41. 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 has a through hole for the first connecting member 42 and the second connecting member 43 to pass through. The side guide frame 41 is provided with an inner guide cylinder 411 and an inner guide plate 412, which can first provide a certain support for the connecting member, and then guide the extension and retraction of the connecting member, thereby providing a basis for the stable movement of the connecting member.

[0036] The inner guide cylinder 411 not only limits and guides the connector, but also has the effect of storing gas. The hot steam output from the interlayer 13 will be output to the inner guide cylinder 411. However, the diameter of the inner guide cylinder 411 is relatively large. If the connector is guided only by its inner diameter, it is difficult to fit tightly against the connector. Therefore, a guide ring 413 is provided inside the inner guide cylinder 411 of this embodiment. The guide ring 413 is connected to the inside of the inner guide cylinder 411 through a number of ribs 414. By providing a guide ring 413 on the inner side of the inner guide cylinder 411 and connecting it through ribs 414 arranged at intervals, the gas can pass through while guiding the connector, thereby avoiding the use of a closed ring body for guidance and causing gas blockage.

[0037] The first connecting piece 42 and the second connecting piece 43 will not hinder the normal movement of the corner piece in the initial position, but after being extended, the gas in the interlayer 13 needs to be immediately discharged. Therefore, the connecting pieces on both sides of this embodiment specifically include: the first connecting piece 42 includes a first elongated tube 421 connected to the left recursive component 44, the two ends of the first elongated tube 421 are closed, and a plurality of left through holes 422 are opened on the outer peripheral surface of the first elongated tube 421. The first elongated tube 421 is slidably set in the inner guide tube 411 on the left, and the second connecting piece 43 includes a first elongated tube 421 connected to the right recursive component 44. The second elongated cylinder 431 is connected to the recursive assembly 44 on the side, and both ends of the second elongated cylinder 431 are closed. A plurality of right through holes 432 are provided on the outer circumference of the second elongated cylinder 431. The second elongated cylinder 431 is slidably set in the inner guide cylinder 411 on the right side. 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 circumference, so that there is no air leakage when the inner guide cylinder 411 and the inner guide plate 412 are sealed, and 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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). The first connecting piece (43) is driven by a recursive assembly (44) arranged on the interlayer (13); when the corner piece is moved to the hole position outside the corner piece through the transmission structure (30) 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 docks the first connecting piece (42) with 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.

2. The container corner fitting annealing equipment according to claim 1, characterized in that: It also includes a top uniform structure (50), wherein 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).

3. The container corner fitting annealing equipment according to claim 2, characterized in that: The top guide frame (51) has the same structure as the two side guide frames (41). The side guide frames (41) include an inner guide tube (411) that penetrates the furnace lining (11) and communicates with the interlayer (13). The inner guide tube (411) is connected to an inner guide plate (412). The inner guide plate (412) has a through hole for the first connecting piece (42) and the second connecting piece (43) to pass through.

4. The container corner fitting annealing equipment according to claim 3, characterized in that: 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).

5. 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.

6. The container corner fitting annealing equipment according to claim 5, 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).

7. The container corner fitting annealing equipment according to claim 6, 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).

8. 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.

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