Box pit furnace heat treatment hanger

Abstract

The utility model discloses a heat treatment hanger for a box pit furnace, which belongs to the technical field of metal heat treatment and comprises a supporting rod, a bearing rod, a bearing frame and a fixing plate assembly. The fixing plate assembly is installed at a through hole of a box type workpiece, and the through hole is divided into two fan-shaped through holes. The bottom of the fixing plate assembly is fixedly connected with a fixing ring. The bearing frame is of a U-shaped structure; a bearing ring is processed on the middle part of the U-shaped structure along the thickness direction of the U-shaped structure; a mounting ring is processed on each of two side plates of the U-shaped structure; the two side plates of the U-shaped structure are respectively inserted into the two fan-shaped through holes; the bearing rod is sequentially inserted and mounted in the mounting ring, the fixing ring and the other mounting ring; the supporting rod penetrates through and is installed in the bearing ring. According to the utility model, the problems of low efficiency caused by tedious operation in the process of hoisting large box type workpieces into a furnace and hanging heat treatment in the furnace and potential safety hazards caused by failure of a welding area can be solved, so that the rapid, convenient and safe production of the box type workpieces is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal heat treatment, and in particular relates to a box-type well furnace heat treatment hanger. Background Art

[0002] When heat treatment is performed on box-type workpieces through a pit furnace, the box-type workpieces need to be placed vertically in the pit furnace. In order to place the box-type workpieces vertically (hanging in the pit furnace, and the box-type workpieces do not touch the inner bottom surface of the pit furnace), the workpieces are generally directly welded with lifting rings, support rods and other tooling, and the tooling is hooked by the safety hook of the crane to place the workpiece vertically in the pit furnace. Since the temperature inside the pit furnace can reach 650-950℃ during heat treatment, the method of directly welding tooling on the workpiece has the following shortcomings:

[0003] (1) When the tooling is directly welded on the workpiece, the weld and weld-affected zone on the workpiece will change the performance of the workpiece itself.

[0004] (2) Since the strength of the weld cannot be guaranteed when the tooling is welded to the workpiece, there are risks of weld falling off and other safety hazards in high-temperature working conditions.

[0005] (3) After the heat treatment is completed, the tooling needs to be removed by cutting with a flame gun.

[0006] Therefore, in order to place the box-type workpiece vertically in the pit furnace, a box-type pit furnace heat treatment hanger is needed that is not prone to failure at high temperatures (it can also ensure the stable suspension of the workpiece under high temperature conditions), has a simple structure, stable operation, and is safe and reliable. Utility Model Content

[0007] In view of this, the utility model provides a box-type pit furnace heat treatment hanger, which solves the problem of low efficiency caused by cumbersome operation during the process of hoisting large box-type workpieces into the furnace and hanging them in the furnace for heat treatment, and solves the safety hazard problem caused by failure of the welding area, thereby ensuring the fast, convenient and safe production of box-type workpieces.

[0008] The utility model is realized by the following technical solutions:

[0009] A box-type pit furnace heat treatment hanger, used for lifting and hanging box-type workpieces;

[0010] A through hole a is processed on one end face of a box-like workpiece, and the end face is referred to as face a;

[0011] The hanger includes: a supporting rod, a load-bearing rod, a load-bearing frame and a fixing plate assembly;

[0012] The fixing plate assembly is installed at the through hole a of the box-like workpiece, and the through hole a is divided into two fan-shaped through holes; a fixing ring is fixedly connected to the bottom of the fixing plate assembly;

[0013] The load-bearing frame is a U-shaped structure, with the open end of the U-shaped structure facing downward; a through hole is processed on the middle part of the U-shaped structure along its thickness direction, and the through hole is used as a load-bearing ring; a mounting ring is processed on each of the two side plates of the U-shaped structure, and the two mounting rings are equal in size and coaxial; the two side plates of the U-shaped structure are respectively inserted into two fan-shaped through holes, and the two mounting rings are coaxial with the fixing ring;

[0014] The load-bearing rods are inserted into and installed in the mounting ring, the fixing ring and another mounting ring in sequence; the supporting rods pass through and are installed in the load-bearing rings, and the box-type workpieces are suspended in the shaft furnace through the supporting rods. When suspended, the weight of the box-type workpieces is applied to the supporting rods and the load-bearing rods at the same time.

[0015] Furthermore, the hanger also includes two positioning rings;

[0016] The inner diameters of the two positioning rings are both larger than the outer diameter of the support rod; each positioning ring is processed with more than three threaded holes in the radial direction, and the three threaded holes are evenly distributed along the circumference of the positioning ring;

[0017] The two positioning rings are respectively inserted and fixed from the two ends of the supporting rod, and the two positioning rings are respectively located on the two sides of the load-bearing ring;

[0018] Each threaded hole on the positioning ring is provided with a bolt, and the bolt is screwed into the threaded hole to achieve axial limiting and fixing of the supporting rod.

[0019] Further, the fixing plate assembly includes: an upper fixing plate and a lower fixing plate;

[0020] The upper fixing plate and the lower fixing plate are both rectangular plates, and two through holes perpendicular to the end faces of the rectangular plates are processed on the rectangular plates, and the two through holes are symmetrically located at the two ends of the rectangular plates;

[0021] The upper fixing plate and the lower fixing plate are arranged opposite to each other in the upper and lower end surfaces at the through hole a of the surface a, respectively. The two through holes on the upper fixing plate are opposite to the two through holes on the lower fixing plate one by one. The two bolts are respectively inserted into the two through holes on the upper fixing plate, and then respectively inserted into the two through holes on the lower fixing plate, so as to realize the installation and fixation between the upper fixing plate and the lower fixing plate, and clamp the surface a of the box-like workpiece between the fixing plate and the lower fixing plate.

[0022] The fixing ring is fixedly connected to the bottom surface of the lower fixing plate.

[0023] Furthermore, the support rod and the load-bearing rod installed on the fixing ring are perpendicular.

[0024] Furthermore, a through hole is processed in the middle part of the U-shaped structure of the load-bearing frame, so that the through hole serves as a lifting ring; the lifting ring and the load-bearing ring are arranged up and down, and the lifting ring is located above the load-bearing ring; the lifting ring is used to lift the box-type workpiece, and when lifting the box-type workpiece, the weight of the box-type workpiece is applied to the load-bearing rod and the lifting ring.

[0025] Furthermore, both ends of the load-bearing rod are respectively processed with external threads;

[0026] After the load-bearing rod is inserted into the mounting ring and the fixing ring, two nuts are respectively threadedly connected to the external threads at both ends of the load-bearing rod; the two nuts are respectively pressed on the two side plates of the load-bearing frame to lock and fix the load-bearing rod.

[0027] Beneficial effects:

[0028] (1) The utility model discloses a heat treatment hanger for a box-type pit furnace, the hanger comprising: a supporting rod, a load-bearing rod, a load-bearing frame and a fixed plate assembly, the load-bearing rod and the supporting rod can bear the weight of the box-type workpiece, can realize reliable locking between the box and the hanger, and is conducive to the vertical placement of the box-type workpiece; the supporting rod is installed on the load-bearing frame, and the box-type workpiece can be suspended in the pit furnace through the supporting rod, and the box-type workpiece can be heat treated; the hanger has a simple structure and is easy to operate, and can realize the lifting and hanging of the box-type workpiece in the furnace without changing the performance of the box-type workpiece, and can realize the stable lifting of the box-type workpiece while solving the problems of desoldering of the welding part and change of workpiece performance caused by tooling welding, so that the pit furnace heat treatment of the box-type workpiece is safe, applicable and reliable; at the same time, the hanger does not need to be welded on the box-type workpiece, thereby reducing the operation process of welding and flame gun cutting, and the lifting and installation of the box-type workpiece can be realized simultaneously through the hanger, which can ensure the efficient production of the product.

[0029] (2) The utility model provides a heat treatment hanger for a box-type pit furnace, wherein two positioning rings are respectively inserted into and fixed at both ends of a support rod, and the two positioning rings are respectively located on both sides of the load-bearing ring. Bolts are screwed into the positioning rings to achieve axial limitation and fixation of the support rod, so that the load-bearing frame equipped with a fixed plate assembly and a box-type workpiece can be located at the center position of the length direction of the support rod, thereby ensuring that the gravity of the box-type workpiece and the hanger can be evenly transmitted to both ends of the support rod, so that the box-type workpiece can be stably suspended in the pit furnace.

[0030] (3) The utility model provides a box-type pit furnace heat treatment hanger, in which the box-type workpiece surface a is clamped between the upper fixing plate and the lower fixing plate, so that the hanger can be stably installed on the box-type workpiece, thereby ensuring the smooth lifting and stable suspension of the box-type workpiece.

[0031] (4) The utility model is a box-type furnace heat treatment hanger, in which the external threads at both ends of the load-bearing rod are respectively threadedly connected to two nuts, and the two nuts are respectively pressed on the two side plates of the load-bearing frame to realize the installation of the load-bearing rod, which can further ensure the stable lifting and suspension of the box-type hanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is an overall schematic diagram of the utility model;

[0033] Figure 2 It is an explosion diagram of the utility model;

[0034] Figure 3 It is a schematic diagram of the support rod of the utility model;

[0035] Figure 4 This is a schematic diagram of a positioning ring of the utility model;

[0036] Figure 5 It is a schematic diagram of the load-bearing frame of the utility model;

[0037] Figure 6 It is a schematic diagram of the upper fixing plate of the utility model;

[0038] Figure 7 It is a schematic diagram of the lower fixing plate of the utility model;

[0039] Figure 8 It is a schematic diagram of the load-bearing rod of the utility model;

[0040] Among them, 1-box-type workpiece, 2-support rod, 3-positioning ring, 4-load-bearing frame, 401-lifting ring, 402-load-bearing ring, 403-side plate, 404-mounting ring, 5-upper fixing plate, 501-mounting hole a, 502-mounting hole b, 6-lower fixing plate, 601-mounting hole c, 602-mounting hole d, 603-fixing ring, 7-bolt, 8-nut, 9-load-bearing rod, 901-external thread. DETAILED DESCRIPTION

[0041] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0042] This embodiment provides a box-type pit furnace heat treatment hanger, which is installed on a box-type workpiece and is used for lifting and hanging the box-type workpiece 1;

[0043] The box-like workpiece 1 is a rectangular parallelepiped structure, and a through hole a is processed on one end face of the rectangular parallelepiped structure, and the end face is called face a; the hanger is installed at the through hole a of the box-like workpiece 1;

[0044] like Figure 1 and Figure 2As shown, the hanger comprises: a supporting rod 2, a load-bearing rod 9, a load-bearing frame 4, a fixing plate assembly, two positioning rings 3, a plurality of bolts 7 and a plurality of nuts 8;

[0045] The fixing plate assembly comprises: an upper fixing plate 5 and a lower fixing plate 6; Figure 6 and Figure 7 As shown, the upper fixing plate 5 and the lower fixing plate 6 are both rectangular plates, and two through holes perpendicular to the end faces of the rectangular plates are processed on the rectangular plates, and the two through holes are symmetrically located at the two ends of the rectangular plates; the two through holes located on the upper fixing plate 5 are respectively a mounting hole a501 and a mounting hole b502, and the two through holes located on the lower fixing plate 6 are respectively a mounting hole c601 and a mounting hole d602; the upper fixing plate 5 and the lower fixing plate 6 are arranged opposite to each other up and down, and are respectively located on the upper and lower end faces at the through hole a of the surface a, the mounting hole a501 on the upper fixing plate 5 corresponds to the mounting hole c601 on the lower fixing plate 6, and the mounting hole b502 on the upper fixing plate 5 corresponds to the mounting hole d602 on the lower fixing plate 6; The two bolts 7 are respectively inserted into the mounting holes a501 and b502 of the upper fixing plate 5, and then respectively inserted into the mounting holes c601 and d602 of the lower fixing plate 6, so as to realize the installation and fixation between the upper fixing plate 5 and the lower fixing plate 6, and clamp the surface a of the box-type workpiece 1 between the fixing plate 5 and the lower fixing plate 6; at this time, the fixing plate assembly of the hanger is located at the through hole a of the surface a, and the through hole a is divided into two fan-shaped through holes; the two through holes are respectively through hole c and through hole d; a fixing ring 603 is fixedly connected to the bottom surface of the lower fixing plate 6; the fixing ring 603 is located in the middle of the rectangular plate of the lower fixing plate 6, and the axial direction of the fixing ring 603 is consistent with the width direction of the rectangular plate;

[0046] like Figure 5 As shown, the load-bearing frame 4 is a U-shaped structure, and the open end of the U-shaped structure faces downward; two through holes are processed along the thickness direction of the middle part of the U-shaped structure, and the two through holes are arranged in the vertical direction, so that the two through holes are respectively a lifting ring 401 and a load-bearing ring 402 from top to bottom; the lifting ring 401 is used to install the safety hook of the crane to realize the lifting of the box-type workpiece 1; a mounting ring 404 is processed on each of the two side plates 403 of the load-bearing frame 4; the two mounting rings 404 are equal in size and coaxial; the two side plates 403 of the U-shaped structure are respectively inserted into the through hole c and the through hole d, at this time, the two mounting rings 404 on the two side plates 403 are coaxial with the fixing ring 603; the open end of the U-shaped structure of the load-bearing frame 4 is used to provide installation space for the upper fixing plate 5 and the lower fixing plate 6, and at the same time, it can also reduce the overall weight of the hanger;

[0047] like Figure 8As shown, the load-bearing rod 9 is a solid round rod, and its two ends are respectively processed with external threads 901; the outer diameter of the load-bearing rod 9 is smaller than the inner diameter of the two mounting rings 404 and the fixing ring 603; the load-bearing rod 9 is inserted into a mounting ring 404, a fixing ring 603 and another mounting ring 404 in sequence; after the load-bearing rod 9 is inserted into the mounting ring 404 and the fixing ring 603, two nuts 8 are respectively threadedly connected on the external threads 901 at both ends of the load-bearing rod 9; the two nuts 8 are respectively pressed on the two side plates of the load-bearing frame 4 to realize the installation of the load-bearing rod 9; the load-bearing rod 9 is an important load-bearing member of the hanger, and when the crane lifts or suspends the box-type workpiece 1, the load-bearing rod 9 bears the weight of the box-type workpiece 1; the thickness of the load-bearing rod 9 is adjusted according to the weight of the hanger, the weight of the box-type workpiece 1 and the temperature in the pit furnace, and the inner diameters of the mounting ring 404 and the fixing ring 603 are adjusted by the thickness of the load-bearing rod 9;

[0048] like Figure 3 As shown, the support rod 2 is a solid round rod, and the support rod 2 passes through and is installed on the load-bearing ring 402; the outer diameter of the support rod 2 is smaller than the inner diameter of the load-bearing ring 402, so that the support rod 2 can smoothly pass through the load-bearing ring 402; when the box-type workpiece 1 is placed in the pit furnace, the support rod 2 is placed on the load-bearing structure in the pit furnace, and the box-type workpiece 1 is suspended on the load-bearing structure of the pit furnace through the support rod 2. At this time, the support rod 2 and the load-bearing rod 9 bear the weight of the box-type workpiece 1 together; the thickness of the support rod 2 is adjusted according to the weight of the hanger, the weight of the box-type workpiece 1 and the temperature in the pit furnace, and the inner diameter of the load-bearing ring 402 is adjusted by the thickness of the support rod 2;

[0049] The inner diameter of the two positioning rings 3 is larger than the outer diameter of the support rod 2; Figure 4 As shown, each of the positioning rings 3 is processed with more than three threaded holes in the radial direction, and the three threaded holes are evenly distributed along the circumference of the positioning ring 3; the two positioning rings 3 are respectively inserted and fixed from the two ends of the support rod 2, and the two positioning rings 3 are respectively located on both sides of the load-bearing ring 402; each of the threaded holes is provided with a bolt 7, and the bolt 7 is screwed into the threaded hole to achieve axial limitation and fixation of the support rod 2; through the coordinated use of the two positioning rings 3, the load-bearing frame 4 equipped with the fixing plate assembly and the box-type workpiece 1 is located at the center position of the length direction of the support rod 2, thereby ensuring that the gravity of the box-type workpiece 1 and the hanger can be evenly transmitted to the two ends of the support rod 2, so that the box-type workpiece can be stably suspended in the shaft furnace;

[0050] In the installed hanger, the support rod 2 and the load-bearing rod 9 are perpendicular to each other, ensuring that the hanger is evenly stressed and that the box-type workpiece is stably suspended.

[0051] Working principle:

[0052] The hanger in this embodiment is used for lifting the box-like workpiece 1; the fixed plate assembly in the hanger can clamp the surface a of the box-like workpiece 1, so that the hanger can clamp the box-like workpiece 1; the safety hook of the crane hooks the lifting ring 401 of the load-bearing frame 4 to realize the lifting of the box-like workpiece 1; when the crane lifts the box-like workpiece 1, the weight of the box-like workpiece 1 is applied to the load-bearing rod 9 and the lifting ring 401;

[0053] After the crane lifts the box-like workpiece 1 and places it on the load-bearing plate in the pit furnace, the safety hook is removed. At this time, the support rod 2 and the load-bearing rod 9 simultaneously bear the gravity of the box-like workpiece 1;

[0054] Since the hanger in the present application does not require welding tooling on the workpiece, the workpiece can be hoisted and suspended by the hanger, which can avoid welding changing the performance of the workpiece itself, thereby causing problems such as weld falling off.

[0055] The above utility model patent only analyzes one structural form. In the production of similar workpieces, the size and material of the hanger can be optimized according to the weight of the workpiece, heating temperature, insulation time, and cooling method. The high-temperature working strength of all parts of the hanger must be ensured to prevent bending or breaking during high-temperature operation, which may cause production safety accidents.

[0056] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A box-type pit furnace heat treatment hanger, characterized in that: Used for lifting and hanging box-type workpieces (1); A through hole a is machined on one end face of a box-like workpiece (1), and the end face is referred to as face a; The hanger comprises: a supporting rod (2), a load-bearing rod (9), a load-bearing frame (4) and a fixing plate assembly; The fixing plate assembly is installed at the through hole a of the box-like workpiece (1) and divides the through hole a into two fan-shaped through holes; a fixing ring (603) is fixedly connected to the bottom of the fixing plate assembly; The load-bearing frame (4) is a U-shaped structure, with the open end of the U-shaped structure facing downward; a through hole is processed in the middle part of the U-shaped structure along its thickness direction, and the through hole is used as a load-bearing ring (402); a mounting ring (404) is processed on each of the two side plates (403) of the U-shaped structure, and the two mounting rings (404) are equal in size and coaxial; the two side plates (403) of the U-shaped structure are respectively inserted into the two fan-shaped through holes, and the two mounting rings (404) are coaxial with the fixing ring (603); The load-bearing rod (9) is sequentially inserted into and installed in the mounting ring (404), the fixing ring (603) and another mounting ring (404); the supporting rod (2) passes through and is installed in the load-bearing ring (402); the box-like workpiece (1) is suspended in the pit furnace by the supporting rod (2); when suspended, the weight of the box-like workpiece (1) is simultaneously applied to the supporting rod (2) and the load-bearing rod (9).

2. A box-type furnace heat treatment hanger as claimed in claim 1, characterized in that: The hanger also includes two positioning rings (3); The inner diameters of the two positioning rings (3) are both larger than the outer diameter of the support rod (2); each positioning ring (3) is provided with more than three threaded holes in a radial direction, and the three threaded holes are evenly distributed along the circumference of the positioning ring (3); The two positioning rings (3) are respectively inserted into and fixed at both ends of the support rod (2), and the two positioning rings are respectively located on both sides of the load-bearing ring (402); Each threaded hole on the positioning ring (3) is provided with a bolt (7), and the axial position limiting and fixing of the supporting rod (2) is achieved by screwing the bolt (7) into the threaded hole.

3. A box-type furnace heat treatment hanger as claimed in claim 1, characterized in that: The fixing plate assembly comprises: an upper fixing plate (5) and a lower fixing plate (6); The upper fixing plate (5) and the lower fixing plate (6) are both rectangular plates, and two through holes perpendicular to the end faces of the rectangular plates are processed on the rectangular plates, and the two through holes are symmetrically located at the two ends of the rectangular plates; The upper fixing plate (5) and the lower fixing plate (6) are arranged opposite to each other in the upper and lower end surfaces at the through hole a of the surface a, respectively. The two through holes on the upper fixing plate (5) are opposite to the two through holes on the lower fixing plate (6) one by one. The two bolts (7) are respectively inserted into the two through holes on the upper fixing plate (5) and then respectively inserted into the two through holes on the lower fixing plate (6) to realize the installation and fixation between the upper fixing plate (5) and the lower fixing plate (6), and to clamp the surface a of the box-like workpiece (1) between the fixing plate (5) and the lower fixing plate (6). The fixing ring (603) is fixedly connected to the bottom surface of the lower fixing plate (6).

4. A box-type furnace heat treatment rack as claimed in claim 1, characterized in that: The support rod (2) and the load-bearing rod (9) mounted on the fixing ring (603) are perpendicular.

5. A heat treatment rack for a box-type pit furnace as claimed in claim 1, characterized in that: A through hole is also processed in the middle part of the U-shaped structure of the load-bearing frame (4), so that the through hole serves as a lifting ring (401); the lifting ring (401) and the load-bearing ring (402) are arranged up and down, and the lifting ring (401) is located above the load-bearing ring (402); the lifting ring (401) is used to lift the box-type workpiece (1), and when lifting the box-type workpiece (1), the weight of the box-type workpiece (1) is applied to the load-bearing rod (9) and the lifting ring (401).

6. A heat treatment rack for a box-type pit furnace as claimed in any one of claims 1 to 4, characterized in that: Both ends of the load-bearing rod (9) are respectively processed with external threads (901); After the load-bearing rod (9) is inserted into the mounting ring (404) and the fixing ring (603), two nuts (8) are respectively threadedly connected to the external threads (901) at both ends of the load-bearing rod (9); the two nuts (8) are respectively pressed against the two side plates of the load-bearing frame (4) to achieve locking and fixing of the load-bearing rod (9).

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