Heat treatment device for large straight plate forgings

Abstract

The utility model discloses a heat treatment device for large-sized straight plate forgings, which relates to the technical field of heat treatment for large-sized forgings and comprises a support device, the support device comprises a tray, first vertical plates are fixedly arranged on two sides of the tray respectively, and a second vertical plate is fixedly arranged between the first vertical plates. And a certain distance is formed between the second vertical plate and the first vertical plates on the two sides. The heat treatment device is simple in structure, easy and convenient to operate, stable, safe, capable of effectively reducing deformation of the large straight plate forgings in the heat treatment process, capable of meeting the requirement for cooling uniformity, convenient to operate and capable of improving production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment of large forgings, in particular to a heat treatment device for large straight plate forgings. Background Technique

[0002] The statements in this part only provide background technical information related to the present disclosure, and do not necessarily constitute prior art.

[0003] The production of large forgings is an important part of the heavy machinery manufacturing industry and plays an important role in the development of the national economy. With the development of industries such as large-scale nuclear power, petrochemical, and equipment manufacturing, the demand for some large long plate forgings is increasing. Large long plate forgings have a flat shape. Compared with the thickness direction, their dimensions in the length and width directions are relatively large, with a length of about six or seven meters, or even up to about ten meters, and a width that can also reach about two or three meters, while the thickness is only about two or three hundred millimeters. Due to their large size and weight and special shape, in the heat treatment process, how to load the furnace for heating and unload the furnace for quenching and cooling has an important impact on the heat treatment performance and dimensional deformation of the forgings.

[0004] Considering the stability and safety of the workpiece during the production process, large straight plate forgings are conventionally loaded into the furnace and quenched horizontally. During the horizontal furnace loading and heating process of large straight plate forgings, due to the relatively small size in the thickness direction, large deformation is likely to occur under the action of its own gravity and thermal stress at high temperature. This requires straightening treatment after heat treatment or increasing the heat treatment allowance of the forgings, thus increasing the production cost. During the quenching and cooling process, due to the relatively large cross-sectional size of the forgings in the horizontal direction, a large amount of steam film is generated on the lower large plane of the forgings after quenching into water, affecting the quenching and cooling speed and seriously affecting the performance and uniformity of the workpiece. Moreover, during the quenching and cooling process of being lifted horizontally, the workpiece is also prone to serious deformation under the action of thermal stress and tissue stress. Content of the Utility Model

[0005] In order to solve the technical problems existing in the prior art, the utility model provides a heat treatment device for large straight plate forgings, which has a simple structure, is easy to operate, stable and safe, can effectively reduce the deformation of large straight plate forgings during the heat treatment process, meet the requirements of cooling uniformity, is convenient to operate, and improves production efficiency.

[0006] To achieve the above object, the utility model is realized through the following technical solutions:

[0007] A heat treatment device for large straight plate forgings includes a support device. The support device includes a material tray. First vertical plates are respectively and fixedly arranged on both sides of the material tray. A second vertical plate is fixedly arranged between the first vertical plates, and a certain distance is spaced between the second vertical plate and the first vertical plates on both sides.

[0008] Further technical solution: Two lifting lugs are provided on each side of the material tray, and the lifting lugs on the same side are respectively fixedly arranged at both ends of the material tray.

[0009] Further technical solution: Multiple groups of first vertical plates and second vertical plates can be arranged on the material tray.

[0010] Further technical solution: The first vertical plate, the second vertical plate and the material tray are fixedly connected by welding.

[0011] Further technical solution: It further includes a lifting device. The lifting device includes a cross beam. The top of the cross beam is movably connected to a lifting ring through multiple pairs of chain plates, and the two lateral sides of the bottom of the cross beam are respectively movably connected with a first chain.

[0012] Further technical solution: The chain plates are movably connected to the lifting ring through first shackles.

[0013] Further technical solution: One end of each chain plate in each pair of chain plates is respectively fixedly connected to the two longitudinal sides of the top of the cross beam, and the other end is fixedly connected to the first shackle.

[0014] Further technical solution: Multiple pairs of hanging pieces are fixedly provided on each of the two lateral sides of the bottom of the cross beam.

[0015] Further technical solution: Second shackles are respectively fixedly arranged at both ends of the first chain.

[0016] Further technical solution: The first chain is connected to the hanging pieces at the bottom of the cross beam through the second shackle.

[0017] Advantages of the present utility model:

[0018] The structure of the present utility model is simple, the operation is convenient, it is stable and safe, effectively combines the special shape of large straight forging, the lifting device and the supporting device are used in cooperation, can ensure that the large straight forging keeps a vertical state during the heat treatment heating and quenching cooling process, effectively reduces the deformation degree of the workpiece, improves the quenching cooling effect and product performance, and can realize loading one or more pieces into the furnace at the same time, which is convenient for production control and improves the production efficiency. Description of the drawings

[0019] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification, and are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model.

[0020] Figure 1 It is a structural diagram of the support system of the heat treatment device in the embodiment of the present utility model;

[0021] Figure 2 It is an overall structural diagram of the heat treatment device in the embodiment of the present utility model.

[0022] Among them, 1 - suspension ring, 2 - first shackle, 3 - chain plate, 4 - cross beam, 5 - hanging piece, 6 - chain, 7 - second shackle, 8 - tray, 9 - lifting lug, 10 - first vertical plate, 11 - second vertical plate, 12 - workpiece. Detailed implementation manner

[0023] The following further describes the present utility model in conjunction with the accompanying drawings and specific embodiments.

[0024] As Figure 1 shown, the embodiment of the present utility model provides a heat treatment device for large straight forging, including a support device. The support device includes a tray 8. First vertical plates 10 are respectively and fixedly arranged on both sides of the tray 8. A second vertical plate 11 is fixedly arranged between the first vertical plates 10. A certain distance is spaced between the second vertical plate and the first vertical plates 10 on both sides.

[0025] In this embodiment, as Figure 1 shown, the tray 8 has a rectangular structure. Two lifting lugs 9 are respectively arranged on both sides of the tray 8. The lifting lugs 9 on the same side are respectively fixedly arranged at both ends of the tray 8. That is to say, the lifting lugs 9 are fixedly arranged at the corresponding positions of the four corners of the tray 8. When loading the furnace, the tray is moved by lifting the lifting lugs 9 through the chain. The fixed positions of the lifting lugs can be adjusted according to the actual situation, as long as the tray can be stably lifted through the lifting lugs.

[0026] In some implementation manners, the fixing manner of the first vertical plate 10, the second vertical plate 11 and the tray 8 is welding fixation. The first vertical plate 10, the second vertical plate 11 and the tray can be made of low-carbon cast steel materials, such as ZG25; the vertical plates can be made of low-carbon low-alloy structural steel plates, such as Q235, 25; this embodiment only presents an example, and can be flexibly selected according to the actual situation, without specific limitations.

[0027] The first vertical plate 10 has a triangular structure, making the first vertical plate 10 more stable under pressure and not easily deformed, ensuring the stability of the structure of the support device. In this embodiment, the first vertical plate 10 has a right-angled triangular structure. One right-angled side is fixed on the tray 8, and the other right-angled side is opposite to the second vertical plate 11 and is spaced a certain distance; the second vertical plate 11 has a rectangular structure. The space between the second vertical plate 11 and one side of the first vertical plate 10 is used to place large forgings, and the space between the second vertical plate 11 and the first vertical plate 10 on the other side is also used to place large forgings. The large forgings are placed vertically, and the spacing position is adapted to the thickness of the large forgings. The first vertical plate 10 and the second vertical plate 11 provide the supporting forces on both sides for the large forgings, and the tray 8 provides the supporting force at the bottom for the large forgings, avoiding large deformations of the large forgings under their own gravity and thermal stress when in a high-temperature state.

[0028] The second vertical plate 11 and the first vertical plates 10 on both sides together form a set of vertical plates. In some embodiments, multiple sets of vertical plates can be welded in the length direction of the material tray 8 according to the length of the large forging, so as to provide lateral supporting force at different positions of the forging.

[0029] In some embodiments, according to the heat treatment furnace and the size of the material tray, as well as the different numbers of workpieces loaded into the furnace, two first vertical plates 10 can also be combined and welded on the material tray 8, and the workpiece is placed vertically between the two first vertical plates 10.

[0030] In this embodiment, the heat treatment device further includes a lifting device used in cooperation with the supporting device. The lifting device includes a cross beam 4. The top of the cross beam 4 is movably connected to a lifting ring 1 through multiple pairs of chain plates 3, and the two lateral sides of the bottom of the cross beam 4 are respectively movably connected with a first chain 6. The movable connection means detachable fixation.

[0031] In some embodiments, the cross beam can be made of low alloy high strength structural steel plate, such as Q355. This embodiment only presents an example, and can be flexibly selected according to the actual situation without specific limitation.

[0032] The cross beam 4 is the main load-bearing component of the lifting device, which can bear the weight of the large forging and the lifting device itself, and is connected to the lifting ring 1 through multiple pairs of chain plates 3, forming the core part of the lifting system, ensuring the stability and safety of the entire lifting process. The cross beam 4 not only bears the weight of the forging, but also fixes both sides of the forging through the first chains 6 forming a U-shaped chain, preventing the large forging from tipping over during the moving process.

[0033] The top of the cross beam 4 is movably connected to the lifting ring 1 through multiple pairs of chain plates 3, and the chain plates 3 are movably connected to the lifting ring 1 through the first shackles 2. One end of each chain plate 3 in each pair of chain plates is respectively fixedly connected to the two longitudinal sides of the top of the cross beam 4, and the other end is fixedly connected to the same first shackle 2, and the first shackle 2 is hung on the lifting ring 1 for detachable installation. In this embodiment, a pair of chain plates 3 are connected to each of the two lateral sides of the top of the cross beam 4. That is to say, chain plates are fixedly connected to the corresponding positions at the four corners of the top of the cross beam, so that the cross beam can be lifted smoothly. The multiple pairs of chain plates 3 increase the connection points between the cross beam 4 and the lifting ring 1, thereby improving the stability of the entire lifting device. The lifting ring 1 is directly connected to the hook of a lifting device (such as a crane or a hoist), and transmits the pulling force to the chain plates 3, the cross beam 4, and the first chains 6, and finally to the forging.

[0034] The two lateral sides of the bottom of the cross beam 4 are respectively movably connected with a first chain 6. The first chain 6 is connected to the hanging pieces at the bottom of the cross beam through the second shackles 7 to realize the movable connection between the first chain 6 and the cross beam 4. Multiple pairs of hanging pieces are fixedly provided on the two lateral sides of the bottom of the cross beam 4. The hanging pieces are provided with through holes, and each pair of hanging pieces is connected with a first chain 6.

[0035] Furthermore, each hanger of each pair of hangers is fixedly arranged on the longitudinal two sides of the bottom of the cross beam. The two ends of the first chain 6 are respectively movably connected to the hangers on the longitudinal two sides, so that the first chain forms a U-shaped structure. A first chain 6 is movably connected to the symmetric positions on the two transverse sides of the cross beam 4 respectively, which is used to sleeved the straight plate forging and fix the two sides of the straight plate forging, providing balanced pulling force for it and preventing the forging from falling sideways.

[0036] Furthermore, a plurality of pairs of hangers are fixedly arranged on the two transverse sides of the bottom of the cross beam 4 respectively. Each pair of hangers is arranged in sequence from left to right. The first chain 6 can flexibly select any pair of hangers for movable connection, which can flexibly adjust the position of the first chain 6 on the cross beam 4, can adapt to straight plate forgings of various sizes, and improves the flexibility of the lifting device.

[0037] In some embodiments, 3-6 pairs of hangers can be respectively arranged on the two transverse sides of the bottom of the cross beam 4. The number of pairs of hangers can be flexibly set according to the actual situation and is not specifically limited.

[0038] Furthermore, second shackles 7 are respectively fixedly arranged at the two ends of the first chain 6, and are movably connected to the hangers through the second shackles 7. The setting of the second shackles 7 facilitates the disassembly and installation of the cross beam 4 and the first chain 6, and facilitates the flexible adjustment of the position of the first chain 6.

[0039] The original large straight plate forgings are cooled horizontally with a large plane during the quenching and cooling process, and the forgings are prone to serious deformation. Through the above technical solutions, the straight plate forgings can be vertically lifted by the lifting device, so that the large plane is vertically immersed in the quenching medium. The large plane has stronger anti-deformation ability when vertically lifted and is not easily deformed.

[0040] Detailed description of the working principle:

[0041] When loading and heating the large straight plate forgings, the material tray 8 is moved by lifting the lifting lug 9, and the material tray 8 is placed on the heat treatment furnace trolley or the padding on the trolley. Then, the lifting device is used to lift the straight plate forging and place it on the supporting device, that is, the two first chains 6 are sleeved on both sides of the straight plate forging to vertically lift the straight plate forging. During heating, the straight plate forging is vertically placed between the first vertical plate 10 and the second vertical plate 11, and the straight plate forging provides the supporting force on both sides and the bottom, ensuring that the large straight plate forging remains vertical during the heat treatment heating process and effectively reducing the deformation degree of the workpiece. When taking out of the furnace for quenching, the lifting device is used again to vertically lift the straight plate forging and immerse it in the quenching medium for quenching and cooling, realizing the vertical immersion of the large plane of the straight plate forging.

[0042] Although the specific implementation manners of the present utility model have been described above in conjunction with the accompanying drawings, they are not limitations on the protection scope of the present utility model. Those skilled in the art should understand that, based on the technical solutions of the present utility model, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present utility model.

Claims

1. A heat treatment device for large straight plate forgings, characterized in that: It includes a supporting device, and the supporting device includes a tray. First vertical plates are fixedly arranged on both sides of the tray respectively. A second vertical plate is fixedly arranged between the first vertical plates, and there is a certain distance between the second vertical plate and the first vertical plates on both sides.

2. The heat treatment device for a large straight plate forging as described in claim 1, wherein: Two lifting lugs are arranged on each side of the tray, and the lifting lugs on the same side are fixedly arranged at both ends of the tray respectively.

3. The heat treatment device for a large straight plate forging as described in claim 1, characterized in that: Multiple groups of first vertical plates and second vertical plates can be arranged on the tray.

4. The heat treatment device for a large straight plate forging as described in claim 1, wherein: The first vertical plates, the second vertical plate and the tray are fixedly connected by welding.

5. The heat treatment device for a large straight plate forging as described in claim 1, wherein: It further includes a lifting device, and the lifting device includes a cross beam. The top of the cross beam is movably connected to a lifting ring through multiple pairs of chain plates, and the two lateral sides at the bottom of the cross beam are respectively movably connected with a first chain.

6. The heat treatment device for a large straight plate forging as described in claim 5, wherein: The chain plates are movably connected to the lifting ring through first shackles.

7. The heat treatment device for a large straight plate forging according to claim 6, characterized in that: One end of each chain plate in each pair of chain plates is fixedly connected to the two longitudinal sides at the top of the cross beam respectively, and the other end is fixedly connected to the first shackle.

8. The heat treatment device for a large straight plate forging as described in claim 5, characterized in that: Multiple pairs of hanging pieces are fixedly arranged on each of the two lateral sides at the bottom of the cross beam.

9. The heat treatment device for a large straight plate forging as described in claim 5, characterized in that: Second shackles are fixedly arranged at both ends of the first chain respectively.

10. A heat treatment device for a large straight plate forging as claimed in claim 8 or 9, characterized in that: The first chain is connected to the hanging pieces at the bottom of the cross beam through the second shackles.

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