Vertical slow cooling device

Abstract

The utility model provides a vertical slow cooling device, which relates to the technical field of forging, and comprises an upper slow cooling cover, a lower slow cooling cover and a limit seat, the limit seat is arranged in the lower slow cooling cover, and the limit seat is used for contacting with a rotor forging and keeping the rotor forging in a vertical state. The upper slow cooling cover is used for being in butt joint with the lower slow cooling cover so that the rotor forging can be arranged in a closed space defined by the upper slow cooling cover and the lower slow cooling cover in a covering mode. Compared with the prior art, the vertical slow cooling device is mainly applied to a slow cooling stage after tempering and tempering of million-kilowatt rotor forgings, the slow cooling process does not need to occupy pit furnace resources, and the production efficiency can be improved. Moreover, the rotor forge piece is in a vertical state in the whole cooling process, the coaxiality and straightness of the rotor forge piece can be guaranteed, and the residual stress requirement of the rotor forge piece is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to forging technical field, specifically, relates to a vertical slow cooling device. BACKGROUND

[0002] The low-pressure rotor forging is a key component in the million-kilowatt nuclear power equipment and is used for manufacturing the generator rotor of the million-kilowatt nuclear power unit. The manufacturing requirement of the large rotor forging is very harsh, and the material performance, size precision, internal organization uniformity and other indexes must be ensured, and the technical level of manufacturing is very high.

[0003] The post-forging cooling of the large forging is an indispensable process, and the slow cooling mode must be adopted to ensure the internal quality of the forging. The rotor forging is subjected to the quenching and tempering processes in the vertical furnace charging of the shaft furnace to ensure the uniformity of the internal organization and overall mechanical performance. The tempering slow cooling process is also subjected to the process in the shaft furnace to eliminate the internal stress. However, the current tempering slow cooling stage of the million-kilowatt rotor forging generally has a long period, accounts for more than 1 / 3 of the entire tempering period, occupies the shaft furnace resource, and seriously affects the production efficiency. If the rotor forging is transferred to the trolley furnace for slow cooling in this stage, the coaxiality and straightness cannot be guaranteed, and the residual stress requirement cannot be guaranteed. SUMMARY

[0004] The problem to be solved by the utility model is how to improve the production efficiency of the rotor forging.

[0005] The utility model provides a vertical slow cooling device, include: upper slow cooling cover, slow cooling cover and limit seat, the limit seat set up in slow cooling cover, the limit seat is used for with rotor forging contact and make rotor forging keep vertical state, upper slow cooling cover is used for with slow cooling cover butt joint, with rotor forging cover set in the closed space surrounded by upper slow cooling cover and slow cooling cover.

[0006] The vertical slow cooling device provided by the utility model has the following beneficial effects compared with the prior art, but is not limited to the following:

[0007] The vertical slow cooling device, when in use, the limiting seat can be fixed on the ground steel plate first, then the lower slow cooling cover is sleeved on the limiting seat, and the bottom of the lower slow cooling cover is also fixed on the ground steel plate, the rotor forging can be lifted by using a special lifting appliance, the rotor forging is placed into the lower slow cooling cover along the vertical direction, and the rotor forging is seated on the limiting seat, the limiting seat can keep the rotor forging in the vertical state, then the upper slow cooling cover is lifted by using the lifting appliance, the upper slow cooling cover is seated on the lower slow cooling cover, and the two are connected and fixed, so that the whole rotor forging is covered in the closed space surrounded by the upper slow cooling cover and the lower slow cooling cover, and slow cooling is carried out.

[0008] Optionally, the rotor forging comprises a large-diameter section and two small-diameter sections, the large-diameter section is located between the two small-diameter sections, the limiting seat is provided with a limiting groove in the vertical direction, the limiting groove is used for accommodating the small-diameter sections, and the upper end of the limiting seat is used for abutting against the shaft shoulder of the large-diameter section.

[0009] Optionally, the lower slow cooling cover comprises an upper cylinder body and a lower cylinder body which are connected with each other, the diameter of the lower cylinder body is greater than that of the upper cylinder body, and the end, away from the lower cylinder body, of the upper cylinder body is used for being detachably connected with the upper slow cooling cover.

[0010] Optionally, the outer wall of the upper cylinder body is provided with a first lifting lug.

[0011] Optionally, the upper slow cooling cover is a cylinder structure with an open end and an internal cavity, the lower slow cooling cover is a cylinder structure with two open ends and an internal cavity, and the open end of the upper slow cooling cover and one of the open ends of the lower slow cooling cover are used for being butted against each other to form the closed space.

[0012] Optionally, the end, close to the lower slow cooling cover, of the upper slow cooling cover is provided with a first ring plate, the end, close to the upper slow cooling cover, of the lower slow cooling cover is provided with a second ring plate, a plurality of first connecting holes are formed in the first ring plate, a plurality of second connecting holes are formed in the second ring plate and are coaxially arranged with the first connecting holes, and the first connecting holes and the second connecting holes are used for being connected by a connecting piece.

[0013] Optionally, the end, away from the lower slow cooling cover, of the upper slow cooling cover is provided with a lifting rod, and the end, away from the lower slow cooling cover, of the lifting rod is provided with a lifting flange.

[0014] Optionally, the outer wall of the upper slow cooling cover is provided with a second lifting lug.

[0015] Optionally, the inner part of the upper and lower slow cooling covers are provided with thermal insulation layers.

[0016] Optionally, the thermal insulation layers are made of refractory fiber material. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the vertical slow cooling device of the embodiment of the present application.

[0018] Figure 2 It is a structure schematic view of the upper slow cooling cover of the embodiment of the present application.

[0019] Figure 3 It is a structure schematic view of the lower slow cooling cover and the limiting seat of the embodiment of the present application.

[0020] Figure 4 It is a structure schematic view of the rotor forging of the embodiment of the present application.

[0021] Figure 5 It is a structure schematic view of the rotor forging turning into the lower slow cooling cover of the embodiment of the present application.

[0022] BRIEF DESCRIPTION OF DRAWINGS

[0023] 1, upper slow cooling cover; 11, first ring plate; 12, lifting rod; 13, lifting flange; 14, second lifting lug; 2, lower slow cooling cover; 21, upper cylinder; 22, lower cylinder; 23, second ring plate; 24, first lifting lug; 3, limiting seat; 4, rotor forging; 41, large diameter section; 42, small diameter section. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0025] In the description of the present application, the directions or position relationships indicated by "up", "down", "left", "right", "top", "bottom", "front", "back", "inner" and "outer" are based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the present application, and are not indicative or suggestive of the devices having specific directions, being constructed and operated in specific directions, and therefore cannot be understood as limiting the protection scope of the present application.

[0026] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "arrangement", "installation", "connection", "connect" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication inside two elements.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0027] In the description of the specification, the description of the terms "embodiment", "one embodiment" and "one embodiment" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or embodiment are included in at least one embodiment or embodiment of the utility model.In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or embodiment.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or embodiments in a suitable manner.

[0028] Moreover, the Z axis in the drawing represents the vertical direction, that is, the up-down position, and the positive direction of the Z axis, that is, the arrow direction of the Z axis, represents up, and the negative direction of the Z axis, that is, the direction opposite to the positive direction of the Z axis, represents down.

[0029] It should be noted that the aforementioned Z axis represents the meaning only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0030] As shown in Figure 1 The vertical slow cooling device of the utility model embodiment, including: upper slow cooling cover 1, lower slow cooling cover 2 and limit seat 3, the limit seat 3 is arranged in the lower slow cooling cover 2, the limit seat 3 is used for contacting with rotor forge 4 and make the rotor forge 4 keep vertical state, the upper slow cooling cover 1 is used for butt joint with the lower slow cooling cover 2, to cover the rotor forge 4 in the closed space surrounded by the upper slow cooling cover 1 and the lower slow cooling cover 2.

[0031] In the embodiment, the drawings are combined Figure 1As shown, in use, the limiting seat 3 can be fixed to the foundation steel plate first, and then the lower slow cooling cover 2 can be placed on the limiting seat 3. At the same time, the bottom of the lower slow cooling cover 2 is also fixed to the foundation steel plate. The rotor forging 4 can be lifted using a special lifting tool and placed vertically into the lower slow cooling cover 2, so that the rotor forging 4 sits on the limiting seat 3. The limiting seat 3 can keep the rotor forging 4 in a vertical state. Then, the upper slow cooling cover 1 is lifted using a lifting tool and sits on the lower slow cooling cover 2. The two are then connected and fixed, so that the entire rotor forging 4 is covered in the closed space formed by the upper slow cooling cover 1 and the lower slow cooling cover 2 for slow cooling. Compared with the prior art, the vertical slow cooling device of this utility model is mainly applied to the slow cooling stage after tempering and quenching of megawatt-class rotor forgings 4. The slow cooling process does not require the use of pit furnace resources, which can improve production efficiency. Moreover, the rotor forging 4 remains in a vertical position throughout the entire cooling process, which ensures the coaxiality and straightness of the rotor forging 4 and meets the residual stress requirements of the rotor forging 4.

[0032] It should be noted that the overall weight of the megawatt-class rotor forging is relatively large. The foundation design can adopt a double-layer steel plate laying method, with grouting holes left on the bottom steel plate, and high-strength non-shrink grouting material for grouting reinforcement and hardening.

[0033] Optionally, the rotor forging 4 includes a large-diameter section 41 and two small-diameter sections 42, with the large-diameter section 41 located between the two small-diameter sections 42; the limiting seat 3 has a limiting groove in the vertical direction, the limiting groove is used to accommodate the small-diameter section 42, and the upper end of the limiting seat 3 is used to abut against the shoulder of the large-diameter section 41.

[0034] In this embodiment, in conjunction with the appendix Figure 3 To be continued Figure 5 As shown, the limiting seat 3 can be a frustum structure as a whole, and at the center of the frustum structure along the vertical direction (see attached diagram). Figure 3 A limiting groove is provided in the Z-axis direction. The rotor forging 4 includes a large-diameter section 41 and two small-diameter sections 42, with the large-diameter section 41 located between the two small-diameter sections 42. The rotor forging 4 can be lifted using a U-shaped lifting device and positioned at the lower part (see attached image). Figure 4 The small-diameter section 42 (in the opposite direction of the Z-axis) is inserted into the limiting groove of the limiting seat 3, and the shoulder of the large-diameter section 41 sits on the upper surface of the limiting seat 3. In this way, the limiting seat 3 can ensure that the rotor forging 4 is in a vertical position throughout the entire cooling process (see attached diagram). Figure 5 (Z-axis direction).

[0035] Optionally, the lower slow cooling cover 2 includes an upper cylinder 21 and a lower cylinder 22 connected to each other. The diameter of the lower cylinder 22 is larger than the diameter of the upper cylinder 21. The end of the upper cylinder 21 away from the lower cylinder 22 is used for detachable connection with the upper slow cooling cover 1.

[0036] In this embodiment, in conjunction with the appendix Figure 3 As shown, the lower slow cooling cover 2 can adopt a plate welding structure, and stiffeners can be used to reinforce the parts with greater stress to ensure the safety of the overall structure. The lower slow cooling cover 2 includes an upper cylinder 21 and a lower cylinder 22 that are connected to each other, and the diameter of the lower cylinder 22 is larger than the diameter of the upper cylinder 21. By locally increasing the diameter of the lower cylinder 22, the contact area with the ground foundation can be increased, and the anti-tipping ability can be strengthened.

[0037] Optionally, the outer wall of the upper cylinder 21 is provided with a first lifting lug 24.

[0038] In this embodiment, in conjunction with the appendix Figure 3 As shown, multiple first lifting lugs 24 can be evenly distributed on the outer wall of the upper cylinder 21 to facilitate lifting with lifting equipment.

[0039] Optionally, the upper slow-cooling cover 1 is a cylindrical structure with one open end and an internal cavity, and the lower slow-cooling cover 2 is a cylindrical structure with both open ends and an internal cavity. The open ends of the upper slow-cooling cover 1 and one of the open ends of the lower slow-cooling cover 2 are used to connect with each other to form the closed space.

[0040] In this embodiment, in conjunction with the appendix Figures 1 to 3 As shown, the upper slow-cooling cover 1 is the lower end (attached). Figure 2 The cylindrical structure (in the opposite direction of the Z-axis) has an open opening and an internal cavity. The lower slow-cooling shroud 2 is located at both the upper and lower ends (attached). Figure 3 The upper and lower slow cooling covers 1 and 2 are open cylindrical structures with internal cavities in the Z-axis direction. The upper opening of the upper slow cooling cover 1 and the upper opening of the lower slow cooling cover 2 are used to connect with each other to form a closed space to completely wrap the entire rotor forging 4 inside the slow cooling device. The lower opening of the lower slow cooling cover 2 is used to allow the lower slow cooling cover 2 to be fitted onto the limiting seat 3.

[0041] Optionally, the upper slow cooling cover 1 is provided with a first ring plate 11 at one end near the lower slow cooling cover 2, and the lower slow cooling cover 2 is provided with a second ring plate 23 at one end near the upper slow cooling cover 1. The first ring plate 11 is provided with a plurality of first connecting holes, and the second ring plate 23 is provided with a plurality of second connecting holes coaxially arranged with the first connecting holes. The first connecting holes and the second connecting holes are used to connect through connectors.

[0042] In this embodiment, in conjunction with the appendix Figures 1 to 3As shown, the lower end of the upper slow cooling cover 1 can be connected with the first ring plate 11 by welding, and a plurality of first connecting holes are formed on the first ring plate 11. The upper end of the lower slow cooling cover 2 can be connected with the second ring plate 23 by welding, and a plurality of second connecting holes are formed on the second ring plate 23. The first connecting holes and the second connecting holes can be connected by connecting pieces to connect and fix the upper slow cooling cover 1 and the lower slow cooling cover 2. The connecting pieces can be bolts or pins.

[0043] Optionally, the upper slow cooling cover 1 is provided with a lifting rod 12 at one end away from the lower slow cooling cover 2. The lifting rod 12 is provided with a lifting flange 13 at one end away from the lower slow cooling cover 2.

[0044] In this embodiment, the accompanying drawings are combined. Figure 2 As shown, the upper end of the upper slow cooling cover 1 can be connected with the lifting rod 12 by welding. The lifting flange 13 is connected with the upper end of the lifting rod 12 by welding. The cross section of the combination of the lifting rod 12 and the lifting flange 13 is T-shaped. Thus, the upper slow cooling cover 1 can be lifted by a U-shaped lifting tool.

[0045] Optionally, the outer wall of the upper slow cooling cover 1 is provided with a second lifting lug 14.

[0046] In this embodiment, the accompanying drawings are combined. Figure 2 As shown, a plurality of second lifting lugs 14 can be uniformly arranged on the outer wall of the upper slow cooling cover 1, which facilitates lifting by a lifting tool.

[0047] Optionally, the inner part of the upper slow cooling cover 1 and the lower slow cooling cover 2 is provided with a heat preservation layer.

[0048] In this embodiment, the inner part of the upper slow cooling cover 1 and the lower slow cooling cover 2 is provided with a heat preservation layer, which ensures the slow cooling effect of the rotor forging 4.

[0049] Optionally, the heat preservation layer is made of refractory fiber material.

[0050] In this embodiment, the heat preservation layer can be a refractory fiber felt made of refractory fiber material. The refractory fiber felt is a heat-insulating refractory fiber product made of refractory fiber as raw material and bonding agent through pressure molding. It is used for high-temperature heat insulation.

[0051] The terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features.

[0052] Although the utility model discloses as above, the protection scope of the utility model is not limited to this only.The person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will all fall into the protection scope of the utility model.

Claims

1. A vertical slow cooling device, characterized in that, The application relates to a slow cooling cover for a rotor forging. The rotor forging (4) comprises a large-diameter section (41) and two small-diameter sections (42), the large-diameter section (41) being located between the two small-diameter sections (42); the limiting seat (3) is provided with a limiting groove in a vertical direction, the limiting groove being used for accommodating the small-diameter sections (42), and the upper end of the limiting seat (3) is used for abutting against the shaft shoulder of the large-diameter section (41).

2. The vertical slow cooling device according to claim 1, characterized by The lower slow cooling cover (2) comprises an upper cylinder (21) and a lower cylinder (22) which are connected with each other, the diameter of the lower cylinder (22) is larger than that of the upper cylinder (21), and the end of the upper cylinder (21) away from the lower cylinder (22) is used for being detachably connected with the upper slow cooling cover (1).

3. The vertical slow cooling device according to claim 1, wherein The outer wall of the upper cylinder (21) is provided with a first lifting lug (24).

4. The vertical slow cooling device according to claim 3, characterized by The upper slow cooling cover (1) is a cylinder structure with an open end and an internal cavity, the lower slow cooling cover (2) is a cylinder structure with two open ends and an internal cavity, and the open end of the upper slow cooling cover (1) and one of the open ends of the lower slow cooling cover (2) are used for being mutually butted to form the closed space.

5. The vertical slow cooling device according to claim 1, wherein The end of the upper slow cooling cover (1) close to the lower slow cooling cover (2) is provided with a first ring plate (11), the end of the lower slow cooling cover (2) close to the upper slow cooling cover (1) is provided with a second ring plate (23), a plurality of first connecting holes are formed in the first ring plate (11), a plurality of second connecting holes coaxially arranged with the first connecting holes are formed in the second ring plate (23), and the first connecting holes and the second connecting holes are used for being connected through a connecting piece.

6. The vertical slow cooling device according to claim 5, wherein The end of the upper slow cooling cover (1) away from the lower slow cooling cover (2) is provided with a lifting rod (12), and the end of the lifting rod (12) away from the lower slow cooling cover (2) is provided with a lifting flange (13).

7. The vertical slow cooling device according to claim 1, wherein The outer wall of the upper slow cooling cover (1) is provided with a second lifting lug (14).

8. The vertical slow cooling device according to claim 1, wherein The inner parts of the upper slow cooling cover (1) and the lower slow cooling cover (2) are provided with a heat preservation layer.

9. The vertical slow cooling device according to claim 1, wherein The heat preservation layer is made of refractory fiber material.

10. The vertical slow cooling device according to claim 9, wherein ​

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