Tool for hoisting turbine bearing upper cover body

Abstract

The utility model provides a tool for hoisting a bearing upper cover body of a steam turbine, which comprises a hanging bracket, a hanging ring, a bearing upper cover body, a connecting plate, a connecting screw and a hoisting plate, hanging rings are detachably mounted on the upper end surfaces of the hanging bracket and the hoisting plate; a through hole is transversely formed in the portion, close to the lower end, of a hanger body of the hanger, and a threaded connecting column is detachably arranged in the through hole. The end, facing the lifting plate, of a threaded connecting column arranged on the lifting frame extends to the outside and is fixedly installed in a lifting ring on the lifting plate. The lifting plate is of an arch structure, and fixing flat plates are integrally arranged at the two ends of the lifting plate. Two connecting plates are symmetrically installed on the upper end face of the bearing upper cover body, and the fixing flat plates are installed on the upper end faces of the corresponding connecting plates respectively. The lifting frame and the lifting plate are connected through the threaded connecting column, the distance between the lifting plate and the side face of the lifting frame can be adjusted through the threaded connecting column, meanwhile, the lifting plate is provided with an arch-shaped structure, and the lifting plate and the steam turbine bearing upper cover body cannot interfere with each other.

Description

Technical Field

[0001] This utility model relates to the field of lifting device technology, specifically a tooling for lifting the upper cover of a steam turbine bearing. Background Technology

[0002] During the manufacturing and subsequent maintenance of steam turbines, it is necessary to lift the turbine bearing cover body. However, due to the special shape and large weight of the bearing cover body, and the fact that the split surface of the existing steam turbine bearing is designed to be located under the turbine diffuser plate, the side of the turbine diffuser plate interferes with the wire rope when the bearing cover body is lifted, making it impossible to assemble the bearing cover body onto the bearing. Therefore, special tooling is required to lift the steam turbine bearing cover body.

[0003] In the prior art, the utility model patent with patent number CN202322189430.X discloses a lifting device for disassembling and assembling the upper cover of a steam turbine rear bearing housing, including a second lifting workpiece. The two ends of the second lifting workpiece are respectively provided with a first lifting workpiece and a third lifting workpiece. The first lifting workpiece and the third lifting workpiece are arranged in parallel. The two ends of the second lifting workpiece are respectively welded to one end of the first lifting workpiece and the third lifting workpiece with a second reinforcing rib.

[0004] The lifting device provided by the aforementioned patent connects the first lifting workpiece to the third lifting workpiece using a steel wire rope. The first lifting workpiece's lifting lugs then lift the bearing housing cover. Only two people are required to complete the disassembly and lifting work: one person is responsible for tying the steel wire rope to connect the lifting tool to the crane, and the other person is responsible for lifting the bearing housing cover. This prevents damage to the rear bearing, vibration probe, and other components caused by traditional disassembly and lifting methods, greatly improving on-site maintenance efficiency and saving maintenance time. However, this lifting device fixes the first, second, and third lifting workpieces in a fixed position, limiting its applicability to turbine bearing cover bodies of fixed dimensions and requiring further improvement. Utility Model Content

[0005] The purpose of this utility model is to provide a tooling for lifting the upper cover of a steam turbine bearing, which aims to improve the problem that the components in the existing lifting devices for lifting the upper cover of a steam turbine bearing are fixed, resulting in poor applicability as they can only be applied to the upper cover of a steam turbine bearing of a fixed size.

[0006] This utility model is implemented as follows:

[0007] A jig for lifting a turbine bearing cover body includes a hanger, lifting rings, and the bearing cover body itself, as well as connecting plates, connecting screws, and a lifting plate. Lifting rings are detachably mounted on the upper surfaces of both the hanger and the lifting plate. A through hole is transversely provided on the lower end of the hanger frame, and a threaded connecting post is detachably installed in the through hole. One end of the threaded connecting post on the hanger extends towards the lifting plate and is externally fastened to a lifting ring on the lifting plate. The lifting plate has an arched structure, and fixed plates are integrally provided at both ends of the lifting plate. Two connecting plates are symmetrically installed on the upper surface of the bearing cover body, and the fixed plates at both ends of the lifting plate are respectively installed on the upper surfaces of the corresponding connecting plates using matching connecting screws.

[0008] Preferably, it also includes an adjustment frame, which includes a first mounting plate and a second mounting plate, the distance between the first mounting plate and the second mounting plate being adjustable; the second mounting plate is detachably mounted on the upper end face of the connecting plate by means of matching connecting screws, and the first mounting plate is detachably mounted on the lower end face of the fixed plate by means of matching connecting screws.

[0009] Preferably, a fixing rod is fixedly provided on the lower end face of the first mounting plate, and a third mounting plate is fixedly provided on the lower end face of the fixing rod. Adjustment holes are provided at both ends of the third mounting plate. A screw is fixedly provided on the upper end face of the second mounting plate corresponding to the position of the adjustment hole. The screw is inserted into the adjustment hole, and a limiting nut located at the upper and lower ends of the third mounting plate is installed on the screw.

[0010] Preferably, the hanger includes a horizontal plate and a vertical plate. The horizontal plate is fixedly installed on the upper side of the vertical plate. A plurality of first lifting ring mounting holes are sequentially provided on the upper surface of the horizontal plate along its length. The lifting ring can be detachably installed in any one of the first lifting ring mounting holes. A through hole is opened near the lower end of the vertical plate. A threaded connecting post is detachably installed in the through hole.

[0011] Preferably, it also includes a locking nut, one end of the threaded connecting column is fixedly installed in the through hole of the vertical plate by the locking nut, and the other end is limited in the lifting ring on the lifting plate by the locking nut.

[0012] Preferably, the connecting plate has fixing screw holes at both ends, and the upper end face of the bearing cover body has matching mounting screw holes drilled at the positions corresponding to the fixing screw holes. The fixing screw holes in the connecting plate and the mounting screw holes on the bearing cover body are fixedly connected by matching connecting screws.

[0013] Preferably, a second lifting ring mounting hole is provided at the middle of the upper end face of the arched structure of the lifting plate, and the lifting ring is detachably installed in the second lifting ring mounting hole.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model connects the hanger and the lifting plate with threaded connecting columns, allowing the distance of the lifting plate on the side of the hanger to be adjusted via the threaded connecting columns, thus facilitating control of its extended length. It is suitable for lifting turbine bearing cover bodies of various shapes. Furthermore, by setting the lifting plate with an arched structure and connecting it with a connecting plate, interference between the lifting plate and the turbine bearing cover body is prevented, improving the applicability of the device.

[0016] 2. This utility model, by setting an adjustable frame that can adjust the spacing, allows for easy adjustment of the gap between the lifting plate and the turbine bearing cover body by setting the adjustable frame between the connecting plate and the lifting plate, making the device suitable for turbine bearing cover bodies of various sizes. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the side of this utility model;

[0018] Figure 2 This is a front structural diagram of the present invention;

[0019] Figure 3 This is a cross-sectional structural schematic diagram of the hanger of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the connecting plate of this utility model;

[0021] Figure 5 This is a structural schematic diagram of the lifting plate of this utility model;

[0022] Figure 6 This is a schematic diagram of the installation structure of the adjustment frame of this utility model;

[0023] Figure 7 This is a three-dimensional structural diagram of the adjustment frame of this utility model.

[0024] 1. Hanger; 101. Horizontal plate; 102. Vertical plate; 103. First lifting ring mounting hole; 104. Through hole; 2. Locking nut; 3. Lifting ring; 4. Threaded connecting column; 5. Connecting plate; 501. Fixing screw hole; 6. Connecting screw; 7. Lifting plate; 701. Fixing plate; 702. Second lifting ring mounting hole; 8. Bearing upper cover body; 9. Adjusting bracket; 901. First mounting plate; 902. Second mounting plate; 903. Fixing rod; 904. Third mounting plate; 905. Screw; 906. Limit nut. Detailed Implementation

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0027] Example 1

[0028] like Figure 1 , Figure 3 and Figure 5 As shown, a jig for lifting the upper cover of a steam turbine bearing includes a hanger 1, a lifting ring 3, and the upper cover body 8. It also includes a connecting plate 5, connecting screws 6, and a lifting plate 7. The upper surfaces of both the hanger 1 and the lifting plate 7 are detachably fitted with lifting rings 3. The lifting rings 3 facilitate lifting the device. A through hole 104 is horizontally provided on the frame near the lower end of the hanger 1, and a threaded connecting post 4 is detachably installed in the through hole 104. The hanger 1 includes a horizontal plate 101 and a vertical plate 102. The horizontal plate 101 is fixedly installed on the upper side of the vertical plate 102. Multiple first lifting ring mounting holes 103 are sequentially provided along the length of the upper surface of the horizontal plate 101, and the lifting ring 3 can be detachably installed in any one of the first lifting ring mounting holes 103. A through hole 104 is provided near the lower end of the vertical plate 102, and a threaded connecting post 4 is detachably installed in the through hole 104. The threaded connecting column 4 is mainly installed at one end in the through hole 104 and the other end extends above the lifting plate 7, where it is inserted into the lifting ring 3 on the lifting plate 7. Its main purpose is to create an offset distance between the lifting frame 1 and the lifting plate 7, thereby avoiding the side of the turbine and not affecting the normal lifting of the bearing cover body 8. A second lifting ring mounting hole 702 is provided at the middle of the upper end face of the arched structure of the lifting plate 7, and the lifting ring 3 is detachably installed in the second lifting ring mounting hole 702.

[0029] like Figure 2 , Figure 4 and Figure 5As shown, the hanger 1 is equipped with a threaded connecting post 4 extending from one end toward the lifting plate 7 and fastened to the lifting ring 3 on the lifting plate 7. It also includes a locking nut 2. One end of the threaded connecting post 4 is fixedly installed in the through hole 104 of the vertical plate 102 by the locking nut 2, and the other end is limited by the locking nut 2 and installed in the lifting ring 3 on the lifting plate 7. The lifting plate 7 has an arched structure, with fixed plates 701 integrally provided at both ends. Two connecting plates 5 are symmetrically installed on the upper end face of the bearing cover body 8. The connecting plates 5 have fixing screw holes 501 at both ends. Corresponding mounting screw holes are drilled on the upper end face of the bearing cover body 8 at the positions of the fixing screw holes 501. Lifting mounting screw holes are drilled on the upper surfaces of the two side plates on the split surface of the bearing cover body 8, mainly for fixing the connecting plates 5. The fixing screw holes 501 in the connecting plates 5 and the mounting screw holes on the bearing cover body 8 are fixedly connected by corresponding connecting screws 6. The fixed plates 701 at both ends of the lifting plate 7 are respectively installed on the upper surface of the corresponding connecting plate 5 by matching connecting screws 6.

[0030] like Figure 6 and Figure 7 As shown, it also includes an adjustment frame 9, which includes a first mounting plate 901 and a second mounting plate 902. The distance between the first mounting plate 901 and the second mounting plate 902 is adjustable. A fixing rod 903 is fixedly installed on the lower end face of the first mounting plate 901, and a third mounting plate 904 is fixedly installed on the lower end face of the fixing rod 903. Adjustment holes are provided at both ends of the third mounting plate 904. Screws 905 are fixedly installed on the upper end face of the second mounting plate 902, corresponding to the positions of the adjustment holes. The screws 905 are inserted into the adjustment holes, and limit nuts 906 located at the upper and lower ends of the third mounting plate 904 are installed on the screws 905. The second mounting plate 902 is detachably installed on the upper end face of the connecting plate 5 by means of matching connecting screws 6, and the first mounting plate 901 is detachably installed on the lower end face of the fixed plate 701 by means of matching connecting screws 6. By setting the adjustment bracket 9, the operator can easily adjust the distance between the lifting plate 7 and the bearing cover body 8, preventing the outer diameter of the bearing cover body 8 from being too large, which would prevent the lifting plate 7 from being installed.

[0031] Example 2

[0032] like Figure 1 , Figure 3 and Figure 5As shown, a jig for lifting the upper cover of a steam turbine bearing includes a hanger 1, a lifting ring 3, and the upper cover body 8. It also includes a connecting plate 5, connecting screws 6, and a lifting plate 7. The upper surfaces of the hanger 1 and the lifting plate 7 can be detachably fitted with lifting rings 3. A through hole 104 is provided horizontally on the frame near the lower end of the hanger 1, and a threaded connecting post 4 is detachably installed in the through hole 104. The hanger 1 includes a horizontal plate 101 and a vertical plate 102. The horizontal plate 101 is fixedly installed on the upper side of the vertical plate 102. A plurality of first lifting ring mounting holes 103 are sequentially provided on the upper surface of the horizontal plate 101 along its length. The lifting ring 3 can be detachably installed in any one of the first lifting ring mounting holes 103. A through hole 104 is opened near the lower end of the plate of the vertical plate 102, and a threaded connecting post 4 is detachably installed in the through hole 104. A second lifting ring mounting hole 702 is provided at the middle of the upper end face of the arched structure of the lifting plate 7, and the lifting ring 3 can be detachably installed in the second lifting ring mounting hole 702.

[0033] like Figure 2 , Figure 4 and Figure 5 As shown, the hanger 1 is equipped with a threaded connecting post 4 extending from one end toward the lifting plate 7 and fastened to the lifting ring 3 on the lifting plate 7. It also includes a locking nut 2. One end of the threaded connecting post 4 is fixedly installed in the through hole 104 of the vertical plate 102 by the locking nut 2, and the other end is limited by the locking nut 2 and installed in the lifting ring 3 on the lifting plate 7. The lifting plate 7 has an arched structure, and fixed plates 701 are integrally provided at both ends of the lifting plate 7. Two connecting plates 5 are symmetrically installed on the upper end face of the bearing cover body 8. Fixed screw holes 501 are provided at both ends of the connecting plates 5. Corresponding mounting screw holes 501 are drilled on the upper end face of the bearing cover body 8 at the corresponding positions of the fixed screw holes 501. The fixed screw holes 501 in the connecting plates 5 and the mounting screw holes on the bearing cover body 8 are fixedly connected by corresponding connecting screws 6. The fixed plates 701 at both ends of the lifting plate 7 are respectively installed on the upper end face of the corresponding connecting plates 5 by corresponding connecting screws 6.

[0034] like Figure 6 and Figure 7As shown, it also includes an adjustment frame 9, which includes a first mounting plate 901 and a second mounting plate 902. The distance between the first mounting plate 901 and the second mounting plate 902 is adjustable. A fixing rod 903 is fixedly installed on the lower end face of the first mounting plate 901, and a third mounting plate 904 is fixedly installed on the lower end face of the fixing rod 903. Adjustment holes are provided at both ends of the third mounting plate 904. Screws 905 are fixedly installed on the upper end face of the second mounting plate 902, corresponding to the positions of the adjustment holes. The screws 905 are inserted into the adjustment holes, and limit nuts 906 located at the upper and lower ends of the third mounting plate 904 are installed on the screws 905. The second mounting plate 902 is detachably installed on the upper end face of the connecting plate 5 by means of matching connecting screws 6, and the first mounting plate 901 is detachably installed on the lower end face of the fixed plate 701 by means of matching connecting screws 6.

[0035] Working principle: First, the connecting plate 5 is fixedly installed on the upper surface of the bearing cover body 8, and then the lifting plate 7 is installed on the connecting plate 5. Then, the lifting frame 1 is lifted using a wire rope, and the threaded connecting column 4 installed at the lower end of the lifting frame 1 facing the lifting plate 7 is installed in the lifting ring 3 on the lifting plate 7, so that the lifting frame 1 will not contact the side of the turbine, thus achieving normal lifting. When the curvature of the lifting plate 7 is smaller than the curvature of the outer surface of the bearing cover body 8, making it impossible to install the lifting plate 7, the adjusting frame 9 can be set between the lifting plate 7 and the connecting plate 5 to widen the distance between the lifting plate 7 and the bearing cover body 8, so that the lifting plate 7 can be installed normally.

[0036] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hoisting fixture for lifting the upper cover body of a steam turbine bearing, comprising a lifting frame (1), a lifting ring (3), and the upper cover body of the bearing (8), characterized in that, It also includes a connecting plate (5), connecting screws (6) and a lifting plate (7); the upper surfaces of the hanger (1) and the lifting plate (7) are detachably equipped with lifting rings (3); a through hole (104) is provided horizontally on the frame near the lower end of the hanger (1), and a threaded connecting column (4) is detachably installed in the through hole (104); the threaded connecting column (4) on the hanger (1) extends to the lifting ring (3) on the outside and is fastened to the outside of the lifting plate (7); the lifting plate (7) is an arched structure, and fixed plates (701) are integrally provided at both ends of the lifting plate (7); two connecting plates (5) are symmetrically installed on the upper surface of the bearing cover body (8), and the fixed plates (701) at both ends of the lifting plate (7) are respectively installed on the upper surface of the corresponding connecting plate (5) by matching connecting screws (6).

2. The tooling for lifting the upper cover of a steam turbine bearing according to claim 1, characterized in that, It also includes an adjustment frame (9), which includes a first mounting plate (901) and a second mounting plate (902). The distance between the first mounting plate (901) and the second mounting plate (902) is adjustable. The second mounting plate (902) is detachably mounted on the upper end face of the connecting plate (5) by a matching connecting screw (6), and the first mounting plate (901) is detachably mounted on the lower end face of the fixed plate (701) by a matching connecting screw (6).

3. The tooling for lifting the upper cover of a steam turbine bearing according to claim 2, characterized in that, A fixing rod (903) is fixedly installed on the lower end face of the first mounting plate (901), and a third mounting plate (904) is fixedly installed on the lower end face of the fixing rod (903). Adjustment holes are provided at both ends of the third mounting plate (904). A screw (905) is fixedly installed on the upper end face of the second mounting plate (902) corresponding to the position of the adjustment hole. The screw (905) is inserted into the adjustment hole, and a limiting nut (906) located at the upper and lower ends of the third mounting plate (904) is installed on the screw (905).

4. The tooling for lifting the upper cover of a steam turbine bearing according to claim 1, characterized in that, The hanger (1) includes a horizontal plate (101) and a vertical plate (102). The horizontal plate (101) is fixedly installed on the upper side of the vertical plate (102). A plurality of first lifting ring mounting holes (103) are arranged sequentially along the length of the upper surface of the horizontal plate (101). The lifting ring (3) can be detachably installed in any one of the first lifting ring mounting holes (103). A through hole (104) is opened near the lower end of the plate body of the vertical plate (102). A threaded connecting post (4) is detachably installed in the through hole (104).

5. The tooling for lifting the upper cover of a steam turbine bearing according to claim 1, characterized in that, It also includes a locking nut (2), one end of the threaded connecting column (4) is fixedly installed in the through hole (104) of the vertical plate (102) by the locking nut (2), and the other end is limited in the lifting ring (3) on the lifting plate (7) by the locking nut (2).

6. The tooling for lifting the upper cover of a steam turbine bearing according to claim 1, characterized in that, The connecting plate (5) has fixing screw holes (501) at both ends. The upper end face of the bearing cover body (8) is drilled with matching mounting screw holes corresponding to the fixing screw holes (501). The fixing screw holes (501) in the connecting plate (5) and the mounting screw holes on the bearing cover body (8) are fixedly connected by matching connecting screws (6).

7. The tooling for lifting the upper cover of a steam turbine bearing according to claim 1, characterized in that, The lifting plate (7) has a second lifting ring mounting hole (702) at the middle of the upper end face of the arched structure. The lifting ring (3) can be detachably installed in the second lifting ring mounting hole (702).

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