Support for overhauling large vertical volute pump
By designing a large vertical volute pump maintenance bracket with open door type, the problem of inconvenience in the maintenance of the impeller core bag in the prior art is solved, and flexible adjustment and efficient maintenance of the impeller core bag are realized, and construction costs and workload are reduced.
Patent Information
- Application Number
- CN202510143034.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2025-04-11
AI Technical Summary
In the prior art, the maintenance of the impeller core bag requires a temporary scaffolding or fixed bracket, which leads to a large workload on site, long construction period and inconvenient adjustment of the level and shaft centering of the impeller core bag. The fixed bracket requires the impeller core bag to be hoisted to a higher height, which increases the construction cost of the pump room.
A large vertical volute pump maintenance bracket is designed, adopting an openable door design. The impeller core bag can enter the inner cavity of the bracket through the movable door. The horizontality of the shaft head, the horizontality of the upper flange and the bearing centering degree are all adjustable. The adjustment method is simple and adopts a pure mechanical structure, which is low in cost and convenient and flexible in operation.
The maintenance of the impeller core pack can be completed without lifting to a high place, simplifying the operation process, reducing workload and construction period, reducing the cost of pump room construction, and improving the flexibility and accuracy of maintenance.
Smart Images
Figure CN119795118A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of maintenance tooling, and in particular relates to a bracket for maintenance of a large vertical volute pump. Background Art
[0002] The vertical volute pump uses the rotating impeller to do work on the conveying medium, so that the conveying medium obtains pressure energy and kinetic energy. The volute collects the medium thrown out by the impeller and discharges the medium to the outlet pipe. Large vertical volute pumps are mainly used in coastal nuclear power, water conservancy and irrigation engineering, thermal power generation and other industries. With the increase in the installed capacity of pump stations, the vertical volute pumps required are becoming larger and larger, and the capacity of each unit exceeds 5000kW. Generally, large vertical volute pumps use on-site welded metal volutes or concrete volutes. The main component for inspection and maintenance is the impeller core pack, which usually weighs at least 25 tons and has an overall height of about 4m. The inspection and reinstallation of the vertical impeller core pack must be completed on the bracket. In the prior art, temporary scaffolding or fixed brackets are used when inspecting the impeller core package. Both methods are inconvenient to use: temporary scaffolding leads to a large workload on site, a long construction period and inconvenience in adjusting the level of the impeller core package and the centering of the shaft system; the fixed bracket requires the impeller core package to be lifted to the top of the entire fixed bracket before it can be dropped, the driving position must be high enough, and the construction cost of the pump room is high. Summary of the invention
[0003] In view of the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a large-scale vertical volute pump maintenance bracket, which is an openable door type maintenance bracket. There is no need to hoist the higher impeller core package to a higher height. The impeller core package can enter the internal volume of the bracket from the openable movable door. The horizontality of the shaft head, the horizontality of the upper flange, and the degree of centering of the upper bearing and the lower bearing are all adjustable, and the adjustment method is simple. It is a purely mechanical structure with low cost and convenient and flexible operation. The bracket structure is simple, reliable and stable.
[0004] In order to achieve the above object, the technical solution adopted by the present invention is:
[0005] A large vertical volute pump maintenance support, comprising a movable door, a flange A, a flange B, a fixed side, a base and a plurality of inclined pads, the base is supported on the ground or a workbench, the fixed side is fixedly installed on the base, the movable door can rotate relative to the fixed side, the movable door serves as a door, when the movable door is closed, the movable door and the fixed side form a cylindrical structure with an internal cavity, the internal cavity can accommodate an impeller core package, flange A and flange B are respectively connected to the top of the movable door and the fixed side, flange A and flange B are both arc-shaped plate structures, when the movable door is closed, flange A and flange B are spliced to form a A circular flange, multiple inclined washers installed on the base are located on the same ring, the impeller core package includes an upper flange, an impeller, and a shaft head. The impeller core package is supported on the bracket through the upper flange and the lower end of the impeller. The impeller is supported on multiple inclined washers. The inclined washers adjust the horizontality of the shaft head connected to the impeller by driving the impeller to move. The upper flange is supported on flange A and flange B. The horizontality of flange A and flange B is adjustable. Flange A and flange B are both provided with centering adjustment bolts for adjusting the position of the central axis of the upper flange. The impeller core package as a whole enters the internal cavity through the opened movable door.
[0006] As a further improvement of the above technical solution:
[0007] Flange A is connected to the movable door through at least two connecting blocks and multiple connecting bolts. At least two connecting blocks are arranged on flange A at intervals. The upper end of the connecting block is fixedly connected to the lower end of flange A. The connecting block and the movable door are detachably connected together through connecting bolts. A waist-shaped hole is provided on the movable door. The connecting bolts pass through the waist-shaped holes on the connecting block and the movable door and are locked by nuts. The position of the connecting bolts on the waist-shaped holes is adjustable to make the height of flange A adjustable. Flange B is connected to the fixed side through at least two connecting blocks and multiple connecting bolts.
[0008] The horizontality of flange A is adjusted by at least two adjusting blocks and at least two horizontal adjusting bolts. The adjusting block is fixedly connected to the upper end of the movable door. Each adjusting block is provided with a horizontal adjusting bolt. The horizontal adjusting bolt contacts the bottom of flange A after passing through the adjusting block from bottom to top. The height of the upper end of the horizontal adjusting bolt extending out of the adjusting block can be adjusted by rotating each horizontal adjusting bolt, thereby adjusting the horizontality and height of flange A in contact therewith. After the horizontality of flange A is adjusted by the horizontal adjusting bolt, the nut matched with the connecting bolt is locked. The horizontality of flange B is adjusted by at least two adjusting blocks and at least two horizontal adjusting bolts. The adjusting block for adjusting flange B is fixed at the upper end of the fixed side.
[0009] A plurality of centering adjustment bolts are respectively arranged on the top of flange A and flange B. The centering adjustment bolts on flange A are arranged at intervals along the circumference of flange A, and the centering adjustment bolts on flange B are arranged at intervals along the circumference of flange B. All the centering adjustment bolts are arranged around the upper flange. When the centering adjustment bolts are rotated, one end of the centering adjustment bolts can contact and push the upper flange.
[0010] The inclined washer includes a pad, a pad seat and a pad bolt. The pad seat is placed on the base, and the pad is slidably arranged on the pad seat. The contact surface between the pad and the pad seat is an inclined surface, and the two ends of the pad bolt are respectively connected to the pad and the pad seat. The pad is driven to slide by adjusting the pad bolt, thereby driving the impeller of the impeller core package supported on the pad to move.
[0011] The bottom of the movable door is connected to a support plate, and the bottom of the support plate is detachably connected to a caster, which is supported on the ground or a workbench. An arc-shaped caster groove for inserting the caster is provided on the base, and the height of the base is lower than the height of the caster. The width of the support plate is larger than the width of the caster groove. When the movable door is closed, the caster enters the caster groove. After the caster is removed, the movable door can be dropped until the support plate spans the caster groove and is supported on the base.
[0012] At least two casters are provided, the number of caster grooves is the same as the number of casters, each caster is connected to a support plate, and when the movable door is closed, each support plate is respectively straddled on each caster groove.
[0013] A limiting block for limiting the position of the movable door is arranged on the base, and when the movable door contacts the limiting block, the movable door is closed in place.
[0014] The movable door and the fixed side are hinged together through a rotating shaft, and the movable door can rotate around the rotating shaft relative to the fixed side.
[0015] Both the fixed side and the movable door are frame structures.
[0016] The beneficial effects of the present invention are: it is an openable door maintenance bracket, there is no need to hoist the higher impeller core package to a higher height, the impeller core package can enter the internal volume of the bracket from the openable movable door, the horizontality of the impeller core package shaft head, the horizontality of the upper flange and the degree of centering of the upper bearing and the lower bearing on the impeller core package are all adjustable, and the adjustment method is simple, all of which are purely mechanical structures, low cost, convenient and flexible to operate, the bracket structure is simple, reliable and stable, and the above-mentioned adjustment facilitates subsequent inspection of the volute pump. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.
[0018] Figure 2It is a schematic diagram of an impeller core package placed in the maintenance bracket according to an embodiment of the present invention. DETAILED DESCRIPTION
[0019] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.
[0020] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0021] A large vertical volute pump maintenance bracket, such as Figure 1 and 2 As shown, it includes casters 1, a movable door 2, a flange A 3, a crossbeam 4, a rotating shaft 5, a centering adjustment bolt 6, a flange B 7, a horizontal adjustment bolt 8, a fixed side 9, a base 10, a limit block 11, and an inclined washer 12.
[0022] The base 10 is supported on the ground or a workbench, and the base 10 is annular. The fixed side 9 is fixedly mounted on the base 10. One end of the movable door 2 is hinged to the fixed side 9, and the movable door 2 can rotate relative to the fixed side 9. The movable door 2 serves as a door. When the movable door 2 is closed, the movable door 2 and the fixed side 9 form a cylindrical structure with an internal cavity, and the internal cavity can accommodate the impeller core package 13; when the movable door 2 is opened, the internal cavity can be connected to the external environment through the opening, so that the impeller core package 13 can enter.
[0023] The movable door 2 and the fixed side 9 are hinged together by the rotating shaft 5. The movable door 2 can rotate relative to the fixed side 9 around the rotating shaft 5. Obviously, the rotating shaft 5 is equivalent to a door hinge. The length direction of the rotating shaft 5 is parallel to the center line direction of the base 10.
[0024] Both the fixed side 9 and the movable door 2 are frame structures. Specifically, the fixed side 9 includes a plurality of reinforcing rods 19 and a plurality of parallel vertical rods 18. Each vertical rod 18 is arranged along the circumference of the base 10. The lower end of each vertical rod 18 is fixedly connected to the base 10. A reinforcing rod 19 is arranged between two adjacent vertical rods 18. The two ends of the reinforcing rod 19 are respectively connected to two vertical rods 18. The reinforcing rod 19 and the vertical rods 18 are neither perpendicular nor parallel. The structure of the movable door 2 itself is similar to that of the fixed side 9. It also includes a reinforcing rod 19 and a plurality of parallel vertical rods 18. The lower end of each vertical rod 18 of the movable door 2 is not fixedly connected to the base 10, but connected to the support plate 14. The bottom of the support plate 14 is connected to the caster 1, and the caster 1 is supported on the ground or a workbench. The caster 1 plays a role in supporting the movement of the movable door 2. Preferably, the caster 1 is detachably mounted on the support plate 14 by fasteners.
[0025] In this embodiment, for the movable door 2 , except for the vertical rod 18 closest to the rotating shaft 5 , the lower end of each of the other vertical rods 18 is respectively connected to a support plate 14 , and the bottom of each support plate 14 is connected to a caster 1 .
[0026] Based on the above structure, the movable door 2 is opened and closed by pushing the movable door 2. When the movable door 2 moves, the caster 1 rolls and supports and drives the movable door 2 to move. In order to locate the final position of the movable door 2 after closing, a limit block 11 is provided on the base 10. When the lower end of the movable door 2 contacts the limit block 11, the movable door 2 is closed in place. At this time, the movable door 2 and the fixed side 9 are spliced to form a cylindrical structure with an internal cavity. In other words, the fixed side 9 and the movable door 2 are respectively located on two arc surfaces with the same radius. When the movable door 2 is closed, the fixed side 9 and the movable door 2 are located on the side of the same cylinder.
[0027] In order to ensure that the movable door 2 and the fixed side 9 are relatively fixedly connected together after the movable door 2 is closed, a cross beam 4 is provided. The cross beam 4 is located at the hinge of the movable door 2 and the fixed side 9. Specifically, one end of the cross beam 4 is fixedly connected to the fixed side 9, and the other end is provided with a connecting wing. After the movable door 2 is closed, the connecting wing is opposite to a vertical rod 18 of the movable door 2 closest to the rotating shaft 5. The bolt is inserted into the vertical rod 18 after passing through the connecting wing, so as to achieve relative fixation of the movable door 2 and the fixed side 9.
[0028] In order not to interfere with the movement of the caster 1, the base 10 is provided with an arc-shaped caster groove 15 which is a groove, and the number of the caster groove 15 is the same as the number of the casters 1. After the movable door 2 is closed, each caster 1 is inserted into each caster groove 15 respectively.
[0029] Furthermore, in order to make the movable door 2 more stable after closing, the support plate 14 and the base 10 are fixedly connected together by bolts and other fasteners after the movable door 2 is closed. Specifically, the height of the base 10 is lower than the height of the caster 1, and the width of the support plate 14 is greater than the width of the caster groove 15. When the movable door 2 is closed, each caster 1 enters each caster groove 15 of the base 10, and then the movable door 2 is raised by means of a jack screw or a hydraulic jack, the caster 1 is removed, and then the movable door 2 is dropped so that each support plate 14 crosses each caster groove 15 and is supported on the base 10, and finally the support plate 14 is fixedly connected to the base 10 by fasteners.
[0030] Flange A 3 and flange B 7 are respectively connected to the top of the movable door 2 and the fixed side 9. Flange A 3 and flange B 7 are both arc-shaped plate structures. In other words, flange A 3 and flange B 7 are both fan-shaped. When the movable door 2 is closed, flange A 3 and flange B 7 are spliced to form a circular flange.
[0031] The flange armor 3 is connected to the movable door 2 through at least two connecting blocks 22 and a plurality of connecting bolts 23. Specifically, at least two connecting blocks 22 are arranged at intervals on the flange armor 3. The upper end of the connecting block 22 is fixedly connected to the lower end of the flange armor 3. The connecting block 22 and the vertical rod 18 are detachably connected together through the connecting bolts 23. The vertical rod 18 is provided with a waist-shaped hole. The connecting bolts 23 pass through the waist-shaped holes on the connecting block 22 and the vertical rod 18 and are locked by nuts. The position of the connecting bolts 23 on the waist-shaped hole is adjustable so that the flange armor 3 can be fixed at a desired position. Each connecting block 22 is connected to the vertical rod 18 through a plurality of connecting bolts 23.
[0032] The flange armor 3 is adjusted in level by at least two adjustment blocks and at least two horizontal adjustment bolts 8. Specifically, the adjustment block is fixedly connected to the upper end of the vertical rod 18 of the movable door 2. Preferably, each vertical rod 18 is provided with an adjustment block. Each adjustment block is provided with a horizontal adjustment bolt 8. The horizontal adjustment bolt 8 contacts the bottom of the flange armor 3 after passing through the adjustment block from bottom to top. The height of the upper end of the horizontal adjustment bolt 8 extending out of the adjustment block can be adjusted by rotating each horizontal adjustment bolt 8, thereby adjusting the level and height of the flange armor 3 in contact with it, so that the circular ring where the flange armor 3 is located is located in the horizontal plane. Preferably, the horizontal adjustment bolt 8 can be self-locking. After the horizontality of the flange armor 3 is adjusted by the horizontal adjustment bolt 8, the nut matched with the connecting bolt 23 is tightened to fix the connecting block 22 and the vertical rod 18, thereby fixing the flange armor 3. Preferably, the horizontal adjustment bolt 8 and the connecting block 22 on each vertical rod 18 are respectively located on both sides of the vertical rod 18.
[0033] Similarly, flange B 7 is also connected to the fixed side 9 through at least two connecting blocks 22 and multiple connecting bolts 23, and the horizontality can also be adjusted through the horizontal adjustment bolts 8 in contact therewith. The principle is the same as that of flange A 3 and will not be repeated here.
[0034] In this embodiment, each vertical rod 18 of the movable door 2 is connected to the flange A 3 via a connecting block 22 , and each vertical rod 18 of the fixed side 9 is connected to the flange B 7 via a connecting block 22 .
[0035] A plurality of centering adjustment bolts 6 are respectively arranged on the top of flange A 3 and flange B 7. The centering adjustment bolts 6 on flange A 3 are arranged at intervals along the circumference of flange A 3, and the centering adjustment bolts 6 on flange B 7 are arranged at intervals along the circumference of flange B 7. The centering adjustment bolts 6 are used to adjust the position of the upper flange 16 placed on flange A 3 and flange B 7. Specifically, for the centering adjustment bolts 6 on flange A 3, the length direction of the centering adjustment bolts 6 is parallel to the plane where flange A 3 is located. The centering adjustment bolts 6 are screwed on a fixed block, and the fixed block is fixed on the upper end surface of flange A 3. The centering adjustment bolts 6 pass through the fixed block and can adjust the length of the centering adjustment bolts 6 extending out of the fixed block by rotating the centering adjustment bolts 6. The structure and installation adjustment method of the centering adjustment bolts 6 on flange B 7 are the same as those of the centering adjustment bolts 6 on flange A 3, and will not be repeated here. The outer diameter of the upper flange 16 is larger than the inner diameter of the annular flange formed by the splicing of flange A 3 and flange B 7, and the outer diameter of the upper flange 16 is smaller than the outer diameter of the annular flange formed by the splicing of flange A 3 and flange B 7. In this way, the upper flange 16 can be supported on the annular flange formed by the splicing of flange A 3 and flange B 7. Preferably, the centering adjustment bolts 6 and the fixing block are close to the outer ring of flange A 3 or flange B 7 so as not to interfere with the upper flange 16, that is, all the centering adjustment bolts 6 are arranged around the upper flange 16. When the centering adjustment bolts 6 are rotated, the end of the centering adjustment bolts 6 extending out of the fixing block can contact and push the upper flange 16, so as to adjust the axial position of the upper flange 16.
[0036] The inclined washer 12 is used to support the lower end of the impeller 17 of the impeller core package 13 and adjust the position of the impeller 17. There are multiple inclined washer 12, and multiple inclined washer 12 are arranged at intervals along the circumference of the base 10. The inclined washer 12 includes a pad, a pad seat and a pad bolt. The pad seat is placed on the base 10, and the pad is slidably arranged on the pad seat. The two ends of the pad bolt are respectively connected to the pad and the pad seat. By adjusting the pad bolt, the pad is driven to slide, thereby driving the impeller 17 supported on the pad to move. The contact surface between the pad and the pad seat is an inclined surface, which is inclined downward in the direction close to the center of the base 10, that is, when the pad moves in the direction close to the center of the base 10, the top height of the pad is reduced, so that the horizontality of the shaft head 20 of the impeller core package 13 can be adjusted, so that the central axis of the impeller 17 is perpendicular to the horizontal plane, and the upper end surface of the shaft head 20 is parallel to the horizontal plane. Preferably, the pad moves in a radial direction of the base 10.
[0037] It should be noted that the pad bolt can drive the pad to slide in a variety of ways. For example, the pad is screwed onto the pad bolt, and the pad and the pad bolt form a screw slider mechanism. When the pad bolt rotates, the pad moves along the length direction of the pad bolt. For another example, one end of the pad bolt is fixedly connected to the pad, and the other end of the pad bolt passes through the partition on the pad seat and then is screwed onto the nut. Since the contact surface between the pad and the pad seat is an inclined surface, the pad has a tendency to move downward along the inclined surface, thereby applying force to the nut so that the nut is pressed against the partition. The position of the pad is adjusted by adjusting the position of the nut on the pad bolt.
[0038] Based on the above structure, the working principle and process of the present invention are as follows: the impeller core package 13 has components such as an upper flange 16, a shaft head 20, an upper bearing, a lower bearing, and an impeller 17. During maintenance, the above components of the impeller core package 13 need to be disassembled and tested separately. After the test, the problematic components are replaced and then reassembled. After assembly, the relative positions of the components need to be tested to ensure that the relative positions of the components are accurate.
[0039] During the inspection, the movable door 2 is opened, and the assembled impeller core package 13 is placed into the internal cavity of the bracket. First, the impeller core package 13 is temporarily stabilized by a traveling crane. Then, the movable door 2 is pushed and closed, and the movable door 2 is rotated relative to the fixed side 9 around the rotating shaft 5 by the rolling of the caster 1 until the movable door 2 contacts the limit block 11. At this time, the movable door 2 and the fixed side 9 are spliced into a cylindrical structure, and each caster 1 is inserted into each caster groove 15. Then, the corresponding fastener is inserted into the vertical rod 18 of the movable door 2 after passing through the crossbeam 4, and the movable door 2 is lifted up, and the caster 1 is removed, so that the movable door 2 falls to each support plate 14, which crosses each caster groove 15 and is supported on the base 10, and the support plate 14 and the base 10 are fastened together. Next, the impeller core package 13 is dropped by a traveling crane, and the lower end of the impeller 17 will be supported on the pads of each inclined pad iron 12, and the upper flange 16 will be supported on the annular flange formed by the splicing of flange A 3 and flange B 7. The position of the pad is adjusted by adjusting the pad bolt of the inclined pad 12, thereby adjusting the horizontality of the shaft head 20 of the impeller core package 13, so that the central axis of the lower end of the impeller 17 is perpendicular to the horizontal plane, and the horizontality of the annular flange is adjusted by rotating the horizontal adjustment bolt 8, so that the central axis of the annular flange and the upper flange 16 supported on the annular flange are perpendicular to the horizontal plane, and the upper flange 16 is adjusted by adjusting the centering adjustment bolt 6, so that the upper flange 16 is translated in the horizontal plane until the central axis of the upper flange 16 coincides with the central axis of the impeller 17, that is, the upper bearing and the lower bearing are aligned.
[0040] In this embodiment, the horizontality of flange A 3 and flange B 7 is adjusted to no more than 0.05 mm / m by the horizontal adjustment bolt 8; the horizontality of the lower end 17 of the impeller is adjusted to no more than 0.05 mm / m by the inclined washer 12; the concentricity of the upper flange 16 and the impeller 17 is adjusted by the centering adjustment bolt 6, and the deviation of the center axis of the upper flange 16 and the impeller 17 is no more than 0.10 mm.
[0041] Finally, it is necessary to explain here that the above embodiments are only used to further illustrate the technical solution of the present invention in detail and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by technicians in this field based on the above content of the present invention all fall within the scope of protection of the present invention.
Claims
1. A large vertical volute pump maintenance bracket, characterized in that: The invention comprises a movable door (2), a flange A (3), a flange B (7), a fixed side (9), a base (10) and a plurality of inclined washers (12). The base (10) is supported on the ground or a workbench. The fixed side (9) is fixedly mounted on the base (10). The movable door (2) can rotate relative to the fixed side (9). The movable door (2) serves as a door. When the movable door (2) is closed, the movable door (2) and the fixed side (9) form a cylindrical structure with an internal cavity. The internal cavity can accommodate an impeller core package (13). The flange A (3) and the flange B (7) are respectively connected to the top of the movable door (2) and the fixed side (9). The flange A (3) and the flange B (7) are both arc-shaped plate structures. When the movable door (2) is closed, the flange A (3) and the flange B (7) are spliced to form a circular flange mounted on the base (10). ) are located on the same ring, the impeller core package (13) comprises an upper flange (16), an impeller (17), and a shaft head (20), the impeller core package (13) is supported on the bracket through the upper flange (16) and the lower end of the impeller (17), the impeller (17) is supported on the plurality of inclined washers (12), the inclined washers (12) drive the impeller (17) to move to adjust the horizontality of the shaft head (20) connected to the impeller (17), the upper flange (16) is supported on flange A (3) and flange B (7), the horizontality of flange A (3) and flange B (7) is adjustable, flange A (3) and flange B (7) are both provided with centering adjustment bolts (6) for adjusting the position of the central axis of the upper flange (16), and the impeller core package (13) as a whole enters the internal cavity through the opened movable door (2).
2. The bracket according to claim 1, characterized in that: The flange A (3) is connected to the movable door (2) through at least two connecting blocks (22) and a plurality of connecting bolts (23). At least two connecting blocks (22) are arranged on the flange A (3) at intervals. The upper end of the connecting block (22) is fixedly connected to the lower end of the flange A (3). The connecting block (22) and the movable door (2) are detachably connected together through the connecting bolts (23). The movable door (2) is provided with a waist-shaped hole. The connecting bolts (23) pass through the waist-shaped holes on the connecting block (22) and the movable door (2) and are then locked by nuts. The position of the connecting bolts (23) on the waist-shaped hole is adjustable so that the height of the flange A (3) is adjustable. The flange B (7) is connected to the fixed side (9) through at least two connecting blocks (22) and a plurality of connecting bolts (23).
3. The bracket according to claim 2, characterized in that: The flange A (3) is adjusted in level by at least two adjustment blocks and at least two horizontal adjustment bolts (8). The adjustment blocks are fixedly connected to the upper end of the movable door (2). Each adjustment block is provided with a horizontal adjustment bolt (8). The horizontal adjustment bolt (8) contacts the bottom of the flange A (3) after passing through the adjustment block from bottom to top. The height of the upper end of the horizontal adjustment bolt (8) extending out of the adjustment block can be adjusted by rotating each horizontal adjustment bolt (8), thereby adjusting the level and height of the flange A (3) in contact therewith. After the level of the flange A (3) is adjusted by the horizontal adjustment bolt (8), the nut matched with the connecting bolt (23) is tightened. The flange B (7) is adjusted in level by at least two adjustment blocks and at least two horizontal adjustment bolts (8). The adjustment block for adjusting the flange B (7) is fixed to the upper end of the fixed side (9).
4. The bracket according to claim 1, characterized in that: A plurality of centering adjustment bolts (6) are respectively arranged at the top of flange A (3) and flange B (7). The centering adjustment bolts (6) on flange A (3) are arranged at intervals along the circumference of flange A (3), and the centering adjustment bolts (6) on flange B (7) are arranged at intervals along the circumference of flange B (7). All the centering adjustment bolts (6) are arranged around the upper flange (16). When the centering adjustment bolts (6) are rotated, one end of the centering adjustment bolts (6) can contact and push the upper flange (16).
5. The bracket according to claim 1, characterized in that: The inclined washer (12) comprises a washer block, a washer block seat and a washer block bolt. The washer block seat is placed on the base (10). The washer block is slidably arranged on the washer block seat. The contact surface between the washer block and the washer block seat is an inclined surface. The two ends of the washer block bolt are respectively connected to the washer block and the washer block seat. By adjusting the washer block bolt, the washer block is driven to slide, thereby driving the impeller (17) of the impeller core package (13) supported on the washer block to move.
6. The bracket according to claim 1, characterized in that: The bottom of the movable door (2) is connected to a support plate (14), the bottom of the support plate (14) is detachably connected to a caster (1), the caster (1) is supported on the ground or a workbench, a base (10) is provided with an arc-shaped caster groove (15) for the caster (1) to be inserted, the height of the base (10) is lower than the height of the caster (1), the width of the support plate (14) is larger than the width of the caster groove (15), when the movable door (2) is closed, the caster (1) enters the caster groove (15), after the caster (1) is removed, the movable door (2) can fall to the support plate (14) across the caster groove (15) and be supported on the base (10).
7. The bracket according to claim 6, characterized in that: At least two casters (1) are provided, the number of caster grooves (15) is the same as the number of casters (1), each caster (1) is connected to a support plate (14), and when the movable door (2) is closed, each support plate (14) is respectively arranged on top of each caster groove (15).
8. The bracket according to claim 1, characterized in that: A limiting block (11) for limiting the position of the movable door (2) is provided on the base (10); when the movable door (2) contacts the limiting block (11), the movable door (2) is closed in place.
9. The bracket according to claim 1, characterized in that: The movable door (2) and the fixed side (9) are hinged together via a rotating shaft (5), and the movable door (2) can rotate relative to the fixed side (9) around the rotating shaft (5).
10. The bracket according to any one of claims 1 to 9, characterized in that: The fixed side (9) and the movable door (2) are both frame structures.