Hoisting type cutting device based on volute seat ring of pumped storage power station

Abstract

The hoisting type cutting device based on the volute seat ring of the pumped storage power station comprises an operation platform located on the top of the volute seat ring, the periphery of the operation platform is fixedly connected with an external machine base, and a plurality of positioning mechanisms are annularly distributed on the periphery of the bottom of the operation platform. A measuring mechanism for horizontally positioning the cutting device is arranged on the inner side of the positioning mechanism; the positioning mechanism comprises a mounting frame fixedly connected to the bottom of the operation platform, a positioning frame is connected to the mounting frame through a lead screw transmission structure, the end of the positioning frame extends to the outer side of the mounting frame and is connected with a limiting block, and the limiting block is used for limiting the cutting device. According to the utility model, the installation difficulty of the cutting device can be reduced, and the positioning precision of the cutting device is improved.

Description

Technical Field

[0001] The utility model relates to an auxiliary processing device for a volute seat ring, in particular to a hoisting type cutting device based on a volute seat ring of a pumped storage power station. Background Art

[0002] The volute seat ring is a crucial component of the water guide mechanism in a pumped-storage power station. The turbine's bottom ring, top cover, water guide bearing, and guide vanes all rely on the seat ring for horizontal and vertical alignment, directly affecting the guide vane end clearance. This necessitates relatively high machining precision for the volute seat ring, which must be controlled within a tolerance of 0.15mm. Excessive deviation can lead to significant coaxial deviations in the unit, and in severe cases, can even prevent the turbine and generator components from assembling properly.

[0003] On this basis, manufacturers currently use various measuring sensors to measure the horizontality and roundness of the cutting surface of the volute seat ring when using a cutting device to cut the volute seat ring, thereby ensuring its processing accuracy. However, since these measuring sensors are all measured based on the cutting device, once the cutting device has concentricity and verticality problems, it will cause deviations in its processing and measurement benchmarks, thereby seriously affecting its processing accuracy and stability. Even if the cutting device is found to have deviations at a later stage, it is difficult for operators to recalibrate the cutting device during the cutting process. This requires that the accuracy of the cutting device's installation position must be ensured during the initial installation process.

[0004] The conventional installation method for the cutting device is to first hoist it into the middle cavity of the volute seat ring through a crane, and then fix it to the installation surface at the bottom of the cavity through the base. However, on the one hand, since its bottom installation surface is not cast based on the volute seat ring, the horizontality of its bottom installation surface does not meet the positioning requirements of the cutting device, that is, the operator is required to level the base according to the installation position of the cutting device during the installation process; on the other hand, since the cutting device does not directly contact the volute seat ring during the installation process, the operator cannot directly use the inner ring of the volute seat ring as the concentricity positioning reference of the cutting device. In addition, due to the limitations of the lifting process, the translation distance of the cutting device is also difficult to accurately control. Whether it is controlled by a crane or manually pulled, there is a large movement deviation. Under the above limitations, the current positioning method of the cutting device is very difficult and has a large randomness. The operator needs to constantly test and adjust to make the lifting position of the cutting device close to its error range.

[0005] Therefore, the existing hoisting and positioning method for the volute seat ring cutting device has the problems of difficult operation and low positioning accuracy. Utility Model Content

[0006] The purpose of the utility model is to provide a hoisting cutting device based on a volute seat ring of a pumped storage power station, which can reduce the difficulty of installing the cutting device and improve the positioning accuracy of the cutting device.

[0007] The technical solution of the present utility model is as follows: a hoisting cutting device based on the volute seat ring of a pumped-storage power station, comprising an operating platform located at the top of the volute seat ring, the operating platform being fixedly connected to an external machine base on all four sides, a plurality of positioning mechanisms being distributed in a ring shape around the bottom of the operating platform, a measuring mechanism for horizontally positioning the cutting device being provided on the inner side of the positioning mechanism; the positioning mechanism comprising a mounting frame fixedly connected to the bottom of the operating platform, a positioning frame being connected to the mounting frame via a screw transmission structure, an end of the positioning frame extending to the outside of the mounting frame and connected to a limiting block, the limiting block being used to limit the cutting device.

[0008] In the aforementioned hoisting cutting device based on the volute seat ring of a pumped-storage power station, the measuring mechanism includes two separate kits, which are mounted on the outside of the cutting device and are detachably connected. An annular slide groove is formed on the top of the two kits, and an arc plate is snap-connected in the slide groove. A distance sensor is detachably connected to the arc plate. The arc plate is used for the distance sensor to rotate along the axis of the cutting device, and the distance sensor is used to detect the concentricity between the cutting device and the volute seat ring as the arc plate rotates.

[0009] In the aforementioned hoisting cutting device based on the volute seat ring of a pumped-storage power station, the screw transmission structure includes a screw rotatably connected to the mounting frame, the end of the screw is connected to a handwheel, and symmetrical guide rods are provided on both sides of the screw. The middle part of the positioning frame is connected to the screw via a screw nut, and the two sides of the positioning frame are slidably connected to the guide rods.

[0010] In the aforementioned hoisting cutting device based on the volute seat ring of a pumped-storage power station, the inner side of the limit block is connected to the positioning frame via a rotating shaft, and the outer side of the limit block is slidably connected to an L-shaped plug plate. The top of the plug plate forms an adjustment surface for horizontal positioning, and the outer side of the limit block forms a fitting surface for limiting.

[0011] In the aforementioned hoisting cutting device based on the volute seat ring of a pumped-storage power station, a spirit level is provided on the top of the positioning frame, one side of the spirit level is rotatably connected to the mounting frame, and a mounting hole is formed on the other side of the spirit level. An adjusting screw is provided in the mounting hole, and the end of the adjusting screw is threadedly connected to the mounting frame. The middle part of the adjusting screw is provided with adjusting nuts located on the upper and lower sides of the spirit level respectively, and the end of the spirit level extends to the outside of the mounting hole and is used to fit the adjustment surface.

[0012] In the aforementioned hoisting cutting device based on the volute seat ring of a pumped storage power station, the distance sensor is a laser rangefinder with a light spot indication function. The distance sensor is connected to the arc plate by rotating in the vertical direction, and the plug plate is provided with a measuring point that cooperates with the distance sensor.

[0013] In the aforementioned hoisting cutting device based on the volute seat ring of a pumped-storage power station, the operating platform is made of profiles, a ring-shaped first operating area is formed in the middle of the operating platform, and several long second operating areas are distributed around the operating platform. The positioning mechanism is located at the bottom of the second operating area; the first operating area and the second operating area are respectively detachably connected with a first pedal and a second pedal, and the second pedal is provided with a cover for the operator to install and remove.

[0014] Compared with the prior art, the present invention has the following features:

[0015] (1) The present invention uses the structural coordination of the measuring mechanism and the positioning mechanism to enable the operator to adjust the horizontal position of each limit block according to the concentricity measurement data of the cutting device, and then use the limit blocks to limit the verticality and horizontal position of the cutting device, so that the cutting device can be quickly positioned by fitting the limit blocks in the hoisting state, thereby effectively improving its positioning accuracy and facilitating the operator's operation;

[0016] (2) By defining the structure of the measuring mechanism, the operator can first fix the kit on the outside of the cutting device, and then detect the spacing between the cutting device and the inner ring of the volute seat ring by rotating the arc plate, thereby obtaining the concentricity position relationship of the cutting device relative to the volute seat ring, thereby realizing its detection function and facilitating the operator's operation;

[0017] (3) By limiting the structure of the positioning mechanism, after the operating platform is installed, the operator can first adjust the rotation angle of the limit block on the positioning frame according to the horizontality of the adjustment surface, and then quickly locate the horizontality of the level ruler based on the adjustment surface; thereby, the verticality and displacement accuracy of the limit block can be independent of the installation position of the operating platform, that is, the positioning accuracy of the limit block is effectively improved; on this basis, through the structural coordination of the level ruler, the positioning frame and the measuring mechanism, the operator can establish a rectangular coordinate system based on each limit block, and calculate the translation distance of each limit block based on the measurement results of the distance sensor, thereby further improving the detection and installation efficiency of the cutting device;

[0018] Therefore, the utility model can reduce the difficulty of installing the cutting device and improve the positioning accuracy of the cutting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 yes Figure 1 A-direction enlarged view;

[0021] Figure 3 yes Figure 1 B-direction enlarged view;

[0022] Figure 4 yes Figure 1 C-direction view.

[0023] The marks in the accompanying drawings are: 1-operating platform, 2-mounting frame, 3-positioning frame, 4-limiting block, 5-kit, 6-slide groove, 7-arc plate, 8-distance sensor, 9-rotating shaft, 10-insertion plate, 11-level ruler, 12-adjusting screw, 13-first operating area, 14-second operating area, 101-adjusting surface, 402-fitting surface. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0025] Embodiment. A hoisting cutting device based on the volute seat ring of a pumped storage power station is composed of Figure 1 As shown, it includes an operating platform 1 located at the top of the volute seat ring, the operating platform 1 is fixedly connected to the external machine base on all sides, and a number of positioning mechanisms are distributed in a ring around the bottom of the operating platform 1. A measuring mechanism for horizontally positioning the cutting device is provided on the inner side of the positioning mechanism; the positioning mechanism includes a mounting frame 2 fixedly connected to the bottom of the operating platform 1, and a positioning frame 3 is connected to the mounting frame 2 via a screw transmission structure. The end of the positioning frame 3 extends to the outside of the mounting frame 2 and is connected to a limit block 4, which is used to limit the cutting device.

[0026] The measuring mechanism includes two split kits 5, which are sleeved on the outside of the cutting device and bolted at both ends. An annular slide groove 6 is formed on the top of the two kits 5, and an arc plate 7 is snap-connected in the slide groove 6. A distance sensor 8 is detachably connected to the arc plate 7. The arc plate 7 is used for the distance sensor 8 to rotate along the axis of the cutting device. The distance sensor 8 is used to detect the concentricity between the cutting device and the volute seat ring as the arc plate 7 rotates.

[0027] The screw transmission structure includes a screw that is rotatably connected to the mounting frame 2, the end of the screw is connected to a handwheel, and symmetrical guide rods are provided on both sides of the screw. The middle part of the positioning frame 3 is connected to the screw via a screw nut, and the two sides of the positioning frame 3 are slidably connected to the guide rods.

[0028] The inner side of the limit block 4 is rotatably connected to the positioning frame 3 via the rotating shaft 9, the rotating shaft 9 and the limit block 4 are key-connected, the external thread of the rotating shaft 9 is connected with a round nut, and the round nut is used to limit the rotation of the rotating shaft 9 after tightening, and the external side of the limit block 4 is slidably connected with an L-shaped plug plate 10 via a T-shaped slide groove. The top of the plug plate 10 forms an adjustment surface 101 for horizontal positioning, and the outer side of the limit block 4 forms a fitting surface 402 for limiting, and the sliding direction of the plug plate 10 is arranged parallel to the fitting surface 402.

[0029] A spirit level 11 is provided on the top of the positioning frame 3. One side of the spirit level 11 is rotatably connected to the mounting frame 2. A mounting hole is formed on the other side of the spirit level 11. An adjusting screw 12 is provided in the mounting hole. The end of the adjusting screw 12 is threadedly connected to the mounting frame 2. The middle of the adjusting screw 12 is provided with adjusting nuts located on the upper and lower sides of the spirit level 11 respectively. The end of the spirit level 11 extends to the outside of the mounting hole and is used to fit the adjustment surface 101.

[0030] The distance sensor 8 is a laser rangefinder with a light spot indication function. The distance sensor 8 is connected to the arc plate 7 by rotating in the vertical direction. The distance sensor 8 is in a horizontal state when it is in a low position and in an inclined upward state when it is in a high position. A measuring point that cooperates with the distance sensor 8 is provided on the plugboard 10.

[0031] The operating platform 1 is made of profiles, and is connected to guardrails on all sides. A ring-shaped first operating area 13 is formed in the middle of the operating platform 1, and several long second operating areas 14 are distributed around the operating platform 1. The positioning mechanism is located at the bottom of the second operating area 14; the first operating area 13 and the second operating area 14 are respectively detachably connected to the first pedal and the second pedal, and the second pedal is provided with a cover for the operator to install and remove; the middle of the operating platform 1 is fixedly connected to the cutting device via a connecting seat, and the connecting seat is installed after the cutting device is positioned.

[0032] The installation method of the hanging type cutting device comprises the following steps:

[0033] ① Use a crane to hoist the cutting device into the middle cavity of the volute seat ring, and install a base for supporting the cutting device at the bottom of the cavity;

[0034] ② Install the operating platform 1 above the cutting device, weld the four sides of the operating platform 1 to the external machine base, and then lay the second pedal on the operating platform 1 to leave space for operators to step on and operate. Leave the first pedal and cover plate unlaid for now, so that the crane can pass through the operating platform 1 to lift the cutting device and move it;

[0035] After the operating platform 1 is installed, the operator calibrates each positioning mechanism separately; that is, first, the limit block 4 is rotated and positioned by the cooperation of the level meter and the inserting plate 10, so that the contact surface 402 remains in a vertical state after positioning and is tightened; then the inserting plate 10 is slid until it contacts the level ruler 11, and the level ruler 11 is rotated according to the cooperation between the adjustment surface 101 and the adjustment nut, so that the level ruler 11 is in a horizontal state after being rotated into place;

[0036] ③ Two sets 5 are mounted on the pillars in the middle of the cutting device and connected by bolts. Then the arc plate 7 with the distance sensor 8 is buckled into the slide groove 6 at the top of the set 5, so that the arc plate 7 can slide along the slide groove 6, and the height of the distance sensor 8 is consistent with the inner ring of the volute seat ring;

[0037] After the arc plate 7 is installed, the operator turns on the distance sensor 8 and rotates the arc plate 7 so that the distance sensor 8 faces each plug plate 10, and then detects the distance of the volute seat ring below the plug plate 10 in turn, thereby obtaining the offset size of the cutting device relative to the volute seat ring; after the measurement is completed, the operator turns the hand wheel to adjust the axial position of the limit block 4 according to the offset distance of the cutting device, so that it can intercept and position the cutting device after it is in place;

[0038] ④ Move the cutting device horizontally toward the limit block 4 in the hoisting state, so that the cutting device fits tightly with the limit block 4 on one side after hoisting; when the cutting device is completely in contact with the limit block 4, it means that the cutting device has reached the concentric position, and then the operator controls the translation of the remaining limit blocks 4 so that each limit block 4 can squeeze the side wall of the cutting device from all sides, that is, prevent the cutting device from deviating again during subsequent installation;

[0039] ⑤ Fine-tune the base according to the horizontal position of the cutting device, then use the crane to place the cutting device on the base in the limited state, and level the base according to the bottom installation surface of the cutting device. Then fix the lower end of the cutting device to the base, and use the operating platform 1 to fix the upper end of the cutting device. Finally, lay the first pedal and cover plate to complete the installation.

[0040] The utility model coordinates the structures of the operating platform 1, the positioning mechanism and the measuring mechanism, so that the inner ring of the volute seat ring is used as the basic surface to position the installation position of the cutting device, and then uses the positioning mechanism to hard limit the cutting device, so that the cutting device can be quickly moved to the positioning position and complete subsequent installation operations in the limited state, thereby effectively improving the installation efficiency and positioning accuracy of the cutting device and avoiding the cutting device from being offset again after positioning.

Claims

1. A hoisting cutting device based on the volute seat ring of a pumped storage power station, characterized by: The invention comprises an operating platform (1) located at the top of the volute seat ring, the operating platform (1) is fixedly connected to an external machine base around its periphery, a plurality of positioning mechanisms are distributed in a ring shape around the bottom of the operating platform (1), and a measuring mechanism for horizontally positioning a cutting device is provided on the inner side of the positioning mechanism; the positioning mechanism comprises a mounting frame (2) fixedly connected to the bottom of the operating platform (1), a positioning frame (3) is connected to the mounting frame (2) via a screw transmission structure, an end of the positioning frame (3) extends to the outside of the mounting frame (2) and is connected to a limiting block (4), and the limiting block (4) is used to limit the cutting device.

2. The hoisting cutting device based on the volute seat ring of a pumped storage power station according to claim 1 is characterized in that: The measuring mechanism comprises two separate sets (5), the two sets (5) are sleeved on the outside of the cutting device and are detachably connected, an annular slide groove (6) is formed on the top of the two sets (5), an arc plate (7) is buckled and connected in the slide groove (6), and a distance sensor (8) is detachably connected to the arc plate (7), the arc plate (7) is used for the distance sensor (8) to rotate along the axis of the cutting device, and the distance sensor (8) is used to detect the concentricity between the cutting device and the volute seat ring as the arc plate (7) rotates.

3. The hoisting cutting device based on the volute seat ring of a pumped storage power station according to claim 1, characterized in that: The screw transmission structure includes a screw that is rotatably connected to the mounting frame (2), the end of the screw is connected to a handwheel, and symmetrical guide rods are provided on both sides of the screw. The middle of the positioning frame (3) is connected to the screw via a screw nut, and the two sides of the positioning frame (3) are slidably connected to the guide rods.

4. The hoisting cutting device based on the volute seat ring of a pumped storage power station according to claim 2, characterized in that: The inner side of the limit block (4) is rotatably connected to the positioning frame (3) via a rotating shaft (9); the outer side of the limit block (4) is slidably connected to an L-shaped inserting plate (10); the top of the inserting plate (10) forms an adjustment surface (101) for horizontal positioning; and the outer side of the limit block (4) forms a fitting surface (402) for limiting.

5. The hoisting cutting device based on the volute seat ring of a pumped storage power station according to claim 4 is characterized in that: A level ruler (11) is provided on the top of the positioning frame (3), one side of the level ruler (11) is rotatably connected to the mounting frame (2), and a mounting hole is formed on the other side of the level ruler (11), an adjusting screw (12) is provided in the mounting hole, the end of the adjusting screw (12) is threadedly connected to the mounting frame (2), and an adjusting nut is provided in the middle of the adjusting screw (12), which is respectively located on the upper and lower sides of the level ruler (11), and the end of the level ruler (11) extends to the outside of the mounting hole and is used to fit the adjustment surface (101).

6. The hoisting cutting device based on the volute seat ring of a pumped storage power station according to claim 4, characterized in that: The distance sensor (8) is a laser rangefinder with a light spot indication function. The distance sensor (8) is connected to the arc plate (7) in a vertical rotation direction. The plug plate (10) is provided with a measuring point that matches the distance sensor (8).

7. The hoisting cutting device based on the volute seat ring of a pumped storage power station according to claim 1, characterized in that: The operating platform (1) is formed by splicing profiles, and a first annular operating area (13) is formed in the middle of the operating platform (1). A plurality of second long strip operating areas (14) are distributed around the operating platform (1), and the positioning mechanism is located at the bottom of the second operating area (14); the first operating area (13) and the second operating area (14) are respectively detachably connected with a first pedal and a second pedal, and the second pedal is provided with a cover for an operator to install and remove.

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