A method for welding and positioning blades in rows and a device for welding and positioning blades

Abstract

The present invention provides a welding positioning device for rowed blades and a method for welding and positioning blades, including a welding positioning device for blades. The welding positioning device for blades includes a polygonal frame and at least two blade positioning strip plates, and the blade positioning strip plates are horizontally and parallelly installed in the polygonal frame. The method for welding and positioning blades is to fix the blades through a row of inclined plates, fix the whole blades on the blade positioning strip plates, and through the positioning installation of the blade positioning strip plates and the polygonal frame, the polygonal frame is fixedly installed with an elliptical cylinder body. The beneficial effects of the present invention are: realizing the welding and positioning of the whole row of blades, preventing deformation, improving the product manufacturing efficiency by rowed positioning, having a simple design structure, reasonable layout, and low manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the technical field of blade welding and positioning, and particularly relates to a device for welding and positioning rowed blades and a method for welding and positioning blades. Background Art

[0002] With the continuous increase in social and enterprise electricity consumption, China's power industry and power technology have also been correspondingly developed and improved, and the development of the power industry has been strengthened in various aspects. In particular, the use of boilers is to ensure the safe and sufficient production of electricity. In the operation of boilers, induced draft fans are key elements, and the operation of induced draft fans requires the rotation of blades. Therefore, the welding and positioning of blades are particularly important.

[0003] Since boilers are large-scale equipment, there are many inconveniences in the operation during the welding and positioning of blades, and the requirement for installation accuracy is high. The existing welding and positioning of blades are all individually positioned. This positioning method has low efficiency and cannot achieve overall installation, which is not conducive to being applied in actual production. The symmetry of rowed blades during positioning is low, the installation is irregular, and consistency cannot be maintained. Summary of the Invention

[0004] To overcome the above problems existing in the prior art, the present invention provides a device for welding and positioning rowed blades and a method for welding and positioning blades.

[0005] The present invention discloses a device for welding and positioning rowed blades, including a blade welding and positioning device, an elliptical cylinder, blades, and a central inclined cylinder. The central inclined cylinder passes through the center point of the elliptical cylinder at an inclination of 20 to 80 degrees. The blades are installed in rows in the elliptical cylinder to complete the basic installation of the blades. The blade welding and positioning device includes a polygonal frame, at least two blade positioning strip plates, and a central inclined cylinder backing plate. The blade positioning strip plates are horizontally installed in parallel in the polygonal frame. The blades are positioned by the blade positioning strip plates, and the installation of the blades and the polygonal frame is realized through the blade positioning strip plates. The polygonal frame is placed below the elliptical cylinder, and the positioning installation of the blades and the elliptical cylinder is realized through the blade welding and positioning device. The central inclined cylinder backing plate is installed on the left side of the polygonal frame and is connected to the central inclined cylinder. The inclination direction of the central inclined cylinder is fixed through the central inclined cylinder backing plate to ensure the stability of the installation between the blade welding and positioning device and the blade basic structure. Channels are installed between adjacent blade positioning strip plates to connect and fix adjacent blade positioning strip plates.

[0006] On this basis, the elliptical cylinder has a cylinder body length of 8 to 9 meters, a cylinder body width of 6 to 7 meters, and a cylinder body height of 0.5 to 1 meter. The blades are in the shape of a crescent. The blades on the left side of the central inclined cylinder are installed as a whole. Due to the inclined installation of the central inclined cylinder, the remaining blades are symmetrically installed on both sides of the central inclined cylinder with the horizontal center line of the polygonal frame as the axis of symmetry. The length range of the blades is 1 to 6 meters, ensuring that the length of the blades can match the size of the cylinder body during overall installation and symmetrical installation.

[0007] On this basis, the polygonal frame is divided into upper and lower pentagonal steel plates with the horizontal center line as the dividing line. At least two I-beams and end plates are installed on the pentagonal steel plates. The end plates are installed at both ends of the pentagonal steel plates through at least two groups of cooperating first bolts and first nuts. The polygonal frame adopts a split connection. By symmetrically arranging the pentagonal steel plates and installing end plates at both ends, and fixing and combining the ports through the first bolts and first nuts to form an octagonal frame, operating on a single-sided pentagonal steel plate is more convenient than overall installation operation.

[0008] On this basis, the blade positioning strip plate includes an H-shaped steel, trapezoidal stiffeners, and at least two inclined plates. The H-shaped steel is horizontally fixed on the polygonal frame. The trapezoidal stiffeners are installed at the bottom of the H-shaped steel. The inclined plates are fixed in rows on the H-shaped steel. The blade positioning strip plate is integrally fixed to the polygonal frame through the H-shaped steel.

[0009] On this basis, the inclined plate includes a positioning plate, a bottom plate, and two side stiffeners. The positioning plate is installed above the bottom plate. The side stiffeners are installed on both sides of the positioning plate. The bottom plate is fixed to the H-shaped steel through a conical pin, a second bolt, and a second nut at the bottom. Lifting holes are provided on the inclined plates for hoisting and welding positioning devices.

[0010] On this basis, the center line is marked on the blade positioning strip plate. The center line on the blade positioning strip plate coincides with the longitudinal center line in the polygonal frame. The center line on the blade positioning strip plate is mirror-symmetrically installed with the horizontal center line in the polygonal frame. By respectively corresponding the center line on the blade positioning strip plate to the two center lines of the polygonal frame, the corresponding installation positions of the blade positioning strip plate and the polygonal frame are determined, ensuring the accuracy of the positioning of the blade positioning strip plate and the polygonal frame.

[0011] On this basis, the distance between adjacent inclined plates is 0 to 2 mm larger than the distance between adjacent blades, leaving a gap during installation to ensure that the blades can be installed in the middle position between two inclined plates.

[0012] On this basis, the inclination angle of the reclining plate with respect to the horizontal direction is the same as the inclination angle of the line connecting the two sharp corners at both ends of the blade with respect to the horizontal direction. Keeping the inclination angles consistent ensures the installation accuracy and positioning accuracy.

[0013] On this basis, the central inclined cylinder backing plate includes an arc plate, an L-shaped support plate, and a steel plate. The L-shaped support plate is installed above the steel plate, and the arc plate is installed above the L-shaped support plate. The steel plate is fixed on the polygonal frame to fix the central inclined cylinder backing plate to the polygonal frame.

[0014] On this basis, the arc size of the arc plate in the central inclined cylinder backing plate is the same as the outer diameter size of the central inclined cylinder body. By matching the arc plate with the central inclined cylinder body, it plays a supporting role, thereby fixing the inclination angle of the central inclined cylinder body and improving the stability during the inclined installation of the central inclined cylinder body.

[0015] On this basis, the major axis and minor axis of the elliptical cylinder body coincide with the horizontal center line and vertical center line of the polygonal frame respectively. By the coincidence of the axis of the elliptical cylinder body and the center line of the polygonal frame, the installation position is determined, the accuracy during installation is improved, and thus the positioning accuracy is enhanced.

[0016] A method for welding and positioning blades using the blade welding and positioning device includes the following steps:

[0017] Step 1: The blade positioning strip plates are welded horizontally and parallel to each other in the polygonal frame. The center line marked on the blade positioning strip plate coincides with the vertical center line in the polygonal frame, and the center line marked on the blade positioning strip plate is symmetrically installed with respect to the horizontal center line in the polygonal frame in a mirror image manner. By the respective correspondence of the center line with the two center lines of the polygonal frame, the corresponding installation position of the blade positioning strip plate and the polygonal frame is determined.

[0018] Step 2: Place the polygonal frame below the elliptical cylinder body. The major axis and minor axis of the elliptical cylinder body coincide with the horizontal and vertical center lines of the polygonal frame respectively to achieve the installation and positioning of the polygonal frame and the elliptical cylinder body.

[0019] Step 3: The reclining plate is fixed to the H-shaped steel through conical pins, second bolts, and second nuts. The H-shaped steel is fixed horizontally on the polygonal frame to fix the blade positioning strip plate and the polygonal frame.

[0020] Step 4: Insert the blades between the two reclining plates. The inclination angle of the reclining plate with respect to the horizontal direction is the same as the inclination angle of the line connecting the two sharp corners at both ends of the blade with respect to the horizontal direction. By the reclining plate, the installation position and installation angle between the row of blades and the blade positioning strip plate are fixed, thereby achieving the positioning installation of the blades and the polygonal frame.

[0021] Step 5: The central inclined cylinder passes through the center point of the elliptical cylinder at an inclination angle of 20 to 80 degrees. The arc dimension of the arc plate in the central inclined cylinder support plate is the same as the outer diameter dimension of the central inclined cylinder body, which plays a supporting role, thereby fixing the inclination angle of the central inclined cylinder body, and thus realizing the positioning and installation of the whole row of blades.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: The whole row of blades is fixed by the row of inclined support plates, so that the inclination angles of the blades are consistent and the distances between the blades are the same. The whole row of blades is fixed on the blade positioning strip plate. Through the positioning and installation of the blade positioning strip plate and the polygonal frame, and the fixed installation of the polygonal frame and other devices, the positioning and welding of the whole row of blades are realized, preventing deformation. The row positioning improves the product manufacturing efficiency, the design structure is simple, the layout is reasonable, and the manufacturing cost is low. Description of the Drawings

[0023] Figure 1 is the front view of the welding parts of the elliptical cylinder and the whole row of blades of the present invention;

[0024] Figure 2 is the top view of the welding parts of the elliptical cylinder and the whole row of blades of the present invention;

[0025] Figure 3 is the partial enlarged view of the welding parts of the elliptical cylinder and the whole row of blades of the present invention;

[0026] Figure 4 is the top view of the welding positioning device for the whole row of blades of the present invention;

[0027] Figure 5 is the front view of the welding positioning device for the whole row of blades of the present invention;

[0028] Figure 6 is the front view of the polygonal frame of the present invention;

[0029] Figure 7 is the top view of the polygonal frame of the present invention;

[0030] Figure 8 is the front view of the blade positioning strip plate of the present invention;

[0031] Figure 9 is the top view of the blade positioning strip plate of the present invention;

[0032] Figure 10 is the partial enlarged view of the parts in the blade positioning strip plate of the present invention;

[0033] Figure 11 is the front view of the central inclined cylinder support plate of the present invention;

[0034] Figure 12 is the top view of the central inclined cylinder support plate of the present invention;

[0035] Figure 13 It is a top view of the blade and fan installation structure.

[0036] In the figure: 0-1, elliptical cylinder; 0-2, blade; 0-3, central inclined cylinder; 1, polygonal frame; 1-1, pentagonal steel plate; 1-2, I-beam; 1-3, end plate; 1-4, first bolt; 1-5, first nut; 2, blade positioning strip plate; 2-1, H-shaped steel; 2-2, trapezoidal stiffener; 2-3, leaning plate; 2-4, taper pin; 2-5, second bolt; 2-6, second nut; 2-3-1, positioning plate; 2-3-2, bottom plate; 2-3-3, side stiffener plate; 2-3-4, lifting hole; 3, central inclined cylinder leaning plate; 3-1, arc plate; 3-2, L-shaped support plate; 3-3, steel plate; 4, channel steel; 5, center line; 6, major axis; 7, minor axis; 8, longitudinal center line; 9, transverse center line. Specific embodiments

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] Reference Figure 13 , when welding the blade to the fan, positioning is required. The present invention discloses a row of blade welding and positioning device, including a blade welding and positioning device, an elliptical cylinder, a blade and a central inclined cylinder. Referring to Figure 1 and Figure 2 , the central inclined cylinder 0-3 passes through the center point of the elliptical cylinder 0-1 at an angle of 45 degrees. The blades 0-2 are welded in rows in the elliptical cylinder 0-1 to complete the basic installation of the blades 0-2. Referring to Figure 5 , the blade welding and positioning device includes a polygonal frame 1, at least two blade positioning strip plates 2 and a central inclined cylinder leaning plate 3. The blade positioning strip plates 2 are welded horizontally and parallel to each other in the polygonal frame 1. The blades 0-2 are positioned by the blade positioning strip plates 2, and the positioning of the blades 0-2 and the polygonal frame 1 is achieved through the blade positioning strip plates 2. Referring to Figure 5 , the polygonal frame 1 is placed below the elliptical cylinder 0-1, and the positioning and installation of the blade 0-2 and the elliptical cylinder 0-1 are achieved through the blade welding and positioning device. The central inclined cylinder leaning plate 3 is installed on the left side of the polygonal frame 1, and the central inclined cylinder leaning plate 3 is connected to the central inclined cylinder 0-3. The inclination direction of the central inclined cylinder 0-3 is fixed through the central inclined cylinder leaning plate 3 to ensure the stability of the installation between the blade welding and positioning device and the blade basic structure. A channel steel 4 is installed between adjacent blade positioning strip plates to connect and fix the adjacent blade positioning strip plates.

[0039] As a preferred embodiment of the present invention, in this embodiment, the length of the elliptical cylinder 0-1 is set to 8.5 meters, the width of the cylinder is 6.5 meters, and the height of the cylinder is 1 meter. The blade 0-2 is in the shape of a crescent. Refer to Figure 4 , on the left side of the central inclined cylinder 0-3, the blade 0-2 is installed as a whole. Due to the inclined installation of the central inclined cylinder 0-3, the remaining blades 0-2 are symmetrically installed on both sides of the central inclined cylinder with the horizontal center line of the polygonal frame 1 as the axis of symmetry. The length range of the blade 0-2 is 1 to 6 meters, ensuring that the length of the blade 0-2 can match the size of the elliptical cylinder 0-1 during overall installation and symmetrical installation.

[0040] Refer to Figure 6 and Figure 7 , as a preferred embodiment of the present invention, in this embodiment, the polygonal frame 1 is divided into two upper and lower pentagonal steel plates 1-1 with the horizontal center line as the dividing line. Five I-beams 1-2 and two end plates 1-3 are welded on the pentagonal steel plate 1-1. The end plates 1-3 are installed at both ends of the pentagonal steel plate 1-1 through two groups of mutually cooperating first bolts 1-4 and first nuts 1-5. The polygonal frame 1 adopts a split connection. Through the symmetrically arranged pentagonal steel plates 1-1, end plates 1-3 are installed at both ends, and the ports are fixed and combined into an octagonal frame through the first bolts 1-4 and first nuts 1-5. The overall octagonal frame has a large volume, facilitating the operation of installing the blade positioning strip 2 on one side of the pentagonal steel plate 1-1.

[0041] As a preferred embodiment of the present invention, in this embodiment, the preferred number of blade positioning strips 2 is four. When one blade positioning strip 2 is installed on one side, there will be an offset during positioning, and the symmetry of the blade 0-2 during symmetrical installation is low. Refer to Figure 4 , when two blade positioning strips 2 are installed on one side, using the principle that two points determine a straight line, positioning is carried out through the two blade positioning strips 2 to ensure the accuracy of positioning. When three blade positioning strips 2 are installed on one side, the positioning effect achieved is the same as that of installing two, and the structure is complex.

[0042] Refer to Figure 8 and Figure 9 , as a preferred embodiment of the present invention, in this embodiment, the blade positioning strip 2 includes an H-beam 2-1, a trapezoidal stiffener 2-2, and a reclining plate 2-3. The H-beam 2-1 is horizontally fixed on the polygonal frame 1. The trapezoidal stiffener 2-2 is welded to the bottom of the H-beam 2-1. The reclining plates 2-3 are fixed in rows above the H-beam 2-1. The blade positioning strip 2 is integrally fixed to the polygonal frame 1 through the H-beam 2-1.

[0043] Refer to Figure 10, as a preferred embodiment of the present invention, in this embodiment, the reclining plate 2-3 includes a positioning plate 2-3-1, a bottom plate 2-3-2 and two side rib plates 2-3-3. The positioning plate 2-3-1 is welded above the bottom plate 2-3-2, and the side rib plates 2-3-3 are welded on both sides of the positioning plate 2-3-1. The bottom plate 2-3-2 is fixed on the H-shaped steel 2-1 through the conical pin 2-4, the second bolt 2-5 and the second nut 2-6 at the bottom. Lifting holes 2-3-4 are provided on the reclining plate 2-3 for hoisting the welding and positioning device.

[0044] Reference Figure 4 , Figure 5 , Figure 7 and Figure 8 , as a preferred embodiment of the present invention, in this embodiment, a center line 5 is marked on the blade positioning strip plate 2. The center line 5 on the blade positioning strip plate 2 coincides with the longitudinal center line 8 in the polygonal frame 1, and the center line 5 on the blade positioning strip plate 2 is symmetrically installed with respect to the horizontal center line 9 in the polygonal frame 1 in a mirror image manner. By the respective correspondence of the center line 5 with the two center lines of the polygonal frame 1, the corresponding installation positions of the blade positioning strip plate 2 and the polygonal frame 1 are determined.

[0045] Reference Figure 3 and Figure 10 , as a preferred embodiment of the present invention, in this embodiment, the distance between adjacent reclining plates 2-3 is 1 mm larger than the distance between adjacent blades 0-2. A gap is left during installation to ensure that the blade 0-2 can be installed between two reclining plates 2-3.

[0046] Reference Figure 3 and Figure 10 , as a preferred embodiment of the present invention, in this embodiment, the inclination angle of the reclining plate 2-3 with respect to the horizontal direction is the same as the inclination angle of the line connecting the two sharp corners at both ends of the blade 0-2 with respect to the horizontal direction. The inclination angles are kept consistent to ensure the installation accuracy and positioning accuracy.

[0047] Reference Figure 11 and Figure 12 ​, as a preferred embodiment of the present invention, in this embodiment, the blade welding and positioning device further includes a center inclined cylinder backing plate 3, which is connected to the center inclined cylinder body 0-3. The inclination direction of the center inclined cylinder body 0-3 is fixed through the center inclined cylinder backing plate 3 to ensure the stability of installation. The center inclined cylinder backing plate 3 is welded to the left side of the polygonal frame 1. The center inclined cylinder backing plate 3 includes an arc plate 3-1, an L-shaped support plate 3-2, and a steel plate 3-3. The two L-shaped support plates 3-2 are welded above the steel plate 3-3, the arc plate 3-1 is welded above the L-shaped support plate 3-2, and the steel plate 3-3 is welded to the polygonal frame 1 to fix the center inclined cylinder backing plate 3 to the polygonal frame 1.

[0048] Reference Figure 5 , as a preferred embodiment of the present invention, in this embodiment, the arc size of the arc plate 3-1 in the center inclined cylinder backing plate 3 is the same as the outer diameter size of the center inclined cylinder body 0-3. The arc plate 3-1 matches the center inclined cylinder body 0-3 to play a supporting role, thereby fixing the inclination angle of the center inclined cylinder body 0-3.

[0049] Reference Figure 2 and Figure 4 , as a preferred embodiment of the present invention, in this embodiment, the horizontal center line 9 and the vertical center line 8 of the polygonal frame 1 coincide with the major axis 6 and the minor axis 7 of the elliptical cylinder body 0-1 respectively. By corresponding the axis of the elliptical cylinder body 0-1 with the two center lines of the polygonal frame 1, the positioning position of the elliptical cylinder body 0-1 and the polygonal frame 1 is determined, improving the accuracy during installation, and thus improving the positioning precision.

[0050] As a preferred embodiment of the present invention, in this embodiment, a method for welding and positioning blades using the blade welding and positioning device includes the following steps:

[0051] Step 1: The blade positioning strip plates 2 are welded horizontally and parallel to each other in the polygonal frame 1. The center line 5 marked on the blade positioning strip plates 2 coincides with the vertical center line 8 in the polygonal frame 1, and the center line 5 marked on the blade positioning strip plates 2 is symmetrically installed with respect to the horizontal center line 9 in the polygonal frame 1 in a mirror image manner. By the symmetric installation of the center line 5 with the two center lines of the polygonal frame 1 respectively, the corresponding installation positions of the blade positioning strip plates 2 and the polygonal frame 1 are determined;

[0052] Step 2: Place the polygonal frame 1 under the elliptical cylinder body 0-1. The major axis 6 and the minor axis 7 of the elliptical cylinder body 0-1 coincide with the horizontal and vertical center lines of the polygonal frame 1 respectively to achieve the installation and positioning of the polygonal frame 1 and the elliptical cylinder body 0-1;

[0053] Step 3: The reclining plate 2-3 is fixed on the H-beam 2-1 through a taper pin 2-4, a second bolt 2-5 and a second nut 2-6. The H-beam 2-1 is horizontally fixed on the polygonal frame 1, so that the blade positioning strip plate 2 and the polygonal frame 1 are fixed.

[0054] Step 4: The blade 0-2 is inserted between two reclining plates 2-3. The inclination angle of the reclining plate 2-3 with respect to the horizontal direction is the same as the inclination angle of the line connecting the two sharp corners at both ends of the blade 0-2 with respect to the horizontal direction. The installation position and installation angle between the row of blades 0-2 and the blade positioning strip plate 2 are fixed through the reclining plate 2-3, so as to realize the positioning installation of the blade 0-2 and the polygonal frame 1.

[0055] Step 5: The central inclined cylinder 0-3 passes through the center point of the elliptical cylinder 0-1 at an inclination of 45 degrees. The arc size of the arc plate 3-1 in the central inclined cylinder support plate 3 is the same as the outer diameter size of the central inclined cylinder 0-3, which plays a supporting role, so as to fix the inclination angle of the central inclined cylinder 0-3, and thus realize the positioning installation of the whole row of blades 0-2.

[0056] The working principle of the present invention is: during actual use, first complete the welding operations of various welded parts, prepare all other various parts in the device. The central inclined cylinder 0-3 passes through the center point of the elliptical cylinder 0-1 at an inclination of 45 degrees, and the blades 0-2 are welded in rows in the elliptical cylinder 0-1, constituting the basic installation of the blade 0-2, the elliptical cylinder 0-1 and the central inclined cylinder 0-3.

[0057] Four blade positioning strip plates 2 are welded horizontally and parallel to each other in the polygonal frame 1. The polygonal frame 1 is divided into two upper and lower pentagonal steel plates 1-1 with the horizontal center line as the dividing line. Five I-beams 1-2 and two end plates 1-3 are welded on the pentagonal steel plate 1-1. The two ends are fixed through two groups of cooperating first bolts 1-4 and first nuts 1-5 to form an octagonal frame. The overall octagonal frame is large in volume. The polygonal frame 1 adopts a split connection. Operating on one side of the pentagonal steel plate 1-1 is more convenient than the overall installation operation. Two blade positioning strip plates 2 are installed on one side. Using the principle that two points determine a straight line, positioning is carried out through two blade positioning strip plates 2 on one side to improve the positioning accuracy. The adjacent blade positioning strip plates 2 are connected and fixed through the channel steel 4. The L-shaped support plate 3-2 of the central inclined cylinder support plate 3 is welded above the steel plate 3-3, and the arc plate 3-1 is welded above the L-shaped support plate 3-2. The steel plate 3-3 is welded on the polygonal frame 1 to fix the central inclined cylinder support plate 3 and the polygonal frame 1, constituting the structure of the blade welding and positioning device.

[0058] The polygonal frame 1 is placed below the elliptical cylinder 0-1. The major axis 6 and the minor axis 7 of the elliptical cylinder 0-1 coincide with the longitudinal center line 8 and the transverse center line 9 of the polygonal frame 1 respectively. By corresponding the axis of the elliptical cylinder 0-1 with the two center lines of the polygonal frame 1, the positioning position of the elliptical cylinder 0-1 and the polygonal frame 1 is determined, improving the accuracy during installation, thus enhancing the positioning precision and realizing the positioning of the blade 0-2 and the elliptical cylinder 0-1.

[0059] The H-shaped steel 2-1 of the blade positioning strip plate 2 is horizontally fixed on the polygonal frame 1. The trapezoidal stiffener 2-2 is welded to the bottom of the H-shaped steel 2-1. The positioning plate 2-3-1 of the inclined plate 2-3 is welded above the bottom plate 2-3-2. The side stiffener plates 2-3-3 are welded on both sides of the positioning plate 2-3-1. The bottom plate 2-3-2 is fixed on the H-shaped steel 2-1 through the conical pin 2-4, the second bolt 2-5 and the second nut 2-6 at the bottom. Lifting holes 2-3-4 are provided on the inclined plates 2-3 for lifting the blade welding and positioning device. The blade 0-2 is inserted between two inclined plates 2-3. The distance between adjacent inclined plates 2-3 is 1 mm larger than the distance between adjacent blades 0-2, leaving a gap during installation to ensure that the blade 0-2 can be installed between two inclined plates 2-3. The inclination angle of the inclined plate 2-3 with respect to the horizontal direction is the same as the inclination angle of the connecting line of the two sharp corners at both ends of the blade 0-2 with respect to the horizontal direction, keeping the inclination angle consistent to ensure the installation precision and positioning accuracy. The installation position and installation angle between the blade 0-2 and the blade positioning strip plate 2 are fixed through the inclined plate 2-3. The center line 5 of the blade positioning strip plate 2 corresponds to the two center lines of the polygonal frame 1 respectively, determining the corresponding installation position of the blade positioning strip plate 2 and the polygonal frame 1 for positioning, thus realizing the positioning installation of the blade 0-2 and the polygonal frame 1.

[0060] The length of the elliptical cylinder 0-1 is set to 8.5 meters, the width is 6.5 meters, and the height is 1 meter. The blade 0-2 is in a crescent shape. The blade 0-2 on the left side of the central inclined cylinder 0-3 is installed as a whole, and the remaining blades 0-2 are symmetrically installed with respect to the transverse center line of the polygonal frame 1 as the axis of symmetry. The length range of the blade 0-2 is 1 - 6 meters, ensuring that the length of the blade 0-2 can match the dimensions of the elliptical cylinder 0-1 during overall installation and symmetrical installation.

[0061] The central inclined cylinder support plate 3 is connected to the central inclined cylinder 0-3. The arc size of the arc plate 3-1 in the central inclined cylinder support plate 3 is the same as the outer diameter size of the central inclined cylinder 0-3. By matching the arc plate 3-1 with the central inclined cylinder 0-3, it plays a supporting role, thus fixing the inclination angle of the central inclined cylinder 0-3. By finally realizing the welding and positioning of the row of blades 0-2, the row positioning improves the product manufacturing efficiency, the design structure is simple, the layout is reasonable, and the manufacturing cost is low.

[0062] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0063] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "set", "connected", "fixed", "swivelly connected", "padded", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0064] The above description shows and describes the preferred embodiments of the present invention. As mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the technology or knowledge in related fields. And the changes and modifications made by those skilled in the art that do not depart from the spirit and scope of the present invention should all be within the protection scope of the appended claims of the present invention.

Claims

1. A positioning device for welding and assembling rowed blades, comprising a positioning device for welding and assembling blades, an elliptical cylinder (0-1), blades (0-2) and a central inclined cylinder (0-3), characterized in that: The central inclined cylinder (0-3) passes through the center point of the elliptical cylinder (0-1) at an inclination of 20 to 80 degrees, and the blades (0-2) are installed in rows within the elliptical cylinder (0-1). The blade welding and positioning device includes a polygonal frame (1), at least two blade positioning strip plates (2), and a central inclined cylinder backing plate (3). The blade positioning strip plates (2) are installed horizontally and parallel to each other in the polygonal frame (1). The blades (0-2) are positioned by the blade positioning strip plates (2). The polygonal frame (1) is placed below the elliptical cylinder (0-1), and the central inclined cylinder backing plate (3) is installed on the left side of the polygonal frame (1). The central inclined cylinder backing plate (3) is connected to the central inclined cylinder (0-3). Channel steels (4) are installed between adjacent blade positioning strip plates (2). The blade positioning strip plate (2) includes an H-shaped steel (2-1), trapezoidal stiffeners (2-2), and at least two inclined backing plates (2-3). The H-shaped steel (2-1) is fixed horizontally on the polygonal frame (1). The trapezoidal stiffeners (2-2) are installed at the bottom of the H-shaped steel (2-1). The inclined backing plates (2-3) are fixed in rows above the H-shaped steel (2-1). The inclined backing plate (2-3) includes a positioning plate (2-3-1), a bottom plate (2-3-2), and two side stiffener plates (2-3-3). The positioning plate (2-3-1) is installed above the bottom plate (2-3-2). The side stiffener plates (2-3-3) are installed on both sides of the positioning plate (2-3-1). The bottom plate (2-3-2) is fixed on the H-shaped steel (2-1) through a conical pin (2-4), a second bolt (2-5), and a second nut (2-6) at the bottom. Lifting holes (2-3-4) are provided on each inclined backing plate (2-3) for hoisting the blade welding and positioning device. Center lines (5) are marked on the blade positioning strip plates (2). The center lines (5) on the blade positioning strip plates (2) coincide with the longitudinal center line (8) in the polygonal frame (1), and the center lines (5) on the blade positioning strip plates (2) are installed symmetrically with respect to the horizontal center line (9) in the polygonal frame (1) in a mirror image manner.

2. The welding and positioning device for rowed blades according to claim 1, wherein: The polygonal frame (1) is divided into upper and lower pentagonal steel plates (1-1) with the horizontal center line as the dividing line. At least two I-beams (1-2) and end plates (1-3) are installed on the pentagonal steel plates (1-1). The end plates (1-3) are installed at both ends of the pentagonal steel plates (1-1) through at least two sets of cooperating first bolts (1-4) and first nuts (1-5).

3. The row of blade welding and positioning device according to claim 2, characterized in that: The distance between adjacent inclined backing plates (2-3) is 0 to 2 mm larger than the distance between adjacent blades (0-2).

4. The row of blade welding and positioning device according to claim 3, characterized in that: The inclination angle of the inclined backing plate (2-3) with respect to the horizontal direction is the same as the inclination angle of the line connecting the two sharp corners at both ends of the blade (0-2) with respect to the horizontal direction.

5. The welding positioning device for rowed blades according to claim 1, characterized in that: The central inclined cylinder backing plate (3) includes an arc plate (3-1), an L-shaped support plate (3-2) and a steel plate (3-3). The L-shaped support plate (3-2) is installed above the steel plate (3-3), and the arc plate (3-1) is installed above the L-shaped support plate (3-2).

6. The row of blade welding and positioning device according to claim 1, characterized in that: The major axis (6) and the minor axis (7) of the elliptical cylinder body (0-1) coincide with the transverse center line (9) and the longitudinal center line (8) of the polygonal frame (1) respectively.

7. A method for welding and positioning blades by using the blade welding and positioning device according to any one of claims 1 to 6, comprising the following steps: Step 1: Blade positioning strip plates (2) are welded horizontally and parallel to each other in the polygonal frame (1). The center line (5) marked on the blade positioning strip plates (2) coincides with the longitudinal center line (8) in the polygonal frame (1). The center line (5) marked on the blade positioning strip plates (2) is symmetrically installed with respect to the transverse center line (9) in the polygonal frame (1) in a mirror image manner. By the respective correspondence between the center line (5) and the two center lines of the polygonal frame (1), the corresponding installation positions of the blade positioning strip plates (2) and the polygonal frame (1) are determined for positioning. Step 2: The polygonal frame (1) is placed below the elliptical cylinder body (0-1). The major axis (6) and the minor axis (7) of the elliptical cylinder body (0-1) coincide with the transverse and longitudinal center lines of the polygonal frame (1) respectively, so as to realize the installation and positioning of the polygonal frame (1) and the elliptical cylinder body (0-1). Step 3: The inclined backing plate (2-3) is fixed on the H-shaped steel (2-1) through a tapered pin (2-4), a second bolt (2-5) and a second nut (2-6). The H-shaped steel (2-1) is horizontally fixed on the polygonal frame (1), so that the blade positioning strip plates (2) and the polygonal frame (1) are fixed. Step 4: The blade (0-2) is inserted between two inclined backing plates (2-3). The inclination angle of the inclined backing plate (2-3) with respect to the horizontal direction is the same as the inclination angle of the line connecting the two sharp corners at both ends of the blade (0-2) with respect to the horizontal direction. The installation position and installation angle between the row of blades (0-2) and the blade positioning strip plates (2) are fixed through the inclined backing plates (2-3), so as to realize the positioning installation of the blade (0-2) and the polygonal frame (1). Step 5: The central inclined cylinder body (0-3) passes through the center point of the elliptical cylinder body (0-1) at an inclination angle of 20 to 80 degrees. The arc size of the arc plate (3-1) in the central inclined cylinder backing plate (3) is the same as the outer diameter size of the central inclined cylinder body (0-3), which plays a supporting role, so as to fix the inclination angle of the central inclined cylinder body (0-3), and thus realize the overall positioning installation of the row of blades (0-2).

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