Axial flow blade combined lifting appliance

Abstract

The invention discloses an axial flow blade combined lifting appliance which comprises flange lifting appliances, skirt lifting appliances, rotary lifting rings and shackles, the two flange lifting appliances are connected with the flange ends of axial flow blades, the two skirt lifting appliances are connected with the skirt ends of the axial flow blades, and the rotary lifting rings are connected with the shackles. And the lifting device is connected with a rotary lifting ring fixed at the top ends of the two flange lifting appliances through a steel wire rope, and is connected with a shackle fixed at the top ends of the two skirt lifting appliances through a steel wire rope, so that the horizontal lifting of the axial flow blade is completed through four lifting fulcrums. According to the axial flow blade combined lifting appliance, the characteristics of the blade are fully utilized, the safety of the lifting appliance is ensured, meanwhile, the lifting appliance is very convenient and efficient to use, and due to the fact that welding and polishing work is not needed, adverse effects on the blade are avoided, and the mode of welding a lifting lug can be replaced.

Description

Technical Field

[0001] This application belongs to the field of auxiliary devices in the hydropower field, and particularly relates to an axial flow blade combined sling. Background Art

[0002] Currently, during the assembly process of an axial flow runner, the blades need to be lifted horizontally to be installed into the hub body. To lift the blades horizontally, usually four welding lugs are welded on the back of the blades, as shown in Figure 1 and Figure 2 shown. To ensure the safety of the lifting operation, non-destructive testing must be performed on the welds between the welding lugs and the blades, including ultrasonic flaw detection and penetrant inspection, to ensure that there are no cracks inside and on the surface of the welds before use; after the assembly is completed, the welding lugs need to be cut off, and then the welds on the blades are ground flat, and a penetrant inspection is also required to ensure that there are no welding cracks on the surface of the blades.

[0003] Generally, an axial flow runner has 4 - 5 blades, and the total number of welding lugs is 16 - 20. The work of welding - grinding - flaw detection - cutting - grinding - flaw detection is very cumbersome, not only with low efficiency but also posing quality hazards to the blades themselves. Because the lugs are made of carbon steel while the blades are made of stainless steel, the carbon pollution caused by welding will reduce the corrosion resistance of the blades, making the blade surface prone to rust. At the same time, manually grinding the welds on the blades also damages the surface shape of the blades, making them more prone to cavitation during operation. Summary of the Invention

[0004] The purpose of this application is: to overcome the problems of the prior art, a combined sling for axial flow blades is disclosed. This combined sling for axial flow blades makes full use of the characteristics of the blades themselves, ensures the safety of the sling, and is very convenient and efficient to use. Since no welding and grinding work is required, it will not have an adverse impact on the blades. This solution can completely replace the method of welding lugs.

[0005] The purpose of this application is achieved through the following technical solutions:

[0006] A combined sling for axial flow blades, the combined sling for axial flow blades includes: a flange sling, a skirt sling, a rotating eyebolt, and a shackle. Two flange slings are connected to the flange ends of the axial flow blades, and two skirt slings are connected to the skirt ends of the axial flow blades.

[0007] The lifting device is connected to the rotating eyebolt fixed at the top of the two flange slings through a steel wire rope, and the lifting device is connected to the shackle fixed at the top of the two skirt slings through a steel wire rope, so as to complete the horizontal lifting of the axial flow blades through four lifting points.

[0008] According to a preferred embodiment, the flange sling includes: a main sling, an adjusting screw, a reducing block, and a square nut;

[0009] The bottom side of the main lifting tool is provided with an inclined guide groove, the orientation of the guide groove is inclined downward towards the screwing end of the adjusting screw, and the diameter-changing block is movably connected to the guide groove through a guide block;

[0010] The square nut is fixedly arranged between the two diameter-changing parts of the diameter-changing block. The top side of the main lifting tool is provided with a second step and a convex part, and the second step and the convex part form a hook-shaped structure;

[0011] The adjusting screw is horizontally arranged at the bottom end of the main lifting tool, passes through the diameter-changing block and the square nut, and the adjusting screw and the square nut are connected to each other through a threaded structure. When the adjusting screw is screwed, the diameter-changing block moves along the guide groove.

[0012] According to a preferred embodiment, when the adjusting screw is rotated clockwise, the square nut moves towards the screwing end of the adjusting screw, thereby driving the diameter-changing block to move together. When the diameter-changing block moves towards the screwing end of the adjusting screw, the inclined surface corresponding to the top guide block of the diameter-changing block jacks up the main lifting tool upwards, thereby completing the function of diameter change;

[0013] When the main lifting tool moves upwards, the hook-shaped structure is embedded into the relief groove of the flange hole. Continue to rotate the adjusting screw until it cannot be rotated anymore, that is, the fixed connection between the flange lifting tool and the flange end of the axial flow blade is completed.

[0014] According to a preferred embodiment, the bottom end of the main lifting tool is provided with a screw fixing part, and the adjusting screw passes through the screw fixing part;

[0015] And an enlarged head is arranged near the screwing end of the adjusting screw. One side of the enlarged head is in contact with the screw fixing part, and the other side of the enlarged head is in contact with a stop block. The stop block is fixed to the main lifting tool through a screw, thereby completing the limit fixation of the adjusting screw through the stop block and the screw fixing part.

[0016] According to a preferred embodiment, the diameter-changing block includes two parallel and fixedly connected first diameter-changing parts and second diameter-changing parts, and the square nut is arranged between the first diameter-changing part and the second diameter-changing part;

[0017] And two vertical first strip-shaped holes and second strip-shaped holes are respectively arranged oppositely in the first diameter-changing part and the second diameter-changing part. The adjusting screw sequentially passes through the first diameter-changing part, the square nut and the second diameter-changing part,

[0018] When the diameter-changing block moves along the adjusting screw, the diameter-changing block can move vertically relative to the adjusting screw, thereby realizing diameter change.

[0019] According to a preferred embodiment, the guide groove is a dovetail groove structure, and the guide block is a dovetail-shaped structure.

[0020] According to a preferred embodiment, a first step is provided on the top side of the main sling, and a first threaded hole is provided at the first step for accommodating a rotating lifting ring.

[0021] According to a preferred embodiment, the skirt sling includes a hook, a chuck, a bolt, and a jacking bolt;

[0022] The hook is connected to the chuck through a bolt, and a clamping cavity is formed between the hook and the chuck to complete the clamping of the top of the skirt end. A hook-shaped structure is horizontally provided on the bottom side of the hook for completing the lifting of the bottom side of the skirt end.

[0023] According to a preferred embodiment, an arc nut is matched with the bolt, and an arc-shaped groove for accommodating the arc nut is provided on the side of the chuck;

[0024] A limiting groove is provided on the side of the hook, and a limiting head is provided on the side of the chuck. The limiting head is inserted into the limiting groove.

[0025] According to a preferred embodiment, two ear plates are further provided on both sides of the hook, and a jacking bolt passes through the ear plates. The jacking bolt is connected to the ear plates through a threaded structure.

[0026] After the top of the skirt end enters the clamping cavity, rotate the jacking bolt so that the bottom end of the jacking bolt abuts against the blade skirt. Continuing to tighten will cause the hook to lift, so that the hook-shaped structures horizontally provided on the side and bottom of the hook are closely attached to the skirt end and the bottom of the axial flow blade. Then tighten the bolt to make the chuck press the inclined surface of the skirt end, completing the fixation of the skirt sling and the skirt end.

[0027] The main solution of the present application and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in the present application. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding the solution of the present application, all of which are the technical solutions to be protected in the present application and will not be enumerated here.

[0028] Advantages of the present application:

[0029] By adopting the combined sling of the present application, the disadvantages of welded lifting lugs are completely avoided, and there are no longer these cumbersome processes such as welding - grinding - flaw detection - cutting - grinding - flaw detection, greatly saving time. The combined sling of the present application is simple to use and has strong versatility, and can be made into a series of sling products to adapt to different sizes of blades. Description of the Drawings

[0030] Figure 1 is a schematic diagram of the connection structure between a traditional sling and an axial flow blade;

[0031] Figure 2 is a schematic diagram of the connection relationship between a traditional sling and an axial flow blade;

[0032] Figure 3 It is a schematic diagram of the connection relationship between the combined sling and the axial flow blade in this application;

[0033] Figure 4 It is a schematic diagram of the connection structure between the combined sling and the axial flow blade in this application;

[0034] Figure 5 It is an enlarged schematic diagram of the connection relationship between the combined sling and the axial flow blade in this application;

[0035] Figure 6 It is a schematic diagram of the structure of the flange sling in the combined sling of this application;

[0036] Figure 7 It is a schematic diagram of the working principle of the flange sling in the combined sling of this application;

[0037] Figure 8 It is a schematic diagram of the structure of the main sling of the flange sling in the combined sling of this application;

[0038] Figure 9 is Figure 8 The enlarged schematic diagram of the B-B section in;

[0039] Figure 10 It is a schematic diagram of the structure of the diameter-changing block of the flange sling in the combined sling of this application;

[0040] Figure 11 is Figure 10 The enlarged schematic diagram of the C-C section in;

[0041] Figure 12 It is a schematic diagram of the connection relationship between the skirt sling and the blade in the combined sling of this application;

[0042] Figure 13 It is a schematic diagram of the structure of the skirt sling in the combined sling of this application;

[0043] Figure 14 is Figure 13 The enlarged schematic diagram of part B in;

[0044] Among them, 100 - flange sling, 101 - main sling, 102 - first step, 103 - first threaded hole, 104 - second step, 105 - protrusion, 106 - stop block, 107 - screw, 108 - adjusting screw rod, 109 - reducing block, 110 - first reducing part, 111 - second reducing part, 112 - square nut, 113 - guide groove, 114 - second threaded hole, 115 - screw rod fixing part, 116 - first strip-shaped groove, 117 - second strip-shaped groove, 118 - guide block, 200 - skirt sling, 201 - hook, 202 - chuck, 203 - limit head, 204 - arc nut, 205 - bolt, 206 - limit groove, 207 - clamping cavity, 208 - jacking bolt, 300 - rotating eyebolt, 400 - shackle, 500 - axial flow blade, 501 - flange end, 502 - skirt end, 503 - flange hole, 504 - relief groove. Detailed implementation mode

[0045] The following uses specific specific examples to illustrate the implementation mode of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0046] It should be noted that: Similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0047] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing the present application 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, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0048] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0049] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0050] In addition, it should be pointed out in the present application that in the present application, if the specifically involved structure, connection relationship, position relationship, power source relationship, etc. are not specifically written out, the structure, connection relationship, position relationship, power source relationship, etc. involved in the present application are all those that can be known by those skilled in the art on the basis of the prior art without creative labor.

[0051] Embodiment 1

[0052] Reference Figures 3 to 14 As shown, a combined lifting tool for an axial flow blade 500 is shown in the figure. The combined lifting tool for the axial flow blade 500 includes: a flange lifting tool 100, a skirt lifting tool 200, a rotating sling 300, and a shackle 400. Two flange lifting tools 100 are connected to the flange end 501 of the axial flow blade 500, and two skirt lifting tools 200 are connected to the skirt end 502 of the axial flow blade 500. The lifting device is connected to the rotating sling 300 fixed to the top ends of the two flange lifting tools 100 through a steel wire rope, and the lifting device is connected to the shackle 400 fixed to the top ends of the two skirt lifting tools 200 through a steel wire rope, so as to complete the horizontal lifting of the axial flow blade 500 through four lifting fulcrums.

[0053] Preferably, the flange lifting tool 100 includes: a main lifting tool 101, an adjusting screw 108, a reducing block 109, and a square nut 112.

[0054] An inclined guide groove 113 is provided on the bottom side of the main lifting tool 101. The orientation of the guide groove 113 is inclined downward with respect to the screwing end of the adjusting screw 108, and the reducing block 109 is movably connected to the guide groove 113 through a guide block 118;

[0055] The square nut 112 is fixedly arranged between the two reduced-diameter portions of the reducing block 109. A second step 104 and a protruding portion 105 are provided on the top side of the main lifting tool 101, and the second step 104 and the protruding portion 105 form a hook-shaped structure;

[0056] The adjusting screw 108 is horizontally arranged at the bottom end of the main sling 101 and penetrates through the diameter-changing block 109 and the square nut 112. The adjusting screw 108 is connected to the square nut 112 through a threaded structure. When the adjusting screw 108 is turned, the diameter-changing block 109 moves along the guide groove 113.

[0057] When the adjusting screw 108 is rotated clockwise, the square nut 112 moves towards the turning end of the adjusting screw 108, thereby driving the diameter-changing block 109 to move together. When the diameter-changing block 109 moves towards the turning end of the adjusting screw 108, the inclined surface corresponding to the top guide block 118 of the diameter-changing block 109 jacks up the main sling 101 upwards, thereby completing the function of diameter change. When the main sling 101 moves upwards, the hook-shaped structure is embedded into the relief groove 504 of the flange hole 503. Continue to rotate the adjusting screw 108 until it cannot be turned any further, that is, the fixed connection between the flange sling 100 and the flange end 501 of the axial flow blade 500 is completed.

[0058] Preferably, the diameter-changing block 109 includes a first diameter-changing part 110 and a second diameter-changing part 111 that are parallel and fixedly connected to each other. The square nut 112 is arranged between the first diameter-changing part 110 and the second diameter-changing part 111. Vertically arranged first and second strip-shaped holes are respectively oppositely arranged inside the first diameter-changing part 110 and the second diameter-changing part 111. The adjusting screw 108 sequentially penetrates through the first diameter-changing part 110, the square nut 112, and the second diameter-changing part 111. When the diameter-changing block 109 moves along the adjusting screw 108, the diameter-changing block 109 can move vertically relative to the adjusting screw 108, thereby realizing diameter change.

[0059] Preferably, the guide groove 113 is a dovetail groove structure, and the guide block 118 is a dovetail-shaped structure. Through the structural design of the guide groove 113 and the guide block 118, the functions of guiding and limiting are realized, so that the diameter-changing block 109 can only move along the guide groove 113 and will not fall off the main sling.

[0060] Preferably, a screw fixing part 115 is provided at the bottom end of the main sling 101, and the adjusting screw 108 is arranged through the screw fixing part 115. An enlarged head is provided near the turning end of the adjusting screw 108. One side of the enlarged head is in contact with the screw fixing part 115, and the other side of the enlarged head is in contact with the stop block 106. The stop block 106 is fixed to the main sling 101 through a screw 107, thereby completing the limit fixation of the adjusting screw 108 through the stop block 106 and the screw fixing part 115, that is, enabling the adjusting screw 108 to rotate without moving left and right.

[0061] Preferably, a first step 102 is provided on the top side of the main sling 101, and a first threaded hole 103 is provided at the first step 102 for accommodating the rotating sling 300.

[0062] Preferably, the skirt hanger 200 includes a hook 201, a chuck 202, a bolt 205 and a jacking bolt 208; the hook 201 is connected to the chuck 202 via the bolt 205, and a clamping cavity 207 is formed between the hook 201 and the chuck 202 to complete the clamping of the top of the skirt end 502, and a hook-shaped structure is transversely provided on the bottom side of the hook 201 for lifting the bottom side of the skirt end 502.

[0063] Matched with the bolt 205 is an arc nut 204, and an arc-shaped groove for accommodating the arc nut 204 is provided on the side of the chuck 202. When the inclined surface angles of different blade skirts are different, the skirt chuck 202 will rotate by an angle along the arc surface of the arc nut 204 to automatically adapt to the skirt inclined surface, so as not to affect the stress state of the bolt 205, ensuring that no additional shear force acts on the bolt 205 and guaranteeing the safe use of the bolt 205.

[0064] A limiting groove 206 is provided on the side of the hook 201, and a limiting head 203 is provided on the side of the chuck 202, and the limiting head 203 is inserted into the limiting groove 206. Thus, through the structural design of mutual embedding between the chuck 202 and the hook 201, the self-rotation of the chuck can be prevented when the bolt 205 is rotated.

[0065] Preferably, two ear plates are further provided on both sides of the hook 201, and a jacking bolt 208 is penetrated through the ear plates. The jacking bolt 208 is connected to the ear plates via a threaded structure. After the top of the skirt end 502 enters the clamping cavity 207, the jacking bolt 208 is rotated so that the bottom end of the jacking bolt 208 abuts against the blade skirt. Continuing to tighten will lift the hook 201, so that the hook-shaped structures transversely provided on the side and bottom of the hook 201 are closely attached to the skirt end 502 and the bottom of the axial flow blade 500. Then the bolt 205 is tightened to make the chuck 202 press the inclined surface of the skirt end 502, completing the fixation of the skirt hanger 200 and the skirt end 502. The function of the jacking bolt 208 is not only to lift the hook 201, but also to prevent the skirt hanger 200 from tilting during the hoisting process, ensuring the hoisting safety.

[0066] By adopting the combined hanger of the present application, the disadvantages of welded lifting lugs are completely avoided, and there are no longer these cumbersome processes such as welding - grinding - flaw detection - cutting - grinding - flaw detection, greatly saving time. The combined hanger of the present application is simple to use and has strong versatility, and can be made into a series of hanger products to adapt to blades of different sizes.

[0067] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An axial flow blade combined sling, characterized in that, The axial flow blade combined sling includes: a flange sling (100), a skirt sling (200), a rotating eyebolt (300) and a shackle (400). Two flange slings (100) are connected to the flange end (501) of the axial flow blade (500), and two skirt slings (200) are connected to the skirt end (502) of the axial flow blade (500). The lifting device is connected to the rotating eyebolt (300) fixed at the top of the two flange slings (100) through a steel wire rope, and the lifting device is connected to the shackle (400) fixed at the top of the two skirt slings (200) through a steel wire rope, so as to complete the horizontal lifting of the axial flow blade (500) through four lifting fulcrums.

2. The axial flow blade combined sling according to claim 1, characterized in that, The flange sling (100) includes: a main sling (101), an adjusting screw (108), a reducing block (109) and a square nut (112); An inclined guide groove (113) is provided on the bottom side of the main sling (101). The orientation of the guide groove (113) is inclined downward towards the screwing end of the adjusting screw (108). The reducing block (109) is movably connected to the guide groove (113) through a guide block (118); The square nut (112) is fixedly arranged between the two reducing parts of the reducing block (109). A second step (104) and a protruding part (105) are provided on the top side of the main sling (101), and the second step (104) and the protruding part (105) form a hook-shaped structure; The adjusting screw (108) is horizontally arranged at the bottom end of the main sling (101), passes through the reducing block (109) and the square nut (112), and the adjusting screw (108) is connected to the square nut (112) through a threaded structure. When the adjusting screw (108) is screwed, the reducing block (109) moves along the guide groove (113).

3. The axial flow blade combination sling according to claim 2, characterized in that, When the adjusting screw (108) is rotated clockwise, the square nut (112) moves towards the screwing end of the adjusting screw (108), thereby driving the reducing block (109) to move together. When the reducing block (109) moves towards the screwing end of the adjusting screw (108), the inclined surface corresponding to the top guide block (118) of the reducing block (109) jacks up the main sling (101) upward, so as to complete the reducing function; When the main sling (101) moves upward, the hook-shaped structure is embedded into the relief groove (504) of the flange hole (503), and the adjusting screw (108) is continuously rotated until it cannot be rotated any further, that is, the fixed connection between the flange sling (100) and the flange end (501) of the axial flow blade (500) is completed.

4. The axial flow blade combined sling according to claim 2, wherein, A screw fixing part (115) is provided at the bottom end of the main sling (101), and the adjusting screw (108) passes through the screw fixing part (115); Moreover, an enlarged head is provided near the screwing end of the adjusting screw (108). One side of the enlarged head is in contact with the screw fixing part (115), and the other side of the enlarged head is in contact with the stop block (106). The stop block (106) is fixed to the main lifting tool (101) by a screw (107), so that the limiting and fixing of the adjusting screw (108) is completed through the stop block (106) and the screw fixing part (115).

5. The axial flow blade combination sling according to claim 4, wherein, The variable diameter block (109) includes a first variable diameter part (110) and a second variable diameter part (111) which are parallel and fixedly connected to each other. The square nut (112) is arranged between the first variable diameter part (110) and the second variable diameter part (111); Moreover, two first strip holes (116) and second strip holes (117) which are vertical are oppositely arranged in the first variable diameter part (110) and the second variable diameter part (111) respectively. The adjusting screw (108) sequentially penetrates through the first variable diameter part (110), the square nut (112) and the second variable diameter part (111), When the variable diameter block (109) moves along the adjusting screw (108), the variable diameter block (109) can move vertically relative to the adjusting screw (108), so as to realize variable diameter.

6. The axial flow blade combination sling according to claim 4, wherein, The guide groove (113) is of a dovetail groove structure, and the guide block (118) is of a dovetail shape structure.

7. The axial flow blade combined sling according to claim 2, wherein, A first step (102) is provided on the top side of the main lifting tool (101), and a first threaded hole (103) is provided at the first step (102) for accommodating the rotating lifting ring (300).

8. The axial flow blade combined sling according to claim 4, wherein, The skirt lifting tool (200) includes a hook (201), a chuck (202), a bolt (205) and a jacking bolt (208); The hook (201) is connected to the chuck (202) by a bolt (205). A clamping cavity (207) is formed between the hook (201) and the chuck (202) to complete the clamping of the top of the skirt end (502). A hook-shaped structure is transversely arranged at the bottom side of the hook (201) for completing the lifting of the bottom side of the skirt end (502).

9. The axial flow blade combined sling according to claim 8, wherein, Matched with the bolt (205) is an arc nut (204), and an arc groove for accommodating the arc nut (204) is provided on the side surface of the chuck (202); A limiting groove (206) is provided on the side surface of the hook (201), and a limiting head (203) is provided on the side surface of the chuck (202). The limiting head (203) is inserted into the limiting groove (206).

10. The axial flow blade combined sling according to claim 8, wherein, Two ear plates are further provided on both sides of the hook (201), and a jacking bolt (208) penetrates through the ear plates. The jacking bolt (208) is connected to the ear plates through a threaded structure, After the top of the skirt end (502) enters the clamping cavity (207), rotate the jacking bolt (208) to make the bottom end of the jacking bolt (208) press against the blade skirt. Continue to tighten to lift the hook (201), so that the hook-shaped structures transversely arranged on the side surface and the bottom side of the hook (201) are closely attached to the skirt end (502) and the bottom of the axial flow blade (500). Then tighten the bolt (205) to make the chuck (202) press the inclined surface of the skirt end (502) to complete the fixation of the skirt lifting tool (200) and the skirt end (502).

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