Small-sized rotary lifting appliance for erecting water turbine runner overhauling bent frame and base of small-sized rotary lifting appliance

Abstract

The utility model relates to the field of bent frame boundary beam hoisting tools, and discloses a small-sized rotary hoisting tool for erecting a water turbine runner overhaul bent frame and a base thereof, the small-sized rotary hoisting tool comprises a vertical column and a pull rod which are vertically arranged, the vertical column is fixed on a bent frame center platform, and the pull rod is fixed above the vertical column through a rotary bearing. A horizontally-arranged cross arm is fixed to the lower portion of the pull rod, one end of the cross arm is fixedly connected with a supporting rod in the horizontal direction, the connecting position of the cross arm and the supporting rod can be adjusted, and a hook is arranged at the movable end of the supporting rod. The positioning device has the beneficial effects that the positioning is more accurate, the horizontal state of the bent frame boundary beam can be kept, the alignment of bolt mounting holes is not influenced, the mounting is more convenient and efficient, the working intensity of operators is reduced, the safety risk in the operation process is reduced, and the connection stability of the rotary lifting appliance and the bent frame center platform is ensured.

Description

Technical Field

[0001] The utility model relates to the field of lifting tools for bent frames of side beams, in particular to a small rotary sling and its base for erecting a maintenance bent frame of a water turbine runner. Background Art

[0002] The maintenance bent frame of the water turbine runner is a special platform for water turbine maintenance. According to the horizontal condition of the bottom of the draft tube elbow, the bent frame is divided into two assembly methods: integral assembly and step-by-step assembly. When the bottom of the draft tube elbow is arc-shaped, the step-by-step assembly method is adopted. First, the central platform of the bent frame is assembled at the center of the bottom of the draft tube elbow, and after it is lifted to the position of the cone tube access door, the side beam of the bent frame is installed in the air and the panel is laid, thus completing the erection work of the overall bent frame.

[0003] In the past, the method of installing the side beam of the bent frame in the air was to lower guy ropes from the movable guide vanes of the water turbine volute, hoist the side beam of the bent frame, and the operators stood on the central platform of the bent frame to install the connecting bolts between the side beam and the central platform of the bent frame, thus completing the assembly of the side beam of the bent frame. However, in this operation method, the position where the guy ropes are lowered is at the edge of the elbow, while the installation positioning point of the side beam of the bent frame is about 3 m inward from the edge of the elbow. It is not easy to pull the guy ropes at the edge of the elbow to the installation positioning place, and when it is pulled to the installation positioning place, it is not in a horizontal state, and the bolt installation holes are not easy to align. Therefore, this operation method has the disadvantages of difficult operation, inaccurate positioning of the side beam of the bent frame, high working intensity of the operators, and concentrated safety risks during the operation process. Content of the Utility Model

[0004] In order to overcome the problems of difficult operation, inaccurate positioning of the side beam of the bent frame, high working intensity of the operators, and concentrated safety risks during the operation process when using the guy rope lowering method for step-by-step assembly and installation of the side beam in the above background art, the utility model provides a small rotary sling and its base for erecting a maintenance bent frame of a water turbine runner. By setting that the cross arm can adjust the connection position with the support rod and change the extending length of the support rod, after the side beam of the bent frame is hoisted, it can be aligned with the installation positioning place on the central platform of the bent frame, and it has the beneficial effects of more accurate positioning, being able to maintain a horizontal state, not affecting the alignment of the bolt installation holes, more convenient and efficient installation, reducing the working intensity of the operators, reducing the safety risks during the operation process, and ensuring the connection stability between the rotary sling and the central platform of the bent frame.

[0005] The technical solution of the utility model is as follows:

[0006] A small rotary sling for erecting a maintenance bent frame of a water turbine runner includes a vertically arranged column and a pull rod. The column is fixed on the central platform of the bent frame, the pull rod is fixed above the column through a slewing bearing, a horizontally arranged cross arm is fixed at the lower part of the pull rod, one end of the cross arm is fixedly connected with a support rod along the horizontal direction and the connection position with the support rod can be adjusted, and a hook is arranged at the movable end of the support rod.

[0007] Compared with the prior art, the beneficial effects of the present technical solution are as follows:

[0008] (1) By fixing the upright column on the center platform of the bent frame, it is convenient for this lifting tool to lift and then install and lay the bent frame side beams around the lower part of the center platform of the bent frame;

[0009] (2) Since the pull rod and the upright column are fixed together through a slewing bearing, on the basis of maintaining a stable connection with the upright column, the pull rod can also rotate itself and cooperate with the cross arm to adjust its extending direction, so that the hook can lift the bent frame side beams in all directions, which is more convenient for on-site construction;

[0010] (3) Since the connection position of the cross arm and the support rod can be adjusted, the connection length between the two can be changed, thereby changing the overall length of the support rod and the cross arm. Therefore, the extending length of the support rod can be adjusted according to the position of the installation positioning point of the bent frame side beam, so as to change the lowering position of the hook. After the hook lifts the bent frame side beam, it can be aligned with the installation positioning place on the center platform of the bent frame, with more accurate positioning and the ability to maintain a horizontal state, which will not affect the alignment of the bolt installation holes, making the installation more convenient and efficient, reducing the work intensity of the operators, reducing the safety risks during the operation, and greatly improving the overall erection efficiency of the bent frame side beam.

[0011] Preferably, the hook is connected to an electric winch through a sling, and the electric winch is fixed on the side of the cross arm far from the support rod.

[0012] Further preferably, a pulley is fixed at the movable end of the support rod, and the sling passes around the surface of the pulley and is fixedly connected to the hook.

[0013] Preferably, a first cable and a second cable are fixed at the top of the pull rod, the first cable is fixedly connected to the cross arm, and the second cable is fixedly connected to the support rod.

[0014] Further preferably, brackets are respectively fixed at the tails of the cross arm and the support rod, and the two brackets are respectively fixedly connected to the first cable and the second cable.

[0015] Further preferably, one end of the third cable is also fixedly connected to the top of the pull rod, and the other end of the third cable is fixed on the end of the cross arm far from the support rod.

[0016] Further preferably, a bracket is fixed at the end of the cross arm far from the support rod, and the upper part of the bracket is fixedly connected to the third cable; the lower part of the bracket is fixedly connected to the bracket fixed at the bottom of the upright column through the fourth cable.

[0017] The present utility model also provides a base for a small rotary sling used for erecting a maintenance scaffolding for a water turbine runner. The bottom of the column is fixedly connected to the central platform of the scaffolding through the base. The center of the base is an installation plate, the bottom of the column is fixed on the installation plate, and the bottom of the base is clamped and fixed on the central platform of the scaffolding.

[0018] The beneficial effects of this technical solution are as follows:

[0019] Since the bottom of the column is fixed to the installation plate at the center of the base, and the bottom of the base is clamped and fixed on the central platform of the scaffolding, the entire rotary sling can be fixed on the central platform of the scaffolding through the setting of the base, and the connection stability can be maintained.

[0020] Preferably, a bottom plate is vertically fixed to the bottom surface of the column. A plurality of reinforcing plates are fixed between the bottom plate and the column. The reinforcing plates are uniformly arranged circumferentially along the bottom of the column, and the bottom plate is fixedly connected to the installation plate.

[0021] Preferably, the base is of an I-shaped structure. Fastening pressure plates are sleeved and fixed at the ends of its four supports. The fastening pressure plates extend downward, and two clamping plates are fixed to the bottom of the fastening pressure plates. The two clamping plates are parallel to the supports, and the panel of the central platform of the scaffolding is clamped and fixed between the two clamping plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present utility model will be described with reference to the drawings, where:

[0023] Figure 1 is a schematic structural diagram of the overall rotary sling of the present utility model;

[0024] Figure 2 is a schematic structural diagram of the overall base of the present utility model.

[0025] Reference numerals: column 1, bottom plate 11, reinforcing plate 12, tie rod 2, first cable 21, second cable 22, third cable 23, fourth cable 24, bracket 25, slewing bearing 3, cross arm 4, support rod 5, hook 51, sling 52, electric winch 53, pulley 54, base 6, installation plate 61, support 62, fastening pressure plate 63, clamping plate 64. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] Embodiment 1: As Figure 1A small rotary sling for the erection of a maintenance bent for a water turbine runner is shown, including a vertically arranged column 1 and a pull rod 2. The heights of the column 1 and the pull rod 2 are 2 m and 1 m respectively. The column 1 is fixed on the central platform of the bent, and the pull rod 2 is fixed above the column 1 through a slewing bearing 3, that is, the outer ring of the slewing bearing 3 is fixedly connected to the top end of the column 1, and the bottom end of the pull rod 2 is fixed in the inner ring of the slewing bearing 3, and the inner ring of the slewing bearing 3 can rotate; a horizontally arranged cross arm 4 is fixed to the lower part of the pull rod 2, and the two are connected to form a cross structure, and the connection part between the two is fixed by bolts. One end of the cross arm 4 is fixedly connected with a support rod 5 in the horizontal direction. A plurality of connection holes are arranged on the body of the support rod 5 along its length direction. Bolts can pass through different connection holes to connect the support rod 5 and the cross arm 4, changing the connection length between the two, and thus changing the overall length after the support rod 5 and the cross arm 4 are fixedly connected. A hook 51 is arranged at the movable end of the support rod 5, and the hook 51 can extend downward to hang the side beam of the bent. Among them, taking the connection part between the cross arm 4 and the pull rod 2 as the demarcation point, the length of the cross arm 4 on the side connected to the support rod 5 is greater than the length of the other side of the cross arm 4.

[0028] In this embodiment, by fixing the column 1 on the central platform of the bent, it is convenient for this sling to lift and then install and lay the side beams of the bent around the lower part of the central platform of the bent; and because the pull rod 2 and the column 1 are fixed together through the slewing bearing 3, on the basis of maintaining a stable connection with the column 1, the pull rod 2 can also rotate itself and cooperate with the cross arm 4 to adjust its extending direction, so that the hook 51 can lift the side beams of the bent in all directions, which is more convenient for on-site construction; and because the cross arm 4 can adjust the connection position with the support rod 5, the connection length between the two can be changed, and thus the overall length of the support rod 5 and the cross arm 4 can be changed. Therefore, the extending length of the support rod 5 can be adjusted according to the position of the installation positioning point of the side beam of the bent, so as to change the lowering position of the hook 51, so that after the hook 51 lifts the side beam of the bent, it can be aligned with the installation positioning place on the central platform of the bent, with more accurate positioning, and can maintain a horizontal state, without affecting the alignment of the bolt installation holes, and the installation is more convenient and efficient, reducing the work intensity of the operators and reducing the safety risks during the operation, and greatly improving the overall erection efficiency of the side beams of the bent.

[0029] Embodiment 2: On the basis of Embodiment 1, an optimized design is carried out on the connection mode of the hook 51. The hook 51 is connected to the electric winch 53 through a sling 52. The electric winch 53 is fixed on the cross arm 4 on the side far from the support rod 5. Since the cross arm 4 takes the connection point with the pull rod 2 as the demarcation point, the length of the cross arm 4 on the side connected to the support rod 5 is greater than the length of the other side of the cross arm 4. Therefore, the electric winch 53 is fixed on the side with a shorter length of the cross arm 4, which increases the balance of the cross arm 4. This kind of setting can better maintain the stability of the cross arm 4 during the hoisting work. Using the electric winch 53 to control the downward length of the hook 51 can greatly save manpower and improve the hoisting efficiency. A pulley 54 is fixed at the movable end of the support rod 5. The sling 52 is released from the electric winch 53, extends along the lengths of the cross arm 4 and the support rod 5, and then bypasses the surface of the pulley 54 and is fixedly connected to the mounting ring of the hook 51. The setting of the pulley 54 makes it more convenient for the electric winch 53 to control the retraction and release of the sling 52.

[0030] Embodiment 3: On the basis of Embodiment 1, an optimized design is carried out on the connection stability of the slewing spreader. A first cable 21 and a second cable 22 are fixed at the top of the pull rod 2. The first cable 21 is fixedly connected to the cross arm 4, and the second cable 22 is fixedly connected to the support rod 5. That is, a connection hole is provided at the top of the pull rod 2. One ends of the first cable 21 and the second cable 22 are respectively fixed in the connection hole through a turnbuckle. Brackets 25 are respectively fixed at the ends of the cross arm 4 and the support rod 5. Connection holes are provided at the tops of the brackets 25. The other ends of the first cable 21 and the second cable 22 are respectively fixedly connected to the connection holes on the brackets 25 of the cross arm 4 and the support rod 5 through turnbuckles.

[0031] Furthermore, one end of a third cable 23 is also fixedly connected to the top of the pull rod 2. The other end of the third cable 23 is fixed on the cross arm 4 at the end far from the support rod 5. Specifically, the connection hole at the top of the pull rod 2 is fixedly connected to the third cable 23 through a turnbuckle. A bracket 25 is fixed at the end of the cross arm 4 far from the support rod 5. Connection holes are respectively provided in the upper part and the lower part of the bracket 25. The bottom end of the third cable 23 is fixed in the connection hole in the upper part of the bracket 25 through a turnbuckle. A fourth cable 24 is fixed in the connection hole of the bracket 25 at the bottom of the column 1 through a turnbuckle at the connection hole in the lower part of the bracket 25.

[0032] Embodiment 4: On the basis of the above embodiments, this embodiment also provides a base for a small slewing spreader used for the erection of a maintenance bent for a hydraulic turbine runner, as Figures 1 to 2As shown in the figure, the bottom of the column 1 is fixedly connected to the center platform of the bent frame through the base 6. An installation plate 61 is fixed at the center of the base 6, and the bottom of the column 1 is fixed on the installation plate 61. The bottom of the base 6 is clamped and fixed on the center platform of the bent frame. Specifically, a bottom plate 11 is vertically fixed at the bottom of the column 1, and the two are integrally formed. Reinforcing plates 12 are evenly fixed circumferentially at the bottom of the column 1. The bottom surface of the reinforcing plate 12 is fixedly connected to the bottom plate 11 of the base 6. The setting of the reinforcing plate 12 increases the connection stability between the column 1 and the bottom plate 11 and also increases the overall load-bearing capacity of the slewing spreader. Among them, the bottom plate 11 is fixedly connected to the installation plate 61. The base 6 is of an I-shaped structure, and the installation plate 61 is of an annular structure. The installation plate 61 is fixed in the inner frame in the middle of the base 6. A number of installation holes are evenly formed in the annular surface of the installation plate 61. Bolts pass through the bottom plate 11 and the installation holes to fix the bottom plate 11 on the installation plate 61, thereby fixing the column 1 on the base 6. At the end of each of the four supports 62 of the base 6, a fastening pressing plate 63 is sleeved and fixed. The top of each fastening pressing plate 63 is sleeved and fixed at the end of the support 62 and is prevented from sliding by a positioning pin fixed on the outside of the support 62. The body of the fastening pressing plate 63 extends vertically downward, and two clamping plates 64 are fixed at the bottom thereof. The clamping plates 64 are parallel to the support 62. The aluminum alloy panel of the center platform of the bent frame is clamped and fixed between the two clamping plates 64. Bolts pass through the clamping plates 64 and the panel of the center platform of the bent frame to firmly connect the two. Thus, through this setting, the base 6 is stably connected to the center platform of the bent frame, and the entire slewing spreader is fixed on the center platform of the bent frame through the base 6.

[0033] The above embodiments only represent the specific implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation to the protection scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the technical solution of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application.

Claims

1. A small rotary sling for the erection of overhaul bent frames of hydraulic turbine runners, characterized in that: It includes a vertically arranged column (1) and a tie rod (2). The column (1) is fixed on the center platform of the bent frame. The tie rod (2) is fixed above the column (1) through a slewing bearing (3). A horizontally arranged cross arm (4) is fixed to the lower part of the tie rod (2). One end of the cross arm (4) is fixedly connected with a support rod (5) in the horizontal direction, and the connection position with the support rod (5) can be adjusted. A hook (51) is provided at the movable end of the support rod (5).

2. The small rotary sling for erecting the overhaul shed of the water turbine runner according to claim 1, wherein: The hook (51) is connected with an electric winch (53) through a sling (52). The electric winch (53) is fixed on the side of the cross arm (4) far from the support rod (5).

3. A small rotary sling for erecting a maintenance shed for a water turbine runner according to claim 2, characterized in that: A pulley (54) is fixed at the movable end of the support rod (5). The sling (52) bypasses the surface of the pulley (54) and is fixedly connected with the hook (51).

4. A small rotary sling for erecting a maintenance bent for a water turbine runner according to claim 1, characterized in that: A first cable (21) and a second cable (22) are fixed to the top end of the tie rod (2). The first cable (21) is fixedly connected with the cross arm (4), and the second cable (22) is fixedly connected with the support rod (5).

5. The small rotary sling for the erection of the overhaul shed of the water turbine runner according to claim 4, characterized in that: Brackets (25) are respectively fixed at the tail ends of the cross arm (4) and the support rod (5). The two brackets (25) are respectively fixedly connected with the first cable (21) and the second cable (22).

6. The small rotary sling for erecting the overhaul bent for the water turbine runner according to claim 4, characterized in that: One end of a third cable (23) is also fixedly connected to the top end of the tie rod (2). The other end of the third cable (23) is fixed on the end of the cross arm (4) far from the support rod (5).

7. A small rotary sling for erecting a maintenance scaffold for a hydraulic turbine runner according to claim 6, characterized in that: A bracket (25) is fixed at the end of the cross arm (4) far from the support rod (5). The upper part of the bracket (25) is fixedly connected with the third cable (23); the lower part of the bracket (25) is fixedly connected with the bracket (25) fixed at the bottom of the column (1) through a fourth cable (24).

8. A base, characterized in that: The base (6) is used for the small slewing hoist for erecting the overhaul bent frame of the water turbine runner described in claim 1. The bottom of the column (1) is fixedly connected with the center platform of the bent frame through the base (6). The center of the base (6) is an installation disk (61). The bottom of the column (1) is fixed on the installation disk (61), and the bottom of the base (6) is clamped and fixed on the center platform of the bent frame.

9. The base according to claim 8, characterized in that: A bottom plate (11) is vertically fixed to the bottom surface of the column (1). A plurality of reinforcing plates (12) are fixed between the bottom plate (11) and the column (1). The reinforcing plates (12) are evenly arranged circumferentially along the bottom of the column (1). The bottom plate (11) is fixedly connected with the installation disk (61).

10. The base according to claim 8, characterized in that: The base (6) is of an I-shaped structure. A fastening pressing plate (63) is sleeved and fixed at the end of each of its four supports (62). The fastening pressing plate (63) extends downward, and two clamping plates (64) are fixed to its bottom. The two clamping plates (64) are parallel to the supports (62). The panel of the center platform of the bent frame is clamped and fixed between the two clamping plates (64).

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