Hoisting mechanism with anti-falling function

Abstract

The utility model discloses a hoist mechanism with prevent falling function, including the turnover frame of L shape, one end of turnover frame is rotatably connected with the rotary frame, and the other end of turnover frame is equipped with the support seat, and the support seat is used for lifting the turnover frame, and the both sides of turnover frame are connected with symmetrical clamping assembly, clamping assembly includes the swing arm of turnover frame through pivot rotation connection, and the middle part of pivot is connected with hand wheel through worm transmission mechanism, and the middle part of swing arm is slidably connected with the clamping seat of linear guide rail, and the middle part of clamping seat is slidably connected with telescopic link of sliding slot, and one end of telescopic link extends to the outside of clamping seat and is rotatably connected with the clamping plate, and the first compression spring is connected with each other between telescopic link and clamping seat, and the outer end of swing arm is detachably connected with the baffle of L shape, and the length direction of swing arm forms interval between baffle and clamping plate. The utility model can improve the installation efficiency of water turbine accessory and the safety of water turbine accessory in the installation process.

Description

Technical Field

[0001] This utility model relates to a water turbine installation device, and in particular to a hoisting mechanism with anti-fall function. Background Technology

[0002] Due to the relatively large size and weight of some turbine accessories, they need to be stored horizontally on the ground during initial storage to prevent them from tipping over and being damaged. During later installation, the turbine accessories need to be rotated from a horizontal to a vertical position to facilitate the installation of lifting tools. Then, using a crane and lifting tools, the turbine accessories can be vertically lifted into the installation location. Currently, the method for tilting and lifting turbine accessories involves first installing a tilting frame at one end of the accessory. Then, a crane pulls the frame, rotating the accessory to a vertical position. Workers then install the lifting tools onto the accessory. Finally, the crane's lifting position is changed from the frame to the lifting tools, thus achieving its lifting function.

[0003] However, the above-mentioned operating method has several drawbacks. First, due to the limited number of overhead cranes available at the installation site, and the fact that a single overturning and hoisting operation of the turbine accessories requires prolonged use of these cranes, the installation site is forced to queue for crane use, significantly reducing the efficiency of turbine installation. Second, the size limitations of the turbine accessories make them prone to swaying, tilting, or falling during overturning, installing hoisting tools, and changing hoisting positions, posing significant safety hazards. Workers must also exercise extreme caution throughout the operation to avoid being injured by falling turbine accessories.

[0004] Therefore, existing turbine accessories suffer from low installation efficiency and poor safety during installation. Utility Model Content

[0005] The purpose of this invention is to provide a lifting mechanism with anti-fall function. It can improve the installation efficiency of turbine accessories and the safety of turbine accessories during the installation process.

[0006] The technical solution of this utility model: a hoisting mechanism with anti-fall function, including an L-shaped tilting frame, one end of which is rotatably connected to a rotating frame, and the other end of which is provided with a support seat for supporting the tilting frame. Symmetrical clamping assemblies are connected to both sides of the tilting frame. The clamping assembly includes a swing arm rotatably connected to the tilting frame via a rotating shaft. A handwheel is connected to the middle of the rotating shaft via a worm gear transmission mechanism. A clamping seat is slidably connected to the middle of the swing arm via a linear guide rail. A telescopic rod is slidably connected to the middle of the clamping seat via a sliding groove. One end of the telescopic rod extends to the outside of the clamping seat and is rotatably connected to a clamping plate. The telescopic rod and the clamping seat are connected to each other via a first compression spring. An L-shaped baffle is detachably connected to the outer end of the swing arm. A gap is formed between the baffle and the clamping plate along the length direction of the swing arm.

[0007] In the aforementioned lifting mechanism with anti-fall function, there are two rotating frames symmetrically arranged on both sides of the tilting frame. Between the two rotating frames, there is a first fixed frame and a second fixed frame located below the tilting frame. The first fixed frame is fixedly connected to the ground and is used to limit the clockwise rotation direction of the tilting frame in the vertical state. The second fixed frame is rotatably connected to the rotating frame and is used to limit the counterclockwise rotation direction of the tilting frame in the vertical state. The tilting frame has clamping plates on both sides that cooperate with the second fixed frame.

[0008] In the aforementioned lifting mechanism with anti-fall function, the clamping seat includes a first support and a second support. The middle part of the second support is connected to a telescopic rod. A limiting groove is formed between the first support and the second support. A limiting sleeve that is fixedly connected to the first support is provided in the limiting groove. The limiting sleeve is used to limit the rear end of the telescopic rod.

[0009] In the aforementioned lifting mechanism with anti-fall function, the first support and the second support are connected to each other around their perimeter by bolts, and a spacer sleeve located between the first support and the second support is fitted in the middle of the bolts.

[0010] In the aforementioned lifting mechanism with anti-fall function, the inner end of the clamping plate is detachably connected to a pin, and the end of the telescopic rod is provided with a sleeve rotatably connected to the outside of the pin.

[0011] In the aforementioned lifting mechanism with anti-fall function, the telescopic rod has an inner hole in the middle, and a positioning rod is slidably connected in the inner hole. One end of the positioning rod forms a pin, and the other end of the positioning rod extends to the outside of the telescopic rod and forms a pressing part. A second compression spring is provided on the outside of the pressing part and located inside the limiting sleeve. Multiple slots for the pin are distributed in a ring around the pin shaft. The middle of the sleeve has a socket for the pin to pass through. A reaction spring is provided between the sleeve and the positioning rod and sleeved outside the pin.

[0012] In the aforementioned lifting mechanism with anti-fall function, the pressing part is a top rod screw threaded to the end of the positioning rod.

[0013] Compared with the prior art, this utility model has the following characteristics:

[0014] (1) This utility model, through the structural cooperation of the tilting frame, swing arm and clamping assembly, enables the operator to first place the turbine accessories horizontally on the tilting frame, then rotate the swing arms on both sides to clamp and limit the turbine accessories; then the lifting equipment pulls the tilting frame to realize the tilting function of the turbine accessories; finally, the first fixed frame and the second fixed frame are used to fix the tilting frame in the vertical state, which makes it convenient for the operator to install the lifting tools on the turbine accessories; under the above cooperation, the operator does not need to use the crane or other lifting equipment to lift the turbine accessories when installing the lifting tools, and can ensure the stability of the turbine accessories in the vertical state, avoid the possibility of the turbine accessories shaking, tilting or falling due to external force during the installation process, and improve the safety of the turbine accessories during the installation process;

[0015] (2) By limiting the structure of the clamping assembly, the clamping assembly can clamp the turbine accessories through the cooperation of the clamping plate, the telescopic rod and the first compression spring during the clamping process. On the one hand, the elastic force of the first compression spring can make the clamping assembly continuously press the turbine accessories after clamping, preventing the possibility of the turbine accessories slipping out; on the other hand, it can also prevent the swing arm from forming a hard squeeze on the turbine accessories, causing the turbine accessories to be damaged by force, thus improving the clamping and limiting effect of the turbine accessories; at the same time, by rotating the clamping plate to the telescopic rod, the clamping plate can also rotate in accordance with the shape of the turbine accessories, thereby improving the fit stability between the clamping plate and the turbine accessories.

[0016] (3) Through the structural cooperation of positioning rod, pin, second compression spring and reaction spring, when the telescopic rod is retracted to the designated position with the clamping of the swing arm, the second compression spring can push the positioning rod so that the pin is engaged in the slot on the surface of the pin or pressed tightly on the surface of the pin, thereby limiting the angle of the clamping plate after it is clamped in place, preventing the possibility of the turbine accessory being squeezed open by external force during subsequent operation and causing it to fall, further improving the clamping stability of this utility model;

[0017] Therefore, this utility model can improve the installation efficiency of turbine accessories and the safety of turbine accessories during the installation process. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the hoisting mechanism in a horizontal position;

[0019] Figure 2 This is a structural diagram of the hoisting mechanism in a vertical position;

[0020] Figure 3 A schematic diagram of the clamping assembly in its natural state;

[0021] Figure 4 yes Figure 3 A magnified view from direction A;

[0022] Figure 5 This is a schematic diagram of the clamping assembly after clamping;

[0023] Figure 6 This is a schematic diagram of the hoisting mechanism when the turbine accessories are rotated to an inclined state;

[0024] Figure 7 yes Figure 2 View from direction B;

[0025] Figure 8 yes Figure 6 The C-direction view.

[0026] The markings in the attached diagram are as follows: 1-Flipping frame, 2-Rotating frame, 3-Support base, 4-Rotating shaft, 5-Swing arm, 6-Handwheel, 7-Clamping base, 8-Telescopic rod, 9-Clamping plate, 10-First compression spring, 11-Baffle, 12-First fixed frame, 13-Second fixed frame, 14-Limiting sleeve, 15-Spacer sleeve, 16-Pin, 17-Sleeve, 18-Positioning rod, 19-Second compression spring, 20-Reaction spring, 21-Indicator line, 101-Clamping plate, 701-First support, 702-Second support, 161-Slot, 181-Pin, 182-Extrusion part. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0028] Example. A lifting mechanism with anti-fall function is configured as follows: Figure 1As shown, it includes an L-shaped tilting frame 1, which is assembled from structural steel. One end of the tilting frame 1 is rotatably connected to a rotating frame 2 via a bearing, and the other end of the tilting frame 1 is provided with a support base 3. The support base 3 is located below the tilting frame 1 and is used to support the tilting frame 1. The top of the tilting frame 1 above the support base 3 is provided with a hook for hoisting. Symmetrical clamping assemblies are connected to both sides of the tilting frame 1. The clamping assembly includes a swing arm 5 rotatably connected to the tilting frame 1 via a rotating shaft 4. The middle of the rotating shaft 4 is fixedly connected to the swing arm 5, and both ends of the rotating shaft 4 are rotatably connected to the tilting frame 1. The middle part of the swing arm 5 is connected to a handwheel 6 via a worm gear transmission mechanism. The middle part of the swing arm 5 is slidably connected to a clamping seat 7 via a linear guide rail. Both ends of the linear guide rail are provided with stops to limit the clamping seat 7. The middle part of the clamping seat 7 is slidably connected to a telescopic rod 8 via a slide groove. One end of the telescopic rod 8 extends to the outside of the clamping seat 7 and is rotatably connected to a clamping plate 9. The surface of the clamping plate 9 is covered with a rubber plate. The telescopic rod 8 and the clamping seat 7 are connected to each other via a first compression spring 10. The outer end of the swing arm 5 is screwed to an L-shaped baffle 11. The baffle 11 and the clamping plate 9 are spaced apart along the length of the swing arm 5.

[0029] The telescopic rod 8 has an indicator line 21 on its side wall. When the indicator line 21 is located outside the clamping seat 7, it indicates that the clamping force of the clamping plate 9 is insufficient. The operator needs to rotate the swing arm 5 to hide the indicator line 21 inside the clamping seat 7.

[0030] The worm gear transmission mechanism includes a turbine connected to the rotating shaft 4, a worm connected to the upper end of the turbine, a worm rotatably connected to the swing arm 5, and one end of the worm extending to the outside of the swing arm 5 and connected to the handwheel 6; the operator can drive the swing arm 5 to rotate through the handwheel 6.

[0031] The rotating frame 2 consists of two symmetrically arranged on both sides of the flipping frame 1. Between the two rotating frames 2, there is a first fixed frame 12 and a second fixed frame 13 located below the flipping frame 1. The first fixed frame 12 is fixedly connected to the ground and is used to limit the clockwise rotation direction of the flipping frame 1 in the vertical state. The second fixed frame 13 is rotatably connected to the rotating frame 2 and is used to limit the counterclockwise rotation direction of the flipping frame 1 in the vertical state. After the second fixed frame 13 is rotated into position, it can be inserted and fixed to the rotating frame 2 through a pin. The flipping frame 1 has a clamping plate 101 on both sides that cooperates with the second fixed frame 13. The operator can rotate the second fixed frame 13 to separate it from or attach it to the clamping plate 101.

[0032] The clamping base 7 includes a first support 701 and a second support 702. The telescopic rod 8 is connected to the middle of the second support 702. A limiting groove is formed between the first support 701 and the second support 702. A limiting sleeve 14 is fixedly connected to the first support 701 in the limiting groove. The limiting sleeve 14 is used to limit the rear end of the telescopic rod 8.

[0033] The first support 701 and the second support 702 are connected to each other by bolts. A spacer 15 is fitted in the middle of the bolts between the first support 701 and the second support 702. During installation, the operator can adjust the distance between the first support 701 and the second support 702 by replacing the spacer 15 or adding or removing shims.

[0034] The inner end of the clamping plate 9 is detachably connected to a pin 16, and a transmission connection is formed between the pin 16 and the clamping plate 9. The end of the telescopic rod 8 is provided with a sleeve 17 rotatably connected to the outside of the pin 16, and the sleeve 17 and the telescopic rod 8 are welded together.

[0035] The telescopic rod 8 has an inner hole in the middle, and a positioning rod 18 is slidably connected in the inner hole. One end of the positioning rod 18 forms a pin 181, and the other end of the positioning rod 18 extends to the outside of the telescopic rod 8 and forms a pressing part 182. A second compression spring 19 is provided on the outside of the pressing part 182, located inside the limiting sleeve 14. One end of the second compression spring 19 is fixedly connected to the first support 701. The pin 16 has a plurality of slots 161 arranged in a ring around it to mate with the pin 181. The sleeve 17 has a socket in the middle for the pin 181 to pass through. A reaction spring 20 is provided between the sleeve 17 and the positioning rod 18, which is sleeved on the outside of the pin 181. The elastic force of the reaction spring 20 is less than that of the second compression spring 19.

[0036] The pressing part 182 is a push rod screw threaded to the end of the positioning rod 18. The operator can adjust its extension length by rotating the push rod screw.

[0037] In this embodiment, during use, operators first use forklifts or other handling equipment to lift the turbine attachment, which is lying flat on the ground, and place it on the horizontal tilting frame 1. After the turbine attachment is in place, the operator turns the handwheel 6 to control the swing arm 5 to rotate inward, and uses the clamping assembly to clamp the two side walls of the turbine attachment, thereby preventing the turbine attachment from sliding or shifting during subsequent operations. After the swing arm 5 has rotated to its position, the self-locking function of the worm gear transmission mechanism can limit the angle of the swing arm 5, preventing the swing arm 5 from flipping outward during subsequent use.

[0038] During the clamping process, the clamping plate 9 first contacts the side wall of the turbine accessory as the swing arm 5 rotates. Then, it rotates due to the subsequent rotation of the swing arm 5, causing the clamping plate 9 to fully adhere to the side wall of the turbine accessory after rotation. After the clamping plate 9 is fully adhered to the side wall of the turbine accessory, the swing arm 5 continues to drive the clamping plate 9 to press inward, and the telescopic rod 8 retracts inward under the action of this pressing force, overcoming the elastic force of the first compression spring 10, until the end of the telescopic rod 8 adheres to the limiting sleeve 14. When the telescopic rod 8 adheres to the limiting sleeve 14, it indicates that the first compression spring 10 is in a compressed state and can apply a stable pressing force to the turbine accessory, thereby ensuring the clamping stability of the clamping plate 9 for the turbine accessory in subsequent operations.

[0039] In its natural state, the positioning rod 18 is separated from the pin 16, allowing the clamping plate 9 and the pin 16 to rotate freely on the sleeve 17. When the telescopic rod 8 is retracted, the pressing part 182 at one end of the positioning rod 18 comes into contact with the second compression spring 19, and is obstructed by the second compression spring 19, causing the positioning rod 18 to slide relative to the telescopic rod 8 as it retracts. At the same time, the pin 181 at the other end of the positioning rod 18 is inserted into the slot 161 of the pin 16, thereby limiting the rotation of the clamping plate 9 after it is clamped in place, preventing the clamping plate 9 from rotating under force during subsequent operations, and releasing the clamping limit on the turbine accessories, ensuring its clamping stability. When the clamping plate 9 is in the clamping position, the pin 181 and the slot 161 are misaligned. The positioning rod 18 is obstructed by the pin 16, which causes the second compression spring 19 to retract and apply a continuous compressive force to the positioning rod 18. Then, when the clamping plate 9 rotates to match the pin 181 and the slot 161 during subsequent use, the second compression spring 19 pushes the positioning rod 18 to achieve the insertion and limiting function.

[0040] After the swing arm 5 rotates to its position, a crane or other hoisting equipment pulls the end of the tilting frame 1 via a hook, causing the tilting frame 1 to rotate from a horizontal to a vertical position under the traction, thereby achieving the tilting of the turbine accessory. After the tilting frame 1 is tilted and in contact with the first fixed frame 12, the operator rotates the second fixed frame 13 until it engages with the clamping plate 101. This utilizes the cooperation of the first fixed frame 12 and the second fixed frame 13 to limit the rotation angle of the tilting frame 1 in the vertical position, preventing the tilting frame 1 from accidentally tipping over during subsequent operations.

[0041] After the tilting frame 1 is fixed, the operators can install the hoisting tools on the outside of the turbine accessories in a vertical position. Then, by using the crane and hoisting tools together, the turbine accessories are lifted and transported to the hoisting position. This prevents the turbine accessories from shaking during the installation of the hoisting tools and avoids accidental tipping over during the hoisting process, thus improving operational safety.

[0042] When lifting tools such as rigging need to be installed on the rear side of the turbine attachments, operators can also apply a horizontal traction force to the upper end of the turbine attachments using lifting equipment such as overhead cranes. This causes the turbine attachments to rotate from a vertical position to an outward tilting position under the traction force. Figure 6 and Figure 8 As shown, a gap is formed between the back of the turbine attachment and the tilting frame 1, facilitating installation by operators. During the tilting process, the operator adjusts the rotation angle of the swing arm 5 to prevent the telescopic rod 8 from obstructing the rotation of the turbine attachment after it is fully retracted, and also to prevent the telescopic rod 8 from gradually extending outwards until the indicator line 21 is exposed outside the second support 702, ensuring stable compression of the turbine attachment by the clamping plate 9. During the tilting process, the clamping assembly further compresses and limits the angle of the turbine attachment, preventing slippage, lateral displacement, or direct tipping, thus improving operator safety.

[0043] If the lifting tool is too large to be installed on the rear side of the tilted turbine attachment, the operator can first lift the turbine attachment off the clamping assembly and use the tilting frame 1 to temporarily attach the turbine attachment, and then complete the installation of the remaining lifting tools.

Claims

1. A hoisting mechanism with anti-fall function, characterized in that: The device includes an L-shaped tilting frame (1), with a rotating frame (2) rotatably connected to one end of the tilting frame (1) and a support base (3) at the other end. The support base (3) is used to lift the tilting frame (1). Symmetrical clamping assemblies are connected to both sides of the tilting frame (1). The clamping assembly includes a swing arm (5) rotatably connected to the tilting frame (1) via a rotating shaft (4). A handwheel (6) is connected to the middle of the rotating shaft (4) via a worm gear transmission mechanism. The middle of the swing arm (5) is connected to the handwheel (6). A clamping seat (7) is slidably connected to a linear guide rail. A telescopic rod (8) is slidably connected to the middle of the clamping seat (7) via a slide groove. One end of the telescopic rod (8) extends to the outside of the clamping seat (7) and is rotatably connected to a clamping plate (9). The telescopic rod (8) and the clamping seat (7) are connected to each other via a first compression spring (10). An L-shaped baffle (11) is detachably connected to the outer end of the swing arm (5). A gap is formed between the baffle (11) and the clamping plate (9) along the length direction of the swing arm (5).

2. The hoisting mechanism with anti-fall function according to claim 1, characterized in that: The number of rotating frames (2) is two and they are symmetrically arranged on both sides of the flipping frame (1). Between the two rotating frames (2), there is a first fixed frame (12) and a second fixed frame (13) located below the flipping frame (1). The first fixed frame (12) is fixedly connected to the ground and is used to limit the clockwise rotation direction of the flipping frame (1) in the vertical state. The second fixed frame (13) is rotatably connected to the rotating frame (2) and is used to limit the counterclockwise rotation direction of the flipping frame (1) in the vertical state. The flipping frame (1) is provided with a clamping plate (101) on both sides to cooperate with the second fixed frame (13).

3. The hoisting mechanism with anti-fall function according to claim 1, characterized in that: The clamping base (7) includes a first support (701) and a second support (702). The telescopic rod (8) is connected to the middle of the second support (702). A limiting groove is formed between the first support (701) and the second support (702). A limiting sleeve (14) is fixedly connected to the first support (701) in the limiting groove. The limiting sleeve (14) is used to limit the rear end of the telescopic rod (8).

4. The hoisting mechanism with anti-fall function according to claim 3, characterized in that: The first support (701) and the second support (702) are connected to each other by bolts, and a spacer (15) is fitted in the middle of the bolts between the first support (701) and the second support (702).

5. The hoisting mechanism with anti-fall function according to claim 3, characterized in that: The inner end of the clamp (9) is detachably connected to a pin (16), and the end of the telescopic rod (8) is provided with a sleeve (17) rotatably connected to the outside of the pin (16).

6. The hoisting mechanism with anti-fall function according to claim 5, characterized in that: The telescopic rod (8) has an inner hole in the middle, and a positioning rod (18) is slidably connected in the inner hole. One end of the positioning rod (18) forms a pin (181), and the other end of the positioning rod (18) extends to the outside of the telescopic rod (8) and forms a pressing part (182). A second compression spring (19) located inside the limiting sleeve (14) is provided on the outside of the pressing part (182). The pin (16) has a plurality of slots (161) arranged in a ring around it to cooperate with the pin (181). The sleeve (17) has a socket in the middle for the pin (181) to pass through. A reaction spring (20) sleeved on the outside of the pin (181) is provided between the sleeve (17) and the positioning rod (18).

7. The hoisting mechanism with anti-fall function according to claim 6, characterized in that: The pressing part (182) is a push rod screw threaded to the end of the positioning rod (18).

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