A bottom-up lifting device

Abstract

The application discloses a bottom-up lifting device which is used for lifting a device to be lifted and comprises a lifting tool main body, a lifting lug plate, a lifting point coarse adjustment assembly, a first lifting belt and a second lifting belt. The lifting tool main body is arranged on the top of the device to be lifted, the lifting lug plate is detachably arranged on the bottom of the device to be lifted, and the lifting tool main body and the lifting lug plate are connected through the second lifting belt. The first lifting belts are symmetrically distributed along the gravity center of the lifting tool main body. One end of the first lifting belt is connected with a hoisting device, and the other end is arranged on the side, opposite to the lifting lug plate, of the lifting tool main body through the lifting point coarse adjustment assembly, so that the inclination of the lifting tool main body is adjusted by changing the length of the lifting point coarse adjustment assembly. The bottom-up lifting device is used for ensuring that the device to be lifted is vertically lifted and lowered, and the lifting precision is improved.

Description

Technical Field

[0001] This invention relates to the field of lifting device design and manufacturing technology, and in particular to a bottom-lifting device. Background Technology

[0002] The core support structure of a high-temperature gas-cooled nuclear reactor is one of the key main equipment of the nuclear island. It is mainly used to support and maintain the stability of the reactor core, and is composed of graphite components, carbon components and metal components.

[0003] In the research project on the supercritical power generation scheme of multi-module high-temperature gas-cooled reactor, in order to meet higher technical, economic and life requirements, the core support structure was designed, improved and optimized. After the core support structure was pre-assembled, the core support structure was hoisted into the reactor pressure vessel as a whole.

[0004] However, the pre-assembled core support structure has an outer diameter of 5.52 meters and a height of approximately 20 meters, with a lifting weight of about 800 tons. Furthermore, the sections of the support cylinder are connected by bolts. Due to the excessive weight of the core support structure, if the lifting points are located on the upper side of the structure, there is a risk of damage to the connecting bolts between the support cylinders. In addition, the gap between the core support structure and the reactor pressure vessel is small, only 130 mm, therefore it is essential to ensure that the core support structure remains vertical throughout the process of being lifted into the reactor pressure vessel.

[0005] Therefore, ensuring the vertical lifting and lowering of equipment and improving the accuracy of hoisting are technical problems that need to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a bottom-lifting device to ensure that the equipment to be lifted is lifted vertically and to improve the accuracy of lifting.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A bottom-lifting device for lifting equipment to be lifted includes a lifting body, lifting lugs, a lifting point coarse adjustment assembly, a first lifting strap, and a second lifting strap.

[0009] The main body of the lifting device is set on top of the equipment to be lifted, and the lifting lugs are detachably set on the bottom of the equipment to be lifted. The main body of the lifting device and the lifting lugs are connected by a second lifting strap.

[0010] Multiple first slings are symmetrically distributed along the center of gravity of the main body of the lifting device;

[0011] One end of the first sling is connected to the lifting equipment, and the other end is set on the side of the lifting device body facing away from the lifting lugs via a coarse adjustment component. The tilt of the lifting device body can be adjusted by changing the length of the coarse adjustment component.

[0012] Optionally, in the above-mentioned bottom-lifting device, the lifting device body includes an outer ring, an inner ring, and a connector for connecting the outer ring and the inner ring. The connector is provided with a first lifting lug for connecting to the lifting point coarse adjustment component.

[0013] Optionally, in the aforementioned bottom-lifting device, the coarse adjustment assembly for the lifting point includes a hydraulic cylinder and an electric pump for controlling the hydraulic cylinder, with a one-to-one correspondence between the hydraulic cylinder and the electric pump; and / or,

[0014] The coarse adjustment assembly for the lifting point is connected to the first lifting strap via a shackle.

[0015] One end of the lifting point coarse adjustment assembly is provided with a second lifting lug for connection with the shackle, and the other end is provided with a third lifting lug that is hinged to the first lifting lug.

[0016] Optionally, the above-mentioned bottom-lifting device also includes a lifting point fine-tuning component. The lifting device body has a lifting point adjustment hole, and the lifting point fine-tuning component is installed on the lifting device body through the lifting point adjustment hole. One end of the second lifting strap is connected to the lifting point fine-tuning component.

[0017] Optionally, in the above-mentioned bottom-lifting device, the lifting point fine-tuning component includes an adjusting nut, an adjusting screw, and a bracket;

[0018] The bracket is located at the bottom of the adjusting screw, and the second sling is fitted onto the bracket;

[0019] The adjusting screw passes through the lifting point adjusting hole to engage with the adjusting nut thread, thereby changing the length of the lifting point fine-tuning component.

[0020] Optionally, in the above-mentioned bottom-lifting device, an annular groove with the same center as the lifting point adjustment hole is provided on the outside of the lifting point adjustment hole. The outer diameter of the annular groove is smaller than the diameter of the adjusting nut, and graphite is provided in the annular groove.

[0021] Optionally, in the above-mentioned bottom-lifting device, a pin-type force sensor is provided on the lifting point fine-tuning component, and the pin-type force sensor is interference-fitted with the hanger.

[0022] Optionally, the above-mentioned bottom-lifting device also includes an inclination angle measuring device, which is installed on the equipment to be lifted and is used to measure the inclination of the equipment to be lifted.

[0023] Optionally, the above-mentioned bottom-lifting device also includes an anti-tipping structure, which includes a locking block and a locking assembly. The locking block is engaged with the end of the equipment to be lifted, and the locking assembly is used to lock or unlock the locking block to the equipment to be lifted.

[0024] The block has a through hole, through which the second sling passes to connect with the anti-tipping structure.

[0025] Optionally, in the above-mentioned bottom-lifting device, the locking assembly includes a cam and a handle;

[0026] The cam has positioning pins on both sides, and the locking block has grooves that cooperate with the cam.

[0027] The cam is set in the groove; the handle is connected to the cam and is used to drive the cam to rotate;

[0028] Rotate the handle, and the cam will push the locking block to tighten or loosen the equipment to be lifted.

[0029] Optionally, in the above-mentioned bottom-lifting device, the bottom wing plate of the equipment to be lifted has mounting holes, and the lifting lugs are fixed to the mounting holes by pins.

[0030] The bottom-lifting device provided by the present invention includes a lifting body and a lifting lug plate arranged opposite to each other on both sides of the equipment to be lifted. One side of the lifting body is connected to the lifting lug plate via a second lifting strap, and the other side is connected to the first lifting strap via a lifting point coarse adjustment component to connect with the lifting equipment.

[0031] The length of the coarse adjustment component for the lifting points is adjustable. By changing the length of this component, the difference in elongation of each of the first lifting straps and other lifting deviations can be compensated, and the inclination of the lifting device body can be adjusted to ensure that the equipment to be lifted is in a vertical position, maintains the balance of the equipment to be lifted, and improves the accuracy of lifting. In addition, the lifting points and the equipment to be lifted are mechanically connected, avoiding the process of welding and removing the lifting points, thus improving lifting efficiency. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is an overall structural diagram of the bottom-lifting device disclosed in an embodiment of the present invention;

[0034] Figure 2 This is an enlarged view of A disclosed in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of the lifting device body disclosed in an embodiment of the present invention;

[0036] Figure 4 This is an enlarged view of B disclosed in the embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of the lifting point coarse adjustment component disclosed in an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of the installation of the lifting point fine-tuning component disclosed in an embodiment of the present invention;

[0039] Figure 7 This is a cross-sectional view of the lifting point fine-tuning component disclosed in an embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram of the structure of the suspension point fine-tuning component disclosed in an embodiment of the present invention;

[0041] Figure 9 This is a schematic diagram of the anti-overturning structure disclosed in an embodiment of the present invention;

[0042] Figure 10 This is a schematic diagram of the card block structure disclosed in an embodiment of the present invention;

[0043] Figure 11 This is a top view of the card block disclosed in an embodiment of the present invention;

[0044] Figure 12 This is a schematic diagram of the locking structure disclosed in an embodiment of the present invention;

[0045] Figure 13 This is a schematic diagram of the lifting lug plate disclosed in an embodiment of the present invention;

[0046] Figure 14 This is a schematic diagram of the installation of the lifting lugs disclosed in an embodiment of the present invention;

[0047] Figures 1 to 14 The meanings of the various reference numerals in the attached figures are as follows:

[0048] 100 represents equipment awaiting lifting;

[0049] 200 is the main body of the lifting device; 201 is the outer ring of the lifting device; 202 is the connecting piece; 203 is the inner ring of the lifting device; 204 is the first lifting lug; 205 is the lifting point adjustment hole; 2051 is the annular groove; 210 is the lifting lug plate;

[0050] 300 is the coarse adjustment assembly for the lifting point; 301 is the hydraulic cylinder; 302 is the second lifting lug; 303 is the third lifting lug;

[0051] 400 is a shackle;

[0052] 500 is the first sling;

[0053] 600 is the suspension point fine-tuning component; 601 is the adjusting nut; 602 is the adjusting screw; 603 is the bracket;

[0054] The 700 is a pin-type force sensor;

[0055] 800 is the anti-tipping structure; 801 is the locking block; 8011 is the through hole; 8012 is the groove; 802 is the locking assembly; 8021 is the cam; 8022 is the handle;

[0056] 900 is the second sling. Detailed Implementation

[0057] The following will refer to the appendices in the embodiments of the present invention. Figures 1-14 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without novelty are within the scope of protection of the present invention.

[0058] In the description of this invention, it should be understood that the terms "upper," "lower," "top surface," "bottom surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] like Figure 1 and Figure 2 As shown, the bottom-lifting device disclosed in this invention is used to lift equipment 100 to be lifted, including a lifting body 200, lifting lugs 210, a coarse adjustment component 300, a first sling 500, and a second sling 900. The lifting body 200 is disposed on the top of the equipment 100 to be lifted, and the lifting lugs 210 are detachably disposed on the bottom of the equipment 100 to be lifted. The lifting body 200 and the lifting lugs 210 are connected by the second sling 900. A plurality of first slings 500 are symmetrically distributed along the center of gravity of the lifting body 200. One end of the first sling 500 is connected to the lifting equipment, and the other end is disposed on the side of the lifting body 200 opposite to the lifting lugs 210 by the coarse adjustment component 300, so as to adjust the inclination of the lifting body 200 by changing the length of the coarse adjustment component 300.

[0060] The bottom-lifting device provided by the present invention includes a lifting body 200 and a lifting lug 210 arranged opposite to each other on both sides of the equipment to be lifted 100. One side of the lifting body 200 is connected to the lifting lug 210 via a second lifting strap 900, and the other side is connected to the first lifting strap 500 via a lifting point coarse adjustment component 300, so as to connect with the lifting equipment.

[0061] The length of the coarse adjustment component 300 is adjustable. By changing the length of the coarse adjustment component 300, the difference in elongation of each first lifting strap 500 and other lifting deviations can be compensated, and the inclination of the lifting device body 200 can be adjusted to ensure that the equipment 100 to be lifted is in a vertical state, keeping the equipment 100 to be lifted balanced and improving the accuracy of lifting. In addition, the lifting points are mechanically connected to the equipment 100 to be lifted, avoiding the process of welding and removing the lifting points, thus improving lifting efficiency.

[0062] To facilitate the removal of the lifting lugs 210 after the core support structure has been hoisted into place, such as Figure 13 and Figure 14 As shown, mounting holes are made in the bottom wing plate of the equipment to be lifted 100, and the lifting lug 210 is fixed to the mounting holes by a pin.

[0063] The bottom-lifting device provided by this invention can be used for bottom-lifting of large-diameter, high-height cylindrical bodies in places such as manufacturing workshops and nuclear power plant installation sites. The following uses the reactor core support structure as the equipment to be lifted 100 as an example to further illustrate this invention.

[0064] like Figure 3 and Figure 4 As shown, in one embodiment of the present invention, the lifting device body 200 includes an outer ring 201, an inner ring 203, and a connector 202 for connecting the outer ring 201 and the inner ring 203. The connector 202 is provided with a first lifting lug 204 for connecting with the lifting point coarse adjustment component 300.

[0065] Specifically, the main body of the lifting device 200 can be welded from steel plates and I-beams to ensure sufficient rigidity and prevent deformation of the main body 200 during lifting, which could lead to overturning of the reactor core support structure. Using I-beams as connectors 202 significantly reduces the weight of the lifting device while maintaining its rigidity and load-bearing capacity.

[0066] During the welding process, symmetrical welding is required to avoid welding deformation. Heat treatment for stress relief and correction procedures should be followed to ensure that all lifting points are as close to the same horizontal plane as possible, minimizing deviations. During welding, all contact points of the parts must be fully welded with at least 50mm fillet welds, and post-weld non-destructive testing (MT) should be performed to further improve welding quality and increase the rigidity of the lifting fixture body.

[0067] In practical engineering, the outer ring 201 and the inner ring 203 of the lifting device are set as annular bodies with the same center as the core support structure. The outer diameter of the outer ring 201 of the lifting device can be designed to be larger than the outer diameter of the cylinder of the core support structure, so as to ensure that the lifting point is located on the outside of the cylinder of the core support structure and that there is room for adjustment.

[0068] It should be noted that the first lifting lug 204 is used to connect with the lifting point coarse adjustment assembly 300. To improve the stability of the lifting, the number of first lifting lugs 204 can be set to 4. The weight of the core support structure and the weight of the lifting device body 200 are both applied to the 4 first lifting lugs 204. Therefore, the thickness of the first lifting lug 204 and the distance from the opening to the edge must fully consider the load-bearing capacity.

[0069] To optimize the above technical solution, the lifting point coarse adjustment component 300 includes a hydraulic cylinder 301 and an electric pump for controlling the hydraulic cylinder 301. The hydraulic cylinder 301 and the electric pump are in one-to-one correspondence. The length of the lifting point coarse adjustment component 300 is adjusted by the hydraulic cylinder 301 to ensure that the core support structure is in a vertical state during the lifting process.

[0070] The structure of the coarse adjustment component 300 at the suspension point is as follows: Figure 5 As shown, the coarse adjustment assembly 300 is connected to the first lifting sling 500 via a shackle 400. One end of the coarse adjustment assembly 300 is equipped with a second lifting lug 302 for connection with the shackle 400, and the other end is equipped with a third lifting lug 303 hinged to the first lifting lug 204, achieving a stable connection. It should be noted that the shackle 400 is a standard component with a load capacity of 300 tons. The second lifting lug 302 connected to it needs to be designed according to the specifications and dimensions of the shackle 400 to ensure installation accuracy and strength. Furthermore, the specifications of the first lifting sling 500 need to be customized according to the core support structure and the position of the lifting equipment, ensuring that the angle between the circular sling and the horizontal plane is 60° to 70° during lifting.

[0071] In one embodiment of the present invention, the lifting device body 200 has lifting point adjustment holes 205, and the lifting point fine-tuning component 600 is installed on the lifting device body 200 through the lifting point adjustment holes 205. One end of the second lifting strap 900 is connected to the lifting point fine-tuning component 600. It should be noted that the position of the lifting point adjustment holes 205 must correspond one-to-one with the bottom lifting point position of the core support structure. By changing the length of the lifting point fine-tuning component 600, the difference in elongation of each second lifting strap 900 and other lifting deviations can be effectively compensated, ensuring the core support structure remains vertical with maximum precision.

[0072] The specific structure of the suspension point coarse adjustment component 300 is as follows: Figure 6-8 As shown, the lifting point fine-tuning component 600 includes an adjusting nut 601, an adjusting screw 602, and a bracket 603. The bracket 603 is located at the bottom of the adjusting screw 602. The second lifting strap 900 is fitted onto the bracket 603. The specifications of the bracket 603 are determined according to the specifications of the second lifting strap 900 to ensure that the second lifting strap 900 can pass smoothly.

[0073] The adjusting screw 602 passes through the lifting point adjusting hole 205 to engage with the adjusting nut 601. A position adjusting hole can be provided on the side of the adjusting nut 601. The lever is inserted into the position adjusting hole, and the adjusting nut 601 is rotated to change the length of the lifting point fine-tuning assembly 600. The diameter of the adjusting screw 602 can be calculated based on the total load that each lifting point of the second lifting strap 900 needs to bear.

[0074] To reduce the friction between the adjusting nut 601 and the lifting device body 200, an annular groove 2051 is provided concentrically with the lifting point adjustment hole 205. The width of the annular groove 2051 should be as large as possible without exceeding the width of the adjusting nut 601, and the depth can be selected as 5-10 mm. The annular groove 2051 is filled with graphite. In addition, the surface roughness of the machined surface of the contact area between the lifting device body 200 and the adjusting nut 601 is required to be Ra1.6μm, in order to further reduce the friction between the adjusting nut 601 and the lifting device body 200, and to facilitate the rotation adjustment of the adjusting nut 601 at the position of the adjusting screw 602.

[0075] In one embodiment of the present invention, a pin-type force sensor 700 is provided on the lifting point fine-tuning component 600, and the pin-type force sensor 700 is interference-fitted with the hanger 603. The pin-type force sensor 700 is a standard part and is assembled and used with the lifting point fine-tuning component 600. The second lifting strap 900 is hung on the pin-type force sensor 700. During the lifting process, the pin-type force sensor 700 is subjected to force and can read the force situation of each lifting point. The data can be transmitted to a mobile phone or tablet via Bluetooth to provide data guidance for operators to fine-tune the lifting device.

[0076] Furthermore, the equipment to be lifted 100 is equipped with an inclination measuring device to measure the inclination of the equipment to be lifted 100. The reading of the inclination measuring device can also be transmitted to a mobile phone or tablet via Bluetooth, so as to monitor at all times whether the inclination of the core support structure cylinder is within a controllable range.

[0077] To prevent the cylinder from tilting significantly during bottom lifting, an anti-tipping structure 800 is provided. The anti-tipping structure 800 includes a locking block 801 and a locking assembly. The locking block 801 is engaged with the end of the core support structure, and the locking assembly is used to lock or unlock the locking block 801 to the core support structure. A through hole 8011 is provided on the locking block 801, and the second lifting strap 900 passes through the through hole 8011 to connect with the anti-tipping structure 800.

[0078] The number of anti-tipping structures 800 can be selected from 4 to 8, evenly distributed at the ends of the core support structure. The more structures there are, the better the anti-tipping effect. The locking assembly locks the locking blocks 801 to the core support structure, ensuring that the core support structure rises and falls vertically during lifting without significant tilting. This avoids interference between the core support structure and the reactor pressure vessel, preventing product damage and improving installation accuracy.

[0079] Specifically, such as Figure 9-12 As shown, the locking assembly 802 includes a cam 8021 and a handle 8022; positioning pins for positioning are provided on both sides of the cam 8021, and a groove 8012 is provided on the block 801 to cooperate with the cam 8021 and the positioning pins located on the cam 8021.

[0080] A cam 8021 is positioned within a groove 8012, with one end connected to a handle 8022. Rotating the handle 8022 causes the cam 8021 to rotate within the groove 8012. Due to the eccentric design of the opening in the cam 8021, a stroke difference is created when the handle 8022 rotates. As the handle 8022 rotates, the distance between the positioning pin and the core support cylinder increases. The cam 8021 pushes the locking block 801 against the core support cylinder, achieving a locking effect. When the distance between the positioning pin and the core support cylinder increases, the locking block 801 locks with the equipment 100 to be lifted; when the distance decreases, the locking block 801 unlocks from the equipment 100 to be lifted.

[0081] It is important to note that when the locking block 801 is unlocked from the lifting equipment 100, the cam 8021 and the groove 8012 are fully engaged. The dimensions of the cam 8021 match the dimensions of the locking block 801, ensuring that locking and unlocking of the locking block 801 can be achieved within the stroke difference of the eccentric setting of the cam 8021. Furthermore, the larger the contact area between the cam 8021 and the cylinder of the core support structure, the better the locking effect.

[0082] like Figure 9 This indicates that the locking assembly 802 is in the unlocked state. The locking block 801 releases the equipment 100 to be lifted, and the handle 8022 is rotated downwards. The cam 8021 pushes the locking block 801 against the core support cylinder. At this time, in order to stabilize the position of the handle 8022, a locking seat can be set at the corresponding position of the locking block 801. The handle 8022 engages with the locking seat, so that the locking assembly 802 remains in the locked state.

[0083] The principles of this invention will be described in detail below with reference to specific application scenarios:

[0084] When performing bottom-lifting, firstly, set up the bottom-lifting device according to... Figure 1Once assembled and connected to the core support structure, the anti-tipping device is locked to the cylinder of the core support structure. All lifting points and connection points are checked, and isolation pads are placed at the contact points between the second lifting strap 900 and the cylinder for protection.

[0085] Then, the pin-type force sensor 700 and the tilt measuring device are connected to a mobile phone or tablet, so that the operator can monitor the force at each lifting point and the tilt of the core support structure through the mobile phone or tablet.

[0086] Secondly, the core support structure is slowly lifted using lifting equipment. After the cylinder is off the ground, without moving the vehicle, the data from the pin-type force sensor 700 and the tilt measuring device are observed and analyzed. The first lifting strap 500 and the second lifting strap 900 are fully tensioned. If the cylinder tilts significantly during the lifting process, it is immediately lowered and adjusted. After the readings from the pin-type force sensor 700 and the tilt measuring device stabilize, the lifting frame body 200 is coarsely adjusted using the lifting point coarse adjustment component 300; and each lifting point is finely adjusted using the lifting point fine adjustment component 600 to ensure that the cylinder tilt is within 0.2°.

[0087] Then, the crane moves. During the movement of the crane, the tilt data of the cylinder and the force data of the pin-type force sensor 700 are constantly observed. If any deviation is found, the movement is stopped and adjustments are made in time.

[0088] Finally, after the core support structure is in place and adjusted to meet the requirements, the lifting lug 210 is removed and taken out from the outlet at the bottom of the reactor pressure vessel.

[0089] It should be noted that the bottom-lifting device provided by this invention can be used in the field of lifting device design and manufacturing technology or other fields. Other fields refer to any field other than the field of lifting device design and manufacturing technology. The above is merely an example and does not limit the application areas of the bottom-lifting device provided by this invention.

[0090] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0091] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0092] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A bottom-lifting device for lifting equipment (100) to be lifted, characterized in that, It includes the main body of the lifting device (200), lifting lugs (210), lifting point coarse adjustment assembly (300), first lifting sling (500) and second lifting sling (900); The lifting device body (200) is disposed on the top of the equipment to be lifted (100), and the lifting lug (210) is detachably disposed on the bottom of the equipment to be lifted (100). The lifting device body (200) and the lifting lug (210) are connected by the second lifting strap (900). The plurality of first slings (500) are symmetrically distributed along the center of gravity of the lifting device body (200); One end of the first sling (500) is connected to the lifting equipment, and the other end is set on the side of the lifting body (200) opposite to the lifting lug (210) by the lifting point coarse adjustment component (300) so as to adjust the inclination of the lifting body (200) by changing the length of the lifting point coarse adjustment component (300). The lifting point coarse adjustment assembly (300) is connected to the first sling (500) via a shackle (400); The bottom-lifting device also includes an anti-tipping structure (800), which includes a locking block (801) and a locking assembly (802). The locking block (801) is engaged with the end of the equipment to be lifted (100), and the locking assembly (802) is used to lock or unlock the locking block (801) to the equipment to be lifted (100). The card block (801) has a through hole (8011), and the second sling (900) passes through the through hole (8011) to connect with the anti-overturning structure (800).

2. The bottom-lifting device as described in claim 1, characterized in that, The lifting device body (200) includes an outer ring (201), an inner ring (203), and a connector (202) for connecting the outer ring (201) and the inner ring (203). The connector (202) is provided with a first lifting lug (204) for connecting with the lifting point coarse adjustment assembly (300).

3. The bottom-lifting device as described in claim 2, characterized in that, The coarse adjustment assembly (300) includes a hydraulic cylinder (301) and an electric pump for controlling the hydraulic cylinder (301), wherein the hydraulic cylinder (301) and the electric pump correspond one-to-one; and / or, One end of the lifting point coarse adjustment assembly (300) is provided with a second lifting lug (302) for connecting with the shackle (400), and the other end is provided with a third lifting lug (303) hinged to the first lifting lug (204).

4. The bottom-lifting device as described in any one of claims 1-3, characterized in that, It also includes a lifting point fine-tuning component (600), the lifting body (200) has a lifting point adjustment hole (205), the lifting point fine-tuning component (600) is installed on the lifting body (200) through the lifting point adjustment hole (205), and one end of the second sling (900) is connected to the lifting point fine-tuning component (600).

5. The bottom-lifting device as described in claim 4, characterized in that, The suspension point fine-tuning assembly (600) includes an adjusting nut (601), an adjusting screw (602), and a bracket (603). The bracket (603) is located at the bottom of the adjusting screw (602), and the second sling (900) is sleeved on the bracket (603). The adjusting screw (602) passes through the lifting point adjusting hole (205) to engage with the adjusting nut (601) to change the length of the lifting point fine-tuning component (600).

6. The bottom-lifting device as described in claim 5, characterized in that, An annular groove (2051) with the same center as the lifting point adjustment hole (205) is provided on the outside of the lifting point adjustment hole (205). The outer diameter of the annular groove (2051) is smaller than the diameter of the adjusting nut (601). Graphite is provided in the annular groove (2051).

7. The bottom-lifting device as described in claim 5, characterized in that, The suspension point fine-tuning component (600) is equipped with a pin-type force sensor (700), which is interference-fitted with the bracket (603).

8. The bottom-lifting device as described in claim 1, characterized in that, It also includes an inclination measuring device, which is installed on the equipment to be lifted (100) and is used to measure the inclination of the equipment to be lifted (100).

9. The bottom-lifting device as described in claim 1, characterized in that, The locking assembly (802) includes a cam (8021) and a handle (8022); The cam (8021) is provided with positioning posts on both sides, and the locking block (801) is provided with a groove (8012) that cooperates with the cam (8021). The cam (8021) is disposed in the groove (8012), and the handle (8022) is connected to the cam (8021) to drive the cam (8021) to rotate; Rotating the handle (8022) causes the cam (8021) to push the latch (801) to press or release the equipment (100) to be lifted.

10. The bottom-lifting device as described in claim 1, characterized in that, The bottom wing plate of the equipment to be lifted (100) has a mounting hole, and the lifting lug (210) is fixed to the mounting hole by a pin.

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