CN116332016A - Hoisting device - Google Patents

Abstract

The invention discloses a hoisting device, relates to the technical field of hoisting equipment, and mainly aims to improve leveling precision of an object to be hoisted and improve maintenance efficiency of the object to be hoisted. The main technical scheme of the invention is as follows: the hoisting device comprises at least two slings, wherein the length of each sling is adjustable, and one end of each sling is used for being connected with hoisting equipment; the lifting appliance comprises at least two lifting appliances, wherein each lifting appliance comprises a lifting appliance body and a limiting part arranged on the lifting appliance body, the lifting appliance body or the limiting part is connected with the other end of the lifting rope, the lifting appliance body is used for connecting an object to be lifted, and the limiting part is used for limiting the motion of the object to be lifted relative to the lifting appliance body.

Description

hoisting device

technical field

The invention relates to the technical field of hoisting equipment, in particular to a hoisting device.

Background technique

Pneumatic valves are widely used in various industries such as petrochemical industry and power station. Among them, many large pneumatic actuators need to be disassembled and disassembled in preventive maintenance. Especially in the process of maintenance and construction of power plants, large valve actuators need to be regularly For disassembly inspection, the actuator needs to be hoisted and unloaded from the valve body to the maintenance site. After the maintenance is completed, the actuator needs to be hoisted to the valve body. During the entire process of unloading or hoisting of the valve actuator, the installation of the actuator and the valve core is completed by inserting the connecting shaft of the valve into the connecting groove of the valve actuator.

Traditional valve actuator hoisting and hoisting operations usually use multiple chain hoists to implement the leveling of the actuator. After leveling, all the chain hoists are operated at the same time to lift and install the actuator. It is difficult for multiple chain hoists to move at the same time. Large, so this construction method requires a lot of manpower and working time, and the leveling accuracy of the chain hoist is low.

Contents of the invention

In view of this, an embodiment of the present invention provides a hoisting device, the main purpose of which is to improve the leveling accuracy of the object to be hoisted and to improve the efficiency of inspection of the object to be hoisted.

In order to achieve the above object, the present invention mainly provides the following technical solutions:

In a first aspect, an embodiment of the present invention provides a hoisting device, including:

at least two slings, the length of the slings is adjustable, and one end of the slings is used to connect with the lifting equipment;

At least two slings, the sling includes a sling body and a limiting portion arranged on the sling body, the sling body or the limiting portion is connected to the other end of the sling, the The sling body is used to connect the object to be hoisted, and the limiting part is used to restrict the movement of the object to be sling relative to the sling body.

Further, the spreader body includes a first clamping piece and a second clamping piece opposite to each other, and the first clamping piece and the second clamping piece are detachably connected to clamp the object to be hoisted ;

When the sling is hoisted, the first clamping part is located at the top of the object to be hoisted; the second clamping part is located at the bottom of the object to be hoisted;

The first clamping piece and the second clamping piece include a clamping surface facing the object to be hoisted, at least a first elastic pad is provided on the clamping surface of the second clamping piece, and the clamping The holding surface is used for clamping the object to be hoisted by the third elastic pad.

Further, the number of the slings is at least four;

The limiting part includes two first pressing pieces, the first pressing pieces include pressing surfaces, and the two first pressing pieces are correspondingly rotatably connected to both ends of the second clamping piece ;

At least two of the slings are correspondingly detachably connected to the two first pressing parts of one of the slings, and at least two other slings are correspondingly connected to the two first pressing parts of the other sling. The first pressing member is detachably rotationally connected;

The two first pressing parts are used to move closer to each other when the sling is hoisted, so that the pressing surfaces of the two first pressing parts face each other and compress the object to be hoisted.

Further, the pressing surface is an inclined surface; when the sling is hoisted, the pressing surface is inclined toward the second clamping member.

Further, the first pressing member includes a connected first pressing arm and a second pressing arm, and the first pressing arm and the second pressing arm are arranged opposite to each other;

The pressing surface includes a first pressing surface and a second pressing surface, the first pressing surface is arranged on the first pressing arm, and the second pressing surface is arranged on the second pressing arm. tight arm;

When the sling is hoisted, the first clamping member is located between the first pressing arm and the second pressing arm;

Both the first pressing surface and the second pressing surface are provided with a second elastic pad, and the first pressing surface and the second pressing surface are respectively used to press the second elastic pad. Tighten the parts to be hoisted.

Further, the first clamping part includes a clamping side and a non-clamping side facing away from each other, and the clamping side faces the part to be hoisted;

The limiting part also includes a second pressing part, and the second pressing part includes a pressing end;

The top of the first clamping member is provided with an installation hole passing through the clamping side and the non-clamping side, and the pressing end of the second pressing member passes through the installation hole and is placed on the On the clamping side, the pressing end is used to compress the piece to be hoisted; the length of the second pressing piece protruding into the clamping side can be adjusted.

Further, the mounting hole is a first threaded hole;

The second pressing member is provided with external threads, and the second pressing member is screwed into the installation hole;

The second pressing member includes an adjustment end away from the pressing end, the adjusting end is located on the non-clamping side, and the adjusting end is used to receive an external force so that the second pressing member is opposite to each other. Rotate in the mounting hole to adjust the length of the second pressing member protruding into the clamping side;

The pressing end includes a third pressing surface, and a third elastic pad is arranged on the third pressing surface, and the third pressing surface is used to press the part to be hoisted by the third elastic pad .

Further, the sling includes a sling, a sling and an adjustment piece, the sling is connected to the sling through the adjustment piece, and the length of the adjustment piece is adjustable;

The sling is used to connect with the lifting device, and the sling is connected to the sling body or the limiting part.

Further, the adjusting member includes a first screw, a connecting member and a second screw, and the two ends of the connecting member are correspondingly provided with a second threaded hole and a third threaded hole;

One end of the first screw is threadedly connected to the second threaded hole, and the other end of the first screw is connected to the hanging rope;

One end of the second screw is threadedly connected to the third threaded hole, and the other end of the second screw is connected to the suspension buckle;

The connecting threads of the first screw rod and the second threaded hole are in opposite directions to the connecting threads of the second screw rod and the third threaded hole.

Further, the lifting device also includes:

A suspension ring, the suspension ring is connected to the sling, and the sling is used to be connected to the lifting device through the suspension ring.

By virtue of the above technical solution, the present invention has at least the following beneficial effects:

In the hoisting device provided by the embodiment of the present invention, by setting the sling as an adjustable length sling, and at least two slings can be connected to the two ends of the object to be hoisted, such as a valve actuator, during hoisting and hoisting, at least The length of the two slings is used to adjust the valve actuator to the level. After adjustment, the valve actuator can be lifted and installed. The leveling accuracy of the valve actuator is high, and the operation is simple and convenient, which reduces manpower and improves the valve. The maintenance efficiency of the actuator. Moreover, by setting the limit part, and the limit part can limit the movement of the valve actuator relative to the spreader body, so that the valve actuator is firmly connected to the spreader body, preventing the valve actuator from detaching from the spreader body, thereby ensuring The smooth lifting of the valve actuator is ensured.

Description of drawings

Fig. 1 is the explosion schematic diagram of a kind of hoisting device provided by the embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a hoisting device provided by an embodiment of the present invention;

Fig. 3 is the enlarged schematic diagram of place A in Fig. 2;

FIG. 4 is an enlarged schematic view of point B in FIG. 2 .

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the drawings in the preferred embodiments of the present invention.

As shown in Figure 1 and Figure 2, the embodiment of the present invention provides a hoisting device, which can be used for installation and leveling of pneumatic valve actuators and other mechanisms, and can be used in conjunction with lifting equipment such as cranes or other equipment. The hoisting device includes : at least two slings 1, the length of sling 1 can be adjusted, and one end of sling 1 is used to connect with lifting equipment; at least two slings 2, sling 2 includes the sling body and is arranged on the sling body The limit part, the spreader body or the limit part is connected with the other end of the sling 1, the spreader body is used to connect the object to be hoisted 100, specifically, the object to be hoisted 100 can be a valve actuator; the limit part is used To limit the movement of the object to be hoisted 100 relative to the spreader body.

It can be understood that at least one sling 1 is connected to at least one sling 2, and at least another sling 1 is connected to at least another sling 2. During hoisting, at least two slings 2 can be installed on the object 100 to be hoisted. For example, after the two ends of the valve actuator are hoisted, the levelness of the valve actuator can be measured according to a level measuring tool such as a spirit level, and the length of the sling 1 can be adjusted at the same time until the level of the valve actuator reaches the required value. After the actuator is moved to the installation position, the valve actuator and the valve core 300 can be installed.

Wherein, the sling 1 can be connected with the sling body of the sling 2 to realize the lifting of the valve actuator. For example, the sling body can be a ring structure, the sling 1 can be connected with the sling body, and the limiting part can include A plurality of jaws arranged at intervals around the spreader body and rotatably connected with the spreader body. Before hoisting, the valve actuator is sleeved in the spreader body, and the multiple jaws can be moved from the direction away from the valve actuator. Turn toward the actuator until it reaches the valve actuator and compresses the valve actuator to limit movement of the valve actuator relative to the spreader body.

In the hoisting device provided by the embodiment of the present invention, by setting the sling 1 as a length-adjustable sling 1, and at least two slings 2 can connect the two ends of the object 100 to be hoisted, such as a valve actuator, during hoisting and hoisting , the length of at least two slings 1 can be adjusted to adjust the valve actuator to the level, and then the valve actuator can be lifted and installed after adjustment. Manpower, improve the maintenance efficiency of the valve actuator. Moreover, by setting the limit part, and the limit part can limit the movement of the valve actuator relative to the spreader body, so that the valve actuator is firmly connected to the spreader body, preventing the valve actuator from detaching from the spreader body, thereby ensuring The smooth lifting of the valve actuator is ensured.

In the embodiment of the present invention, referring to Fig. 1 and Fig. 2, the spreader body may include opposite first clamping parts 21 and second clamping parts 22, the first clamping part 21 and the second clamping part 22 are detachable connected to clamp the object to be hoisted 100; when the sling 1 is hoisted, the first clamping part 21 is located at the top of the object to be hoisted 100; the second clamping part 22 is located at the bottom of the object to be hoisted 100.

In the above-mentioned embodiment, by setting the hanger body as the first clamping piece 21 and the second clamping piece 22 which are detachably connected, when installing the valve actuator, the first clamping piece 21 and the second clamping piece 21 can be installed first. The clamping parts 22 are placed on both sides of the valve actuator, and then the first clamping part 21 and the second clamping part 22 are docked to realize the installation of the valve actuator and the spreader body; when disassembling the valve actuator, only The first clamping part 21 and the second clamping part 22 need to be disassembled and separated to realize the separation of the valve actuator from the spreader body. The disassembly and assembly of the two is more convenient and fast, and the maintenance efficiency of the valve actuator is further improved.

Wherein, the detachable connection manners of the first clamping part 21 and the second clamping part 22 may be various, for example, the two are connected by bolts.

Certainly, one end of the first clamping part 21 and the second clamping part 22 may be connected in rotation, and the other end may be detachably connected by means of bolt connection or the like. When in use, the other end of the first clamping part 21 and the second clamping part 22 can be disassembled, and the first clamping part 21 can be rotated to install the object to be hoisted between the two. One clamping part 21, and connecting the other end of the first clamping part 21 and the second clamping part 22, the installation of the spreader body and the object to be hoisted can be realized, which is convenient to use.

It should be noted that, among the first clamping piece 21 and the second clamping piece 22, at least the inner wall surface of the second clamping piece 22 can be adapted to the contour shape of the object to be hoisted 100, and for the cylinder of the valve actuator For objects to be hoisted 100 similar in shape, at least the inner wall surface of the second clamping part 22 can be a circular arc surface, so that the valve actuator can fit more firmly with the spreader body under the action of gravity, and prevent the valve actuator from detaching from the spreader. The main body ensures the smooth lifting of the valve actuator.

In the embodiment of the present invention, referring to FIG. 1, the first clamping part 21 and the second clamping part 22 may include a clamping surface 221 facing the object to be hoisted 100, and at least the clamping surface 221 of the second clamping part 22 is provided There is a first elastic pad 221 , and the clamping surface 221 is used for clamping the object 100 to be hoisted by the first elastic pad 221 .

In the above embodiment, at least the clamping surface 221 of the second clamping member 22 clamps the object to be hoisted 100 through the first elastic pad 221. On the one hand, the first elastic pad 222 can increase the gap between the hanger body and the valve actuator. The frictional force, so that the valve actuator can be firmly attached to the spreader body; on the other hand, the first elastic pad 222 can buffer the external force of the valve actuator, thereby protecting the valve actuator. Avoid damage to the valve actuator. Specifically, the first elastic pad 222 may be a rubber pad.

In the embodiment of the present invention, referring to Fig. 1 and Fig. 2, the number of slings 1 may be at least four; A first pressing part 23 is correspondingly rotatably connected to the two ends of the second clamping part 22; at least two slings 1 are correspondingly detachably connected with two first pressing parts 23 of a sling 2, At least two other slings 1 are correspondingly detachably connected with two first pressing parts 23 of another sling 2; Make the pressing surfaces of the two first pressing parts 23 face each other and press the part to be hoisted.

In the above embodiment, the other ends of the two slings 1 are rotatably connected to the two first pressing parts 23 of the sling 2, and when the slings 1 are hoisted, the two slings 1 are pulled by the lifting device 200 to move against each other. close to pull the two first pressing parts 23 close to each other, so that the pressing surfaces of the two first pressing parts 23 are opposite and press the valve actuator. In this case, the two first pressing parts 23 The clamping force can be applied to the valve actuator in the left and right directions of the valve actuator through their respective pressing surfaces, so that the valve actuator can be more firmly attached to the spreader body under the action of gravity, so as to better avoid the valve actuator It is separated from the spreader body to better ensure the smooth lifting of the valve actuator.

In the above embodiment, the first pressing part 23 is detachably connected to the sling 1, so that the first pressing part 23 can be disassembled and separated from the sling 1 before installing the sling 2 and the valve actuator, so as to avoid The sling 1 affects the installation of the spreader 2 and the valve actuator. After the installation of the first pressing part 23 and the sling 1 is completed, the sling 1 and the first pressing part 23 are assembled and connected to realize valve actuation. The lifting mechanism is more convenient to use.

In the above embodiment, the two first pressing parts 23 can automatically clamp the valve actuator when the sling 1 is hoisted, so as to limit the position of the valve actuator; Release the valve actuator immediately when lifting to remove the limit to the valve actuator. During the whole process, the operator does not need to perform any operation on the first pressing member 23, which is convenient and quick to use, and further improves the maintenance efficiency of the valve actuator.

In the embodiment of the present invention, referring to FIG. 2 and FIG. 4 , the pressing surface of the first pressing member 23 is an inclined surface; when the sling 1 is hoisted, the pressing surface is inclined toward the second clamping member 22 .

In the above embodiment, when the sling 1 is hoisted, the pressing surface is inclined towards the second clamping member 22, so that the pressing surfaces of the two first pressing members 23 can not only move toward the valve actuator when pressing the valve actuator. Applying a clamping force in the left and right directions can also apply a downward clamping force to the valve actuator, so that the valve actuator can fit more firmly with the second clamping member 22 under the action of gravity, further preventing the valve actuator from Separated from the spreader body, it further ensures the smooth lifting of the valve actuator.

It should be noted that the pressing surface can be adapted to the contour shape of the object to be hoisted 100, and for the object to be hoisted 100 similar to the cylindrical shape of the valve actuator, the pressing surface can be a circular arc surface, so that the first The pressing surface 2311 exerts a clamping force on the object to be hoisted 100 through the pressing surface.

In the embodiment of the present invention, referring to FIG. 1 , FIG. 2 and FIG. 4 , the first pressing member 23 may include a first pressing arm 231 and a second pressing arm 232 connected, and the first pressing arm 231 and the second pressing arm 231 The pressing arm 232 is arranged oppositely; the pressing surface may include a first pressing surface 2311 and a second pressing surface 2321, the first pressing surface 2311 is arranged on the first pressing arm 231, and the second pressing surface 2321 is arranged on On the second pressing arm 232 ; when the sling 1 is hoisted, the first clamping member 21 is located between the first pressing arm 231 and the second pressing arm 232 .

In the above embodiment, when the sling 1 is hoisted, the first clamping member 21 is located between the first pressing arm 231 and the second pressing arm 232, that is, the first pressing surface 2311 and the second pressing surface 2321 can apply clamping force to the valve actuator on both sides of the spreader body, which can better prevent the valve actuator from moving axially relative to the spreader body, and further prevent the valve actuator from detaching from the spreader body. It further ensures the smooth hoisting of the valve actuator.

In the embodiment of the present invention, referring to FIG. 1 , FIG. 2 and FIG. 4 , the first pressing surface 2311 and the second pressing surface 2321 can be provided with a second elastic pad 24 , and the first pressing surface 2311 and the second pressing surface The tight surfaces 2321 are respectively used to press the parts to be hoisted by the second elastic pads 24 . On the one hand, the second elastic pad 24 can increase the friction between each pressing surface and the valve actuator, so that the valve actuator and the hanger body can be firmly attached; on the other hand, the second elastic pad 24 It can buffer the external force received by the valve actuator, so as to protect the valve actuator and avoid damage to the valve actuator. Specifically, the second elastic pad 24 may be a rubber pad.

In the embodiment of the present invention, referring to Fig. 1 and Fig. 2, the first clamping part 21 may include a clamping side and a non-clamping side facing away from each other, and the clamping side faces the part to be hoisted; Compression piece 25, this second compression piece 25 comprises compression end 251; The top of first clamping piece 21 is provided with the installation hole 211 that passes through clamping side and non-clamping side, and the compression of second clamping piece 25 The end 251 passes through the installation hole 211 and is placed on the clamping side, and the pressing end 251 is used to compress the object 100 to be hoisted; the length of the second pressing member 25 protruding into the clamping side can be adjusted.

In the above embodiment, by setting the second pressing part 25, and the second pressing part 25 can press the valve actuator on the clamping side of the first clamping part 21, that is, when the sling 1 is hoisted, the second The pressing part 25 can exert a downward force on the valve actuator, which can prevent the valve actuator from being tilted when one side is accidentally subjected to an upward force, thereby preventing the valve actuator from slipping from the spreader body, and further ensuring the safety of the valve. Smooth lifting of the actuator.

In the above-mentioned embodiment, the length of the second pressing member 25 extending into the clamping side can be adjusted, so that not only the pressing force of the second pressing member 25 on the object 100 to be suspended can be adjusted, but also the lifting device can be used for multiple applications. different sizes of objects to be hoisted 100, thereby improving the versatility of the hoisting device.

In the embodiment of the present invention, referring to Fig. 1 and Fig. 2, the aforementioned mounting hole 211 may be a first threaded hole; the second pressing member 25 is provided with external threads, and the second pressing member 25 is threadedly connected in the mounting hole 211 ; The second pressing part 25 includes an adjustment end 252 that is away from the pressing end 251, and the adjustment end 252 is located on the non-clamping side. 211 to adjust the length of the second pressing member 25 protruding into the clamping side.

In the above embodiment, when it is necessary to adjust the pressing force of the second pressing member 25 to the object to be hoisted 100, or to adapt to the size of the object to be hoisted 100, the operator can screw the adjustment end 252, so that the second pressing The member 25 rotates relative to the mounting hole 211, thereby changing the length of the second pressing member 25 protruding into the clamping side. The structure is simple, and the use is reliable and convenient.

Specifically, the second pressing member 25 may include a screw rod 253, a top plate and a holding member, the screw rod 253 is connected between the top plate and the holding member, the screw rod 2253 is provided with the aforementioned external threads, and the top plate forms a pressing end 251 , the handle forms an adjustment end 252 .

In the embodiment of the present invention, referring to FIG. 1, the pressing end 251 of the second pressing member 25 may include a third pressing surface, and a third elastic pad 26 is arranged on the third pressing surface, and the third pressing surface is used for Then press the part to be hoisted by the third elastic pad 26 .

In the above embodiment, by setting the third elastic pad 26, on the one hand, the third elastic pad 26 can increase the friction between the third pressing surface and the valve actuator, so as to better make the valve actuator and the hanger The body fits firmly; on the other hand, the third elastic pad 26 can buffer the external force received by the valve actuator, so as to protect the valve actuator and avoid damage to the valve actuator. Specifically, the third elastic pad 26 may be a rubber pad.

In the embodiment of the present invention, referring to Fig. 1 and Fig. 2, the sling 1 may include a suspension rope 11, a suspension buckle 12 and an adjustment member 13, the suspension rope 11 is connected with the suspension buckle 12 through the adjustment member 13, and the length of the adjustment member 13 is adjustable; The rope 11 is used to connect with the lifting device 200, and the hoisting buckle 12 is connected with the spreader body or the limit part. Wherein, the length of the adjusting member 13 can be adjusted, so that the length of the sling 1 can be adjusted.

It can be understood that the number of hanging buckles 12 can be two, one hanging buckle 12 is connected with the end of the hanging rope 11, so that the hanging rope 11 is connected with the lifting device 200 through the hanging buckle 12, and the adjusting member 13 is connected with the other hanging buckle 12 It is detachably connected in rotation with the first pressing member 23 .

In the embodiment of the present invention, referring to FIG. 2 and FIG. 3 , the adjusting member 13 may include a first screw 131, a connecting member 132 and a second screw 133, and the two ends of the connecting member 132 are respectively provided with a second threaded hole and a third threaded hole. Threaded hole; one end of the first screw rod 131 is threadedly connected with the second threaded hole, and the other end of the first screw rod 131 is connected with the first hanging rope 11; one end of the second screw rod 133 is threadedly connected with the third threaded hole, and the second screw rod 133 The other end of the second screw rod 133 is connected to the hanging buckle 12; the direction of the connecting thread of the first screw rod 131 and the second threaded hole is opposite to that of the connecting thread of the second screw rod 133 and the third threaded hole.

In the above embodiment, when the length of the sling 1 needs to be adjusted, the connecting member 132 can be screwed to change the length of the adjusting member 13, thereby changing the length of the sling 1. The structure is simple, reliable and convenient to use.

In the embodiment of the present invention, referring to FIG. 1 and FIG. 2 , the hoisting device may further include a hoisting ring 3 connected to a sling 1 , and the sling 1 is used to connect to a lifting device 200 through the hoisting ring 3 . Specifically, the lifting ring 3 can be connected with the first lifting rope 11 through the first hanging buckle 14, and the lifting ring 3 can be used to connect with the hook of the lifting device 200, so that when the lifting device 200 is started, the lifting device 200 can be lifted by the lifting rope 1. Tool 2 and object 100 to be hoisted are hoisted.

The method of using the hoisting device will be described below by taking the object to be hoisted 100 as a valve actuator as an example. First, the first clamping piece 21 and the second clamping piece 22 are docked and installed at both ends of the valve actuator; then the adjusting end 252 of the first pressing piece 23 is tightened to compress the valve actuator; The adjustment parts 13 are firmly connected without jamming; then at least four slings 1 are respectively connected to the four first pressing parts 23 of at least two slings 2; the lifting device 200 is started to lift the valve actuator , after hoisting, the levelness of the valve actuator can be measured according to a horizontal measuring tool such as a spirit level, and the length of each sling 1 can be adjusted at the same time until the levelness of the valve actuator reaches the required value, so as to realize the leveling of the valve actuator; The actuator moves to the installation position, and the lifting device 200 descends to install the valve actuator and the valve core 300 .

Of course, when the valve actuator is disassembled, the installation steps of the lifting device and the valve actuator described above can also be adopted, and the length of each sling 1 can be adjusted so that each sling 1 is tightened, and then the lifting device 200 can be started. Carry out lifting to ensure the level of the valve actuator.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. A hoisting device, characterized in that, comprising: at least two slings, the length of the slings is adjustable, and one end of the slings is used to connect with the lifting equipment; At least two slings, the sling includes a sling body and a limiting portion arranged on the sling body, the sling body or the limiting portion is connected to the other end of the sling, the The sling body is used to connect the object to be hoisted, and the limiting part is used to restrict the movement of the object to be sling relative to the sling body. 2. The lifting device according to claim 1, characterized in that, The spreader body includes a first clamping part and a second clamping part opposite to each other, and the first clamping part and the second clamping part are detachably connected to clamp the object to be hoisted; When the sling is hoisted, the first clamping part is located at the top of the object to be hoisted; the second clamping part is located at the bottom of the object to be hoisted; The first clamping piece and the second clamping piece include a clamping surface facing the object to be hoisted, at least a first elastic pad is provided on the clamping surface of the second clamping piece, and the clamping The holding surface is used for clamping the object to be hoisted by the third elastic pad. 3. The lifting device according to claim 2, characterized in that, the number of said slings is at least four; The limiting part includes two first pressing pieces, the first pressing pieces include pressing surfaces, and the two first pressing pieces are correspondingly rotatably connected to both ends of the second clamping piece ; At least two of the slings are correspondingly detachably connected to the two first pressing parts of one of the slings, and at least two other slings are correspondingly connected to the two first pressing parts of the other sling. The first pressing member is detachably rotationally connected; The two first pressing parts are used to move closer to each other when the sling is hoisted, so that the pressing surfaces of the two first pressing parts face each other and compress the object to be hoisted. 4. The lifting device according to claim 3, characterized in that, The pressing surface is an inclined surface; when the sling is hoisted, the pressing surface is inclined toward the second clamping member. 5. The lifting device according to claim 3, characterized in that, The first pressing member includes a connected first pressing arm and a second pressing arm, and the first pressing arm and the second pressing arm are oppositely arranged; The pressing surface includes a first pressing surface and a second pressing surface, the first pressing surface is arranged on the first pressing arm, and the second pressing surface is arranged on the second pressing arm. tight arm; When the sling is hoisted, the first clamping member is located between the first pressing arm and the second pressing arm; Both the first pressing surface and the second pressing surface are provided with a second elastic pad, and the first pressing surface and the second pressing surface are respectively used to press the second elastic pad. Tighten the parts to be hoisted. 6. The lifting device according to claim 2, characterized in that, The first clamping part includes a clamping side and a non-clamping side facing away from each other, and the clamping side faces the part to be hoisted; The limiting part also includes a second pressing part, and the second pressing part includes a pressing end; The top of the first clamping member is provided with an installation hole passing through the clamping side and the non-clamping side, and the pressing end of the second pressing member passes through the installation hole and is placed on the On the clamping side, the pressing end is used to compress the piece to be hoisted; the length of the second pressing piece protruding into the clamping side can be adjusted. 7. The lifting device according to claim 6, characterized in that, The mounting hole is a first threaded hole; The second pressing member is provided with external threads, and the second pressing member is screwed into the installation hole; The second pressing member includes an adjustment end away from the pressing end, the adjusting end is located on the non-clamping side, and the adjusting end is used to receive an external force so that the second pressing member is opposite to each other. Rotate in the mounting hole to adjust the length of the second pressing member protruding into the clamping side; The pressing end includes a third pressing surface, and a third elastic pad is arranged on the third pressing surface, and the third pressing surface is used to press the part to be hoisted by the third elastic pad . 8. The lifting device according to claim 1, characterized in that, The sling includes a sling, a sling and an adjustment piece, the sling is connected to the sling through the adjustment piece, and the length of the adjustment piece is adjustable; The sling is used to connect with the lifting device, and the sling is connected to the sling body or the limiting part. 9. The lifting device according to claim 8, characterized in that, The adjusting member includes a first screw, a connecting member and a second screw, and the two ends of the connecting member are correspondingly provided with a second threaded hole and a third threaded hole; One end of the first screw is threadedly connected to the second threaded hole, and the other end of the first screw is connected to the hanging rope; One end of the second screw is threadedly connected to the third threaded hole, and the other end of the second screw is connected to the suspension buckle; The connecting threads of the first screw rod and the second threaded hole are in opposite directions to the connecting threads of the second screw rod and the third threaded hole. 10. The lifting device according to claim 1, further comprising: A suspension ring, the suspension ring is connected to the sling, and the sling is used to be connected to the lifting device through the suspension ring.

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