Internal support type lifting appliance for vertically transporting hard rock in subway shaft

Abstract

The utility model relates to a lifting appliance, in particular to an inner supporting type lifting appliance for vertically transporting hard rocks in a shaft of a subway, which comprises an outer cylinder, an inner supporting shaft and a plurality of jacking blocks, and one end of the inner supporting shaft is inserted into the outer cylinder along the axial direction of the outer cylinder and is in sliding connection with the outer cylinder; the outer cylinder is provided with a plurality of through holes used for installing jacking blocks in a sliding mode in the radial direction, and the jacking blocks are arranged on the outer side of the inner supporting shaft. A first conical surface is arranged on the inner supporting shaft, a second conical surface matched with the first conical surface is arranged on the side, close to the inner supporting shaft, of the jacking block, and under the cooperation of the first conical surface and the second conical surface, when the inner supporting shaft moves in the axial direction away from the bottom of the outer barrel, the inner supporting shaft can move in the axial direction away from the bottom of the outer barrel. And the jacking block is driven to move outwards in the radial direction of the outer cylinder, so that the jacking block is in jacking contact with the wall surface of an inner hole in the stone. The stone hoisting device can effectively hoist stones with inner holes, and is low in cost, safe, reliable and practical.

Description

Technical Field

[0001] The utility model relates to a hoist, in particular to an internal support type lifting hoist used for vertical transportation of hard rock in a subway shaft. Background Art

[0002] In shaft and pile foundation projects, it is often necessary to lift large stones. Workers usually use steel wire ropes or chains to lift the stones. This lifting method is cumbersome to operate, and due to the irregular shapes of the stones after construction, the reliability of this method is low, and there are certain safety risks. In fact, in shaft and pile foundation projects, most of the stones have inner holes left during the construction process, but the existing lifting tools or lifting methods cannot make good use of the inner holes to lift the stones.

[0003] In view of this, the utility model proposes an internal support type lifting sling, which has a simple structure, is easy to operate, can effectively lift stones with inner holes, and is low in cost, safe, reliable and practical. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide an internal support type lifting sling for vertical transportation of hard rock in subway shafts, so as to lift stones with inner holes.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] An internal support type lifting device for vertical transportation of hard rock in a subway shaft comprises an outer cylinder, an inner support shaft and a plurality of tightening blocks, one end of the inner support shaft is inserted into the outer cylinder along the axial direction of the outer cylinder and slidably connected, and a plurality of through holes for radially slidingly installing the tightening blocks are provided in the outer cylinder, and the tightening blocks are arranged on the outer side of the inner support shaft;

[0007] A first conical surface is provided on the inner support shaft, and a second conical surface matching the first conical surface is provided on a side of the tightening block close to the inner support shaft, and with the cooperation of the first conical surface and the second conical surface, when the inner support shaft moves axially away from the bottom of the outer cylinder, the tightening block will be driven to move outward in the radial direction of the outer cylinder, so that the tightening block is in tight contact with the wall surface of the inner hole in the stone.

[0008] Furthermore, it also includes an elastic component, which includes an annular spring and a positioning pin. The positioning pins are fixedly installed at the upper and lower ends of the tightening block, and there are two annular springs, which are respectively sleeved on the outside of the positioning pins arranged at the upper and lower ends of the tightening block, so that the tightening block can shrink toward the center of the outer tube under the action of the annular spring.

[0009] Furthermore, the outer cylinder includes an upper cover plate, a cylinder body and a bottom baffle plate, wherein the upper cover plate and the bottom baffle plate are respectively fixedly connected to the two ends of the cylinder body, and a circular hole for the inner support shaft to pass through is provided on the upper cover plate to limit the axial displacement of the inner support shaft.

[0010] Furthermore, a lifting ring is provided on a side of the upper cover plate away from the cylinder body to lift the lifting device as a whole.

[0011] Furthermore, a boss is provided at the center of the bottom baffle plate on one side close to the cylinder, and the top height of the boss is greater than the bottom height of the through hole, so that the boss is abutted and connected with the side of the tightening block close to the inner support shaft to radially limit the tightening block.

[0012] Furthermore, the first conical surface is an inclined wedge, and the inclined direction of the inclined wedge is lowered toward the end close to the top of the outer cylinder, so that when the inner support shaft moves toward the end of the top of the outer cylinder, the tightening block is driven to move radially outward.

[0013] Furthermore, the oblique wedges are divided into two groups and are respectively arranged at the upper and lower ends of the tightening block, so that the tightening block is extended horizontally and synchronously as a whole.

[0014] Furthermore, a lifting ring is provided at one end of the inner support shaft extending out of the outer cylinder to serve as a connecting device between the inner support type lifting sling and the lifting device.

[0015] Furthermore, saw teeth are provided on one side of the tightening block extending out of the outer cylinder to increase the stability of lifting.

[0016] The beneficial effects of the utility model are:

[0017] 1. The utility model provides an internal support type lifting sling for vertical transportation of hard rock in subway shafts. The conical surface on the internal support shaft cooperates with the tightening block, so that the internal support shaft pushes out the tightening block in a linear motion during the upward movement, thereby clamping the inner hole of the stone, and finally lifting the stone with an inner hole. The structure is simple and reliable, and the stone with an inner hole can be effectively lifted. At the same time, it is low in cost, safe, reliable and practical.

[0018] 2. A circular hole is opened on the upper cover plate to limit the inner support shaft to only make axial movement, to ensure that during the lifting process, the inner support shaft does not tilt relative to the outer tube, and a boss is provided on the bottom baffle plate to provide axial limit for the tightening block after contraction, thereby ensuring that there is no risk of the tightening block falling into the tube and ensuring safe lifting; and a lifting ring is provided on the upper cover plate to facilitate the lifting of the sling as a whole.

[0019] 3. Elastic components are provided at both ends of the top tightening block. When the lifting of the sling is completed and the inner support shaft moves downward, the top tightening block is automatically recovered, which facilitates the removal of the sling for the next lifting. At the same time, the elastic components are installed at both ends of the top tightening block, and the positioning pins therein are located in the cylinder, which can also play a radial limiting role on the top tightening block, so that the top tightening block will not fall out of the cylinder, so that it cannot be lifted, ensuring the safety of lifting.

[0020] 4. By setting a double inclined wedge structure on the inner support shaft, the force is more stable. As the inner support shaft moves upward, the double inclined wedge surfaces are subjected to force at the same time, ensuring that the tightening block extends out horizontally, thereby clamping the inner wall of the stone hole to ensure that it does not fall off during hoisting; saw teeth are set on the side where the tightening block contacts the inner hole to increase the friction between the tightening block and the inner wall of the hole to ensure that it does not fall off during hoisting.

[0021] 5. The entire sling is integrated into a whole, which is convenient for movement and use. The interior of the sling is formed into a closed space through the outer tube, which reduces the possibility of foreign matter entering the interior during the lifting process, thereby extending the service life of the sling.

[0022] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0024] Figure 1 It is a cross-sectional structural schematic diagram of an internally supported lifting device used for vertical transportation of hard rock in a subway shaft in the utility model;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of an internal support type lifting sling used for vertical transportation of hard rock in a subway shaft in the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the outer cylinder in the utility model;

[0027] Figure 4 It is a schematic diagram of the arrangement of the elastic components in the utility model.

[0028] Figure numerals: inner support shaft 1, lifting ring 101, inclined wedge 102, outer cylinder 2, boss 201, through hole 202, upper cover plate 203, cylinder body 204, bottom baffle 205, lifting ring 206, tightening block 3, elastic component 4, annular spring 401, positioning pin 402. DETAILED DESCRIPTION

[0029] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0030] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] See also Figure 1 to Figure 4 , is an internal support type lifting device for vertical transportation of hard rock in subway shafts, comprising an outer cylinder 2, an inner support shaft 1 and four top tightening blocks 3, one end of the inner support shaft 1 is inserted into the outer cylinder 2 along the axial direction of the outer cylinder 2 and slidably connected, and four through holes 202 for slidably installing the top tightening blocks 3 are provided in the outer cylinder 2, so that the top tightening blocks 3 slide along the radial direction of the outer cylinder 2, and the top tightening blocks 3 are arranged on the outside of the inner support shaft 1;

[0033] A first conical surface is provided on the inner support shaft 1, and a second conical surface matching the first conical surface is provided on the side of the clamping block 3 close to the inner support shaft 1, so that when the inner support shaft 1 moves axially at one end away from the outer cylinder 2, the clamping block 3 will be driven to move outward in the radial direction of the outer cylinder 2 (that is, the vertical movement of the inner support shaft 1 is converted into horizontal movement of the clamping block 3 under the cooperation of the two conical surfaces), and then contact the wall surface of the inner hole in the stone, thereby finally realizing the lifting of the stone.

[0034] Preferably, the inner side of the tightening block 3 is further provided with a vertical surface arranged below the second conical surface, so that the inner support shaft has a distance where no interaction force is generated with the tightening block when the inner support shaft moves downward.

[0035] The internal support lifting sling also includes an elastic component 4, which includes an annular spring 401 and a positioning pin 402. The positioning pins 402 are fixedly installed at the upper and lower ends of each tightening block 3, and there are two annular springs 401, which are respectively sleeved on the outside of the positioning pins 402 arranged at the upper and lower ends of the tightening block 3, so that the tightening block 3 can shrink toward the center of the outer tube under the action of the annular spring 401 without being subjected to other external forces.

[0036] In another embodiment, the elastic component 4 may also be arranged at only one of the upper and lower ends of the tightening block 3, and the positioning pin may also be replaced by a screw or other fixing member.

[0037] The outer cylinder 2 includes an upper cover plate 203, a cylinder body 204 and a bottom baffle plate 205. The upper cover plate 203 and the bottom baffle plate 205 are respectively fixedly connected to the two ends of the cylinder body 204. The upper cover plate 203 has a circular hole for the inner support shaft 1 to pass through, so as to limit the axial displacement of the inner support shaft 1 during the up and down movement. A lifting ring 206 is provided on the side of the upper cover plate 203 away from the cylinder body 204, so as to lift the inner support lifting sling when no stone is lifted or when the inner support lifting sling is placed in the inner hole of the stone.

[0038] The bottom baffle 205 is provided with a boss 201 arranged at the center thereof on one side close to the cylinder, and the top height of the boss 201 is greater than the bottom height of the through hole 202, so that the boss 201 is in contact with the tightening block 3 (the side close to the inner support shaft) in a contracted state under the action of the elastic component 4, thereby radially limiting the tightening block 3 to prevent it from being adjusted into the outer cylinder 2. Specifically, the boss 201 is a truncated cone.

[0039] Specifically, the first conical surface is an oblique wedge 102, and the number of the oblique wedges 102 matches the number of the top tightening blocks 3, which is also set to 4, and the inclination direction of the oblique wedge 102 is lowered toward the end close to the upper cover plate 203, so that when the inner support shaft 1 moves toward the end of the upper cover plate 203, the top tightening block 3 is driven to move radially outward;

[0040] The inclined wedges 102 are provided in at least one group, preferably two groups in the present embodiment, and are respectively arranged at the upper and lower ends of the tightening block 3, so that the tightening block 3 can be extended synchronously as a whole to ensure the stability of lifting.

[0041] Furthermore, a lifting ring 101 is provided at one end of the inner support shaft 1 extending out of the outer cylinder 2 to serve as a connecting device between the inner support type lifting sling and the lifting device.

[0042] Preferably, a serration is provided on one side of the tightening block 3 extending out of the outer cylinder 2, and the serration faces one end of the upper cover plate 203, so as to increase the stability of lifting.

[0043] Specifically, in this embodiment, the upper cover plate 203 is connected to the cylinder 204 by bolts or welding, the bottom baffle plate 205 is axially fixedly connected to the cylinder 204 by a shoulder and a retaining ring inside the cylinder 204, and the bottom baffle plate 205 is connected to the boss 201 by bolts.

[0044] In another embodiment, the tightening block 3 may be set to two or more to adapt to the inner hole in different states; the first conical surface may be set to a cone with a small top and a large bottom; the annular spring 401 may be set to other forms of annular elastic parts, such as an elastic rubber rope, etc.

[0045] The use process of the internal support lifting sling is as follows:

[0046] The internal support type lifting sling is suitable for lifting stones with inner holes: when in use, the sling is hoisted into the hole by hoisting the hoisting ring 206 on the upper cover plate 203, and then the hoisting ring 101 on the inner support shaft is hoisted to start lifting. At this time, the inner support shaft 1 moves up, and the top clamping block 3 extends out horizontally under the action of the inner support shaft 1, thereby clamping the inner wall of the inner hole of the stone, thereby achieving lifting. After the lifting is completed, the inner support shaft is lowered, and as the inner support shaft moves down, the top clamping block 3 is automatically retracted under the action of the elastic component 4, and finally the sling is taken out by hoisting the hoisting ring 206 on the upper cover plate of the outer cylinder.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. An internally supported lifting device for vertical transportation of hard rock in subway shafts, characterized in that: It comprises an outer cylinder, an inner support shaft and a plurality of tightening blocks, one end of the inner support shaft is inserted into the outer cylinder along the axial direction of the outer cylinder and slidably connected, and a plurality of through holes for radially slidingly installing the tightening blocks are provided in the outer cylinder, and the tightening blocks are arranged on the outer side of the inner support shaft; A first conical surface is provided on the inner support shaft, and a second conical surface matching the first conical surface is provided on a side of the tightening block close to the inner support shaft, and with the cooperation of the first conical surface and the second conical surface, when the inner support shaft moves axially away from the bottom of the outer cylinder, the tightening block will be driven to move outward in the radial direction of the outer cylinder, so that the tightening block is in tight contact with the wall surface of the inner hole in the stone.

2. The internal support type lifting device for vertical transportation of hard rock in subway shafts according to claim 1 is characterized in that: It also includes an elastic component, which includes an annular spring and a positioning pin. The positioning pins are fixedly installed at the upper and lower ends of the tightening block. There are two annular springs, which are respectively sleeved on the outside of the positioning pins arranged at the upper and lower ends of the tightening block, so that the tightening block can shrink toward the center of the outer tube under the action of the annular spring.

3. The internal support type lifting device for vertical transportation of hard rock in subway shaft according to claim 1 is characterized in that: The outer cylinder includes an upper cover plate, a cylinder body and a bottom baffle plate. The upper cover plate and the bottom baffle plate are respectively fixedly connected to the two ends of the cylinder body. A circular hole for the inner support shaft to pass through is provided on the upper cover plate to limit the axial displacement of the inner support shaft.

4. The internal support type lifting device for vertical transportation of hard rock in subway shafts according to claim 3 is characterized in that: A lifting ring is provided on the side of the upper cover plate away from the cylinder body so as to lift the lifting device as a whole.

5. The internal support type lifting device for vertical transportation of hard rock in subway shaft according to claim 3 is characterized in that: A boss is arranged at the center of the bottom baffle plate on one side close to the cylinder, and the top height of the boss is greater than the bottom height of the through hole, so that the boss is in contact with the side of the tightening block close to the inner support shaft to radially limit the tightening block.

6. The internal support type lifting device for vertical transportation of hard rock in subway shafts according to claim 1 is characterized in that: The first conical surface is an inclined wedge, and the inclined direction of the inclined wedge is lowered toward the end close to the top of the outer cylinder, so that when the inner support shaft moves toward the end of the top of the outer cylinder, the tightening block is driven to move radially outward.

7. The internal support type lifting device for vertical transportation of hard rock in subway shafts according to claim 6 is characterized in that: The oblique wedges are divided into two groups and are respectively arranged at the upper and lower ends of the tightening block, so that the tightening block can be extended horizontally as a whole synchronously.

8. The internal support type lifting device for vertical transportation of hard rock in subway shafts according to claim 1 is characterized in that: A lifting ring is arranged at one end of the inner support shaft extending out of the outer cylinder to serve as a connecting device between the inner support type lifting sling and the lifting device.

9. The internal support type lifting device for vertical transportation of hard rock in subway shafts according to claim 1 is characterized in that: Saw teeth are arranged on one side of the tightening block extending out of the outer cylinder to increase the stability of lifting.

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