Hydraulic lifting device

Abstract

The utility model provides a hydraulic lifting device which comprises a fixing pipe fitting, the upper end of the fixing pipe fitting is fixedly connected with all lifting cylinder bodies, the upper ends of the lifting cylinder bodies and the interior of the fixing pipe fitting are fixedly connected with clamping cylinder bodies, each lifting cylinder body comprises a cylinder body part and a lifting part, each cylinder body part is formed by a U-shaped section surrounding the axis, and each lifting part is fixedly connected with the corresponding clamping cylinder body. The lower portion of the lifting part is arranged in the U shape in a matched mode, the clamping cylinder body comprises a fixed disc, the outer side of the fixed disc is sleeved with a movable sleeve, the inner wall of the lower portion of the movable sleeve is fixedly connected with a first convex ring, the side wall of the fixed disc is fixedly connected with a second convex ring, and the second convex ring is located above the first convex ring. A plurality of conical holes are formed in the fixed disc, a plurality of conical clamping blocks which define a frustum are arranged in the conical holes, a cover plate is fixedly connected to the upper end of the movable sleeve, and a hanging cable is arranged in the conical holes in a penetrating mode. According to the hydraulic lifting device, through a reciprocating hydraulic lifting mode, an object with too large mass can be lifted.

Description

Technical Field

[0001] The present invention relates to the field of lifting technologies, and in particular, to a hydraulic lifting device. Background Art

[0002] During the construction of steel structure buildings, the steel structures are usually assembled on the ground and then hoisted and installed. Most of the commonly used hoisting equipment is a crane. Although the crane is flexible in operation, there are areas that the crane cannot reach, and the load is relatively small, which cannot meet the hoisting of extra-large components.

[0003] For example, when building an elevated waiting hall, its roof is completely composed of steel components. If each steel component is hoisted and installed one by one, first, the hoisting volume is large, which is not conducive to improving the construction efficiency. At the same time, the construction personnel spend a long time working at high altitudes, with high accidental risks, and there are tests for the stability of welding and other installations and maintenance. Therefore, a device that can assemble the roof on the ground and then hoist it as a whole is needed. Summary of the Invention

[0004] To solve the above problems, the present invention discloses a hydraulic lifting device, including a fixed pipe fitting. The upper end of the fixed pipe fitting is fixedly connected to all lifting cylinders, and clamping cylinders are fixedly connected to both the upper end of the lifting cylinders and the inside of the fixed pipe fitting. That is, the lifting cylinders are used to lift heavy objects. The upper and lower clamping cylinders are hereinafter referred to as the lower cylinder and the upper cylinder respectively. When the lifting cylinders lift, the lower cylinder does not move, and the upper cylinder moves. When the lifting cylinders descend, the lower cylinder moves, and the upper cylinder does not move.

[0005] The lifting cylinder includes a cylinder part and a lifting part. The cylinder part is formed by a U-shaped cross-section surrounding an axis, and the lower part of the lifting part is fitted inside the U shape. When the lifting cylinder acts, that is, the lifting part rises or descends.

[0006] The clamping cylinder includes a fixed disk. An activity sleeve is sleeved outside the fixed disk. A first convex ring is fixedly connected to the inner wall of the lower part of the activity sleeve. A second convex ring is fixedly connected to the side wall of the fixed disk, and the second convex ring is located above the first convex ring. A number of tapered holes are opened on the fixed disk, and a number of tapered clamping blocks forming a frustum are arranged in the tapered holes. A cover plate is fixedly connected to the upper end of the activity sleeve. A suspension cable is inserted through the tapered holes. When the activity sleeve descends, the cover plate presses the tapered clamping blocks downward, so that the tapered clamping blocks clamp the passing suspension cable.

[0007] Preferably, a lifting hydraulic chamber is formed by the lower part of the lifting part and the U shape, and a number of first sealing rings are sleeved on the side wall of the lifting part. That is, injecting hydraulic oil into the lifting hydraulic chamber realizes the rising of the lifting part, and discharging the hydraulic oil realizes the descending of the lifting part.

[0008] Preferably, a clamping hydraulic chamber is formed between the first convex ring and the second convex ring, and second sealing rings are sleeved on the side walls of the first convex ring and the second convex ring. Hydraulic oil is injected into the clamping hydraulic chamber, then the movable sleeve moves downward, and the cover plate presses the conical clamping block to realize the clamping and fixing of the suspension cable.

[0009] Preferably, a spring is arranged inside the conical hole, the lower end of the spring abuts against the inside of the conical hole, and the upper end of the spring abuts against the bottom of the conical clamping block. The function of the spring is to ensure that the conical clamping block remains in the upper position when it is not pressed.

[0010] Preferably, a backing plate is arranged between the spring and the conical clamping block. The use of the backing plate ensures that all the conical clamping blocks can be lifted together.

[0011] The beneficial effects of the present invention are as follows:

[0012] 1. By adopting the hydraulic method, the lifting load capacity is greatly improved. At the same time, by combining multiple devices, ultra-large heavy objects can be hoisted.

[0013] 2. Two clamping cylinders are provided, which play the role of holding the heavy object during the hoisting process, realizing the lifting of the heavy object when the lifting cylinder lifts and keeping the height of the heavy object when the lifting cylinder resets. At the same time, it also plays the role of preventing the heavy object from falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional schematic diagram of the present invention;

[0015] Figure 2 is an exploded schematic diagram of the lifting cylinder of the present invention;

[0016] Figure 3 is an exploded schematic diagram of the clamping cylinder of the present invention;

[0017] Figure 4 is a cross-sectional schematic diagram of the present invention.

[0018] LIST OF REFERENCE NUMERALS:

[0019] 1. Fixed pipe fitting; 2. Lifting cylinder; 3. Clamping cylinder; 4. Suspension cable;

[0020] 21. Cylinder part; 22. First sealing ring; 23. Lifting part; 31. Movable sleeve; 32. First convex ring; 33. Fixed disk; 34. Second convex ring; 35. Conical hole; 36. Spring; 37. Conical clamping block; 38. Cover plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present invention will be further clarified below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. It should be noted that the terms "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0022] As Figures 1 to 4 shown, a hydraulic lifting device includes a fixed pipe fitting 1. Flanges are provided at the upper ends of the fixed pipe fitting 1, and at the same time, a ring plate is folded inward at the bottom. All lifting cylinders 2 are fixedly connected to the upper end of the fixed pipe fitting 1, and the two are fixed by means of flange connection. Clamping cylinders 3 are fixedly connected to the upper ends of the lifting cylinders 2 and the inside of the fixed pipe fitting 1. Herein, the clamping cylinder 3 located inside the fixed pipe fitting 1 is called the lower cylinder, and at the same time, the lower cylinder is fixedly connected to the ring plate. The clamping cylinder 3 located at the upper end of the lifting cylinder 2 is called the upper cylinder.

[0023] The lifting cylinder 2 includes a cylinder body member 21 and a lifting member 23. The cylinder body member 21 is formed by surrounding an axis with a U-shaped cross-section. The purpose of this structure is that the suspension cable 4 can pass through the middle of the lifting cylinder 2. The lower part of the lifting member 23 is fitted inside the U-shape. When the lifting cylinder 2 operates, that is, the lifting member 23 rises or falls. At the same time, the cross-sectional shape of the lifting member 23 is a rectangle with an opening on one side, and the rectangle rotates around the axis to obtain the lifting member 23.

[0024] The clamping cylinder 3 includes a fixed disk 33 which is used for fixation, and a circle of threaded holes are provided at the lower part for cooperation and fixation with the ring plate / the upper end of the lifting member 23. An activity sleeve 31 is sleeved outside the fixed disk 33, that is, the activity sleeve 31 can move up and down relative to the fixed disk 33. A first convex ring 32 is fixedly connected to the inner wall of the lower part of the activity sleeve 31, and a second convex ring 34 is fixedly connected to the side wall of the fixed disk 33, and the second convex ring 34 is located above the first convex ring 32. A number of tapered holes 35 are provided on the fixed disk 33, and a number of tapered clamping blocks 37 enclosing a frustum are arranged in the tapered holes 35. A cover plate 38 is fixedly connected to the upper end of the activity sleeve 31, and the suspension cable 4 is inserted through the tapered holes 35. That is, during the downward sliding of the activity sleeve 31, the cover plate 38 presses the tapered clamping blocks 37, and the tapered clamping blocks 37 hold and fix the suspension cable 4.

[0025] A lifting hydraulic chamber is formed by the lower part of the lifting member 23 and the U-shape. That is, by injecting hydraulic oil into the lifting hydraulic chamber, the lifting member 23 can be lifted, and by discharging the hydraulic oil to perform cylinder retraction, that is, the lifting member 23 descends. A number of first sealing rings 22 are sleeved on the side wall of the lifting member 23. The setting of the first sealing rings 22 improves the sealing performance of the lifting hydraulic chamber.

[0026] A clamping hydraulic chamber is formed between the first convex ring 32 and the second convex ring 34. When hydraulic oil is injected into the clamping hydraulic chamber, the movable sleeve 31 descends, clamping the conical clamping block 37 and clamping and fixing the suspension cable 4. Conversely, when the hydraulic oil is discharged, the suspension cable 4 is released. The side walls of the first convex ring 32 and the second convex ring 34 are both sleeved with second sealing rings, and the second sealing rings improve the sealing performance of the clamping hydraulic chamber.

[0027] A spring 36 is arranged inside the conical hole 35. The lower end of the spring 36 abuts against the inside of the conical hole 35, and the upper end of the spring 36 abuts against the bottom of the conical clamping block 37. That is, the purpose of the spring 36 is that when the conical clamping block 37 is in an unclamped state, it is in an upper position state to ensure that the clamping of the suspension cable 4 is released.

[0028] A backing plate is arranged between the spring 36 and the conical clamping block 37. The use of the backing plate enables the conical clamping blocks 37 in the same conical hole 35 to rise synchronously.

[0029] Working principle: During the construction of the device, it is fixedly connected to the truss in advance. The lower end of the suspension cable 4 is fixed with a heavy object, and the suspension cable 4 passes upward through the device. When lifting the heavy object, first, the lower cylinder body discharges oil and the upper cylinder body maintains oil injection. Then, oil is injected into the lifting cylinder body 2 to achieve a single lift in the middle. Next, the lower cylinder body injects oil and the upper cylinder body discharges oil and maintains, and the lifting cylinder body 2 discharges oil and resets. After resetting, the above steps are repeated to continuously lift the heavy object. When the heavy object descends, the operation process is opposite. The lower cylinder body and the upper cylinder body are used to separate the connection between the lifting cylinder body 2 and the heavy object in a timely manner. Further, a mechanism for collecting and arranging the suspension cable 4 is arranged on one side of the device to ensure smooth lifting and release, and when lifting large steel structures, multiple devices can be used for linkage lifting.

[0030] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A hydraulic lifting device, characterized in that: It includes a fixed pipe fitting (1), the upper end of the fixed pipe fitting (1) is fixedly connected to all lifting cylinder bodies (2), and clamping cylinder bodies (3) are fixedly connected to the upper ends of the lifting cylinder bodies (2) and inside the fixed pipe fitting (1); The lifting cylinder body (2) includes a cylinder body part (21) and a lifting part (23). The cylinder body part (21) is formed by surrounding an axis with a U-shaped cross-section, and the lower part of the lifting part (23) is fitted inside the U-shape; The clamping cylinder body (3) includes a fixed disk (33). An activity sleeve (31) is sleeved outside the fixed disk (33). A first convex ring (32) is fixedly connected to the inner wall of the lower part of the activity sleeve (31). A second convex ring (34) is fixedly connected to the side wall of the fixed disk (33), and the second convex ring (34) is located above the first convex ring (32). A number of tapered holes (35) are formed in the fixed disk (33), and a number of tapered clamping blocks (37) forming a frustum are arranged in the tapered holes (35). A cover plate (38) is fixedly connected to the upper end of the activity sleeve (31), and a suspension cable (4) is inserted through the tapered holes (35).

2. The hydraulic lifting device according to claim 1, wherein: A lifting hydraulic chamber is formed by the lower part of the lifting part (23) and the U-shape, and a number of first sealing rings (22) are sleeved on the side wall of the lifting part (23).

3. A hydraulic lifting device according to claim 1, characterized in that: A clamping hydraulic chamber is formed between the first convex ring (32) and the second convex ring (34), and second sealing rings are sleeved on the side walls of the first convex ring (32) and the second convex ring (34).

4. A hydraulic lifting device according to claim 1, characterized in that: A spring (36) is arranged inside the tapered hole (35). The lower end of the spring (36) abuts against the inside of the tapered hole (35), and the upper end of the spring (36) abuts against the bottom of the tapered clamping block (37).

5. A hydraulic lifting device according to claim 4, characterized in that: A backing plate is arranged between the spring (36) and the tapered clamping block (37).

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