Friction type steel pipe piece lifting appliance for vacuum chuck

Abstract

A lifting appliance base body comprises a top plate, an annular web plate, a longitudinal web plate, a bottom connecting plate, a side rib plate and a positioning pin sleeve, and all the components are connected to form a stable whole; the connecting rod assembly is formed by sequentially connecting a connecting rod I, a connecting rod II, a connecting rod III and a connecting rod IV to form a double-rocker single-slider six-degree-of-freedom mechanism; the arm rod is mounted at a rotating pair of the connecting rod I and the connecting rod II; the rubber pressing plate is fixed on the outer side of the arm rod; a hydraulic motor is fixed to the bottom of the sliding rail through a power source mounting plate, a rotating shaft is in transmission connection with a fourth connecting rod through a key to drive a connecting rod assembly to be linked, an arm rod drives a rubber pressing plate to press a steel pipe web, and hoisting is achieved through friction force in cooperation with a vacuum chuck. The device is easy and convenient to operate, during use, only the hydraulic motor needs to be controlled, the rubber pressing plate on the arm rod is pressed on the web of the steel pipe piece, the steps of welding, bolt connection and the like on site are not needed, and the construction efficiency can be greatly improved.

Description

Technical Field

[0001] This invention relates to the field of shield tunnel construction equipment technology, specifically to a friction-type steel segment lifting tool for vacuum suction cups, suitable for lifting steel segments using vacuum suction cup assembly machines. Technical Background Steel tubular segments are prefabricated, assembled lining rings used in shield tunneling. Due to their superior mechanical properties and adaptability, they play an indispensable role in the construction of high-risk tunnels, including those crossing rivers and seas and those in complex geological conditions. However, in actual construction, because steel tubular segments have a non-enclosed structure, the vacuum suction cup-type assembly machines used for lifting concrete tubular segments cannot be directly applied to them. Furthermore, since the quantity of steel tubular segments used is significantly less than that of concrete tubular segments, installing a dedicated assembly machine for them is impractical.

[0002] In existing technologies, such as the steel-lined pipe segment grabbing and lifting device disclosed in patent (CN119774435B), the mechanical clamping force of the clamping device and the grabbing rod device is used for fixing. The structure is complex and requires precise alignment of the steel pipe segment holes. It has poor adaptability to steel pipe segments of different specifications, and the disassembly and assembly steps are cumbersome, resulting in low construction efficiency. The pipe lifting device disclosed in patent (CN208791013U) uses a vacuum suction cup with an L-shaped support plate for clamping. It is only suitable for ordinary pipes and has not designed an adaptation mechanism for the web structure of steel pipe segments. Moreover, it relies mainly on vacuum adsorption and supplemented by mechanical clamping. It has insufficient stability under the non-enclosed structure of steel pipe segments and is prone to slippage. At the same time, most existing lifting devices do not consider the full utilization of friction force, resulting in extremely high stress requirements on the mechanical structure during lifting, which increases equipment wear and safety hazards.

[0003] Furthermore, since steel segments are used in less quantity than concrete segments in tunnel construction, the cost of configuring new assembly machines is too high. Existing lifting devices suffer from poor stability, limited adaptability, and complex operation, severely impacting construction efficiency and safety. Therefore, there is an urgent need to design a lifting device with a simple structure, strong adaptability, and that utilizes friction for stable lifting, solving the technical challenges of lifting steel segments using vacuum suction cup assembly machines. Summary of the Invention

[0004] This invention provides a friction-type steel segment lifting device for vacuum suction cups, offering a solution to the aforementioned problems. This steel segment lifting device overcomes the weight of both by utilizing the friction between itself and the steel segment, thus achieving lifting.

[0005] The objective of this invention is achieved through the following technical solution: A friction-type steel pipe segment lifting device for vacuum suction cups includes a lifting device base, a slide rail, a slider, a connecting rod assembly, an arm, a power source mounting plate, a hydraulic motor, and a rubber pressure plate. The lifting device base includes a top plate, a circumferential web plate, a longitudinal web plate, a bottom connecting plate, side stiffeners, and positioning pins. The top plate, circumferential web plate, longitudinal web plate, bottom connecting plate, side stiffeners, and positioning pins are welded to form a stable whole. The connecting rod assembly consists of connecting rod one, connecting rod two, connecting rod three, and connecting rod four connected sequentially to form a six-degree-of-freedom mechanism with a double rocker and a single slider. The arm is installed at the rotating joint between connecting rod one and connecting rod two, and the rubber pressure plate is fixed to the outside of the arm. The hydraulic motor is fixed to the bottom of the slide rail through the power source mounting plate, and its rotating shaft is connected to connecting rod four via a key, driving the connecting rod assembly to move together. This causes the arm to drive the rubber pressure plate to press the steel pipe segment web plate, utilizing friction in conjunction with the vacuum suction cup to achieve lifting.

[0006] Furthermore, the top plate is an arc-shaped plate with the same radius as the vacuum suction cup and a slightly larger outer size than the bottom rubber ring of the vacuum suction cup. The top plate has two vertical circular holes, and positioning pin sleeves are welded inside the circular holes. The positioning pin sleeves are cylindrical with conical inner holes. The hole diameter is adapted to the positioning pin of the vacuum suction cup and does not exceed the upper surface of the top plate, so as to achieve precise positioning of the lifting device and the vacuum suction cup.

[0007] Furthermore, the circumferential web is uniformly welded to the bottom of the top plate, with the arc direction consistent with the top plate and the length slightly less than the top plate; the longitudinal web is a rectangular flat plate, located below the top plate and distributed between the circumferential webs, and is fixed to the top plate and circumferential webs by fillet welds, thereby improving the load-bearing strength of the lifting gear base.

[0008] Furthermore, the side stiffener is a pentagonal flat plate, welded below the top plate and located outside the circumferential web; the bottom connecting plate is located below the circumferential web and is welded to the circumferential web, longitudinal web, and side stiffener, further enhancing the structural stability of the lifting device base.

[0009] Furthermore, the lifting device base also includes four connecting rod mounting seats, welded to the bottom of the top plate. Each of the four sides of the connecting rod mounting seats is welded with a set of ear plates for hinged connection of the connecting rod assembly, so as to realize the stable installation and flexible rotation of the connecting rod assembly.

[0010] Furthermore, the first connecting rod is a rectangular steel plate with a single lug at both ends, and the second, third, and fourth connecting rods are all rectangular steel plates with a single lug at one end and a double lug at the other end. One end of the first connecting rod is hinged to the lug of the connecting rod mounting base, one end of the second connecting rod is hinged to the lug of the slider, and both ends of the third connecting rod are respectively hinged to the slider lug and the fourth connecting rod. The fourth connecting rod is fixed to the hydraulic motor shaft, forming a linkage structure with high transmission efficiency.

[0011] Furthermore, the arm is an L-shaped steel plate with double lugs at one end, the double lugs end of which is coaxially hinged to the rotating joints of connecting rod one and connecting rod two, and the other end is fixed to a rubber pressure plate by screws.

[0012] Furthermore, the slide rail is a profile structure, welded to the connecting rod mounting base, and has four screw holes at the bottom; the slider is a steel plate with ear plates, the middle hole is adapted to the shape of the slide rail and slidably connected, and the slider is hinged to the connecting rod two and connecting rod three through the ear plates.

[0013] Furthermore, the rubber pressure plate has a rectangular structure with two countersunk holes in the middle, and is fixed to the arm by screws.

[0014] Furthermore, the power source mounting plate is a rectangular steel plate with eight bolt holes, four of which are used to connect with the slide rail and the other four are used to fix the hydraulic motor.

[0015] The present invention has the following advantages over the prior art: 1. Solving the problem of vacuum suction cup compatibility: Through the design of the arc-shaped top plate and positioning pin sleeve, the lifting device can be directly adapted to the existing vacuum suction cup type assembly machine without modifying the assembly machine or steel pipe segment structure, thus solving the problem of steel pipe segments being unable to be directly lifted at low cost.

[0016] 2. Significantly improved hoisting stability: The double rocker single slider mechanism drives the rubber pressure plate to press the web plate, using friction to assist hoisting, and forming a double guarantee with the vacuum suction cup.

[0017] 3. High adaptability and easy operation: The 6-degree-of-freedom mechanism can flexibly adjust the position of the rubber pressure plate to adapt to the web arrangement of steel pipe segments of different specifications. No on-site welding or bolt connection is required. Clamping and loosening can be completed by hydraulic motor control alone, which greatly improves construction efficiency.

[0018] 4. High structural strength and low wear: The lifting gear base is made of multiple web plates and stiffening plates welded together to form a whole, with excellent load-bearing capacity. The design of the rubber pressure plate reduces wear on the web plates of the steel pipe segments and reduces equipment wear.

[0019] 5. The top plate of this invention is similar in shape to a vacuum suction cup but slightly larger in size, allowing it to be lifted using a vacuum suction cup assembly machine. When lifted, this invention utilizes the friction generated by the close contact between its components and the web of the steel pipe segment to move the segment along with it. Therefore, this invention effectively solves the problem of lifting steel pipe segments using a vacuum suction cup assembly machine.

[0020] 6. This invention is easy to operate. When using it, you only need to control the hydraulic motor to press the rubber pressure plate on the boom onto the web of the steel pipe. There is no need to perform welding, bolting, or other steps on site, which can greatly improve construction efficiency.

[0021] 7. This invention has strong applicability. Because this invention uses a flexible double-rocker single-slider mechanism, it has excellent compatibility with different steel tubes with varying sizes but within acceptable ranges. Attached Figure Description

[0022] Figure 1 General installation drawing for friction-type steel pipe segment lifting device for vacuum suction cups; Figure 2 Location 1 of the installation diagram for the friction-type steel pipe segment lifting device for vacuum suction cups (longitudinal web); Figure 3 Location 2 (circumferential web) of the installation diagram for the friction-type steel pipe segment lifting device for vacuum suction cups; Figure 4 General drawing of friction-type steel pipe segment lifting device for vacuum suction cup; Figure 5 Front view of a friction-type steel segment lifting device for vacuum suction cups; Figure 6 Enlarged view of the implementing agency details; Figure 7 Left view of a friction-type steel segment lifting device for vacuum suction cups; Figure 8 A bottom view of a friction-type steel segment lifting device for vacuum suction cups; The markings in the diagram are as follows: 1-Lifting device base, 2-Slide rail, 3-Slider, 4-Connecting rod one, 5-Connecting rod two, 6-Connecting rod three, 7-Connecting rod four, 8-Arm, 9-Power source mounting plate, 10-Hydraulic motor, 11-Rubber pressure plate. Detailed Implementation

[0023] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. The drawings are for illustrative purposes only and are not intended to limit the scope of the invention.

[0024] like Figures 1 to 8As shown, this invention discloses a friction-type steel pipe segment lifting device for a vacuum suction cup, comprising a lifting device base 1, a slide rail 2, a slider 3, connecting rod 4, connecting rod 5, connecting rod 6, connecting rod 7, an arm 8, a power source mounting plate 9, a hydraulic motor 10, a key, a rubber pressure plate 11, a shaft, and several bolts and nuts. The lifting device base 1 is composed of a top plate, a circumferential web plate, a longitudinal web plate, a bottom connecting plate, side stiffeners, and positioning pins. The components are connected to form a stable structure with excellent load-bearing capacity. Connecting rods 4, 5, 3, 6, and 7 are installed sequentially to form a 6-DOF mechanism with a double rocker and a single slider. The arm 8 is installed at the rotating joint connecting connecting rod 4 and 5, and the rubber pressure plate 11 is installed on the outside of the arm 8. The power source mounting plate 9 is installed at the bottom of the slide rail 2, and the hydraulic motor 10 is connected to the power source mounting plate 9. When the shaft of the hydraulic motor 10 rotates, it drives the connecting rod 4 7 to rotate via a key. This, in turn, drives the connecting rod 3 6 to rotate, the slider 3 to move, the connecting rod 2 5 to rotate, and the connecting rod 1 4 to rotate. Ultimately, this achieves the horizontal movement of the boom 8 located at the connection point between connecting rod 1 4 and connecting rod 2 5. Under the action of the boom 8, the rubber pressure plate 11 is tightly pressed against the inner web of the steel pipe segment. When the sum of the resulting total frictional force and the pulling force provided by the vacuum suction cup exceeds the sum of the weights of the steel pipe segment and the lifting device, the steel pipe segment can be successfully lifted.

[0025] The lifting gear base includes one top plate, three circumferential web plates, twelve longitudinal web plates, ten side stiffening plates, three bottom connecting plates, two positioning pin sleeves, and four connecting rod mounting seats.

[0026] The top plate is an arc-shaped plate with the same radius as the vacuum suction cup. Its overall shape is similar to the rubber ring at the bottom of the vacuum suction cup, but slightly larger. The top plate has two vertical circular holes, positioned to match the two locating pins on the vacuum suction cup. The circumferential web plates are evenly welded to the bottom of the top plate, with the arc direction matching that of the top plate, and their overall length slightly less than the top plate. The longitudinal web plates are rectangular flat plates located below the top plate, between the circumferential web plates, and are welded to the top plate and circumferential web plates via fillet welds. The side stiffening plates are pentagonal flat plates welded below the top plate, on the outer side of the circumferential web plates. The bottom connecting plate is located below the circumferential web plates and is welded to the circumferential web plates, longitudinal web plates, and side stiffening plates. The locating pin sleeve is cylindrical, with an internal conical hole slightly longer than the locating pin, and all other dimensions being the same. It is welded into the vertical circular holes in the top plate, below but not exceeding the upper surface of the top plate. The connecting rod mounting base is welded below the top plate; its specific position needs to be adjusted according to the specifications of the steel pipe segments. The connecting rod mounting base has eight lugs welded on it for mounting the connecting rod.

[0027] like Figure 1As shown, the vacuum suction cup friction-type steel pipe segment lifting tool of the present invention has a base plate radius that is consistent with the inner arc surface of the steel pipe segment. During lifting, the vacuum suction cup friction-type steel pipe segment lifting tool presses on the steel pipe segment, and the two are in close contact.

[0028] like Figure 2 As shown, the friction-type lifting device for vacuum suction cups of the present invention has a total of 8 rubber pressure plates pressing on the longitudinal web of the steel tube segment.

[0029] like Figure 3 As shown, the friction-type lifting device for vacuum suction cups of the present invention has a total of 8 rubber pressure plates pressing on the circumferential web of the steel tube.

[0030] like Figure 4 As shown, the friction-type steel tube segment lifting device for vacuum suction cups of the present invention includes a lifting device base, a slide rail, a slider, connecting rod one, connecting rod two, connecting rod three, connecting rod four, an arm, a power source mounting plate, a hydraulic motor, a key, a rubber pressure plate, and a shaft.

[0031] like Figure 4 As shown, the core components of the lifting device base are the top plate and the bottom plate. The radius and shape of the top plate are the same as those of the vacuum suction cup, but its overall dimensions are slightly larger. There are two vertical through holes in the center of the top plate, with two tapered pin sleeves welded inside. The radius of the bottom plate matches the inner arc surface of the steel pipe segment. In addition, four mounting seats are welded to the bottom of the top plate, and each of the four sides of the mounting seats has a set of mounting lugs for mounting the connecting rod. The top plate has... like Figure 4 As shown, the slide rail is a profile of a certain length, welded to four mounting bases below the lifting device base; the bottom of the slide rail has four screw holes for connecting the power source mounting plate.

[0032] like Figure 4 As shown, the slider is a steel plate of a certain thickness, with a set of mounting ears welded to each of the four sides, and the hollow in the middle is consistent with the shape of the slide rail.

[0033] like Figure 5 As shown, connecting rod one is a rectangular steel plate with single lugs at both ends. Connecting rods two, three, and four are all rectangular steel plates with a single lug at one end and a double lug at the other. The boom is an L-shaped steel plate with a double lug at one end. Connecting rods one, two, and the boom are connected at one end, forming a triangular fork. The other end of connecting rod one is mounted on a mounting base below the lifting device base. The other end of connecting rod two is mounted inside the mounting lug of the slider. The other end of the boom is connected to a rubber pressure plate with screws. One end of connecting rod three is mounted inside the mounting lug of the slider, and the other end is connected to connecting rod four. The other end of connecting rod four is connected to a hydraulic motor via a shaft and key. All rods are installed via shaft connections.

[0034] like Figure 6As shown, the power source mounting plate is a rectangular steel plate with eight bolt holes: four for connecting to the slide rail and the other four for mounting the hydraulic motor.

[0035] like Figure 6 As shown, the rubber pressure plate is rectangular with two countersunk holes in the middle for installing screws.

[0036] During construction, firstly, the hydraulic motor is controlled to drive the double-rocker single-slider mechanism, causing the rubber pressure plate to retract horizontally to its innermost position, facilitating the insertion of the lower component of the vacuum suction cup friction-type steel pipe segment lifter into the steel pipe segment. Next, the vacuum suction cup friction-type steel pipe segment lifter is placed on the steel pipe segment, with the relative positions of the two aligned as centrally as possible, adjustable according to the web arrangement inside the steel pipe segment of different specifications. Then, the hydraulic motor is controlled again to extend the rubber pressure plate horizontally to its outermost position, pressing it firmly against the web of the steel pipe segment. Finally, the two positioning pins of the vacuum suction cup assembly machine are inserted into the two tapered pin sleeves of the vacuum suction cup friction-type steel pipe segment lifter, evacuating the air from the vacuum suction cup and enabling the vacuum suction cup assembly machine to lift the steel pipe segment.

Claims

1. A friction-type steel pipe segment lifting device for vacuum suction cups, characterized in that, The system includes a lifting frame base, slide rails, sliders, connecting rod assemblies, boom, power source mounting plate, hydraulic motor, and rubber pressure plate. The lifting frame base comprises a top plate, circumferential web, longitudinal web, bottom connecting plate, side stiffeners, and positioning pins, which are welded together to form a stable whole. The connecting rod assembly consists of connecting rod one, connecting rod two, connecting rod three, and connecting rod four connected sequentially to form a six-degree-of-freedom mechanism with a double rocker and single slider. The boom is mounted at the rotating joint between connecting rod one and connecting rod two, and the rubber pressure plate is fixed to the outside of the boom. The hydraulic motor is fixed to the bottom of the slide rail via the power source mounting plate, and its shaft is connected to connecting rod four via a key, driving the connecting rod assembly to move in tandem. This causes the boom to drive the rubber pressure plate to press against the web of the steel pipe segment, utilizing friction in conjunction with a vacuum suction cup to achieve lifting.

2. The friction-type steel pipe segment lifting device for vacuum suction cups according to claim 1, characterized in that, The top plate is an arc-shaped plate with the same radius as the vacuum suction cup. Its outer dimensions are slightly larger than the rubber ring at the bottom of the vacuum suction cup. The top plate has two vertical circular holes with positioning pin sleeves welded inside. The positioning pin sleeves are cylindrical with conical inner holes. The hole diameter matches the positioning pin of the vacuum suction cup and does not exceed the upper surface of the top plate, thus achieving precise positioning of the lifting device and the vacuum suction cup.

3. The friction-type steel pipe segment lifting device for vacuum suction cups according to claim 1, characterized in that, The circumferential web is uniformly welded to the bottom of the top plate, with the arc direction consistent with the top plate and the length slightly less than the top plate; the longitudinal web is a rectangular flat plate, located below the top plate and distributed between the circumferential webs, and is fixed to the top plate and circumferential webs by fillet welds, thereby improving the load-bearing strength of the lifting gear base.

4. The friction-type steel pipe segment lifting device for vacuum suction cups according to claim 1, characterized in that, The side stiffener plate is a pentagonal flat plate, welded below the top plate and located on the outside of the circumferential web plate; the bottom connecting plate is located below the circumferential web plate and is welded to the circumferential web plate, longitudinal web plate and side stiffener plate, further enhancing the structural stability of the lifting device base.

5. The friction-type steel pipe segment lifting device for vacuum suction cups according to claim 1, characterized in that, The lifting device base also includes four connecting rod mounting seats, which are welded to the bottom of the top plate. Each of the four sides of the connecting rod mounting seat is welded with a set of ear plates for hinged connection of the connecting rod assembly, so as to realize the stable installation and flexible rotation of the connecting rod assembly.

6. The friction-type steel pipe segment lifting device for vacuum suction cups according to claim 1, characterized in that, The first connecting rod is a rectangular steel plate with a single lug at both ends. The second, third, and fourth connecting rods are all rectangular steel plates with a single lug at one end and a double lug at the other end. One end of the first connecting rod is hinged to the lug of the connecting rod mounting base. One end of the second connecting rod is hinged to the lug of the slider. The two ends of the third connecting rod are respectively hinged to the slider lug and the fourth connecting rod. The fourth connecting rod is fixed to the hydraulic motor shaft, forming a linkage structure with high transmission efficiency.

7. The friction-type steel pipe segment lifting device for vacuum suction cups according to claim 1, characterized in that, The arm is an L-shaped steel plate with double lugs at one end. The lugs are coaxially hinged to the rotating joints of connecting rod one and connecting rod two, and the other end is fixed to a rubber pressure plate by screws.

8. The friction-type steel pipe segment lifting device for vacuum suction cups according to claim 1, characterized in that, The slide rail is a profile structure, welded to the connecting rod mounting base, and has four screw holes at the bottom; the slider is a steel plate with ear plates, the middle hole is adapted to the shape of the slide rail and slidably connected, and the slider is hinged to the connecting rod two and connecting rod three through the ear plates.

9. The friction-type steel pipe segment lifting device for vacuum suction cups according to claim 1, characterized in that, The rubber pressure plate has a rectangular structure with two countersunk holes in the middle, and is fixed to the arm with screws.

10. The vacuum suction cup friction-type steel pipe segment lifting device according to claim 1 is characterized in that, The power source mounting plate is a rectangular steel plate with eight bolt holes, four of which are used to connect with the slide rail and the other four are used to fix the hydraulic motor.

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