Rectangular section pipe hoisting retainer

Abstract

The invention provides a rectangular section pipe hoisting retainer which comprises a front frame assembly, a rear frame assembly and a connecting assembly, the front frame assembly and the rear frame assembly are the same in structure, the front frame assembly comprises a first rack, a second rack, a rotary cylinder and a telescopic arm, and the first rack and the second rack are the same in structure and are arranged in a crossed mode; the middle of the first rack is rotationally connected with the middle of the second rack, the first rack and the second rack are each rotationally provided with a rotary cylinder, the two ends of each rotary cylinder are each in threaded connection with a telescopic arm, the thread turning directions of the two telescopic arms on the same rotary cylinder are opposite, and each telescopic arm is limited to the corresponding first rack or the corresponding second rack in a sliding mode. The end, away from the rotary cylinder, of the telescopic arm supports the inner wall of the pipeline. The retainer can be quickly assembled and disassembled on the inner wall of the rectangular pipeline to support the rectangular pipeline, so that the pipeline is prevented from being deformed in the hoisting process.

Description

Technical Field

[0001] This invention relates to the field of lifting auxiliary clamps, and in particular to a rectangular cross-section tube lifting retainer. Background Technology

[0002] In the hoisting of long, thin-walled rectangular cross-section pipes, the method of fixing both ends and then lifting them is commonly used for transportation. When the pipe is long, the wall is thin, and there are other structures inside the pipe adding weight, the rectangular cross-section pipe is prone to elastic-plastic deformation. Although elastic deformation can recover after hoisting, it often affects the installation accuracy during hoisting and assembly; plastic deformation, on the other hand, can damage the pipe and affect its subsequent function. Summary of the Invention

[0003] In view of the shortcomings of the above-mentioned related technologies, the purpose of this invention is to provide a rectangular cross-section tube hoisting retainer to solve the problem of deformation during the hoisting process of rectangular tubes in the related technologies.

[0004] To achieve the above and other related objectives, the present invention provides a rectangular cross-section pipe hoisting retainer, comprising a front frame assembly, a rear frame assembly, and a connecting assembly. The front frame assembly and the rear frame assembly have the same structure. The front frame assembly includes a first frame, a second frame, a rotary drum, and a telescopic arm. The first frame and the second frame have the same structure and are arranged in a cross configuration. The middle portions of the first frame and the second frame are rotatably connected. A rotary drum is rotatably mounted on each of the first frame and the second frame. A telescopic arm is threaded to both ends of each rotary drum, and the threads of the two telescopic arms on the same rotary drum have opposite directions. Each telescopic arm is slidably limited to the corresponding first frame or second frame. The end of the telescopic arm away from the rotary drum is used to support the inner wall of the pipe.

[0005] Optionally, a support liner is connected to the end of the telescopic arm away from the rotary drum. The support liner includes a right-angle liner, which is an L-shaped plate, and is used to support the end corner of the pipe.

[0006] Optionally, the end of the telescopic arm away from the rotary drum is connected to an inner liner seat, the telescopic arm is connected to the supporting inner liner through the inner liner seat, the inner liner seat is provided with an ear plate on the side opposite to the rotary drum, the supporting inner liner includes a connecting plate, one end of the connecting plate is connected to the right-angle inner liner, and the other end of the connecting plate is rotatably connected to the ear plate.

[0007] Optionally, the retainer further includes a limiting rod, and the limiting rod is provided between the inner liner seat connected to the telescopic arm on the first frame and the first frame, and between the inner liner seat connected to the telescopic arm on the second frame and the second frame. One end of the limiting rod is fixedly connected to the inner liner seat, and the other end of the limiting rod is slidably connected to the first frame or the second frame, or one end of the limiting rod is fixedly connected to the first frame or the second frame, and the other end of the limiting rod is slidably connected to the inner liner seat.

[0008] Optionally, the second frame has an arc-shaped strip on its side away from the first frame, and the arc-shaped strip has equally spaced insertion holes. The first frame has a support on its side facing the second frame, and a pin is slidably connected to the support. The pin is pluggably connected to any of the insertion holes to lock the first frame and the second frame.

[0009] Optionally, the pin has a large end that protrudes from the support, and a spring is fitted onto the pin. The two ends of the spring abut against the large end and the support, respectively, and the large end is inserted into the socket under the action of the spring.

[0010] Optionally, the first frame is further provided with a hollow limiting seat on the side facing the second frame. The curvature of the limiting seat is the same as that of the arc strip. The arc strip is slidably inserted into the limiting seat. The limiting seat is provided with a hole for the pin to pass through.

[0011] Optionally, the connecting assembly includes two connecting rods and a threaded cylinder. One end of each of the two connecting rods is connected to the front frame assembly and the rear frame assembly, respectively, and the other end of each of the two connecting rods is threaded to the threaded cylinder with opposite thread directions.

[0012] As described above, the rectangular cross-section pipe hoisting retainer of the present invention has the following beneficial effects: The present invention is a quick-install and quick-release retainer, which realizes the stepless extension and retraction of the telescopic arm by rotating the rotary cylinder, so that the mechanism is applicable to rectangular cross-sections with different side lengths within a certain range, and the self-locking property of the thread allows the telescopic arm to reliably support the inner wall of the rectangular pipe, thereby avoiding pipe deformation. Attached Figure Description

[0013] Figure 1 The diagram shown is a schematic representation of the overall assembly of the rectangular cross-section tube hoisting cage in an embodiment of the present invention.

[0014] Figure 2 The diagram shown is a schematic representation of the front frame assembly in an embodiment of the present invention.

[0015] Figure 3The diagram shown is a partial schematic of the front frame assembly in an embodiment of the present invention.

[0016] Figure 4 The diagram shows the locking mechanism of the arc-shaped bar and the pin in an embodiment of the present invention.

[0017] Figure 5 The diagram shown is a schematic representation of the installation of the pin in an embodiment of the present invention.

[0018] Figure 6 The diagram shown illustrates the connection between the telescopic arm and the inner liner in an embodiment of the present invention.

[0019] Figure 7 The diagram shown illustrates the connection between the front frame assembly and the connecting rod in an embodiment of the present invention.

[0020] Component designation explanation

[0021] 1. First frame; 101. Support; 102. Pin; 103. Spring; 104. Limit seat; 2. Second frame; 201. Connecting cylinder; 3. Rotary cylinder; 4. Telescopic arm; 5. Inner liner seat; 501. Sleeve; 502. Ear plate; 6. Arc strip; 601. Insertion hole; 7. Right-angle inner liner; 8. Connecting plate; 9. Limit rod; 10. Connecting rod; 11. Threaded cylinder; 12. Lifting hole. Detailed Implementation

[0022] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0023] In the detailed description of embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0024] For ease of description, spatial relation terms such as “below,” “under,” “lower than,” “below,” “above,” and “upper” may be used herein to describe the relationship between one element or feature shown in the accompanying drawings and other elements or features. It will be understood that these spatial relation terms are intended to include directions other than those depicted in the drawings for the device in use or operation. Furthermore, when a layer is referred to as being “between” two layers, it can be the only layer between the two layers, or there may be one or more layers in between. The term “between” as used herein includes both endpoint values.

[0025] In the context of this application, the structure described above the first feature may include embodiments in which the first and second features are formed in direct contact, or embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0026] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0027] like Figures 1 to 3 As shown, this embodiment provides a rectangular cross-section pipe lifting retainer. This retainer is used to lift large, thin-walled, long rectangular cross-section pipes, enabling rapid lifting and supporting the inner wall of the pipe to prevent deformation during lifting. The retainer includes a front frame assembly, a connecting assembly, and a rear frame assembly. The front frame assembly and the rear frame assembly have the same structure; the front frame assembly will be used as an example for explanation.

[0028] The front frame assembly includes a first frame 1, a second frame 2, a rotary drum 3, a telescopic arm 4, an inner liner seat 5, and a supporting inner liner. The structure of the first frame 1 is the same as that of the second frame 2. The first frame 1 and the second frame 2 are arranged crosswise, and the middle parts of the first frame 1 and the middle parts of the second frame 2 are rotatably connected by rivets. That is, the first frame 1 and the second frame 2 can rotate around the axis of the rivets, but cannot be separated from each other.

[0029] The first frame 1 has a U-shaped structure. The rotary drum 3 is rotatably mounted between the two side arms of the first frame 1. The connection method between the rotary drum 3 and the first frame 1 is a mature existing technology, which will not be described in detail here. This connection allows the rotary drum 3 to only rotate relative to the first frame 1 and cannot be pulled out from it.

[0030] Similarly, the second frame 2 has a U-shaped structure and also has a rotary drum 3, and the connection method is the same as that of the rotary drum 3 on the first frame 1, which will not be described in detail here. It is understandable that the two rotary drums 3 intersect each other and do not interfere with each other.

[0031] like Figure 4 and Figure 5As shown, the second frame 2 has an arc-shaped strip 6 on its side away from the first frame 1. The arc-shaped strip 6 has equally spaced insertion holes 601. The first frame 1 has an L-shaped support 101 on its side facing the second frame 2. One end of the support 101 is vertically fixed to the first frame 1, and the other end of the support 101 is parallel to the side of the first frame 1 facing the second frame 2. A pin 102 is slidably inserted through the other end of the support 101. The pin 102 moves in a direction perpendicular to the first frame 1. The pin 102 has a large end that is close to the first frame 1. A limiting post is provided at the end of the pin 102 away from the large end. The limiting post can prevent the pin 102 from disengaging from the support 101.

[0032] A spring 103 is fitted onto the pin 102. The two ends of the spring 103 abut against the large end of the pin 102 and the side of the support 101 facing the first frame 1, respectively. The pin 102 moves toward the first frame 1 under the action of the spring 103.

[0033] The first frame 1 is also provided with a limiting seat 104, which is arc-shaped and has the same curvature as the arc strip 6. The limiting seat 104 is arranged opposite to the pin 102. The limiting seat 104 is hollow, and the interior of the limiting seat 104 is used for the arc strip 6 to slide through. When the first frame 1 and the second frame 2 rotate relative to each other, the arc strip 6 will slide relative to the limiting seat 104. The limiting seat 104 has a hole structure on the side facing the pin 102 for the pin 102 to pass through. Under the action of the spring 103, the pin 102 passes through the limiting seat 104 and is inserted into the insertion hole 601 on the arc strip 6. At this time, the arc strip 6 is locked under the limiting of the pin 102, thereby achieving the purpose of locking the first frame 1 and the second frame 2.

[0034] like Figure 3 and Figure 6 As shown, a telescopic arm 4 is connected to each end of the rotary drum 3. The two end faces of the rotary drum 3 are respectively provided with internal threaded holes, and the ends of the telescopic arms 4 are provided with corresponding external threads. The telescopic arms 4 are connected to the rotary drum 3 by threads. In order to drive the two telescopic arms 4 to move at the same time, the threads connecting the two telescopic arms 4 to the same rotary drum 3 have opposite directions of rotation, so that the two telescopic arms 4 can move away from each other or move closer to each other at the same time.

[0035] Taking one of the telescopic arms 4 on the first frame 1 as an example, the end of the telescopic arm 4 away from the rotary drum 3 is connected to the inner liner seat 5. The inner liner seat 5 is provided with a sleeve 501, and the telescopic arm 4 is inserted into the sleeve 501. A pin is passed through the sleeve 501 and the telescopic arm 4 for fixed connection.

[0036] The inner liner seat 5 has an ear plate 502 on the side opposite to the sleeve 501. The inner liner support includes a right-angle inner liner 7 and a connecting plate 8. One end of the connecting plate 8 is connected to the right-angle inner liner 7, and the other end of the connecting plate 8 and the ear plate 502 on the inner liner seat 5 are hinged by rivets. The right-angle inner liner 7 is an L-shaped plate with a 90-degree right angle. The right-angle inner liner 7 is used to support the corners inside the rectangular pipe.

[0037] like Figure 6 and Figure 7 As shown, the retainer also includes a limiting rod 9, which is parallel to the telescopic arm 4. One end of the limiting rod 9 is fixedly connected to the inner liner 5, and the other end of the limiting rod 9 is slidably inserted into the first frame 1. Alternatively, one end of the limiting rod 9 is fixedly connected to the first frame 1, and the other end of the limiting rod 9 is slidably inserted into the inner liner 5. The limiting rod 9 is used to make the inner liner 5 translate relative to the first frame 1, with the direction of movement being the axial direction of the telescopic arm 4. It should be noted that a limiting rod 9 is also connected between the inner liner 5 connected to the telescopic arm 4 on the second frame 2 and the second frame 2, and the connection method is the same as described above.

[0038] like Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, the connecting assembly includes two connecting rods 10 and a threaded cylinder 11. A connecting cylinder 201 is located at the center of the side of the second frame 2 opposite to the first frame 1. One end of each connecting rod 10 is inserted into the connecting cylinder 201, and the connecting rods 10 and the connecting cylinder 201 can be fixed with pins. The end of the connecting rod 10 away from the second frame 2 is inserted into one end of the threaded cylinder 11 and threadedly connected to it. The other end of the threaded cylinder 11 is threadedly connected to another connecting rod 10. The end of the other connecting rod 10 away from the threaded cylinder 11 is used to connect to the second frame 2 in the rear frame assembly. It is understood that the threads connecting the two connecting rods 10 to the same threaded cylinder 11 have opposite directions of rotation; rotating the threaded cylinder 11 can simultaneously drive the two connecting rods 10 to retract or extend.

[0039] In summary, the implementation process of this embodiment is as follows: First, rotate the threaded cylinder 11 to adjust the distance between the front frame assembly and the rear frame assembly according to the length of the rectangular cross-section pipe to be lifted; then, adjust the angle between the first frame 1 and the second frame 2 in the front frame assembly and the rear frame assembly according to the length-to-width ratio of the pipe cross-section, and lock the first frame 1 and the second frame 2 with the pin 102; retract the telescopic arm 4 by adjusting the rotary cylinder 3 so that the retainer can enter the rectangular cross-section pipe to be lifted; insert the adjusted retainer into the rectangular cross-section pipe, and extend the telescopic arm 4 by rotating the rotary cylinder 3 so that the support liner is pressed against the inner wall of the rectangular cross-section pipe, thus completing the assembly of the retainer and the rectangular pipe. Both the first frame 1 and the second frame 2 are provided with lifting holes 12, through which the lifting operation of the retainer and the held rectangular cross-section pipe can be realized. The intermediate connecting assembly has a strong structure, which can effectively resist the elastic-plastic deformation of the pipe during lifting.

[0040] This invention provides a quick-installation and quick-removal retainer for the hoisting of thin-walled, elongated rectangular cross-section tubes. Compared to previous hoisting retainers, the advantages of this embodiment are:

[0041] 1. The telescopic arm 4 achieves stepless extension and retraction, making the mechanism applicable to rectangular cross-sections with different side lengths within a certain range, and the self-locking property of the thread allows the telescopic arm 4 to reliably support the inner wall of the rectangular pipe.

[0042] 2. By setting forward and reverse rotation directions on the rotary drum 3, the telescopic boom 4 can be synchronously extended and retracted at both ends;

[0043] 3. By setting up intersecting telescopic arms 4 and making the angle between the intersecting telescopic arms 4 adjustable, the mechanism can be adapted to rectangular cross sections inside tubes with different aspect ratios.

[0044] 4. By setting up a mechanism to lock the first frame 1 and the second frame 2, the two cross telescopic arms 4 are locked at specific angular intervals, making the subsequent hoisting work reliable;

[0045] 5. The distance between the front and rear frame components can be adjusted steplessly, making this mechanism suitable for rectangular cross-section tubes of different lengths within a certain range;

[0046] 6. By setting the limit rod 9 structure, the inner liner seat 5 can only move linearly relative to the first frame 1 or the second frame 2;

[0047] 7. By hinged between the right-angle inner liner 7 and the inner liner seat 5, the adaptive fit between the right-angle inner liner 7 and the right angle inside the rectangular tube is achieved.

[0048] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A rectangular cross-section tube hoisting retainer, characterized in that, The system includes a front frame assembly, a rear frame assembly, and a connecting assembly. The front frame assembly and the rear frame assembly have the same structure. The front frame assembly includes a first frame, a second frame, a rotary drum, and a telescopic arm. The first frame and the second frame have the same structure and are arranged in a cross configuration. The middle parts of the first frame and the second frame are rotatably connected. A rotary drum is rotatably mounted on each of the first frame and the second frame. A telescopic arm is threaded to both ends of each rotary drum, and the threads of the two telescopic arms on the same rotary drum have opposite directions. Each telescopic arm slides within the corresponding first frame or second frame. The end of the telescopic arm away from the rotary drum is used to support the inner wall of the pipe.

2. The rectangular cross-section tube hoisting retainer according to claim 1, characterized in that: The end of the telescopic arm away from the rotary drum is connected to a support liner. The support liner includes a right-angle liner, which is an L-shaped plate. The right-angle liner is used to support the corner of the pipe.

3. The rectangular cross-section tube hoisting retainer according to claim 2, characterized in that: The telescopic arm is connected to an inner liner seat at the end away from the rotary drum. The telescopic arm is connected to the supporting inner liner through the inner liner seat. The inner liner seat has an ear plate on the side away from the rotary drum. The supporting inner liner includes a connecting plate. One end of the connecting plate is connected to the right-angle inner liner, and the other end of the connecting plate is rotatably connected to the ear plate.

4. The rectangular cross-section tube hoisting retainer according to claim 3, characterized in that: The retainer further includes a limiting rod. The limiting rod is provided between the inner liner seat connected to the telescopic arm on the first frame and the first frame, and between the inner liner seat connected to the telescopic arm on the second frame and the second frame. One end of the limiting rod is fixedly connected to the inner liner seat, and the other end of the limiting rod is slidably connected to the first frame or the second frame. Alternatively, one end of the limiting rod is fixedly connected to the first frame or the second frame, and the other end of the limiting rod is slidably connected to the inner liner seat.

5. The rectangular cross-section tube hoisting retainer according to claim 1, characterized in that: The second frame has an arc-shaped strip on its side away from the first frame, and the arc-shaped strip has equally spaced insertion holes. The first frame has a support on its side facing the second frame, and a pin is slidably connected to the support. The pin is pluggably connected to any of the insertion holes to lock the first frame and the second frame.

6. The rectangular cross-section tube hoisting retainer according to claim 5, characterized in that: The pin has a large end that protrudes from the support. A spring is fitted onto the pin, with its two ends abutting against the large end and the support, respectively. The large end is inserted into the socket under the action of the spring.

7. The rectangular cross-section tube hoisting retainer according to claim 6, characterized in that: The first frame is also provided with a hollow limiting seat on the side facing the second frame. The curvature of the limiting seat is the same as that of the arc strip. The arc strip is slidably inserted into the limiting seat. The limiting seat is provided with a hole for the pin to pass through.

8. The rectangular cross-section tube hoisting retainer according to claim 1, characterized in that: The connecting assembly includes two connecting rods and a threaded cylinder. One end of each of the two connecting rods is connected to the front frame assembly and the rear frame assembly, respectively. The other end of each of the two connecting rods is threaded to the threaded cylinder, and the threads are turned in opposite directions.

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