A kind of top return support device and system

Abstract

The present invention discloses a top-return support device and system, belonging to the technical field of building support structure, the device comprises a support tube, a perforated axial force gauge, a lower ball joint support, an upper ball joint support and a support assembly which are coaxially installed from bottom to top, a linear variable differential displacement gauge is installed on the inner side of the support tube, a screw rod is provided through the central activity of the linear variable differential displacement gauge, the upper end of the screw rod is connected to the upper ball joint support after passing through the perforated axial force gauge and the central activity of the lower ball joint support, and the support assembly is supported by the upper ball joint support; a nut is connected to the outer side of the screw rod at the same time, the nut is arranged between the lower ball joint support and the upper ball joint support and supported by the lower ball joint support; the screw rod can be driven to move up and down by rotating the nut, the top-return load can be measured by the perforated axial force gauge, and the top-return displacement can be measured by the linear variable differential displacement gauge. The device of the present invention can provide top-return displacement and force feedback, and realize refined control of top-return.

Description

Technical Field

[0001] The invention belongs to the technical field of building support structures, and in particular relates to a top return support device and system. Background Art

[0002] With the increasing complexity of structural systems or construction processes, the demand for re-topping existing structures or temporary structures during construction is increasing. The existing re-topping support methods mainly include two categories: rack jacking and steel wedges. For example, the invention patent application with application number 202110139058.4 uses a similar method to adjust the nut and screw of the rack system support jacking to screw in and out. There are also some other methods that use steel wedges to tighten the gap between the re-top support and the structure. None of the above methods can precisely control the displacement or force of the re-topping, and can only estimate the re-topping status based on experience. In cases where the structure is more sensitive, such as re-topping of historical protected buildings, the above methods are risky and cannot meet the requirements for protecting existing structures. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a return-to-top support device and system, which can provide return-to-top displacement and force feedback to achieve refined control of the return-to-top.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention discloses a return-to-top support device, comprising a support tube, a perforated axial force gauge, a lower ball joint support, an upper ball joint support and a support assembly coaxially installed in sequence from bottom to top, a linear variable differential displacement gauge is installed on the inner side of the support tube, a screw rod is provided through the central activity of the linear variable differential displacement gauge, the upper end of the screw rod is connected to the upper ball joint support after passing through the perforated axial force gauge and the central activity of the lower ball joint support, and the support assembly is supported by the upper ball joint support; a nut is also connected to the outer side of the screw rod, the nut is arranged between the lower ball joint support and the upper ball joint support and is supported by the lower ball joint support; the screw rod can be driven to move up and down by rotating the nut, the return-to-top load can be measured by the perforated axial force gauge, and the return-to-top displacement can be measured by the linear variable differential displacement gauge.

[0006] Furthermore, the lower ball joint support includes a bottom support plate and a bottom ball, the bottom ball is installed between the bottom support plate and the nut, and annular grooves for limiting the bottom ball are arranged on the end surfaces of the bottom support plate and the nut.

[0007] Furthermore, the upper ball joint support includes a top support plate and a top ball, the top ball is installed between the top support plate and the support assembly, and annular grooves for limiting the top ball are provided on the end surfaces of the top support plate and the support assembly.

[0008] Furthermore, the support assembly includes a support seat, an elastic support member, a piston, a piston rod, a ball head and a floating support plate, a plurality of floating support plates are installed in parallel on the upper side of the support seat, an oil chamber is opened on the inner side of the support seat, the oil chamber is filled with hydraulic oil, a piston hole connected to the oil chamber is opened on the upper side of the support seat, a piston is installed in the piston hole with a sliding seal, the piston is fixedly connected to the lower end of the piston rod, the upper end of the piston rod is connected to a ball head, and the ball head is hinged to the lower side of the floating support plate.

[0009] Furthermore, a limiting shell for axially limiting the two is arranged on the outer side of the support seat and the top support plate, and the limiting shell includes a first semicircular shell, a second semicircular shell, and a connecting piece connecting the first semicircular shell and the second semicircular shell together.

[0010] Furthermore, a guide rod is fixedly connected to the upper end of the nut, a rotating disk is slidably penetrated through the outer side of the guide rod, and the guide rod and the rotating disk are connected via a locking member.

[0011] A return-to-top support system comprises at least one return-to-top support device as described in any one of the above items, and also comprises a chain, a sprocket and a rotation drive device, wherein the outer side of the rotating disk is provided with gear teeth, the chain simultaneously connects the sprocket and the gear teeth, and the sprocket is simultaneously connected to the rotation drive device.

[0012] The beneficial effects of the present invention are:

[0013] The present invention discloses a return-to-top support device and system, which includes a support tube, a perforated axial force gauge, a lower ball joint support, an upper ball joint support and a support assembly coaxially installed from bottom to top. Rotating the nut can drive the screw rod to move up and down, the return-to-top load can be measured by the perforated axial force gauge, and the return-to-top displacement can be measured by the linear variable differential displacement meter, thereby providing return-to-top displacement and force feedback, thereby realizing refined control of the return-to-top.

[0014] The displacement range of the return support device disclosed in the present invention is mainly controlled by a linear variable differential displacement meter, and the load range is controlled by an upper ball joint support, a lower ball joint support, a support screw and a nut, and different models and specifications can be selected according to usage requirements. The device of the present invention has a compact structure and stable operation, and can ensure the safety of the structure.

[0015] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0017] Figure 1 It is a structural schematic diagram of the top return support device of the present invention;

[0018] Figure 2 It is a cross-sectional view of the return support device of the present invention;

[0019] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0020] Figure 4 It is a structural schematic diagram of the limiting shell;

[0021] Figure 5 This is an exploded view of the return support device;

[0022] Figure 6 It is a structural diagram of the return support system.

[0023] The markings in the accompanying drawings are as follows: support tube 1, perforated axial force gauge 2, lower ball joint support 3, upper ball joint support 4, support assembly 5, linear variable differential displacement meter 6, screw 7, nut 8, bottom support plate 9, bottom ball 10, ring groove 11, top support plate 12, top ball 13, support seat 14, elastic support member 15, piston 16, piston rod 17, ball head 18, floating support plate 19, oil chamber 20, piston hole 21, ball head 22, limit shell 23, first semicircular shell 24, second semicircular shell 25, connecting member 26, guide rod 27, rotating disk 28, locking member 29, chain 30, gear teeth 31, vertical rod 32. DETAILED DESCRIPTION

[0024] like Figures 1 to 5 As shown, a retraction support device disclosed in the present invention comprises a support tube 1, a perforated axial force gauge 2, a lower ball joint support 3, an upper ball joint support 4 and a support assembly 5 which are coaxially installed from bottom to top. The support tube 1 is a round tube, and the lower end of the support tube 1 is supported by the main structure. The upper end of the support assembly 5 is used to retraction the existing structure or temporary structure. The perforated axial force gauge 2 adopts the existing technology and can detect the axial force at both ends.

[0025] Specifically, a linear variable differential displacement meter 6 is installed on the inner side of the support tube 1 of the present invention. The support tube 1 is used to protect the linear variable differential displacement meter 6. A screw rod 7 is movably provided in the center of the linear variable differential displacement meter 6. The screw rod 7 is used to form the iron core of the linear variable differential displacement meter 6. When the screw rod 7 moves up and down, the iron core of the linear variable differential displacement meter 6 moves up and down. When the iron core deviates from the middle position and moves upward or downward, the degree of coupling between the iron core and the secondary coils of the two linear variable differential displacement meters 6 changes, and the difference in the induced electromotive force of the two secondary coils is no longer zero. The difference voltage is the output signal of the sensor, and the magnitude of the output voltage is linearly related to the displacement of the iron core. By measuring the magnitude and polarity of the output voltage, the displacement direction and displacement of the iron core can be determined. The linear variable differential displacement meter 6 belongs to technology, and those skilled in the art should be able to understand it. The linear variable differential displacement meter 6 can detect the displacement value and display it. The upper end of the screw rod 7 passes through the center of the perforated axial force meter 2 and the lower ball joint support 3 and is connected to the upper ball joint support 4. The support assembly 5 is supported by the upper ball joint support 4.

[0026] Among them, the outer side of the screw rod 7 is also connected with a nut 8, and the thread is threadedly matched with the nut 8. When the nut 8 rotates, the screw rod 7 can be driven to move up and down. The nut 8 is arranged between the lower ball joint support 3 and the upper ball joint support 4 and supported by the lower ball joint support 3; the screw rod 7 can be driven to move up and down by rotating the nut 8, the load of the return top can be measured by the perforated axial force meter 2, and the displacement of the return top can be measured by the linear variable differential displacement meter 6. The device of the present invention is used to return the existing structure or temporary structure to the top, and the matching linear variable differential displacement meter 6 and perforated axial force meter 2 can provide the return top displacement and force feedback to achieve refined control of the return top.

[0027] In this embodiment, the lower ball joint support 3 includes a bottom support plate 9 and a bottom ball 10. The bottom support plate 9 is a circular plate. The lower end of the bottom support plate 9 is in contact with the perforated axial force gauge 2. There are multiple bottom balls 10 distributed in a ring shape. The multiple bottom balls 10 are installed between the bottom support plate 9 and the nut 8. The end surfaces of the bottom support plate 9 and the nut 8 are provided with annular grooves 11 for limiting the bottom balls 10 to prevent the balls from falling out of the annular grooves 11.

[0028] In some other embodiments, a corresponding axial limiting structure can be set between the bottom support plate 9 and the nut 8 to facilitate the use of the overall structure and prevent the bottom ball 10 from falling out from between the bottom support plate 9 and the nut 8 after disassembling the device.

[0029] In this embodiment, the upper ball joint support 4 includes a top support plate 12 and a top ball 13. The top ball 13 is installed between the top support plate 12 and the support assembly 5. The end surfaces of the top support plate 12 and the support assembly 5 are provided with an annular groove 11 for limiting the top ball 13. The bottom ball 10 and the top ball 13 are both made of high-strength steel balls that can roll freely. While transmitting vertical loads, the rolling friction can be ignored. Due to the presence of the upper ball joint support 4 and the lower ball joint support 3, when the nut 8 is screwed in or out, the top support and the bottom support will not have a tendency to rotate with it.

[0030] In this embodiment, the support assembly 5 includes a support seat 14, an elastic support member 15, a piston 16, a piston rod 17, a ball head 18 and a floating support plate 19. The support seat 14 is circular, and the elastic support member 15 adopts a spring. The two ends of the spring are respectively connected to the support seat 14 and the piston rod 17. The spring is used to provide elastic supporting force to the piston rod 17 so that it can return to its original position after the force is applied.

[0031] In the embodiment of the present invention, the floating support plate 19 includes a central circular plate and six sector plates located around the central circular plate. The six sector plates are evenly distributed on the outer side of the central circular plate in a circumferential manner to form the floating support plate 19 through combination. Each sector plate and the central circular plate are independent of each other. A plurality of floating support plates 19 are installed in parallel on the upper side of the support seat 14.

[0032] An oil chamber 20 is provided inside the support seat 14, and the oil chamber 20 is filled with hydraulic oil. A piston hole 21 communicating with the oil chamber 20 is provided on the upper side of the support seat 14, and a piston 16 is installed in a sliding seal in the piston hole 21. The piston 16 is fixedly connected to the lower end of the piston rod 17, and the upper end of the piston rod 17 is connected to a ball head 18, which is hinged to the lower side of the floating support plate 19. When there are certain depressions or protrusions at the support, the floating support plates 19 can present different support heights, and can also be used to assist in supporting each plate.

[0033] For example, when the supporting part corresponding to the center circular plate is shorter, the piston rod 17 corresponding to the center circular plate moves downward, which can compress the piston 16 downward. Through the action of hydraulic oil, the remaining piston rods 17 around it can be propped up, and through the floating support of each floating support plate 19, it can play a role of stable support.

[0034] In this embodiment, a limiting shell 23 for axially limiting the support seat 14 and the top support plate 12 is provided on the outside of the support seat 14 and the top support plate 12, and the limiting shell 23 includes a first semicircular shell 24, a second semicircular shell 25, and a connecting piece 26 connecting the first semicircular shell 24 and the second semicircular shell 25. By providing the limiting shell 23, the axial position of the support seat 14 and the top support plate 12 can be limited, which can facilitate the disassembly and installation of the device, and can also facilitate the maintenance and replacement of the top ball 13 at any time.

[0035] In this embodiment, the upper end of the nut 8 is fixedly connected to a guide rod 27, and a rotating disk 28 is slidably penetrated through the outer side of the guide rod 27. The guide rod 27 and the rotating disk 28 are connected by a locking member 29. By providing the guide rod 27, the relative distance between the nut 8 and the rotating disk 28 can be adjusted.

[0036] When the return support device of the present invention is used alone, it can be directly used in combination with the vertical pole 32 supported by the rack, and the return force or displacement of the single vertical pole 32 can be adjusted. The single vertical pole 32 can also adopt the method of hydraulic telescopic rod, which can quickly adjust a large return stroke. When fine adjustment control is required, the nut 8 can be turned again.

[0037] like Figure 6 As shown, a return support system disclosed in the present invention includes at least one return support device as described above, and also includes a chain 30, a sprocket and a rotation drive device. The outer side of the rotating disk 28 is provided with gear teeth 31. The chain 30 simultaneously connects the sprocket and the gear teeth 31, and the sprocket is simultaneously connected to the rotation drive device. When the return force is large, multiple return support devices can be connected by the chain 30 to form a whole for common use. The return displacement or load can be synchronously adjusted by setting a motor. Furthermore, the control of the motor can be operated by a built-in or external controller, and can also be coordinated with remote information control. The transmission of the motor and the chain 30 is a conventional technical means and will not be elaborated in detail.

[0038] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A top return support device, characterized in that: It includes a support tube, a perforated axial force gauge, a lower ball joint support, an upper ball joint support and a support assembly which are coaxially installed from bottom to top. A linear variable differential displacement gauge is installed on the inner side of the support tube. A screw is inserted through the center of the linear variable differential displacement gauge. The upper end of the screw is connected to the upper ball joint support after passing through the perforated axial force gauge and the center of the lower ball joint support. The support assembly is supported by the upper ball joint support. A nut is also connected to the outer side of the screw. The nut is arranged between the lower ball joint support and the upper ball joint support and is supported by the lower ball joint support. Rotating the nut can drive the screw to move up and down. The load of the return to the top can be measured by the perforated axial force gauge, and the displacement of the return to the top can be measured by the linear variable differential displacement gauge.

2. A top-return support device according to claim 1, characterized in that: The lower ball joint support includes a bottom support plate and a bottom ball, wherein the bottom ball is installed between the bottom support plate and the nut, and annular grooves for limiting the bottom ball are arranged on the end surfaces of the bottom support plate and the nut.

3. A top-return support device according to claim 2, characterized in that: The upper ball joint support includes a top support plate and a top ball, wherein the top ball is installed between the top support plate and the support assembly, and annular grooves for limiting the top ball are arranged on the end surfaces of the top support plate and the support assembly.

4. A top-return support device according to claim 3, characterized in that: The support assembly includes a support seat, an elastic support member, a piston, a piston rod, a ball head and a floating support plate. Several floating support plates are installed in parallel on the upper side of the support seat. An oil chamber is opened on the inner side of the support seat, and the oil chamber is filled with hydraulic oil. A piston hole connected to the oil chamber is opened on the upper side of the support seat. A piston is installed in the piston hole with a sliding seal. The piston is fixedly connected to the lower end of the piston rod. The upper end of the piston rod is connected to a ball head, and the ball head is hinged to the lower side of the floating support plate.

5. A top-return support device according to claim 4, characterized in that: The outer sides of the support seat and the top support plate are provided with a limiting shell for axially limiting the two, and the limiting shell includes a first semicircular shell, a second semicircular shell, and a connecting piece connecting the first semicircular shell and the second semicircular shell together.

6. A top return support device according to any one of claims 1 to 5, characterized in that: The upper end of the nut is fixedly connected with a guide rod, the outer side of the guide rod is slidably penetrated by a rotating disk, and the guide rod and the rotating disk are connected by a locking piece.

7. A return support system, characterized in that: It comprises at least one return support device as claimed in claim 6, and also comprises a chain, a sprocket and a rotation drive device, wherein the outer side of the rotating disk is provided with gear teeth, the chain simultaneously connects the sprocket and the gear teeth, and the sprocket is simultaneously connected to the rotation drive device.

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