Hydraulic lifting equipment and working method

Abstract

The present invention discloses a hydraulic lifting device and a working method. The hydraulic lifting device includes a main hydraulic cylinder, a support rod, an upper locking mechanism and a lower locking mechanism; the upper locking mechanism and the lower locking mechanism are respectively arranged above and below the main hydraulic cylinder; the upper locking mechanism is connected to the piston rod of the main hydraulic cylinder, and the lower locking mechanism is connected to the cylinder block of the main hydraulic cylinder; and both the upper locking mechanism and the lower locking mechanism are selectively connected to the support rod; one of the upper locking mechanism and the support rod is used for connecting with a load; the working method of the hydraulic lifting device includes a load lifting condition and / or a load lowering condition. In this way, the support rod can replace the traditional lifting platform to support the load, saving a large number of temporary measures, preventing the column from tilting caused by setting the lifting platform on one side of the column, effectively ensuring the installation accuracy during the load lifting or lowering process, and saving the installation period.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting, and particularly relates to a hydraulic lifting device and a working method thereof. Background Art

[0002] In the field of lifting and installation, hydraulic lifters are often used to install large equipment or large steel structure grids. When the lifting capacity is large or the area of the steel structure grid to be lifted is large, multiple hydraulic lifters are often required for multi-point cluster lifting. Existing hydraulic lifters often use computer-controlled hydraulic synchronous lifting technology to perform multi-point synchronous lifting of the load. When using traditional hydraulic lifters, a lifting platform needs to be set up at a high altitude to place the hydraulic lifters.

[0003] During actual use, if the lifting platform is eccentrically erected on the original structure column, during the process of the hydraulic lifter lifting the load, most of the columns will be subjected to the action of lifting force eccentric load and tilt; after the load is lifted in place and welded to the column for supplementary rods, due to the difficulty of correcting the skew of the column, deviations will occur in the initial stress and shape position after the installation of the equipment or large steel structure grid, thus generating certain potential safety hazards. Summary of the Invention

[0004] The purpose of the present invention is to provide a hydraulic lifting device and a working method thereof to solve the problem that after the hydraulic lifter placed on the column lifting platform lifts the load, the original structure column will tilt, resulting in deviations in both the initial stress and the shape position after the installation of the equipment or large steel structure grid.

[0005] To achieve at least one of the above purposes, the present invention provides a hydraulic lifting device, which includes a main hydraulic cylinder, a support rod, an upper locking mechanism and a lower locking mechanism; the upper locking mechanism and the lower locking mechanism are respectively arranged above and below the main hydraulic cylinder; the upper locking mechanism is connected to the piston rod of the main hydraulic cylinder, and the lower locking mechanism is connected to the cylinder block of the main hydraulic cylinder; and both the upper locking mechanism and the lower locking mechanism are selectively connected to the support rod, and one of the upper locking mechanism and the support rod is used for connecting to the load;

[0006] The hydraulic lifting device has a load lifting condition and / or a load lowering condition; in the load lifting condition, the upper locking mechanism is separated from the support rod, the lower locking mechanism is connected to the support rod, the upper locking mechanism is connected to the load, and the main hydraulic cylinder is used to drive the upper locking mechanism to lift the load, or the upper locking mechanism is connected to the support rod, the lower locking mechanism is separated from the support rod, the support rod is connected to the load, and the main hydraulic cylinder is used to drive the upper locking mechanism to drive the support rod to lift the load;

[0007] In the load lowering condition, the upper locking mechanism is separated from the support rod, the lower locking mechanism is connected to the support rod, the upper locking mechanism is connected to the load, and the main hydraulic cylinder is used to drive the upper locking mechanism to lower the load. Alternatively, the upper locking mechanism is connected to the support rod, the lower locking mechanism is separated from the support rod, the support rod is connected to the load, and the main hydraulic cylinder is used to drive the upper locking mechanism to drive the support rod to lower the load.

[0008] Optionally, the support rod sequentially passes through the upper locking mechanism, the main hydraulic cylinder, and the lower locking mechanism.

[0009] Optionally, a plurality of main connection parts are equidistantly arranged on the support rod in its own length direction; the upper locking mechanism includes a first connection part, and the first connection part is used to cooperate and connect with at least one of the main connection parts; the lower locking mechanism includes a second connection part, and the second connection part is used to cooperate and connect with at least one of the main connection parts; the shape of the first connection part matches the shape of the main connection part, and / or the shape of the second connection part matches the shape of the main connection part.

[0010] Optionally, the main connection part includes a groove, the first connection part includes a first convex block, and the second connection part includes a second convex block;

[0011] The upper locking mechanism further includes a first hydraulic cylinder, the first hydraulic cylinder is connected to the first convex block, and the first hydraulic cylinder is used to drive the first convex block to partially enter or disengage from the groove. The lower locking mechanism includes a second hydraulic cylinder, the second hydraulic cylinder is connected to the second convex block, and the second hydraulic cylinder is used to drive the second convex block to partially enter or disengage from the groove.

[0012] Optionally, the groove is an annular groove provided on the outer surface of the support rod; the number of the first convex blocks and the first hydraulic cylinders is multiple, and the multiple first convex blocks are distributed along the circumferential direction of the support rod. Each first convex block is connected to a corresponding first hydraulic cylinder, and the multiple first convex blocks can synchronously enter or disengage from the same annular groove under the drive of the corresponding first hydraulic cylinders respectively; the number of the second convex blocks and the second hydraulic cylinders is multiple, and the multiple second convex blocks are distributed along the circumferential direction of the support rod. Each second convex block is connected to a corresponding second hydraulic cylinder, and the multiple second convex blocks can synchronously enter or disengage from the same annular groove under the drive of the corresponding second hydraulic cylinders respectively.

[0013] Optionally, the support rod includes a plurality of standard sections connected end to end in sequence.

[0014] Optionally, the hydraulic lifting device includes multiple sets of lifting mechanisms. Each set of lifting mechanisms includes a main hydraulic cylinder, a support rod, an upper locking mechanism, and a lower locking mechanism that cooperate with each other. Each support rod can bear at least part of the load. A plurality of main connection parts are equidistantly arranged on each support rod in the extending direction. The distances between all the main connection parts on all the support rods are the same. All the upper locking mechanisms can jointly lift or lower the load.

[0015] Optionally, when the upper locking mechanism is connected to the load, the hydraulic lifting device further includes a height difference adjusting screw and a load-bearing base. The two ends of the height difference adjusting screw are respectively connected to the support rod and the load-bearing base. The height difference adjusting screw is used to adjust the height of the support rod so that the upper locking mechanism can be connected to the load. The load-bearing base is used to be placed on a concrete floor or a roadbed box and fix the support rod.

[0016] Optionally, when the support rod is connected to the load, the hydraulic lifting device includes a bottom bracket. The bottom bracket is connected to the lower locking mechanism and is used to be placed on a concrete floor or a roadbed box and fix the lower locking mechanism.

[0017] To achieve at least one of the above purposes, the present invention also provides a working method of a hydraulic lifting device. Using any one of the above-mentioned hydraulic lifting devices, it includes the working steps of lifting a load, including:

[0018] Separating the upper locking mechanism from the support rod, connecting the lower locking mechanism to the support rod, and connecting the upper locking mechanism to the load; the main hydraulic cylinder performs an extending cylinder movement to drive the upper locking mechanism to drive the load to rise until the upper locking mechanism reaches a first predetermined position and then connects to the support rod; after the main hydraulic cylinder retracts the cylinder to separate the lower locking mechanism from the support rod, the main hydraulic cylinder performs a retracting cylinder movement to drive the lower locking mechanism to move upward relative to the support rod until the lower locking mechanism reaches a second predetermined position and then connects to the support rod; after the main hydraulic cylinder extends the cylinder to release the connection between the upper locking mechanism and the support rod at the first predetermined position, the main hydraulic cylinder performs an extending cylinder movement to drive the upper locking mechanism to lift the load;

[0019] Alternatively, connect the upper locking mechanism to the support rod, separate the lower locking mechanism from the support rod, and connect the support rod to the load; the main hydraulic cylinder extends to drive the upper locking mechanism and the support rod to lift the load until the lower locking mechanism is connected to the support rod after the upper locking mechanism reaches the third predetermined position; after the main hydraulic cylinder retracts to separate the upper locking mechanism from the support rod, the main hydraulic cylinder retracts to make the upper locking mechanism reach the fourth predetermined position and then connect to the support rod; after the main hydraulic cylinder extends to separate the lower locking mechanism from the support rod, the main hydraulic cylinder extends to drive the upper locking mechanism to drive the support rod to lift the load.

[0020] To achieve at least one of the above objectives, the present invention also provides a working method for a hydraulic lifting device, using any one of the hydraulic lifting devices described above, including the working steps of lowering the load, including:

[0021] Connect the upper locking mechanism to the support rod, the main hydraulic cylinder retracts to separate the lower locking mechanism from the support rod, and connect the upper locking mechanism to the load; the main hydraulic cylinder extends to drive the lower locking mechanism to move downward relative to the support rod until the lower locking mechanism reaches the second predetermined position and then connects to the support rod; after the main hydraulic cylinder extends to separate the upper locking mechanism from the support rod, the main hydraulic cylinder retracts to drive the upper locking mechanism to drive the load to descend until the upper locking mechanism reaches the first predetermined position and then connects to the support rod; after the main hydraulic cylinder retracts to separate the lower locking mechanism from the support rod, the main hydraulic cylinder extends to drive the lower locking mechanism to move downward.

[0022] Alternatively, connect the lower locking mechanism to the support rod, the main hydraulic cylinder retracts to separate the upper locking mechanism from the support rod, and connect the support rod to the load; the main hydraulic cylinder extends to drive the upper locking mechanism to move upward until the upper locking mechanism reaches the third predetermined position and then connects to the support rod; after the main hydraulic cylinder extends to separate the lower locking mechanism from the support rod, the main hydraulic cylinder retracts to drive the upper locking mechanism and the support rod to drive the load to descend until the lower locking mechanism is connected to the support rod after the upper locking mechanism reaches the fourth predetermined position; after the main hydraulic cylinder retracts to separate the upper locking mechanism from the support rod, the main hydraulic cylinder extends to drive the upper locking mechanism to move upward.

[0023] In summary, in the hydraulic lifting equipment and working method provided by the present invention, the hydraulic lifting equipment includes a main hydraulic cylinder, a support rod, an upper locking mechanism, and a lower locking mechanism; the upper locking mechanism and the lower locking mechanism are respectively arranged above and below the main hydraulic cylinder; the upper locking mechanism is connected to the piston rod of the main hydraulic cylinder, and the lower locking mechanism is connected to the cylinder block of the main hydraulic cylinder; and both the upper locking mechanism and the lower locking mechanism are selectively connected to the support rod; the hydraulic lifting equipment includes a load lifting condition and / or a load lowering condition. With such a configuration, when the load is connected to the upper locking mechanism, the hydraulic lifting equipment can drive the upper locking mechanism to move upward or downward through the main hydraulic cylinder, and selectively connect the upper locking mechanism and the lower locking mechanism to the support rod, so that the upper locking mechanism, the lower locking mechanism, and the main hydraulic cylinder can successively climb or descend on the support rod, and the load can be lifted or lowered by driving the upper locking mechanism. And the support rod can replace the traditional lifting platform to support the load, the upper locking mechanism, the lower locking mechanism, and the main hydraulic cylinder, so that the lifting platform with a large floor area can be saved, and the column skew caused by unilateral lifting of the lifting platform on the column can be prevented, effectively ensuring the safety and reliability during the lifting or lowering process of the load. When the load is connected to the support rod, the hydraulic lifting equipment can drive the upper locking mechanism to move upward or downward through the main hydraulic cylinder, and intermittently connect the upper locking mechanism to the support rod, so that the upper locking mechanism drives the support rod and the load to rise or fall. In addition, all components in the hydraulic lifting equipment can be recycled, which can not only save energy and protect the environment, but also save the installation period, ensure the installation accuracy, and reduce the influence of the installation equipment on the structure of the load body, thereby filling the technical gap of the climbing hydraulic lifting equipment.

[0024] The hydraulic lifting equipment provided by the present invention can use multiple sets of lifting mechanisms to jointly lift or lower the load. Since a plurality of main connection parts are arranged at intervals in the extending direction of the support rod, and the distances between all the main connection parts on the support rod in each set of lifting mechanisms are the same, so that the main hydraulic cylinders in each set of lifting mechanisms can ensure that the moving distances between the main hydraulic cylinders are equal after moving a pitch, and can ensure that multiple main hydraulic cylinders can always lift the load synchronously during the load lifting process, further ensuring the smoothness of the load lifting, and also ensuring the reliability of the operation of the hydraulic lifting equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a front view of the hydraulic lifting equipment in a preferred embodiment of the present invention;

[0026] Figure 2 is Figure 1 a partial longitudinal sectional view of the hydraulic lifting equipment in

[0027] Figure 3 isFigure 2 Cross-sectional view along the line A-A in

[0028] Figure 4 is Figure 2 Cross-sectional view along the line B-B in

[0029] Figure 5 is Figure 2 Cross-sectional view along the line C-C in

[0030] Figure 6 Schematic diagram of the usage scenario of the hydraulic lifting device in a preferred embodiment of the present invention;

[0031] Figure 7 Schematic diagram of the usage scenario of the hydraulic lifting device in another preferred embodiment of the present invention;

[0032] Figure 8 Schematic diagram of the structure of the height difference adjusting screw in a preferred embodiment of the present invention;

[0033] Figure 9 Schematic diagram of the structure of the load-bearing base in a preferred embodiment of the present invention.

[0034] The description of the reference numerals is as follows:

[0035] Hydraulic lifting device 1; main hydraulic cylinder 2; piston rod 21 of the main hydraulic cylinder; support rod 3; groove 31; standard section 32; upper locking mechanism 4; first convex block 41; first hydraulic cylinder 42; first mounting member 43; lower locking mechanism 5; second convex block 51; second hydraulic cylinder 52; second mounting member 53;

[0036] Load connection seat 6; fastener 71; attachment rod 72; height difference adjusting screw 8; load-bearing base 9; bottom bracket 10. Detailed implementation manners

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the objectives of the embodiments of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or capable of communicating with each other; it can be directly connected, or connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The following will describe the present invention in detail with reference to the accompanying drawings and preferred embodiments. Without conflict, the following embodiments and the features in the embodiments can be supplemented or combined with each other.

[0041] Embodiment 1

[0042] As Figure 1 and Figure 2 shown, a preferred embodiment of the present invention provides a hydraulic lifting device 1, which includes a main hydraulic cylinder 2, a support rod 3, an upper locking mechanism 4, and a lower locking mechanism 5; the upper locking mechanism 4 and the lower locking mechanism 5 are respectively arranged above and below the main hydraulic cylinder 2; the upper locking mechanism 4 is connected to the piston rod 21 of the main hydraulic cylinder, and the lower locking mechanism 5 is connected to the cylinder block of the main hydraulic cylinder 2; and both the upper locking mechanism 4 and the lower locking mechanism 5 are selectively connected to the support rod 3; in addition, one of the upper locking mechanism 4 and the support rod 3 is used to connect to the load.

[0043] The hydraulic lifting device 1 has a load lifting working condition and / or a load lowering working condition.

[0044] In some embodiments, in the load lifting working condition, the upper locking mechanism 4 is separated from the support rod 3 (i.e., the two are not connected), the lower locking mechanism 5 is connected to the support rod 3, the upper locking mechanism 4 is connected to the load, and the main hydraulic cylinder 2 is used to drive the upper locking mechanism 4 to lift the load; in the load lowering working condition, the upper locking mechanism 4 is separated from the support rod 3, the lower locking mechanism 5 is connected to the support rod 3, the upper locking mechanism 4 is connected to the load, and the main hydraulic cylinder 2 is used to drive the upper locking mechanism 4 to lower the load.

[0045] With such a configuration, when the load is connected to the upper locking mechanism 4, the hydraulic lifting device 1 can drive the upper locking mechanism 4 to move up or down through the main hydraulic cylinder 2, and selectively connect to the support rod 3 through the upper locking mechanism 4 and the lower locking mechanism 5, so that the upper locking mechanism 4, the lower locking mechanism 5, and the main hydraulic cylinder 2 can climb or descend on the support rod 3 synchronously or alternately, and the load can be lifted or lowered by driving the upper locking mechanism 4. And the support rod 3 can replace the traditional lifting platform to support the load, the upper locking mechanism 4, the lower locking mechanism 5, and the main hydraulic cylinder 2. In this way, the lifting platform with a large floor area can be saved, and the column skew caused by unilateral lifting of the lifting platform on the column can be prevented, effectively ensuring the safety and reliability during the lifting or lowering process of the load. In addition, all components in the hydraulic lifting device 1 can be recycled, which can not only save energy and protect the environment, but also save the installation period, ensure the installation accuracy, and reduce the influence of the installation equipment on the structure of the load body, thereby filling the technical gap of the climbing hydraulic lifting device.

[0046] It should be understood that the extending cylinder movement of the main hydraulic cylinder 2 refers to the process in which the piston rod 21 of the main hydraulic cylinder gradually extends out of the main hydraulic cylinder 2, and the retracting cylinder movement of the main hydraulic cylinder 2 refers to the process in which the piston rod 21 of the main hydraulic cylinder gradually retracts into the main hydraulic cylinder 2.

[0047] Continue to refer to Figure 1 and Figure 2 As shown, in an example, the support rod 3 sequentially passes through the upper locking mechanism 4, the main hydraulic cylinder 2, and the lower locking mechanism 5. In this embodiment, the support rod 3 is placed vertically, and the piston rod 21 of the main hydraulic cylinder can move in a direction parallel to the extending direction of the support rod 3. The inner cylinder of the main hydraulic cylinder 2 forms a first through hole for sleeving the support rod 3. A second through hole for sleeving the support rod 3 is provided on the upper locking mechanism 4, and a third through hole for sleeving the support rod 3 is provided on the lower locking mechanism 5. The inner diameters of the first through hole, the second through hole, and the third through hole are all slightly larger than the outer diameter of the support rod 3. Optionally, the first through hole, the second through hole, and the third through hole are all cylindrical holes, and the positions of the first through hole, the second through hole, and the third through hole correspond to each other, so that the support rod 3 can pass through the first through hole, the second through hole, and the third through hole and be placed vertically during installation, and the connection point of the load and the upper locking mechanism 4 is also symmetrically arranged relative to the axis of the support rod 3. In this way, the support rod 3 can be prevented from bending or moving during the lifting process of the load, so as to ensure that the piston rod 21 of the main hydraulic cylinder can always move in a direction parallel to the extending direction of the support rod 3.

[0048] Continue to refer to Figure 1 and Figure 2, optionally, the hydraulic lifting device further includes a load connecting seat 6. In a specific embodiment, the load connecting seat 6 is arranged above the upper locking mechanism 4, and the load connecting seat 6 is respectively connected to the upper locking mechanism 4 and the load. Specifically, the load connecting seat 6 is connected to the upper locking mechanism 4 by threads or other means, and the application does not limit the connection method. A first protruding member is arranged on the load connecting seat 6. Preferably, the number of the first protruding members is multiple, and the multiple first protruding members are also symmetrically arranged with respect to the axis of the support rod 3. When installing the load, the load can be first detachably connected to an external second protruding member, and then the load is placed on the load connecting seat 6, and the first protruding member is detachably connected to the second protruding member, so as to realize the installation of the load on the load connecting seat 6. The application does not limit the structures of the first protruding member and the second protruding member. For example, the first protruding member and the second protruding member can be arranged as ear plates or rods, etc. The application also does not limit the connection method between the first protruding member and the second protruding member. Generally, the first protruding member can be mechanically connected to the second protruding member, such as thread connection or pin connection, etc., so that the load can rise or fall under the drive of the load connecting seat 6.

[0049] In some embodiments, a plurality of main connection parts are arranged at intervals in the length direction of the support rod 3. The upper locking mechanism 4 includes a first connection part, and the first connection part is used to cooperate with at least one of the main connection parts to realize the connection between the upper locking mechanism 4 and the support rod 3; the lower locking mechanism 5 includes a second connection part, and the second connection part is used to cooperate with at least one of the main connection parts to realize the connection between the lower locking mechanism 5 and the support rod 3. It should be understood that the application does not limit the structures of the main connection part, the first connection part and the second connection part. In one embodiment, the main connection part may include a groove, and at this time, the first connection part and the second connection part may include bumps that can cooperate with the groove; in another embodiment, the main connection part may include a bump, and at this time, the first connection part and the second connection part may include grooves that can cooperate with the bump. Of course, the structures of the main connection part, the first connection part and the second connection part are not limited to bumps and grooves. The main connection part and the first connection part, and the main connection part and the second connection part can also be arranged as any structures that can be connected to each other.

[0050] In a preferred embodiment, the shape of the first connection part matches the shape of the main connection part; in another preferred embodiment, the shape of the second connection part matches the shape of the main connection part. In this embodiment, the shape of the first connection part matches the shape of the main connection part; and the shape of the second connection part also matches the shape of the main connection part. In this way, when the main connection part is connected to the first connection part or the main connection part is connected to the second connection part, the upper locking mechanism 4 or the lower locking mechanism 5 cannot move relative to the support rod 3, and further, the safety when the load is lifted or lowered can be ensured.

[0051] Referring to Figure 3 、 Figure 4 and Figure 6 As shown, in this embodiment, the main connection portion includes a groove 31, the first connection portion includes a first protrusion 41, the upper locking mechanism 4 further includes a first hydraulic cylinder 42, the first hydraulic cylinder 42 is connected to the first protrusion 41, and the first hydraulic cylinder 42 is used to drive the first protrusion 41 to partially enter or disengage from the groove 31. Specifically, the first protrusion 41 can enter a predetermined groove 31 under the drive of the first hydraulic cylinder 42 to realize the connection between the upper locking mechanism 4 and the support rod 3, and the first protrusion 41 can be stuck in the groove 31 after entering the groove 31 to support the load, the upper locking mechanism 4, the main hydraulic cylinder 2 and the lower locking mechanism 5, so that the load and the upper locking mechanism 4 cannot move relative to the support rod 3. At the same time, the first protrusion 41 can also be disengaged from the groove 31 under the drive of the first hydraulic cylinder 42, so that the upper locking mechanism 4 is separated from the support rod 3 and can slide relative to the support rod 3.

[0052] Furthermore, the second connection portion includes a second protrusion 51, the lower locking mechanism 5 includes a second hydraulic cylinder 52, the second hydraulic cylinder 52 is connected to the second protrusion 51, and the second hydraulic cylinder 52 is used to drive the second protrusion 51 to partially enter or disengage from the groove 31. Specifically, the second protrusion 51 can enter a predetermined groove 31 under the drive of the second hydraulic cylinder 52 to realize the connection between the lower locking mechanism 5 and the support rod 3, and the second protrusion 51 can be stuck in the groove 31 after entering the groove 31 and support the load, the upper locking mechanism 4, the main hydraulic cylinder 2 and the lower locking mechanism 5. At the same time, the second protrusion 51 can also be disengaged from the groove 31 under the drive of the second hydraulic cylinder 52, so that the lower locking mechanism 5 is separated from the support rod 3 and can slide relative to the support rod 3. Of course, in other embodiments, other hydraulic cylinders or air cylinders can also be used to drive the movement of the first protrusion 41 and the second protrusion 51.

[0053] It should be understood that in this application, in order to lift the load, the first protrusion 41 of the upper locking mechanism 4 and the second protrusion 51 of the lower locking mechanism 5 need to successively enter a predetermined groove 31. With such a configuration, on the one hand, when the first protrusion 41 or the second protrusion 51 successively enters the groove 31, the first protrusion 41 or the second protrusion 51 can successively be stuck in the groove 31 to successively support the load, thereby preventing the load from falling; on the other hand, when the first protrusion 41 or the second protrusion 51 disengages from the predetermined groove 31, the upper locking mechanism 4 or the lower locking mechanism 5 can successively climb or descend under the drive of the main hydraulic cylinder 2, so as to realize the lifting or lowering of the load by the hydraulic lifting device 1.

[0054] Referring to Figure 3 and Figure 4As shown, the upper locking mechanism 4 further includes a first mounting member 43 for mounting the first hydraulic cylinder 42, and the lower locking mechanism 5 further includes a second mounting member 53 for mounting the second hydraulic cylinder 52. Continuing to refer to Figure 3 and Figure 4 As shown, the first mounting member 43 may include a first cavity (not labeled) capable of accommodating the first hydraulic cylinder 42 and the first bump 41, thereby avoiding interference between the first bump 41 and the support rod 3 when the first hydraulic cylinder 42 moves to the limit position, and at the same time ensuring the overall structure of the upper locking mechanism 4 is compact. Similarly, the second mounting member 53 may include a second cavity (not labeled) capable of accommodating the second hydraulic cylinder 52 and the second bump 51 to achieve the same purpose.

[0055] In the present application, the number of the first bumps 41 and the first hydraulic cylinders 42 is at least two. In this embodiment, the number of the first bumps 41 and the first hydraulic cylinders 42 is multiple, and the multiple first bumps 41 are distributed along the outer circumferential direction of the support rod 3. Each first bump 41 is connected to the corresponding first hydraulic cylinder 42, and the first hydraulic cylinder 42 is used to drive the corresponding first bump 41 to partially enter or disengage from a predetermined groove 31. Similarly, the present application does not limit the number of the second bumps 51 and the second hydraulic cylinders 52. In this embodiment, the number of the second bumps 51 and the second hydraulic cylinders 52 is multiple, and the multiple second bumps 51 are distributed along the outer circumferential direction of the support rod 3. Each second bump 51 can be connected to the corresponding second hydraulic cylinder 52, and the second hydraulic cylinder 52 is used to drive the corresponding second bump 51 to at least partially enter or disengage from the predetermined groove 31.

[0056] It should be noted that the number of the first bumps 41 and the second bumps 51 may be the same or different, preferably the same, so as to realize the standardized production of the first bumps 41 and the second bumps 51, which is convenient for unified arrangement and centralized control. The first bumps 41 and the second bumps 51 disengaging from the groove 31 means that the first bumps 41 and the second bumps 51 can completely disengage from the groove 31, so that the upper locking mechanism 4 and the lower locking mechanism 5 can move relative to the support rod 3 without obstacles.

[0057] In this embodiment, the groove 31 is an annular groove provided on the outer surface of the support rod 3, and the number of the annular grooves is multiple. The multiple annular grooves are arranged in parallel in the extending direction (i.e., the vertical direction) of the support rod 3. The multiple first bumps 41 can respectively enter or disengage from the same annular groove under the drive of the corresponding first hydraulic cylinders 42; the multiple second bumps 51 can respectively enter or disengage from the same annular groove under the drive of the corresponding second hydraulic cylinders 52. In this way, the contact area between the first bumps 41 and the support rod 3, and between the second bumps 51 and the support rod 3 can be increased, thereby ensuring that the upper locking mechanism 4 and the lower locking mechanism 5 can be more firmly connected to the support rod 3.

[0058] Refer to Figure 3 and Figure 4 As shown, in this embodiment, the number of the first bumps 41 and the first hydraulic cylinders 42 is three each. Each first hydraulic cylinder 42 corresponds to one first bump 41. The three first bumps 41 are all arc-shaped structures and surround the outside of the support rod 3, and there are gaps between adjacent first bumps 41. When the three first bumps 41 reach the position of the predetermined groove 31, the three first bumps 41 can all enter the annular groove under the drive of the corresponding first hydraulic cylinder 42 until the first bump 41 contacts the bottom wall of the groove 31 in the vertical direction, so as to realize the connection between the support rod 3 and the upper locking mechanism 4.

[0059] Further, in this embodiment, the structure of the lower locking mechanism 5 is the same as that of the upper locking mechanism 4, that is, the number of the second bumps 51 and the second hydraulic cylinders 52 in the lower locking mechanism 5 is also three each. Each second hydraulic cylinder 52 corresponds to one second bump 51. The three second bumps 51 are all arc-shaped structures and surround the outside of the support rod 3, and there are gaps between adjacent second bumps 51. When the three second bumps 51 reach the position of the predetermined groove 31, the three second bumps 51 can all enter the corresponding annular groove under the drive of the corresponding second hydraulic cylinder 52, and the second bump 51 contacts the bottom wall of the groove 31 in the vertical direction, so as to realize the connection between the support rod 3 and the lower locking mechanism 5. Of course, in other embodiments, the structure of the lower locking mechanism 5 may also be different from that of the upper locking mechanism 4.

[0060] More preferably, all the first bumps 41 move synchronously, and all the second bumps 51 move synchronously. In a specific embodiment, the chambers of the three first hydraulic cylinders 42 are all connected in parallel; and the chambers of the three second hydraulic cylinders 52 are all connected in parallel, so that the synchronous movement between the three first bumps 41 and the three second bumps 51 can be realized, thereby ensuring that the upper locking mechanism 4 and the lower locking mechanism 5 can be firmly fixed to the support rod 3 when entering the corresponding grooves 31, and further ensuring the reliability and safety of load lifting.

[0061] In a non-limiting embodiment, the process of lifting the load is as follows:

[0062] 1) First, the second bump 51 in the lower locking mechanism 5 synchronously enters the predetermined groove 31 under the drive of the corresponding second hydraulic cylinder 52, so that the lower locking mechanism 5 is connected to the support rod 3. Then, all the first bumps 41 in the upper locking mechanism 4 synchronously disengage from the predetermined groove 31 under the drive of the corresponding first hydraulic cylinder 42, so that the upper locking mechanism 4 is separated from the support rod 3. At this time, the lower locking mechanism 5 is connected to the support rod 3 and can support the main hydraulic cylinder 2, the upper locking mechanism 4, the lower locking mechanism 5 and the load. Then, the main hydraulic cylinder 2 performs an extending cylinder movement. At this time, the upper locking mechanism 4 moves upward relative to the support rod 3 under the drive of the piston rod 21 of the main hydraulic cylinder and lifts the load. When the upper locking mechanism 4 reaches the first predetermined position, the main hydraulic cylinder 2 stops the extending cylinder movement. Subsequently, the first bumps 41 in the upper locking mechanism 4 synchronously enter the predetermined groove 31 under the drive of the corresponding first hydraulic cylinder 42, so that the upper locking mechanism 4 is connected to the support rod 3. At this time, the load stops rising.

[0063] 2) Second, the second bump 51 in the lower locking mechanism 5 is synchronously disengaged from the groove 31 under the drive of the corresponding second hydraulic cylinder 52, so that the lower locking mechanism 5 is separated from the support rod 3. Then, the main hydraulic cylinder 2 performs a retracting cylinder movement. Since the positions of the upper locking mechanism 4 and the piston rod 21 of the main hydraulic cylinder are fixed, the retracting cylinder of the main hydraulic cylinder 2 can move the cylinder body of the main hydraulic cylinder 2 upward and drive the lower locking mechanism 5 to move upward relative to the support rod 3. When the lower locking mechanism 5 reaches the second predetermined position, the main hydraulic cylinder 2 stops the retracting cylinder movement. Subsequently, the second hydraulic cylinder 52 in the lower locking mechanism 5 drives the corresponding second bump 51 to synchronously enter the predetermined groove 31 again, so that the lower locking mechanism 5 is connected to the support rod 3 again.

[0064] 3) Then, the first bumps 41 in the upper locking mechanism 4 are synchronously disengaged from the groove 31 again under the drive of the corresponding first hydraulic cylinder 42, so that the upper locking mechanism 4 is separated from the support rod 3 again. Then, the main hydraulic cylinder 2 performs an extending cylinder movement again. At this time, the upper locking mechanism 4 moves upward relative to the support rod 3 under the drive of the piston rod 21 of the main hydraulic cylinder and lifts the load. After that, repeat the load lifting process in step 1) and step 2) until the load is lifted to the predetermined height.

[0065] Furthermore, when the load is lifted close to the predetermined height, if there is still a certain distance between the actual height of the load and the predetermined height, and the height of the load will be higher than the predetermined height when the upper locking mechanism 4 climbs to the next groove 31 position, at this time, the piston rod 21 of the main hydraulic cylinder can be moved upward to make the load reach the predetermined height. Since the upper locking mechanism 4 has not reached the next groove 31 and cannot be connected to the support rod 3, in order to ensure that the piston rod 21 of the main hydraulic cylinder can temporarily stay at the current position without moving, a hydraulic lock can be set on the main hydraulic cylinder 2. At the same time, a shim can be placed between the upper locking mechanism 4 and the cylinder head of the main hydraulic cylinder 2 to prevent the piston rod 21 of the main hydraulic cylinder from moving downward, so as to ensure that the load can stay at the predetermined height for a long time to facilitate the connection and installation of the load and the load support.

[0066] In a non-limiting embodiment, the process of lowering the load is as follows:

[0067] 1) First, all the first bumps 41 in the upper locking mechanism 4 synchronously enter the predetermined grooves 31 under the drive of the corresponding first hydraulic cylinders 42, so that the upper locking mechanism 4 is connected to the support rod 3. Then, the second bumps 51 in the lower locking mechanism 5 synchronously disengage from the predetermined grooves 31 under the drive of the corresponding second hydraulic cylinders 52, so that the lower locking mechanism 5 is separated from the support rod 3. At this time, the upper locking mechanism 4 is connected to the support rod 3 and can support the main hydraulic cylinder 2, the upper locking mechanism 4, the lower locking mechanism 5 and the load. Then, the main hydraulic cylinder 2 performs an extending cylinder movement. At this time, the lower locking mechanism 5 moves downward relative to the support rod 3 under the drive of the cylinder block of the main hydraulic cylinder 2. When the lower locking mechanism 5 reaches the second predetermined position, the main hydraulic cylinder 2 stops the extending cylinder movement. Subsequently, the second bumps 51 in the lower locking mechanism 5 synchronously enter the predetermined grooves 31 under the drive of the corresponding second hydraulic cylinders 52, so that the lower locking mechanism 5 is connected to the support rod 3.

[0068] 2) Second, the first bumps 41 in the upper locking mechanism 4 are synchronously disengaged from the predetermined grooves 31 under the drive of the corresponding first hydraulic cylinders 42, so that the upper locking mechanism 4 is separated from the support rod 3. Then, the main hydraulic cylinder 2 performs a retracting cylinder movement and drives the upper locking mechanism 4 and the load to move downward. When the upper locking mechanism 4 reaches the first predetermined position, the main hydraulic cylinder 2 stops the retracting cylinder movement. Subsequently, the first hydraulic cylinders 42 in the upper locking mechanism 4 drive the corresponding first bumps 41 to synchronously enter the predetermined grooves 31 again, so that the upper locking mechanism 4 is connected to the support rod 3 again, and at this time the load stops descending.

[0069] 3) Then, the second bumps 51 in the lower locking mechanism 5 are synchronously disengaged from the predetermined grooves 31 under the drive of the corresponding second hydraulic cylinders 52, so that the lower locking mechanism 5 is separated from the support rod 3 again. Then, the main hydraulic cylinder 2 performs an extending cylinder movement. Thereafter, the load lowering process in steps 1) and 2) is repeated until the load is lowered to the predetermined height.

[0070] Generally speaking, when the upper locking mechanism 4 and the lower locking mechanism 5 rise or fall, the height of each climb or fall of the upper locking mechanism 4 and the lower locking mechanism 5 should be determined by the extending height of the main hydraulic cylinder 2. When the first predetermined position when the upper locking mechanism 4 rises or falls is the adjacent groove 31, and the second predetermined position when the lower locking mechanism 5 rises or falls is also the adjacent groove 31, it is preferred that the distance between the adjacent grooves 31 on the support rod 3 is slightly smaller than the stroke of the piston rod 21 of the main hydraulic cylinder, so that each time the main hydraulic cylinder 2 extends its cylinder, it can ensure that there is a certain gap between the first convex block 41 or the second convex block 51 and the groove 31 in the vertical direction when entering the groove 31, so as to facilitate the fine extension or fine retraction of the main hydraulic cylinder 2, thereby transferring the load between the upper locking mechanism 4 and the lower locking mechanism 5. Refer to Figure 6As shown, in this embodiment, the support rod 3 includes a plurality of standard sections 32 connected end to end in sequence. In this way, when the support rod 3 needs to be of different heights, only the number of standard sections 32 needs to be increased or decreased, and the support rod 3 can be conveniently lengthened or shortened according to the height to which the load needs to be lifted. In one embodiment, external threads and internal threads are respectively provided at both ends of each standard section 32, so that a plurality of standard sections 32 can be connected end to end through threads in sequence to form the support rod 3. Further, grooves 31 are provided on the outer periphery of each standard section 32, and preferably the positions of the grooves 31 of all standard sections 32 are the same, so that the distances between adjacent grooves 31 on the support rod 3 are equal, and then the equal-height climbing of the upper locking mechanism 4 can be realized each time the main hydraulic cylinder 2 extends. Further, in order to enable the hydraulic lifting device 1 to lift an oversize or overweight load, the hydraulic lifting device 1 may include multiple sets of lifting mechanisms. Each set of lifting mechanisms includes a main hydraulic cylinder 2, a support rod 3, an upper locking mechanism 4 and a lower locking mechanism 5 that cooperate with each other. Each support rod 3 can bear at least part of the load, and the distances between all the main connecting parts on all support rods 3 are the same (that is, the distances between all the grooves 31 on all support rods 3 are the same). At this time, all the upper locking mechanisms 4 can jointly lift or lower the load. Specifically, at this time, each load connecting seat 6 corresponding to the main hydraulic cylinder 2 in each set of lifting mechanisms can be respectively connected to the load, and at the same time, all the main hydraulic cylinders 2 can drive the load to lift or lower synchronously to ensure that the load does not tilt during the entire lifting or lowering process, so as to ensure the stability of the load lifting. It should be noted that during the lifting or lowering process of the load, if there is a slight difference in the moving speed and moving distance between some main hydraulic cylinders 2 and the remaining main hydraulic cylinders 2, the upper locking mechanism 4 corresponding to the main hydraulic cylinder 2 with a faster moving speed will reach the predetermined groove 31 first and can wait for the main hydraulic cylinder 2 that finally reaches the predetermined groove 31. When all the main hydraulic cylinders 2 reach the same height (that is, all the main hydraulic cylinders 2 reach the predetermined groove 31), all the main hydraulic cylinders 2 will climb synchronously for the next time. In this way, during the climbing or lowering process, it can be ensured that the moving distances of the multiple main hydraulic cylinders 2 are equal after moving a pitch, so that the multiple main hydraulic cylinders 2 can always lift the load synchronously during the load lifting or lowering process, which can further ensure the safety of the load lifting and also ensure the reliability of the operation of the hydraulic lifting device 1. It should be understood that the number of main hydraulic cylinders 2 in the hydraulic lifting device 1 of the present application is not limited, and the number of main hydraulic cylinders 2 can be set according to the weight and size of the load to be lifted.

[0071] Referring to Figure 5 and Figure 6As shown, the hydraulic lifting device 1 may further include a fastener 71 and an attachment rod 72. The fastener 71 can connect to the support rod 3 at the groove 31. One end of the attachment rod 72 is connected to the fastener 71, and the other end is connected to an external fixed structure to define the position of the support rod 3. In this embodiment, the fastener 71 includes a plurality of fixed parts connected end to end in sequence. The plurality of fixed parts can enter the groove 31 and clamp the support rod 3. With such a setting, when the height to which the load is lifted is higher than the stability-limited height of the support rod 3, in order to increase the stability of the support rod 3, the fastener 71 can be clamped to the support rod 3 at the position of the groove 31, and the attachment rod 72 is used to connect the fixed fastener 71 to the external fixed structure to improve the stability of the support rod 3 during the load lifting process. It should be understood that the external fixed structure refers to a position that can remain fixed during the load lifting, such as a wall or a column. It should also be understood that the stability-limited height of the support rod 3 refers to the highest calculated height at which the support rod 3 may become unstable and bend during the load lifting process. In addition, when the lifting height of the load is lower than the stability-limited height of the support rod 3, the fastener 71 and the attachment rod 72 may not be installed on the support rod 3.

[0072] In this embodiment, the number of the attachment rods 72 is two, and the two attachment rods 72 form a 90° angle, which facilitates the fixed connection of the attachment rods 72 to the wall or the column. The application does not limit the number of the attachment rods 72. For example, in other embodiments, the number of the attachment rods 72 can also be set to 1, 3, 4, etc. The application also does not limit the included angle between adjacent attachment rods 72. When the number of the attachment rods 72 is multiple, the included angle between adjacent attachment rods 72 can be set to any required angle according to needs.

[0073] Optionally, the hydraulic lifting device 1 further includes a height difference adjusting screw 8 and a load-bearing base 9. The two ends of the height difference adjusting screw 8 are respectively connected to the support rod 3 and the load-bearing base 9. The height difference adjusting screw 8 is used to adjust the height of the support rod 3 so that the upper locking mechanism 4 can be connected to the load (that is, the height of the first protrusion on the load connecting seat 6 is equal to the connection point height of the second protrusion on the load to facilitate the connection between the load and the load connecting seat 6). The load-bearing base 9 is used to be placed on the concrete ground or the roadbed box and fix the support rod 3 to reduce the ground contact pressure of the load. Refer to Figure 8 and Figure 9 and in combination with Figure 1, in this embodiment, one end of the height difference adjusting screw rod 8 is provided with a right-handed external thread, the other end is provided with a left-handed external thread, and a wrench hole is provided in the middle. One end of the height difference adjusting screw rod 8 with the right-handed external thread is connected to the internal thread at the bottom of the support rod 3, and one end of the height difference adjusting screw rod 8 with the left-handed external thread is connected to the left-handed internal thread of the load-bearing base 9. During actual installation, the initial height of the load connection point can be finely adjusted by adjusting the depth of the right-handed or left-handed rotation of the height difference adjusting screw rod 8 into or out of the support rod 3 and the load-bearing base 9. During the load installation process, it is necessary to first connect the load to the external second protruding member, and then connect the second protruding member on the load and the first protruding member on the load connection seat 6 to complete the installation of the load. When the first protruding member and the second protruding member are connected, it may occur that the heights of the first protruding member and the second protruding member do not match, resulting in the inability to install the load. At this time, the height of the second protruding member can be finely adjusted by controlling the depth of the height difference adjusting screw rod 8 screwed into or out of the load-bearing base 9 and the support rod 3 to complete the connection between the first protruding member and the second protruding member, and then complete the installation of the load. Of course, in other embodiments, the hydraulic lifting device 1 may not include the height difference adjusting screw rod 8, but directly connect the support rod 3 to the load-bearing base 9.

[0074] Referring to Figure 6 shown and in combination with Figure 2 , a preferred embodiment of the present invention further provides a working method of a hydraulic lifting device. Using the hydraulic lifting device 1, the working method of the hydraulic lifting device includes performing the working steps of lifting a load. In a non-limiting embodiment, when the load needs to be lifted, the specific working process of the hydraulic lifting device 1 is as follows:

[0075] 1) Preparation for lifting stage

[0076] Place the support rod 3 near the position where the load needs to be lifted, so that the upper locking mechanism 4 and the lower locking mechanism 5 are in a separated state from the support rod 3. Pass the support rod 3 through the first through hole of the main hydraulic cylinder 2, the second through hole of the upper locking mechanism 4, and the third through hole of the lower locking mechanism 5, and extend the support rod 3 to the required height by connecting multiple standard sections 32. Then connect the upper locking mechanism 4 and the lower locking mechanism 5 to the support rod 3 at the predetermined annular grooves respectively. Connect the load connection seat 6 to the upper part of the upper locking mechanism 4. Use a crane to vertically place the components such as the support rod 3 and connect them to the height difference adjusting screw rod 8 and the load-bearing base 9. Place the load-bearing base 9 on the concrete foundation or the roadbed box and fix it; check the verticality of the support rod 3 and the height of the load connection seat 6, and then weld or bolt-connect the second protruding member on the load to be lifted and pin-connect it to the first protruding member of the load connection seat 6.

[0077] 2) Load lifting stage

[0078] Separate the upper locking mechanism 4 from the support rod 3, and make the main hydraulic cylinder 2 perform an extending cylinder movement. At this time, the lower locking mechanism 5 is in a connected state with the support rod 3, the cylinder block of the main hydraulic cylinder 2 is fixed, and the piston rod 21 of the main hydraulic cylinder drives the upper locking mechanism 4 to move upward relative to the support rod 3. At the same time, the upper locking mechanism 4 drives the load to be lifted synchronously upward; until the upper locking mechanism 4 reaches the first predetermined position and is connected to the support rod 3; then the main hydraulic cylinder 2 slightly retracts the cylinder to separate the lower locking mechanism 5 from the support rod 3, and makes the main hydraulic cylinder 2 perform a retracting cylinder movement again. At this time, the piston rod 21 of the main hydraulic cylinder is fixed, and the cylinder block of the main hydraulic cylinder 2 moves upward and drives the lower locking mechanism 5 to move upward relative to the support rod 3 until the lower locking mechanism 5 reaches the second predetermined position and is connected to the support rod 3; subsequently, the main hydraulic cylinder 2 extends the cylinder to separate the upper locking mechanism 4 from the support rod 3 again, and makes the main hydraulic cylinder 2 perform an extending cylinder movement again to make the upper locking mechanism 4 continue the above climbing process until the load is lifted to the predetermined height. After the lifting is in place, a shim needs to be placed between the upper locking mechanism 4 and the cylinder head of the main hydraulic cylinder 2 and the shim is made to contact both the upper locking mechanism 4 and the cylinder head of the main hydraulic cylinder 2 at the same time, and then the load is connected to the load support.

[0079] It should be noted that when the lifting height of the load is close to the stability-limited height of the support rod 3, the load is in high-position lifting. At this time, fasteners 71 and attachment rods 72 need to be installed at the annular groove at the lower part of the support rod 3 according to calculations to improve the stability of the support rod 3, so as to achieve the high-position safe lifting of the load.

[0080] 3) No-load descent stage

[0081] The main hydraulic cylinder 2 extends slightly to be able to extract the shim placed between the upper locking mechanism 4 and the cylinder head of the main hydraulic cylinder 2. The main hydraulic cylinder 2 retracts slightly to transfer the load to the load support. Then, the connection constraint between the load and the load connection seat 6 is released to disconnect the load. At this time, the upper locking mechanism 4 and the support rod 3 are still in a separated state, the lower locking mechanism 5 and the support rod 3 are in a connected state. The main hydraulic cylinder 2 retracts to the limit position and connects the upper locking mechanism 4 and the support rod 3. The main hydraulic cylinder 2 retracts slightly to separate the lower locking mechanism 5 and the support rod 3, and makes the main hydraulic cylinder 2 extend. The cylinder body of the main hydraulic cylinder 2 drives the lower locking mechanism 5 to move downward relative to the support rod 3 until the lower locking mechanism 5 reaches the second predetermined position and connects with the support rod 3. Then, the main hydraulic cylinder 2 extends slightly to separate the upper locking mechanism 4 and the support rod 3, and makes the main hydraulic cylinder 2 retract. The piston rod 21 of the main hydraulic cylinder drives the upper locking mechanism 4 to move downward relative to the support rod 3 until the upper locking mechanism 4 reaches the first predetermined position and connects with the support rod 3. Subsequently, the main hydraulic cylinder 2 retracts slightly to separate the lower locking mechanism 5 and the support rod 3 again, and makes the main hydraulic cylinder 2 extend again, so that the cylinder body of the main hydraulic cylinder 2 drives the lower locking mechanism 5 to move downward relative to the support rod 3 to continue the above-mentioned descending process of the lower locking mechanism 5 until the upper locking mechanism 4, the main hydraulic cylinder 2 and the lower locking mechanism 5 are lowered to the required height, and all accessories of the hydraulic lifting device 1 are removed.

[0082] Further, when the main hydraulic cylinder 2 descends, along with the descending process of the main hydraulic cylinder 2, a plurality of fasteners 71 and attachment rods 72 can be gradually removed.

[0083] It should be understood that the load descending process is the same as the load ascending process, and the only difference is that when the load descends, the upper locking mechanism 4 needs to be lifted to the height where the load is located, and then the load connection seat 6 is connected to the load.

[0084] It should also be understood that the first predetermined position refers to the position set each time the upper locking mechanism 4 ascends or descends, and each time the upper locking mechanism 4 ascends or descends, the set first predetermined position is different; similarly, the second predetermined position refers to the position set each time the lower locking mechanism 5 ascends or descends, and each time the lower locking mechanism 5 ascends or descends, the set second predetermined position is different. The first predetermined position when the upper locking mechanism 4 ascends or descends each time, and the second predetermined position when the lower locking mechanism 5 ascends or descends each time can be set as needed, and the ascending or descending height of the upper locking mechanism 4 and the lower locking mechanism 5 is the same each time.

[0085] Embodiment 2

[0086] In this embodiment, the same parts as those in Embodiment 1 will not be described in detail and reference can be made to Embodiment 1. Only the differences will be described below.

[0087] Referring to Figure 7 as shown, the difference from the first embodiment is that in this embodiment, in the load lifting condition, the upper locking mechanism 4 is connected to the support rod 3, the lower locking mechanism 5 is fixed on the bottom bracket 10 and separated from the support rod 3, the support rod 3 is connected to the load, the main hydraulic cylinder 2 is used to drive the upper locking mechanism 4 to move upward, and the upper locking mechanism 4 is used to drive the support rod 3 to lift the load; as the upper support rod 3 continuously moves upward, it is necessary to place a standard section 32 into the space below the bottom bracket 10 and connect it to the support rod 3 to meet the need for higher jacking; in the load lowering condition, when the piston rod 21 of the main hydraulic cylinder moves to the limit position, the upper locking mechanism 4 is connected to the support rod 3, the lower locking mechanism 5 is separated from the support rod 3, the support rod 3 is connected to the load, the main hydraulic cylinder 2 is used to drive the upper locking mechanism 4 to move downward, and the upper locking mechanism 4 is used to drive the support rod 3 to lower the load. As the upper support rod 3 continuously moves downward, it is necessary to remove the standard section 32 from the space below the bottom bracket 10 to meet the continuously decreasing space requirement. At this time, the hydraulic lifting device 1 can drive the upper locking mechanism 4 to move upward or downward through the main hydraulic cylinder 2, and intermittently connect the upper locking mechanism 4 to the support rod 3, so that the upper locking mechanism 4 drives the support rod 3 and the load to lift or lower; the lower locking mechanism 5 is intermittently connected to the support rod 3, and when the upper locking mechanism 4 is connected to the support rod 3, the lower locking mechanism 5 is separated from the support rod 3, and when the upper locking mechanism 4 is separated from the support rod 3, the lower locking mechanism 5 is connected to the support rod 3.

[0088] In a specific embodiment, when the support rod 3 is connected to the load, the other end of the lower locking mechanism 5 away from the main hydraulic cylinder 2 can be connected to the bottom bracket 10. Preferably, the bottom bracket 10 is used to be placed on a concrete floor or a roadbed box and fix the lower locking mechanism 5. At this time, the positions of the upper locking mechanism 4, the main hydraulic cylinder 2 and the lower locking mechanism 5 remain unchanged, and the support rod 3 is driven by the main hydraulic cylinder 2 to gradually rise or fall, and then the load is lifted or lowered by driving the support rod 3.

[0089] Referring to Figure 7 as shown and combined with Figure 2 , in a non-limiting embodiment, when the load needs to be lifted, the specific working process of the hydraulic lifting device is as follows:

[0090] 1) Preparation for lifting or lowering stage

[0091] Place the support rod 3 near the position where the load needs to be lifted, so that both the upper locking mechanism 4 and the lower locking mechanism 5 are in a state of being separated from the support rod 3. Pass the support rod 3 through the first through-hole of the hydraulic cylinder, the second through-hole of the upper locking mechanism 4, and the third through-hole of the lower locking mechanism 5, and extend the support rod 3 to the required height by connecting multiple standard sections 32. Then connect the upper locking mechanism 4 and the lower locking mechanism 5 to the support rod 3 at the corresponding annular grooves respectively. Use a crane to vertically lift components such as the support rod 3, place and fix the lower locking mechanism 5 on the bottom bracket 10, and keep the support rod 3 vertically placed with its bottom suspended. At the same time, place the bottom bracket 10 on the concrete foundation or the roadbed box and fix it; check the verticality of the support rod 3 and connect the load to the upper part of the support rod 3.

[0092] 2) Load lifting stage

[0093] Separate the lower locking mechanism 5 from the support rod 3, and make the main hydraulic cylinder 2 perform an extending cylinder movement. At this time, the cylinder block of the main hydraulic cylinder 2 remains stationary, and the piston rod 21 of the main hydraulic cylinder drives the upper locking mechanism 4 and the support rod 3 to move upward. The upper locking mechanism 4 drives the support rod 3 and the load to move upward synchronously to achieve the lifting of the load; when the piston rod 21 of the main hydraulic cylinder moves to the third predetermined position, connect the lower locking mechanism 5 to the support rod 3; then the main hydraulic cylinder 2 slightly contracts the cylinder to separate the upper locking mechanism 4 from the support rod 3, and make the main hydraulic cylinder 2 perform a contracting cylinder movement. The piston rod 21 of the main hydraulic cylinder drives the upper locking mechanism 4 to move downward until the upper locking mechanism 4 reaches the fourth predetermined position, and then connect the upper locking mechanism 4 to the support rod 3 again; subsequently, the main hydraulic cylinder 2 slightly extends the cylinder to separate the lower locking mechanism 5 from the support rod 3 again, and make the main hydraulic cylinder 2 perform an extending cylinder movement, and repeat the above process of the up and down movement of the upper locking mechanism 4 until the load is lifted to the required height. Then place a shim between the upper locking mechanism 4 and the cylinder head of the main hydraulic cylinder 2, and make the shim contact both the upper locking mechanism 4 and the cylinder head of the main hydraulic cylinder 2 at the same time. Then connect the load to the load support.

[0094] 3) No-load descending stage

[0095] The main hydraulic cylinder 2 extends slightly to extract the shim at the bottom of the upper locking mechanism 4, then the main hydraulic cylinder 2 contracts slightly to transfer the load to the load support, and then the connection constraint between the load and the load connection seat 6 is released to disconnect from the load. At this time, the upper locking mechanism 4 and the support rod 3 are still connected, the lower locking mechanism 5 and the support rod 3 are separated, the main hydraulic cylinder 2 contracts to the limit position, and the lower locking mechanism 5 is connected to the support rod 3, and then the main hydraulic cylinder 2 contracts slightly to separate the upper locking mechanism 4 from the support rod 3; the main hydraulic cylinder 2 makes an extending motion. When the piston rod 21 of the main hydraulic cylinder drives the upper locking mechanism 4 to move upward to the third predetermined position, the upper locking mechanism 4 is connected to the support rod 3; then the main hydraulic cylinder 2 extends slightly to separate the lower locking mechanism 5 from the support rod 3, and the main hydraulic cylinder 2 makes a contracting motion. The piston rod 21 of the main hydraulic cylinder drives the upper locking mechanism 4 and the support rod 3 to move downward until the upper locking mechanism 4 moves downward to the fourth predetermined position, then the lower locking mechanism 5 is connected to the support rod 3, the main hydraulic cylinder 2 contracts slightly and separates the upper locking mechanism 4 from the support rod 3 again, and at the same time the main hydraulic cylinder 2 makes an extending motion, and repeats the above process of the up and down movement of the upper locking mechanism 4 until the support rod 3 is lowered to the required height.

[0096] It should be noted that during the rising process of the support rod 3, standard sections 32 need to be successively added to the lower end of the support rod 3 to gradually lengthen the support rod 3; during the gradual descending process of the support rod 3, the standard sections 32 need to be successively disassembled from the lower end of the support rod 3 to gradually shorten the support rod 3.

[0097] It should be understood that compared with the working process of the load rising, the difference in the working process of the load descending is only that: after the support rod 3 is lifted to the height where the load is located; the load is connected to the support rod 3, and then the load and the support rod are gradually lowered to the predetermined height of the load.

[0098] It should also be understood that when the rising height of the support rod 3 approaches the height limit of the stability of the support rod 3, the stability of the support rod 3 begins to deteriorate. At this time, the support rod 3 may become unstable and bend, and may move or shake in the vertical direction. Therefore, the scheme of driving the load to move by the movement of the support rod 3 can only be applied to the case where the required lifting height of the load is small.

[0099] In addition, the third predetermined position refers to the position set each time the upper locking mechanism 4 rises, and each time the upper locking mechanism 4 rises, the set third predetermined position may be the same or different; the fourth predetermined position refers to the position set each time the upper locking mechanism 4 descends, and each time the upper locking mechanism 4 descends, the set fourth predetermined position may be the same or different. The third predetermined position when the upper locking mechanism 4 rises each time, and the fourth predetermined position when the upper locking mechanism 4 descends each time can be set as needed.

[0100] In summary, for the hydraulic lifting device 1 and the working method provided by the present invention, when the load is connected to the upper locking mechanism 4, the hydraulic lifting device 1 can drive the upper locking mechanism 4 to move up or down through the main hydraulic cylinder 2, and selectively connect to the support rod 3 through the upper locking mechanism 4 and the lower locking mechanism 5, so that the upper locking mechanism 4, the lower locking mechanism 5, and the main hydraulic cylinder 2 can climb or descend on the support rod 3 synchronously or alternately, and the load can be lifted or lowered by driving the upper locking mechanism 4. And the support rod 3 can replace the traditional lifting platform to support the load, the upper locking mechanism 4, the lower locking mechanism 5, and the main hydraulic cylinder 2. In this way, the lifting platform with a large floor area can be saved, and the column deflection caused by setting a single-sided lifting platform on the column can be prevented, effectively ensuring the safety and reliability during the lifting or lowering process of the load. When the load is connected to the support rod 3, the hydraulic lifting device 1 can drive the upper locking mechanism 4 to move up or down through the main hydraulic cylinder 2, and intermittently connect to the support rod 3 through the upper locking mechanism 4, so that the upper locking mechanism 4 drives the support rod 3 and the load to lift or lower. In addition, all components in the hydraulic lifting device 1 can be recycled, which can not only save energy and protect the environment, but also save the installation period, ensure the installation accuracy, and reduce the influence of the installation equipment on the structure of the load body, thereby filling the technical gap of the climbing hydraulic lifting device.

[0101] The hydraulic lifting device 1 provided by the present invention can use multiple sets of lifting mechanisms to jointly lift or lower the load. Since a plurality of main connection parts are arranged at intervals in the extending direction of the support rod 3, and the distances between all the main connection parts on the support rod 3 in each set of lifting mechanisms are the same, so that each main hydraulic cylinder 2 in each set of lifting mechanisms can ensure that the moving distances between the main hydraulic cylinders 2 are equal after each moving a distance, and can ensure that multiple main hydraulic cylinders 2 can always lift the load synchronously during the load lifting process, further ensuring the smoothness of the load lifting and the reliability of the operation of the hydraulic lifting device 1.

[0102] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the field of the present invention according to the above disclosure shall fall within the protection scope of the present invention.

Claims

1. A hydraulic lifting device, characterized in that, it includes a main hydraulic cylinder, a support rod, an upper locking mechanism and a lower locking mechanism; the upper locking mechanism and the lower locking mechanism are respectively arranged above and below the main hydraulic cylinder; the upper locking mechanism is connected to the piston rod of the main hydraulic cylinder, and the lower locking mechanism is connected to the cylinder block of the main hydraulic cylinder; and both the upper locking mechanism and the lower locking mechanism are selectively connected to the support rod, and one of the upper locking mechanism and the support rod is used to connect to the load; the hydraulic lifting device has a load lifting condition and / or a load lowering condition; in the load lifting condition, the upper locking mechanism is separated from the support rod, the lower locking mechanism is connected to the support rod, the upper locking mechanism is connected to the load, and the main hydraulic cylinder is used to drive the upper locking mechanism to lift the load, or, the upper locking mechanism is connected to the support rod, the lower locking mechanism is separated from the support rod, the support rod is connected to the load, and the main hydraulic cylinder is used to drive the upper locking mechanism to drive the support rod to lift the load; in the load lowering condition, the upper locking mechanism is separated from the support rod, the lower locking mechanism is connected to the support rod, the upper locking mechanism is connected to the load, and the main hydraulic cylinder is used to drive the upper locking mechanism to lower the load, or, the upper locking mechanism is connected to the support rod, the lower locking mechanism is separated from the support rod, the support rod is connected to the load, and the main hydraulic cylinder is used to drive the upper locking mechanism to drive the support rod to lower the load.

2. The hydraulic lifting device according to claim 1, characterized in that, the support rod sequentially passes through the upper locking mechanism, the main hydraulic cylinder and the lower locking mechanism.

3. The hydraulic lifting device according to claim 1, characterized in that, a plurality of main connection parts are equidistantly arranged on the support rod in its own length direction; the upper locking mechanism includes a first connection part, and the first connection part is used to cooperate and connect with at least one of the main connection parts; the lower locking mechanism includes a second connection part, and the second connection part is used to cooperate and connect with at least one of the main connection parts; the shape of the first connection part matches the shape of the main connection part, and / or, the shape of the second connection part matches the shape of the main connection part.

4. The hydraulic lifting device according to claim 3, characterized in that, the main connection part includes a groove, the first connection part includes a first convex block, and the second connection part includes a second convex block; the upper locking mechanism further includes a first hydraulic cylinder, the first hydraulic cylinder is connected to the first convex block, and the first hydraulic cylinder is used to drive the first convex block to partially enter or disengage from the groove, the lower locking mechanism includes a second hydraulic cylinder, the second hydraulic cylinder is connected to the second convex block, and the second hydraulic cylinder is used to drive the second convex block to partially enter or disengage from the groove.

5. The hydraulic lifting device according to claim 4, characterized in that, The groove is an annular groove provided on the outer surface of the support rod; the number of the first bumps and the first hydraulic cylinders is multiple, and the multiple first bumps are distributed along the circumferential direction of the support rod, and each first bump is connected to a corresponding first hydraulic cylinder, and the multiple first bumps can enter or disengage from the same annular groove synchronously under the drive of the corresponding first hydraulic cylinders; the number of the second bumps and the second hydraulic cylinders is multiple, and the multiple second bumps are distributed along the circumferential direction of the support rod, and each second bump is connected to a corresponding second hydraulic cylinder, and the multiple second bumps can enter or disengage from the same annular groove synchronously under the drive of the corresponding second hydraulic cylinders.

6. The hydraulic lifting device according to claim 1, characterized in that the support rod comprises a plurality of standard sections connected end to end in sequence.

7. The hydraulic lifting device according to claim 1, characterized in that it includes a plurality of the main hydraulic cylinders, a plurality of the support rods, a plurality of the upper locking mechanisms and a plurality of the lower locking mechanisms, and each main hydraulic cylinder is used in cooperation with a corresponding one of the support rods, an upper locking mechanism and a lower locking mechanism; each support rod can bear at least part of the load, and a plurality of main connection parts are arranged at equal intervals in the extending direction of each support rod, and the intervals of all the main connection parts on all the support rods are the same, and all the upper locking mechanisms can lift or lower the load together.

8. The hydraulic lifting device according to any one of claims 1-7, characterized in that when the upper locking mechanism is connected to the load, the hydraulic lifting device further comprises a height difference adjusting screw and a load-bearing base, the two ends of the height difference adjusting screw are respectively connected to the support rod and the load-bearing base, the height difference adjusting screw is used for adjusting the height of the support rod so that the upper locking mechanism can be connected to the load, and the load-bearing base is used for being placed on a concrete floor or a roadbed box and fixing the support rod.

9. The hydraulic lifting device according to any one of claims 1-7, characterized in that when the support rod is connected to the load, the hydraulic lifting device comprises a bottom bracket, the bottom bracket is connected to the lower locking mechanism, and the bottom bracket is used for being placed on a concrete floor or a roadbed box and fixing the lower locking mechanism.

10. A working method of a hydraulic lifting device, adopting the hydraulic lifting device according to any one of claims 1-9, characterized in that it includes the working steps of lifting the load, including; separating the upper locking mechanism from the support rod, connecting the lower locking mechanism to the support rod, and connecting the upper locking mechanism to the load; the main hydraulic cylinder performs a telescopic cylinder movement to drive the upper locking mechanism to drive the load to rise until the upper locking mechanism reaches a first predetermined position and then is connected to the support rod; After the main hydraulic cylinder retracts to separate the lower locking mechanism from the support rod, the main hydraulic cylinder retracts again to drive the lower locking mechanism to move upward relative to the support rod until the lower locking mechanism reaches the second predetermined position and is connected to the support rod; After the main hydraulic cylinder extends to release the connection between the upper locking mechanism and the support rod at the first predetermined position, the main hydraulic cylinder extends again to drive the upper locking mechanism to lift the load; Alternatively, connect the upper locking mechanism to the support rod, separate the lower locking mechanism from the support rod, and connect the support rod to the load; The main hydraulic cylinder extends to drive the upper locking mechanism and the support rod to drive the load upward until the lower locking mechanism reaches the third predetermined position and is connected to the support rod; After the main hydraulic cylinder retracts to separate the upper locking mechanism from the support rod, the main hydraulic cylinder retracts to drive the upper locking mechanism to reach the fourth predetermined position and be connected to the support rod; After the main hydraulic cylinder extends to separate the lower locking mechanism from the support rod, the main hydraulic cylinder extends to drive the upper locking mechanism to drive the support rod to lift the load.

11. A working method of a hydraulic lifting device, using the hydraulic lifting device according to any one of claims 1-9, characterized in that, it includes the working steps of executing the lowering of the load, including; Connect the upper locking mechanism to the support rod, retract the main hydraulic cylinder to separate the lower locking mechanism from the support rod, and connect the upper locking mechanism to the load; The main hydraulic cylinder extends to drive the lower locking mechanism to move downward relative to the support rod until the lower locking mechanism reaches the second predetermined position and is connected to the support rod; After the main hydraulic cylinder extends to separate the upper locking mechanism from the support rod, the main hydraulic cylinder retracts to drive the upper locking mechanism to drive the load downward until the upper locking mechanism reaches the first predetermined position and is connected to the support rod; After the main hydraulic cylinder retracts to separate the lower locking mechanism from the support rod, the main hydraulic cylinder extends to drive the lower locking mechanism to move downward; Alternatively, the lower locking mechanism is connected to the support rod, the main hydraulic cylinder retracts to separate the upper locking mechanism from the support rod, and the support rod is connected to the load; The main hydraulic cylinder extends to drive the upper locking mechanism to move upward until the upper locking mechanism reaches the third predetermined position and is connected to the support rod; After the main hydraulic cylinder extends to separate the lower locking mechanism from the support rod, the main hydraulic cylinder retracts to drive the upper locking mechanism and the support rod to drive the load downward until the upper locking mechanism reaches the fourth predetermined position and the lower locking mechanism is connected to the support rod; After the main hydraulic cylinder retracts to separate the upper locking mechanism from the support rod, the main hydraulic cylinder extends to drive the upper locking mechanism to move upward.

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