A lifting device for construction

Abstract

The present invention discloses a lifting device for building construction, which relates to the technical field of building construction, including a lifting mechanism; a protective mechanism is installed on the lifting mechanism, and the protective mechanism is used to prevent building materials in the lifting mechanism from falling; a supporting mechanism is installed at the bottom of the lifting mechanism; connecting mechanisms are installed on the front and rear sides of the lifting mechanism respectively, and two groups of the connecting mechanisms are used to connect the lifting mechanism and the supporting mechanism; the movable blocking cover is slidably installed on the outside of the rectangular frame, and the top of the rectangular frame is flush with the top of the movable blocking cover; the rectangular limit blocks are provided in two rows, and the two rows of rectangular limit blocks are fixedly installed on the front and rear sides of the rectangular frame; the present invention ensures that there must be a certain distance between the building materials and the top of the movable blocking cover, thereby reducing the occurrence of building materials falling; it solves the problem that too much building materials are easily placed when placed, which makes the building materials easy to fall during lifting.

Description

Technical Field

[0001] The present invention belongs to the technical field of building construction, and more specifically, relates to a lifting device for building construction. Background Art

[0002] Construction refers to the production activities during the implementation phase of engineering construction. It is the construction process of various buildings. It can also be said to be the process of turning various lines on the design drawings into physical objects at designated locations. Moving building materials from the ground or low places to high places, or from one place to another through lifting is a normal operation in construction.

[0003] The lifting devices currently used still have the following problems:

[0004] 1. It is easy to place too many building materials when placing them, which may cause them to fall when lifting;

[0005] 2. When lifting building materials, the top of the building materials cannot be automatically blocked, which poses a safety hazard;

[0006] 3. The staff needs to observe the skewness of the building materials after lifting, and then adjust the lifting position. The lifting position cannot be adjusted in advance, which reduces the lifting efficiency;

[0007] 4. It is inconvenient for workers to pre-sort the building materials to be lifted, and it is also inconvenient to quickly unload the lifted building materials, which affects the lifting efficiency. To this end, we provide a lifting device for construction to solve the above problems. Summary of the Invention

[0008] The purpose of the present invention is to make up for the deficiencies of the prior art and provide a lifting device for construction, which has a lifting mechanism, a protective mechanism, a supporting mechanism and a connecting mechanism; ensures that there must be a certain distance between the building materials and the top of the movable blocking cover, thereby reducing the occurrence of building materials falling; plays a blocking role on the building materials, preventing them from falling during lifting; realizes the pre-adjustment of the lifting position, thereby improving the lifting efficiency of building materials; saves the time for placing and removing building materials, thereby improving the lifting efficiency of building materials; solves the problems of excessive placement of building materials, inability to automatically block the top of the building materials, inability to pre-adjust the lifting position, and inability to save the time for placing and removing building materials.

[0009] To solve the above technical problems, the present invention provides the following technical solutions: a lifting device for construction, comprising a lifting mechanism; a protective mechanism installed on the lifting mechanism, the protective mechanism being used to prevent building materials in the lifting mechanism from falling; a supporting mechanism installed at the bottom of the lifting mechanism; connecting mechanisms installed on the front and rear sides of the lifting mechanism, respectively, two sets of the connecting mechanisms being used to connect the lifting mechanism and the supporting mechanism;

[0010] The lifting mechanism includes: a rectangular frame, a movable blocking cover and a rectangular limit block; the movable blocking cover is slidably installed on the outside of the rectangular frame, and the top of the rectangular frame is flush with the top of the movable blocking cover; the rectangular limit blocks are provided in two rows, and the two rows of rectangular limit blocks are fixedly installed on the front and rear sides of the rectangular frame, and the two rows of rectangular limit blocks are also slidably connected to the movable blocking cover.

[0011] Furthermore, the lifting mechanism also includes: a lifting bracket and an adjustable lifting seat; the lifting bracket is fixedly installed on the top of the movable blocking cover; and the adjustable lifting seat is slidably installed on the lifting bracket.

[0012] Furthermore, the lifting mechanism also includes: a positioning pin and a circular magnet; the positioning pin is inserted into the interior of the lifting bracket and the adjustable lifting seat; the circular magnet is fixedly mounted on the positioning pin, and the inner side of the circular magnet is in contact with the lifting bracket.

[0013] Furthermore, the protection mechanism includes: a rectangular mounting block and a movable protection frame; there are two rectangular mounting blocks, and the two rectangular mounting blocks are fixedly mounted on the top of the movable blocking cover; the movable protection frame is rotatably mounted on the two rectangular mounting blocks.

[0014] Furthermore, the protective mechanism also includes: a driving rack and a driving gear; there are two driving racks, and the two driving racks are fixedly installed on the top of the rectangular frame; there are two driving gears, and the two driving gears are fixedly installed on the movable protective frame, and the two driving gears are meshed and connected with the two driving racks.

[0015] Furthermore, when the tops of the two rows of rectangular limit blocks are in contact with the movable blocking cover, the movable protective frame is in a vertical state; when the bottoms of the two rows of rectangular limit blocks are in contact with the movable blocking cover, the movable protective frame is in a horizontal state.

[0016] Furthermore, the support mechanism includes: a support base and a rectangular mounting plate; the support base is slidably mounted on the bottom of the rectangular frame, and two arc-shaped protrusions are provided at the bottom center of the support base; the rectangular mounting plate is fixedly mounted on the support base.

[0017] Furthermore, the support mechanism also includes: circular guide rods, movable sealing plates and coil springs A; the circular guide rods are provided in a row, and a row of circular guide rods is slidably mounted on a rectangular mounting plate; the movable sealing plate is fixedly mounted on a row of circular guide rods, and the outer wall of the movable sealing plate is in contact with the support base; the coil springs A are provided in a row, and a row of coil springs A is sleeved on the outside of a row of circular guide rods, and a row of coil springs A is located between the rectangular mounting plate and the movable sealing plate.

[0018] Furthermore, the connecting mechanism includes: a mounting frame and a movable connecting frame; the mounting frame is fixedly mounted on the outer wall of the rectangular frame; the movable connecting frame is slidably mounted on the mounting frame and the rectangular frame, and the inner end of the movable connecting frame is provided with a chamfer, and the inner end of the movable connecting frame is inserted into the support base.

[0019] Furthermore, the connecting mechanism also includes: a reset plate and a coil spring B; the reset plate is fixedly mounted on the movable connecting frame, and the inner side of the reset plate contacts the rectangular frame; the coil springs B are provided in a row, and a row of coil springs B is sleeved on the outside of the movable connecting frame, and a row of coil springs B is located between the mounting frame and the reset plate.

[0020] Compared with the existing technology, the lifting device for construction has the following beneficial effects:

[0021] 1. The present invention facilitates the staff to appropriately adjust the position of the adjustable lifting seat, changes the center of gravity position of the building materials during lifting, and is conducive to improving the stability during lifting; the provision of the circular magnet plays a limiting role on the positioning pin, preventing the positioning pin from falling off; when the hook on the lifting equipment drives the adjustable lifting seat to move upward, the rectangular frame first remains stationary, so that the top of the movable blocking cover is higher than the top of the rectangular frame, ensuring that there must be a certain distance between the building materials and the top of the movable blocking cover, reducing the occurrence of building materials falling; when the bottom of the two rows of rectangular limit blocks contacts the movable blocking cover, the rectangular frame and the movable blocking cover move upward at the same time.

[0022] 2. In the present invention, when the bottom of the two rows of rectangular limit blocks are in contact with the movable blocking cover, the movable protective frame is in a horizontal state, which blocks the building materials and prevents them from falling during lifting; when the top of the two rows of rectangular limit blocks are in contact with the movable blocking cover, the movable protective frame is in a vertical state, which makes it convenient for workers to place and take out the building materials in the rectangular frame.

[0023] 3. Rainwater on the building materials of the present invention can flow downward through a row of slots, which has a centralized collection effect on the rainwater on the building materials; when the collected rainwater needs to be cleaned, the staff presses down one or more circular guide rods, at this time, the movable sealing plate moves downward, so that a gap is generated between the movable sealing plate and the support base, and the collected rainwater can be discharged through the gap, avoiding the rainwater on the building materials from dripping during lifting; when the lifting mechanism is slightly tilted to the left under the action of the two arc-shaped protrusions, it means that the center of gravity of the building materials is located to the left of the center ... When the structure tilts slightly to the right under the action of the two arc-shaped protrusions, it means that the center of gravity of the building material is located to the right of the center. At this time, the staff presses the lifting mechanism to tilt the lifting mechanism to the other side. The staff judges the approximate position of the center of gravity of the building material based on the pressing force. When the pressing force is large, the position of the adjustable lifting seat can be adjusted more; when the pressing force is normal, the position of the adjustable lifting seat can be slightly adjusted; when the pressing force is small, the position of the adjustable lifting seat does not need to be adjusted, thereby realizing the pre-adjustment of the lifting position and improving the lifting efficiency of the building materials.

[0024] Fourth, the provision of the movable connecting frame of the present invention serves to limit the support base, making it easier for the staff to connect the support base to the rectangular frame; the provision of a row of coil springs B enables the movable connecting frame to move only when a force is applied, thereby ensuring the connection between the support base and the rectangular frame;

[0025] In addition, when the building materials are of a rectangular structure and it is convenient for the workers to arrange the building materials in order, after the lifting is completed, the workers can pull the two movable connecting frames outward to separate the support base from the rectangular frame, which is convenient for the rapid unloading of the building materials; at the same time, when the building materials are lifted, the workers can pre-arrange the building materials on another set of supporting mechanisms, which saves the time for placing and removing the building materials and improves the lifting efficiency of the building materials.

[0026] Other advantages, objects and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be learned from the practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Shows a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 It shows the structural schematic diagram of the lifting mechanism in the present invention;

[0029] Figure 3 The present invention is shown Figure 1 Schematic diagram of the local enlarged structure of area A in the middle;

[0030] Figure 4 The present invention is shown Figure 1 Schematic diagram of the bottom perspective structure;

[0031] Figure 5 shows a schematic structural diagram of the support mechanism in the present invention;

[0032] Figure 6 The present invention is shown Figure 1 Schematic diagram of the central cross-section structure;

[0033] Figure 7 The present invention is shown Figure 6 Schematic diagram of the local enlarged structure of area B in the middle;

[0034] Figure 8 The present invention is shown Figure 6 Schematic diagram of the locally enlarged structure of the middle C area.

[0035] In the picture:

[0036] 100. Lifting mechanism; 101. Rectangular frame; 102. Movable blocking cover; 103. Rectangular limit block; 104. Lifting bracket; 105. Adjustable lifting seat; 106. Positioning pin; 107. Round magnet;

[0037] 200, protective mechanism; 201, rectangular mounting block; 202, movable protective frame; 203, driving rack; 204, driving gear;

[0038] 300, support mechanism; 301, support base; 3011, arc-shaped protrusion; 302, rectangular mounting plate; 303, circular guide rod; 304, movable sealing plate; 305, coil spring A;

[0039] 400. Connecting mechanism; 401. Mounting frame; 402. Movable connecting frame; 403. Reset plate; 404. Coil spring B. DETAILED DESCRIPTION

[0040] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] See also Figures 1-8The present invention provides the following technical solutions: a lifting device for construction, comprising a lifting mechanism 100; a protective mechanism 200 is installed on the lifting mechanism 100, and the protective mechanism 200 is used to prevent building materials in the lifting mechanism 100 from falling; a supporting mechanism 300 is installed at the bottom of the lifting mechanism 100; connecting mechanisms 400 are respectively installed on the front and rear sides of the lifting mechanism 100, and two sets of connecting mechanisms 400 are used to connect the lifting mechanism 100 and the supporting mechanism 300.

[0042] Please refer to Figure 2 The lifting mechanism 100 includes: a rectangular frame 101, a movable blocking cover 102 and a rectangular limiting block 103; the movable blocking cover 102 is slidably mounted on the outside of the rectangular frame 101, and the top of the rectangular frame 101 is flush with the top of the movable blocking cover 102; the rectangular limiting blocks 103 are provided in two rows, and the two rows of rectangular limiting blocks 103 are fixedly mounted on the front and rear sides of the rectangular frame 101, and the two rows of rectangular limiting blocks 103 are also slidably connected to the movable blocking cover 102; the lifting mechanism 100 also The lifting mechanism 100 includes: a lifting bracket 104 and an adjustable lifting seat 105; the lifting bracket 104 is fixedly mounted on the top of the movable blocking cover 102; the adjustable lifting seat 105 is slidably mounted on the lifting bracket 104; the lifting mechanism 100 also includes: a positioning pin 106 and a circular magnet 107; the positioning pin 106 is inserted into the interior of the lifting bracket 104 and the adjustable lifting seat 105; the circular magnet 107 is fixedly mounted on the positioning pin 106, and the inner side of the circular magnet 107 is in contact with the lifting bracket 104;

[0043] Its specific functions are as follows: because the adjustable lifting seat 105 is slidably mounted on the lifting bracket 104, and the positioning pin 106 is inserted into the interior of the lifting bracket 104 and the adjustable lifting seat 105, it is convenient for the staff to properly adjust the position of the adjustable lifting seat 105, which changes the center of gravity position during the lifting of building materials, which is conducive to improving the stability during lifting; the setting of the circular magnet 107 has a limiting effect on the positioning pin 106, preventing the positioning pin 106 from falling off; and because the movable blocking cover 102 is slidably mounted on the outside of the rectangular frame 101, and the two rows of rectangular limit blocks 103 are fixedly mounted The front and rear sides of the rectangular frame 101, and the two rows of rectangular limit blocks 103 are also slidably connected to the movable blocking cover 102. When the hook on the lifting equipment drives the adjustable lifting seat 105 to move upward, the rectangular frame 101 first remains stationary, so that the top of the movable blocking cover 102 is higher than the top of the rectangular frame 101, ensuring that there must be a certain distance between the building materials and the top of the movable blocking cover 102, reducing the occurrence of building materials falling; when the bottom of the two rows of rectangular limit blocks 103 contacts the movable blocking cover 102, the rectangular frame 101 and the movable blocking cover 102 move upward at the same time.

[0044] Please refer to Figure 3The protective mechanism 200 includes: a rectangular mounting block 201 and a movable protective frame 202; there are two rectangular mounting blocks 201, and the two rectangular mounting blocks 201 are fixedly mounted on the top of the movable blocking cover 102; the movable protective frame 202 is rotatably mounted on the two rectangular mounting blocks 201; the protective mechanism 200 also includes: a driving rack 203 and a driving gear 204; there are two driving racks 203, and the two driving racks 203 are fixedly mounted on the top of the rectangular frame 101; there are two driving gears 204, and the two driving gears 204 are fixedly mounted on the movable protective frame 202, and the two driving gears 204 are meshed and connected with the two driving racks 203; when the tops of the two rows of rectangular limit blocks 103 are in contact with the movable blocking cover 102, the movable protective frame 202 is in a vertical state; when the bottoms of the two rows of rectangular limit blocks 103 are in contact with the movable blocking cover 102, the movable protective frame 202 is in a horizontal state;

[0045] Its specific function is: because the two driving racks 203 are fixedly mounted on the top of the rectangular frame 101, and the two driving gears 204 are fixedly mounted on the movable protective frame 202, and the two driving gears 204 are meshed and connected with the two driving racks 203, when the bottoms of the two rows of rectangular limit blocks 103 are in contact with the movable blocking cover 102, the movable protective frame 202 is in a horizontal state, which blocks the building materials and prevents them from falling during lifting; when the tops of the two rows of rectangular limit blocks 103 are in contact with the movable blocking cover 102, the movable protective frame 202 is in a vertical state, which is convenient for the staff to place and take out the building materials in the rectangular frame 101.

[0046] Please refer to Figure 4 、 Figure 5 and Figure 7 The support mechanism 300 includes: a support base 301 and a rectangular mounting plate 302; the support base 301 is slidably mounted on the bottom of the rectangular frame 101, and two arc-shaped protrusions 3011 are provided at the center of the bottom of the support base 301; the rectangular mounting plate 302 is fixedly mounted on the support base 301; the support mechanism 300 also includes: a circular guide rod 303, a movable sealing plate 304 and a coil spring A305; the circular guide rods 303 are provided in a row, and a row of circular guide rods 303 are slidably mounted on the rectangular mounting plate 302; the movable sealing plate 304 is fixedly mounted on a row of circular guide rods 303, and the outer wall of the movable sealing plate 304 is in contact with the support base 301; the coil spring A305 is provided in a row, and a row of coil springs A305 is sleeved on the outside of a row of circular guide rods 303, and a row of coil springs A305 is located between the rectangular mounting plate 302 and the movable sealing plate 304;

[0047] Its specific function is as follows: because a row of slots are provided on the support base 301, rainwater on the building materials can flow downward through the row of slots, which has the effect of collecting the rainwater on the building materials; when the collected rainwater needs to be cleaned, the staff presses one or more circular guide rods 303 downward, at this time, the movable sealing plate 304 moves downward, so that a gap is generated between the movable sealing plate 304 and the support base 301, and the collected rainwater can be discharged through the gap, avoiding the rainwater on the building materials from dripping during lifting; and because two arc-shaped protrusions 3011 are provided at the center of the bottom of the support base 301, it is convenient for the staff to judge the center of gravity position when the building materials are lifted. When the lifting mechanism 100 is at the two arc-shaped protrusions 301 1, it indicates that the center of gravity of the building material is located to the left of the center; when the lifting mechanism 100 is slightly tilted to the right under the action of the two arc-shaped protrusions 3011, it indicates that the center of gravity of the building material is located to the right of the center. At this time, the staff presses the lifting mechanism 100 to tilt the lifting mechanism 100 to the other side. The staff judges the approximate position of the center of gravity of the building material according to the pressing force. When the pressing force is large, the position of the adjustable lifting seat 105 can be adjusted more; when the pressing force is normal, the position of the adjustable lifting seat 105 can be slightly adjusted; when the pressing force is small, the position of the adjustable lifting seat 105 does not need to be adjusted, thereby realizing the pre-adjustment of the lifting position and improving the lifting efficiency of the building materials.

[0048] Please refer to Figure 1 and Figure 8 The connecting mechanism 400 includes: a mounting frame 401 and a movable connecting frame 402; the mounting frame 401 is fixedly mounted on the outer wall of the rectangular frame 101; the movable connecting frame 402 is slidably mounted on the mounting frame 401 and the rectangular frame 101, and the inner end of the movable connecting frame 402 is provided with a chamfer, and the inner end of the movable connecting frame 402 is inserted into the supporting base 301; the connecting mechanism 400 also includes: a reset plate 403 and a coil spring B404; the reset plate 403 is fixedly mounted on the movable connecting frame 402, and the inner side of the reset plate 403 is in contact with the rectangular frame 101; the coil springs B404 are provided in a row, and a row of coil springs B404 is sleeved on the outside of the movable connecting frame 402, and a row of coil springs B404 is located between the mounting frame 401 and the reset plate 403;

[0049] Its specific functions are as follows: the movable connecting frame 402 is slidably mounted on the mounting frame 401 and the rectangular frame 101, and the inner end of the movable connecting frame 402 is provided with a chamfer, and the inner end of the movable connecting frame 402 is inserted into the support base 301, which limits the support base 301 and facilitates the staff to connect the support base 301 with the rectangular frame 101; the arrangement of a row of coil springs B404 ensures that the movable connecting frame 402 can move only when a force is applied, thereby ensuring the connection effect between the support base 301 and the rectangular frame 101;

[0050] In addition, when the building materials are of a rectangular structure and it is convenient for the staff to arrange the building materials in order, after the lifting is completed, the staff can pull the two movable connecting frames 402 outward to separate the support base 301 from the rectangular frame 101, which is convenient for the rapid unloading of the building materials; at the same time, when the building materials are lifted, the staff can pre-arrange the building materials on another set of support mechanisms 300, which saves the time for placing and removing the building materials and improves the lifting efficiency of the building materials.

[0051] Working principle: The staff properly adjusts the position of the adjustable lifting seat 105 to change the center of gravity of the building materials during lifting, which is conducive to improving the stability during lifting; the setting of the circular magnet 107 limits the positioning pin 106 to prevent the positioning pin 106 from falling off; then the adjustable lifting seat 105 is connected to the hook on the lifting equipment. When the hook on the lifting equipment drives the adjustable lifting seat 105 to move upward, the rectangular frame 101 first remains stationary, so that the top of the movable blocking cover 102 is higher than The top of the rectangular frame 101 ensures that there must be a certain distance between the building materials and the top of the movable blocking cover 102, thereby reducing the occurrence of building materials falling; when the bottoms of the two rows of rectangular limit blocks 103 contact the movable blocking cover 102, the rectangular frame 101 and the movable blocking cover 102 move upward at the same time; when the bottoms of the two rows of rectangular limit blocks 103 contact the movable blocking cover 102, the movable protective frame 202 is in a horizontal state, which blocks the building materials and prevents them from falling during lifting;

[0052] When the tops of the two rows of rectangular limit blocks 103 are in contact with the movable blocking cover 102, the movable protective frame 202 is in a vertical state, making it convenient for workers to place and take out building materials in the rectangular frame 101;

[0053] Rainwater on the building materials can flow downward through a row of slots, which has a centralized collection effect on the rainwater on the building materials;

[0054] When it is necessary to clean the collected rainwater, the staff presses down one or more circular guide rods 303. At this time, the movable sealing plate 304 moves downward, creating a gap between the movable sealing plate 304 and the support base 301. The collected rainwater can be discharged through the gap, preventing rainwater from dripping on the building materials during lifting. This facilitates the staff to determine the center of gravity of the building materials during lifting. When the lifting mechanism 100 is slightly tilted to the left under the action of the two arc-shaped protrusions 3011, it means that the center of gravity of the building materials is to the left of the center.

[0055] When the lifting mechanism 100 tilts slightly to the right under the action of the two arc-shaped protrusions 3011, it means that the center of gravity of the building material is located to the right of the center. At this time, the staff presses the lifting mechanism 100 to tilt the lifting mechanism 100 to the other side. The staff judges the approximate position of the center of gravity of the building material based on the pressing force. When the pressing force is large, the position of the adjustable lifting seat 105 can be adjusted more; when the pressing force is moderate, the position of the adjustable lifting seat 105 can be slightly adjusted; when the pressing force is small, the position of the adjustable lifting seat 105 can be left unchanged, thereby achieving pre-adjustment of the lifting position and improving the lifting efficiency of the building material.

[0056] When the building materials have a rectangular structure and it is convenient for the staff to arrange the building materials in order, after the lifting is completed, the staff can pull the two movable connecting frames 402 outward to separate the support base 301 from the rectangular frame 101, so as to facilitate the rapid unloading of the building materials; at the same time, when the building materials are lifted, the staff can pre-arrange the building materials on another set of support mechanisms 300, which saves the time of placing and removing the building materials and improves the lifting efficiency of the building materials.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A lifting device for construction, comprising a lifting mechanism (100); characterized in that: A protective mechanism (200) is installed on the lifting mechanism (100), and the protective mechanism (200) is used to prevent building materials in the lifting mechanism (100) from falling; a supporting mechanism (300) is installed at the bottom of the lifting mechanism (100); connecting mechanisms (400) are respectively installed on the front and rear sides of the lifting mechanism (100), and two sets of the connecting mechanisms (400) are used to connect the lifting mechanism (100) and the supporting mechanism (300); The lifting mechanism (100) comprises: a rectangular frame (101), a movable blocking cover (102) and a rectangular limiting block (103); the movable blocking cover (102) is slidably mounted on the outside of the rectangular frame (101), and the top of the rectangular frame (101) is flush with the top of the movable blocking cover (102); the rectangular limiting blocks (103) are provided in two rows, and the two rows of rectangular limiting blocks (103) are fixedly mounted on the front and rear sides of the rectangular frame (101), and the two rows of rectangular limiting blocks (103) are also slidably connected to the movable blocking cover (102); The protection mechanism (200) comprises: a rectangular mounting block (201) and a movable protection frame (202); two rectangular mounting blocks (201) are provided, and the two rectangular mounting blocks (201) are fixedly mounted on the top of the movable blocking cover (102); the movable protection frame (202) is rotatably mounted on the two rectangular mounting blocks (201); The protection mechanism (200) further comprises: a driving rack (203) and a driving gear (204); two driving racks (203) are provided, and the two driving racks (203) are fixedly mounted on the top of the rectangular frame (101); two driving gears (204) are provided, and the two driving gears (204) are fixedly mounted on the movable protection frame (202), and the two driving gears (204) are meshedly connected with the two driving racks (203); The support mechanism (300) comprises: a support base (301) and a rectangular mounting plate (302); the support base (301) is slidably mounted on the bottom of the rectangular frame (101), and two arc-shaped protrusions (3011) are provided at the center of the bottom of the support base (301); the rectangular mounting plate (302) is fixedly mounted on the support base (301); The support mechanism (300) further comprises: circular guide rods (303), a movable sealing plate (304) and a coil spring A (305); the circular guide rods (303) are provided in a row, and the row of circular guide rods (303) are slidably mounted on the rectangular mounting plate (302); the movable sealing plate (304) is fixedly mounted on the row of circular guide rods (303), and the outer wall of the movable sealing plate (304) is in contact with the support base (301); the coil springs A (305) are provided in a row, and the row of coil springs A (305) are sleeved outside the row of circular guide rods (303), and the row of coil springs A (305) are located between the rectangular mounting plate (302) and the movable sealing plate (304); The connecting mechanism (400) comprises: a mounting frame (401) and a movable connecting frame (402); the mounting frame (401) is fixedly mounted on the outer wall of the rectangular frame (101); the movable connecting frame (402) is slidably mounted on the mounting frame (401) and the rectangular frame (101), and the inner end of the movable connecting frame (402) is provided with a chamfer, and the inner end of the movable connecting frame (402) is inserted into the supporting base (301); The connecting mechanism (400) further comprises: a reset plate (403) and a coil spring B (404); the reset plate (403) is fixedly mounted on the movable connecting frame (402), and the inner side of the reset plate (403) contacts the rectangular frame (101); the coil springs B (404) are provided in a row, and the row of coil springs B (404) is sleeved on the outside of the movable connecting frame (402), and the row of coil springs B (404) is located between the mounting frame (401) and the reset plate (403).

2. A lifting device for construction according to claim 1, characterized in that: The lifting mechanism (100) further comprises: a lifting bracket (104) and an adjustable lifting seat (105); the lifting bracket (104) is fixedly mounted on the top of the movable blocking cover (102); and the adjustable lifting seat (105) is slidably mounted on the lifting bracket (104).

3. A lifting device for construction according to claim 2, characterized in that: The lifting mechanism (100) further comprises: a positioning pin (106) and a circular magnet (107); the positioning pin (106) is inserted into the interior of the lifting bracket (104) and the adjustable lifting seat (105); the circular magnet (107) is fixedly mounted on the positioning pin (106), and the inner side of the circular magnet (107) is in contact with the lifting bracket (104).

4. A lifting device for construction according to claim 1, characterized in that: When the tops of the two rows of rectangular limit blocks (103) contact the movable blocking cover (102), the movable protection frame (202) is in a vertical state; when the bottoms of the two rows of rectangular limit blocks (103) contact the movable blocking cover (102), the movable protection frame (202) is in a horizontal state.

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