A detachable safety net for construction projects

Abstract

The present invention belongs to the field of construction technology, and discloses a detachable building engineering protection net, which includes a first protection net and a second protection net. One side of the first protection net is fixedly installed with a rectangular frame, and one side of the second protection net is fixedly installed with a convex-shaped frame. Two symmetrically distributed first extension plates are integrally fixed on one side of the rectangular frame, and two symmetrically distributed second extension plates are integrally fixed on the surface of the rectangular frame. Equally spaced rectangular card slots, as well as strip-shaped sliding grooves communicating with the rectangular card slots, are formed on the two first extension plates and the two second extension plates. One end of the strip-shaped sliding groove away from the rectangular card slot is an open structure. Oblique surface blocks are arranged on two opposite sides of the convex-shaped frame. The two oblique surface blocks are symmetrically distributed, and the oblique surface blocks are adapted to the rectangular card slots. An installation groove is formed in the convex-shaped frame, and a lifting mechanism for driving the two oblique surface blocks to move up and down, and a locking component for driving the two oblique surface blocks to move horizontally are arranged in the installation groove.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction tools, and specifically relates to a detachable building engineering protection net. Background Art

[0002] Construction engineering refers to the engineering entity formed by the construction of various housing buildings and their ancillary facilities and the installation of pipelines and equipment supporting them. Among them, "housing building" refers to a project with a roof, beams, columns, walls, foundation, and capable of forming an internal space to meet the needs of people's production, residence, study, and public activities.

[0003] The protection net is a net set under or on the side of a building during construction to play a protective role to prevent accidents caused by the fall of people or objects.

[0004] Currently, the existing protection nets are rather complicated during the installation and disassembly processes. External tools are often required for their disassembly or installation. For example, some protection nets are screwed together with bolts, and external tools are needed to unscrew the bolts. Or some two protection nets are directly welded together, making subsequent disassembly difficult. Summary of the Invention

[0005] To solve the problem of complexity during the installation and disassembly processes proposed in the above background art, the present invention provides a detachable building engineering protection net.

[0006] To achieve the above object, the present invention provides the following technical solution: A detachable building engineering protection net, including a first protection net and a second protection net. A rectangular frame is fixedly installed on one side of the first protection net close to the second protection net. A convex-shaped frame is fixedly installed on one side of the second protection net close to the first protection net. Two symmetrically distributed first extension plates are integrally fixed on the side of the rectangular frame away from the first protection net. Two symmetrically distributed second extension plates are integrally fixed on the surface of the rectangular frame. Equally spaced rectangular card slots and strip-shaped sliding grooves communicating with the rectangular card slots are provided on both of the two first extension plates and the two second extension plates. One end of the strip-shaped sliding groove away from the rectangular card slot is of an open structure. Inclined surface blocks are provided on two opposite sides of the convex-shaped frame. The two inclined surface blocks are symmetrically distributed and are adapted to the rectangular card slots. An installation groove is provided in the convex-shaped frame. A lifting mechanism for driving the two inclined surface blocks to move up and down and a locking component for driving the two inclined surface blocks to move horizontally are provided in the installation groove.

[0007] Preferably, the groove between the two first extension plates is adapted to the convex-shaped frame, and the groove formed between the two second extension plates is adapted to the convex-shaped frame. The lifting mechanism includes two vertical plates symmetrically distributed and fixedly connected to the bottom surface of the inner wall of the installation groove. An internal spline shaft rotatably connected to the two vertical plates penetrates through the two vertical plates. An external spline shaft adapted to the internal spline shaft penetrates through the internal spline shaft. One end of the external spline shaft extends to the outside of the installation groove and is fixedly provided with a handle.

[0008] Preferably, a support plate is fixedly connected between the opposite inner walls of the installation groove. A threaded rod is rotatably connected between the lower surface of the support plate and the top surface of the inner wall of the installation groove. A first bevel gear coaxially fixed to the threaded rod is rotatably connected to the lower surface of the support plate. A second bevel gear fixedly connected to the internal spline shaft is sleeved on the internal spline shaft. The second bevel gear meshes with the first bevel gear.

[0009] Preferably, an internally threaded sleeve threadedly connected to the threaded rod is sleeved on the threaded rod. Rectangular frames are fixedly connected to both sides of the internally threaded sleeve away from each other. A limiting chute communicating with the outside and used for the up-and-down movement of the rectangular frame is provided on the side wall of the installation groove. Plug rods are telescopically inserted into the two rectangular frames. Two inclined surface blocks are respectively fixed to one ends of the two plug rods located outside the rectangular frames. The plug rods are slidably adapted to the strip-shaped chute. U-shaped grooves adapted to the external spline shaft are provided on both the first extension plate and the second extension plate.

[0010] Preferably, the lock assembly includes a partition fixed in the rectangular frame. A sleeve is telescopically inserted into the partition. A first annular plate and a second annular plate are integrally fixed to both ends of the sleeve respectively. A first spring sleeved on the sleeve is fixedly connected between the second annular plate and the partition.

[0011] Preferably, the plug rod passes through the sleeve and is telescopically connected to the sleeve. A frustum-shaped clamping block fixedly connected to the plug rod is sleeved on the surface of the plug rod. A second spring sleeved on the plug rod is fixedly connected between the frustum-shaped clamping block and the first annular plate. A clamping rod is telescopically movable through the bottom wall of the rectangular frame.

[0012] Preferably, a circular plate is sleeved on the clamping rod. A third spring sleeved on the clamping rod is fixedly connected between the circular plate and the rectangular frame. A push rod is fixedly connected to the edge of the second annular plate. The push rod extends downward to the outside of the rectangular frame and then bends into an L shape. A strip-shaped groove for the horizontal sliding of the push rod is provided on the rectangular frame. An inclined surface groove is provided at the lower end of the clamping rod. One end of the push rod located outside the rectangular frame is aligned with the inclined surface groove.

[0013] Preferably, two symmetrically distributed cross bars are vertically fixed to the push rod. A frame is slidably connected to the top surface of the inner wall of the installation groove. A bent rod is fixedly connected to the frame. One end of the bent rod is rotatably connected to the free end of the external spline shaft.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] When the first protective net and the second protective net need to be installed at an uneven location, the lower edges of the first protective net and the second protective net can be abutted against the ground, and the two inclined surface cards are driven to move in the vertical direction through the lifting mechanism, so that the two inclined surface blocks can move to positions adapted to the rectangular card slots, effectively improving the overall applicability of the device;

[0016] By arranging the buckle assembly, after the two inclined surface blocks enter the two first extension plates or enter the two second extension plates, they can be directly clamped into the rectangular card slots to complete the installation of the first protective net and the second protective net;

[0017] And when it is necessary to disassemble the first protective net and the second protective net, the inclined surface blocks can be directly driven to move horizontally out of the rectangular card slots, so that the locking state between the rectangular frame and the convex-shaped frame is unlocked, and the convex-shaped frame can directly disengage from the rectangular frame without using external tools to disassemble and assemble between the first protective net and the second protective net;

[0018] The lifting and unlocking of the inclined surface blocks are controlled by the same driving shaft, effectively improving the convenience of disassembling and installing the first protective net and the second protective net. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the present invention;

[0020] Figure 2 It is for the present invention Figure 1 The enlarged structural diagram at D in;

[0021] Figure 3 It is a schematic structural diagram of the state where the convex-shaped frame of the present invention enters the two second extension plates;

[0022] Figure 4 It is for the present invention Figure 3 The enlarged structural diagram at C in;

[0023] Figure 5 It is a schematic internal structure diagram of the installation groove in the present invention;

[0024] Figure 6 It is for the present invention Figure 5 The enlarged structural diagram at A in;

[0025] Figure 7 It is for the present invention Figure 3 The enlarged structural diagram at B in;

[0026] Figure 8 It is a schematic structural diagram of the sleeve in the present invention;

[0027] Figure 9 Schematic diagram of the internal structure of the rectangular frame in the present invention;

[0028] Figure 10 Schematic diagram of the structure of the inclined groove in the present invention;

[0029] Figure 11 Schematic diagram of the structure at the position of the frame in the present invention;

[0030] Figure 12 In the present invention Figure 11 Enlarged schematic diagram of the structure at position E;

[0031] Figure 13 Schematic diagram of the state structure when the convex-shaped frame is about to enter into one of the two extension plates in the present invention.

[0032] In the figure: 11, the first protective net; 12, the second protective net; 13, the rectangular frame; 14, the convex-shaped frame; 15, the first extension plate; 16, the second extension plate; 21, the rectangular card slot; 22, the strip-shaped sliding groove; 3, the inclined block; 5, the installation groove; 61, the vertical plate; 62, the internal spline shaft; 63, the external spline shaft; 64, the threaded rod; 65, the first bevel gear; 66, the second bevel gear; 67, the support plate; 68, the internal thread sleeve; 69, the rectangular frame; 610, the limit sliding groove; 611, the inserting rod; 612, the U-shaped groove; 71, the partition plate; 72, the sleeve; 73, the first annular plate; 74, the second annular plate; 75, the first spring; 76, the frustum-shaped block; 77, the second spring; 78, the clamping rod; 79, the circular plate; 710, the third spring; 711, the push rod; 712, the strip-shaped groove; 713, the inclined groove; 714, the cross bar; 715, the frame; 716, the bent rod. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] As Figures 1 to 3As shown in the figure, the present invention provides a detachable construction engineering protection net, which includes a first protection net 11 and a second protection net 12. A rectangular frame 13 is fixedly installed on one side of the first protection net 11 close to the second protection net 12. A convex-shaped frame 14 is fixedly installed on one side of the second protection net 12 close to the first protection net 11. Two symmetrically distributed first extension plates 15 are integrally fixed on the side of the rectangular frame 13 away from the first protection net 11. The groove between the two first extension plates 15 is adapted to the convex-shaped frame 14. Two symmetrically distributed second extension plates 16 are integrally fixed on the surface of the rectangular frame 13. The groove formed between the two second extension plates 16 is adapted to the convex-shaped frame 14.

[0035] Among them, the protruding part of the convex-shaped frame 14 can enter between the two first extension plates 15 and can also enter between the two second extension plates 16.

[0036] As Figure 3 and Figure 4 shown, rectangular card slots 21 are equidistantly distributed on both the two first extension plates 15 and the two second extension plates 16, and strip-shaped sliding grooves 22 communicated with the rectangular card slots 21 are provided. One end of the strip-shaped sliding groove 22 away from the rectangular card slot 21 is of an open structure.

[0037] Among them, the strip-shaped sliding groove 22 and the rectangular card slot 21 form a T-shaped groove body.

[0038] As Figure 4 and Figure 5 shown, inclined plane blocks 3 are provided on two opposite sides of the convex-shaped frame 14. The two inclined plane blocks 3 are symmetrically distributed, and the inclined plane blocks 3 are adapted to the rectangular card slots 21. An installation groove 5 is opened in the convex-shaped frame 14. A lifting mechanism for driving the two inclined plane blocks 3 to move up and down and a locking component for driving the two inclined plane blocks 3 to move horizontally are arranged in the installation groove 5.

[0039] Among them, the two inclined plane blocks 3 are located on both sides of the protruding part of the convex-shaped frame 14.

[0040] When the first protection net 11 and the second protection net 12 need to be installed at an uneven position, the lower edges of the first protection net 11 and the second protection net 12 can be abutted against the ground. The lifting mechanism is used to drive the two inclined plane blocks 3 to move along the vertical direction, so that the two inclined plane blocks 3 can move to a position adapted to the rectangular card slots 21, effectively improving the overall applicability of the device;

[0041] By setting the locking component, after the two inclined plane blocks 3 enter the two first extension plates 15 or enter the two second extension plates 16, they can be directly snapped into the rectangular card slots 21 to complete the installation of the first protection net 11 and the second protection net 12;

[0042] And when it is necessary to disassemble the first protective net 11 and the second protective net 12, the inclined surface clamping block 3 can be directly driven to move horizontally out of the rectangular card slot 21, so that the locking state between the rectangular frame 13 and the convex-shaped frame 14 is unlocked, and the convex-shaped frame 14 can directly disengage from the rectangular frame 13, without the need to use external tools for disassembling and assembling between the first protective net 11 and the second protective net 12;

[0043] Moreover, the lifting and unlocking of the inclined surface clamping block 3 are controlled by the same drive shaft, effectively improving the convenience of disassembling and installing the first protective net 11 and the second protective net 12.

[0044] As Figure 5 and Figure 6 shown, the lifting mechanism includes two vertical plates 61 vertically fixed on the bottom surface of the inner wall of the installation groove 5 and symmetrically distributed. The two vertical plates 61 are penetrated by an internal spline shaft 62 rotatably connected thereto. The internal spline shaft 62 is penetrated by an external spline shaft 63 adapted thereto. One end of the external spline shaft 63 extends to the outside of the installation groove 5 and is fixedly installed with a handle.

[0045] Among them, the external spline shaft 63 can move horizontally without affecting the internal spline shaft 62, and can also drive the internal spline shaft 62 to rotate accordingly.

[0046] As Figure 5 and Figure 6 shown, a support plate 67 is fixedly connected between the opposite inner walls of the installation groove 5. A threaded rod 64 is rotatably connected between the support plate 67 and the top surface of the inner wall of the installation groove 5. A first bevel gear 65 coaxially fixed with the threaded rod 64 is rotatably connected to the lower surface of the support plate 67. A second bevel gear 66 fixedly connected thereto is sleeved on the internal spline shaft 62. The second bevel gear 66 meshes with the first bevel gear 65.

[0047] As Figure 5 、 Figure 7 and Figure 9 shown, an internal thread sleeve 68 threadedly connected to the threaded rod 64 is sleeved on the threaded rod 64. Rectangular frames 69 are fixedly connected to both sides of the internal thread sleeve 68 away from each other. A limiting chute 610 for the rectangular frames 69 to move up and down and communicating with the outside is provided on the side wall of the installation groove 5. Plug rods 611 are telescopically inserted into the two rectangular frames 69. Two inclined surface clamping blocks 3 are respectively fixed to one ends of the two plug rods 611 located outside the rectangular frames 69. The plug rods 611 are slidably adapted to the strip-shaped chute 22.

[0048] By providing the limiting chute 610, it is possible to limit the two rectangular frames 69 and the internal thread sleeve 68 to only move vertically and prevent them from rotating with the threaded rod 64.

[0049] As Figure 4As shown, U-shaped grooves 612 adapted to the external spline shaft 63 are provided on both the first extension plate 15 and the second extension plate 16.

[0050] As Figure 8 and Figure 9 shown, the latch assembly includes a partition plate 71 fixed within the rectangular frame 69. A sleeve 72 is telescopically inserted into the partition plate 71. An annular plate one 73 and an annular plate two 74 are integrally fixed to both ends of the sleeve 72 respectively. A first spring 75 sleeved on the sleeve 72 is fixedly connected between the annular plate two 74 and the partition plate 71.

[0051] In the initial state, the first spring 75 can exert a thrust on the annular plate two 74, so that the annular plate one 73 abuts against the surface of the partition plate 71.

[0052] As Figure 9 shown, the insertion rod 611 passes through the sleeve 72 and is telescopically connected to the sleeve 72. A frustum-shaped clamping block 76 fixed to the insertion rod 611 is sleeved on the surface of the insertion rod 611. A second spring 77 sleeved on the insertion rod 611 is fixedly connected between the frustum-shaped clamping block 76 and the annular plate one 73. A clamping rod 78 that telescopically moves is penetrated through the bottom wall of the rectangular frame 69.

[0053] Among them, the frustum-shaped clamping block 76 abuts against the clamping rod 78, and the clamping rod 78 can restrict the frustum-shaped clamping block 76 and the insertion rod 611, making them unable to move towards the inclined surface clamping block 3 side.

[0054] As Figure 9 and Figure 10 shown, a circular plate 79 is sleeved on the clamping rod 78. A third spring 710 sleeved on the clamping rod 78 is fixedly connected between the circular plate 79 and the rectangular frame 69. A push rod 711 is fixedly connected to the edge of the annular plate two 74. The push rod 711 extends downward to the outside of the rectangular frame 69 and then bends into an L shape. A strip-shaped groove 712 for the horizontal sliding of the push rod 711 is provided on the rectangular frame 69. An inclined surface groove 713 is provided at the lower end of the clamping rod 78. One end of the push rod 711 located outside the rectangular frame 69 is aligned with the inclined surface groove 713.

[0055] Among them, when the push rod 711 moves towards the clamping rod 78 side, its end can enter the inclined surface groove 713 and abut against the inclined surface of the inclined surface groove 713, pushing the clamping rod 78 downward, so that the clamping rod 78 can disengage from the frustum-shaped clamping block 76, unlocking the locked state of the insertion rod 611 and the frustum-shaped clamping block 76.

[0056] As Figure 11 and Figure 12 shown, two symmetrically distributed cross bars 714 are perpendicularly fixed to the push rod 711. A frame 715 is slidably connected to the top surface of the inner wall of the installation groove 5. A bent rod 716 is fixedly connected to the frame 715. One end of the bent rod 716 is rotatably connected to the free end of the external spline shaft 63.

[0057] Specifically, the frame 715 is integrally composed of three rectangular frames. Two of the rectangular frames are slidably connected to the top surface of the inner wall of the installation groove 5, and the frame 715 is located between the four cross bars 714.

[0058] The working principle and usage process of the present invention are as follows:

[0059] When it is necessary to install the first protective net 11 and the second protective net 12, align the convex-shaped frame 14 with the two first extension plates 15, or align it with the two second extension plates 16;

[0060] When the convex-shaped frame 14 enters the two first extension plates 15, the first protective net 11 and the second protective net 12 will be installed in a flat state. When the convex-shaped frame 14 enters the two second extension plates 16, the first protective net 11 and the second protective net 12 will be installed vertically, which can be determined according to the construction requirements;

[0061] When the convex-shaped frame 14 enters between the two first extension plates 15, the inclined surfaces of the two inclined surface blocks 3 on the outer side of the convex-shaped frame 14 will first abut against the edges of the first extension plates 15, as Figure 13 shown. As the convex-shaped frame 14 moves towards the side close to the first extension plate 15, the inclined surface blocks 3 are restricted and move towards the side close to the rectangular frame 69, so that the two inclined surface blocks 3 can follow the convex-shaped frame 14 into the two first extension plates 15;

[0062] When the inclined surface block 3 moves into the rectangular frame 69, it can drive the insertion rod 611 to move accordingly. The insertion rod 611 can drive the frustum-shaped block 76 sleeved on its surface to move away from the clamping rod 78, causing the second spring 77 to be compressed;

[0063] When the inclined surface block 3 moves to the strip-shaped sliding groove 22, it will lose the restriction. The second spring 77 drives the frustum-shaped block 76, the insertion rod 611, and the inclined surface block 3 to move away from the rectangular frame 69 to return to the original position by the resilience force, so that the inclined surface block 3 enters the rectangular clamping groove 21 to be clamped, thereby installing the first protective net 11 and the second protective net 12 together;

[0064] Before installing the first protective net 11 and the second protective net 12, if the terrain is not flat enough, the position of the inclined surface block 3 can be adjusted by rotating the external spline shaft 63. Manually rotate the external spline shaft 63, and the external spline shaft 63 can drive the internal spline shaft 62 sleeved on its surface to rotate accordingly. The internal spline shaft 62 can drive the second bevel gear 66 to rotate accordingly. The second bevel gear 66 can drive the first bevel gear 65 meshed with it to rotate accordingly. The first bevel gear 65 can drive the threaded rod 64 fixed coaxially with it to rotate. The threaded rod 64 can drive the internal thread sleeve 68 to move along the vertical direction. The internal thread sleeve 68 can drive the inclined surface block 3 to move along the vertical direction to a preset position through the inserting rod 611, so as to ensure that the inclined surface block 3 can be inserted into one of the rectangular slots 21 even when the terrain is uneven, and complete the installation of the first protective net 11 and the second protective net 12;

[0065] When it is necessary to remove the first protective net 11 and the second protective net 12, manually push and pull the external spline shaft 63, so that the external spline shaft 63 drives the frame 715 to move along the horizontal direction through the bending rod 716, so that the frame 715 can push the cross bar 714 to move towards the inclined surface block 3. The cross bar 714 can drive the second annular plate 74 to move accordingly through the push rod 711, so that the first spring 75 is compressed. At the same time, the end of the push rod 711 can enter the inclined surface groove 713 and abut against the inclined surface of the inclined surface groove 713, pushing the clamping rod 78 to move downward, so that the clamping rod 78 can disengage from the frustum-shaped clamping block 76, unlocking the locked state of the inserting rod 611 and the frustum-shaped clamping block 76. At this time, the second spring 77 can push the frustum-shaped clamping block 76 and the inserting rod 611 to move outside the rectangular frame 69. The inserting rod 611 can drive the inclined surface block 3 to move outside the rectangular slot 21, so that the inclined surface block 3 disengages from the rectangular slot 21;

[0066] Since the inserting rod 611 is slidably adapted to the strip-shaped chute 22, the convex-shaped frame 14 can directly come out between the two first extension plates 15;

[0067] After the disassembly work is completed, the inclined surface block 3 can be manually pushed into the rectangular frame 69. The rectangular frame 69 can drive the frustum-shaped clamping block 76 to move accordingly, so that the inclined surface of the frustum-shaped clamping block 76 can push the clamping rod 78 to move downward. When the rectangular frame 69 moves to the other side of the clamping rod 78, the third spring 710 can push the clamping rod 78 to move upward, so that the frustum-shaped clamping block 76 is clamped by the clamping rod 78 again for the next installation and use.

[0068] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0069] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detachable construction engineering protection net, comprising a first protection net (11) and a second protection net (12), characterized in that: On one side of the first protective net (11), a rectangular frame (13) is fixedly installed. On one side of the second protective net (12), a convex-shaped frame (14) is fixedly installed. On one side of the rectangular frame (13), two symmetrically distributed first extension plates (15) are integrally fixed. On the surface of the rectangular frame (13), two symmetrically distributed second extension plates (16) are integrally fixed. Equally spaced rectangular card slots (21) and strip-shaped sliding grooves (22) communicating with the rectangular card slots (21) are formed on the two first extension plates (15) and the two second extension plates (16). The end of the strip-shaped sliding groove (22) far from the rectangular card slot (21) is of an open structure. On the opposite sides of the convex-shaped frame (14), inclined surface blocks (3) are arranged. The two inclined surface blocks (3) are symmetrically distributed and the inclined surface blocks (3) are adapted to the rectangular card slots (21). An installation groove (5) is formed in the convex-shaped frame (14). An elevating mechanism for driving the two inclined surface blocks (3) to move up and down and a locking component for driving the two inclined surface blocks (3) to move horizontally are arranged in the installation groove (5). The groove between the two first extension plates (15) is adapted to the convex-shaped frame (14). The groove formed between the two second extension plates (16) is adapted to the convex-shaped frame (14). The elevating mechanism includes two vertically fixed and symmetrically distributed vertical plates (61) on the bottom surface of the inner wall of the installation groove (5). An internal spline shaft (62) rotatably connected to the two vertical plates (61) penetrates through the two vertical plates (61). An external spline shaft (63) adapted to the internal spline shaft (62) penetrates through the internal spline shaft (62). One end of the external spline shaft (63) extends to the outside of the installation groove (5) and is fixedly installed with a handle.

2. The detachable construction engineering protection net according to claim 1, characterized in that: A support plate (67) is fixedly connected between the opposite inner walls of the installation groove (5). A threaded rod (64) is rotatably connected between the support plate (67) and the top surface of the inner wall of the installation groove (5). A first bevel gear (65) coaxially fixed to the threaded rod (64) is rotatably connected to the lower surface of the support plate (67). A second bevel gear (66) fixedly connected to the internal spline shaft (62) is sleeved on the internal spline shaft (62). The second bevel gear (66) meshes with the first bevel gear (65).

3. The detachable construction engineering protection net according to claim 2, characterized in that: An internal threaded sleeve (68) threadedly connected to the threaded rod (64) is sleeved on the threaded rod (64). Rectangular frames (69) are fixedly connected to the two mutually remote sides of the internal threaded sleeve (68). A limiting sliding groove (610) communicating with the outside and used for the up and down movement of the rectangular frames (69) is formed on the side wall of the installation groove (5). Plug rods (611) are telescopically inserted into the two rectangular frames (69). The two inclined surface blocks (3) are respectively fixed to one ends of the two plug rods (611) located outside the rectangular frames (69). The plug rods (611) are slidably adapted to the strip-shaped sliding grooves (22). U-shaped grooves (612) adapted to the external spline shaft (63) are formed on both the first extension plate (15) and the second extension plate (16).

4. The detachable construction engineering protection net according to claim 3, characterized in that: The latch assembly includes a partition plate (71) fixed within a rectangular frame (69). A sleeve (72) is telescopically inserted into the partition plate (71). An annular plate one (73) and an annular plate two (74) are integrally fixed to two ends of the sleeve (72) respectively. A first spring (75) sleeved on the sleeve (72) is fixedly connected between the annular plate two (74) and the partition plate (71).

5. The detachable construction engineering protection net according to claim 4, characterized in that: The insertion rod (611) passes through the sleeve (72) and is telescopically connected to the sleeve (72). A frustum-shaped clamping block (76) fixed to the insertion rod (611) is sleeved on the surface of the insertion rod (611). A second spring (77) sleeved on the insertion rod (611) is fixedly connected between the frustum-shaped clamping block (76) and the annular plate one (73). A clamping rod (78) with telescopic movement penetrates through the bottom wall of the rectangular frame (69).

6. The detachable construction engineering protection net according to claim 5, characterized in that: A circular plate (79) is sleeved on the clamping rod (78). A third spring (710) sleeved on the clamping rod (78) is fixedly connected between the circular plate (79) and the rectangular frame (69). A push rod (711) is fixedly connected to the edge of the annular plate two (74). The push rod (711) extends downward to the outside of the rectangular frame (69) and then bends into an L shape. A strip-shaped groove (712) for the horizontal sliding of the push rod (711) is formed in the rectangular frame (69). An inclined surface groove (713) is formed at the lower end of the clamping rod (78). One end of the push rod (711) located outside the rectangular frame (69) is aligned with the inclined surface groove (713).

7. The detachable construction engineering protection net according to claim 6, characterized in that: Two symmetrically distributed cross bars (714) are perpendicularly fixed to the push rod (711). A frame (715) is slidably connected to the top surface of the inner wall of the installation groove (5). A bent rod (716) is fixedly connected to the frame (715). One end of the bent rod (716) is rotatably connected to the free end of the external spline shaft (63).

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