Boom construction height monitoring device

Abstract

The present invention belongs to the technical field of boom height monitoring, and discloses a boom construction height monitoring device, comprising a clamp, a mounting seat, a connecting frame, and a telescopic mechanism; the clamp is fastened to the outside of the bottom end of the boom by bolts, the clamp is connected to the mounting seat by bolts, and the mounting seat is located at the bottom end of the bottom end of the boom, the connecting frame is installed at the bottom of the mounting seat, and four groups of connecting rods are hinged around the bottom of the connecting frame, each group of connecting rods consists of two connecting rods, and the bottom of each group of connecting rods is hinged to a height monitoring assembly, and the inner side of each group of connecting rods is hinged to a connecting arm, and the other side of the connecting arm is hinged to a connecting seat, and the telescopic mechanism is arranged in the center of the bottom of the mounting seat. This design allows the height monitoring assembly to pass through the boom mounting hole of the arch rib together with the bottom end of the boom, without the need for construction workers to remove it from the boom, thus saving construction process.

Description

Technical Field

[0001] The invention belongs to the technical field of boom height monitoring, in particular to a boom construction height monitoring device. Background Art

[0002] At present, when the hanger is installed, it needs to be hoisted by a traction system. Before lowering the hanger, a height monitoring device needs to be installed at the bottom end of the hanger, so that when the hanger is lowered close to the arch rib, the height monitoring device can use acoustic ranging to remind construction workers of the distance between the hanger and the arch rib, and facilitate construction workers to adjust the position of the hanger. After the hanger passes through the installation hole of the arch rib hanger, it continues to be lowered and the height monitoring device continues to monitor the distance between the bottom end of the hanger and the bridge deck, so that the bottom end of the hanger can be passed through the bridge deck to continue construction.

[0003] However, the acoustic wave probe of the height monitoring device can only be located outside the mounting hole of the arch rib hanger in order to detect the distance between the bottom end of the hanger and the arch rib downwards. When the bottom end of the hanger is lowered to the arch rib, the acoustic wave probe of the height monitoring device cannot pass through the mounting hole of the arch rib hanger together with the hanger due to position limitations. Usually, at this time, the construction workers will remove the height monitoring device from the bottom end of the hanger before continuing to lower it through the arch rib. After the bottom end of the hanger passes through the arch rib, the height monitoring device will be installed at the bottom end of the hanger for subsequent monitoring of the distance to the bridge deck. This operation method will delay the construction of the hanger for a long time, thereby delaying the construction progress of the hanger installation. Therefore, a height monitoring device for hanger construction is proposed. Summary of the Invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a device for monitoring the construction height of a boom.

[0005] To achieve the above object, the present invention provides the following technical solutions: a boom construction height monitoring device, comprising a clamp, a mounting seat, a connecting frame and a telescopic mechanism;

[0006] The hoop is fastened to the outer side of the bottom end of the boom by bolts, the hoop is connected to the mounting seat by bolts, and the mounting seat is located at the bottom end of the bottom end of the boom, the connecting frame is installed at the bottom of the mounting seat, and four groups of connecting rods arranged around the bottom of the connecting frame are hinged, each group of connecting rods consists of two connecting rods, and the bottom of each group of connecting rods is hinged with a height monitoring component, and the inner side of each group of connecting rods is hinged with a connecting arm, and the other side of the connecting arm is hinged with a connecting seat, and the telescopic mechanism is arranged in the center of the bottom of the mounting seat, and the telescopic mechanism is connected to the connecting seat;

[0007] The telescopic mechanism includes a round block, which is connected to the mounting seat, and the bottom of the round block is fixedly connected to a fixed cylinder, a piston rod is sleeved inside the fixed cylinder, the bottom end of the piston rod extends to the bottom of the fixed cylinder and is connected to the connecting seat, and a tension spring is sleeved outside the piston rod, one end of the tension spring is connected to the piston rod, and the other end of the tension spring is connected to the fixed cylinder, four vent holes are opened around the outside of the round block and are located below the piston rod, card slots are opened on both sides of the inside of the piston rod, a number of connecting holes arranged around the top of the outer side of the round block are opened, and a mesh plate is provided above the inside of the round block.

[0008] Preferably, a limiting rod 1 is fixedly connected to the lower part of both sides of the inner part of the round block, and the outer movable sleeve of the limiting rod 1 is provided with a moving block 1, and the top of the moving block 1 is connected with a clamping block 1, and the other end of the clamping block 1 extends to the inner part of the middle of the round block, and the outer sleeve of the limiting rod 1 is provided with a spring 1, one end of the spring 1 is connected to the moving block 1, and the other end of the spring 1 is connected to the round block.

[0009] Preferably, gears are movably installed on both sides of the inside of the round block, the outer side of the block one is connected to a rack one that can mesh with the gear, the top of the gear is meshed with a rack two, the outer side of the rack two is connected to a connecting rod, the other end of the connecting rod is connected to a connecting plate, the other side of the connecting plate is connected to a limiting rod two, the other end of the limiting rod two passes through the connecting frame and is connected to a ramp block located on the outside of the connecting frame.

[0010] Preferably, a determination structure is further included, which is arranged on the mounting seat. The determination structure includes two mounting blocks, which are respectively abutted on both sides of the top of the mounting seat. The top of the mounting block is connected to a fixed block, and the bottom of the mounting block is connected to a vertical rod. The bottom end of the vertical rod passes through the mounting seat and is connected to an extrusion block located below the connecting arm.

[0011] Preferably, limiting grooves are provided on the front and rear sides of the fixed block, a slider is slidably installed inside the limiting groove, the inner side of the slider is connected to a wheel frame, a roller is movably installed inside the wheel frame, one side of the slider is connected to a spring four, and the other end of the spring four is connected to the inner wall of the limiting groove.

[0012] Preferably, the bottom of the round block is connected to a fixed sleeve located outside the fixed cylinder, the outer movable sleeve of the round block is connected to a movable sleeve located inside the fixed sleeve, the top of the movable sleeve is connected to spring three, and the other end of the spring three is connected to the round block.

[0013] Preferably, the outer fixed sleeve of the round block is connected to a connecting ring located below the fixed sleeve, the bottom of the movable sleeve is connected to a fixing rod, the bottom end of the fixing rod passes through the connecting ring and is connected to a closing sleeve located below the connecting ring, the outer fixed sleeve of the fixed cylinder is connected to a fixing ring located below the vent hole, and the top of the fixing ring is connected to a rubber block.

[0014] Preferably, the outer side of the clamping block 1 is connected to a round rod located between the rack 1 and the limiting rod 1, the other end of the round rod passes through the round block and extends to the outside of the round block and is connected to a fixed plate, and a moving rod is connected to the lower inside of the fixed plate, and the other end of the moving rod extends to the inside of the fixed sleeve and is connected to the moving block 2.

[0015] Preferably, the inner movable sleeve of the moving block 2 is connected with the clamping block 2, the other side of the clamping block 2 is clamped inside the movable sleeve, the outer side of the clamping block 2 is connected with the spring 2, and the other end of the spring 2 is connected to the moving block 2.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention provides a card slot and a card block. When the construction worker adjusts the bottom end of the boom to align with the position of the arch rib boom mounting hole, he can push the connecting seat upward, so that the connecting seat drives the piston rod to move upward. Due to the movement of the connecting seat, the connecting arm can pull the connecting rod to deflect inward along the axis hinged to the connecting frame, and drive the height monitoring component to retract inward, so that the position of the height monitoring component is located directly below the connecting frame. When the piston rod rises, the gas inside the fixed cylinder can be discharged to the outside through the mesh plate and the connecting hole. At the same time, the tension spring is stretched. When the piston rod rises to a place of the card block, it can squeeze the card block, the moving block, the rack and the round rod to move outward along the limit rod. At this time, the spring is The cam is compressed and squeezed to both sides of the inside of the round block. As the piston rod continues to rise, until the slot reaches one of the blocks, the elastic recovery effect of the spring one can push the moving block one and the block one to move outward, and the block one is stuck into the inside of the slot, thereby fixing the piston rod. When the piston rod is fixed by the block one, the height monitoring component is just below the connecting frame. At this time, this position allows the boom to pass through the mounting hole of the arch rib boom together with the height monitoring device during the process below. This design allows the height monitoring component to pass through the boom mounting hole of the arch rib together with the bottom end of the boom, without the need for construction workers to remove it from the boom, saving the construction process.

[0018] 2. The present invention provides an inclined surface block and a judgment structure. When the bottom end of the boom and the height monitoring device pass through the boom mounting hole of the arch rib together, the edge of the roller boom mounting hole can be brought into contact with and blocked. As the boom continues to descend, the fixed block, the mounting block, the vertical rod and the extrusion block will move upward along the inside of the mounting seat. When the inclined surface block abuts the extrusion block, it can be determined that the height monitoring device and the bottom end of the boom have completely passed through the mounting hole. As the boom continues to descend, the extrusion block can squeeze the inclined surface block, the second limit rod, the connecting plate, the connecting rod and the second rack to move inward, and engage the gear to rotate, and then The gear meshing drives the rack 1, the block 1, the moving block 1 and the round rod to move outward along the limit rod 1. At this time, the spring 1 is compressed. When the block 1 is disengaged from the inside of the slot, the fixing effect of the piston rod is released. Due to the tension recovery effect of the tension spring, the piston rod and the connecting seat can be pulled downward, and the connecting arm can be used to push the connecting rod and the height monitoring component to expand and reset outward. After the height monitoring component is reset, the height monitoring component can be actively expanded after passing through the installation hole, and the distance measurement of the bridge deck can be continued, so there is no need for manual installation and then distance measurement, which further saves construction process and speeds up construction progress.

[0019] 3. The present invention provides a vent hole and a closing sleeve. When the clamping block 1 moves outward, the round rod drives the fixed plate, the movable rod and the movable block 2 to move outward, and causes the clamping block 2 to detach from the movable sleeve, thereby releasing the fixation of the movable sleeve. At this time, due to the elastic recovery effect of the spring 3, the movable sleeve, the fixed rod and the closing sleeve will be pushed downward along the connecting ring, and the closing sleeve will abut against the rubber block. At this time, the closing sleeve will close two-thirds of the vent hole, thereby reducing the cross-section of the vent hole and reducing the gas discharge efficiency. When the piston rod is reset by the elastic force, the inefficient exhaust through the vent hole can play a damping and buffering effect, thereby avoiding the vibration caused by the rapid reset of the piston rod and ensuring the stability of the height monitoring component. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a schematic cross-sectional view of the present invention;

[0022] Figure 3 for Figure 2 Schematic diagram of the local enlarged structure at A in the middle;

[0023] Figure 4 It is a schematic cross-sectional structural diagram of the telescopic mechanism of the present invention;

[0024] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at B in the middle;

[0025] Figure 6 for Figure 4 Schematic diagram of the local enlarged structure at C in the middle;

[0026] Figure 7 This is a schematic cross-sectional view of the mounting block of the present invention;

[0027] Figure 8 for Figure 7 Schematic diagram of the local enlarged structure at D in the middle;

[0028] Figure 9 It is a schematic cross-sectional structural diagram of the fixing block of the present invention;

[0029] Figure 10 for Figure 9 Schematic diagram of the local enlarged structure at E in the middle;

[0030] Figure 11 It is a schematic cross-sectional structural diagram of the connecting frame of the present invention;

[0031] Figure 12 for Figure 11 Schematic diagram of the local enlarged structure at F in the middle.

[0032] In the figure: 1. Clamp; 2. Mounting seat; 3. Connecting frame; 4. Connecting rod; 5. Height monitoring assembly; 6. Connecting arm; 7. Connecting seat; 8. Telescopic mechanism; 81. Round block; 82. Fixing cylinder; 83. Piston rod; 84. Tension spring; 85. Vent; 86. Slot; 87. Mesh plate; 88. Connecting hole; 89. Limiting rod 1; 810. Spring 1; 811. Moving block 1; 812. Fixing rod; 813. Block 1; 814. Rack 1; 815. Gear; 816. Rack 2; 817. Connecting rod; 818. Connecting plate; 8 19. Limit rod 2; 820. Inclined block; 821. Round rod; 822. Fixed plate; 823. Fixed sleeve; 824. Moving block 2; 825. Moving rod; 826. Spring 2; 827. Block 2; 828. Movable sleeve; 829. Spring 3; 830. Fixed ring; 831. Rubber block; 832. Closing sleeve; 833. Connecting ring; 9. Determination structure; 91. Mounting block; 92. Fixed block; 93. Vertical rod; 94. Extrusion block; 95. Limit slot; 96. Slider; 97. Spring 4; 98. Wheel frame; 99. Roller. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0034] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0035] In the description of this application, the term "for example" is used to mean "used as an example, illustration or explanation". Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is given to enable any person skilled in the art to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art will recognize that the present invention can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0036] like Figures 1 to 12 As shown, the present invention provides a monitoring device for boom construction height, comprising a clamp 1, a mounting base 2, a connecting frame 3 and a telescopic mechanism 8;

[0037] The hoop 1 is fastened to the outside of the bottom end of the boom by bolts, the hoop 1 is connected to the mounting seat 2 by bolts, and the mounting seat 2 is located at the bottom end of the boom, the connecting frame 3 is installed at the bottom of the mounting seat 2, and four groups of connecting rods 4 arranged around the bottom of the connecting frame 3 are hinged, each group of connecting rods 4 is composed of two connecting rods 4, and the bottom of each group of connecting rods 4 is hinged with a height monitoring component 5, and the inner side of each group of connecting rods 4 is hinged with a connecting arm 6, and the other side of the connecting arm 6 is hinged with a connecting seat 7. The telescopic mechanism 8 is arranged in the center of the bottom of the mounting seat 2, and the telescopic mechanism 8 is connected to the connecting seat 7;

[0038] The telescopic mechanism 8 includes a round block 81, which is connected to the mounting seat 2. The bottom of the round block 81 is fixedly connected to a fixed cylinder 82. A piston rod 83 is sleeved inside the fixed cylinder 82. The bottom end of the piston rod 83 extends to the bottom of the fixed cylinder 82 and is connected to the connecting seat 7. A tension spring 84 is sleeved outside the piston rod 83. One end of the tension spring 84 is connected to the piston rod 83, and the other end of the tension spring 84 is connected to the fixed cylinder 82. Four ventilation holes 85 located below the piston rod 83 are opened around the outside of the round block 81, and card grooves 86 are opened on both sides of the inside of the piston rod 83. A number of connecting holes 88 arranged around the top of the outer side of the round block 81 are opened, and a mesh plate 87 is provided above the inside of the round block 81.

[0039] Adopting the above scheme: while adjusting the bottom end of the boom to align with the position of the arch rib boom mounting hole, the construction personnel can push up the connecting seat 7, so that the connecting seat 7 drives the piston rod 83 to move upward. Due to the movement of the connecting seat 7, the connecting arm 6 can pull the connecting rod 4 to deflect inward along the axis hinged to the connecting frame 3, and drive the height monitoring component 5 to retract inward, so that the position of the height monitoring component 5 is located directly below the connecting frame 3. At this time, this position allows the boom to pass through the mounting hole of the arch rib boom together with the height monitoring device during the process below.

[0040] like Figure 4 and Figure 5 As shown, the lower parts of both sides of the inner part of the circular block 81 are fixedly connected with a limiting rod 89, the outer movable sleeve of the limiting rod 89 is provided with a moving block 811, the top of the moving block 811 is connected with a clamping block 813, the other end of the clamping block 813 extends to the inner part of the middle of the circular block 81, the outer sleeve of the limiting rod 89 is provided with a spring 810, one end of the spring 810 is connected to the moving block 811, and the other end of the spring 810 is connected to the circular block 81.

[0041] The above scheme is adopted: by setting a block 813, when the piston rod 83 rises to the block 813, the block 813, the moving block 811, the rack 814 and the round rod 821 can be squeezed to move outward along the limit rod 89. At this time, the spring 810 is compressed and squeezes the block 813 to both sides of the inside of the round block 81. As the piston rod 83 continues to rise, until the slot 86 reaches the block 813, due to the elastic recovery effect of the spring 810, the moving block 811 and the block 813 can be pushed to move outward, and the block 813 can be stuck into the inside of the slot 86, so that the piston rod 83 can be fixed.

[0042] like Figure 4 、 Figure 5 、 Figure 7 、 Figure 11 and Figure 12 As shown, gears 815 are movably installed on both sides of the inside of the round block 81, and the outer side of the block 1 813 is connected to a rack 1 814 that can engage with the gear 815. A rack 2 816 is engaged above the gear 815, and a connecting rod 817 is connected to the outer side of the rack 2 816. The other end of the connecting rod 817 is connected to a connecting plate 818, and the other side of the connecting plate 818 is connected to a limiting rod 2 819. The other end of the limiting rod 2 819 passes through the connecting frame 3 and is connected to a slope block 820 located on the outside of the connecting frame 3.

[0043] The above solution is adopted: by setting the inclined plane block 820, when the inclined plane block 820 drives the limit rod 2 819, the connecting plate 818, the connecting rod 817 and the rack 2 816 to move inward, the gear 815 can be engaged to rotate, and then the gear 815 is engaged to drive the rack 1 814, the clamping block 1 813, the moving block 1 811 and the round rod 821 to move outward along the limit rod 1 89. At this time, the spring 1 810 is compressed, and when the clamping block 1 813 is disengaged from the inside of the slot 86, the fixing effect of the piston rod 83 is released.

[0044] like Figure 7 As shown, a determination structure 9 is also included, which is arranged on the mounting base 2. The determination structure 9 includes two mounting blocks 91, which are respectively abutted on both sides of the top of the mounting base 2. The top of the mounting block 91 is connected to a fixed block 92, and the bottom of the mounting block 91 is connected to a vertical rod 93. The bottom end of the vertical rod 93 passes through the mounting base 2 and is connected to an extrusion block 94 located below the connecting arm 6.

[0045] The above scheme is adopted: by setting an extrusion block 94, as the bottom end of the boom and the height monitoring device pass through the boom mounting hole of the arch rib together, the roller 99 can contact and block the edge of the boom mounting hole. As the boom continues to descend, the fixed block 92, the mounting block 91, the vertical rod 93 and the extrusion block 94 will move up along the inside of the mounting seat 2. When the inclined block 820 abuts against the extrusion block 94, it can be determined that the height monitoring device and the bottom end of the boom have completely passed through the mounting hole. As the boom continues to descend, the extrusion block 94 can squeeze the inclined block 820.

[0046] like Figure 3 、 Figure 9 and Figure 10 As shown, limiting grooves 95 are provided on the front and rear sides of the interior of the fixed block 92, a slider 96 is slidably installed inside the limiting groove 95, the inner side of the slider 96 is connected to a wheel frame 98, a roller 99 is movably installed inside the wheel frame 98, one side of the slider 96 is connected to a spring four 97, and the other end of the spring four 97 is connected to the inner wall of the limiting groove 95.

[0047] The above solution is adopted: by setting the roller 99, when the block 1 813 disengages from the inside of the slot 86, the top of the extrusion block 94 will abut against the bottom of the mounting seat 2 to block it. At this time, the fixed block 92 is restricted. As the boom continues to descend, the edge of the boom mounting hole can be squeezed to move the roller 99, the wheel frame 98 and the slider 96 inward along the limit groove 95. At this time, the spring four 97 is compressed, causing the roller 99 to shrink to the inside of the fixed block 92, so that the roller 99 can pass through the boom mounting hole together with the boom.

[0048] like Figure 4As shown, the bottom of the round block 81 is connected to a fixed sleeve 823 located outside the fixed cylinder 82, the outer movable sleeve of the round block 81 is connected to a movable sleeve 828 located inside the fixed sleeve 823, the top of the movable sleeve 828 is connected to a spring three 829, and the other end of the spring three 829 is connected to the round block 81.

[0049] Adopting the above solution: by setting spring three 829, when spring three 829 is compressed, the movable sleeve 828 will be located inside the fixed sleeve 823. Due to the elastic recovery effect of spring three 829, the movable sleeve 828 can be pushed downward to facilitate the subsequent reset of the movable sleeve 828.

[0050] like Figure 4 and Figure 8 As shown, the outer fixed sleeve of the round block 81 is connected to a connecting ring 833 located below the fixed sleeve 823, the bottom of the movable sleeve 828 is connected to a fixing rod 812, the bottom end of the fixing rod 812 passes through the connecting ring 833 and is connected to a closing sleeve 832 located below the connecting ring 833, the outer fixed sleeve of the fixing tube 82 is connected to a fixing ring 830 located below the vent hole 85, and the top of the fixing ring 830 is connected to a rubber block 831.

[0051] The above solution is adopted: by setting a sealing sleeve 832, when the sealing sleeve 832 moves downward and abuts against the rubber block 831, the sealing sleeve 832 will close two-thirds of the vent hole 85, thereby reducing the cross-section of the vent hole 85 and reducing the gas discharge efficiency. When the piston rod 83 is reset by the elastic force, the inefficient exhaust through the vent hole 85 can play a damping and buffering effect.

[0052] like Figure 4 and Figure 6 As shown, the outer side of the clamping block 813 is connected to a round rod 821 located between the rack 814 and the limiting rod 89, the other end of the round rod 821 passes through the round block 81 and extends to the outside of the round block 81 and is connected to the fixed plate 822, and the lower part of the inner side of the fixed plate 822 is connected to a moving rod 825, and the other end of the moving rod 825 extends to the inside of the fixed sleeve 823 and is connected to the moving block 2 824.

[0053] The above solution is adopted: by setting the movable block 2 824, when the clamping block 1 813 moves outward, the round rod 821 drives the fixed plate 822, the movable rod 825 and the movable block 2 824 to move outward, and makes the clamping block 2 827 detach from the movable sleeve 828, thereby releasing the fixation of the movable sleeve 828. At this time, due to the elastic recovery effect of the spring 3 829, the movable sleeve 828, the fixed rod 812 and the closed sleeve 832 will be pushed downward along the connecting ring 833.

[0054] like Figure 6As shown, the internal movable sleeve of the moving block 2 824 is connected to the clamping block 2 827 , the other side of the clamping block 2 827 is clamped inside the movable sleeve 828 , the outer side of the clamping block 2 827 is connected to the spring 2 826 , and the other end of the spring 2 826 is connected to the moving block 2 824 .

[0055] The above scheme is adopted: by setting the second clamping block 827, the construction personnel pull the closing sleeve 832 to the top of the vent hole 85, and release the partial sealing of the vent hole 85 by the closing sleeve 832. Due to the rise of the closing sleeve 832, the fixed rod 812 and the movable sleeve 828 can be driven to move upward along the inside of the connecting ring 833, and as the movable sleeve 828 moves, the clamping block 827 is squeezed and retracted to the inside of the movable block 824. At this time, the spring 826 is compressed. When the internal groove of the movable sleeve 828 moves to the clamping block 827, due to the elastic recovery effect of the spring 826, the clamping block 827 can be pushed to be clamped in the inside of the movable sleeve 828, and the movable sleeve 828 and the closing sleeve 832 are fixed.

[0056] The working principle and use process of the present invention:

[0057] When in use, as the hoisting system is lowered, the boom will gradually approach the arch rib. At this time, the distance between the boom and the arch rib can be monitored by the height monitoring component 5. When the boom is close to the arch rib, the construction personnel can push up the connecting seat 7 while adjusting the bottom end of the boom to align with the arch rib boom mounting hole position, so that the connecting seat 7 drives the piston rod 83 to move upward. Due to the movement of the connecting seat 7, the connecting arm 6 can pull the connecting rod 4 along the axis hinged to the connecting frame 3 to deflect inward, and drive the height monitoring component 5 to retract inward, so that the position of the height monitoring component 5 is located directly below the connecting frame 3. At this time, this position allows the boom to pass through the mounting hole of the arch rib boom together with the height monitoring device during the process of being below. When the piston rod 83 rises, the gas inside the fixed cylinder 82 can be discharged to the outside through the mesh plate 87 and the connecting hole 88. At the same time, the tension spring 84 is stretched. When the piston rod 83 rises to the block 813, the block 813, the moving block 811, the rack 814 and the round rod 821 can be squeezed to move outward along the limit rod 89. At this time, the spring 810 is compressed and squeezes the block 813 to the two sides of the inside of the round block 81. As the piston rod 83 continues to rise until the slot 86 reaches the block 813, due to the elastic recovery effect of the spring 810, the moving block 811 and the block 813 can be pushed to move outward and the block 813 can be stuck into the inside of the slot 86, thereby fixing the piston rod 83. When the piston rod 83 is fixed by the block 813, the height monitoring assembly 5 is now located directly below the connecting frame 3, so that the height monitoring assembly 5 can pass through the boom mounting hole of the arch rib together with the bottom end of the boom, without the need for construction personnel to remove it from the boom.

[0058] After fixing the piston rod 83, the construction personnel pull the closing sleeve 832 to the top of the vent hole 85 to release the partial sealing of the vent hole 85 by the closing sleeve 832. Due to the rise of the closing sleeve 832, the fixed rod 812 and the movable sleeve 828 can be driven to move upward along the inside of the connecting ring 833, and as the movable sleeve 828 moves, the clamping block 2 827 is squeezed and retracted to the inside of the movable block 2 824. At this time, the spring 2 826 is compressed. When the internal groove of the movable sleeve 828 moves to the clamping block 2 827, due to the elastic recovery effect of the spring 2 826, the clamping block 2 827 can be pushed to be connected to the inside of the movable sleeve 828, and the movable sleeve 828 and the closing sleeve 832 are fixed. At this time, the spring 3 829 is compressed, and the lower suspension rod continues.

[0059] As the bottom end of the boom and the height monitoring device pass through the boom mounting hole of the arch rib together, the roller 99 can contact and block the edge of the boom mounting hole. As the boom continues to descend, the fixed block 92, the mounting block 91, the vertical rod 93 and the extrusion block 94 will move up along the inside of the mounting seat 2. When the inclined block 820 abuts against the extrusion block 94, it can be determined that the height monitoring device and the bottom end of the boom have completely passed through the mounting hole. As the boom continues to descend, the extrusion block 94 can squeeze the inclined block 820, the limit rod 2 819, the connecting plate 818, the connecting rod 817 and the rack 2 816 to move inward, and engage the gear 815 to rotate, and then The engagement of gear 815 drives rack 814, block 813, moving block 811 and round rod 821 to move outward along limit rod 89. At this time, spring 810 is compressed. When block 813 disengages from the inside of the slot 86, the fixing effect of piston rod 83 is released. Due to the tension recovery effect of tension spring 84, piston rod 83 and connecting seat 7 can be pulled downward, and connecting rod 4 and height monitoring assembly 5 can be pushed outward and reset through connecting arm 6. After the height monitoring assembly 5 is reset, the height monitoring assembly 5 can be actively unfolded after passing through the mounting hole, and continue to carry out the distance measurement of the bridge deck, so there is no need for manual installation and then distance measurement.

[0060] When the block 1 813 disengages from the inside of the slot 86, the top of the extrusion block 94 will abut against the bottom of the mounting seat 2 to block it. At this time, the fixed block 92 is restricted. As the boom continues to descend, the edge of the boom mounting hole can be squeezed to move the roller 99, the wheel frame 98 and the slider 96 inward along the limit slot 95. At this time, the spring four 97 is compressed, causing the roller 99 to shrink to the inside of the fixed block 92, so that the roller 99 can pass through the boom mounting hole together with the boom.

[0061] When the block 1 813 moves outward, the round rod 821 drives the fixed plate 822, the movable rod 825 and the movable block 2 824 to move outward, and causes the block 2 827 to detach from the movable sleeve 828, thereby releasing the fixation of the movable sleeve 828. At this time, due to the elastic recovery effect of the spring 3 829, the movable sleeve 828, the fixed rod 812 and the closing sleeve 832 will be pushed downward along the connecting ring 833, and the closing sleeve 832 will abut against the rubber block 831. At this time, the closing sleeve 832 will close two-thirds of the vent hole 85, thereby reducing the cross-section of the vent hole 85 and reducing the gas discharge efficiency. When the piston rod 83 is reset by the elastic force, the inefficient exhaust through the vent hole 85 can play a damping and buffering effect, thereby avoiding the vibration caused by the rapid reset of the piston rod 83 and ensuring the stability of the height monitoring component 5.

[0062] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0063] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. The boom construction height monitoring device is characterized by: It comprises a hoop (1), a mounting seat (2), a connecting frame (3) and a telescopic mechanism (8); The hoop (1) is fastened to the outer side of the bottom end of the boom by bolts, the hoop (1) is connected to the mounting seat (2) by bolts, and the mounting seat (2) is located at the bottom end of the boom, the connecting frame (3) is installed at the bottom of the mounting seat (2), and four groups of connecting rods (4) arranged around the bottom of the connecting frame (3) are hinged, each group of connecting rods (4) is composed of two connecting rods (4), and the bottom of each group of connecting rods (4) is hinged with a height monitoring component (5), and the inner side of each group of connecting rods (4) is hinged with a connecting arm (6), and the other side of the connecting arm (6) is hinged with a connecting seat (7), and the telescopic mechanism (8) is arranged at the center of the bottom of the mounting seat (2), and the telescopic mechanism (8) is connected to the connecting seat (7); The telescopic mechanism (8) includes a round block (81), which is connected to the mounting seat (2). The bottom of the round block (81) is fixedly connected to a fixed cylinder (82). A piston rod (83) is sleeved inside the fixed cylinder (82). The bottom end of the piston rod (83) extends to the bottom of the fixed cylinder (82) and is connected to the connecting seat (7). A tension spring (84) is sleeved outside the piston rod (83). One end of the tension spring (84) is connected to the piston rod (83), and the other end of the tension spring (84) is connected to the fixed cylinder (82). Four vent holes (85) located below the piston rod (83) are provided around the outer side of the round block (81). Card grooves (86) are provided on both sides of the interior of the piston rod (83). A plurality of connecting holes (88) arranged around the upper side of the outer side of the round block (81) are provided. A mesh plate (87) is provided above the interior of the round block (81).

2. The boom construction height monitoring device according to claim 1, characterized in that: The lower sides of both sides of the inner part of the circular block (81) are fixedly connected to a limiting rod (89), the outer movably sleeve of the limiting rod (89) is provided with a moving block (811), the top of the moving block (811) is connected with a clamping block (813), the other end of the clamping block (813) extends to the inner part of the middle of the circular block (81), the outer sleeve of the limiting rod (89) is provided with a spring (810), one end of the spring (810) is connected to the moving block (811), and the other end of the spring (810) is connected to the circular block (81).

3. The boom construction height monitoring device according to claim 2, characterized in that: Gears (815) are movably mounted on both sides of the interior of the circular block (81), a rack (814) that can mesh with the gear (815) is connected to the outer side of the clamping block (813), a rack (816) that meshes with the gear (815) is meshed above the gear (815), a connecting rod (817) is connected to the outer side of the rack (816), the other end of the connecting rod (817) is connected to a connecting plate (818), the other side of the connecting plate (818) is connected to a limiting rod (819), the other end of the limiting rod (819) passes through the connecting frame (3) and is connected to a bevel block (820) located on the outer side of the connecting frame (3).

4. The boom construction height monitoring device according to claim 1, characterized in that: The invention also includes a determination structure (9), which is arranged on the mounting seat (2). The determination structure (9) includes two mounting blocks (91), the two mounting blocks (91) respectively abutting against two sides of the top of the mounting seat (2), the top of the mounting block (91) is connected to a fixed block (92), the bottom of the mounting block (91) is connected to a vertical rod (93), the bottom end of the vertical rod (93) passes through the mounting seat (2) and is connected to an extrusion block (94) located below the connecting arm (6).

5. The boom construction height monitoring device according to claim 4, characterized in that: The front and rear sides of the fixed block (92) are both provided with limiting grooves (95), the limiting groove (95) is slidably installed with a slider (96), the inner side of the slider (96) is connected to a wheel frame (98), the wheel frame (98) is movably installed with a roller (99), one side of the slider (96) is connected to a spring four (97), and the other end of the spring four (97) is connected to the inner wall of the limiting groove (95).

6. The boom construction height monitoring device according to claim 3, characterized in that: The bottom of the round block (81) is connected to a fixed sleeve (823) located outside the fixed cylinder (82), the outer movable sleeve of the round block (81) is connected to a movable sleeve (828) located inside the fixed sleeve (823), the top of the movable sleeve (828) is connected to a spring three (829), and the other end of the spring three (829) is connected to the round block (81).

7. The boom construction height monitoring device according to claim 6, characterized in that: The outer fixed sleeve of the round block (81) is connected to a connecting ring (833) located below the fixed sleeve (823); the bottom of the movable sleeve (828) is connected to a fixing rod (812); the bottom end of the fixing rod (812) passes through the connecting ring (833) and is connected to a closing sleeve (832) located below the connecting ring (833); the outer fixed sleeve of the fixed cylinder (82) is connected to a fixing ring (830) located below the vent (85); the top of the fixing ring (830) is connected to a rubber block (831).

8. The boom construction height monitoring device according to claim 7, characterized in that: The outer side of the clamping block (813) is connected to a round rod (821) located between the rack (814) and the limiting rod (89); the other end of the round rod (821) passes through the round block (81) and extends to the outside of the round block (81) and is connected to a fixed plate (822); the lower side of the inner side of the fixed plate (822) is connected to a moving rod (825); the other end of the moving rod (825) extends to the inside of the fixed sleeve (823) and is connected to the moving block (824).

9. The boom construction height monitoring device according to claim 8, characterized in that: The movable sleeve of the second moving block (824) is connected to the second clamping block (827), the other side of the second clamping block (827) is clamped inside the movable sleeve (828), the outer side of the second clamping block (827) is connected to the second spring (826), and the other end of the second spring (826) is connected to the second moving block (824).

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