A foundation pit monitoring device

Abstract

The present invention belongs to the technical field of foundation pit monitoring, and specifically is a foundation pit monitoring device, including a pad, a pair of plug-in columns are provided through the top of the pad, a first connecting piece is provided at the top of the pad, a bracket is provided at the top of the first connecting piece, a second connecting piece is provided on the side of the bracket, and a receiving block is provided at the end of the second connecting piece away from the bracket; in the foundation pit monitoring device described in the present invention, when in use, a laser beam signal emitted by a laser transmitter is received by a receiver on another receiving block; when a bulge appears on the inner wall of the foundation pit, the position where the laser beam signal is emitted changes, so the signal docking between the laser transmitter and the receiver is terminated, and when the signal docking is terminated, the mobile device of the staff issues an early warning; in the above-mentioned monitoring process, the distance between the receiving blocks can be controlled, so the monitoring range of the inner wall of the foundation pit can be improved to ensure the overall monitoring effect.

Description

Technical Field

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

[0002] Foundation pit refers to the space below the ground excavated for the construction of building foundations and basements, and is used in construction projects. In order to ensure the safety of foundation pit construction, the main underground structure and the surrounding environment, it is necessary to support the foundation pit, dewater and excavate it, and carry out corresponding investigation, design, construction and monitoring. This systematic and comprehensive project is called a foundation pit project. During the construction of the foundation pit, the foundation pit needs to be monitored.

[0003] The existing Chinese patent with publication number CN217923786U discloses a foundation pit deformation monitoring device, which solves the problem that the monitoring device may be in a tilted state after the fixed bracket is fixed due to the unevenness in the foundation pit, thereby affecting the monitoring accuracy. The device comprises a fixed base, the top of which is equidistantly equipped with support columns, the top of which is equipped with a mounting plate, and the top of the mounting plate is symmetrically equipped with a fixed seat, and a connecting seat is hinged in the fixed seat;

[0004] The above patent is capable of realizing the lifting and lowering adjustment of the movable plate by providing various components such as the first slide groove, the bidirectional screw rod, the first slider and the movable rod. When used in combination, the inclination angle of the movable plate can be adjusted. When used in combination with the spirit level, the movable plate can be kept in a horizontal state, thereby ensuring the horizontality of the monitoring device, which is beneficial to the deformation monitoring of the foundation pit. However, in actual use, the monitoring range of the inner wall of the foundation pit is limited, which affects the monitoring effect. Therefore, the monitoring device for the inner wall of the foundation pit needs to be further optimized.

[0005] To this end, the present invention provides a foundation pit monitoring device. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: a foundation pit monitoring device described in the present invention comprises a pad, a pair of plug-in columns are provided through the top of the pad, a first connecting member is provided at the top of the pad, a bracket is provided at the top of the first connecting member, a second connecting member is provided on the side of the bracket, and a receiving block is provided at one end of the second connecting member away from the bracket;

[0008] A plurality of mounting holes are provided on the side of the receiving block, a laser transmitter with an output end pointing to a hole on one side is arranged inside the mounting hole, a receiver with a receiving end pointing to a hole on the other side is arranged inside the mounting hole and located on one side of the laser transmitter, and the receiver is used to receive the laser signal emitted by the laser transmitter.

[0009] Preferably, the second connecting member comprises a positioning plate, the end of which is fixed to the side of the bracket, an adjusting plate is arranged on the side of the positioning plate, a fastening bolt is arranged through the side of the adjusting plate, the fastening bolt passes through the positioning plate, the end of the fastening bolt is sleeved with a brake plate, and the end of the fastening bolt is located on one side of the brake plate and is engaged with a fastening nut;

[0010] A receiving tube is arranged at the end of the adjustment plate away from the bracket, a receiving column is inserted into the interior of the receiving tube, a pressure spring is arranged between one end of the receiving column located inside the receiving tube and the inner wall of the receiving tube; the receiving column is located at one end of the receiving tube and is connected to the side of the receiving block.

[0011] Preferably, the support is made of rigid material.

[0012] Preferably, a plurality of glass covers are provided on the side of the receiving block, and the glass covers cover the holes on both sides of the installation hole.

[0013] Preferably, a plurality of conducting tubes are provided on the side of the receiving block, and one end of the conducting tubes passes through the interior of the mounting hole.

[0014] Preferably, a filter screen is provided at one end of the conducting pipe located outside the mounting hole.

[0015] Preferably, a pair of nozzles are symmetrically arranged on the side of the receiving block based on the center line, and the nozzles of the nozzles point to the surface of the glass cover; a hose is connected to the side of the nozzle, and the hose is externally connected to a water pump.

[0016] Preferably, a docking block is arranged at the bottom end of the receiving block, and a docking groove adapted to the docking block is opened at the top end of the receiving block; and a layer of rubber sheet is arranged on the surface of the docking block.

[0017] Preferably, a plurality of annular grooves are provided on the side surface of the receiving block around the mounting hole, an annular cylinder is slidably inserted inside the annular groove, a plurality of receiving plates are provided at the end of the annular cylinder outside the annular groove, a connecting column is provided through the side surface of the receiving plate, a cutting steel wire is provided at the end of the connecting column away from the annular groove, and after installation, the cutting steel wires installed on different receiving blocks are correspondingly butt-jointed by welding; a connecting plate is provided at one end of the connecting column close to the annular groove, a plurality of connecting springs are provided between the connecting plate and the receiving plate; a gear ring is sleeved on one end of the annular cylinder outside the annular groove, a tooth belt is meshedly connected to the outside of the gear ring, a driving gear is meshedly connected to the inside of the tooth belt, a driving motor is provided at the end of the second connecting member, and the end of the output end of the driving motor is connected to the driving gear.

[0018] Preferably, the first connecting member includes a supporting member; the supporting member is installed at the top of the pad, and the top of the supporting member is rotatably connected to the bottom of the bracket by a rotating shaft; a pair of hydraulic cylinders are symmetrically arranged on both sides of the supporting member, and the top of the output end of the hydraulic cylinder is pressed against the bottom end of the bracket.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. A foundation pit monitoring device described in the present invention is provided with a receiving block, on which a laser transmitter and a receiver are provided. When in use, a laser beam signal emitted by the laser transmitter is received by a receiver on another receiving block, and the laser beam signal is parallel to and attached to the inner wall of the foundation pit; when a bulge appears on the inner wall of the foundation pit, the bulged portion of the inner wall of the foundation pit will block the path of the laser beam signal, or the bulged portion drives the receiving block to move, resulting in a change in the position where the laser beam signal is emitted, so that the signal docking between the laser transmitter and the receiver is terminated, and the receiver is connected to the mobile device of the staff through an electrical signal; when the signal docking is terminated, the mobile device of the staff issues an early warning to remind the staff to handle it; in the above monitoring process, the distance between the receiving blocks can be controlled, so that the monitoring range of the inner wall of the foundation pit can be increased to ensure the overall monitoring effect.

[0021] 2. The foundation pit monitoring device described in the present invention is provided with a glass cover. When in use, the glass cover covers the holes on both sides of the installation hole. The glass cover does not affect the propagation of the laser beam signal. The glass cover can prevent external dust from entering the installation hole, thereby isolating and protecting the laser transmitter and receiver. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 is a stereogram of the present invention;

[0024] Figure 2 is a schematic diagram of a second connecting member of the present invention;

[0025] Figure 3 It is a schematic diagram of a receiving column of the present invention;

[0026] Figure 4 It is a schematic diagram of the connection structure of the receiving block of the present invention;

[0027] Figure 5 is a schematic diagram of a conducting tube of the present invention;

[0028] Figure 6 is a schematic diagram of a laser transmitter and a receiver of the present invention;

[0029] Figure 7 It is a schematic diagram of the position of the docking block on the receiving block of the present invention;

[0030] Figure 8 is a schematic diagram of a first connecting member of the present invention;

[0031] Fig. 9 It is a schematic diagram of the filter screen connection structure of the present invention;

[0032] Fig.10 is a schematic diagram of a laser transmitter and a receiver of the present invention;

[0033] Fig.11 It is a schematic diagram of the structure of both sides of the receiving block of the present invention;

[0034] Fig.12 It is a schematic diagram of the structure of the pad of the present invention.

[0035] In the figure: 1, pad; 11, plug column; 12, first connecting member; 121, support member; 122, rotating shaft; 123, hydraulic cylinder; 13, bracket; 14, second connecting member; 141, positioning plate; 142, adjustment plate; 143, fastening bolt; 144, fastening nut; 145, brake plate; 146, receiving tube; 147, receiving column; 148, pressure spring; 15, receiving block; 151, glass Glass cover; 2. Mounting hole; 21. Laser transmitter; 22. Receiver; 23. Conducting tube; 24. Filter; 25. Nozzle; 26. Hose; 27. Docking groove; 28. Docking block; 3. Annular groove; 31. Annular cylinder; 32. Gear ring; 33. Gear belt; 34. Driving gear; 35. Driving motor; 4. Socket plate; 41. Connecting column; 42. Connecting plate; 43. Connecting spring; 44. Cutting steel wire. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0037] like Figures 1 to 12As shown, a foundation pit monitoring device according to an embodiment of the present invention comprises a base plate 1, a pair of plug-in columns 11 are provided through the top of the base plate 1, a first connecting member 12 is provided at the top of the base plate 1, a bracket 13 is provided at the top of the first connecting member 12, a second connecting member 14 is provided on the side of the bracket 13, and a receiving block 15 is provided at one end of the second connecting member 14 away from the bracket 13;

[0038] A plurality of mounting holes 2 are provided on the side of the receiving block 15. A laser emitter 21 with an output end pointing to a hole on one side is provided inside the mounting hole 2. A receiver 22 with a receiving end pointing to a hole on the other side is provided inside the mounting hole 2 and located on one side of the laser emitter 21. The receiver 22 is used to receive the laser signal emitted by the laser emitter 21.

[0039] When the prior art is in use, the monitoring range of the inner wall of the foundation pit is limited, which affects the monitoring effect; therefore, the monitoring device for the inner wall of the foundation pit needs to be further optimized; to solve the above problems, the embodiment of the present invention provides a receiving block 15, and when in use, the receiving block 15 is pressed against the inner wall of the foundation pit near the boundary position, and a pair of receiving blocks 15 are placed on one inner wall, and the position of the receiving block 15 is fixed by the pad 1, the bracket 13 and the second connecting member 14, and the laser transmitter 21 and the receiver 22 in the mounting hole 2 are started, and the laser beam signal emitted by the laser transmitter 21 is received by the receiver 22 on the other receiving block 15, and the laser beam signal is parallel to the inner wall of the foundation pit and attached to The inner wall of the foundation pit, and then the pad 1 is fixed in the foundation pit by the plug-in column 11; when the inner wall of the foundation pit bulges, the protruding part of the inner wall of the foundation pit will block the path of the laser beam signal, or the protruding part drives the receiving block 15 to move, resulting in the change of the position of the laser beam signal, so the signal docking between the laser transmitter 21 and the receiver 22 is terminated, and the receiver 22 is connected to the staff's mobile device through an electrical signal; when the signal docking is terminated, the staff's mobile device issues an early warning to remind the staff to handle it; in the above monitoring process, the distance between the receiving blocks 15 can be controlled, so the monitoring range of the inner wall of the foundation pit can be increased to ensure the overall monitoring effect.

[0040] The second connecting member 14 includes a positioning plate 141, the end of which is fixed to the side of the bracket 13, an adjusting plate 142 is provided on the side of the positioning plate 141, a fastening bolt 143 is provided through the side of the adjusting plate 142, the fastening bolt 143 passes through the positioning plate 141, the end of the fastening bolt 143 is sleeved with a brake plate 145, and a fastening nut 144 is sleeved and engaged with the end of the fastening bolt 143 and located on one side of the brake plate 145;

[0041] The end of the adjusting plate 142 away from the bracket 13 is provided with a receiving tube 146, and a receiving column 147 is inserted in the receiving tube 146. A pressure spring 148 is provided between one end of the receiving column 147 located inside the receiving tube 146 and the inner wall of the receiving tube 146; the receiving column 147 is located at one end of the receiving tube 146 and is connected to the side of the receiving block 15; for the inner wall of the foundation pit with different slopes, the angle of the receiving block 15 can be adjusted by adjusting the angle of the adjusting plate 142 to cooperate with the receiving tube 146 and the receiving column 147, so that one side of the receiving block 15 is parallel to the inner wall of the foundation pit, ensuring that the laser on the receiving block 15 The laser signal emitted by the transmitter 21 is close to the inner wall of the foundation pit, thereby ensuring the monitoring effect; specifically, when fixing the adjustment plate 142 and its position relative to the positioning plate 141, by twisting the fastening nut 144, the fastening nut 144 and the fastening bolt 143 are engaged and transmitted to drive the brake plate 145 to press against the adjustment plate 142, so that the adjustment plate 142 is fixed to the position of the positioning plate 141 by friction, and then when the receiving block 15 is pressed against the inner wall of the foundation pit, the pressing spring 148 can continuously provide pressing force to ensure that the receiving block 15 is continuously pressed against the inner wall of the foundation pit, thereby optimizing the stability of use.

[0042] The bracket 13 is made of rigid material, which can minimize the elastic deformation of the bracket 13, so that the receiving block 15 is not easy to move after the position is determined, thereby improving the working stability of the receiving block 15.

[0043] A plurality of glass covers 151 are arranged on the side of the receiving block 15, and the glass covers 151 cover the holes on both sides of the mounting hole 2; when in use, the glass covers 151 cover the holes on both sides of the mounting hole 2, and the glass covers 151 do not affect the propagation of the laser beam signal. The glass covers 151 can prevent external dust from entering the mounting hole 2, and isolate and protect the laser transmitter 21 and the receiver 22.

[0044] A plurality of conducting tubes 23 are arranged on the side of the receiving block 15, and one end of the conducting tube 23 passes through the interior of the mounting hole 2; the conducting tube 23 connects the mounting hole 2 with the outside, so as to facilitate the discharge of heat inside the mounting hole 2, so that the laser transmitter 21 and the receiver 22 can continuously maintain a good working temperature; and the end of the conducting tube 23 outside the mounting hole 2 points downward, avoiding the risk of rainwater entering the mounting hole 2 through the conducting tube 23.

[0045] A filter 24 is disposed at one end of the conducting tube 23 outside the mounting hole 2 ; the filter 24 blocks external dust from entering the mounting hole 2 through the conducting tube 23 , thereby isolating and protecting the laser transmitter 21 and the receiver 22 from dust.

[0046] A pair of nozzles 25 are symmetrically arranged on the side of the receiving block 15 based on the center line, and the nozzles of the nozzles 25 point to the surface of the glass cover 151; a hose 26 is connected to the side of the nozzle 25, and a water pump is externally connected to the hose 26; during the monitoring operation, the water pump externally connected to the hose 26 is intermittently started, and the water pump draws liquid water from the outside into the nozzle 25 through the hose 26, and then sprays it to the surface of the glass cover 151 through the nozzle 25, thereby flushing the surface of the glass cover 151 to prevent a large amount of dust from adhering to the surface of the glass cover 151 and hindering the propagation of the laser beam signal; and after flushing, the water attached to the surface of the glass cover 151 will slide to the bottom position, and then dry naturally without hindering the propagation of the laser beam signal.

[0047] A docking block 28 is provided at the bottom end of the receiving block 15, and a docking groove 27 adapted to the docking block 28 is provided at the top end of the receiving block 15; when in use, the docking block 28 can be used in conjunction with the docking groove 27, and different receiving blocks 15 can be stacked and fixed, and a laser transmitter 21 and a receiver 22 are installed on the receiving block 15 to implement detection; therefore, setting up multiple receiving blocks 15 means adding multiple monitoring points, thereby increasing the detection range; a layer of rubber sheet is provided on the surface of the docking block 28; when the docking block 28 is inserted into the docking groove 27, the rubber sheet on the surface of the docking block 28 can improve the firmness of the plug-in, so that different receiving blocks 15 can be stacked stably.

[0048] A plurality of annular grooves 3 are provided around the mounting hole 2 on the side of the receiving block 15, and an annular cylinder 31 is slidably inserted inside the annular groove 3, and a plurality of receiving plates 4 are provided at the end of the annular cylinder 31 outside the annular groove 3, and a connecting column 41 is provided through the side of the receiving plate 4, and a cutting steel wire 44 is provided at the end of the connecting column 41 away from the annular groove 3. After installation, the cutting steel wires 44 installed on different receiving blocks 15 are correspondingly butt-jointed by welding; a connecting plate 42 is provided at one end of the connecting column 41 close to the annular groove 3, and a plurality of connecting springs 43 are provided between the connecting plate 42 and the receiving plate 4; a gear ring 32 is sleeved on one end of the annular cylinder 31 outside the annular groove 3, and a toothed belt 33 is meshedly connected to the outside of the gear ring 32, and a driving gear 34 is meshedly connected to the inside of the toothed belt 33, and a driving motor 35 is provided at the end of the second connecting member 14, and the end of the output end of the driving motor 35 is connected to the driving gear 34;

[0049] During the monitoring process, for the inner wall of the foundation pit that has not been trimmed for a long time, weeds are easy to grow on the inner wall of the foundation pit. These weeds will grow outward along the inner wall of the foundation pit. The leaves of the grown weeds may block the laser beam signal, so a cutting steel wire 44 is set; during the monitoring process, a starting program of the drive motor 35 is set to make the drive motor 35 start intermittently. When the drive motor 35 is started, the drive motor 35 drives the drive gear 34 to rotate. The drive gear 34 drives the annular cylinder 31 to rotate inside the annular groove 3 through the gear ring 32 and the toothed belt 33. The annular cylinder 31 carries the receiving plate 4 to rotate synchronously, and the receiving plate 4 The cutting steel wire 44 is driven by the connecting column 41 to rotate around the laser line signal emitted by the laser emitter 21, so the weed blades on the laser beam signal path will be cut off by the cutting steel wire 44, avoiding the weed blades on the inner wall of the foundation pit from blocking the laser beam signal path, thereby ensuring the stability of the detection process; in addition, after the cutting steel wire 44 is installed, the connecting spring 43 remains in a compressed state, so the connecting spring 43 continuously stretches the cutting steel wire 44 through the connecting plate 42 and the connecting column 41, causing the cutting steel wire 44 to be continuously tightened, so that the cutting steel wire 44 has a good cutting effect when cutting weed blades.

[0050] The first connecting member 12 includes a support member 121; the support member 121 is installed at the top of the pad 1, and the top of the support member 121 is rotatably connected to the bottom of the bracket 13 by a rotating shaft 122; a pair of hydraulic cylinders 123 are symmetrically arranged on both sides of the support member 121, and the top of the output end of the hydraulic cylinder 123 is pressed against the bottom of the bracket 13; when adjusting the position of the receiving block 15, by starting the hydraulic cylinder 123, the output end of the hydraulic cylinder 123 controls the angle of the bracket 13, and the rotating shaft 122 at the top of the support member 121 is supported. The change in the angle of the bracket 13 will drive the receiving block 15 to change synchronously, thereby realizing the adjustment of the position of the laser emitter 21 on the receiving block 15, and facilitating the docking of laser beam signals on different receiving blocks 15.

[0051] During operation, the receiving block 15 is pressed against the inner wall of the foundation pit near the boundary position, and a pair is placed on one inner wall. The position of the receiving block 15 is fixed by the pad 1, the bracket 13 and the second connecting piece 14, and the laser emitter 21 and the receiver 22 in the mounting hole 2 are started. The laser beam signal emitted by the laser emitter 21 is received by the receiver 22 on the other receiving block 15, and the laser beam signal is parallel to and attached to the inner wall of the foundation pit. Then, the pad 1 is fixed in the foundation pit by the plug-in column 11; when the inner wall of the foundation pit is bulged, the bulged part of the inner wall of the foundation pit will block the path of the laser beam signal, or the bulged part drives the receiving block 15 to move, resulting in a change in the position where the laser beam signal is emitted, so the signal docking between the laser emitter 21 and the receiver 22 is terminated, and the receiver 22 is connected to the mobile device of the staff through an electrical signal; when the signal docking is terminated, the mobile device of the staff issues an early warning to remind the staff to handle it; the above-mentioned monitoring During the process, the distance between the receiving blocks 15 can be controlled, so the monitoring range of the inner wall of the foundation pit can be increased to ensure the overall monitoring effect; for the inner wall of the foundation pit with different slopes, the angle of the receiving block 15 can be adjusted by adjusting the angle of the adjusting plate 142 in conjunction with the receiving tube 146 and the receiving column 147, so that one side of the receiving block 15 is parallel to the inner wall of the foundation pit, ensuring that the laser signal emitted by the laser transmitter 21 on the receiving block 15 is close to the inner wall of the foundation pit, thereby ensuring the monitoring effect; specifically, when fixing the adjusting plate 142 and its position relative to the positioning plate 141, by twisting the fastening nut 144, the fastening nut 144 is engaged with the fastening bolt 143 to drive the brake plate 145 to press against the adjusting plate 142, so that the adjusting plate 142 is fixed to the position of the positioning plate 141 by friction, and then when the receiving block 15 is pressed against the inner wall of the foundation pit, the pressing spring 148 can continuously provide pressing force to ensure that the receiving block 15 is continuously pressed against the inner wall of the foundation pit, thereby optimizing the stability of use.

[0052] When in use, the glass cover 151 covers the holes on both sides of the mounting hole 2. The glass cover 151 does not affect the propagation of the laser beam signal. The glass cover 151 can prevent external dust from entering the mounting hole 2, and isolate and protect the laser transmitter 21 and the receiver 22; the conducting tube 23 connects the mounting hole 2 with the outside world, which is convenient for discharging the heat inside the mounting hole 2, so that the laser transmitter 21 and the receiver 22 continue to maintain a good working temperature; and the end of the conducting tube 23 outside the mounting hole 2 points downward, avoiding the risk of rainwater entering the mounting hole 2 through the conducting tube 23; a filter 24 is provided at one end of the conducting tube 23 outside the mounting hole 2; the filter 24 prevents external dust from entering the mounting hole 2 through the conducting tube 23, and protects the laser transmitter 2 1 and the receiver 22 are isolated from dust for protection; during the monitoring operation, the water pump connected to the hose 26 is intermittently started, and the water pump draws liquid water from the outside into the nozzle 25 through the hose 26, and then sprays it to the surface of the glass cover 151 through the nozzle 25, thereby washing the surface of the glass cover 151 to prevent a large amount of dust from adhering to the surface of the glass cover 151 and hindering the propagation of the laser beam signal; when in use, the docking block 28 and the docking slot 27 can be used in conjunction, and different receiving blocks 15 can be stacked and fixed, thereby increasing the detection range; a layer of rubber sheet is provided on the surface of the docking block 28; when the docking block 28 is inserted into the docking slot 27, the rubber sheet on the surface of the docking block 28 can improve the firmness of the plug-in, so that different receiving blocks 15 are stacked stably.

[0053] During the monitoring process, for the inner wall of the foundation pit that has not been trimmed for a long time, weeds are prone to grow on the inner wall of the foundation pit. These weeds will grow outward along the inner wall of the foundation pit. The leaves of the grown weeds may block the laser beam signal, so a cutting steel wire 44 is set; during the monitoring process, a starting program of the drive motor 35 is set to make the drive motor 35 start intermittently. When the drive motor 35 is started, the drive motor 35 drives the drive gear 34 to rotate, and the drive gear 34 drives the annular cylinder 31 to rotate inside the annular groove 3 through the gear ring 32 and the toothed belt 33. The annular cylinder 31 carries the receiving plate 4 to rotate synchronously, and the receiving plate 4 drives the cutting steel wire 44 to rotate around the laser line signal emitted by the laser emitter 21 through the connecting column 41. Therefore, the weed leaves on the laser beam signal path will be cut off by the cutting steel wire 44 to avoid the foundation pit. The blades of weeds on the inner wall of the pit block the path of the laser beam signal, ensuring the stability of the detection process; in addition, after the cutting steel wire 44 is installed, the connecting spring 43 remains in a compressed state, so the connecting spring 43 continuously stretches the cutting steel wire 44 through the connecting plate 42 and the connecting column 41, causing the cutting steel wire 44 to be continuously tightened, so that the cutting steel wire 44 has a good cutting effect when cutting weed leaves; when adjusting the position of the receiving block 15, by starting the hydraulic cylinder 123, the output end of the hydraulic cylinder 123 controls the angle of the bracket 13, which is supported by the rotating shaft 122 at the top of the support 121. The change in the angle of the bracket 13 will drive the receiving block 15 to change synchronously, thereby realizing the adjustment of the position of the laser emitter 21 on the receiving block 15, and facilitating the docking of laser beam signals on different receiving blocks 15.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A foundation pit monitoring device, characterized in that: It comprises a pad, a pair of plug-in columns are provided through the top of the pad, a first connector is provided at the top of the pad, a bracket is provided at the top of the first connector, a second connector is provided on the side of the bracket, and a receiving block is provided at one end of the second connector away from the bracket; A plurality of mounting holes are provided on the side of the receiving block, a laser transmitter with an output end pointing to a hole on one side is arranged inside the mounting hole, and a receiver with a receiving end pointing to a hole on the other side is arranged inside the mounting hole and located on one side of the laser transmitter, and the receiver is used to receive the laser signal emitted by the laser transmitter; The second connecting member comprises a positioning plate, the end of which is fixed to the side of the bracket, an adjusting plate is arranged on the side of the positioning plate, a fastening bolt is arranged through the side of the adjusting plate, the fastening bolt passes through the positioning plate, the end of the fastening bolt is sleeved with a brake plate, and the end of the fastening bolt is sleeved with a fastening nut on one side of the brake plate; The end of the adjustment plate away from the bracket is provided with a receiving tube, a receiving column is inserted into the interior of the receiving tube, and a pressure spring is provided between one end of the receiving column located inside the receiving tube and the inner wall of the receiving tube; the receiving column is located at one end of the receiving tube and is connected to the side of the receiving block; The side of the receiving block is provided with a plurality of annular grooves around the mounting hole, an annular cylinder is slidably inserted inside the annular groove, a plurality of receiving plates are provided at the end of the annular cylinder outside the annular groove, a connecting column is provided through the side of the receiving plate, and a cutting steel wire is provided at the end of the connecting column away from the annular groove.

2. A foundation pit monitoring device according to claim 1, characterized in that: The support is made of a rigid material.

3. A foundation pit monitoring device according to claim 1, characterized in that: A plurality of glass covers are arranged on the side of the receiving block, and the glass covers cover the holes on both sides of the installation hole.

4. A foundation pit monitoring device according to claim 3, characterized in that: A plurality of conducting tubes are arranged on the side of the receiving block, and one end of the conducting tube passes through the interior of the mounting hole.

5. A foundation pit monitoring device according to claim 4, characterized in that: A filter screen is arranged at one end of the conducting pipe outside the mounting hole.

6. A foundation pit monitoring device according to claim 4, characterized in that: A pair of nozzles are symmetrically arranged on the side of the receiving block based on the center line, and the nozzles of the nozzles point to the surface of the glass cover; a hose is connected to the side of the nozzle, and the hose is externally connected to a water pump.

7. A foundation pit monitoring device according to claim 1, characterized in that: A docking block is arranged at the bottom end of the receiving block, and a docking groove adapted to the docking block is opened at the top end of the receiving block; a layer of rubber sheet is arranged on the surface of the docking block.

8. A foundation pit monitoring device according to claim 1, characterized in that: After installation, the cutting steel wires installed on different receiving blocks are connected to each other by welding; a connecting plate is provided at one end of the connecting column close to the annular groove, and a plurality of connecting springs are provided between the connecting plate and the receiving plate; a gear ring is sleeved on one end of the annular cylinder outside the annular groove, a toothed belt is meshedly connected to the outside of the gear ring, and a driving gear is meshedly connected to the inside of the toothed belt, and a driving motor is provided at the end of the second connecting piece, and the end of the output end of the driving motor is connected to the driving gear.

9. A foundation pit monitoring device according to claim 1, characterized in that: The first connecting member includes a support member; the support member is installed at the top of the pad, and the top of the support member is rotatably connected to the bottom of the bracket by a rotating shaft; a pair of hydraulic cylinders are symmetrically arranged on both sides of the support member, and the top of the output end of the hydraulic cylinder presses against the bottom end of the bracket.

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