Angle detection device for building

Abstract

The invention discloses an angle detection device for construction, and relates to the technical field of angle detection devices for construction, the angle detection device for construction comprises a base, a plug pin is fixed at the bottom of the base, a driving device is arranged in the base, and the driving device comprises a motor, a pinion and a gearwheel. And the motor is fixed on the inner wall of the base. According to the angle detection device for the building, by arranging the protection frame, an emitting head of a laser emitter can be covered, the effect of protecting the emitting head can be achieved, when a motor is started, a small gear can drive a large gear to rotate, a supporting column is made to rotate, and the laser emitter on a fixing disc is driven to rotate; meanwhile, the pointer and the irradiation direction of the laser emitter are driven to deflect by the same angle, the deflection angle can be displayed through the arc-shaped graduated scale, the angle error is smaller through irradiation of the laser emitter, and meanwhile operation convenience is improved.

Description

Technical Field

[0001] This invention relates to the technical field of angle detection devices for buildings, specifically an angle detection device for buildings. Background Technology

[0002] In construction projects, a large number of sheet materials are used. When using them, they usually need to be cut into different sizes and spliced ​​together as needed. In order to ensure the quality of the project and the stability and safety of the building structure, the angle of the cut materials needs to be checked during the construction process.

[0003] The aforementioned angle detection device for buildings does not have the function of protecting the laser emitter head during detection operations. As a result, the laser emitter head is exposed to the outside for a long time and is easily damaged by collisions. In addition, due to the large amount of dust in the building site, a large amount of dust can easily adhere to the emitter head. Dust particles can cause beam divergence and distortion, affecting the focusing effect and reducing the ranging accuracy. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an angle detection device for construction, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an angle detection device for construction, comprising a base, a pin fixed to the bottom of the base, a driving device inside the base, the driving device comprising a motor, a pinion, and a gear, the motor fixed to the inner wall of the base, the pinion fixed to the output end of the motor, the outer wall of the gear meshing with the outer wall of the pinion, a support column fixed to the inner wall of the gear, the bottom of the support column rotatably mounted on the inner wall of the base, a fixed plate fixed to the top of the support column, a laser emitter detachably mounted on the top of the fixed plate, a protective device for protecting the emitter head of the laser emitter on the top of the base, and an auxiliary device for dehumidification on the protective device; by starting the motor, the pinion can be rotated, thereby causing the gear to rotate the support column, which in turn causes the fixed plate to rotate the laser emitter.

[0006] The protective device includes a baffle plate, a circular groove, a support rod, a rotating block, a rotating wheel, a ring, a pointer, and a protective frame. The baffle plate is fixed to the top of the base, the circular groove is formed on the top of the base, the support rod is fixed to the outer wall of the support column, the rotating block is fixed to the end of the support rod, the rotating wheel is rotatably mounted on the bottom of the rotating block, the ring is fixed to the top of the rotating block, and the protective frame is fixed to the inner side of the ring. When the laser emitter is not in use, the motor can be started, causing the support column to rotate the support rod, which in turn rotates the ring via the rotating block. This causes the ring to rotate the protective frame, which then rotates to the baffle plate position, blocking the exposed surface of the protective frame and preventing dust and other contaminants from entering.

[0007] According to the above technical solution, the pointer is fixed at the top of the ring, and an arc-shaped scale is fixed on the inner side of the shield. When the ring rotates, it can drive the pointer to rotate.

[0008] According to the above technical solution, the auxiliary device includes an arc-shaped rack, a threaded rod, a gear, an air box, a piston rod, a piston plate, an air inlet pipe, a threaded plate, an air outlet pipe, an L-shaped extrusion block, a T-shaped block, a connecting spring, a heat-conducting plate, a connecting rod, an extrusion spring, a semi-circular block, and a friction plate. The arc-shaped rack is fixed to the outer wall of the baffle plate, the threaded rod is rotatably mounted on the top of the protective frame, the gear is fixed to the outer wall of the threaded rod, the threaded plate is threadedly connected to the outer wall of the threaded rod, and the air box is fixed to the top of the protective frame. When the ring drives the gear to mesh with the arc-shaped rack, the gear will rotate. When the gear rotates, the threaded rod can drive the threaded plate to move on the threaded rod.

[0009] According to the above technical solution, the piston rod passes through the top of the air box and is slidably connected at the penetration point. The piston plate is fixed to the bottom of the piston rod, the air inlet pipe is fixed to the bottom of the air box, the air inlet pipe is connected to the protective frame, the air outlet pipe is fixed to the side wall of the air box, and a one-way valve is fixed to the outer wall of the air inlet pipe and the air outlet pipe.

[0010] According to the above technical solution, the L-shaped extrusion block is fixed to the side wall of the threaded plate, the T-shaped block is slidably installed on the outer wall of the protective frame, one side of the connecting spring is fixed to the side wall of the T-shaped block, the other side of the connecting spring is fixed to the inner side of the protective frame, the semi-circular block is fixed to the side wall of the T-shaped block, and the connecting rod passes through the T-shaped block and is slidably connected at the point of penetration.

[0011] According to the above technical solution, the heat-conducting sheet is fixed to the side wall of the protective frame, the friction sheet is fixed to the end of the connecting rod, one side of the compression spring is fixed to the side wall of the T-shaped block, and the other side of the compression spring is fixed to the protrusion at the end of the connecting rod. The outer wall of the heat-conducting sheet is in contact with the outer wall of the friction sheet. When the threaded plate moves, it can drive the L-shaped compression block to move, which will cause the end of the L-shaped compression block to compress the arc surface of the semicircular block, thereby causing the semicircular block to move under the compression force, driving the T-shaped block to move, so that the friction sheet can rub back and forth on the heat-conducting sheet.

[0012] According to the above technical solution, the protective frame is equipped with a processing device to improve the measurement accuracy of the laser emitter. The processing device includes an L-shaped block, a striking block, a pressing plate, a transmission rod, a long plate, an arc plate, an inclined plate, and a spring plate. The L-shaped block is fixed to the side wall of the T-shaped block, the striking block is fixed to the side wall of the L-shaped block, and the pressing plate is fixed to the bottom of the L-shaped block. When the T-shaped block moves, it can drive the L-shaped block to move, so that the L-shaped block can drive the striking block to strike the outer wall of the laser emitter.

[0013] According to the above technical solution, the inclined plate is slidably installed on the inner wall of the protective frame, one side of the spring sheet is fixed to the bottom of the inclined plate, the bottom of the spring sheet is fixed to the inner wall of the protective frame, the transmission rod is fixed to the bottom of the inclined plate and passes through the bottom of the protective frame, and the passage is slidably connected, the long plate is fixed to the bottom of the transmission rod, and the arc plate is fixed to the top of the long plate, and they are arranged in a linear array.

[0014] This invention provides an angle detection device for construction. It has the following advantages: 1. This invention, by setting up a protective device and a protective frame, can cover the emitting head of the laser emitter, thus protecting it. When the motor is started, the small gear drives the large gear to rotate, causing the support column to rotate, which in turn drives the laser emitter on the fixed plate to rotate. At the same time, the pointer deflects by the same angle as the direction of the laser emitter's illumination, and the deflection angle can be displayed by an arc-shaped scale. The illumination by the laser emitter reduces the angle error and improves the convenience of operation. When not in use, the motor can rotate the protective frame to fit against the inside of the shielding plate, solving the problem of the laser emitter's emitting head being exposed, which easily leads to a large amount of dust and other impurities adhering to the outer wall of the emitting head.

[0015] 2. This invention, through the inclusion of an auxiliary device, allows the laser emitter to rotate out of the shielding plate via the ring. This causes the gear to move on the arc-shaped teeth, rotating the gear and causing the threaded plate on the threaded rod to move upward. This, in turn, moves the piston plate upward, allowing the air intake pipe to draw air out of the protective frame. This solves the problem that when the protective frame is exposed, the air inside may contain floating dust, which could affect laser emission and lead to inaccurate detection data. Furthermore, when the threaded plate moves, it can move the L-shaped extrusion block. Through the arrangement of multiple sets of semi-circular blocks, the friction plate can move back and forth on the heat-conducting plate, generating heat and drying the moisture inside the protective frame. This solves the problem that moisture inside the protective frame can condense at the emitter head, affecting laser emission.

[0016] 3. This invention, through the setting of a processing device, uses the back-and-forth movement of the L-shaped block to allow the striking block to strike the outer wall of the laser emitter, thereby knocking off dust and other debris adhering to the laser emitter head. This prevents a large amount of impurities from adhering to the emitter head, which could obstruct the emitted laser and lead to inaccurate test results. Furthermore, the back-and-forth movement of the L-shaped block allows the extrusion plate to move back and forth on the arc surface of the arc plate, thereby causing the tilting plate to shake back and forth. This allows the dust falling off the emitter head to be discharged from the protective frame through the back-and-forth shaking of the tilting plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic cross-sectional view of the present invention; Figure 4 This is a partial structural diagram of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of structure A; Figure 6 This is a partial cross-sectional view of the present invention; Figure 7 This is a partial structural diagram of the present invention.

[0018] In the diagram: 1. Base; 2. Insert pin; 3. Drive unit; 4. Support column; 5. Fixing plate; 7. Laser emitter; 81. Shielding plate; 82. Circular groove; 83. Support rod; 84. Rotating block; 85. Rotating wheel; 86. Ring; 87. Pointer; 88. Protective frame; 91. Arc-shaped tooth; 92. Threaded rod; 93. Gear; 94. Air box; 95. Threaded plate; 96. Piston rod; 97. Inlet pipe; 98. 99. Exhaust pipe; 910. L-shaped extrusion block; 911. T-shaped block; 912. Semicircular block; 913. Connecting spring; 914. Heat-conducting plate; 915. Connecting rod; 916. Friction plate; 917. Extrusion spring; 918. Piston plate; 101. L-shaped block; 102. Striking block; 103. Inclined plate; 104. Spring plate; 105. Transmission rod; 106. Long plate; 107. Extrusion plate; 108. Arc plate. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-7 One embodiment of the present invention is as follows: an angle detection device for construction includes a base 1, with a pin 2 fixed at the bottom of the base 1. The pin 2 is inserted into the soil of the construction site to fix the device. A drive device 3 is provided inside the base 1. The drive device 3 includes a motor, a pinion gear, and a gear. The motor is fixed to the inner wall of the base 1, the pinion gear is fixed to the output end of the motor, and the outer wall of the gear meshes with the outer wall of the pinion gear. A support column 4 is fixed to the inner wall of the gear. The bottom of the support column 4 is rotatably mounted on the inner wall of the base 1. A fixing plate 5 is fixed to the top of the support column 4. A laser emitter 7 is detachably mounted on the top of the fixing plate 5. By starting the motor, the pinion gear can be rotated, which drives the gear to rotate. The gear can drive the support column 4 to rotate, thereby adjusting the angle of the laser emitter 7 on the fixing plate 5. A protective device is provided on the top of the base 1 to protect the emitting head of the laser emitter 7. The protective device includes a baffle plate 81, a circular groove 82, a support rod 83, a rotating block 84, a rotating wheel 85, a circular ring 86, a pointer 87, and a protective frame 88. The baffle plate 81 is fixed to the top of the base 1, the circular groove 82 is opened on the top of the base 1, the support rod 83 is fixed to the outer wall of the support column 4, the rotating block 84 is fixed to the end of the support rod 83, the rotating wheel 85 is rotatably installed at the bottom of the rotating block 84, the circular ring 86 is fixed to the top of the rotating block 84, the protective frame 88 is fixed to the inner side of the circular ring 86, the protective frame 88 is made of metal, the pointer 87 is fixed to the top of the circular ring 86, and an arc-shaped scale is fixed to the inner side of the baffle plate 81.

[0021] By setting up a protective frame 88, the emitting head of the laser emitter 7 can be covered, thus protecting the emitting head. When the drive device 3 is started, the small gear drives the large gear to rotate, causing the support column 4 to rotate, which in turn drives the laser emitter 7 on the fixed plate 5 to rotate. At the same time, the pointer 87 deflects by the same angle as the direction of the laser emitter 7. The angle of deflection can be displayed by the arc scale. The irradiation by the laser emitter 7 reduces the angle error and improves the convenience of operation. Furthermore, when not in use, the drive device 3 can rotate the protective frame 88 to fit against the inner side of the shield 81, thus solving the problem that the front of the laser emitter 7's emitter head is exposed, which easily leads to a large amount of dust and other impurities adhering to the outer wall of the emitter head.

[0022] In operation, the device works as follows: When the device needs to be used, the pin 2 is inserted into the position to be measured. The laser emitter 7 is activated, emitting laser light through the emitting head for measurement. The drive device 3 is activated, which drives the pinion gear to rotate, causing the pinion gear to rotate the gear, thus rotating the support column 4. This causes the fixed plate 5 to rotate the laser emitter 7, adjusting its angle. Simultaneously, the rotation of the support column 4 causes the support rod 83 to rotate, causing the rotating block 84 to rotate the ring 86 synchronously, allowing the pointer 87 to rotate on the arc-shaped scale for angle measurement. When the laser emitter 7 is not needed, activating the drive device 3, through the pinion and gears, causes the support column 4 to rotate the laser emitter 7 and the ring 86 synchronously, rotating the protective frame 88. When the protective frame 88 rotates to the baffle plate 81, the baffle plate 81 blocks the front opening of the protective frame 88, preventing dust and other contaminants from entering.

[0023] Please see Figures 1-7Based on the above embodiments, in another embodiment of the present invention, the protective device is provided with an auxiliary device for dehumidification. The auxiliary device includes an arc-shaped rack 91, a threaded rod 92, a gear 93, an air box 94, a piston rod 96, a piston plate 917, an air inlet pipe 97, a threaded plate 95, an air outlet pipe 98, an L-shaped extrusion block 99, a T-shaped block 910, a connecting spring 912, a heat-conducting plate 913, a connecting rod 914, an extrusion spring 916, a semi-circular block 911, and a friction plate 915; A rack and pinion 91 is fixed to the outer wall of the baffle plate 81. A threaded rod 92 is rotatably mounted on the top of the protective frame 88. A gear 93 is fixed to the outer wall of the threaded rod 92. A threaded plate 95 is threadedly connected to the outer wall of the threaded rod 92. An air box 94 is fixed to the top of the protective frame 88. A piston rod 96 passes through the top of the air box 94 and is slidably connected at the point of penetration. A piston plate 917 is fixed to the bottom of the piston rod 96. An air intake pipe 97 is fixed to the bottom of the air box 94 and is connected to the protective frame 88. The air outlet pipe 98 is fixed to the side wall of the air box 94. One-way valves are fixed to the outer walls of the air inlet pipe 97 and the air outlet pipe 98. The one-way valve on the air inlet pipe 97 allows air to enter but not exit, while the one-way valve on the air outlet pipe 98 allows air to exit but not enter. The L-shaped extrusion block 99 is fixed to the side wall of the threaded plate 95. The T-shaped block 910 is slidably installed on the outer wall of the protective frame 88. One side of the connecting spring 912 is fixed to the side wall of the T-shaped block 910, and the other side of the connecting spring 912 is fixed to... The semicircular block 911 is fixed to the side wall of the T-shaped block 910, and the connecting rod 914 passes through the T-shaped block 910 and is slidably connected at the passage. The heat-conducting plate 913 is fixed to the side wall of the protective frame 88, and the friction plate 915 is fixed to the end of the connecting rod 914. One side of the compression spring 916 is fixed to the side wall of the T-shaped block 910, and the other side of the compression spring 916 is fixed to the protrusion at the end of the connecting rod 914. The outer wall of the heat-conducting plate 913 is in contact with the outer wall of the friction plate 915.

[0024] When the ring 86 drives the laser emitter 7 to rotate out of the shield 81, the gear 93 moves on the arc-shaped teeth 91, thereby driving the gear 93 to rotate. This causes the threaded plate 95 on the threaded rod 92 to move upward, which in turn drives the piston plate 917 to move upward. This allows the air intake pipe 97 to draw out the air from the protective frame 88, thus solving the problem that when the protective frame 88 is exposed, the air inside the protective frame 88 may contain floating dust, which may affect laser emission and lead to inaccurate detection data. Furthermore, when the threaded plate 95 moves, it can drive the L-shaped extrusion block 99 to move. Through the setting of multiple sets of semi-circular blocks 911, the friction plate 915 can move back and forth on the heat-conducting plate 913, thereby generating heat on the heat-conducting plate 913 and heating the inside of the protective frame 88, drying the moisture contained in the protective frame 88. This solves the problem that moisture in the protective frame 88 causes condensation at the emitter head, affecting laser emission.

[0025] By setting the compression spring 916, the compression spring 916 is in a stretched state, so that the friction plate 915 can always be in contact with the heat-conducting plate 913, preventing the friction plate 915 from wearing out after prolonged use, which would cause the friction plate 915 to stop contacting the heat-conducting plate 913.

[0026] The protective frame 88 is equipped with a processing device to improve the measurement accuracy of the laser emitter 7. The processing device includes an L-shaped block 101, a striking block 102, a pressing plate 107, a transmission rod 105, a long plate 106, an arc-shaped plate 108, an inclined plate 103, and a spring plate 104. The L-shaped block 101 is fixed to the side wall of the T-shaped block 910, the striking block 102 is fixed to the side wall of the L-shaped block 101, the pressing plate 107 is fixed to the bottom of the L-shaped block 101, and the inclined plate 104... 03 is slidably installed on the inner wall of the protective frame 88. One side of the spring plate 104 is fixed to the bottom of the inclined plate 103, and the bottom of the spring plate 104 is fixed to the inner wall of the protective frame 88. The transmission rod 105 is fixed to the bottom of the inclined plate 103 and passes through the bottom of the protective frame 88, and is slidably connected at the passage. The long plate 106 is fixed to the bottom of the transmission rod 105, and the arc plate 108 is fixed to the top of the long plate 106 and is arranged in a linear array.

[0027] By moving the L-shaped block 101 back and forth, the striking block 102 can strike the outer wall of the laser emitter 7 back and forth, thereby knocking off the dust and other debris attached to the emitting head of the laser emitter 7, preventing a large amount of impurities from adhering to the emitting head, which would block the emitted laser and cause inaccurate test results. Furthermore, by moving back and forth on the L-shaped block 101, the extrusion plate 107 can move back and forth on the arc surface of the arc plate 108, thereby driving the tilt plate 103 to shake back and forth, so that the dust falling from the launch head can be discharged from the protective frame 88 through the back and forth shaking of the tilt plate 103.

[0028] In this embodiment, during operation: when the motor is started, causing the small gear to drive the large gear to rotate, the laser emitter 7 can be rotated out of the arc-shaped plate 108 via the support column 4. This causes the gear 93 to move on the arc-shaped tooth 91, enabling the gear 93 to rotate forward. This allows the threaded sleeve on the threaded rod 92 to move upward, thereby causing the threaded plate 95 to drive the piston rod 96 to move upward. The piston rod 96 then drives the piston plate 917 to move upward, allowing the piston plate 917 to expel gas and floating dust from the protective frame 88. The gas is drawn into the gas box 94. When the support column 4 drives the laser emitter 7 to rotate towards the arc-shaped tooth 91, and the laser emitter 7 is rotated to the arc-shaped plate 108, the gear 93 will move on the arc-shaped tooth 91 and reverse, which will cause the threaded plate 95 to move downward. When the threaded plate 95 moves downward, it can drive the piston rod 96 to move downward. When the piston rod 96 moves downward, it can drive the piston plate 917 to move downward, so that the piston plate 917 can squeeze the gas in the gas box 94 out through the gas outlet pipe 98 to exhaust the gas.

[0029] Furthermore, when the threaded plate 95 moves upward or downward, the end of the L-shaped extrusion block 99 will press against the semi-circular block 911. When pressed against the arc surface of the semi-circular block 911, the semi-circular block 911 will be subjected to extrusion force, which will drive the T-shaped block 910 to move, causing the connecting spring 912 to compress. When the end of the L-shaped extrusion block 99 moves between the two sets of semi-circular blocks 911, the connecting spring 912 will be in a compressed state, which will drive the T-shaped block 910 to reset, thereby allowing the friction plate 915 to reset on the heat-conducting plate 913. By moving and rubbing back and forth on the heat-conducting plate 913, the heat-conducting plate 913 can be heated, and the heat can be transferred to the protective frame 88 to heat the moisture inside the protective frame 88, preventing moisture inside the protective frame 88 from causing condensation on the emitting head of the laser emitter 7. Furthermore, when the T-shaped block 910 moves back and forth, it can drive the L-shaped block 101 to move back and forth, causing the striking block 102 to strike the outer wall of the laser emitter 7 back and forth. This knocks off dust and other debris adhering to the emitting head of the laser emitter 7, which falls onto the inclined plate 103. When the L-shaped block 101 moves, it can drive the pressing plate 107 to move, causing the bottom of the pressing plate 107 to press against the arc surface of the curved plate 108. When the arc surface of the curved plate 108 is under pressure, it can move downwards, thereby driving the long plate 106 downwards. When the long plate 106 moves downwards, it can... When the transmission rod 105 moves downward, it can drive the inclined plate 103 to move downward, causing the spring plate 104 to be compressed. When the extrusion plate 107 moves between the two sets of arc plates 108, since the extrusion plate 107 does not extrude the arc plates 108, and the spring plate 104 is in a compressed state, the spring plate 104 can drive the inclined plate 103 to move upward to reset, and the transmission rod 105 can drive the long plate 106 to move upward to reset. This allows the inclined plate 103 to shake back and forth, causing the dust and other particles attached to the inclined plate 103 to be shaken off from inside the protective frame 88.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An angle detection device for construction, comprising a base (1), characterized in that: The base (1) has a pin (2) fixed at the bottom. The base (1) has a drive device (3) inside. The drive device (3) includes a motor, a small gear and a large gear. The motor is fixed on the inner wall of the base (1). The small gear is fixed on the output end of the motor. The outer wall of the large gear meshes with the outer wall of the small gear. The inner wall of the large gear has a support column (4). The bottom of the support column (4) is rotatably installed on the inner wall of the base (1). The top of the support column (4) has a fixed plate (5). The top of the fixed plate (5) has a laser emitter (7) detachably installed. The top of the base (1) has a protective device to protect the emitter head of the laser emitter (7). The protective device has an auxiliary device for dehumidification. The protective device includes a baffle plate (81), a circular groove (82), a support rod (83), a rotating block (84), a rotating wheel (85), a circular ring (86), a pointer (87), and a protective frame (88). The baffle plate (81) is fixed to the top of the base (1), the circular groove (82) is opened on the top of the base (1), the support rod (83) is fixed to the outer wall of the support column (4), the rotating block (84) is fixed to the end of the support rod (83), the rotating wheel (85) is rotatably installed at the bottom of the rotating block (84), the circular ring (86) is fixed to the top of the rotating block (84), and the protective frame (88) is fixed to the inner side of the circular ring (86).

2. The angle detection device for construction according to claim 1, characterized in that: The pointer (87) is fixed to the top of the ring (86), and an arc-shaped scale is fixed to the inner side of the shield (81).

3. The angle detection device for construction according to claim 1, characterized in that: The auxiliary device includes an arc-shaped rack (91), a threaded rod (92), a gear (93), an air box (94), a piston rod (96), a piston plate (917), an air inlet pipe (97), a threaded plate (95), an air outlet pipe (98), an L-shaped extrusion block (99), a T-shaped block (910), a connecting spring (912), a heat-conducting plate (913), a connecting rod (914), an extrusion spring (916), a semi-circular block (911), and a friction plate (915). The arc-shaped rack (91) is fixed to the outer wall of the baffle plate (81), the threaded rod (92) is rotatably mounted on the top of the protective frame (88), the gear (93) is fixed to the outer wall of the threaded rod (92), the threaded plate (95) is threadedly connected to the outer wall of the threaded rod (92), and the air box (94) is fixed to the top of the protective frame (88).

4. The angle detection device for construction according to claim 3, characterized in that: The piston rod (96) passes through the top of the air box (94) and is slidably connected at the point of penetration. The piston plate (917) is fixed to the bottom of the piston rod (96). The air inlet pipe (97) is fixed to the bottom of the air box (94). The air inlet pipe (97) is connected to the protective frame (88). The air outlet pipe (98) is fixed to the side wall of the air box (94). One-way valves are fixed to the outer walls of the air inlet pipe (97) and the air outlet pipe (98).

5. The angle detection device for construction according to claim 3, characterized in that: The L-shaped extrusion block (99) is fixed to the side wall of the threaded plate (95), the T-shaped block (910) is slidably installed on the outer wall of the protective frame (88), one side of the connecting spring (912) is fixed to the side wall of the T-shaped block (910), the other side of the connecting spring (912) is fixed to the inner side of the protective frame (88), the semi-circular block (911) is fixed to the side wall of the T-shaped block (910), and the connecting rod (914) passes through the T-shaped block (910) and is slidably connected at the point of penetration.

6. The angle detection device for construction according to claim 3, characterized in that: The heat-conducting plate (913) is fixed to the side wall of the protective frame (88), the friction plate (915) is fixed to the end of the connecting rod (914), one side of the compression spring (916) is fixed to the side wall of the T-block (910), and the other side of the compression spring (916) is fixed to the protrusion at the end of the connecting rod (914). The outer wall of the heat-conducting plate (913) is in contact with the outer wall of the friction plate (915).

7. The angle detection device for construction according to claim 1, characterized in that: The protective frame (88) is provided with a processing device to improve the measurement accuracy of the laser emitter (7). The processing device includes an L-shaped block (101), a striking block (102), a pressing plate (107), a transmission rod (105), a long plate (106), an arc plate (108), an inclined plate (103), and a spring plate (104). The L-shaped block (101) is fixed to the side wall of the T-shaped block (910), the striking block (102) is fixed to the side wall of the L-shaped block (101), and the pressing plate (107) is fixed to the bottom of the L-shaped block (101).

8. The angle detection device for construction according to claim 7, characterized in that: The inclined plate (103) is slidably installed on the inner wall of the protective frame (88). One side of the spring plate (104) is fixed to the bottom of the inclined plate (103). The bottom of the spring plate (104) is fixed to the inner wall of the protective frame (88). The transmission rod (105) is fixed to the bottom of the inclined plate (103) and passes through the bottom of the protective frame (88), and is slidably connected at the point of penetration. The long plate (106) is fixed to the bottom of the transmission rod (105). The arc plate (108) is fixed to the top of the long plate (106) and is arranged in a linear array.

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