Portable field flatness detection equipment

Abstract

The utility model relates to the technical field of flatness detection equipment, and particularly discloses portable field flatness detection equipment, which is characterized in that a measuring instrument supporting table is arranged at the upper end part of a detection device base, and a fixed knot is arranged in the detection device base and the measuring instrument supporting table; the two mounting bases are fixedly connected to the ends, close to each other, of the detection device base and the measuring instrument supporting table respectively, the two round rod shafts are sleeved with the two mounting bases respectively, the two plug pins are arranged in the two round rod shafts respectively, the upper ends of the two plug pins are fixedly connected with handle circular rings respectively, the two mounting bases are internally provided with a set of inserting grooves respectively, and the two inserting grooves are fixedly connected with the handle circular rings respectively. After the device is used, a worker holds the surface of the circular ring of the handle and pulls out the plug pins, at the moment, the three round rod shafts are not limited, and the round rod shafts can be pulled out, so that the fixed knot, the detection device base and the measuring instrument supporting table can be disassembled in a split mode, the whole device can be disassembled into smaller units, and the device is convenient to carry and store.

Description

Technical Field

[0001] This utility model relates to the field of flatness testing equipment, and in particular to a portable site flatness testing equipment. Background Technology

[0002] Site leveling testing equipment is primarily used to accurately measure the flatness of a site, providing crucial data support for various construction projects, road paving, and plaza construction. It helps construction teams, regulatory departments, and related companies accurately grasp the site conditions, ensuring the smooth progress of subsequent projects. At construction sites, this equipment assists construction workers in timely adjustments to the site's flatness, preventing structural problems caused by unevenness. In road construction, it ensures road surface smoothness, improving driving safety and comfort. By measuring different locations on the site, it obtains flatness data such as elevation differences and slopes, providing a scientific basis for site leveling operations, thereby improving project quality and reducing later maintenance costs. Currently, the practical application of site leveling testing equipment typically requires the following technologies:

[0003] 1. High-precision measurement sensors can accurately measure the elevation changes of the site surface to obtain accurate flatness data;

[0004] 2. A stable and reliable signal transmission and processing system ensures that measurement data can be transmitted quickly and accurately and analyzed.

[0005] 3. The robust and durable shell structure adapts to different terrains and can work normally in various complex construction site environments;

[0006] 4. Flexible measurement mode switching function to meet the measurement needs of different site shapes, areas and flatness requirements.

[0007] Currently, various equipment and methods are used to achieve site flatness testing. Some methods utilize a level instrument paired with a leveling rod; operators observe the level instrument and leveling rod readings to measure the elevation difference at different points and determine site flatness. Others use laser scanning equipment, which uses a laser beam to scan the site surface, quickly acquiring large amounts of three-dimensional data for analyzing site flatness. Additionally, some total stations are also used for site flatness testing, measuring angles and distances to calculate the coordinates of each measurement point, thereby assessing site flatness.

[0008] However, the above method has a prominent hardware structure problem. Existing site leveling detection devices are usually set as a combination of a mounting platform and a telescopic pole. The telescopic function reduces the size of the device. However, existing devices usually lack the function of quick disassembly. When the site leveling detection device needs to be transported to different construction sites, the device cannot be quickly disassembled and the overall size is large. It occupies a lot of space in the transport vehicle, causing inconvenience in storage and operation. Utility Model Content

[0009] To address the shortcomings of existing technologies, this utility model provides a portable site leveling testing device. It solves the problem that existing site leveling testing devices are usually set up as a combination of a mounting platform and a telescopic rod. The telescopic function reduces the size of the device, but existing devices usually lack the function of quick disassembly. When it is necessary to transport the site leveling testing device to different construction sites, the device cannot be quickly disassembled, and the overall size is large, which occupies a lot of space in the transportation vehicle, causing inconvenience in storage and operation.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A portable site leveling testing device includes a testing device base, with a measuring instrument support platform at the upper end of the testing device base. Both the testing device base and the measuring instrument support platform are equipped with a telescopic mechanism for lifting and adjusting. Each telescopic mechanism includes a fixed section disposed inside the testing device base and the measuring instrument support platform. Both the testing device base and the measuring instrument support platform are also equipped with a disassembly mechanism for separation. Each disassembly mechanism includes two mounting seats, two round rod shafts, and two sets of pins. The two mounting seats are respectively fixedly connected to the adjacent ends of the testing device base and the measuring instrument support platform. The two round rod shafts are respectively sleeved inside the two mounting seats. The two sets of pins are respectively disposed inside the two round rod shafts, and a handle ring is fixedly connected to the upper end of each set of pins.

[0012] Preferably, both mounting bases have a set of slots inside.

[0013] Preferably, the fixed section has an internal sliding connection of an expansion joint.

[0014] Preferably, the fixed section has an arc-shaped abutment slidably connected inside, and an eccentric rod rotatably connected inside.

[0015] Preferably, the expansion joint has an arc-shaped groove inside.

[0016] Preferably, a laser measuring instrument is provided at the upper end of the measuring instrument support platform.

[0017] Preferably, the laser measuring instrument has a set of adjustment buttons inside, and the base of the detection device is internally threaded with a set of external screw rubber pad bases.

[0018] Preferably, the outer surface of the base of the detection device is provided with a scale, and a laser receiver is slidably connected to the outer surface of the scale.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. After the device is used, the operator holds the handle ring and pulls the pin outward. At this time, the three round rod shafts lose their limit and can be pulled outward. In this way, the fixed section, the detection device base, and the measuring instrument support can be disassembled separately, and the entire device can be disassembled into smaller units for easy carrying and storage.

[0021] 2. When it is necessary to change the placement angle of the measuring instrument support platform to adapt to leveling sites with different flatness, adjust the extension distance of the expansion joint. Hold and screw the eccentric rod. Since the eccentric rod is an eccentric connection, it loosens the contact with the arc-shaped abutment block when rotated, so that the arc-shaped abutment block is in a loose state. At this time, the expansion joint can be pulled out to adjust its extension distance. After the adjustment is completed, rotate the eccentric rod in the opposite direction so that it contacts the arc-shaped abutment block again. The arc-shaped abutment block fits against the surface of the arc groove, thereby limiting the expansion joint and fixing the angle of the measuring instrument support platform. Since the detection device base and the measuring instrument support platform are equipped with three fixed joints, and the extension distance can be adjusted separately, the placement angle of the measuring instrument support platform can be flexibly adjusted. Attached Figure Description

[0022] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is an exploded view of the base connection of the detection device of this utility model;

[0025] Figure 3 This is an exploded view of the pin connection of this utility model;

[0026] Figure 4 This is an exploded view of the eccentric rod connection of this utility model.

[0027] Legend: 11. Detection device base; 12. Measuring instrument support platform; 13. Fixed section; 14. Mounting base; 15. Round rod shaft; 16. Pin; 17. Handle ring; 18. Slot; 19. Expansion joint; 21. Arc-shaped stop block; 22. Eccentric rod; 23. Arc-shaped groove; 24. Laser measuring instrument; 25. Adjustment button; 26. External screw rubber pad base; 27. Scale; 28. Laser receiver. Detailed Implementation

[0028] This application provides a portable site leveling testing device that effectively solves the problem that existing site leveling testing devices are typically designed as a combination of a mounting platform and a telescopic rod. While the telescopic function reduces the device's size, these devices often lack the ability to be quickly disassembled. When transporting the site leveling testing device to different construction sites, the inability to quickly disassemble it results in a large overall size that occupies a significant amount of space in the transport vehicle, causing inconvenience in storage and operation. After use, the operator can grasp the handle's circular surface and pull the pin outwards. At this point, the three circular rod shafts lose their restraints and can be pulled outwards. In this way, the fixed section, the testing device base, and the measuring instrument support platform can be disassembled into smaller units, making the entire device easier to carry and store.

[0029] Example

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the technical solution in this application embodiment effectively solves the problem that existing site leveling testing devices are usually set as a combination of a mounting platform and a telescopic rod, which reduces the volume occupied by the device through the telescopic function. However, existing devices usually lack the function of quick disassembly and separation. When it is necessary to transport the site leveling testing device to different construction sites, the device cannot be quickly disassembled and the overall volume is large, which occupies a lot of space in the transportation vehicle, causing inconvenience in storage and operation. The overall idea is as follows: A portable site leveling testing device includes a testing device base 11, a measuring instrument support platform 12 is provided at the upper end of the testing device base 11, and both the testing device base 11 and the measuring instrument support platform 12 are provided with a telescopic mechanism for lifting and adjusting. The telescopic mechanism includes a fixed section 13, which is provided inside the testing device base 11 and the measuring instrument support platform 12. Both the testing device base 11 and the measuring instrument support platform 12 are provided with a disassembly mechanism for disassembly and separation. The mechanism includes two mounting bases 14, two round rod shafts 15, and two sets of pins 16. The two mounting bases 14 are fixedly connected to the near ends of the detection device base 11 and the measuring instrument support platform 12, respectively. The two round rod shafts 15 are respectively sleeved inside the two mounting bases 14. The two sets of pins 16 are respectively set inside the two round rod shafts 15. The upper ends of the two sets of pins 16 are fixedly connected to handle rings 17. Three fixing sections 13 are provided inside the detection device base 11 and the measuring instrument support platform 12. The three fixing sections 13 can be adjusted by telescoping to change the placement angle of the measuring instrument support platform 12 to adapt to leveling sites with different flatness. After the device is used, the operator holds the surface of the handle ring 17 and pulls the pins 16 outward. At this time, the three round rod shafts 15 lose their limit and can be pulled outward. At this time, the fixing sections 13 can be disassembled from the detection device base 11 and the measuring instrument support platform 12, and the device can be disassembled into smaller units for easier mechanical carrying and storage.

[0031] Both mounting bases 14 have a set of slots 18 inside, and two sets of pins 16 are respectively inserted into the two sets of slots 18. A telescopic joint 19 is slidably connected inside the fixed section 13. The fixed section 13 and the telescopic joint 19 are rotatably connected to the outer surfaces of the two round rod shafts 15. An arc-shaped abutment 21 is slidably connected inside the fixed section 13, and an eccentric rod 22 is rotatably connected inside the fixed section 13. The eccentric rod 22 and the arc-shaped abutment 21 are in contact. An arc-shaped groove 23 is opened inside the telescopic joint 19, and the arc-shaped groove 23 is adapted to the arc-shaped abutment 21. The fixed section 13... The telescopic joint 19 with internal sliding extension is used to adjust the extension distance to control the placement angle of the measuring instrument support platform 12. When it is necessary to loosen the telescopic joint 19 to adjust its distance, hold and turn the eccentric rod 22. The eccentric rod 22 is an eccentric connection, that is, the axis is not at the center of the circle. Rotating the eccentric rod 22 loosens the contact with the arc surface block 21. At this time, the arc surface block 21 is in a loose state. At this time, the telescopic joint 19 can be pulled out to adjust its extension distance. The arc surface block 21 fits against the surface of the arc groove 23 to limit the telescopic joint 19.

[0032] A laser measuring instrument 24 is mounted on the upper end of the measuring instrument support platform 12. Inside the laser measuring instrument 24 is a set of adjustment buttons 25. A set of external screw rubber pad bases 26 are threadedly connected to the internal structure of the detection device base 11. A scale 27 is mounted on the outer surface of the detection device base 11, and a laser receiver 28 is slidably connected to the outer surface of the scale 27. The laser measuring instrument 24 contains a detection element, namely a laser emitter, which emits a high-precision horizontal laser beam as a baseline for measuring the flatness of the site. Multiple scales 27 can be arranged equidistantly at different locations from the laser measuring instrument 24, such as two to three meters away. The scale 27 has graduations, which can be used to adjust the placement height of the laser receiver 28. The laser receiver 28 has a threaded connection to a clamping rod. Since the clamping rod is threadedly connected to the sliding mounting bracket inside the laser receiver 28, it will generate displacement and abut against the surface of the scale 27 when it rotates, thereby limiting the placement height of the laser receiver 28. The laser receiver 28 is used to receive the laser signal emitted by the laser emitter in the laser measuring instrument 24. Each receiver can accurately measure the position where the laser beam arrives and convert the signal into an electrical signal and transmit it to the data processing unit. The flatness of the site is judged by the multiple electrical signals received.

[0033] To address the problems existing in the prior art, this utility model provides a portable site leveling testing device. After the device is used, the operator holds the surface of the handle ring 17 and pulls the pin 16 outward. At this time, the three round rod shafts 15 lose their restraint and can be pulled outward. In this way, the fixing section 13, the testing device base 11, and the measuring instrument support platform 12 can be disassembled separately, and the entire device can be disassembled into smaller units for easy carrying and storage.

[0034] The testing device base 11 serves as the basic support for the equipment and provides an installation platform for other components. It is equipped with a lifting and telescopic mechanism and a disassembly mechanism. The external screw rubber pad base 26 is connected by a thread to enhance the stability of the device and prevent movement during measurement. It is connected and separated from the measuring instrument support 12 through the disassembly mechanism for easy assembly and disassembly. It works with the telescopic mechanism fixed section 13 to adjust the angle of the measuring instrument support 12. Together with the external screw rubber pad base 26, it ensures the stable placement of the equipment for accurate measurement.

[0035] Measuring instrument support platform 12: Places the laser measuring instrument 24 and provides stable support to ensure the accuracy of the laser beam baseline. The internal mechanism works with the detection device base 11 to achieve lifting adjustment and disassembly. Together with the detection device base 11, it forms the main frame of the equipment for easy handling and disassembly. It works with the telescopic mechanism to adjust its own angle to adapt to the site. Together with the laser measuring instrument 24, it ensures the realization of the measurement function.

[0036] Fixed section 13: This is the telescopic mechanism part. It provides a sliding track and support for the telescopic section 19 inside the base 11 of the detection device and the support platform 12 of the measuring instrument. It is equipped with an arc-shaped abutment block 21 and an eccentric rod 22 to indirectly limit the telescopic section 19. It rotates with the outer surface of the round rod shaft 15 of the telescopic section 19 and cooperates with the round rod shaft 15 to realize the connection and separation with the base and support platform. It forms a telescopic mechanism with the telescopic section 19 to adjust the angle. It cooperates with the arc-shaped abutment block 21 to lock and unlock the position of the telescopic section 19. It cooperates with the round rod shaft 15 to complete the disassembly and assembly of the equipment.

[0037] Mounting base 14: It is fixed to the near end of the detection device base 11 and the measuring instrument support 12 respectively, providing a sleeve position for the round rod shaft 15, connecting and positioning the round rod shaft 15, and inserting the pin 16 into the internal slot 18 to limit the round rod shaft 15 to ensure stable connection. It forms a disassembly mechanism with the round rod shaft 15 and the pin 16 to realize detachable connection, and cooperates with the detection device base 11, etc. to provide a stable installation foundation.

[0038] Round rod shaft 15: It is sleeved in the mounting base 14 to connect the detection device base 11 and the measuring instrument support platform 12. Fixed section 13 and telescopic section 19 are rotatably connected to its outer surface to provide support for the telescopic mechanism. It can be pulled out to separate the two when disassembling. It works with the mounting base 14 and pin 16 to complete the disassembly mechanism function, and works with fixed section 13 to ensure the operation of the telescopic mechanism.

[0039] Pin 16: Inside the round rod shaft 15, the upper end is connected to the handle ring 17 for easy operation. It is inserted into the mounting base 14 slot 18 to limit the round rod shaft 15 and ensure a firm connection. When disassembling, it is pulled out to unlock the round rod shaft 15 and achieve separation. It works with the handle ring 17 to control the connection and separation. Together with the mounting base 14, it forms a disassembly mechanism.

[0040] Handle ring 17: Attached to the upper end of pin 16, making it convenient for staff to hold and operate pin 16, and working with pin 16 to complete the disassembly mechanism operation to achieve connection and separation;

[0041] Slot 18: It is adapted to the pin 16 in the mounting base 14, and the pin 16 is inserted to position and limit the connection to ensure stable connection. It works with the pin 16 to realize the limiting function and complete the work of the splitting mechanism. It constitutes the splitting mechanism with the mounting base 14, etc.

[0042] Telescopic joint 19: It slides within the fixed joint 13, and controls the angle of the measuring instrument support platform 12 by telescopically changing the extension distance to adapt to the site. The inner arc groove 23 cooperates with the arc surface block 21 to lock and unlock the telescopic position. It forms a telescopic mechanism with the fixed joint 13 to adjust the angle. It works with the arc surface block 21 to lock and unlock the position. It cooperates with the fixed joint 13 to complete disassembly and assembly.

[0043] Arc-shaped abutment block 21: Slides within the fixed section 13 and fits against the eccentric rod 22 to limit the telescopic section 19. The rotation of the eccentric rod 22 controls its loosening or contact. It contacts the arc-shaped groove 23 to limit the telescopic section 19. It works with the eccentric rod 22 to lock and unlock the position of the telescopic section 19 to ensure angle stability. Together with the fixed section 13, it forms a telescopic mechanism.

[0044] Eccentric rod 22: It rotates within the fixed section 13. Due to its eccentric characteristics, it twists and turns to change the contact state with the arc surface block 21, controlling the extension and limitation of the telescopic section 19. It works in conjunction with the arc surface block 21 to precisely control the position of the telescopic section 19 to ensure angle stability and adjustability. Together with the fixed section 13, it forms a telescopic mechanism.

[0045] Arc groove 23: It is adapted to the arc surface block 21 inside the telescopic joint 19. When the arc surface block 21 abuts, it limits the telescopic joint 19 and guides its movement. It cooperates with the arc surface block 21 to lock and unlock the position to ensure angle stability. It forms part of the telescopic mechanism with the telescopic joint 19.

[0046] Laser measuring instrument 24: On the upper end of the measuring instrument support platform 12, there is a laser emitter that emits a horizontal laser beam to provide a measurement baseline. The internal adjustment button 25 can adjust the emission parameters and measurement mode to meet the requirements. It works with the measuring instrument support platform 12 to provide stable support, works with the laser receiver 28 to detect flatness, and works with the adjustment button 25 to meet different measurement requirements.

[0047] Adjustment button 25: Inside the laser measuring instrument 24, the operator operates and adjusts its parameters such as intensity, frequency, range and measurement mode, and works with the laser measuring instrument 24 to adapt to the measurement environment and improve accuracy, and works with the laser receiver 28 to complete the detection.

[0048] External screw rubber pad base 26: The screw is connected to the inner part of the detection device base 11. The rubber pad increases friction to prevent the equipment from sliding and shaking. The external screw facilitates connection, disassembly and fine adjustment of the level. It provides stable support in conjunction with the detection device base 11 and ensures accurate measurement in conjunction with the equipment.

[0049] Scale 27: Mounted on the outside of the detection device base 11, the surface scale provides a reference for the height adjustment of the laser receiver 28. Multiple scales 27 are arranged at equal intervals, and the height can be precisely adjusted in conjunction with the position change of the laser receiver 28. The accurate height adjustment in conjunction with the laser receiver 28 ensures the reception of the laser beam. The scale 27 in conjunction with the detection device base 11 provides a mounting and adjustment base for the laser receiver 28.

[0050] Laser receiver 28: It slides outside the scale 27 to receive the laser signal from the laser measuring instrument 24. It is connected to the internal threaded clamping rod. Rotating the clamping rod limits the height. It accurately measures the position of the laser beam, converts it into an electrical signal, and transmits it to the data processing unit to determine the flatness. It works with the scale 27 to adjust the height, works with the laser measuring instrument 24 to provide detection data, and works with the clamping rod to fix its own position.

[0051] Working principle:

[0052] The first step involves using the testing device base 11 as a basic support, with a measuring instrument support platform 12 mounted on its upper end. The two are connected by a disassembly mechanism, where two mounting seats 14 are fixed to the testing device base 11 and the measuring instrument support platform 12 respectively, close to each other at one end. A round rod shaft 15 is sleeved within the mounting seat 14, and a pin 16 passes through the round rod shaft 15 and inserts into the slot 18 of the mounting seat 14. The pin 16 can be operated via a handle ring 17 to achieve connection and separation. Both the testing device base 11 and the measuring instrument support platform 12 are equipped with telescopic mechanisms, consisting of a fixed section 13 and a telescopic section 19. The fixed section 13 and the telescopic section 19 are rotatably connected to the outer surface of the round rod shaft 15. The fixed section 13 contains an arc-shaped abutment 21 and an eccentric rod 22, while the telescopic section 19 has an arc-shaped groove 23 adapted to the arc-shaped abutment 21. A laser measuring instrument 24 is placed on the upper end of the measuring instrument support platform 12. An external threaded rubber pad base 26 connected internally to the testing device base 11 is used for stable placement. The equipment includes a measuring scale 27 mounted on the outer surface of the base 11 of the testing device. A laser receiver 28 is slidably connected to the measuring scale 27. The laser emitter inside the laser measuring instrument 24 emits a high-precision horizontal laser beam, which serves as a baseline for measuring the flatness of the site. Depending on the measurement requirements, multiple measuring scales 27 can be arranged equidistantly at different positions (e.g., two to three meters) from the laser measuring instrument 24. The placement height of the laser receiver 28 is adjusted by the scale on the surface of the measuring scale 27. The clamping rod connected to the internal thread of the laser receiver 28 is displaced when rotated due to its threaded connection with the internal sliding mounting bracket, thereby abutting against the surface of the measuring scale 27 and limiting the placement height of the laser receiver 28. The laser receiver 28 receives the laser signal emitted by the laser measuring instrument 24, accurately measures the position where the laser beam arrives, and converts the signal into an electrical signal, which is then transmitted to the data processing unit. Multiple laser receivers 28 collect signals at different positions, and the flatness of the site is determined by the multiple electrical signals received.

[0053] The second step involves adjusting the extension distance of the telescopic joint 19 when the placement angle of the measuring instrument support platform 12 needs to be changed to adapt to leveling sites with different flatness. This is done by holding and turning the eccentric rod 22. Since the eccentric rod 22 is eccentrically connected (its axis is not at the center of the circle), rotating it releases the contact with the arc-shaped abutment block 21, making the arc-shaped abutment block 21 loose. At this point, the telescopic joint 19 can be pulled outwards to adjust its extension distance. After adjustment, the eccentric rod 22 is rotated in the opposite direction to make it contact the arc-shaped abutment block 21 again. The arc-shaped abutment block 21 then fits against the surface of the arc-shaped groove 23, thus adjusting the extension distance of the telescopic joint 19. The angle of the measuring instrument support platform 12 is fixed by limiting and fixing it. Since the base 11 of the detection device and the measuring instrument support platform 12 are equipped with three fixed sections 13, and the extension distance can be adjusted separately, the placement angle of the measuring instrument support platform 12 can be flexibly adjusted. After the device is used, the operator holds the surface of the handle ring 17 and pulls the pin 16 outward. At this time, the three round rod shafts 15 lose their limit and can be pulled outward. In this way, the fixed section 13 can be disassembled from the base 11 of the detection device and the measuring instrument support platform 12, and the entire device can be disassembled into smaller units for easy carrying and storage.

[0054] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A portable site grading detection apparatus comprising a detection device base (11) provided with a surveyor support table (12) at an upper end thereof, characterized in that, The detection device base (11) and the measuring instrument support table (12) are internally provided with telescopic mechanisms for lifting adjustment, the telescopic mechanisms comprise fixed joints (13), the fixed joints (13) are arranged inside the detection device base (11) and the measuring instrument support table (12), the detection device base (11) and the measuring instrument support table (12) are internally provided with split mechanisms for split disassembly, the split mechanisms comprise two mounting seats (14), two round rod shafts (15) and two groups of bolts (16), two mounting seats (14) are fixedly connected to one end of the detection device base (11) and the measuring instrument support table (12) close to each other, two round rod shafts (15) are sleeved in the two mounting seats (14), and two groups of bolts (16) are arranged in the two round rod shafts (15). Wherein, the upper end of the two groups of bolts (16) is fixedly connected with a handle ring (17).

2. A portable site grading detection device as in claim 1, wherein, A group of insertion grooves (18) are formed in the two mounting seats (14); Wherein, the two groups of bolts (16) are respectively inserted into the two groups of insertion grooves (18).

3. A portable site grading detection device as in claim 2, wherein, The fixed joint (13) is internally and slidably connected with a telescopic joint (19); Wherein, the fixed joint (13) and the telescopic joint (19) are respectively rotatably connected to the outer surfaces of the two round rod shafts (15).

4. A portable site grading detection device as in claim 3, wherein, The fixed joint (13) is internally and slidably connected with an arc surface abutting block (21); Wherein, the fixed joint (13) is internally and rotatably connected with an eccentric rod (22).

5. A portable site grading detection device as claimed in claim 4, wherein, The eccentric rod (22) and the arc surface abutting block (21) are attached to each other; Wherein, the telescopic joint (19) is internally provided with an arc-shaped groove (23).

6. A portable site grading detection device as in claim 5, wherein, The arc-shaped groove (23) and the arc surface abutting block (21) are matched with each other; Wherein, the upper end of the measuring instrument support table (12) is provided with a laser measuring instrument (24).

7. A portable site levelling detection apparatus as claimed in claim 6, wherein, A group of adjustment buttons (25) are arranged inside the laser measuring instrument (24); Wherein, a group of outer screw rubber pad bases (26) are threadedly connected inside the detection device base (11).

8. A portable site grading detection device as in claim 7, wherein, The outer surface of the detection device base (11) is provided with a scale (27); Wherein, the outer surface of the scale (27) is slidably connected with a laser receiver (28).

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