A drill rod structure for road quality supervision sampling

Abstract

The present invention discloses a drill rod structure for road quality supervision sampling, which relates to the field of road detection technology, including a main pipe, one end of the main pipe is connected to a drill bit through a plurality of bolt fasteners 1, an external threaded pipe is slidably provided on the inner side of the main pipe, the other end of the main pipe is rotatably connected to an internal threaded operating ring, the other end of the main pipe is threadedly connected to a plurality of bolt fasteners 2, and a telescopic protective structure is provided on the outside of the main pipe. The drill rod structure for road quality supervision sampling described in the present invention can form an annular protective sleeve 1 with two semi-arc protective rings 1, and an annular protective sleeve 2 with two semi-arc protective rings 2. The annular protective sleeve 1 and the plurality of annular protective sleeves 2 can cooperate to protect the outside of the main pipe and the external threaded pipe, avoid direct contact between the main pipe and the inner wall of the concrete sampling borehole, reduce friction, and increase its service life.

Description

Technical Field

[0001] The invention relates to the technical field of road detection, in particular to a drill rod structure for road quality supervision sampling. Background Art

[0002] As an important part of transportation, roads will be used for a long time and are usually crushed by passing vehicles. There are strict standards for road quality. In order to avoid cutting corners and for the safety of transportation, it is usually necessary to sample and test the roads. Generally, a drill rod and a drill bit are used with power equipment to take core samples from the road.

[0003] However, the traditional drill rod structure inevitably has to contact with the concrete road over a large area. Due to the high density of concrete, the large-area contact will generate large friction, which will cause the drill rod to overheat and be easily damaged. Although water can be sprinkled to cool down while drilling, during the core sampling process, the drill rod is in full contact with the inner wall of the drilled hole, and water cannot enter the inner wall of the borehole immediately, resulting in poor fluidity, which affects the service life of the drill rod. At the same time, after the sampling is completed, since the concrete is solid, it is easy to fall from the inside of the drill rod during the removal process and return to the borehole, which will cause troubles to the sampling work. The concrete sample can no longer be limited to prevent it from falling at the end of the sampling. Therefore, the present invention proposes a drill rod structure for road quality supervision sampling. Summary of the invention

[0004] The main purpose of the present invention is to provide a drill rod structure for road quality monitoring sampling, which can effectively solve the technical problems raised in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A drill rod structure for road quality supervision sampling includes a main body, one end of the main body is connected to a drill bit through a plurality of bolt fasteners, an external threaded tube is slidably provided on the inner side of the main body, the other end of the main body is rotatably connected to an internal threaded operating ring, the other end of the main body is threadedly connected to a plurality of bolt fasteners, and a telescopic protective structure is provided on the outside of the main body.

[0007] As a preferred technical solution of the present invention, the telescopic protective structure includes a rotating ring, which is rotatably arranged on the outside of the main pipe body, and a slot plate 1 is fixedly arranged on both sides of the outside of the rotating ring, and the slot plate 1 is threadedly connected with two bolt fasteners 3, and two semi-arc protective rings 1 are movably arranged on the outside of the rotating ring, and two baffles 1 are fixedly installed on the inner side of the semi-arc protective ring 1, and the two baffles 1 are connected by bolt fasteners 4, and both ends of the semi-arc protective ring 1 are fixedly connected with a protrusion 1, and the top of the protrusion 1 is provided with two threaded holes, and the protrusion 1 and the slot plate 1 are adaptively matched.

[0008] As a preferred technical solution of the present invention, the telescopic protection structure also includes a telescopic protection component, which is arranged on the outside of the main pipe body, and the telescopic protection component includes a plurality of fixing rings, which are movably arranged on the outside of the main pipe body, and the fixing rings are fixedly provided with a slot plate 2 on both sides of the outside, and the slot plate 2 is threadedly connected with two bolt fasteners 5, and the outside of the fixing ring is movably provided with two semi-arc protection rings 2, and the inner side of the semi-arc protection ring 2 is fixedly connected with two baffles 2, and the baffles 2 are connected by bolt fasteners 6, and both ends of the semi-arc protection ring 2 are fixedly connected with a protrusion 2, and the top of the protrusion 2 is provided with two threaded holes, and the protrusion 2 and the slot plate 2 are adaptively matched, the rotating ring and the fixing ring close to the rotating ring are connected by four multi-stage telescopic rods, and two adjacent fixed rings are also connected by four multi-stage telescopic rods.

[0009] As a preferred technical solution of the present invention, a plurality of threaded holes are opened on the outside of the internal threaded operating ring, the thread of the second bolt fastener and the thread of the threaded hole of the internal threaded operating ring are adaptively matched, and the thread of the external threaded pipe and the thread of the internal threaded operating ring are adaptively matched.

[0010] As a preferred technical solution of the present invention, three notches are opened on the outside of the main body, and an opening and closing structure is arranged on the inner side of the notch. The opening and closing structure includes an opening and closing plate, and the opening and closing plate is rotatably arranged on the inner side of the notch. A clamping plate is fixedly connected to one side of the opening and closing plate, one end of the opening and closing plate is rotatably connected to a connecting plate one, one end of the connecting plate one is rotatably connected to a connecting plate two, one end of the connecting plate two is rotatably connected to a connecting rod, and one end of the connecting rod is fixedly connected to a rotating ring.

[0011] As a preferred technical solution of the present invention, two threaded holes are opened on the top of the rotating ring, the thread of the bolt fastener four is adaptively matched with the thread of the threaded hole of the rotating ring, the thread of the bolt fastener three is adaptively matched with the thread of the threaded hole of the protrusion one, and the two slot plates one, four bolt fasteners three, two semi-arc protective rings one, four baffles one, two bolt fasteners four and four protrusions one are installed to form a complete annular protective sleeve one.

[0012] As a preferred technical solution of the present invention, two threaded holes are opened on the top of the fixing ring, the thread of the bolt fastener six is ​​adaptively matched with the thread of the threaded hole of the fixing ring, the thread of the bolt fastener five is adaptively matched with the thread of the threaded hole of the protrusion two, and the two slot plates two, four bolt fasteners five, two semi-arc protective rings two, four baffles two, two bolt fasteners six and four protrusions two are installed to form a complete annular protective sleeve two.

[0013] As a preferred technical solution of the present invention, a limiting structure is arranged on the outside of the externally threaded tube, and the limiting structure includes a limiting plate, and the limiting plate is fixedly mounted on the outside of one end of the externally threaded tube, and a movable ring is rotatably arranged on one end of the externally threaded tube, and two adjusting plates are symmetrically fixedly mounted on the outside of the movable ring, and the adjusting plates are threadedly connected with a plurality of bolt fasteners seven, and two connecting plates three are symmetrically fixedly mounted on the outside of the movable ring.

[0014] As a preferred technical solution of the present invention, a plurality of threaded holes are provided on the top of the limiting plate, and the threads of the bolt fastener 7 and the threads of the threaded holes of the limiting plate are adaptively matched.

[0015] As a preferred technical solution of the present invention, a connector is fixedly provided at one end of the externally threaded pipe, and the connecting plate three is fixedly connected to a fixing ring near the connector.

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

[0017] 1. By setting up a telescopic protection structure, it is beneficial to form two semi-arc protection rings into an annular protection sleeve to protect the main pipe;

[0018] 2. By setting the telescopic protection assembly in conjunction with the telescopic protection structure, it is beneficial for the two semi-arc protection rings 2 to form an annular protection sleeve 2. The annular protection sleeve 1 and a plurality of annular protection sleeves 2 can cooperate to protect the outside of the main pipe body and the external threaded pipe, avoiding direct contact between the main pipe body and the inner wall of the concrete sampling borehole, reducing friction, and increasing its service life;

[0019] 3. By setting a telescopic protection structure and a telescopic protection assembly to cooperate with the main body and the external threaded pipe, the annular protective sleeve 2 can be adapted to the height position of the external threaded pipe for telescopic work. At the same time, the annular protective sleeve 1 and the annular protective sleeve 2 cooperate with the drill bit to improve the working stability of the drill rod structure inside the borehole;

[0020] 4. By setting the opening and closing structure and the telescopic protection structure together, it is convenient to open and close the opening and closing plate, so that the concrete samples inside the main body and the external threaded pipe are limited by the clamping plate, avoiding the problem of concrete samples falling when the drill rod structure leaves the borehole;

[0021] 5. By setting a limit structure in conjunction with the telescopic protection structure and the opening and closing structure, it is beneficial to adjust the position and limit the telescopic protection structure and the opening and closing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure of a drill rod structure for road quality monitoring sampling according to the present invention after the extension of the length;

[0023] Figure 2 It is a schematic diagram of the disassembled three-dimensional structure of a main pipe body, a drill bit and an internal thread operating ring of a drill rod structure for road quality supervision sampling of the present invention;

[0024] Figure 3 It is a cross-sectional three-dimensional structural schematic diagram of a main pipe body and an externally threaded pipe of a drill rod structure for road quality monitoring sampling according to the present invention;

[0025] Figure 4 It is a three-dimensional structural schematic diagram of an externally threaded pipe of a drill rod structure for road quality supervision sampling of the present invention;

[0026] Figure 5 It is a schematic diagram of the split three-dimensional structure of a rotating ring and two semi-arc-shaped protective rings of a drill rod structure for road quality supervision sampling according to the present invention;

[0027] Figure 6 It is a schematic diagram of the split three-dimensional structure of a fixing ring and two semi-arc-shaped protective rings 2 of a drill rod structure for road quality supervision sampling according to the present invention;

[0028] Figure 7 It is a three-dimensional structural schematic diagram of a multi-stage telescopic rod of a drill rod structure for road quality supervision sampling of the present invention;

[0029] Figure 8 It is a three-dimensional structural schematic diagram of a fixing ring of a drill rod structure for road quality monitoring sampling according to the present invention;

[0030] Fig. 9It is a schematic diagram of a three-dimensional structure of a rotary ring and a fixed ring of a drill rod structure for road quality monitoring sampling according to the present invention;

[0031] Fig.10 It is a three-dimensional structural schematic diagram of a rotating ring of a drill rod structure for road quality monitoring sampling according to the present invention;

[0032] Fig.11 It is a schematic diagram of the split three-dimensional structure of the externally threaded tube and the movable ring of a drill rod structure for road quality supervision sampling of the present invention;

[0033] Fig.12 This is an overall demonstration diagram of a drill rod structure for road quality monitoring sampling after its length is retracted;

[0034] Fig.13 This is an overall demonstration diagram of a drill rod structure for road quality monitoring sampling according to the present invention after the length is retracted from another perspective.

[0035] In the figure: 1. main body; 2. bolt fastener 1; 3. drill bit; 4. external threaded pipe; 5. connector; 6. internal threaded operating ring; 7. bolt fastener 2; 8. telescopic protection structure; 9. opening and closing structure; 10. limit structure; 11. rotating ring; 12. slot plate 1; 13. bolt fastener 3; 14. semi-arc protection ring 1; 15. baffle 1; 16. bolt fastener 4; 17. bump 1; 18. Fixed ring; 19. Slot plate 2; 20. Bolt fastener 5; 21. Semi-arc protection ring 2; 22. Baffle 2; 23. Bolt fastener 6; 24. Bump 2; 25. Multi-stage telescopic rod; 26. Opening and closing plate; 27. Card plate; 28. Connecting plate 1; 29. ​​Connecting plate 2; 30. Connecting rod; 31. Limiting plate; 32. Movable ring; 33. Adjusting plate; 34. Bolt fastener 7; 35. Connecting plate 3. 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 Figure 1-Figure 13 As shown, a drill rod structure for road quality supervision sampling includes a main body 1, one end of the main body 1 is connected to a drill bit 3 through a plurality of bolt fasteners 2, an external threaded tube 4 is slidably provided on the inner side of the main body 1, the other end of the main body 1 is rotatably connected to an internal threaded operating ring 6, the other end of the main body 1 is threadedly connected to a plurality of bolt fasteners 7, and a telescopic protective structure 8 is provided on the outside of the main body 1.

[0038] The telescopic protection structure 8 can protect the main pipe 1 and the external threaded pipe 4 .

[0039] In this embodiment, the telescopic protective structure 8 includes a rotating ring 11, which is rotatably arranged on the outside of the main body 1, and a slot plate 12 is fixedly arranged on both sides of the outside of the rotating ring 11. The slot plate 12 is threadedly connected with two bolt fasteners 3 13, and two semi-arc protective rings 14 are movably arranged on the outside of the rotating ring 11. Two baffles 15 are fixedly installed on the inner side of the semi-arc protective ring 14, and the two baffles 15 are connected by bolt fasteners 4 16. Both ends of the semi-arc protective ring 14 are fixedly connected with a protrusion 17, and the top of the protrusion 17 is provided with two threaded holes, and the protrusion 17 and the slot plate 12 are adaptively matched.

[0040] The two semi-arc-shaped protective rings 14 cooperate with the rotating ring 11, the bolt fasteners 3 13 and the bolt fasteners 4 16 to form a complete annular protective sleeve 1.

[0041] In this embodiment, the telescopic protection structure 8 also includes a telescopic protection component, which is arranged on the outside of the main pipe body 1. The telescopic protection component includes a plurality of fixed rings 18, which are movably arranged on the outside of the main pipe body 1. A slot plate 2 19 is fixedly arranged on both sides of the outside of the fixed ring 18, and the slot plate 2 19 is threadedly connected with two bolt fasteners 5 20. Two semi-arc protection rings 21 are movably arranged on the outside of the fixed ring 18, and the inner side of the semi-arc protection ring 21 is fixedly connected with two baffles 22, and the baffles 22 are connected by bolt fasteners 6 23, and both ends of the semi-arc protection ring 21 are fixedly connected with a protrusion 24, and the top of the protrusion 24 is provided with two threaded holes, and the protrusion 24 and the slot plate 2 19 are adaptively matched. The rotating ring 11 and the fixed ring 18 near the rotating ring 11 are connected by four multi-stage telescopic rods 25, and the two adjacent fixed rings 18 are also connected by four multi-stage telescopic rods 25.

[0042] The telescopic protection component can adapt to the height change of the external threaded tube 4 to perform telescopic work.

[0043] In this embodiment, a plurality of threaded holes are provided on the outside of the internal threaded operating ring 6, the threads of the bolt fastener 7 and the threaded holes of the internal threaded operating ring 6 are adaptively matched, and the threads of the external threaded tube 4 and the threaded holes of the internal threaded operating ring 6 are adaptively matched.

[0044] The height position of the externally threaded pipe 4 can be controlled by rotating the internally threaded operating ring 6 .

[0045] In this embodiment, three notches are opened on the outside of the main body 1, and an opening and closing structure 9 is arranged on the inner side of the notch. The opening and closing structure 9 includes an opening and closing plate 26, which is rotatably arranged on the inner side of the notch, and a clamping plate 27 is fixedly connected to one side of the opening and closing plate 26. One end of the opening and closing plate 26 is rotatably connected to a connecting plate 1 28, and one end of the connecting plate 1 28 is rotatably connected to a connecting plate 2 29, and one end of the connecting plate 29 is rotatably connected to a connecting rod 30, and one end of the connecting rod 30 is fixedly connected to the rotating ring 11.

[0046] The opening and closing structure 9 can limit the concrete samples inside the main body 1 and the external threaded pipe 4 to prevent them from falling when being taken out of the drill hole.

[0047] In this embodiment, two threaded holes are opened on the top of the rotating ring 11, the thread of the bolt fastener four 16 is adaptively matched with the thread of the threaded hole of the rotating ring 11, the thread of the bolt fastener three 13 is adaptively matched with the thread of the threaded hole of the protrusion 17, and two slot plates 12, four bolt fasteners three 13, two semi-arc protective rings 14, four baffles 15, two bolt fasteners four 16 and four protrusions 17 are installed to form a complete annular protective sleeve 1.

[0048] The annular protective sleeve 1 and the annular protective sleeve 2 can be used to protect the outside of the drill pipe structure.

[0049] In this embodiment, two threaded holes are opened on the top of the fixing ring 18, the thread of the bolt fastener six 23 is adaptively matched with the thread of the threaded hole of the fixing ring 18, the thread of the bolt fastener five 20 is adaptively matched with the thread of the threaded hole of the protrusion two 24, and two slot plates two 19, four bolt fasteners five 20, two semi-arc protective rings two 21, four baffles two 22, two bolt fasteners six 23 and four protrusions two 24 are installed to form a complete annular protective sleeve two.

[0050] The provision of the annular protective sleeve 1 and the annular protective sleeve 2 facilitates the replacement of the semi-arc protective ring 1 14 and the semi-arc protective ring 2 21 .

[0051] In this embodiment, a limiting structure 10 is provided on the outside of the external threaded tube 4, and the limiting structure 10 includes a limiting plate 31, which is fixedly installed on the outside of one end of the external threaded tube 4. A movable ring 32 is rotatably provided on one end of the external threaded tube 4, and two adjusting plates 33 are symmetrically fixedly installed on the outside of the movable ring 32. The adjusting plate 33 is threadedly connected with a plurality of bolt fasteners 7 34, and two connecting plates 35 are symmetrically fixedly installed on the outside of the movable ring 32.

[0052] The limiting structure 10 can limit the telescopic protection structure 8 and the opening and closing structure 9.

[0053] In this embodiment, a plurality of threaded holes are provided on the top of the limiting plate 31 , and the threads of the bolt fastener 34 and the threaded holes of the limiting plate 31 are adaptively matched.

[0054] The limiting plate 31 cooperates with the bolt fastener 34 to adjust and limit the position of the movable ring 32.

[0055] In this embodiment, a connector 5 is fixedly provided at one end of the external threaded tube 4 , and the connecting plate 3 35 is fixedly connected to a fixing ring 18 located near the connector 5 .

[0056] By connecting an external power device at the connector 5, the drill pipe structure can be put into operation as a whole.

[0057] It should be noted that the present invention is a drill rod structure for road quality supervision sampling. Before use, an external power device is connected to the connector 5, and then the drill rod structure is placed on the road where sampling is required, so that it can reach the working operating conditions. In addition, the drill rod structure is in a contracted state as a whole in the initial state, and the opening and closing structure 9 is in an open state, that is, the opening and closing plate 26 is opened toward the outside of the main body 1. At this time, the clamping plate 27 leaves the inside of the main body 1, so as to avoid the clamping plate 27 affecting the concrete sample from entering the inside of the main body 1 and the external threaded pipe 4 during sampling;

[0058] The power device is connected to the connector 5, and the power device acts on the drill rod structure as a whole, so that the drill bit 3 rotates toward the concrete road to perform sampling. Under the action of the drill bit 3, a circular hole is gradually drilled out of the concrete road. At this time, water can be poured into the hole to cool the drill rod structure as a whole. The semi-arc protective ring 14 and the semi-arc protective ring 2 21 play a protective role on the main body 1 and the external threaded pipe 4 to prevent them from contacting the inner wall of the borehole and reduce friction.

[0059] After the drill bit 3 drills through the concrete layer of the road, it continues to drill down to the soil layer and stops after drilling a certain thickness. At this time, the lowest end position of the concrete sample inside the main body 1 and the external threaded pipe 4 is higher than the position height of the clamping plate 27. At this time, the power equipment is stopped, and then the bolt fastener 7 34 at the corresponding position is removed, so that the movable ring 32 loses its restriction, and the movable ring 32 is rotated. The movable ring 32 acts on the telescopic protective structure 8 through the connecting plate 3 35 to rotate synchronously as a whole, thereby making the rotating ring 11 move synchronously with the connecting rod 30, and the connecting rod 30 acts on the connecting plate 1 28 through the connecting plate 2 29, and finally one end of the opening and closing plate 26 is moved. The clamping plate 27 rotates toward the inside of the main body 1 to perform the closing work. When the clamping plate 27 is completely located inside the main body 1, the bolt fastener 34 is installed to limit the position of the opening and closing plate 26, and then the drill rod structure is taken out to the predetermined position. During the process, the concrete sample presses the soil inside the drill rod structure until the bottom of the concrete sample fits with the top of the clamping plate 27. At this time, the bolt fastener 34 is removed again, and the clamping plate 27 is moved away from the inside of the main body 1 by rotating the movable ring 32. The concrete sample leaves the blocking limit of the clamping plate 27 and falls out of the inside of the main body 1 and the external threaded pipe 4 under the action of its own gravity, and the sampling work is completed.

[0060] When it is necessary to extend the use height of the external threaded tube 4, remove the bolt fastener 2 7, and then rotate the internal threaded operating ring 6 to make the external threaded tube 4 slide and extend. The external threaded tube 4 extends and brings the connecting plate 3 35 up synchronously. The connecting plate 3 35 makes the fixed ring 18 connected thereto move up synchronously. When the fixed ring 18 at the corresponding position rises and the corresponding multi-stage telescopic rod 25 extends to the maximum value, the fixed ring 18 of the upper layer will drive the adjacent fixed ring 18 of the next layer to continue to rise through the multi-stage telescopic rod 25, until the multi-stage telescopic rod 25 at the top of the rotating ring 11 extends to the maximum value and stops. At this time, the external threaded tube 4 also extends to the maximum height.

[0061] When it is necessary to replace the semi-arc protection ring 14 and the semi-arc protection ring 21, the bolt fasteners 3 13 and 4 16 at the corresponding positions are removed to make the semi-arc protection ring 14 free from restriction. After removing the damaged semi-arc protection ring 14 and replacing it with a new one, the two semi-arc protection rings 14 are inserted into the interior of the card slot plate 12 through the protrusions 17 at both ends. At this time, the rotating ring 11 is located between the two baffles 15, and the bolt fasteners 3 13 and 4 16 are installed to the corresponding positions. The bolt fasteners 5 20 are removed. and the bolt fastener six 23, the semi-arc protection ring two 21 can be freed from restriction. After removing the damaged semi-arc protection ring two 21 and replacing it with a new one, the two semi-arc protection rings two 21 are plugged into the inside of the card slot plate two 19 through the protrusions two 24 at both ends. At this time, the fixing ring 18 is located between the two baffles two 22, and the bolt fastener five 20 and the bolt fastener six 23 are installed to the corresponding positions. In addition, when the drill bit 3 needs to be replaced, the bolt fastener one 2 is also removed, and then the new drill bit 3 is replaced and the bolt fastener one 2 is installed.

[0062] Among the above-mentioned bolt fastener 1 2, bolt fastener 2 7, bolt fastener 3 13, bolt fastener 4 16, bolt fastener 5 20, bolt fastener 6 23, bolt fastener 7 34 are all composed of bolts and nuts.

Claims

1. A drill rod structure for road quality supervision sampling, comprising a main body (1), one end of the main body (1) is connected to a drill bit (3) via a plurality of bolt fasteners (2), an external threaded tube (4) is slidably provided on the inner side of the main body (1), the other end of the main body (1) is rotatably connected to an internal threaded operating ring (6), and the other end of the main body (1) is threadedly connected to a plurality of bolt fasteners (7), characterized in that: A telescopic protective structure (8) is provided on the outside of the main pipe (1); The telescopic protective structure (8) comprises a rotating ring (11), the rotating ring (11) being rotatably arranged on the outside of the main pipe body (1), a slot plate (12) being fixedly arranged on both sides of the outside of the rotating ring (11), the slot plate (12) being connected to two bolt fasteners (13) by threading, two semi-arc-shaped protective rings (14) being movably arranged on the outside of the rotating ring (11), two baffle plates (15) being fixedly installed on the inner side of the semi-arc-shaped protective ring (14), and the two baffle plates (15) being connected by bolt fasteners (16), and protrusions (17) being fixedly connected to both ends of the semi-arc-shaped protective ring (14), the top of the protrusion (17) being provided with two threaded holes, and the protrusion (17) and the slot plate (12) being adaptively matched; The telescopic protection structure (8) further comprises a telescopic protection assembly, the telescopic protection assembly being arranged outside the main pipe body (1), the telescopic protection assembly comprising a plurality of fixing rings (18), the fixing rings (18) being movably arranged outside the main pipe body (1), a second clamping plate (19) being fixedly arranged on both sides of the outside of the fixing ring (18), and the second clamping plate (19) being connected to two bolt fasteners (20) by threading, and two semi-arc-shaped second protective rings (21) being movably arranged outside the fixing ring (18), and the inner side of the semi-arc-shaped second protective ring (21) is provided with a plurality of fixing rings (18), and the inner side of the semi-arc-shaped second protective ring (21) is provided with a plurality of fixing rings (18). Two baffle plates (22) are fixedly connected to the side, and the baffle plates (22) are connected by bolt fasteners (23). Both ends of the semi-arc-shaped protective ring (21) are fixedly connected with protrusions (24). Two threaded holes are provided on the top of the protrusions (24). The protrusions (24) and the slot plate (19) are adaptively matched. The rotating ring (11) and the fixed ring (18) near the rotating ring (11) are connected by four multi-stage telescopic rods (25). Two adjacent fixed rings (18) are also connected by four multi-stage telescopic rods (25). The main pipe body (1) is provided with three notches on the outside, and an opening and closing structure (9) is provided inside the notches. The opening and closing structure (9) comprises an opening and closing plate (26), and the opening and closing plate (26) is rotatably provided inside the notches. A clamping plate (27) is fixedly connected to one side of the opening and closing plate (26). One end of the opening and closing plate (26) is rotatably connected to a connecting plate 1 (28), and one end of the connecting plate 1 (28) is rotatably connected to a connecting plate 2 (29). One end of the connecting plate 2 (29) is rotatably connected to a connecting rod (30), and one end of the connecting rod (30) is fixedly connected to a rotating ring (11); A limiting structure (10) is arranged outside the external threaded tube (4), and the limiting structure (10) comprises a limiting plate (31), and the limiting plate (31) is fixedly mounted outside one end of the external threaded tube (4). A movable ring (32) is rotatably arranged at one end of the external threaded tube (4), and two adjusting plates (33) are symmetrically fixedly mounted outside the movable ring (32), and the adjusting plates (33) are threadedly connected to a plurality of bolt fasteners (34), and two connecting plates (35) are symmetrically fixedly mounted outside the movable ring (32).

2. A drill rod structure for road quality monitoring sampling according to claim 1, characterized in that: The internal thread operating ring (6) is provided with a plurality of threaded holes on its exterior, the thread of the second bolt fastener (7) and the thread of the threaded hole of the internal thread operating ring (6) are adaptively matched, and the thread of the external thread pipe (4) and the thread of the internal thread operating ring (6) are adaptively matched.

3. The drill rod structure for road quality monitoring sampling according to claim 1 is characterized in that: The top of the rotating ring (11) is provided with two threaded holes, the thread of the bolt fastener four (16) is adaptively matched with the thread of the threaded hole of the rotating ring (11), the thread of the bolt fastener three (13) is adaptively matched with the thread of the threaded hole of the protrusion one (17), and the two slot plates one (12), the four bolt fasteners three (13), the two semi-arc protective rings one (14), the four baffles one (15), the two bolt fasteners four (16) and the four protrusions one (17) are installed to form a complete annular protective sleeve one.

4. The drill rod structure for road quality monitoring sampling according to claim 1 is characterized in that: The top of the fixing ring (18) is provided with two threaded holes, the thread of the bolt fastener six (23) is adaptively matched with the thread of the threaded hole of the fixing ring (18), the thread of the bolt fastener five (20) is adaptively matched with the thread of the threaded hole of the protrusion two (24), and the two slot plates two (19), four bolt fasteners five (20), two semi-arc-shaped protective rings two (21), four baffles two (22), two bolt fasteners six (23) and four protrusions two (24) are installed to form a complete annular protective sleeve two.

5. The drill rod structure for road quality monitoring sampling according to claim 1 is characterized in that: A plurality of threaded holes are formed on the top of the limiting plate (31), and the threads of the bolt fastener 7 (34) and the threads of the threaded holes of the limiting plate (31) are adaptively matched.

6. The drill rod structure for road quality monitoring sampling according to claim 1, characterized in that: A connector (5) is fixedly provided at one end of the externally threaded tube (4), and the third connecting plate (35) is fixedly connected to a fixing ring (18) located near the connecting head (5).

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