CN113073523B

CN113073523B - Highway engineering is with survey micro-surfacing department thickness device that paves

Info

Publication number: CN113073523B
Application number: CN202110431449.3A
Authority: CN
Inventors: 孙海瑞; 夏京京
Original assignee: Guangdong Bay Construction Infrastructure Development Group Co ltd
Current assignee: Guangdong Bay Construction Infrastructure Development Group Co ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2023-04-21
Anticipated expiration: 2041-04-21
Also published as: CN113073523A

Abstract

The invention discloses a paving thickness measuring device for a micro-surfacing for highway engineering, and belongs to the technical field of road construction. The utility model provides a highway engineering is with survey micro-surfacing department thickness device that paves, the on-line screen storage device comprises a base, the backup pad top surface left side has set firmly the stopper, vertical groove has been seted up for the position of stopper tip to the test lever left wall, the cavity has been seted up at the test lever bottom surface middle part, the cavity right wall has inlayed the glass board, a plurality of inclined slots have been seted up to the cavity inner wall to linear equidistant, the clearance mouth has been coaxially seted up at test lever top surface middle part, clearance mouth inside is equipped with the closing cap, two integrated circuit boards have been seted up to bilateral symmetry around the closing cap, board inside outside end is equipped with the cardboard, compression spring C has been set firmly between cardboard inside wall and the board inside wall, the draw-in groove has been seted up for the position of cardboard outside end to clearance mouth inner wall. The invention can insert the test rod into the micro-meter more quickly, saves time and labor, and simultaneously can ensure that the thickness measurement work has stronger rigor and strong practicability.

Description

Highway engineering is with survey micro-surfacing department thickness device that paves

Technical Field

The invention relates to the technical field of road construction, in particular to a paving thickness measuring device for a micro-surfacing for highway engineering.

Background

The micro-surfacing is a thin layer with high anti-slip and durability which is paved on the original road surface by adopting special mechanical equipment to mix polymer modified asphalt, coarse and fine aggregates, filler, water, additives and the like according to the designed proportion, and the traffic is opened quickly.

Through searching, the patent with the publication number of CN212294268U discloses a device for measuring the paving thickness at the micro-meter position for highway engineering, and the device not only can clean the test needle before measuring is completed or the next measuring point is carried out, but also can ensure that the measurement of the test needle is not affected when the paving thickness at the micro-meter position is uneven.

The mode of inserting the road surface in the current device CN211772667U is difficult to insert the test needle into firm road surface, the operation can be very time-consuming and laborious, and the staff both need laborious rotation top board in the in-process of inserting it into the road surface, still must be distracted with this device suppression, otherwise just can make this device perk because the reaction force on ground, moreover, the device can't judge in the use whether the position of test needle tip enters into the soil of micro-surfacing department below, so can cause the survey result to produce the deviation, in view of this, we propose a highway engineering with survey micro-surfacing department paving thickness device.

Disclosure of Invention

1. Technical problem to be solved

The invention aims to provide a paving thickness measuring device for a micro-surfacing for highway engineering, which aims to solve the problems in the background technology.

2. Technical proposal

The utility model provides a highway engineering is with survey micro-surfacing department thickness device that paves, which comprises a base, the base top is equipped with the backup pad, be symmetrical structure between outer wall and the base top front and back both ends around the backup pad has set firmly two extension boards, base both sides symmetry has set firmly two sideboards, the foot groove has been seted up to sideboard top surface, foot groove upper portion is equipped with the clamp plate, the clamp plate bottom surface is linear equidistant symmetry and has set firmly a plurality of slide posts, the post groove has been seted up for the position of slide post to foot groove bottom surface, the outside cover of slide post has compression spring A, the foot groove bottom surface is linear equidistant a plurality of through grooves of having seted up, the through groove lower extreme has been equipped with the slipmat, compression spring B has been set firmly between slipmat top surface and the clamp plate bottom surface, backup pad top surface middle part has the screw thread seat, screw thread seat outer wall middle part cover has the swivel, the backup pad middle part has seted up the annular groove for the position of screw thread seat and swivel, the backup pad top surface has set firmly servo motor for the position of screw seat rear side, servo motor output end runs through backup pad top surface to the lower part and coaxial fixed connection, the position of the backup pad bottom surface has set firmly the post, the test rod is set firmly for the screw thread seat inner wall, the inside of bit holder has set firmly corresponding to the screw thread seat, the inside has set firmly the bit holder, the bit holder has set firmly the bit holder has the inside to the same set of screw thread seat, the bit holder has the same spacing to the inside to the bit holder, the bit holder has the inside to the bit holder, extension rod has been inserted in foundation beam bottom surface middle part, the stopper has been set firmly in backup pad top surface left side, vertical groove has been seted up for the position of stopper tip to the test rod left wall, the cavity has been seted up at test rod bottom surface middle part, the glass board has been inlayed to the cavity right wall, the cavity inner wall is a plurality of inclined slots of linear equidistant having seted up, the clearance mouth has been coaxially seted up at test rod top surface middle part, clearance mouth inside has the closing cap, two integrated circuit boards have been seted up to bilateral symmetry around the closing cap, board inside outside end is equipped with the cardboard, compression spring C has been set firmly between cardboard inside wall and the board inside wall, the draw-in groove has been seted up for the position of cardboard outside end to clearance mouth inner wall.

The support plate is of an inclined structure with a high inner side end and a low outer side end, the foot groove and the pressing plate are of structures similar to the shape of human soles, the outer wall of the pressing plate is in sliding contact with the inner wall of the foot groove, the sliding column is in sliding fit with the column groove, and the anti-slip pad is in sliding fit with the penetrating groove.

The screw thread seat and the swivel are in running fit with the annular groove, the lower end of the screw thread seat penetrates through the annular groove to extend to the lower portion, and the gear is meshed with the tooth column.

The utility model discloses a drill bit, including the drill bit, the screw thread seat, the drill bit is annular structure, spacing ring and spacing groove normal running fit, the tool bit is tip decurrent triangle-shaped structure, extension rod lower extreme is fixed with the drill bit top surface connection, basic pole and extension rod are arc structure, extension rod and the inside sliding fit of basic pole.

Preferably, the limiting block is of an L-shaped structure, the end part of the limiting block is in sliding fit with the vertical groove, and the chute is of an inclined structure with a high inner side end and a low outer side end.

Preferably, the sealing cover and the cleaning opening are of T-shaped structures, the sealing cover is in plug-in fit with the cleaning opening, the plate groove and the clamping plate are of L-shaped structures, and the outer side end of the clamping plate penetrates through the opening end of the plate groove to extend to the outside and is in clamping fit with the clamping groove.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

1. the invention is provided with the drill bit, a worker can place the device at an optional position on the surface of the micro meter to be measured, then the servo motor can be used for driving the gear to drive the threaded seat to rotate through the tooth post, the base rods and the extension rods on two sides can drive the drill bit to rotate in the rotating process of the threaded seat, and then a plurality of cutter heads on the bottom surface of the drill bit can do circular motion, so that the device can break the surface of the micro meter more easily and go deep in the drill bit, meanwhile, as the external threads are connected with the threads of the threaded seat, the outer wall of the test rod is also provided with a vertical groove in sliding fit with the limiting block, the test rod can do vertical downward linear motion along the inside of the threaded seat to drill towards the deep position of the micro meter, the test rod can be inserted into the micro meter more quickly by using the structural design, the thickness data of the micro meter can be obtained more quickly while saving time and labor, and the practicability is strong.

2. The invention is provided with two side plates, before a staff breaks the micro-meter to measure the thickness, the soles can be prevented from being arranged on the pressing plates along the positions of the two foot grooves, then the sliding column can be pressed into the column groove by the pressing plate under the weight of the staff, the compression spring B is pressed short, the resilience force generated by the shrinkage of the compression spring B can only be released downwards due to the pressing of the pressing plate by the staff, the bottom surface of the anti-slip pad can be attached to the ground, and thus the anti-slip pad can be more tightly attached to the ground under the top power of the compression spring B.

3. According to the invention, the cavity is formed in the test rod, the test rod and the thread seat do not synchronously rotate through the thread seat and the limiting block, so that the direction of the glass plate is always faced to the right side, a worker can conveniently observe the condition in the cavity through the glass plate, the worker can reverse the servo motor to lift the drill rod after driving the test rod to drill into a deeper length by using the servo motor, the chute formed in the inner wall of the cavity can bring out soil at the lower part of the micro-meter, the worker can calculate the thickness of the micro-meter by only observing the position of the chute with the soil and comparing with the relative position in the cavity where the surface of the micro-meter is observed before, and the thickness measuring work of the micro-meter can not deviate due to the fact that the position where the test rod drills in reaches the soil by using the structure, so that the thickness measuring work has stronger rigor and the measuring result is more accurate.

4. The invention is provided with the cleaning opening and the sealing cover, after the thickness test of the micro-meter at one place is finished, a worker can pinch the upper ends of the two clamping plates along the top surface of the sealing cover, so that the clamping plates are not clamped with the clamping grooves any more, the sealing cover which is not limited can be pulled out of the cleaning opening, and then the worker can fill water into the interior of the cavity through the cleaning opening to clean the residual soil in the chute on the inner wall of the cavity, thereby avoiding influencing the next measuring work.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of a sideboard according to the present invention;

FIG. 3 is a schematic diagram of the structure of the test lever and the support plate according to the present invention;

FIG. 4 is a schematic diagram showing an exploded structure of a test stick according to the present invention;

FIG. 5 is a schematic cross-sectional view of a test stick according to the present invention;

fig. 6 is a schematic cross-sectional view of the closure of the present invention.

The reference numerals in the figures illustrate: 1. a base; 2. a support plate; 3. a support plate; 4. a side plate; 5. a foot well; 6. a pressing plate; 7. a spool; 8. a column groove; 9. compressing the spring A; 10. a through groove; 11. an anti-slip pad; 12. a compression spring B; 13. a screw seat; 14. a swivel; 15. a ring groove; 16. a servo motor; 17. a gear; 18. tooth columns; 19. a test rod; 20. an external thread; 21. positioning holes; 22. a limiting ring; 23. a drill bit; 24. a limit groove; 25. a cutter head; 26. a base rod; 27. an extension rod; 28. a limiting block; 29. a vertical groove; 30. a cavity; 31. a glass plate; 32. a chute; 33. cleaning the mouth; 34. a cover; 35. a plate groove; 36. a clamping plate; 37. a compression spring C; 38. a clamping groove.

Detailed Description

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-6, the present invention provides a technical solution:

a paving thickness measuring device for highway engineering comprises a base 1, a supporting plate 2 is arranged above the base 1, two supporting plates 3 are fixedly arranged between the front and rear outer walls of the supporting plate 2 and the front and rear ends of the top surface of the base 1 in a symmetrical structure, two side plates 4 are symmetrically and fixedly arranged on two sides of the base 1, a foot groove 5 is arranged on the top surface of the side plates 4, a pressing plate 6 is arranged on the upper part of the foot groove 5, a plurality of slide posts 7 are symmetrically and linearly and uniformly arranged on the bottom surface of the pressing plate 6, a post groove 8 is arranged on the bottom surface of the foot groove 5 at a position corresponding to the slide posts 7, a compression spring A9 is sleeved outside the slide posts 7, a plurality of penetrating grooves 10 are linearly and uniformly arranged on the bottom surface of the foot groove 5, a non-slip pad 11 is arranged at the lower end of the penetrating groove 10, a compression spring B12 is fixedly arranged between the top surface of the non-slip pad 11 and the bottom surface of the pressing plate 6, a thread seat 13 is arranged in the middle of the top surface of the supporting plate 2, a rotating ring 14 is sleeved on the middle part of the outer wall of the thread seat 13, the middle part of the supporting plate 2 is provided with a ring groove 15 relative to the positions of the thread seat 13 and the swivel 14, the top surface of the supporting plate 2 is fixedly provided with a servo motor 16 relative to the position of the rear side of the thread seat 13, the output end of the servo motor 16 penetrates through the top surface of the supporting plate 2 to extend to the lower part and is coaxially and fixedly connected with a gear 17, the lower end of the outer wall of the thread seat 13 is fixedly provided with a plurality of tooth posts 18 at equal intervals relative to the position of the gear 17 in an annular shape, the inside of the thread seat 13 is inserted with a test rod 19, the circumference outer wall of the test rod 19 is provided with an external thread 20, the top surface of the base 1 is provided with a positioning hole 21 relative to the position of the test rod 19, the test rod 19 sequentially penetrates through the inside of the thread seat 13 and the positioning hole 21 to extend to the lower part and is sleeved with a limiting ring 22, the lower end of the outside of the test rod 19 is sleeved with a drill bit 23, the inner wall of the drill bit 23 is provided with a limiting groove 24 relative to the position of the limiting ring 22, the bottom surface of the drill bit 23 is fixedly provided with a plurality of cutter heads 25 at equal intervals in an annular shape, two basic rods 26 have been set firmly to screw seat 13 bottom surface bilateral symmetry, the extension rod 27 has been inserted in basic rod 26 bottom surface middle part, stopper 28 has been set firmly in the left side of backup pad 2 top surface, vertical groove 29 has been seted up for the position of stopper 28 tip to the left wall of test rod 19, cavity 30 has been seted up at test rod 19 bottom surface middle part, cavity 30 right wall has inlayed glass board 31, a plurality of chute 32 have been seted up to cavity 30 inner wall be linear equidistant, clearance mouth 33 has been coaxially seted up at test rod 19 top surface middle part, clearance mouth 33 inside is equipped with closing cap 34, two board grooves 35 have been seted up to the bilateral symmetry around the closing cap 34, board groove 35 inside outside end is equipped with cardboard 36, compression spring C37 has been set firmly between cardboard 36 inside wall and the board groove 35 inside wall, the draw-in groove 38 has been seted up for the position of cardboard 36 outside end to clearance mouth 33 inner wall.

Specifically, the supporting plate 3 is of an inclined structure with a high inner side end and a low outer side end, the foot grooves 5 and the pressing plates 6 are of structures similar to the shape of human soles, the outer walls of the pressing plates 6 are in sliding contact with the inner walls of the foot grooves 5, the sliding columns 7 are in sliding fit with the column grooves 8, the anti-slip pads 11 are in sliding fit with the through grooves 10, a worker can place the device at an optional position on the surface of a micro meter to be measured, before the worker breaks the micro meter to measure the thickness by using the device, the soles can be prevented from being arranged on the pressing plates 6 along the positions of the two foot grooves 5, then the sliding columns 7 can be pressed into the column grooves 8 by the pressing lower pressing plates 6 of the weight of the worker, the compression springs B12 can only be released downwards due to the compression of the compression springs B12, the bottom surfaces of the anti-slip pads 11 are also attached to the ground, the anti-slip pads 11 can be more tightly pressed and the ground closely, and the anti-slip pads 11 can be prevented from being attached to the ground due to the anti-slip pads 11 due to the fact that the ground are not to the tilting force of the ground by the compression of the compression springs B12.

Further, the screw seat 13 and the swivel 14 are both in running fit with the ring groove 15, the lower end of the screw seat 13 extends to the lower portion through the ring groove 15, the gear 17 is meshed with the tooth column 18, and a worker can drive the gear 17 by using the servo motor 16 and then drive the screw seat 13 to rotate through the tooth column 18.

Further, the external thread 20 is in threaded connection with the thread seat 13, the drill bit 23 is of a circular ring structure, the limiting ring 22 is in running fit with the limiting groove 24, the cutter bit 25 is of a triangular structure with a pointed end downwards, the lower end of the extending rod 27 is fixedly connected with the top surface of the drill bit 23, the base rod 26 and the extending rod 27 are of arc structures, the extending rod 27 is in sliding fit with the inside of the base rod 26, the drill bit 23 is driven to rotate through the base rods 26 and the extending rod 27 on two sides in the rotating process of the thread seat 13, and then the cutter bits 25 on the bottom surface of the drill bit 23 are also in circular motion, so that the surface of the micro-meter can be broken easily to penetrate into the surface.

Still further, stopper 28 is L type structure, stopper 28 tip and vertical groove 29 sliding fit, chute 32 is the slope structure that the inboard end is high outside end is low, because external screw thread 20 and screw thread seat 13's threaded connection, and test lever 19 outer wall still has seted up with stopper 28 sliding fit's vertical groove 29, test lever 19 under such structure can be along the inside vertical rectilinear motion of screw thread seat 13 and push away drill bit 23 to the deep position of micro-meter department, utilize this structural design can be more swift insert test lever 19 into micro-meter department, thickness data of micro-meter department in this place also can be more rapid obtained while labour saving and time saving, because external screw thread 20 and screw thread seat 13's threaded connection, and test lever 19 outer wall still has seted up with stopper 28 sliding fit's vertical groove 29, test lever 19 under such structure can be along the inside vertical rectilinear motion of screw thread seat 13 and push away drill bit 23 to the deep position of micro-meter department, utilize this structural design can be more swift insert test lever 19 into micro-meter department, thickness data that this place can also be more rapid while obtaining this micro-meter department.

It should be noted that, the sealing cover 34 and the cleaning opening 33 are both in T-shaped structures, the sealing cover 34 is in plug-in fit with the cleaning opening 33, the board groove 35 and the clamping board 36 are both in L-shaped structures, the outer side end of the clamping board 36 penetrates through the opening end of the board groove 35 to extend to the outside and is in clamping fit with the clamping groove 38, when the screw seat 13 rotates, a worker can pinch the upper ends of the two clamping boards 36 along the top surface of the sealing cover 34 after finishing thickness testing of the micro meter at one place, so that the clamping board 36 is not clamped with the clamping groove 38 any more, the sealing cover 34 without limitation can be pulled out of the cleaning opening 33, and then the worker can fill water into the cavity 30 through the cleaning opening 33 to clean the residual soil in the chute 32 of the inner wall of the cavity 30, thereby avoiding influencing the next measurement work.

Working principle: the staff can place the device at the random position of the surface of the micro-meter to be measured, before the staff uses the device to break the micro-meter to measure the thickness, the soles can be placed on the pressing plates 6 along the positions of the two foot grooves 5, then the sliding column 7 can be pressed into the column groove 8 by the pressing lower pressing plate 6 of the weight of the staff, the compression spring B12 is pressed short, the resilience force generated by the shrinkage of the compression spring B12 can only be released downwards due to the pressing of the pressing plate 6 by the staff, the bottom surface of the anti-skid pad 11 can be attached to the ground, thus the anti-skid pad 11 can be more tightly attached to the ground under the top power of the compression spring B12, the structure can ensure that the device can not be tilted due to the reaction force of the ground under the pressing of the weight of the staff, and the anti-skid pad 11 can also be prevented from sideslip, the test rod 19 can be inserted into the micro meter to measure more conveniently, the operation of the device is more stable and reliable, the operation of staff is more convenient, after the fixing is finished, the staff can drive the gear 17 by the servo motor 16 and then drive the screw seat 13 to rotate by the tooth column 18, in the rotating process of the screw seat 13, the drill bit 23 is driven to rotate by the base rods 26 and the extension rods 27 at two sides, the plurality of cutter heads 25 at the bottom surface of the drill bit 23 are further circularly moved, so that the device can break the surface of the micro meter more easily to go deep, meanwhile, due to the threaded connection of the external threads 20 and the screw seat 13, the outer wall of the test rod 19 is further provided with the vertical groove 29 which is in sliding fit with the limiting block 28, the test rod 19 can vertically and downwards linearly move along the inside of the screw seat 13 to drill towards the deep position of the micro meter along the drill bit 23, by utilizing the structural design, the test rod 19 can be more quickly inserted into the micro meter, the thickness data of the micro meter can be more quickly obtained while time and labor are saved, the practicability is strong, because the test rod 19 and the screw seat 13 do not synchronously rotate under the limit of the screw seat 13 and the limiting block 28, the direction of the glass plate 31 can be always right, a worker can more conveniently observe the condition inside the cavity 30 through the glass plate 31, the worker can make the servo motor 16 reversely rotate to lift the drill rod after driving the test rod 19 to drill into a deeper length by utilizing the servo motor 16, the chute 32 arranged on the inner wall of the cavity 30 can bring out soil at the lower part of the micro meter, the staff only need observe the chute 32 position that leaves soil and then compare with the inside relative position of cavity 30 that the micro-surfacing surface was located that observes before can calculate micro-surfacing thickness, utilize this kind of structure can make micro-surfacing thickness measurement work can not reach the soil and produce the deviation because of the position that test rod 19 was bored in, make thickness measurement work have stronger rigor, make the measuring result more accurate meticulous, the staff is after finishing to micro-surfacing thickness test in a position, can pinch the upper end of two cardboard 36 along the closing cap 34 top surface and make cardboard 36 no longer with draw-in groove 38 joint, lose confined closing cap 34 alright be pulled out clearance mouth 33, then the staff can clean the residual soil in the inner wall 32 of cavity 30 through the inside water-filling of clearance mouth 33, avoid influencing the measuring work next time.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a highway engineering is with survey micro-surfacing department thickness device that paves, includes base (1), its characterized in that: the utility model discloses a foot pad, including base (1) and base (1), base (1) top is equipped with backup pad (2), be symmetrical structure between outer wall and base (1) top front and back both ends around backup pad (2) has set firmly two extension boards (3), base (1) both sides symmetry has set firmly two sideboards (4), foot groove (5) have been seted up to sideboard (4) top surface, foot groove (5) upper portion is equipped with clamp plate (6), clamp plate (6) bottom surface is linear equidistant symmetry and sets firmly a plurality of slide posts (7), post groove (8) have been seted up for the position of slide post (7) in foot groove (5) bottom surface, slide post (7) outside cover is equipped with compression spring A (9), foot groove (5) bottom surface is linear equidistant and has set up a plurality of through grooves (10), through groove (10) lower extreme is equipped with slipmat (11), foot groove (5) and clamp plate (6) are human foot-like foot shape structure for the slope structure of inboard end height outside end is low, clamp plate (6) outer wall (6) has set firmly post (8) with compression spring A (10) with slide pad (11), the middle part of the top surface of the supporting plate (2) is provided with a thread seat (13), the middle part of the outer wall of the thread seat (13) is sleeved with a swivel (14), the middle part of the supporting plate (2) is provided with a ring groove (15) relative to the positions of the thread seat (13) and the swivel (14), the position of the top surface of the supporting plate (2) relative to the rear side of the thread seat (13) is fixedly provided with a servo motor (16), the output end of the servo motor (16) penetrates through the top surface of the supporting plate (2) to extend to the lower part and is coaxially and fixedly connected with a gear (17), the lower end of the outer wall of the thread seat (13) is fixedly provided with a plurality of tooth columns (18) at equal intervals in an annular shape relative to the position of the gear (17), the thread seat (13) and the swivel (14) are in running fit with the ring groove (15), the lower end of the thread seat (13) penetrates through the ring groove (15) to extend to the lower part, and the gear (17) is in meshed connection with the tooth columns (18).

The utility model discloses a test device, including screw seat (13) and glass cavity (30), screw seat (13) are equipped with inside test rod (19), external screw thread (20) have been seted up to test rod (19) circumference outer wall, locating hole (21) have been seted up for the position of test rod (19) top surface, test rod (19) pass inside screw seat (13) in proper order and locating hole (21) extend to the lower part and cup joint spacing ring (22), test rod (19) outside lower extreme cover is equipped with drill bit (23), spacing groove (24) have been seted up for the position of spacing ring (22) in drill bit (23) inner wall, drill bit (23) bottom surface are annular equidistant and have set firmly a plurality of tool bits (25) tool bit (25) are tip decurrent triangle-shaped structure, screw seat (13) bottom surface bilateral symmetry has set firmly two basic poles (26), extension rod (27) have been inserted in the middle part of basic pole (26) bottom surface, stopper (28) have been set firmly in the left side of backup pad (2) top surface, vertical groove (29) have been seted up for the position of stopper (28) tip in test rod (19) left wall, test rod (19) bottom surface (30) are equidistant glass cavity (30), cavity (30) have been seted up to have set up linear chute (30), the test rod is characterized in that a cleaning opening (33) is coaxially formed in the middle of the top surface of the test rod (19), a sealing cover (34) is arranged in the cleaning opening (33), two plate grooves (35) are symmetrically formed in the front and rear sides of the sealing cover (34), clamping plates (36) are arranged at the outer side ends of the inner sides of the plate grooves (35), compression springs C (37) are fixedly arranged between the inner side walls of the clamping plates (36) and the inner side walls of the plate grooves (35), clamping grooves (38) are formed in the inner walls of the cleaning opening (33) relative to the outer side ends of the clamping plates (36), the sealing cover (34) and the cleaning opening (33) are of T-shaped structures, the sealing cover (34) is in plug-in fit with the cleaning opening (33), the plate grooves (35) and the clamping plates (36) are of L-shaped structures, and the outer side ends of the clamping plates (36) penetrate through the opening ends of the plate grooves (35) to extend to the outside and are in clamping fit with the clamping grooves (38).

The outer thread (20) is in threaded connection with the thread seat (13), the drill bit (23) is of a circular ring structure, the limiting ring (22) is in running fit with the limiting groove (24), the lower end of the extending rod (27) is fixedly connected with the top surface of the drill bit (23), the base rod (26) and the extending rod (27) are of arc structures, the extending rod (27) is in sliding fit with the inside of the base rod (26), the limiting block (28) is of an L-shaped structure, the end part of the limiting block (28) is in sliding fit with the vertical groove (29), and the chute (32) is of an inclined structure with a high inner side and a low outer side.