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CN-121976512-A - Low disturbance combined type soil breaking drilling tool for engineering quality detection

CN121976512ACN 121976512 ACN121976512 ACN 121976512ACN-121976512-A

Abstract

The invention belongs to the technical field of engineering quality detection, and discloses a low-disturbance combined type earth breaking drilling tool for engineering quality detection, which comprises a connector connected with a power end, wherein the connector is connected with a sampling mechanism, the sampling mechanism is connected with an earth breaking mechanism, in engineering quality detection, low-disturbance sampling is a key for guaranteeing accuracy of detection data, in engineering quality detection, low-disturbance sampling is a key for accuracy of detection data, the existing drilling tool depends on a redundant component, and has the advantages of complex structure, high processing and maintenance cost, large assembly error, easiness in swing due to stress concentration during rotation, and capability of extruding a friction hole wall and a soil sample to damage an original structure of the drilling tool. The drilling tool adopts a modularized pure mechanical design, simplifies the structure, reduces the cost, prevents soil mass from gathering and extruding by the spiral ribs and the soil unloading groove, reduces disturbance, balances pressure by the air exhausting holes, automatically seals the hinged baffle plate and the baffle ring to ensure complete soil sample, improves the efficiency of the magnetic connector and the convenient soil sampling structure, realizes low disturbance sampling in the whole process, and ensures reliable detection data.

Inventors

  • LIU SHAOLI
  • LI FEIYANG
  • YAN XIAOTAO
  • FU HAOYANG
  • TAN FENG

Assignees

  • 重庆建设工程质量监督检测中心有限公司

Dates

Publication Date
20260505
Application Date
20260107

Claims (10)

  1. 1. The low-disturbance combined type soil breaking drilling tool for engineering quality detection comprises a connector (1) connected with a power end, and is characterized in that the connector (1) is connected with a sampling mechanism (2), and the sampling mechanism (2) is connected with a soil breaking mechanism (3); The sampling mechanism (2) comprises a sampling tube (21) with a hollow inside, a hinge post (22) is arranged in the sampling tube (21), two ends of the hinge post (22) are symmetrically hinged with baffle plates (23), the specification and the size of each baffle plate (23) are matched with those of the sampling tube (21), a baffle ring (24) is arranged in the sampling tube (21) at the lower side position of the hinge post (22), and when the baffle plates (23) contact with the baffle rings (24), the baffle plates (23) are in a horizontal state; The soil breaking mechanism (3) comprises a soil breaking pipe (31) with a hollow inside, the soil breaking pipe (31) is in butt joint with the sampling pipe (21), a drill bit (32) is arranged at the soil entering end of the soil breaking pipe (31), and the drill bit (32) is hollow inside; The drill bit (32), the ground breaking pipe (31) and the sampling pipe (21) are the same in inner diameter, and the drill bit (32), the ground breaking pipe (31) and the sampling pipe (21) synchronously rotate.
  2. 2. The low disturbance combined soil breaking drilling tool for engineering quality detection according to claim 1, wherein the sampling tube (21) is provided with a gas elimination hole (25).
  3. 3. The low disturbance combined soil breaking drilling tool for engineering quality detection according to claim 1, wherein a plug head (26) is connected to one end of the sampling tube (21) far away from the drill bit (32) in an internal threaded mode, one end of the sampling tube (21) is plugged by the plug head (26), and a screwing plate (27) is fixedly connected to the plug head (26).
  4. 4. The low disturbance combined soil breaking drilling tool for engineering quality inspection according to claim 1, wherein the sampling tube (21) is internally and integrally connected with an inclined guide plate (28) at the lower side of the baffle ring (24).
  5. 5. The low disturbance combined earth breaker for engineering quality inspection according to claim 1, wherein the hinge post (22) is provided with a stopper such that the two baffles (23) cannot be fully attached.
  6. 6. The low disturbance combined type soil breaking drilling tool for engineering quality detection according to claim 1, wherein the outer side of the soil breaking pipe (31) is integrally connected with a spiral rib (33).
  7. 7. The low disturbance combined type soil breaking drilling tool for engineering quality detection according to claim 1, wherein the drill bit (32), the soil breaking pipe (31) and the sampling pipe (21) are connected by adopting threads, and the screw locking direction of the threads is the same as the rotation direction during operation.
  8. 8. The low disturbance combined type soil breaking drilling tool for engineering quality detection according to claim 1, wherein the drill bit (32) is uniformly provided with soil penetrating claws (321), and a soil unloading groove (322) is formed between two adjacent soil penetrating claws (321).
  9. 9. The low disturbance combined earth breaker for engineering quality inspection according to claim 1, wherein the drill bit (32) is formed by splicing a plurality of drill bits, and the drill bit is sequentially provided with a pilot spiral cutting edge (3201), a main spiral cutting tooth (3202) and a spiral centering wing (3203) from a soil entering end.
  10. 10. The low-disturbance combined type soil breaking drilling tool for engineering quality detection according to claim 1, wherein the connector (1) is a hexahedral connector and is magnetic.

Description

Low disturbance combined type soil breaking drilling tool for engineering quality detection Technical Field The invention belongs to the technical field of engineering quality detection, and particularly relates to a low-disturbance combined type earth breaking drilling tool for engineering quality detection. Background In the field of engineering quality detection, the original structural integrity of a soil sample directly determines the accuracy of detection data, and low-disturbance sampling is a core premise for guaranteeing the reliability of a detection result. The existing earth breaking drilling tool is used for pursuing low disturbance effect, a plurality of groups of hydraulic driving assemblies, electronic control modules and redundant linkage mechanisms are often adopted, so that the overall structural design is too complex, the high-precision machining process is required to match the assembly precision of each part, auxiliary structures such as sealing and damping are required to be additionally arranged, the machining difficulty and the manufacturing cost of the drilling tool are greatly increased, meanwhile, the assembly error risk is also improved due to a large number of parts, and mass production and field maintenance are not facilitated. However, the conventional drilling tool with the complex structure still has the key technical defects that due to uneven rigidity distribution of each functional module, when the drilling tool rotates to drill, torque and axial force are easy to be transmitted to be unbalanced, stress concentration phenomenon is caused, and the drilling tool is further caused to generate radial swing with larger amplitude, the swing not only can damage the verticality of the drilling hole, but also can cause severe extrusion and friction disturbance on a hole wall soil body, so that the particle arrangement and the pore structure of a reserved soil sample are changed, the authenticity of detection data is seriously influenced, meanwhile, the abrasion of drilling tool parts is aggravated by extra stress generated by swing, the service life is shortened, and the practical requirements of engineering quality detection on low disturbance and high-precision sampling are difficult to be stably met. Disclosure of Invention Aiming at the problems of the background technology, the invention aims to provide a low-disturbance combined type earth breaking drilling tool for engineering quality detection. In order to achieve the technical purpose, the invention adopts the following technical scheme: The low-disturbance combined type soil breaking drilling tool for engineering quality detection comprises a connector connected with a power end, wherein the connector is connected with a sampling mechanism, and the sampling mechanism is connected with a soil breaking mechanism; The sampling mechanism comprises a sampling tube with a hollow inside, a hinge post is arranged in the sampling tube, two ends of the hinge post are symmetrically hinged with baffle plates, the specification and the size of the two baffle plates are matched with those of the sampling tube, a baffle ring is arranged in the sampling tube at the lower side position of the hinge post, and when the baffle plates contact the baffle ring, the baffle plates are in a horizontal state; The soil breaking mechanism comprises a hollow soil breaking pipe, the soil breaking pipe is in butt joint with the sampling pipe, a drill bit is arranged at the soil end of the soil breaking pipe, and the inside of the drill bit is hollow; the drill bit, the soil breaking pipe and the sampling pipe have the same inner diameter, and the drill bit, the soil breaking pipe and the sampling pipe synchronously rotate. Further limited, the sampling tube is provided with an air elimination hole, so that the redundant accumulation of the sample in the sampling tube can be prevented from being excessively extruded, and the real structure of the sampling tube is further damaged. Further limited, the sampling tube is kept away from the inside threaded connection of one end of drill bit has the chock plug, the chock plug shutoff the one end of sampling tube, chock plug fixedly connected with twists the board, through taking off the chock plug, can be convenient take out its inside soil sample. Further limited, the sampling tube is internally and integrally connected with an inclined guide plate at the lower side of the baffle ring to guide the soil sample. Further limiting, the hinge column is provided with a limiter, so that the two baffles cannot be completely attached, when the drilling tool is prevented from being extracted upwards, the dead weight of the soil sample cannot force the two baffles to return to be in contact with the baffle ring at the side, and the effect of sealing is achieved. Further limiting, the outside of the broken soil pipe is integrally connected with spiral ribs, so that the broken soil and the soil samples at two sides are