[go: up one dir, main page]

CN110823634A - Soil sampling device - Google Patents

Soil sampling device Download PDF

Info

Publication number
CN110823634A
CN110823634A CN201911323083.7A CN201911323083A CN110823634A CN 110823634 A CN110823634 A CN 110823634A CN 201911323083 A CN201911323083 A CN 201911323083A CN 110823634 A CN110823634 A CN 110823634A
Authority
CN
China
Prior art keywords
sampling
rod
soil
connecting rod
rotating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201911323083.7A
Other languages
Chinese (zh)
Inventor
陈楠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201911323083.7A priority Critical patent/CN110823634A/en
Publication of CN110823634A publication Critical patent/CN110823634A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/02Devices for withdrawing samples
    • G01N1/04Devices for withdrawing samples in the solid state, e.g. by cutting
    • G01N1/08Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

The invention discloses a soil sampling device, which comprises a connecting rod; the upper end of the connecting rod is fixedly arranged on the driving mechanism, and the lower end of the connecting rod is detachably connected with the upper end of the drill bit through a bolt; a cavity is formed at the joint of the connecting rod and the drill bit; a sampling mechanism is arranged in the cavity; the sampling mechanism comprises a sampling motor, a sampling reciprocating screw rod, a sampling sleeve, a sampling connecting rod, a sampling rotating rod and a rotating shaft. The soil sampling device can be used for conveniently sampling soil by arranging the sampling mechanism, and the soil cannot enter the cavity in the descending process of the drill bit, so that the soil at the bottom of the cavity can be ensured to be soil with required depth; by arranging the driving mechanism, the drill bit can be conveniently conveyed into the soil, so that the sampling is convenient; through setting up wheel mechanism and positioning mechanism, can be convenient for remove and fix a position sampling device.

Description

Soil sampling device
Technical Field
The invention relates to the field of soil, in particular to a soil sampling device.
Background
With the rapid development of society, more and more heavy factories are built, which generate a great amount of pollutants during working, and in order to know the pollution condition of the environment around the factories, the soil near the factories needs to be detected, and the amount of the pollutants in the soil needs to be detected. When taking a sample to these soils, often can adopt soil sampling device to take a sample to the soil under the earth's surface, current most sampling device when taking a sample, because its sample department leakproofness is relatively poor, results in the drill bit to get into in the collection box at the soil of other places of lapse in-process, and the soil that leads to taking out is the different degree of depth to influence the testing result.
Disclosure of Invention
The present invention is directed to a soil sampling device to solve the above problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a soil sampling device comprises a sampling device top plate, supporting legs, a driving mechanism and a drill bit; a plurality of supporting legs are arranged below the top plate of the sampling device; a driving mechanism is arranged on a top plate of the sampling device positioned at the central part of the plurality of supporting legs; a drill bit is arranged below the driving mechanism; the device also comprises a connecting rod; the upper end of the connecting rod is fixedly arranged on the driving mechanism, and the lower end of the connecting rod is detachably connected with the upper end of the drill bit through a bolt; a cavity is formed at the joint of the connecting rod and the drill bit; a sampling mechanism is arranged in the cavity; the sampling mechanism comprises a sampling motor, a sampling reciprocating screw rod, a sampling sleeve, a sampling connecting rod, a sampling rotating rod and a rotating shaft; the motor is fixed at the top of the cavity, and the rotating end of the motor is connected with a sampling reciprocating screw rod which is rotatably arranged in the cavity; the sampling sleeve matched with the reciprocating chute on the sampling reciprocating screw rod is rotationally arranged on the sampling reciprocating screw rod; one end of the sampling connecting rod is rotatably arranged on each of two sides of the sampling sleeve respectively; the other end of the sampling connecting rod is rotatably arranged on one side of the top of the sampling rotating rod; the central part of the sampling rotating rod is rotatably arranged on the connecting rod through a rotating shaft; when the sampling sleeve is located the reciprocal spout top of sample connecting rod, the sample dwang is just vertical.
As a further scheme of the invention: the driving mechanism comprises a driving motor, a driving reciprocating screw rod, a rotating lifting rod, a lifting sleeve and a fixed rod; a driving motor is fixed at the bottom of the top plate of the sampling device, and the rotating end of the driving motor is connected with the upper end of a driving reciprocating screw rod; the driving reciprocating screw rod is rotatably arranged in the rotating lifting rod, and the fixed block in the rotating lifting rod is slidably arranged in the reciprocating chute on the driving reciprocating screw rod; a threaded chute is arranged on the outer side of the rotary lifting rod; the lifting sleeve matched with the threaded sliding groove on the outer side of the rotary lifting rod is fixed on the supporting leg through a fixed rod; the bottom of the rotary lifting rod is fixedly connected with the upper end of a connecting rod.
As a still further scheme of the invention: the lower end of the sampling rotating rod is designed to be in a sharp cone shape.
As a still further scheme of the invention: the bottom of drill bit is established to the toper, and the outside of its upper end is provided with flood dragon blade.
As a still further scheme of the invention: and a control device for controlling the driving motor and the sampling motor to work is also arranged on one side of the top plate of the sampling device.
As a still further scheme of the invention: the bottom of the supporting leg is also provided with a wheel mechanism; the wheel mechanism comprises a supporting leg opening side, an inner sliding rod, a spring and wheels; the bottom of the supporting leg is provided with a supporting leg opening side with the inner diameter larger than that of the wheel; the supporting leg above the opening side of the supporting leg is provided with a sliding groove; an inner sliding rod is arranged in the sliding groove in a sliding mode; the sliding groove is connected with the inner sliding rod through a spring; a limiting block for preventing the inner sliding rod from being separated is arranged in the sliding groove; the bottom of the inner sliding rod is rotatably provided with wheels.
As a still further scheme of the invention: one side of the supporting leg is also provided with a positioning mechanism; the positioning mechanism comprises a positioning block, a conical head and a fixing plate, wherein the conical head is fixed at the lower end of the fixing plate; a fixing plate is fixed at the upper end of the positioning block; a plurality of threaded holes are formed in the fixing plate; and a plurality of threaded holes matched with the threaded holes of the fixing plate are formed in the vertical direction of one side of the supporting leg.
Compared with the prior art, the invention has the beneficial effects that: by arranging the sampling mechanism, the soil can be conveniently sampled, and the soil cannot enter the cavity in the descending process of the drill bit, so that the soil at the bottom of the cavity can be ensured to be the soil with the required depth; by arranging the driving mechanism, the drill bit can be conveniently conveyed into the soil, so that the sampling is convenient; through setting up wheel mechanism and positioning mechanism, can be convenient for remove and fix a position sampling device.
Drawings
Fig. 1 is a schematic structural view of a soil sampling device.
Fig. 2 is a schematic structural diagram of a driving mechanism in the soil sampling device.
Fig. 3 is an enlarged schematic view of the internal structure of part a in fig. 1.
In the figure: 1-sampling device top plate, 2-supporting leg, 3-driving motor, 4-driving reciprocating screw rod, 5-rotating lifting rod, 6-lifting sleeve, 7-fixing rod, 8-connecting rod, 9-drill bit, 10-sampling motor, 11-sampling reciprocating screw rod, 12-sampling sleeve, 13-sampling connecting rod, 14-sampling rotating rod, 15-rotating shaft, 16-supporting leg opening side, 17-inner sliding rod, 18-spring, 19-wheel, 20-positioning block, 21-conical head and 22-fixing plate.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific embodiments.
Example 1
Referring to fig. 1-3, the present embodiment provides a soil sampling device, which includes a sampling device top plate 1, support legs 2, a driving mechanism and a drill bit 9; a plurality of supporting legs 2 are arranged below the sampling device top plate 1; a driving mechanism is arranged on a sampling device top plate 1 positioned at the central part of a plurality of supporting legs 2; a drill bit 9 is arranged below the driving mechanism; also comprises a connecting rod 8; the upper end of the connecting rod 8 is fixedly arranged on the driving mechanism, and the lower end of the connecting rod is detachably connected with the upper end of the drill bit 9 through a bolt; a cavity is formed at the joint of the connecting rod 8 and the drill bit 9; a sampling mechanism is arranged in the cavity; the sampling mechanism comprises a sampling motor 10, a sampling reciprocating screw rod 11, a sampling sleeve 12, a sampling connecting rod 13, a sampling rotating rod 14 and a rotating shaft 15; the motor 10 is fixed at the top of the cavity, and the rotating end of the motor is connected with a sampling reciprocating screw rod 11 which is rotatably arranged in the cavity; the sampling sleeve 12 which is matched with the reciprocating chute on the sampling reciprocating screw rod 11 is rotationally arranged on the sampling reciprocating screw rod 11; two sides of the sampling sleeve 12 are respectively and rotatably provided with one end of a sampling connecting rod 13; the other end of the sampling connecting rod 13 is rotatably arranged on one side of the top of the sampling rotating rod 14; the central part of the sampling rotating rod 14 is rotatably arranged on the connecting rod 8 through a rotating shaft 15; when the sampling sleeve 12 is positioned at the top end of the reciprocating chute of the sampling connecting rod 13, the sampling rotating rod 14 is just vertical, the arrangement is such that when a driving mechanism sends the drill bit 9 into soil, and when sampling is needed, the sampling motor 10 starts to work, thereby driving the sampling reciprocating screw rod 11 to rotate, because the sampling sleeve 12 cannot rotate, the sampling sleeve 12 reciprocates up and down, thereby driving the sampling connecting rod 13 to swing up and down in a reciprocating manner, thereby driving the two sampling rotating rods 14 to swing outwards in a reciprocating manner, thereby being capable of excavating the soil with the depth into a cavity until the soil is accumulated at the bottom of the sampling rotating rod 14, then the driving mechanism drives the drill bit to ascend, then the connecting rod 8 is separated from the drill bit 9, because the sampling rotating rod 14 may not completely seal the inner cavity in the ascending process, thereby causing the soil with other depths to enter the cavity, and therefore the upper soil in, only the soil at the bottom layer is left, so that a soil sample with the required depth can be obtained.
The driving mechanism comprises a driving motor 3, a driving reciprocating screw rod 4, a rotating lifting rod 5, a lifting sleeve 6 and a fixed rod 7; a driving motor 3 is fixed at the bottom of the sampling device top plate 1, and the rotating end of the driving motor is connected with the upper end of a driving reciprocating screw rod 4; the driving reciprocating screw rod 4 is rotationally arranged in the rotary lifting rod 5, and a fixed block in the rotary lifting rod 5 is slidably arranged in a reciprocating chute on the driving reciprocating screw rod 4; a threaded chute is arranged on the outer side of the rotary lifting rod 5; a lifting sleeve 6 matched with the threaded sliding groove on the outer side of the rotary lifting rod 5 is fixed on the supporting leg 2 through a fixing rod 7; rotate the bottom fixedly connected with connecting rod 8's of lifter 5 upper end, set up like this, when driving motor 3 during operation, drive the reciprocal lead screw 4 of drive and rotate, under the effect of the reciprocal lead screw 4 of drive and lifting sleeve 6, rotate 5 limit rotations of lifter and descend simultaneously, thereby drive 8 limit rotations of connecting rod and descend simultaneously, thereby can send the drill bit 9 to soil inside smoothly, when the fixed block in the rotation lifter 5 slides the bottom of the reciprocal spout on the reciprocal lead screw 4 of drive, rotate 5 limit rotations of lifter and rise simultaneously, thereby drive drill bit 9 rebound.
In order to facilitate the sampling of the soil, the lower end of the sampling rotating rod 14 is set to be in a sharp cone shape, so that the sampling rotating rod 14 can be rotated outwards, and the soil can be conveniently sampled.
In order to be convenient for sending the drill bit 9 into the soil, the bottom of the drill bit 9 is conical, and the outer side of the upper end of the drill bit 9 is provided with flood dragon blades, so that the drill bit 9 can be facilitated to penetrate into the soil.
In order to facilitate the control of the operation of the drive motor 3 and the sampling motor 10; and a control device for controlling the driving motor 3 and the sampling motor 10 to work is also arranged on one side of the sampling device top plate 1.
The working principle of the embodiment is as follows: when the driving mechanism sends the drill bit 9 into the soil and sampling is needed, the sampling motor 10 starts to work, thereby driving the sampling reciprocating screw rod 11 to rotate, because the sampling sleeve 12 can not rotate, the sampling sleeve 12 moves up and down in a reciprocating way, thereby driving the sampling connecting rod 13 to swing up and down in a reciprocating way, thereby driving the two sampling rotating rods 14 to swing to the outer side in a reciprocating manner, so that the soil with the depth can be excavated into the cavity until the soil is accumulated at the bottom of the sampling rotating rods 14, then the driving mechanism drives the drill bit to ascend, then the connecting rod 8 is separated from the drill bit 9, since the sampling rotating rod 14 may not completely seal the cavity during ascent, resulting in the possibility of soil entering the cavity at other depths, therefore, the upper soil in the inner cavity is removed, only the soil at the bottom layer is left, and the soil sample with the required depth can be obtained.
The operating principle of the driving mechanism is that when the driving motor 3 works, the driving reciprocating screw rod 4 is driven to rotate, under the action of the driving reciprocating screw rod 4 and the lifting sleeve 6, the lifting rod 5 is rotated and descends while rotating, so that the connecting rod 8 is driven to descend while rotating, the drill bit 9 can be smoothly conveyed into the soil, when the fixed block in the driving lifting rod 5 slides to the bottom of the reciprocating chute on the driving reciprocating screw rod 4, the lifting rod 5 is rotated while rotating, and the drill bit 9 is driven to move upwards.
Example 2
The embodiment is further improved on the basis of the embodiment 1, and the improvement is as follows: in order to facilitate the movement of the sampling device, the bottom of the supporting leg 2 is also provided with a wheel mechanism; the wheel mechanism includes a support leg opening side 16, an inner slide bar 17, a spring 18, and a wheel 19; the bottom of the supporting leg 2 is provided with a supporting leg opening side 16 with the inner diameter larger than that of the wheel 19; a sliding groove is formed on the supporting leg 2 above the supporting leg opening side 16; an inner sliding rod 17 is arranged in the sliding groove in a sliding mode; the sliding groove is connected with the inner sliding rod 17 through a spring 18; a limiting block for preventing the inner sliding rod 17 from being separated is arranged in the sliding groove; the bottom of the inner sliding rod 17 is rotatably provided with a wheel 19; with the arrangement, the vibration of the sampling device caused by uneven ground can be prevented by the damping effect of the spring 18, so that the stability of the structure of the whole device is influenced.
In order to prevent the drill bit 9 from being damaged due to the deviation of the sampling device when the drill bit 9 goes deep into the ground, a positioning mechanism is arranged on one side of the supporting leg 2; the positioning mechanism comprises a positioning block 20, a conical head 21 and a fixing plate 22, wherein the conical head 21 is fixed at the lower end of the fixing plate 22; a fixing plate 22 is fixed at the upper end of the positioning block 20; a plurality of threaded holes are formed in the fixing plate 22; a plurality of screw holes matched with the screw hole of fixed plate 22 are seted up to the vertical direction in one side of supporting leg 2, set up like this, can adjust the upper and lower height of locating piece 20 to make conical head 21 go deep into the ground, wheel 19 leaves ground, thereby can fix sampling device, can not take place the skew when the sample.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (7)

1. A soil sampling device comprises a sampling device top plate (1), supporting legs (2), a driving mechanism and a drill bit (9); a plurality of supporting legs (2) are arranged below the sampling device top plate (1); a driving mechanism is arranged on a sampling device top plate (1) positioned at the central part of the plurality of supporting legs (2); a drill bit (9) is arranged below the driving mechanism; it is characterized by also comprising a connecting rod (8); the upper end of the connecting rod (8) is fixedly arranged on the driving mechanism, and the lower end of the connecting rod is detachably connected with the upper end of the drill bit (9) through a bolt; a cavity is formed at the joint of the connecting rod (8) and the drill bit (9); a sampling mechanism is arranged in the cavity; the sampling mechanism comprises a sampling motor (10), a sampling reciprocating screw rod (11), a sampling sleeve (12), a sampling connecting rod (13), a sampling rotating rod (14) and a rotating shaft (15); the motor (10) is fixed at the top of the cavity, and the rotating end of the motor is connected with a sampling reciprocating screw rod (11) which is rotatably arranged in the cavity; a sampling sleeve (12) which is matched with the reciprocating chute on the sampling reciprocating screw rod (11) is rotationally arranged on the sampling reciprocating screw rod (11); one end of a sampling connecting rod (13) is respectively and rotatably arranged at two sides of the sampling sleeve (12); the other end of the sampling connecting rod (13) is rotatably arranged on one side of the top of the sampling rotating rod (14); the central part of the sampling rotating rod (14) is rotatably arranged on the connecting rod (8) through a rotating shaft (15); when the sampling sleeve (12) is positioned at the top end of the reciprocating chute of the sampling connecting rod (13), the sampling rotating rod (14) is just vertical.
2. Soil sampling device according to claim 1, characterized in that the driving mechanism comprises a driving motor (3), a driving reciprocating screw (4), a rotating lifting rod (5), a lifting sleeve (6) and a fixed rod (7); a driving motor (3) is fixed at the bottom of the sampling device top plate (1), and the rotating end of the driving motor is connected with the upper end of a driving reciprocating screw rod (4); the driving reciprocating screw rod (4) is rotatably arranged in the rotating lifting rod (5), and a fixed block in the rotating lifting rod (5) is slidably arranged in a reciprocating chute on the driving reciprocating screw rod (4); a threaded chute is arranged on the outer side of the rotary lifting rod (5); a lifting sleeve (6) matched with the threaded sliding groove on the outer side of the rotary lifting rod (5) is fixed on the supporting leg (2) through a fixing rod (7); the bottom of the rotary lifting rod (5) is fixedly connected with the upper end of a connecting rod (8).
3. Soil sampling device according to claim 2, characterized in that the lower end of the sampling swivelling lever (14) is provided with a pointed cone.
4. Soil sampling device according to claim 2, characterized in that the bottom of the drill bit (9) is provided with a conical shape and the outside of its upper end is provided with flood dragon blades.
5. Soil sampling device according to claim 1, characterized in that one side of the sampling device top plate (1) is further provided with a control device for controlling the operation of the drive motor (3) and the sampling motor (10).
6. Soil sampling device according to claim 2, characterized in that the bottom of the support leg (2) is also provided with a wheel mechanism; the wheel mechanism comprises a supporting leg opening side (16), an inner sliding rod (17), a spring (18) and a wheel (19); the bottom of the supporting leg (2) is provided with a supporting leg opening side (16) with the inner diameter larger than that of the wheel (19); a sliding groove is formed in the supporting leg (2) above the supporting leg opening side (16); an inner sliding rod (17) is arranged in the sliding groove in a sliding manner; the sliding groove is connected with the inner sliding rod (17) through a spring (18); a limiting block for preventing the inner sliding rod (17) from being separated is arranged in the sliding groove; the bottom of the inner sliding rod (17) is rotatably provided with wheels (19).
7. Soil sampling device according to claim 6, characterized in that one side of the support leg (2) is further provided with a positioning mechanism; the positioning mechanism comprises a positioning block (20), a conical head (21) and a fixing plate (22), wherein the conical head (21) is fixed at the lower end of the fixing plate (22); a fixing plate (22) is fixed at the upper end of the positioning block (20); a plurality of threaded holes are formed in the fixing plate (22); a plurality of threaded holes matched with the threaded holes of the fixing plate (22) are formed in the vertical direction of one side of the supporting leg (2).
CN201911323083.7A 2019-12-20 2019-12-20 Soil sampling device Withdrawn CN110823634A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911323083.7A CN110823634A (en) 2019-12-20 2019-12-20 Soil sampling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911323083.7A CN110823634A (en) 2019-12-20 2019-12-20 Soil sampling device

Publications (1)

Publication Number Publication Date
CN110823634A true CN110823634A (en) 2020-02-21

Family

ID=69545991

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911323083.7A Withdrawn CN110823634A (en) 2019-12-20 2019-12-20 Soil sampling device

Country Status (1)

Country Link
CN (1) CN110823634A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111879555A (en) * 2020-08-26 2020-11-03 王跃峰 Portable geotome for building
CN112649228A (en) * 2020-12-30 2021-04-13 广东省地质技术工程咨询公司 Soil and water sampling device that portable geothermol power investigation was used
CN116026634A (en) * 2023-02-24 2023-04-28 河北省生态环境科学研究院 A portable polluted soil sampling device for environmental engineering

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111879555A (en) * 2020-08-26 2020-11-03 王跃峰 Portable geotome for building
CN111879555B (en) * 2020-08-26 2023-10-24 威海鹏飞自动化技术有限公司 Portable soil sampler for building
CN112649228A (en) * 2020-12-30 2021-04-13 广东省地质技术工程咨询公司 Soil and water sampling device that portable geothermol power investigation was used
CN116026634A (en) * 2023-02-24 2023-04-28 河北省生态环境科学研究院 A portable polluted soil sampling device for environmental engineering

Similar Documents

Publication Publication Date Title
CN110823634A (en) Soil sampling device
US3794127A (en) Hollow auger-driver coupling
US12247901B1 (en) Soil layer detection drilling device
CN107724950B (en) Rotary type verticality adjustable drilling machine
CN215065393U (en) Soil sampler for testing and detecting foundation and rock soil of hydraulic and hydroelectric engineering
CN107367400A (en) Boring and coring device for road engineering quality inspection
CN108848771B (en) Tea seedling planting equipment
CN216197837U (en) Deviation device is prevented with probing to geotechnical engineering reconnaissance
CN208333323U (en) A kind of land surveying soil thickness measuring device
CN114541963A (en) Vertical slope punching device and method for mine ecological restoration
CN213775238U (en) Building is monitored and is surveyd and use rig
CN210856895U (en) Road maintenance is with pile drilling equipment
CN112378699A (en) Drilling equipment convenient to petroleum geology sample detection
CN115950670B (en) Soil sampling system and soil sampling method for setting layer depth
CN116499795A (en) Rock and soil sampling drilling method
CN216788277U (en) Drilling device for geotechnical engineering investigation
CN116696339A (en) Drilling inner side geological exploration sampling device
CN213779557U (en) Soil pollution investigation rotary spiral drilling sampling device
CN212254649U (en) Soil sampling device for geological exploration
CN219220334U (en) Perforating and drilling device for highway maintenance
CN114235470B (en) Independent underwater ore survey rock drilling machine
CN212406585U (en) Drill hole positioning device of cast-in-place pile drilling machine
CN118669056B (en) Drilling device for pile foundation construction
CN221863507U (en) A tree planting depth control device
CN206920154U (en) Cement stabilized macadam base core-drilling machine

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication

Application publication date: 20200221

WW01 Invention patent application withdrawn after publication