CN111289287B - Soil sampling device - Google Patents

Abstract

The invention provides a soil sampling device, which includes a sampling mechanism, the sampling mechanism includes a drill pipe, two or more sampling boxes and a connecting rod transmission mechanism; the two or more sampling boxes are arranged at intervals in the length direction of the drill pipe , and are arranged at intervals in the circumferential direction of the drill rod; the drill rod is provided with a groove for accommodating the sampling box; two or more sampling boxes are driven by the connecting rod transmission mechanism to synchronously extend or return to the groove. Slot for taking more than two soil samples at the same time. In the present application, several sampling boxes are arranged on the drill pipe, and the sampling boxes are arranged at different heights and different circumferential directions. During sampling, multiple soil samples can be obtained at the same time, which improves the sampling efficiency. At the same time, the number of soil samples increases, and soil sampling is more efficient. Accurate, avoiding errors caused by accidental factors of a single sample in the past.

Description

A soil sampling device

technical field

The invention relates to the technical field of soil sampling, in particular to a soil sampling device and method for collecting soil samples during soil monitoring of forests, grasslands, cultivated land and the like.

Background technique

When monitoring softer geology such as forests, grasslands or cultivated land, it is necessary to collect soil samples at a set depth regularly or irregularly for analysis. However, the existing soil sample collection mostly adopts manual excavation, which is time-consuming, labor-intensive, and inefficient.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a soil sampling device to solve at least one of the above technical problems existing in the prior art.

In order to solve the above technical problems, the present invention provides a soil sampling device, including a sampling mechanism, the sampling mechanism includes: a drill pipe, two or more sampling boxes and a connecting rod transmission mechanism;

Two or more sampling boxes are arranged at intervals in the length direction of the drill pipe, and are arranged at intervals in the circumferential direction of the drill pipe;

The drill pipe is provided with a groove for accommodating the sampling box; two or more sampling boxes are driven by the connecting rod transmission mechanism to synchronously extend or retreat from the groove, so as to collect more than two soil samples at the same time. sample.

In the present application, several sampling boxes are arranged on the drill pipe, and the sampling boxes are arranged at different heights and different circumferential directions. During sampling, multiple soil samples can be obtained at the same time, which improves the sampling efficiency. At the same time, the number of soil samples increases, and soil sampling is more efficient. Accurate, avoiding errors caused by accidental factors of a single sample in the past.

Further, the linkage transmission mechanism includes a parallelogram linkage mechanism, a support rod and a push rod;

The parallelogram link mechanism includes a first link and a second link of equal length; one end of the first link and the second link is hingedly connected with the drill pipe, and the first link and the second link are hinged. The other end is hingedly connected with the sampling box; the parallelogram linkage mechanism is used to ensure that the opening direction (or length direction) of the sampling box is always perpendicular to the drill pipe;

One end of the support rod is hingedly connected to the sampling box; the other end of the support rod is hingedly connected to one end of the push rod; One end extends to the tail of the drill pipe through the pilot hole.

The sampling box is extended or retracted from the groove by pushing and pulling the push rod and the support rod, thereby realizing the soil sampling action.

Wherein, preferably, the head of the drill rod is provided with a drill head for drilling, and the sampling box is set on the middle part of the drill rod through a parallelogram linkage mechanism and a support rod, one end of the push rod is connected with the support rod, and the other end is connected with the support rod. It extends to the tail of the drill pipe through a guide hole provided in the drill pipe.

Further, guide grooves are provided on the left and right sides of the groove along the length direction of the drill rod, and the other end of the support rod is slidably connected to the guide groove through a pin shaft.

Further, it also includes a rake-type cover for covering the opening of the sampling box; the rake-type cover is assembled from a first half body and a second half body that are arranged oppositely; the first half body is provided with several a plurality of first claws, a plurality of second claws are arranged on the second half body, and in the width direction, a plurality of first claws and a plurality of second claws are alternately arranged in sequence;

In the length direction of the drill rod, the support rod and the first connecting rod are symmetrically arranged on the upper and lower sides of the sampling box; the first half body is fixedly arranged on the extension of the first connecting rod, and the second half body is fixedly arranged on the upper and lower sides of the sampling box. When the sampling box extends or retracts from the groove, the first connecting rod and the supporting rod swing relative to the sampling box, thereby driving the opening and closing of the first half body and the second half body.

Specifically, when the sampling box protrudes out of the groove, the first connecting rod and the support rod rotate in the positive direction relative to the sampling box, driving the first half body and the second half body to open, opening the opening of the sampling box, so that the soil The sample falls into the sampling box, and when the sampling box returns to the groove, the first connecting rod and the support rod rotate in the opposite direction relative to the sampling box, thereby driving the first half body and the second half body to close, sealing the opening of the sampling box cover.

Further, the ends of the first claw and the second claw and the side away from the drill rod are provided with a loosening claw (the loosening claw is a pointed protrusion arranged at an angle with the claw). When the sampling box extends out of the groove, the loosening claws are used to loosen the soil on the side wall of the borehole, and the loosened soil falls into the sampling box through the gap of the first claw or the gap of the second claw.

After setting the loosening claws, there is no need to squeeze the sampling box into the soil for sampling, which can avoid the sampling box stuck in the side wall of the borehole, easily retract the sampling box and take the whole device out of the borehole, and reduce the sampling time. The force of the support rod and the push rod can easily achieve soil sampling while improving the service life of the entire device, reducing maintenance costs and improving sampling efficiency.

Further, it also includes: a bracket, a lifting mechanism and a lifting frame; the lifting frame is arranged on the bracket so as to be movable up and down through the lifting mechanism; the sampling mechanism is arranged on the lifting frame, along with the lifting frame Moving up and down.

Further, the sampling mechanism further includes: a sampling motor (preferably a stepping motor), a main casing, a secondary casing and a coil spring;

the main casing is fixedly connected to the power output shaft of the sampling motor;

The upper end tail of the drill pipe can be inserted into the main casing slidably up and down;

the auxiliary casing is rotatably sheathed outside the main casing and the drill pipe;

An outer thread section is arranged on the middle and lower part of the outer circle of the main casing; the inner and upper end of the auxiliary casing is provided with a radially upwardly convex ring platform; an inner thread matched with the outer thread segment is arranged on the ring platform ;

The upper and lower ends of the outer thread section are respectively provided with an upper limit structure and a lower limit structure on the main casing;

Under the action of no external force, the middle hole diameter of the coil spring is smaller than the outer diameter of the tail of the drill pipe, the coil spring is arranged in the auxiliary casing, and is wound outside the tail of the drill pipe;

The two ends of the coil spring include: a fixed end set at the lower end and a free end set at the upper end; the fixed end is fixedly connected with the auxiliary sleeve;

The lower end of the main sleeve is fixedly provided with an unlocking holding part; the lower end of the unlocking holding part is provided with a helical wedge-shaped introduction block;

The sampling motor is reversed, the main casing is rotated in the opposite direction relative to the auxiliary casing, the wedge-shaped lead-in block is gradually wedged between the free end and the drill pipe, and the free end is lifted to force the winding spring to move. The middle hole diameter becomes larger, thereby releasing the lock on the drill rod; the unlocking holding part is inserted between the free end and the drill rod following the wedge-shaped introduction block to maintain the unlocked state of the coil spring, and the drill rod and the drill rod are inserted between the free end and the drill rod. The winding spring and the auxiliary casing can rotate relatively and can move up and down relatively; after the upper end face of the ring platform abuts on the upper limit structure, the power output shaft of the sampling motor can drive the auxiliary casing through the main casing The casing is reversed; the lower end of the auxiliary casing is connected to the other end (upper end) of the push rod, which is used to drive the push rod along the drill when the lifting frame moves up and down (the drill rod and the coil spring are in an unlocked state at this time). The rod moves axially;

The sampling motor rotates forward, the main casing rotates relatively forward relative to the auxiliary casing, the unlocking holding part and the wedge-shaped introduction block are withdrawn from the free end and the drill pipe in turn, and the coil spring is fixedly connected with the drill pipe by its own elastic force ( The coil spring tightly hugs the drill pipe), and the auxiliary casing can drive the coil spring and the drill pipe to rotate forward through the fixed end; The power output shaft of the sampling motor drives the drill pipe to rotate forwardly through the main casing, the auxiliary casing and the reel spring in sequence.

Further, it also includes a collar and a connecting wing plate, the collar is slidably sleeved on the drill pipe up and down; the collar is connected with the lower end of the auxiliary casing through a thrust bearing (in the circumferential direction of the auxiliary casing) , the collar and the auxiliary sleeve can rotate relatively; in the axial direction of the auxiliary sleeve, the collar and the auxiliary sleeve are relatively fixedly connected);

The drill rod is provided with a bar-shaped groove connecting the inside and outside of the guide hole along its axial direction; the connecting wing plate is slidably inserted into the bar-shaped groove, and the inner and outer ends of the connecting wing plate are respectively connected with the push rod and the collar. Fixed connection.

Further, the lifting mechanism includes: a lifting motor, a driving screw and a driving nut; the driving nut is fixedly connected with the lifting frame; the driving screw is rotatably arranged on the support, and the power output shaft of the lifting motor is connected with the driving screw . The lifting motor drives the lifting frame to move up and down sequentially through the transmission screw and the transmission nut.

Wherein, preferably, a guide structure for guiding when the lifting frame moves up and down is vertically arranged on the support. For example, vertically arranged guide posts and guide grooves, guide holes adapted to the guide posts, or sliders adapted to the guide slots, etc. are provided on the lifting frame.

Further, it also includes a controller (for example, a CPU, a single-chip computer or a WeChat computer), and the controller is electrically connected to the lift motor and the sampling motor respectively.

Further, a clamping assembly is also included, the clamping assembly is disposed at the middle and lower ends of the bracket, and is used for clamping and locking the drill rod. When the drill rod and the coil spring are stuck and the wedge-shaped lead-in block cannot be inserted or pulled out, the clamping assembly can force the drill rod to stop rotating by clamping the drill rod, so as to successfully complete the transition of unlocking or locking state.

Further, the clamping assembly includes: a clamping head and a telescopic piece (such as an air cylinder, an oil cylinder or an electric telescopic rod) symmetrically arranged on both sides of the drill pipe; the clamping head can approach the drill pipe under the drive of the telescopic piece, Then, the drill rod can be tightly locked to prevent the drill rod from rotating and moving up and down; the clamping head is driven away from the drill rod by the telescopic element, thereby releasing the locking of multiple drill rods.

In addition, the lifting frame is provided with a limit hole for limiting the position of the auxiliary sleeve, and the auxiliary sleeve can be inserted into the limit hole slidably up and down.

Adopt above-mentioned technical scheme, the present invention has following beneficial effect:

The soil sampling device provided by the invention has a higher degree of automation, can automatically realize soil collection according to a set mode, saves time and effort, and has high efficiency.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of a drill pipe part in a sampling mechanism provided by an embodiment of the present invention;

Fig. 2 is the side view of sampling box among Fig. 1;

Fig. 3 is the top view of the claw-type cover of the sampling box in Fig. 2;

Fig. 4 is the exploded schematic diagram of claw type cover body;

5 is a schematic structural diagram of a soil sampling device provided by an embodiment of the present invention;

Fig. 6 is the partial schematic diagram of the threaded connection between the main casing and the auxiliary casing in Fig. 5;

Fig. 7 is the sectional view of the connection of the coil spring, the drill pipe and the main casing;

Fig. 8 is an enlarged view at B in Fig. 5;

FIG. 9 is a schematic view of the structure of the clamping assembly.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The present invention will be further explained below in conjunction with specific embodiments.

As shown in FIG. 1 , a soil sampling device provided in this embodiment includes a sampling mechanism 100, and the sampling mechanism 100 includes: a drill pipe 110, two or more sampling boxes 120, and a connecting rod transmission mechanism 130;

Two or more sampling boxes 120 are arranged at intervals in the length direction of the drill rod 110, and are arranged at intervals in the circumferential direction of the drill rod 110;

The drill pipe 110 is provided with a groove 111 for accommodating the sampling box 120; under the driving of the connecting rod transmission mechanism 130, two or more sampling boxes 120 synchronously extend or withdraw from the groove 111 for simultaneously taking more than two soil samples sample.

In the present application, several sampling boxes 120 are arranged on the drill pipe 110. The sampling boxes 120 are arranged at different heights and different circumferential directions. During sampling, multiple soil samples can be obtained simultaneously, which improves the sampling efficiency and increases the number of soil samples. Soil sampling is more accurate, avoiding the errors caused by accidental factors of a single sample in the past.

The link transmission mechanism 130 includes a parallelogram link mechanism, a support rod 131 and a push rod 132;

The parallelogram linkage mechanism includes a first link 133 and a second link 134 of equal length; one end of the first link 133 and the second link 134 is hingedly connected with the drill pipe 110, and the first link 133 and the second link The other end of the rod 134 is hingedly connected with the sampling box 120; the parallelogram linkage mechanism is used to ensure that the opening direction (or length direction) of the sampling box 120 is always perpendicular to the drill pipe 110;

One end of the support rod 131 is hingedly connected to the sampling box 120; the other end of the support rod 131 is hingedly connected to one end of the push rod 132; The other end of the push rod 132 extends toward the tail of the drill rod 110 through the guide hole.

By pushing and pulling the push rod 132 and the support rod 131, the sampling box 120 can be extended or retracted from the groove 111, thereby realizing the soil sampling action.

Wherein, preferably, the head of the drill rod 110 is provided with a drill head for drilling, and the sampling box 120 is set on the middle part of the drill rod 110 through a parallelogram linkage mechanism and a support rod 131, and one end of the push rod 132 is connected to the support rod. The rod 131 is connected, and the other end extends toward the tail of the drill rod 110 through the guide hole 112 provided in the drill rod 110 .

In this embodiment, guide grooves 113 are provided on the left and right sides of the groove 111 along the length direction of the drill rod 110 , and the other end of the support rod 131 is slidably connected to the guide groove through a pin shaft.

As shown in FIGS. 1-4 , this embodiment further includes a claw-type cover for covering the opening of the sampling box 120; The first half body 210 is provided with several first claws 211, the second half body 220 is provided with several second claws 221, in the width direction, several first claws and several second rakes The claws are arranged staggered in sequence. In the length direction of the drill rod 110, the support rod 131 and the first connecting rod 133 are symmetrically arranged on the upper and lower sides of the sampling box 120; the first half body is fixedly arranged on the extension of the first connecting rod 133, and the second half body is fixed It is arranged on the extension of the support rod 131; when the sampling box 120 is extended or retracted from the groove 111, the first link 133 and the support rod 131 swing relative to the sampling box 120, thereby driving the first half body and the second half body body opening and closing.

Specifically, when the sampling box 120 protrudes out of the groove 111, the first connecting rod 133 and the support rod 131 swing forward relative to the sampling box 120, driving the first half body and the second half body to open, opening the sampling box The opening of 120 makes the soil sample fall into the sampling box 120, and when the sampling box 120 is retracted into the groove 111, the first connecting rod 133 and the support rod 131 swing in the opposite direction relative to the sampling box 120, thereby driving the first half body and the second half body is closed to cover the opening of the sampling box 120 .

The ends of the first claw and the second claw and the side away from the drill rod 110 are provided with a loosening claw 201 (the loosening claw is a pointed protrusion arranged at an included angle with the claw). When the sampling box 120 extends out of the groove 111 , the loosening claws are used to loosen the soil on the sidewall of the borehole, and the loosened soil falls into the sampling box 120 through the first claw gap or the second claw gap.

After setting the loosening claw, it is not necessary to squeeze the sampling box 120 into the soil for sampling, so that the sampling box 120 can be prevented from being stuck in the side wall of the borehole, the sampling box 120 can be easily retracted, and the whole device can be taken out from the borehole, and the reduction of the need to be reduced. The force of the support rod 131 and the push rod 132 during small sampling can easily achieve soil sampling, and at the same time improve the service life of the entire device, reduce maintenance costs, and improve sampling efficiency.

As shown in FIG. 5 , this embodiment further includes: a bracket 10 , a lifting mechanism 30 and a lifting frame 20 ; the lifting frame 20 is arranged on the bracket 10 so as to be movable up and down through the lifting mechanism; the sampling mechanism 100 is arranged on the lifting frame 20 . The lift frame 20 moves up and down.

The sampling mechanism 100 further includes: a sampling motor 41 (preferably a stepping motor), a main sleeve 42 , a sub-sleeve 43 and a coil spring 44 ;

The main sleeve 42 is fixedly connected to the power output shaft of the sampling motor 41;

The upper end tail of the drill pipe 110 is slidably inserted into the main casing 42;

The auxiliary casing 43 is rotatably sheathed outside the main casing 42 and the drill pipe 110;

As shown in Figures 6 and 7, an outer thread section 42a is arranged on the middle and lower part of the outer circle of the main casing 42; the inner and upper end of the auxiliary casing 43 is provided with a radially upwardly convex ring platform 43a; Internal thread for segment fit. An upper limit structure 42b and a lower limit structure 42c are respectively provided on the upper and lower ends of the external thread section on the main casing 42; under the action of no external force, the middle diameter of the coil spring 44 is smaller than the outer diameter of the tail of the drill pipe 110, and the coil spring 44 It is arranged in the auxiliary casing 43 and wrapped around the tail of the drill pipe 110 . Both ends of the coil spring 44 include: a fixed end provided at the lower end and a free end 44 a provided at the upper end; the fixed end is fixedly connected with the auxiliary sleeve 43 . The lower end of the main sleeve 42 is fixedly provided with an unlocking holding portion 42d (specifically, a sleeve segment); the lower end of the unlocking holding portion is provided with a helical wedge-shaped introduction block 42e.

The sampling motor 41 is reversed, the main sleeve 42 is rotated in the opposite direction relative to the auxiliary sleeve 43, the wedge-shaped lead-in block 42e is gradually wedged between the free end 44a and the drill pipe 110, and the coil spring 44 is forced by lifting the free end. The middle hole diameter of the drill pipe 110 becomes larger, and the locking of the drill rod 110 is released; the unlocking holding part 42c is inserted between the free end 44a and the drill rod 110 following the wedge-shaped introduction block, so as to maintain the unlocked state of the coil spring 44, and the drill rod 110 and the coil The winding spring 44 and the auxiliary sleeve 43 can rotate relative to each other and can move up and down relatively; after the upper end surface of the ring platform abuts on the upper limit structure, the power output shaft of the sampling motor 41 can drive the auxiliary sleeve 43 through the main sleeve 42 Reverse; the lower end of the auxiliary casing 43 is connected with the upper end of the push rod 132, and is used to drive the push rod 132 to move axially along the drill rod 110 when the lifting frame 20 moves up and down (the drill rod 110 and the coil spring 44 are in an unlocked state at this time); Specifically, as shown in FIG. 8 , the collar 70 is sleeved on the drill pipe 110 slidably up and down; the collar 70 is connected to the lower end of the auxiliary sleeve 43 through the thrust bearing 71 (in the circumferential direction of the auxiliary sleeve 43 , the sleeve The ring and the auxiliary casing 43 can rotate relative to each other; in the axial direction of the auxiliary casing 43, the collar and the auxiliary casing 43 are relatively fixedly connected); the drill rod 110 is provided with a strip connecting the inside and outside of the guide hole 112 along its axial direction. Slot 114; the connecting wing plate 72 is slidably inserted into the strip groove 114, and the inner and outer ends of the connecting wing plate are fixedly connected to the push rod 132 and the collar 70 respectively.

When the sampling motor 41 rotates forward, the main casing 42 rotates relatively forward relative to the auxiliary casing 43, the unlocking holding part and the wedge-shaped introduction block are withdrawn from the free end and the drill pipe 110 in turn, and the coil spring 44 relies on its own elastic force to connect with the drill pipe. The rod 110 is fixedly connected (the coil spring 44 tightly hugs the drill rod 110), and the auxiliary casing 43 can drive the coil spring 44 and the drill rod 110 to rotate forward through the fixed end; the lower end face of the ring platform abuts on the lower limit structure Afterwards, the power output shaft of the sampling motor 41 drives the drill pipe 110 to rotate forward through the main casing 42, the auxiliary casing 43 and the reel spring in sequence, thereby drilling holes in the soil through the drill pipe.

As shown in FIG. 5 , the lifting mechanism 30 includes: a lifting motor 31, a driving screw 33 and a driving nut 32; the driving nut is fixedly connected with the lifting frame 20; the driving screw is rotatably arranged on the bracket 10, and the power output shaft of the lifting motor is connected with Drive screw connection. The lift motor drives the lift frame 20 to move up and down sequentially through the drive screw and the drive nut.

Wherein, preferably, a guide structure for guiding when the lifting frame 20 moves up and down is vertically disposed on the bracket 10 . For example, vertically arranged guide posts and guide slots, guide holes adapted to the guide posts, or sliders adapted to the guide slots, etc. are provided on the lift frame 20 .

In addition, this embodiment also includes a controller (eg, a CPU, a single-chip computer, or a WeChat computer), and the controller is electrically connected to the lift motor and the sampling motor 41 respectively. The controller is in the prior art and will not be repeated here.

The above technical solution preferably further includes a clamping assembly 60 , which is disposed at the middle and lower ends of the bracket 10 for clamping and locking the drill rod 110 . When the drill rod 110 and the coil spring 44 are stuck and the wedge-shaped guide block cannot be inserted or pulled out, the clamping assembly can force the drill rod 110 to stop rotating by clamping the drill rod 110, so as to successfully complete the unlocking or locking state transition. In addition, after the drill pipe extends into the soil to the set depth, the locking state of the contact drill pipe and the coil spring is reversed by the sampling motor, the drill pipe is fixed by the clamping assembly, and then the lifting mechanism is activated, the lifting frame, the main casing, the auxiliary The casing, the connecting wing plate, and the push rod move downward, and the sampling box is pushed out of the groove through the support rod, and the raking claws are used to loosen the soil and take samples. The lifting mechanism reacts, the lifting frame, the main casing, the auxiliary casing, the connecting wing plate, and the push rod move upward, and the sampling box is returned to the groove through the support rod to realize the sealing of the soil sample.

As shown in FIG. 9 , the clamping assembly includes: a clamping head 62 symmetrically arranged on both sides of the drill rod 110 and a telescopic member 61 (eg, an air cylinder, an oil cylinder or an electric telescopic rod); the clamping head can approach the drill under the driving of the telescopic member The rod 110 can then be tightly locked to prevent the drill rod 110 from rotating and moving up and down;

In addition, the lifting frame 20 is preferably provided with a limit hole for limiting the position of the auxiliary sleeve 43, and the auxiliary sleeve 43 can be inserted into the limit hole slidably up and down.

The soil sampling device provided by the invention has a higher degree of automation, can automatically realize soil collection according to a set mode, saves time and effort, and has high efficiency.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (9)

1. A soil sampling device, comprising a sampling mechanism, the sampling mechanism comprising: a drill pipe, two or more sampling boxes and a connecting rod transmission mechanism; Two or more sampling boxes are arranged at intervals in the length direction of the drill pipe, and are arranged at intervals in the circumferential direction of the drill pipe; The drill pipe is provided with a groove for accommodating the sampling box; two or more sampling boxes are driven by the connecting rod transmission mechanism to synchronously extend or retreat from the groove, so as to collect more than two soil samples at the same time. sample; The link transmission mechanism includes a parallelogram link mechanism, a support rod and a push rod; The parallelogram linkage mechanism includes a first connecting rod and a second connecting rod of equal length; one end of the first connecting rod and the second connecting rod are hingedly connected with the drill pipe, and the first connecting rod and the second connecting rod are hingedly connected to the drill pipe. The other end is hingedly connected with the sampling box; the parallelogram linkage mechanism is used to ensure that the opening direction of the sampling box is always perpendicular to the drill pipe; One end of the support rod is hingedly connected to the sampling box; the other end of the support rod is hingedly connected to one end of the push rod; One end extends to the tail of the drill pipe through the pilot hole. 2 . The soil sampling device according to claim 1 , wherein the head of the drill pipe is provided with a drill head for drilling, and the sampling box is arranged at the position of the drill pipe through a parallelogram linkage mechanism and a support rod. 3 . In the middle part, one end of the push rod is connected with the support rod, and the other end extends to the tail of the drill rod through a guide hole provided in the drill rod. 3 . The soil sampling device according to claim 1 , wherein guide grooves are provided on the left and right sides of the groove along the length direction of the drill rod, and the other end of the support rod is slidably connected to the shaft through a pin. 4 . on the guide groove. 4 . The soil sampling device according to claim 2 , further comprising a claw-type cover for covering the opening of the sampling box; the claw-type cover is composed of a first half body and a second The two halves are assembled; the first half is provided with several first claws, the second half is provided with several second claws, and in the width direction, several first claws and several second claws The claws are arranged staggered in sequence; In the length direction of the drill rod, the support rod and the first connecting rod are symmetrically arranged on the upper and lower sides of the sampling box; the first half body is fixedly arranged on the extension of the first connecting rod, and the second half body is fixedly arranged on the upper and lower sides of the sampling box. When the sampling box is extended or retracted from the groove, the first connecting rod and the supporting rod swing relative to the sampling box, thereby driving the opening and closing of the first half body and the second half body. 5 . The soil sampling device according to claim 4 , wherein the ends of the first claws and the second claws and the side away from the drill rod are provided with loosening claws. 6 . 6 . The soil sampling device according to claim 1 , further comprising: a support, a lifting mechanism and a lifting frame; the lifting frame is arranged on the support so as to be movable up and down through the lifting mechanism; the The sampling mechanism is arranged on the lifting frame and moves up and down with the lifting frame. 7 . The soil sampling device according to claim 6 , wherein the lifting mechanism comprises: a lifting motor, a driving screw and a driving nut; the driving nut is fixedly connected with the lifting frame; the driving screw is rotatably arranged on the On the bracket, the power output shaft of the lifting motor is connected with the transmission screw. 8 . The soil sampling device according to claim 6 , wherein a guide structure for guiding the lifting frame to move up and down is vertically disposed on the support. 9 . 9 . The soil sampling device according to claim 6 , further comprising a clamping assembly, the clamping assembly is disposed at the middle and lower ends of the bracket, and is used for clamping and locking the drill pipe. 10 .

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