A sampling device for soil environment detection

Abstract

The application relates to a sampling device for soil environment detection and belongs to the technical field of soil sampling devices. The sampling device comprises a sampling cylinder, a support, a lifting driving mechanism and a connecting assembly. The bottom end of the sampling cylinder is open, and the inside of the sampling cylinder is hollow. The bottom of the support is provided with a vertically-extended insertion rod used for being inserted into a soil body. The lifting driving mechanism is installed above the support and is provided with a lifting output end capable of reciprocating up and down. The connecting assembly is installed on the lifting output end of the lifting driving mechanism and is provided with a connection state one and a connection state two after rotating 180 degrees around a horizontal axis. The connecting assembly comprises an inner sleeve used for being sleeved outside the sampling cylinder. A plurality of grooves are uniformly distributed on the inner side wall of the inner sleeve. An inclined slide is arranged on the groove side wall. A ball is arranged in the groove, and the ball partially extends to the outside of the groove and is pressed on the sampling cylinder. The application can automatically insert and pull out the sampling cylinder, and can improve the work efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soil sampling devices, in particular to a sampling device for soil environment detection. BACKGROUND

[0002] Soil environment detection is a process of systematically analyzing the types, concentrations, distribution and ecological risks of pollutants in soil, and is an important foundation work in the fields of environmental protection, land management, agricultural production and engineering construction. When soil environment detection is performed, a soil sampler is used to collect soil samples from the ground or underground, and then the samples are processed, and the soil environment is evaluated according to the detection results.

[0003] In the prior art, a dedicated soil sampler is usually used for sampling, such as the soil sampling device disclosed in the patent with the authorized announcement number CN211179056U. The device includes an outer cylinder, which is a hollow cylinder structure with the upper and lower surfaces removed. A first strip-shaped sampling port is formed on the side wall of the outer cylinder. The outer cylinder is vertically welded on the column part. A conical part is also fixedly arranged at the lower end of the column part. An inner cylinder is sleeved in the outer cylinder. A second strip-shaped sampling port is formed on the side wall of the inner cylinder. The first strip-shaped sampling port corresponds to the second strip-shaped sampling port before the outer cylinder is inserted into the soil. The inner cylinder is inserted into the notch of the outer cylinder before sampling, so that the sampling port is in an open state, and the inner cylinder is prevented from rotating and closing the sampling port during insertion into the soil. The conical part and the column part with external threads are arranged on the sampling device to facilitate the insertion of the outer cylinder into the soil. After insertion into the soil, the inner cylinder is rotated to separate the notch, so that the soil is in a closed space to prevent the loss of soil samples when the outer cylinder is pulled out.

[0004] Although the device can prevent soil sample loss when the outer cylinder is pulled out after sampling, it relies on manual operation to insert into the soil and pull out from the soil. In the case of sampling hard soil or soil that needs to be inserted into a deeper layer, the process of manually inserting the device into the soil and pulling it out of the soil is laborious and inefficient. SUMMARY

[0005] The present application provides a soil environment detection sampling device to solve the technical problems of relying on manual operation to insert the soil sampling device into the soil or pull it out of the soil, which is laborious and inefficient in the operation process.

[0006] To solve the above problems, the soil environment detection sampling device provided by the present application adopts the following technical scheme:

[0007] A soil environment detection sampling device, comprising:

[0008] A sampling cylinder with an open bottom and a hollow interior.

[0009] Also included are:

[0010] A support, a vertically extending insertion rod for inserting into the soil body is installed at the bottom of the support;

[0011] A lifting drive mechanism is installed above the support, and has a lifting output end capable of reciprocating up and down;

[0012] A connecting assembly is installed on the lifting output end of the lifting drive mechanism, and has a connecting state one and a connecting state two after rotating 180 degrees around a horizontal axis on the lifting output end of the lifting drive mechanism;

[0013] The connecting assembly includes an inner sleeve for sleeving outside the sampling cylinder, and a plurality of grooves extending in a direction parallel to the axis of the inner sleeve are uniformly distributed on the inner side wall of the inner sleeve. An inclined slide is provided on the groove side wall, and a ball is provided in the groove and cooperates with the slide and can roll along the extension direction of the slide. The ball partially extends outside the groove and is pressed on the sampling cylinder;

[0014] When the connecting assembly is in the connecting state one, the ball is pressed on the sampling cylinder and moves downward with the sampling cylinder when the inner sleeve is driven to move downward, and the ball releases the sampling cylinder when the inner sleeve is driven to move upward;

[0015] When the connecting assembly is in the connecting state two, the ball is pressed on the sampling cylinder and moves upward with the sampling cylinder when the inner sleeve is driven to move upward, and the ball releases the sampling cylinder when the inner sleeve is driven to move downward.

[0016] With the above technical scheme, when the connecting assembly is in the connecting state one, the lifting drive mechanism drives the connecting assembly to move downward, the ball is pressed on the outside of the sampling cylinder, and the ball and the inner sleeve drive the sampling cylinder to move downward, the sampling cylinder is inserted into the ground, the lifting drive mechanism drives the connecting assembly to move upward, the ball releases the sampling cylinder, the sampling cylinder does not move upward with the ball and the inner sleeve, the lifting drive mechanism drives the inner sleeve to reciprocate, and the sampling cylinder is gradually inserted into a deeper place below the ground, so that the soil enters the cavity inside the sampling cylinder. When pulling out the sampling cylinder, first make the lifting drive mechanism drive the connecting assembly upward to make the inner sleeve away from the sampling cylinder, then adjust the connecting assembly to the connecting state two, and then make the lifting drive mechanism drive the connecting assembly to reciprocate up and down. When the inner sleeve moves upward, the ball is pressed on the sampling cylinder, the ball and the inner sleeve drive the sampling cylinder to move upward, when the inner sleeve moves downward, the ball releases the sampling cylinder, and the sampling cylinder will not be driven to move downward. The lifting drive mechanism drives the inner sleeve to reciprocate, and the sampling cylinder is gradually pulled out from the ground.

[0017] The lifting driving mechanism is used to complete the insertion and extraction of the sampling cylinder into the underground, which is more labor-saving and efficient than manually applying external force to the sampling cylinder to insert and extract the sampling cylinder into the underground, and the sampling cylinder can be inserted into the deeper underground for sampling. By arranging the inner sleeve and the ball in the connecting assembly, the lifting movement stroke of the lifting driving mechanism can be compressed, and the lifting driving mechanism can be reciprocatingly lifted in a short distance to realize the insertion or extraction of the sampling cylinder in a longer distance, so that the height dimension of the lifting driving mechanism can be limited, the device volume is smaller, and the device is more convenient to carry and carry.

[0018] Further, the inner sleeve rotation-stopping sleeve is arranged outside the sampling cylinder, the connecting assembly further comprises an outer sleeve, the outer sleeve is sleeved outside the inner sleeve and is in screw transmission cooperation with the inner sleeve, an elastic member capable of extending and contracting in the axial direction of the inner sleeve is connected between the outer sleeve and the inner sleeve, the outer sleeve is connected to the driving output end of the lifting driving mechanism and is rotation-stopping around the axis thereof, a locking structure is connected between the outer sleeve and the inner sleeve, the locking structure can keep the axial positions of the outer sleeve and the inner sleeve relatively fixed, an unlocking structure is arranged on the top of the sampling cylinder, the unlocking structure is in cooperation with the locking structure when the connecting assembly drives the sampling cylinder to move to the position corresponding to the locking structure, so as to unlock the locking structure, a stopping structure one is arranged on the bracket, and a stopping structure two is arranged on the sampling cylinder, the stopping structure one and the stopping structure two are in cooperation when the sampling cylinder moves downward to unlock the locking structure, so as to block the sampling cylinder from continuing to move downward.

[0019] By adopting the above technical scheme, when the inner sleeve is driven by the lifting driving mechanism to move up and down reciprocally and the sampling cylinder is inserted into the set position, the unlocking structure is unlocked, the stopping structure one and the stopping structure two are in blocking cooperation, and the sampling cylinder cannot continue to move downward, the inner sleeve and the outer sleeve can relatively slide in the axial direction, and when the outer sleeve moves downward, the inner sleeve is driven to rotate, the sampling cylinder is driven to rotate by the inner sleeve, and the rotating sampling cylinder can destroy the adhesion between the sampling cylinder and the soil, so that the subsequent process of extracting the sampling cylinder is more labor-saving.

[0020] Further, the locking structure comprises a locking rod elastically sliding along the radial direction of the inner sleeve and arranged on the inner sleeve and a locking hole arranged on the outer sleeve, and the unlocking structure is an unlocking clamping groove arranged on the outer side wall of the top of the sampling cylinder and extending along the axial direction of the sampling cylinder, when the locking rod is located below the unlocking clamping groove, the locking rod is inserted into the locking hole by being pushed outward by the outer side wall of the sampling cylinder, so as to realize the relative fixing of the inner sleeve and the outer sleeve in the axial direction, and when the locking rod moves to the unlocking clamping groove, the locking rod is inserted into the unlocking clamping groove under the elastic action, so as to drive the locking rod to be separated from the locking hole and realize the unlocking of the locking structure.

[0021] Further, the stop structure one is a stop block elastically sliding along the radial direction of the sampling cylinder and installed on the support, and the stop structure two is an annular groove opened on the outer sidewall of the sampling cylinder, the stop block is elastically pressed on the outer sidewall of the sampling cylinder, and when the sampling cylinder moves downward to the set position, the stop block is inserted into the annular groove to block the downward movement of the sampling cylinder.

[0022] Further, the driving output end of the lifting driving mechanism is connected with two vertical plate segments arranged in the horizontal direction, the outer sleeve and the inner sleeve are located between the two vertical plate segments, two elastic expansion rods are symmetrically arranged on the outer sidewall of the outer sleeve, the two elastic expansion rods are respectively arranged in the two vertical plate segments, the end of the elastic expansion rod away from the outer sleeve is connected with a clamping plate, and the two elastic expansion rods respectively apply elastic force to the two clamping plates towards the outer sleeve, so that the two clamping plates are respectively pressed on the two vertical plate segments.

[0023] By adopting the above technical scheme, the elastic expansion rod is used to realize the fixed connection between the connecting assembly and the vertical plate segment, and by lengthening the elastic expansion rod, the connecting assembly can be rotated to realize the 180-degree overturning of the connecting assembly.

[0024] Further, two positioning holes are opened on the vertical plate segment and symmetrically arranged on the two sides of the elastic expansion rod, and two positioning rods are symmetrically arranged on the clamping plate and on the two sides of the elastic expansion rod, and the two positioning rods are respectively inserted into the two positioning holes.

[0025] By adopting the above technical scheme, the positioning rods can position the elastic expansion rod and the connecting assembly, so that the axes of the outer sleeve and the inner sleeve can be kept vertical, and by arranging the positioning rods on the two sides of the elastic expansion rod, the connecting assembly can still be positioned after being overturned by 180 degrees.

[0026] Further, the end of the clamping plate away from the elastic expansion rod is connected with a pull ring.

[0027] By adopting the above technical scheme, the two clamping plates can be pulled to lengthen the elastic expansion rod.

[0028] Further, the sampling cylinder comprises a main body segment and a movable plate segment which are detachably connected, one half of the bottom of the main body segment is provided with a gap, the cross section of the movable plate segment is semicircular arc-shaped, and the movable plate segment can be spliced at the gap of the main body segment to combine with the main body segment into a cylindrical sampling cylinder.

[0029] By adopting the above technical scheme, the sampling cylinder is arranged in a detachable structure, and after sampling is completed, the sampling cylinder is detached to facilitate the taking out of the soil sample inside.

[0030] Further, the two side walls of the main body section facing the movable plate section are provided with insertion blocks / insertion slots, and the two side walls of the movable plate section facing the main body section are provided with corresponding insertion slots / insertion blocks, the main body section and the movable plate section are inserted and connected through the insertion slots and the insertion blocks, and the bottom outer side walls of the main body section and the movable plate section are each provided with a half-section matching external thread, and the bottom threaded sleeve of the main body section and the movable plate section is provided with a connecting sleeve.

[0031] By adopting the above technical scheme, the main body section and the movable plate section are inserted and connected, and the connecting and dismounting mode is simple and convenient.

[0032] Further, the inner side of the connecting sleeve is coaxially provided with an internal partition sleeve, the internal partition sleeve is spaced apart from the sampling cylinder, the bottom end of the internal partition sleeve is connected with an annular connecting base, and the bottom end of the annular connecting base is in an inverted conical shape.

[0033] By adopting the above technical scheme, the internal partition sleeve is arranged in the connecting sleeve, the internal partition sleeve is spaced apart from the sampling cylinder, a disposable plastic sampling cylinder can be inserted in the sampling cylinder, the bottom end of the plastic sampling cylinder is inserted in the space between the sampling cylinder and the internal partition sleeve, the plastic sampling cylinder is fixed, and the plastic sampling cylinder is used for sampling, so that the soil sample is prevented from being polluted in the multiple sampling process.

[0034] The sampling device for soil environment detection provided by the application has the beneficial effects that: the sampling cylinder can be automatically inserted into the ground and automatically pulled out of the ground through the lifting driving mechanism and the connecting assembly, manpower is saved, and the sampling efficiency is improved, and the sampling cylinder can be automatically driven to rotate before being pulled out of the ground, so that the process of pulling out the sampling cylinder is more labor-saving. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 A perspective view of the sampling device for soil environment detection provided by the application is shown in the figure;

[0036] Figure 2 A front view of the sampling device for soil environment detection provided by the application is shown in the figure;

[0037] Figure 3 A perspective view of the sampling device for soil environment detection provided by the application is shown in the figure; Figure 2 An enlarged view of the structure at A in the figure;

[0038] Figure 4 A left view of the sampling device for soil environment detection provided by the application is shown in the figure;

[0039] Figure 5 A top view of the sampling device for soil environment detection provided by the application is shown in the figure;

[0040] Figure 6A sectional view at the connecting assembly in the sampling device for soil environment detection provided by the present application;

[0041] Figure 7 Another view of a sectional view at the connecting assembly in the sampling device for soil environment detection provided by the present application;

[0042] Figure 8 A sectional view at the connecting assembly in the sampling device for soil environment detection provided by the present application; Figure 7 An enlarged structural schematic view at B in the middle;

[0043] Figure 9 A perspective structural schematic view of the outer sleeve in the sampling device for soil environment detection provided by the present application;

[0044] Figure 10 A perspective structural schematic view of the inner sleeve in the sampling device for soil environment detection provided by the present application;

[0045] Figure 11 A front view of the sampling cylinder in the sampling device for soil environment detection provided by the present application;

[0046] Figure 12 A top view of the sampling cylinder in the sampling device for soil environment detection provided by the present application;

[0047] Figure 13 A perspective structural schematic view of the main body section in the sampling device for soil environment detection provided by the present application;

[0048] Figure 14 A perspective structural schematic view of the movable plate section in the sampling device for soil environment detection provided by the present application;

[0049] Figure 15 A sectional view of the bottom of the sampling cylinder in the sampling device for soil environment detection provided by the present application.

[0050] BRIEF DESCRIPTION OF THE DRAWINGS

[0051] 1, horizontal support plate; 2, horizontal connecting rod; 3, insertion rod; 4, lifting cylinder; 5, support plate; 501, horizontal plate section; 502, vertical plate section; 6, limiting plate; 7, sampling cylinder; 701, main body section; 702, movable plate section; 703, annular groove; 704, guide groove; 705, unlocking slot; 706, insertion slot one; 707, insertion slot two; 708, insertion protrusion one; 709, insertion protrusion two; 8, outer sleeve; 801, spiral groove; 802, mounting block two; 9, extension sleeve; 10, connecting rod; 101, connecting groove; 102, limiting groove; 11, clamping plate; 12, pull ring; 13, inner sleeve; 131, groove; 132, sliding groove; 133, guide vertical rib; 134, matching block; 135, mounting block one; 14, connecting sleeve; 15, fixed plate; 16, guide rod; 17, elastic member four; 18, stop block; 19, ball; 20, elastic member two; 21, circular ring plate; 22, sliding rod; 23, elastic member three; 24, inner spacer; 25, annular connecting base; 26, locking rod; 27, elastic member one; 28, insertion block; 29, positioning rod. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be known by those skilled in the art that the embodiments described below are a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0053] The following is one of the embodiments of the sampling device for soil environment detection provided by the present application:

[0054] As shown in the drawings, Figures 1-15 A sampling device for soil environment detection comprises a support, a lifting driving mechanism, a connecting assembly and a sampling cylinder 7.

[0055] As shown in the drawings, Figure 1 The support comprises two horizontal support plates 1, two horizontal connecting rods 2 and a limiting plate 6.

[0056] The two horizontal support plates 1 are distributed at intervals left and right, and the two horizontal connecting rods 2 are both extended along the left-right direction. One of the two horizontal connecting rods 2 is connected between the front ends of the two horizontal support plates 1, and the other is connected between the rear ends of the two horizontal support plates 1. The two horizontal support plates 1 are connected into one body through the two horizontal connecting rods 2. The bottom of each horizontal support plate 1 is vertically connected with four insertion rods 3, which are distributed at the four corners of the horizontal support plate 1. The bottom end of the insertion rod 3 is inverted conical. The insertion rod 3 is used to be inserted into the soil body, so as to fix the support on the ground of the sampling area.

[0057] The limiting plate 6 is shaped like a "Z". The limiting plate 6 is located between two horizontal support plates 1, and the front and rear ends of the limiting plate 6 are respectively connected to two horizontal connecting rods 2. A circular limiting hole is opened in the middle of the limiting plate 6.

[0058] The lifting drive mechanism includes two lifting cylinders 4, which are respectively mounted on two horizontal support plates 1. Each lifting cylinder 4 has a lifting output end capable of reciprocating up and down. An L-shaped support plate 5 is connected to the lifting output end of each lifting cylinder 4. The support plate 5 includes a horizontal plate segment 501 and a vertical plate segment 502. The horizontal plate segment 501 is connected to the lifting output end of the lifting cylinder 4, and both vertical plate segments 502 are located on the side facing the other support plate 5. Each vertical plate segment 502 has a circular through-hole extending from left to right, and a positioning hole is provided on each side of the through-hole.

[0059] like Figure 6 , Figure 7 , Figure 9 , Figure 10 As shown, the connecting assembly includes an inner sleeve 13 and an outer sleeve 8. Four grooves 131 are evenly distributed on the inner sidewall of the inner sleeve 13, extending parallel to the axis of the inner sleeve 13 and penetrating the inner sleeve 13. The cross-section of the grooves 131 is square. Sliding grooves 132 are symmetrically provided on the two oppositely arranged groove sidewalls of the grooves 131. The sliding grooves 132 are arranged at an inclination relative to the axis of the inner sleeve 13. The distance between the first end of the sliding groove 132 and the inner sidewall of the inner sleeve 13 is greater than the distance between the second end of the sliding groove 132 and the inner sidewall of the inner sleeve 13.

[0060] Each of the aforementioned grooves 131 contains a cylindrical ball bearing 19. The axis of the ball bearing 19 extends horizontally, and a shaft segment is coaxially connected to both sides of the ball bearing 19. The two shaft segments are respectively inserted into the sliding grooves 132 on two oppositely arranged sidewalls of the groove 131, so that the ball bearing 19 can roll along the extending direction of the sliding groove 132. When the ball bearing 19 moves to the first end of the sliding groove 132, the outer sidewall of the ball bearing 19 slightly protrudes from the inner sidewall of the inner sleeve 13.

[0061] Two mounting blocks 135 are provided on the top end face of the inner sleeve 13, and the two mounting blocks 135 are arranged opposite each other on both sides of the axis of the inner sleeve 13.

[0062] The outer sleeve 8 is fitted onto the outside of the inner sleeve 13, such as... Figure 9 , Figure 10 As shown, a spiral groove 801 is provided on the inner side wall of the outer sleeve 8, and a mating block 134 is provided on the outer side wall of the inner sleeve 13. The mating block 134 is inserted into the spiral groove 801 so that the outer sleeve 8 and the inner sleeve 13 are engaged in spiral transmission.

[0063] Two mounting blocks two 802 are arranged on the top end surface of the outer sleeve 8, and the mounting blocks two 802 are arranged opposite to each other on both sides of the axis of the outer sleeve 8. When the end surface of the outer sleeve 8 is flush with the end surface of the inner sleeve 13, the mounting blocks two 802 are in position corresponding to the mounting blocks one 135.

[0064] As shown in Figure 6 , Figure 7 , Figure 8 , the bottom end of the outer sleeve 8 is coaxially connected with an extension sleeve 9. The inner side of the bottom end of the extension sleeve 9 is connected with a circular ring plate 21. The circular ring plate 21 is connected with the inner sleeve 13 through an elastic member two 20. The elastic member two 20 is a tension spring and is coaxially arranged inside the extension sleeve 9.

[0065] As shown in Figure 8 , the outer sleeve 8 and the inner sleeve 13 are connected with a locking structure. The locking structure includes a locking rod 26 and a locking hole. As shown in Figure 7 , the locking rod 26 extends along the radial direction of the inner sleeve 13 and slides along the radial direction of the inner sleeve 13 and is arranged in the mounting blocks one 135. The end of the locking rod 26 away from the mounting plate two is connected with a plug block 28. The plug block 28 is connected with the mounting blocks one 135 through an elastic member one 27. The locking hole is arranged in the mounting blocks two 802. The inner diameter of the locking hole is slightly larger than the outer diameter of the locking rod 26. The end of the locking rod 26 towards the mounting plate two is tapered. When the locking rod 26 is subjected to a pushing force away from the inner sleeve 13, the locking rod 26 can move towards the mounting blocks two 802 and be inserted into the locking hole, so that the outer sleeve 8 and the inner sleeve 13 are fixed in position in the axial direction.

[0066] As shown in Figure 6 , the outer side wall of the outer sleeve 8 is symmetrically connected with two elastic expansion rods. The elastic expansion rods include connecting rods 10, sliding rods 22 and elastic members three 23. The connecting rods 10 are connected to the outer side wall of the outer sleeve 8. The two connecting rods 10 are respectively arranged in the through holes of the two vertical plate segments 502. The connecting rods 10 are provided with connecting grooves 101 with circular cross sections and openings facing away from the outer sleeve 8. The groove side walls of the connecting grooves 101 are provided with two limit grooves 102 arranged opposite to each other.

[0067] The sliding rods 22 are inserted into the connecting grooves 101. The sliding rods 22 include rod segments in cylindrical shape and two limit edges arranged opposite to each other and connected to the outer side walls of the rod segments. The two limit edges are respectively inserted into the two limit grooves 102, so that the sliding rods 22 and the connecting rods 10 are connected together in sliding and interlocking manner. The sliding rods 22 and the groove bottom surfaces of the connecting grooves 101 are connected with the elastic members three 23. The elastic members three 23 are tension springs capable of expanding and contracting along the extension direction of the connecting grooves 101.

[0068] As shown in Figure 1 ,Figure 2 , Figure 6 As shown, a retaining plate 11 is connected to one end of the sliding rod 22 facing away from the elastic element 23. The outer diameter of the retaining plate 11 is larger than that of the connecting rod 10. The retaining plate 11 is located on the side of the vertical plate section 502 facing away from the connecting rod 10. Two positioning rods 29 are vertically connected to the side of the retaining plate 11 facing the connecting rod 10. The two positioning rods 29 are respectively located on the front and rear sides of the sliding rod 22. The two positioning rods 29 are respectively inserted into the two positioning holes on the vertical plate section 502.

[0069] A semi-circular pull ring 12 is connected to the side of the card plate 11 facing away from the connecting rod 10. By pulling the pull rings 12 on both sides away from each other, the positioning rod 29 can be moved away from the positioning hole. Then, by pulling the pull ring 12, the elastic telescopic rod can be rotated 180 degrees with the connecting component. Then, by releasing the pull ring 12, the rotated positioning rod 29 can be inserted back into the positioning hole, thus achieving a 180-degree rotation of the connecting component.

[0070] like Figures 11-15 As shown, the sampling cylinder 7 is a cylindrical structure with an open bottom and a hollow interior. The sampling cylinder 7 includes a main body section 701 and a movable plate section 702. The top outer wall of the main body section 701 is provided with two oppositely arranged strip-shaped unlocking slots 705, both of which extend in a direction parallel to the axis of the sampling cylinder 7. The unlocking slots 705 form the unlocking structure on the sampling cylinder 7. When the insert 28 at the end of the locking rod 26 abuts against the part of the sampling cylinder 7 located below the unlocking slot 705, the locking rod 26 is inserted into the locking hole. When the insert 28 moves into the unlocking slot 705, the locking rod 26 disengages from the locking hole, thereby unlocking the outer sleeve 8 from the inner sleeve 13.

[0071] The bottom half of the main body segment 701 has a notch. The two side walls of the notch in the main body segment 701 have elongated insertion grooves 706, and the top side wall of the notch has an arc-shaped insertion groove 707. The movable plate segment 702 has a semi-circular cross-section, and its shape matches the shape of the notch. The two narrow side walls of the movable plate segment 702 each have elongated insertion protrusions 708, and the top arc-shaped side wall of the movable plate segment 702 has an insertion protrusion 709 that matches the insertion groove 707.

[0072] The outer wall of the main body section 701 is also provided with a second blocking structure, which is a ring-shaped groove 703 located between the unlocking slot 705 and the notch. Figure 3As shown, the top of the limiting plate 6 is symmetrically provided with two fixed plates 15 on both sides of the limiting hole, a guide rod 16 is arranged in the fixed plate 15, the end of the guide rod 16 towards the limiting hole is connected with a stop block 18, the bottom end of the stop block 18 is provided with a pushing inclined surface, the stop block 18 is connected with the elastic member four 17 between the fixed plate 15, the stop block 18 is inserted into the annular groove 703, and the upper and lower stop cooperation between the sampling cylinder 7 and the support is realized.

[0073] The two insertion protrusions on the movable plate segment 702 are respectively inserted into the insertion slot one 706 in the main body segment 701, and the insertion protrusion two 709 is inserted into the insertion slot two 707, so that the movable plate segment 702 and the main body segment 701 are spliced into one body.

[0074] The bottom outer side wall of the main body segment 701 and the movable plate segment 702 is respectively provided with a half outer thread, when the main body segment 701 and the movable plate segment 702 are spliced together, the half outer threads on both sides are spliced into a complete thread, the outer thread at the bottom end of the main body segment 701 and the movable plate segment 702 is screwed with a connecting sleeve 14, and the connecting sleeve 14 connects the main body segment 701 and the movable plate segment 702 into a complete sampling cylinder 7.

[0075] The outer side wall of the complete sampling cylinder 7 is provided with two guide grooves 704 distributed at an angle of 90 degrees, and the two guide grooves 704 pass through the sampling cylinder 7. The inner side wall of the inner sleeve 13 is also provided with two guide vertical ribs 133 distributed at an angle of 90 degrees, when the sampling cylinder 7 is arranged in the inner sleeve 13, the two guide vertical ribs 133 are correspondingly arranged in the two guide grooves 704, so that the sampling cylinder 7 and the inner sleeve 13 are relatively stopped from rotating.

[0076] As shown in the drawings, Figure 15 The inner side of the connecting sleeve 14 is coaxially provided with an inner partition sleeve 24, the bottom end of the inner partition sleeve 24 is connected with the bottom end of the connecting sleeve 14, the bottom end of the annular connecting base 25 is inverted conical, so as to be inserted into the ground. The inner partition sleeve 24 is spaced from the sampling cylinder 7, when in use, a disposable plastic sleeve can be arranged in the sampling cylinder 7, the bottom end of the plastic sleeve is inserted into the space between the inner partition sleeve 24 and the bottom of the sampling cylinder 7, and is clamped by the inner partition sleeve 24 and the bottom of the sampling cylinder 7, so as to realize the fixation of the plastic sleeve in the sampling cylinder 7.

[0077] In use, first select the need to sample the plot, the rod 3 is inserted into the ground to fix the bracket at the plot. The main section 701 and movable plate section 702 are inserted together to form a complete sampling cylinder 7, the guide slot 704 on the sampling cylinder 7 is aligned with the guide vertical edge 133, the sampling cylinder 7 is arranged in the inner sleeve 13, the two blocks 18 are pulled away from each other, the bottom of the sampling cylinder 7 passes through the limiting hole on the limiting plate 6, then the connecting sleeve 14 is screwed on the bottom end of the sampling cylinder 7 with the inner sleeve 24, the main section 701 and the movable plate section 702 are fixed as a whole.

[0078] Then the bottom end of the sampling cylinder 7 is inserted into the ground, the locking rod 26 is blocked in the locking hole by the outer wall of the sampling cylinder 7, and the outer sleeve 8 is axially fixed with the inner sleeve 13. Start the lifting drive cylinder, the lifting output end of the lifting drive cylinder moves up and down, when the connecting assembly is driven to move downward, the outer sleeve 8 drives the inner sleeve 13 to move downward synchronously, when the inner sleeve 13 moves downward, the ball 19 rolls on the outer wall of the sampling cylinder 7 and moves towards the second end of the chute 132, the ball 19 is pressed on the sampling cylinder 7, the sampling cylinder 7 is driven by the ball 19 and the inner sleeve 13 to move downward, so that the sampling cylinder 7 is inserted into the ground, when the connecting assembly is driven to move upward, the ball 19 moves along the chute 132 towards the first end of the chute 132, the ball 19 releases the sampling cylinder 7, the sampling cylinder 7 will not be driven by the ball 19 and the inner sleeve 13 to move upward, therefore, the sampling cylinder 7 is gradually inserted into the ground during the up and down reciprocating movement of the connecting assembly.

[0079] When the sampling cylinder 7 moves downward to the position corresponding to the blocking block 18, the blocking block 18 is inserted into the annular groove 703 under the action of the elastic member 17, at the same time, the plug 28 is inserted into the unlocking slot 705, the locking rod 26 leaves the locking hole, the outer sleeve 8 and the inner sleeve 13 are unlocked, the position between the outer sleeve 8 and the inner sleeve 13 is no longer fixed, at this time the connecting assembly continues to be driven to move up and down, the outer sleeve 8 moves axially relative to the inner sleeve 13, the inner sleeve 13 is driven by the outer sleeve 8 to rotate, so that the soil inserted into the sampling cylinder 7 rotates relative to the remaining soil underground, so that the process of taking out the sampling cylinder 7 from the soil body becomes easier.

[0080] After the sampling cylinder 7 is properly rotated, the lifting output end of the lifting driving cylinder is no longer moved up and down, the lifting driving cylinder drives the connecting assembly to move upward to a higher position, the connecting assembly is separated from the sampling cylinder 7, then the two pull rings 12 are pulled away from each other, the positioning rod 29 is away from the positioning hole, the two pull rings 12 are rotated by 180 degrees, the connecting assembly is rotated by 180 degrees, the pull ring 12 is loosened, the positioning rod 29 is inserted into the positioning hole, and the connecting assembly is fixed on the lifting output end of the lifting driving cylinder again.

[0081] The inner sleeve 13 is aligned with the sampling cylinder 7, the lifting driving cylinder drives the connecting assembly to move downward to the position for reciprocating lifting movement, the lifting driving cylinder drives the connecting assembly to move up and down again, when the inner sleeve 13 is driven to move downward, the ball 19 loosens the sampling cylinder 7, the sampling cylinder 7 is not driven to move downward, when the inner sleeve 13 moves upward, the ball 19 is pressed against the sampling cylinder 7, the sampling cylinder 7 is driven to move upward by the ball 19 and the inner sleeve 13, with the reciprocating movement of the inner sleeve 13, the sampling cylinder 7 is gradually pulled out of the ground. When the bottom end of the sampling cylinder 7 moves above the ground, the connecting sleeve 14 is unscrewed from the bottom of the sampling cylinder 7, then the main body section 701 and the movable plate section 702 are held, the sampling cylinder 7 is taken out of the connecting assembly, the sampling is completed, then the main body section 701 and the movable plate section 702 are disassembled, and the soil sample can be taken out.

[0082] The sampling cylinder 7 can be automatically inserted into the ground and pulled out of the ground after sampling, manpower can be saved, deeper soil can be sampled, and sampling efficiency can be improved.

Claims

1. A sampling device for soil environment detection, comprising: a sampling cylinder, open at the bottom end, hollow inside; characterized in that it further comprises: a support, the bottom of which is provided with a vertically extending insertion rod for insertion into the soil body; a lifting driving mechanism, installed above the support, having a lifting output end capable of reciprocating up and down; a connecting assembly, installed on the lifting output end of the lifting driving mechanism, and having a connecting state one and a connecting state two after rotating 180 degrees around a horizontal axis on the lifting output end of the lifting driving mechanism; the connecting assembly comprises an inner sleeve, which is used to be sleeved outside the sampling cylinder, the inner side wall of the inner sleeve is uniformly provided with a plurality of grooves extending in the direction parallel to the axis of the inner sleeve, the groove side wall is provided with an inclined slide, and the groove is provided with a ball, which cooperates with the slide and can roll along the extension direction of the slide, and the ball partially extends outside the groove and can be pressed on the sampling cylinder; when the connecting assembly is in the connecting state one, the ball is pressed on the sampling cylinder when the inner sleeve is driven to move downward, thereby moving the sampling cylinder downward, and the ball releases the sampling cylinder when the inner sleeve is driven to move upward; when the connecting assembly is in the connecting state two, the ball is pressed on the sampling cylinder when the inner sleeve is driven to move upward, thereby moving the sampling cylinder upward, and the ball releases the sampling cylinder when the inner sleeve is driven to move downward; the inner sleeve is sleeved outside the sampling cylinder and is rotationally connected with the sampling cylinder, the connecting assembly further comprises an outer sleeve, which is sleeved outside the inner sleeve and cooperates with the inner sleeve through a screw transmission, an elastic member capable of extending and contracting in the axial direction of the inner sleeve is connected between the outer sleeve and the inner sleeve, the outer sleeve is rotationally connected with the driving output end of the lifting driving mechanism around its axis, a locking structure is connected between the outer sleeve and the inner sleeve, which can keep the axial positions of the outer sleeve and the inner sleeve relatively fixed, an unlocking structure is provided on the top of the sampling cylinder, which cooperates with the locking structure when the sampling cylinder is moved to the position corresponding to the locking structure by the connecting assembly, so as to unlock the locking structure, a stop structure one is provided on the support, and a stop structure two is provided on the sampling cylinder, the stop structure one cooperates with the stop structure two when the sampling cylinder moves downward to unlock the locking structure, thereby blocking the sampling cylinder from continuing to move downward, after the locking structure is unlocked, the inner sleeve and the outer sleeve can relatively slide in the axial direction, the outer sleeve moves downward, which causes the inner sleeve to rotate, and the inner sleeve causes the sampling cylinder to rotate.

2. The sampling device for detecting soil environment according to claim 1, wherein the locking structure comprises a locking rod elastically sliding in the radial direction of the inner sleeve and penetrating into the inner sleeve, and a locking hole opened in the outer sleeve, the unlocking structure is an unlocking clamping groove opened in the outer side wall of the top of the sampling cylinder and extending in the direction parallel to the axis of the sampling cylinder; when the locking rod is located below the unlocking clamping groove in the sampling cylinder, it is inserted into the locking hole by being pushed outward by the outer side wall of the sampling cylinder, thereby realizing the relative fixation of the inner sleeve and the outer sleeve in the axial direction, when the locking rod moves to the unlocking clamping groove, it can be inserted into the unlocking clamping groove under the elastic action, thereby driving the locking rod to separate from the locking hole and unlocking the locking structure.

3. The sampling device for detecting soil environment according to claim 1, wherein The first stop structure is a stop block elastically slidingly installed on the support along the radial direction of the sampling cylinder, and the second stop structure is an annular groove formed on the outer sidewall of the sampling cylinder and extending along the radial direction of the sampling cylinder, and the stop block is elastically pressed on the outer sidewall of the sampling cylinder; when the sampling cylinder moves downward to the set position, the stop block is inserted into the annular groove to block the downward movement of the sampling cylinder.

4. The sampling device for detecting soil environment according to claim 1, wherein The driving output end of the lifting driving mechanism is connected with two vertical plate segments arranged in the horizontal direction, the outer sleeve and the inner sleeve are located between the two vertical plate segments, two elastic expansion rods are symmetrically arranged on the outer sidewall of the outer sleeve, the two elastic expansion rods are respectively arranged in the two vertical plate segments, one end of the elastic expansion rod away from the outer sleeve is connected with a clamping plate, and the two elastic expansion rods respectively apply elastic force to the two clamping plates in the direction of the outer sleeve, so that the two clamping plates are respectively pressed on the two vertical plate segments.

5. The sampling device for detecting soil environment according to claim 4, wherein Two positioning holes are formed on the vertical plate segment and symmetrically arranged on both sides of the elastic expansion rod, two positioning rods are symmetrically arranged on the clamping plate and on both sides of the elastic expansion rod, and the two positioning rods are respectively inserted into the two positioning holes.

6. The sampling device for detecting soil environment according to claim 5, wherein One end of the clamping plate away from the elastic expansion rod is connected with a pull ring.

7. The sampling device for detecting soil environment according to claim 1 or 2, wherein The sampling cylinder comprises a main body segment and a movable plate segment, one side of the bottom of the main body segment is provided with a notch, the cross section of the movable plate segment is semicircular, the movable plate segment can be connected at the notch of the main body segment to form a cylindrical sampling cylinder, and the main body segment and the movable plate segment are detachably connected.

8. The sampling device for detecting soil environment according to claim 7, wherein Two side walls of the main body segment facing the movable plate segment are provided with insertion blocks or insertion grooves, two side walls of the movable plate segment facing the main body segment are provided with corresponding insertion grooves or insertion blocks, the main body segment and the movable plate segment are connected through the insertion grooves and the insertion blocks, the bottom outer sidewall of the main body segment and the movable plate segment is respectively provided with a half segment of external thread matched with each other, and a connecting sleeve is arranged on the bottom threads of the main body segment and the movable plate segment.

9. The sampling device for detecting soil environment according to claim 8, wherein The inner side of the connecting sleeve is coaxially provided with an inner spacer, the inner spacer is spaced apart from the sampling cylinder, and the inner spacer and the bottom end of the connecting sleeve are connected with an annular connecting base, and the bottom end of the annular connecting base is in an inverted conical shape.

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