CN219830346U

CN219830346U - Sectional soil sampler

Info

Publication number: CN219830346U
Application number: CN202223595646.8U
Authority: CN
Inventors: 张启发; 柴英亮; 刘峰; 周娟艳; 郭伟
Original assignee: Hebei Chengrui Environmental Protection Group Co ltd
Current assignee: Hebei Chengrui Environmental Protection Group Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-10-13
Anticipated expiration: 2032-12-30

Abstract

The utility model provides a sectional soil sampler which comprises a fixed sleeve, a soil sampling cylinder and a driving rod, wherein a first thread is arranged on the inner wall of the fixed sleeve; the soil taking cylinder comprises a plurality of soil taking sub-cylinders which are detachably arranged, the outer wall of the soil taking sub-cylinders is provided with second threads, and the first threads are matched with the second threads, so that the soil taking sub-cylinders can be screwed in the fixed sleeve; the driving rod can be detachably arranged at the top of the soil taking cylinder, and a grip is arranged at the top of the driving rod. According to the sectional type soil sampler, the soil sampling cylinder comprises the soil sampling sub-cylinders, after soil sampling of the soil sampling cylinder is completed, the soil sampling sub-cylinders are separated, and the sampled core is divided into a plurality of sections, so that the core is completely sampled, and the core is protected from being damaged.

Description

Sectional soil sampler

Technical Field

The utility model belongs to the technical field of environmental protection equipment, and particularly relates to a sectional type soil sampler.

Background

Before the contaminated soil is restored, the soil in the contaminated area is often collected by a wire pair to analyze the type of contamination and the degree of contamination of the soil. In the prior art, a percussion drill is mostly adopted in soil sample collection to collect samples, and the soil is taken out from the ground by a drilling machine during sampling, and then the soil exists in a soil sampler. VOCs gathers at geotome lateral wall opening part, then knocks out soil from the geotome through hammering, and the rock core structure is destroyed this moment, will be from the soil that the geotome knocked out place the rock core pipe in, then heavy metal, SVOCs sample at the rock core pipe. Because the structure is destroyed when the core is knocked out from the geotome, the complete core cannot be obtained, and accurate layering cannot be carried out on the core.

Disclosure of Invention

The utility model aims to provide a sectional type soil sampler so as to solve the problem that the existing soil sampling equipment can damage a rock core when the rock core is taken out.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the sectional soil sampler comprises a fixed sleeve, a soil sampling cylinder and a driving rod, wherein a first thread is arranged on the inner wall of the fixed sleeve, a fixing piece is arranged on the fixed sleeve, and the fixing piece is detachably arranged on the ground; the soil taking cylinder comprises a plurality of soil taking sub-cylinders which are detachably arranged, a second thread is arranged on the outer wall of the soil taking sub-cylinder, and the first thread is matched with the second thread, so that the soil taking sub-cylinders can be screwed in the fixed sleeve; the driving rod is detachably arranged at the top of the soil sampling cylinder, and a grip is arranged at the top of the driving rod.

In one possible implementation manner, the fixing piece comprises two fixing plates, the two fixing plates are respectively arranged on two sides of the fixing sleeve, the fixing plates are welded and fixed on the soil taking cylinder, a plurality of limiting protrusions are arranged at the bottom of the fixing plates, and the limiting protrusions can be inserted into the ground under the action of external force.

In one possible implementation manner, the top of the fixing plate is provided with a vertical plate, the vertical plate is arranged at one end of the fixing plate far away from the fixing sleeve, the vertical plate vertically extends upwards, the top of the vertical plate is provided with a transverse plate, the transverse plate extends along the horizontal direction, and the other end of the transverse plate is fixed on the outer wall of the fixing sleeve relative to the end connected with the vertical plate.

In one possible implementation manner, a first connecting ring is arranged at the bottom of the soil sampling sub-cylinder, and a third thread is arranged on the outer wall of the first connecting ring; the top of the soil taking sub-cylinder is provided with a second connecting ring, the inner wall of the second connecting ring is provided with a fourth thread, the outer diameter of the first connecting ring is identical to the inner diameter of the second connecting ring, the third thread is matched with the fourth thread, and when two adjacent soil taking sub-cylinders are connected, one of the soil taking sub-cylinders is in threaded connection with the other soil taking sub-cylinder in the second connecting ring.

In one possible implementation manner, the first connecting ring is provided with a first connecting hole, the second connecting ring is provided with a second connecting hole, the diameters of the first connecting hole and the second connecting hole are the same, when two adjacent soil taking sub-cylinders are connected, the second connecting hole of the lower soil taking sub-cylinder corresponds to the first connecting holes one by one, and bolts penetrate through the second connecting holes and are screwed into the corresponding first connecting holes.

In one possible implementation manner, the soil sampling cylinder comprises a left sleeve and a right sleeve, wherein a first left connecting ring is arranged at the bottom of the left sleeve, and a second left connecting ring is arranged at the top of the left sleeve; the bottom of right telescopic is equipped with first right go-between, the top of right telescopic is equipped with the right go-between of second, left sleeve with right sleeve detains into the soil pick-up sub-section of thick bamboo, first left go-between with first right go-between detains into first go-between, the left go-between of second with the right go-between detains into the second go-between.

In one possible implementation manner, the height of the first left connecting ring is the same as the height of the first right connecting ring, the height of the second left connecting ring is the same as the height of the second right connecting ring, the height of the first left connecting ring is larger than the height of the second left connecting ring, the soil taking sub-cylinder further comprises a mounting ring, the mounting ring is in threaded connection with the first connecting ring, so that the left sleeve is the same as the right sleeve, and the height difference of the first left connecting ring and the second left connecting ring is the same as the height of the mounting ring.

In a possible implementation manner, the soil taking sub-cylinder is provided with a cutting groove, the cutting groove is formed in the bottom of the second connecting ring, the sectional type soil sampler further comprises a cutting plate, the length of the cutting groove is identical to the inner diameter of the soil taking sub-cylinder, the diameter of the cutting plate is identical to the inner diameter of the soil taking sub-cylinder, the cutting plate can be inserted into the soil taking sub-cylinder through the cutting groove, the cutting plate is circular, and one side of the cutting plate is provided with a pushing rod.

In one possible implementation manner, the bottom of the driving rod is provided with a connecting plate, the connecting plate is circular, the diameter of the connecting plate is the same as the inner diameter of the soil sampling barrel, a third connecting hole is formed in the side wall of the connecting plate, when the driving rod is connected to the soil sampling barrel, the connecting plate is inserted into the second connecting ring of the soil sampling sub-barrel at the top, and a bolt passes through the third connecting hole and is screwed into the corresponding second connecting hole.

In a possible implementation manner, the sectional type soil sampler further comprises a soil sampling knife, the soil sampling knife is annular, a fifth thread is arranged on the inner wall of the soil sampling knife, the fifth thread is matched with the third thread, a cutting edge is arranged at the bottom end of the soil sampling knife, a fourth connecting hole is formed in the soil sampling knife, when the soil sampling knife is installed on the soil sampling cylinder, the soil sampling knife is in threaded connection with the first connecting ring of the lowermost soil sampling sub-cylinder, and a bolt penetrates through the fourth connecting hole and is in threaded connection with the corresponding first connecting hole.

The sectional soil sampler provided by the utility model has the beneficial effects that: compared with the prior art, the soil sampling cylinder comprises a plurality of soil sampling sub-cylinders, after soil sampling of the soil sampling cylinder is completed, the sampled core is divided into a plurality of sections after the soil sampling sub-cylinders are separated, so that the core is completely sampled and protected from being damaged; and through set up detachable actuating lever on the soil sampling tube, can be convenient for the rotation of soil sampling tube, and then be convenient for take out soil, again because the detachable of actuating lever, can be convenient for sectional type soil sampler reduces occupation space when the transportation for sectional type soil sampler more portable uses.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a sectional soil sampler according to an embodiment of the present utility model;

fig. 2 is an enlarged view of a portion a of fig. 1;

fig. 3 is a schematic structural view of a soil sampling cylinder according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a soil sampling sub-cylinder according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of a cutting board according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a driving rod according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a soil sampling knife according to an embodiment of the present utility model.

Wherein, each reference sign is as follows in the figure:

1. a fixed sleeve; 2. a soil sampling cylinder; 3. a driving rod; 4. a soil sampling knife;

101. a fixing plate; 102. a limit protrusion; 103. a riser; 104. a cross plate;

201. taking a soil sub-cylinder; 202. a first connection ring; 203. a second connecting ring; 204. a first connection hole; 205. a second connection hole; 206. a left sleeve; 207. a right sleeve; 208. a first left connecting ring; 209. a first right connecting ring; 210. a second left connecting ring; 211. a second right connecting ring; 212. a mounting ring; 213. cutting off the groove; 214. cutting off the plate; 215. a push rod;

301. a grip; 302. a connecting plate; 303. a third connection hole;

401. a fourth connection hole; 402. and (3) cutting edges.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It should be further noted that the drawings and embodiments of the present utility model mainly describe the concept of the present utility model, and on the basis of the concept, some specific forms and arrangements of connection relations, position relations, power units, power supply systems, hydraulic systems, control systems, etc. may not be completely described, but those skilled in the art may implement the specific forms and arrangements described above in a well-known manner on the premise of understanding the concept of the present utility model.

When an element is referred to as being "fixed" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" means two or more, and the meaning of "a number" means one or more, unless specifically defined otherwise.

The sectional soil sampler provided by the utility model will now be described.

Referring to fig. 1 and 3, the segmented soil sampler includes a fixing sleeve 1, a soil sampling cylinder 2 and a driving rod 3, wherein a first thread is provided on an inner wall of the fixing sleeve 1, a fixing member is provided on the fixing sleeve 1, and the fixing member is detachably provided on the ground; the soil sampling cylinder 2 comprises a plurality of soil sampling sub-cylinders 201 which are detachably arranged, second threads are arranged on the outer wall of the soil sampling sub-cylinders 201, and the first threads are matched with the second threads, so that the soil sampling sub-cylinders 201 can be screwed in the fixed sleeve 1; the driving rod 3 is detachably arranged at the top of the soil sampling cylinder 2, and a grip 301 is arranged at the top of the driving rod 3.

The sectional type geotome that this embodiment provided's beneficial effect is: compared with the prior art, the sectional type soil sampler provided by the embodiment comprises a plurality of soil sampling sub-cylinders 201 by arranging the soil sampling cylinder 2, after the soil sampling of the soil sampling cylinder 2 is completed, the soil sampling sub-cylinders 201 are separated, and the sampled core is also divided into a plurality of sections so as to be completely sampled, and the core is protected from being damaged; and through set up detachable actuating lever 3 on the soil sampling section of thick bamboo 2, can be convenient for the rotation of soil sampling section of thick bamboo 2, and then be convenient for take out soil, again because the detachable of actuating lever 3, can be convenient for sectional type soil sampler reduces occupation space when the transportation for sectional type soil sampler more portable uses.

As shown in fig. 2, the fixing member includes two fixing plates 101, the two fixing plates 101 are separately disposed at two sides of the fixing sleeve 1, the fixing plates 101 are welded and fixed on the soil sampling tube 2, a plurality of limiting protrusions 102 are disposed at the bottom of the fixing plates 101, and the limiting protrusions 102 can be inserted into the ground under the action of external force. Through setting up fixed plate 101 and spacing arch 102, can conveniently fix fixed sleeve 1 subaerial, be convenient for get soil section of thick bamboo 2 and rotate for fixed sleeve 1, and then be convenient for get soil.

In addition, the top of the fixing plate 101 is provided with a vertical plate 103, the vertical plate 103 is arranged at one end of the fixing plate 101 far away from the fixing sleeve 1, the vertical plate 103 vertically extends upwards, the top of the vertical plate 103 is provided with a transverse plate 104, the transverse plate 104 extends along the horizontal direction, and the other end of the transverse plate 104 is fixed on the outer wall of the fixing sleeve 1 relative to one end connected with the vertical plate 103. Through setting up riser 103 and diaphragm 104, the operating personnel of being convenient for tramples fixed plate 101, the operating personnel of being convenient for operate actuating lever 3 drive soil taking section of thick bamboo 2 rotation to take out soil.

As shown in fig. 3 and 4, a first connecting ring 202 is arranged at the bottom of the soil sampling sub-cylinder 201, and a third thread is arranged on the outer wall of the first connecting ring 202; the top of the soil taking sub-cylinder 201 is provided with a second connecting ring 203, the inner wall of the second connecting ring 203 is provided with a fourth thread, the outer diameter of the first connecting ring 202 is the same as the inner diameter of the second connecting ring 203, the third thread is matched with the fourth thread, and when two adjacent soil taking sub-cylinders 201 are connected, the first connecting ring 202 of one soil taking sub-cylinder 201 is in threaded connection with the second connecting ring 203 of the other soil taking sub-cylinder 201. By arranging the first connecting ring 202 and the second connecting ring 203, the first connecting ring and the second connecting ring are matched with each other, so that adjacent soil taking sub-cylinders 201 are connected together, and the soil taking sub-cylinders 201 are combined into the soil taking cylinder 2.

As a preferred technical scheme, be equipped with first connecting hole 204 on the first go-between 202, be equipped with second connecting hole 205 on the second go-between 203, first connecting hole 204 is the same with second connecting hole 205 diameter, when two adjacent soil taking sub-drums 201 are connected, the second connecting hole 205 of lower soil taking sub-drum 201 and the first connecting hole 204 of soil taking sub-drum 201 one-to-one of top, the bolt passes second connecting hole 205 and the spiro union is in corresponding first connecting hole 204 for adjacent soil taking sub-drum 201 is fixed each other, when soil taking sub-drum 2 rotates down to remove and fetches earth, can not loosen between the adjacent soil taking sub-drum 201.

In addition, the soil sampling tube 2 comprises a left sleeve and a right sleeve 207, a first left connecting ring 208 is arranged at the bottom of the left sleeve 206, and a second left connecting ring 210 is arranged at the top of the left sleeve 206; the bottom of right sleeve 207 is equipped with first right go-between 209, and the top of right sleeve 207 is equipped with second right go-between 211, and left sleeve 206 and right sleeve 207 lock become and get soil sub-section of thick bamboo 201, and first left go-between 208 and first right go-between 209 are detained into first go-between 202, and second left go-between 210 and second right go-between 211 are detained into second go-between 203 for get soil sub-section of thick bamboo 201 can control the separation, be convenient for get the taking out of the rock core or the soil in the soil sub-section of thick bamboo 201, prevent to destroy soil or the rock core in the soil sub-section of thick bamboo 201.

As shown in fig. 4, the first left connecting ring 208 has the same height as the first right connecting ring 209, the second left connecting ring 210 has the same height as the second right connecting ring 211, the first left connecting ring 208 has a height greater than the second left connecting ring 210, the soil sampling sub-cylinder 201 further includes a mounting ring 212, the mounting ring 212 is screwed on the first connecting ring 202, so that the left sleeve 206 and the right sleeve 207 are the same, and the difference in height between the first left connecting ring 208 and the second left connecting ring 210 is the same as the mounting ring 212. The installation ring 212 prevents the left sleeve 206 and the head sleeve from being separated when the adjacent soil taking sub-cylinders 201 are separated, and further prevents the soil or the core in the soil taking sub-cylinders 201 from falling off and damaging.

As shown in fig. 4 and 5, the soil sampling barrel 201 is provided with a cutting groove 213, the cutting groove 213 is arranged at the bottom of the second connecting ring 203, the segmented soil sampling device further comprises a cutting plate 214, the length of the cutting groove 213 is the same as the inner diameter of the soil sampling barrel 201, the diameter of the cutting plate 214 is the same as the inner diameter of the soil sampling barrel 201, the cutting plate 214 can be inserted into the soil sampling barrel 201 through the cutting groove 213, the cutting plate 214 is circular, and one side of the cutting plate 214 is provided with a pushing rod 215. The provision of the cutting groove 213 and the cutting plate 214 enables the core or soil in the soil taking barrel 2 to be cut, preventing the adjacent soil taking sub-barrels 201 from damaging the soil structure in the soil taking sub-barrels 201 due to rotation when they are separated.

As shown in fig. 6, a connecting plate 302 is arranged at the bottom of the driving rod 3, the connecting plate 302 is circular, the diameter of the connecting plate 302 is the same as the inner diameter of the soil sampling tube 2, a third connecting hole 303 is arranged on the side wall of the connecting plate 302, when the driving rod 3 is connected to the soil sampling tube 2, the connecting plate 302 is inserted into the second connecting ring 203 of the soil sampling sub-tube 201 at the top, and a bolt passes through the third connecting hole 303 and is screwed into the corresponding second connecting hole 205. The arrangement of the connection plate 302 and the third connection hole 303 facilitates the fixing of the driving rod to the soil sampling tube 2 on the one hand and also prevents loosening of the connection between the soil sampling tube 2 and the driving rod 3 when the soil sampling tube 2 is rotated on the other hand.

Finally, as shown in fig. 7, the sectional type soil sampler further comprises a soil sampling knife 4, the soil sampling knife 4 is annular, a fifth thread is arranged on the inner wall of the soil sampling knife 4, the fifth thread is matched with the third thread, a cutting edge 402 is arranged at the bottom end of the soil sampling knife 4, a fourth connecting hole 401 is formed in the soil sampling knife 4, when the soil sampling knife 4 is installed on the soil sampling cylinder 2, the soil sampling knife 4 is in threaded connection with the first connecting ring 202 of the lowest soil sampling sub-cylinder 201, and a bolt passes through the fourth connecting hole 401 and is in threaded connection with the corresponding first connecting hole 204. The setting of the soil sampling knife 4 can reduce the frictional force between the bottom end of the soil sampling tube 2 and the soil, and is convenient for the soil sampling of the soil sampling tube 2.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. A segmented geotome, comprising:

the fixed sleeve (1) is provided with first threads on the inner wall, the fixed sleeve (1) is provided with a fixed piece, and the fixed piece is detachably arranged on the ground;

the soil taking cylinder (2) comprises a plurality of soil taking sub-cylinders (201) which are detachably arranged, wherein second threads are arranged on the outer wall of the soil taking sub-cylinders (201), and the first threads are matched with the second threads so that the soil taking sub-cylinders (201) can be in threaded connection with the fixing sleeve (1);

the driving rod (3) is detachably arranged at the top of the soil sampling cylinder (2), and a grip (301) is arranged at the top of the driving rod (3).

2. The segmented geotome of claim 1, wherein: the fixing piece comprises two fixing plates (101), the two fixing plates (101) are respectively arranged on two sides of the fixing sleeve (1), the fixing plates (101) are welded and fixed on the soil taking barrel (2), a plurality of limiting protrusions (102) are arranged at the bottom of the fixing plates (101), and the limiting protrusions (102) can be inserted into the ground under the action of external force.

3. The segmented geotome of claim 2, wherein: the top of fixed plate (101) is equipped with riser (103), riser (103) are located the one end of fixed sleeve (1) is kept away from to fixed plate (101), riser (103) are vertical upwards to extend, the top of riser (103) is equipped with diaphragm (104), diaphragm (104) extend along the horizontal direction, for with the one end that riser (103) links to each other, the other end of diaphragm (104) is fixed on the outer wall of fixed sleeve (1).

4. The segmented geotome of claim 1, wherein: the bottom of the soil sampling sub-cylinder (201) is provided with a first connecting ring (202), and the outer wall of the first connecting ring (202) is provided with a third thread; the top of a soil taking sub-cylinder (201) is provided with a second connecting ring (203), the inner wall of the second connecting ring (203) is provided with a fourth thread, the outer diameter of the first connecting ring (202) is the same as the inner diameter of the second connecting ring (203), the third thread is matched with the fourth thread, and when two adjacent soil taking sub-cylinders (201) are connected, one of the first connecting rings (202) of the soil taking sub-cylinders (201) is in threaded connection with the other second connecting ring (203) of the soil taking sub-cylinders (201).

5. The segmented geotome of claim 4, wherein: be equipped with first connecting hole (204) on first go-between (202), be equipped with second connecting hole (205) on second go-between (203), first connecting hole (204) with second connecting hole (205) diameter is the same, and two adjacent when the sub-section of thick bamboo (201) of getting earth is connected, second connecting hole (205) of sub-section of thick bamboo (201) of getting earth of below with sub-section of thick bamboo (201) of getting earth of top first connecting hole (204) one-to-one, the bolt passes second connecting hole (205) and spiro union are in first connecting hole (204) that correspond.

6. The segmented geotome of claim 5, wherein: the soil sampling cylinder (2) comprises a left sleeve (206) and a right sleeve (207), a first left connecting ring (208) is arranged at the bottom of the left sleeve (206), and a second left connecting ring (210) is arranged at the top of the left sleeve (206); the bottom of right sleeve (207) is equipped with first right go-between (209), the top of right sleeve (207) is equipped with second right go-between (211), left sleeve (206) with right sleeve (207) are detained into geotome section of thick bamboo (201), first left go-between (208) with first right go-between (209) are detained into first go-between (202), second left go-between (210) with second right go-between (211) are detained into second go-between (203).

7. The segmented geotome of claim 6, wherein: the height of the first left connecting ring (208) is the same as that of the first right connecting ring (209), the height of the second left connecting ring (210) is the same as that of the second right connecting ring (211), the height of the first left connecting ring (208) is larger than that of the second left connecting ring (210), the soil taking sub-cylinder (201) further comprises a mounting ring (212), the mounting ring (212) is in threaded connection with the first connecting ring (202), so that the left sleeve (206) is the same as that of the right sleeve (207), and the height difference between the first left connecting ring (208) and the second left connecting ring (210) is the same as that of the mounting ring (212).

8. The segmented geotome of claim 4, wherein: be equipped with on the soil taking sub-section of thick bamboo (201) and cut off groove (213), cut off groove (213) are located the bottom of second go-between (203), sectional type soil sampler still includes cutting plate (214), the length of cutting off groove (213) with the internal diameter of soil taking sub-section of thick bamboo (201) is the same, the diameter of cutting plate (214) with the internal diameter of soil taking sub-section of thick bamboo (201) is the same, cutting plate (214) can pass through cutting off groove (213) are inserted in soil taking sub-section of thick bamboo (201), cutting plate (214) are circular, one side of cutting plate (214) is equipped with push rod (215).

9. The segmented geotome of claim 5, wherein: the bottom of actuating lever (3) is equipped with connecting plate (302), connecting plate (302) are circular, the diameter of connecting plate (302) with the internal diameter of a soil taking section of thick bamboo (2) is the same, be equipped with third connecting hole (303) on the lateral wall of connecting plate (302), when actuating lever (3) are connected on a soil taking section of thick bamboo (2), connecting plate (302) insert the top in second go-between (203) of a soil taking sub-section of thick bamboo (201), the bolt passes third connecting hole (303) and spiro union are in corresponding in second connecting hole (205).

10. The segmented geotome of claim 9, wherein: the sectional type geotome is characterized by further comprising a geotome (4), the geotome (4) is annular, a fifth thread is arranged on the inner wall of the geotome (4), the fifth thread is matched with the third thread, a cutting edge (402) is arranged at the bottom end of the geotome (4), a fourth connecting hole (401) is formed in the geotome (4), and when the geotome (4) is installed on the geotome cylinder (2), the geotome (4) is in threaded connection with the first connecting ring (202) of the geotome sub-cylinder (201) at the lowest position, and a bolt penetrates through the fourth connecting hole (401) and is in threaded connection with the corresponding first connecting hole (204).