CN111693316A - Cutting ring soil cutting device - Google Patents

Cutting ring soil cutting device Download PDF

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Publication number
CN111693316A
CN111693316A CN202010510511.3A CN202010510511A CN111693316A CN 111693316 A CN111693316 A CN 111693316A CN 202010510511 A CN202010510511 A CN 202010510511A CN 111693316 A CN111693316 A CN 111693316A
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China
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ring
cutting
connecting plate
cutter
cutting ring
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CN202010510511.3A
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CN111693316B (en
Inventor
�谷川�
徐至臻
王军
王鹏
蔡袁强
王林伟
苟兰荣
袁国辉
张婷婷
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Wenzhou University
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Wenzhou University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/02Devices for withdrawing samples
    • G01N1/04Devices for withdrawing samples in the solid state, e.g. by cutting
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/28Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/28Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • G01N2001/2873Cutting or cleaving

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

Abstract

The invention discloses a circular cutter soil cutting device which comprises a support and a circular cutter, wherein the support comprises an upper connecting plate, a lower connecting plate and a plurality of supporting rods, the upper connecting plate and the lower connecting plate are adjustably connected to the supporting rods, through holes matched with the circular cutter are formed in the upper connecting plate and the lower connecting plate, the circular cutter comprises an upper circular cutter and a lower circular cutter, one end of the upper circular cutter is connected into the through hole of the upper connecting plate, the other part of the upper circular cutter extends towards the direction of the lower connecting plate, the inner cavity of the upper circular cutter is communicated with the through hole of the upper connecting plate, one end of the lower circular cutter is connected into the through hole of the lower connecting plate, the other part of the lower circular cutter extends towards the upper connecting plate, the inner cavity of the lower circular cutter is communicated with the through hole of the lower connecting plate, a reset elastic. The device increases the efficiency of cutting the soil sample, reduces the disturbance to the soil sample, guarantees to cut the horizontality and the stability of getting the soil sample.

Description

Cutting ring soil cutting device
Technical Field
The invention relates to a circular cutter soil cutting device.
Background
The traditional cutting ring soil cutting device is an integrated cutting ring, when a soil sample is cut off by the traditional cutting ring, a cutting edge of the cutting ring coated with silicon oil needs to be used for horizontally and slowly cutting the soil sample downwards, and in the process, the soil sample around the cutting ring needs to be cut off by the cutting knife so as to reduce the friction force increased along with the cutting of the cutting ring into the soil sample. In the operation process, the cutting ring is pressed downwards, so that the horizontal state is not easy to keep, and the disturbance of the soil sample is caused; when the soil sample around the annular cutter is cut by the soil cutting cutter, excessive soil is easily cut, and the soil sample which is originally cut into the annular cutter is cut off, so that the sample cutting failure and the waste of the soil sample are caused. The stability of the soil sample is relatively poor, the rejection rate is high and the efficiency is low in the traditional cutting ring.
Disclosure of Invention
In view of the shortcomings of the background art, the technical problem to be solved by the invention is to provide a circular cutter soil cutting device. The device guarantees the horizontality and the stability of surely getting soil sample, reduces the disturbance to soil sample, reduces the disability rate, increases the efficiency of surely getting soil sample.
Therefore, the ring cutter soil cutting device provided by the invention comprises a support and a ring cutter, wherein the support comprises an upper connecting plate, a lower connecting plate and a plurality of supporting rods, the upper connecting plate and the lower connecting plate are adjustably connected to the supporting rods, through holes matched with the ring cutter are formed in the upper connecting plate and the lower connecting plate, the ring cutter comprises an upper ring cutter and a lower ring cutter, one end of the upper ring cutter is connected into the through hole of the upper connecting plate, the other part of the upper ring cutter extends towards the direction of the lower connecting plate, the inner cavity of the upper ring cutter is communicated with the through hole of the upper connecting plate, one end of the lower ring cutter is connected into the through hole of the lower connecting plate, the other part of the lower ring cutter extends towards the direction of the upper connecting plate, the inner cavity of the lower ring cutter is communicated with the through hole of the lower connecting plate.
According to the soil sample cutting device, the upper cutting ring and the lower cutting ring cut into the soil sample vertically and simultaneously to reduce disturbance to the soil sample, the upper cutting ring is connected to the upper connecting plate, the soil cutting knife is not needed to be used for cutting redundant soil samples at the upper end and the lower end of the cutting ring, the upper cutting ring can be driven to press the soil sample horizontally and uniformly only by pressing the connecting plate when the soil sample cutting device is used, the lower cutting ring is subjected to reaction force and acts on the soil sample simultaneously, the path for cutting the soil sample is reduced, the efficiency for cutting the soil sample is increased, disturbance to the soil sample is reduced, and the horizontality and stability of the soil sample are guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a circular cutter soil cutting device according to a first embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the circular-blade soil cutting device shown in FIG. 1;
FIG. 3 is a schematic structural view of an upper cutting ring of the soil cutting device of FIG. 1;
FIG. 4 is a schematic structural view of a lower cutting ring of the soil cutting device of FIG. 1;
FIG. 5 is a schematic structural view of a circular cutting device according to a second embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of the circular-blade soil cutting device shown in FIG. 5;
FIG. 7 is a schematic structural view of an annular cover of the annular cutter soil cutting device in FIG. 5;
FIG. 8 is a schematic structural view of an upper cutting ring of the soil cutting device of FIG. 5;
FIG. 9 is a schematic structural view of a lower cutting ring of the soil cutting device of FIG. 5;
FIG. 10 is a schematic structural view of a circular cutting device according to a third embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view of the circular cutting device of FIG. 10;
FIG. 12 is a schematic structural view illustrating a connection state of an upper inner ring cutter and a lower inner ring cutter of the circular cutter soil cutting device in FIG. 10;
fig. 13 is a schematic structural view of a portion a of the circular cutter earth-cutting device in fig. 12.
Detailed Description
Referring to fig. 1-4, a circular cutter soil cutting device in a first embodiment of the invention comprises a bracket and a circular cutter, wherein the bracket comprises an upper connecting plate 1, a lower connecting plate 2 and a plurality of supporting rods 3, the upper connecting plate 1 and the lower connecting plate 2 are adjustably connected to the supporting rods 3, the supporting rods 3 are sleeved with elastic resetting devices 4, the elastic resetting devices 4 are positioned between the upper connecting plate 1 and the lower connecting plate 2, the elastic resetting devices 4 can be selected from resetting springs, the outer ends of the supporting rods 3 are provided with external threads, the upper ends and the lower ends of the supporting rods 3 are respectively in threaded connection with upper adjusting nuts 5 and lower adjusting nuts 6, the upper adjusting nuts 5 are in threaded connection with the upper end surface of the upper connecting plate 1, the lower adjusting nuts 6 are in threaded connection with the lower end surface of the lower connecting plate 2, and the distance between the upper connecting plate 1 and the lower connecting plate 2 is adjusted by, when the upper connecting plate 1 is in a non-stressed state, the upper connecting plate 1 abuts against the lower end part of the upper adjusting nut 5, and the lower connecting plate 2 abuts against the upper end part of the lower adjusting nut 6.
The upper connecting plate 1 and the lower connecting plate 2 are both provided with through holes matched with the cutting rings, each cutting ring comprises an upper cutting ring 8 and a lower cutting ring 9, the heights of the upper cutting ring 8 and the lower cutting ring 9 are both 1CM, an inner cavity 18 of the upper cutting ring and an inner cavity 19 of the lower cutting ring are cylindrical, one end part of the upper cutting ring is an upper connecting end 20, the upper connecting end 20 of the upper cutting ring is fixedly connected in the through hole 7 of the upper connecting plate, the upper cutting ring extends towards the direction of the lower connecting plate, the inner cavity 18 of the upper cutting ring is communicated with the through hole of the upper connecting plate 1, the other end part of the upper cutting ring 8 is an upper cutting edge end 10, and the outer wall of the upper cutting ring 8 is provided with an arc-shaped surface or an inclined surface; one end part of the lower cutting ring is a lower connecting end 21, the lower connecting end 21 of the lower cutting ring is fixedly connected in a lower connecting plate through hole 22, the lower cutting ring extends towards the upper connecting plate, an inner cavity 19 of the lower cutting ring is communicated with the lower connecting plate 2 through hole, the other end part of the lower cutting ring 9 is a lower cutting edge end 12, the outer wall of the lower cutting ring 9 is provided with an arc-shaped surface or an inclined surface 11 extending from the lower cutting edge end to the lower connecting end 21, and the distance between the upper cutting edge end 10 and the lower cutting edge end 11 is larger than 2 CM.
When a soil sample is cut, the soil sample to be cut is placed between an upper cutting edge end 10 and a lower cutting edge end 12, an upper connecting plate 1 is pressed downwards under stress, the upper cutting edge end 10 abuts against the lower cutting edge end 12, the upper connecting plate 1 can keep horizontal and uniform stress, the soil sample is uniformly cut into inner cavities of an upper ring cutter 8 and a lower ring cutter 9, then the soil cutter is used for cutting redundant soil samples at the upper end and the lower end of the ring cutter, the soil sample around the ring cutter is cut by timely separating the outer wall of an arc surface or an inclined surface 11 during the soil sample cutting process of the upper connecting plate 1 in the pressing process, the soil sample around the ring cutter is not required to be cut by the soil cutter, the disturbance to the soil sample is reduced, the horizontality and the stability of the soil sample are guaranteed, the soil sample cutting efficiency is increased, and after the soil sample cutting is finished, the upper connecting plate is removed under stress, and the soil sample can be taken.
Referring to fig. 5 to 9, a circular cutter earth cutting device according to a second embodiment of the present invention is substantially the same as the first embodiment except that: the upper ring cutter upper connecting end 20 is detachably connected in an upper connecting plate through hole 7, the upper ring cutter extends towards the direction of a lower connecting plate, the lower ring cutter lower connecting end 21 is detachably connected in a lower connecting plate through hole 22, the lower ring cutter extends towards the direction of the upper connecting plate, the upper ring cutter 8 and the lower ring cutter 9 are respectively in threaded connection at the upper connecting plate through hole 7 and the lower connecting plate through hole 22 through a ring cover, the ring cover comprises a ring cover body 13 and a ring connecting part 14 fixed at the lower end of the ring cover body, the outer diameter of the ring cover body 13 is larger than the diameters of the upper connecting plate through hole 7 and the lower connecting plate through hole 22, the inner diameter of the ring cover body 13 is smaller than the diameters of the upper connecting plate through hole 7 and the lower connecting plate through hole 22, the inner wall and the outer wall of the ring connecting part 14 are respectively provided with, the outer end part of the upper connecting end of the upper cutting ring is provided with an internal thread 23 matched with the external thread, and the outer end part of the lower connecting end of the lower cutting ring is provided with an internal thread 23 matched with the external thread. When the annular cutter is assembled, the annular cover is respectively in threaded connection with the upper connecting plate 1 and the lower connecting plate 2, the external threads 15 of the outer wall of the annular connecting portion are in threaded connection with the internal threads in the through hole 7 in a matched mode, the upper connecting end 20 of the upper annular cutter and the lower connecting end 21 of the lower annular cutter are respectively in threaded connection with the inner cavity of the corresponding annular connecting portion 14 in a matched mode, the internal threads of the upper connecting end 20 of the upper annular cutter are in matched connection with the external threads of the inner wall of the corresponding annular connecting portion in a matched mode, the internal threads of the lower connecting end 21 of the lower annular cutter are in matched connection with the external threads of the inner wall of the corresponding annular connecting portion in a matched mode, and the upper connecting end. During the use, place the soil sample in between cutting ring 8 and the lower cutting ring 9, the soil sample surely gets the back, the annular lid of connecting cutting ring 8 and lower cutting ring 9 is rotatory withdrawed from earlier, break away from cutting ring 8 and upper junction plate 1, lower cutting ring 9 breaks away from with lower connecting plate 2, the soil sample after surely getting is placed in cutting ring 8 and the inner chamber of lower cutting ring 9 all the time, need not to say that the soil sample takes out from cutting ring and the lower cutting ring, reduces the disturbance to the soil sample, prevents that the soil sample from taking out the disturbance that causes from the cutting ring in-process.
Referring to fig. 7, 10, 11, 12 and 13, a circular cutter earth-cutting device according to a third embodiment of the present invention is substantially the same as the second embodiment except that: the upper cutting ring comprises an upper outer cutting ring 24 and an upper inner cutting ring 25, the lower cutting ring comprises a lower outer cutting ring 26 and a lower inner cutting ring 27, the upper inner cutting ring 25 and the lower inner cutting ring 27 are respectively detachably connected to the upper outer cutting ring 24 and the lower outer cutting ring 26 through annular covers, one end of the upper outer cutting ring 24 is fixed in the upper connecting plate through hole 7, the other parts of the upper outer cutting ring 24 extend towards the lower connecting plate direction, the upper inner cutting ring 25 is connected to the inner cavity of the upper outer cutting ring 24 through annular covers in a threaded mode, one end of the lower outer cutting ring 26 is fixed in the lower connecting plate through hole 22, the other parts of the lower outer cutting ring 26 extend towards the upper connecting plate direction, and the lower inner cutting ring 27 is connected to the inner cavity of the lower outer cutting ring 26 through annular. The annular cover comprises an annular cover body 13 and an annular connecting portion 14 fixed at the lower end of the annular cover body, external threads 15 are arranged on the inner wall and the outer wall of the annular connecting portion 14, internal threads matched with the external threads 15 are arranged on the inner walls of the connecting ends of the upper outer annular cutter and the lower outer annular cutter and the connecting plate, and internal threads matched with the external threads 15 are arranged on the outer walls of the outer end portions of the upper inner annular cutter 25 and the lower inner annular cutter 27. When the annular cutter is assembled, the annular cover is in threaded connection with the upper outer annular cutter 24 and the lower outer annular cutter 26 respectively, the external threads of the outer wall of the annular connecting portion are in fit connection with the internal threads of the inner walls of the upper outer annular cutter 24 and the lower outer annular cutter 26, the upper inner annular cutter 25 and the lower inner annular cutter 27 are in threaded connection in the annular cover respectively, the external threads of the inner wall of the annular connecting portion are in fit connection with the internal threads of the outer walls of the upper inner annular cutter 25 and the lower inner annular cutter 27, and the outer walls of the upper outer annular cutter 24 and the lower outer annular cutter 26 are provided with arc surfaces or inclined surfaces 11 extending from the bottom to the corresponding connecting.
The end part of the upper inner ring cutter 25 facing the lower inner ring cutter is an upper inner cutter edge end 28, the cutter edge end of the upper inner ring cutter extends out of the upper outer ring cutter 24, the outer side wall of the upper inner ring cutter 25 is uniformly provided with a plurality of hooks, the end part of the lower inner ring cutter 27 facing the upper inner ring cutter 25 is a lower inner cutter edge end 29, the lower inner cutter edge end 29 extends out of the lower outer ring cutter, each hook comprises a fixing block 30 and an upper hook part 31, and the end part of the upper hook part 31 facing the lower inner ring cutter direction is provided with a cutter edge. The outer side wall of the lower inner annular knife 25 is provided with a buckling hole matched with the clasp, the buckling hole comprises a shell 32, the shell 32 is fixed on the outer side wall of the lower inner annular knife 27 and corresponds to the clasp, a through hole 33 for conducting the shell is arranged at the position of the shell 32 corresponding to the upper hook portion 31, and the inner wall of the shell is provided with a lower hook portion 34 matched with the upper hook portion 31.
When the soil sample clamping device is used, a soil sample is placed between the upper annular cutter and the lower annular cutter, the upper connecting plate 1 is pressed downwards under stress to drive the upper outer annular cutter 24 and the upper inner annular cutter 25 to be pressed downwards, the upper inner cutter edge end 28 is pressed downwards to abut against the lower inner cutter edge end 29, the upper connecting plate 1 can keep horizontal and uniform stress, the soil sample is uniformly cut into inner cavities of the upper annular cutter and the lower annular cutter, the upper inner annular cutter abuts against the cutter edge end of the lower inner annular cutter, meanwhile, the hook is buckled into the buckle hole, and the upper hook portion 31 penetrates through the through hole 33 to be clamped into the hook groove 35 of the lower hook portion 34. Go up inner ring sword 25 and lower inner ring sword 27 interconnect, soil sample surely gets the back, will go up the annular lid rotation and withdraw from, go up inner ring sword 25 and go up outer ring sword 24 and break away from, lower inner ring sword 27 breaks away from with lower outer ring sword 26, through cut the surplus soil sample of lower extreme on will going up inner ring sword 25 and lower inner ring sword 27 through cutting the soil sword, it is in connected state all the time to go up inner ring sword 25 and lower inner ring sword 27, last inner ring sword 25 and lower inner ring sword 27 after the connection become one whole, can prevent to go up inner ring sword 25 and lower inner ring sword 27 kneck removal, the disturbance to the soil sample that significantly reduces increases simultaneously and cuts the efficiency of soil sample.

Claims (10)

1. The utility model provides a native device is cut to cutting ring, characterized by: including support and cutting ring, the support includes upper junction plate, lower connecting plate and a plurality of bracing piece, upper junction plate and lower connecting plate adjustable connection are on the bracing piece, all have on upper junction plate and the lower connecting plate with the through-hole of cutting ring adaptation, the cutting ring includes cutting ring and lower cutting ring, in upper junction plate through-hole was connected to upper cutting ring one end, other parts of cutting ring extend to the lower connecting plate direction, and the inner chamber of cutting ring switches on with the upper junction plate through-hole, cutting ring one end is connected in the lower connecting plate through-hole, and other parts of lower cutting ring extend to the upper junction plate direction, and the inner chamber of cutting ring switches on with the lower connecting plate through-hole down, the resilient means that resets has cup jointed on the bracing piece, the resilient means that resets is located between upper junction plate and the.
2. The circular cutter soil cutting device of claim 1, wherein: one end of the upper cutting ring is an upper connecting end, the upper connecting end of the upper cutting ring is connected in the through hole of the upper connecting plate, the other end of the upper cutting ring is an upper cutting edge end, and the outer wall of the upper cutting ring is provided with an arc-shaped surface or an inclined surface extending from the upper cutting edge end to the upper connecting end; one end part of the lower cutting ring is a lower connecting end, the lower connecting end of the lower cutting ring is connected in the through hole of the lower connecting plate, the other end part of the lower cutting ring is a lower cutting edge end, and the outer wall of the lower cutting ring is provided with an arc-shaped surface or an inclined surface extending from the lower cutting edge end to the lower connecting end.
3. A circular cutter soil cutting device according to claim 1 or 2, wherein: the outer end of the supporting rod is provided with external threads, the upper end and the lower end of the supporting rod are respectively in threaded connection with an upper adjusting nut and a lower adjusting nut, the distance between the upper connecting plate and the lower connecting plate is adjusted by adjusting the upper adjusting nut and the lower adjusting nut, the upper connecting plate is abutted against the lower end part of the upper adjusting nut when the upper connecting plate is in a non-stressed state, and the lower connecting plate is abutted against the upper end part of the lower adjusting nut.
4. The circular cutter soil cutting device as claimed in claim 3, wherein the height of the upper circular cutter and the height of the lower circular cutter are both 1CM, and inner cavities of the upper circular cutter and the lower circular cutter are cylindrical.
5. The circular cutter soil cutting device as claimed in claim 4, wherein one end of the upper circular cutter is fixedly connected in the through hole of the upper connecting plate, and one end of the lower circular cutter is fixedly connected in the through hole of the lower connecting plate.
6. The circular cutter soil cutting device of claim 4, wherein: the upper cutting ring and the lower cutting ring are detachably connected with the through hole of the upper connecting plate and the through hole of the lower connecting plate respectively through annular covers, each annular cover comprises an annular cover body and an annular connecting portion fixed to the lower end of the annular cover body, the inner wall and the outer wall of each annular connecting portion are provided with external threads, the inner walls of the through holes of the upper connecting plate and the through holes of the lower connecting plate are provided with internal threads matched with the external threads, the outer end portion of the upper connecting end of the upper cutting ring is provided with internal threads matched with the external threads, and the outer end portion of the lower connecting end of the lower.
7. The circular cutter soil cutting device of claim 1, wherein: the upper cutting ring comprises an upper outer cutting ring and an upper inner cutting ring, the lower cutting ring comprises a lower outer cutting ring and a lower inner cutting ring, the upper outer cutting ring is fixed at the through hole of the upper connecting plate, the upper inner cutting ring is detachably connected with the inner cavity of the upper outer cutting ring, the end part of the upper inner cutting ring facing the direction of the lower inner cutting ring is an upper cutting edge end, and the cutting edge end of the upper inner cutting ring extends out of the inner cavity of the upper outer cutting ring; the lower outer ring cutter is fixed at the through hole of the lower connecting plate, the lower inner ring cutter is detachably connected with the inner cavity of the lower outer ring cutter, the end part of the lower inner ring cutter facing the direction of the upper inner ring cutter is a lower cutter edge end, and the cutter edge end of the lower inner ring cutter extends out of the inner cavity of the lower outer ring cutter.
8. The circular cutter soil cutting device of claim 7, wherein: go up and be provided with a plurality of clips on the inner ring sword lateral wall, the inner ring sword lateral wall has the knot hole with clip looks adaptation down, during the use, pushes down the upper junction plate, goes up the cutting edge end looks butt of inner ring sword and lower inner ring sword, the clip is detained in the knot hole.
9. The circular cutter soil cutting device of claim 8, wherein: the clasp includes fixed block and upper hook portion, the tip of upper hook portion orientation inner ring sword direction down has the cutting edge, detain the hole and include the casing, the casing is fixed on the inner ring sword lateral wall down and corresponding with the clasp, the casing corresponds the position of hook portion and is equipped with the through-hole that switches on the casing, shells inner wall has the lower hook portion with upper hook looks adaptation, and during the use, the upper junction plate atress drives outer cutting ring and last inner ring sword and pushes down, and upper knife sword end and lower knife sword end offset, and upper hook portion passes the hook inslot that hook portion under the through-hole card goes into.
10. A circular cutting apparatus according to claim 7, 8 or 9, wherein: the upper inner ring cutter and the lower inner ring cutter are respectively detachably connected to the upper outer ring cutter and the lower outer ring cutter through annular covers, each annular cover comprises an annular cover body and an annular connecting portion fixed to the lower end of the annular cover body, the inner wall and the outer wall of each annular connecting portion are provided with external threads, the inner walls of the end portions, connected with the connecting plates, of the upper outer ring cutter and the lower outer ring cutter are provided with internal threads matched with the external threads, and the outer walls of the outer end portions of the upper inner ring cutter and the lower inner ring cutter are provided with internal threads matched with the external threads.
CN202010510511.3A 2020-06-08 2020-06-08 Ring knife soil cutting device Active CN111693316B (en)

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CN111693316B CN111693316B (en) 2024-03-22

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