CN117883126B

CN117883126B - Puncture sampling device

Info

Publication number: CN117883126B
Application number: CN202410281737.9A
Authority: CN
Inventors: 申明艳; 李立朋; 何伟
Original assignee: Dezhou Hongquan Medical Equipment Co ltd
Current assignee: Dezhou Hongquan Medical Equipment Co ltd
Priority date: 2024-03-13
Filing date: 2024-03-13
Publication date: 2024-05-10
Anticipated expiration: 2044-03-13
Also published as: CN117883126A

Abstract

The invention relates to the field of biopsy sampling, in particular to a puncture sampling device. Two shaft shoulders arranged at intervals are arranged on the side walls of the left side and the right side of the sampling tube, and the front side wall and the rear side wall are in sealing contact with the inner wall of the hydraulic cylinder. The sampling needle is vertically fixed at the lower end of the sampling tube and extends out of the hydraulic cylinder. Two outer piston cylinders are each mounted slidably up and down between two shoulders located on one side. The cavity between boss, pneumatic cylinder, shaft shoulder and sampling tube constitutes sealed stopping chamber, and the stopping subassembly includes stopping slider and spacing slider. The check slide block is provided with a check valve which allows the check valve to pass through from bottom to top so as to ensure that the check slide block slides into the boss. The limiting slide block is slidably arranged on the upper surface of the boss, and when the one-way valve is communicated with the corresponding damping hole, the limiting slide block is popped inwards, the sampling tube is not extruded by pressure to be pushed out upwards, and therefore stability of the device is enhanced during sampling.

Description

Puncture sampling device

Technical Field

The invention relates to the field of biopsy sampling, in particular to a puncture sampling device.

Background

"Biopsy" refers to a technique of taking out a lesion tissue from a patient by incision, forceps, puncture, or the like, and performing pathological examination, in response to diagnosis and treatment. It is the most important part of the diagnosis pathology, and makes clear histopathological diagnosis for most of the inspection cases, and is used as the final diagnosis in clinic. The prior biopsy sampling technique mostly adopts a full-automatic biopsy gun to sample, and patent CN112107335A provides a kidney puncture sampling device, which is used for puncture sampling, wherein the stability of the device is poor when the puncture needle is upwards extracted, and secondary injury can be caused to a patient.

Disclosure of Invention

The invention provides a puncture sampling device, which aims to solve the problem of poor stability of the existing puncture device.

The invention relates to a puncture sampling device, which adopts the following technical scheme:

The puncture sampling device comprises a mounting seat, a hydraulic cylinder, a sampling device, two outer piston cylinders and two outer retaining components; the hydraulic cylinder is fixedly arranged on the mounting seat, and a sealing cavity is defined in the hydraulic cylinder; the sampling device comprises a sampling tube and a sampling needle; the sampling tube is vertically and vertically slidably arranged on the hydraulic cylinder; two shaft shoulders arranged at intervals are arranged on the side walls of the left side and the right side of the sampling tube, and the front side wall and the rear side wall are in sealing contact with the inner wall of the hydraulic cylinder; the upper end of the sampling tube is provided with a first push rod which extends upwards to form a hydraulic cylinder; the sampling needle is vertically fixed at the lower end of the sampling tube and extends out of the hydraulic cylinder; each outer piston cylinder is arranged between two shaft shoulders on one side in an up-down sliding manner, and the peripheral wall of the outer piston cylinder is respectively in sealing contact with the inner wall of the hydraulic cylinder and the outer wall of the sampling tube; the upper end of the outer piston cylinder comprises a boss protruding outwards; the inner surface of the boss is in sealing contact with the outer surface of the shaft shoulder, and a sealed backstop cavity is formed by the boss, the hydraulic cylinder, the shaft shoulder and the cavity between the sampling pipes; damping holes are formed in the upper end face and the lower end face of the outer piston cylinder; the outer retaining component comprises a retaining slide block and a limiting slide block; the retaining slide block is arranged in the retaining cavity and can be inserted into the boss in a sliding manner along the horizontal direction; the check slide block is provided with a check valve which is allowed to pass through from bottom to top, so that when the check slide block slides into the boss, the check valve is communicated with a damping hole at the upper end of the outer piston cylinder; the limit sliding block is slidably arranged on the upper surface of the boss, and the upper surface is in an inclined plane shape with the height of the inner bottom outside; the inclined surface of the limit sliding block is contacted with the lower surface of the shaft shoulder and is connected with the boss through an elastic mechanism, so that the limit sliding block can spring inwards when the one-way valve is communicated with the corresponding damping hole.

Further, the puncture sampling device further comprises two first reset components; the first reset assembly comprises a first reset spring, a reset connecting rod and a reset gear; the first push rod is rotatably arranged on the sampling tube; the side wall of the limit sliding block is of a rack structure; the reset gear is rotatably arranged on the boss and meshed with the rack on the limit sliding block so as to drive the limit sliding block to slide outwards when the reset gear rotates; the reset connecting rod is vertically arranged, the upper end of the reset connecting rod is fixedly connected with the first push rod, and the lower end of the reset connecting rod is of a tooth-shaped structure, so that the reset connecting rod is meshed with the reset gear when the limit sliding block pops inwards; the first reset spring is vertically arranged, the lower end of the first reset spring is fixed at the bottom of the hydraulic cylinder, and the upper end of the first reset spring is connected with the sampling tube so that the first reset spring compresses and holds the force when the sampling tube slides downwards.

Further, a sampling inner tube and a solid tube are arranged in the sampling tube; the sampling inner tube is vertically arranged, and the upper end of the sampling inner tube upwards extends to form a second push rod coaxial with the first push rod; the second push rod is rotatably arranged on the sampling inner tube and extends upwards to the outer side of the first push rod; the front side wall and the rear side wall of the sampling inner tube are in sealing contact with the sampling tube; a first linkage assembly is arranged between the first push rod and the second push rod so as to drive the first push rod to synchronously downwards when the second push rod downwards pushes; the solid tube can rotate and can be inserted in the sampling inner tube in an up-down sliding way, is coaxial with the second push rod, and the upper end of the solid tube extends upwards out of the outer side of the second push rod; a second linkage assembly is arranged between the solid pipe and the second push rod so as to drive the second push rod to synchronously downwards when the solid rod downwards pushes; the sampling needle is divided into three layers, wherein the internal sampling needle is a solid sampling needle, the solid sampling needle is fixedly connected with a solid tube, the upper end of the internal sampling needle positioned in the middle is fixedly connected with a sampling inner tube, and the external sampling needle positioned at the outermost side is fixedly connected with the sampling tube.

Further, two inner piston cylinders, two inner stop assemblies and two second reset assemblies are arranged between the sampling tube and the sampling inner tube; two inner shaft shoulders which are arranged at intervals are arranged on the left side wall and the right side wall of the sampling inner tube; the inner piston cylinder and the outer piston cylinder have the same structure and are slidably arranged between two inner shafts positioned on the same side; each inner piston cylinder is provided with an inner backing component, and the inner backing component and the outer backing component have the same structure; the second reset component and the first reset component have the same structure and are used for connecting the second push rod and the limiting slide block of the inner stop component.

Further, the first linkage assembly comprises a first linkage chute and a first linkage strut; the first linkage chute extends along the axial direction of the sampling tube, is arranged on a first push rod at the outer side of the hydraulic cylinder, and the upper end side wall of the first linkage chute extends out of the limit plate towards the other side; the first linkage slide column is fixedly arranged on the second push rod and can be inserted into the first linkage slide groove in a sliding manner; the first linkage slide column initial state is contacted with the upper surface of the blocking block.

Further, the second linkage assembly includes a second linkage chute and a second linkage strut; the second linkage chute comprises a main chute body and an auxiliary chute body; the main groove body extends along the axial direction of the sampling inner tube and is arranged on the second push rod outside the first push rod; the auxiliary tank body and the main tank body are parallel to each other and are arranged on one side of the upper end of the main tank body, and the upper end of the main tank body is communicated with the auxiliary tank body; the second linkage slide column is fixedly arranged on the solid tube and can be inserted into the second linkage slide groove in a sliding manner, and the initial state of the second linkage slide column is positioned in the auxiliary groove body.

Further, a lancing sampling device further includes a rack plate; the rack plate is provided with racks, is mutually parallel to the axis of the sampling tube, is fixedly connected with the upper end of the hydraulic cylinder and is positioned at the rear side of the sampling tube; the first push rod is provided with a first clamping block which can be clamped with a rack on the rack plate; the second push rod is provided with a second clamping block which can be clamped with the rack on the rack plate.

Further, an inner spring is arranged between the solid tube and the sampling inner tube; the upper end of the inner spring is fixedly connected with the bottom of the solid tube, and the lower end of the inner spring is fixedly connected with the sampling inner tube.

The beneficial effects of the invention are as follows: the puncture sampling device is provided with a sampling device, two outer piston cylinders and two outer retaining assemblies, and a retaining slide block is provided with a one-way valve which allows the passage from bottom to top. The volume of the check cavity becomes smaller when the sampling tube slides downwards, and then the check slide block is pushed out outwards, so that after the check valve on the check slide block is communicated with the corresponding damping hole, the check slide block is ejected inwards, and the shaft shoulder is clamped.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a puncture sampling device according to the present invention;

FIG. 2 is an initial sectional view of an embodiment of a lancing sampling device according to the present invention;

FIG. 3 is a partial enlarged view at B in FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 2 at F;

FIG. 5 is a cross-sectional view of a sampling state of an embodiment of a lancing sampling device according to the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 5 at C;

FIG. 7 is a schematic view of a sampling tube according to an embodiment of the present invention;

in the figure: 1. a hydraulic cylinder; 101. a mounting base; 102. rack plate; 2. a first push rod; 21. resetting the connecting rod; 22. the first linkage chute; 23. a first clamping block; 3. a second push rod; 31. a second reset assembly; 32. a second linkage chute; 33. a first linkage strut; 34. a second clamping block; 4. a solid tube; 41. a solid sampling needle; 42. a second linkage spool; 5. a sampling tube; 51. an external sampling needle; 52. a shaft shoulder; 53. an outer cylinder; 6. an outer piston cylinder; 61. a boss; 62. a stop cavity; 63. an upper chamber; 64. a lower chamber; 7. an inner piston cylinder; 71. an inner backstop assembly; 8. sampling an inner tube; 81. an inner shoulder; 82. an internal sampling needle; 83. stabilizing the inner cylinder; 9. a first return spring; 11. an inner spring; 12. a limit sliding block; 13. a limit spring; 14. a stop slide block; 15. and a reset gear.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

An embodiment of a puncture sampling device according to the present invention, as shown in fig. 1 to 7, includes a mounting base 101, and further includes a hydraulic cylinder 1, a sampling device, two outer piston cylinders 6, and two outer stop assemblies. The hydraulic cylinder 1 is fixedly arranged on the mounting seat 101, the hydraulic cylinder 1 is rectangular and cylindrical, a sealing cavity is defined in the hydraulic cylinder 1, and hydraulic oil is arranged in the sealing cavity of the hydraulic cylinder 1. The sampling device comprises a sampling tube 5 and a sampling needle. The sampling tube 5 is installed in the hydraulic cylinder 1 to vertically slide up and down. The sampling tube 5 is in a cuboid shape, two shaft shoulders 52 which are arranged at intervals are arranged on the side walls of the left side and the right side of the sampling tube 5, and the front side wall and the rear side wall are in sealing contact with the inner wall of the hydraulic cylinder 1. The upper end of the sampling tube 5 is provided with a first push rod 2, the first push rod 2 is vertically arranged, the lower end of the first push rod is connected with the upper end of the sampling tube 5, and the first push rod 2 extends upwards to form a hydraulic cylinder 1 so as to drive the sampling tube 5 to move downwards when the first push rod 2 pushes downwards. The sampling needle is vertically fixed at the lower end of the sampling tube 5 and extends out of the hydraulic cylinder 1, and the sampling needle is used for being inserted into a sampling position to collect samples. Each outer piston cylinder 6 is arranged between two shaft shoulders 52 on one side in a vertically sliding manner, the outer piston cylinders 6 are in a cuboid shape, a sealing cavity is formed in each outer piston cylinder 6, and the peripheral walls of the outer piston cylinders 6 are respectively in sealing contact with the inner wall of the hydraulic cylinder 1 and the outer wall of the sampling tube 5. The upper end of the outer cylinder 6 comprises an outwardly projecting boss 61, the inner surface of the boss 61 being in sealing contact with the outer surface of the shoulder 52, the boss 61 dividing the chamber between the outer cylinder 6 and the cylinder 1 into an upper chamber 63 and a lower chamber 64. The cavity between the boss 61, the hydraulic cylinder 1, the shaft shoulder 52 and the sampling tube 5 forms a sealed retaining cavity 62, so that when the sampling tube 5 is inserted downwards, the shaft shoulder 52 slides downwards relative to the inner surface of the boss 61, and the pressure in the retaining cavity 62 is increased. Damping holes are formed in the upper end face and the lower end face of the outer piston cylinder 6, the upper end damping holes penetrate through the boss 61, and when the sampling tube 5 is pressed downwards by the first push rod 2, the sampling tube 5 can move downwards relative to the piston cylinder.

The outer stop assembly includes a stop slide 14 and a limit slide 12. The retaining slider 14 is disposed in the retaining chamber 62 and is slidably inserted into the boss 61 in the horizontal direction, specifically, a portion where the bottom surface of the retaining slider 14 meets the bottom surface of the retaining chamber 62. The check slider 14 is provided with a check valve which allows the check valve to pass through from bottom to top, so that when the check slider 14 slides into the boss 61, the check valve is communicated with a damping hole at the upper end of the outer piston cylinder 6, hydraulic oil flows from the lower chamber 64 to the upper chamber 63 through the damping hole, and when the check valve is communicated with the damping hole at the upper end, the outer piston cylinder 6 cannot move upwards, specifically, when the shaft shoulder 52 slides downwards relative to the boss 61, the volume of the check cavity 62 is reduced, and the check slider 14 is pushed outwards by pressure. The limit slider 12 is slidably mounted on the upper surface of the boss 61, and the upper surface is an inclined plane with the height of the inner bottom. The inclined surface of the limit slider 12 contacts with the lower surface of the shaft shoulder 52 and is connected with the boss 61 by an elastic mechanism, so that the limit slider 12 pops inwards when the check valve is communicated with the corresponding damping hole. Specifically, the upper surface of the boss 61 is provided with a mounting groove extending in the radial direction of the hydraulic cylinder 1, and the limit slider 12 is slidably mounted in the mounting groove. The elastic mechanism is a limiting spring 13, and the limiting spring 13 is fixedly arranged between the limiting slide block 12 and the boss 61 and is in a compressed state. The limit slider 12 is released and ejected by the limit spring 13, so that the lower surface of the limit slider 12 is contacted with the upper surface of the shaft shoulder 52, and the lower surface of the limit slider 12 and the bottom of the retaining cavity 62 lock the shaft shoulder 52, so that the sampling tube 5 cannot retract.

In this embodiment, as shown in fig. 2 to 7, a puncture sampling device further includes two first reset components. The first return assembly comprises a first return spring 9, a return link 21 and a return gear 15. The first push rod 2 is rotatably arranged on the sampling tube 5, and the side wall of the limit sliding block 12 is of a rack structure. The reset gear 15 is rotatably mounted on the boss 61 and located at one side of the limit slider 12, and is meshed with a rack on the limit slider 12, so as to drive the limit slider 12 to slide outwards when the reset gear 15 rotates. The reset connecting rod 21 is vertically arranged, the upper end of the reset connecting rod 21 is fixedly connected with the first push rod 2, the reset connecting rod 21 is vertically arranged, the upper end of the reset connecting rod horizontally extends inwards and is fixedly connected with the first push rod 2, the lower end of the reset connecting rod is of a tooth-shaped structure, when the limit sliding block 12 is ejected, the reset connecting rod 21 is meshed with the reset gear 15, the reset gear 15 is driven to rotate when the first push rod 2 rotates, and then the reset gear 15 drives the limit sliding block 12 to reset. The first reset spring 9 is vertically arranged, the lower end of the first reset spring is fixed at the bottom of the hydraulic cylinder 1, the upper end of the first reset spring is connected with the sampling tube 5, the two sides of the peripheral wall of the lower end of the sampling tube 5 are horizontally extended outwards to form a fixed plate, the upper end of the first reset spring 9 is fixedly connected with the fixed plate, so that when the sampling tube 5 slides downwards, the first reset spring 9 compresses and holds the force, and when the limit sliding block 12 slides outwards to the mounting groove completely, the first reset spring 9 is released to reset the sampling tube 5.

In this embodiment, as shown in fig. 2 to 7, a sampling inner tube 8 and a solid tube 4 are provided in the sampling tube 5. The sampling inner tube 8 is vertically arranged, the upper end of the sampling inner tube upwards extends out to form a second push rod 3 coaxial with the first push rod 2, and the second push rod 3 is rotatably and movably arranged on the sampling inner tube 8 and upwards extends out of the first push rod 2. The sampling inner tube 8 is cuboid, and the front side wall and the rear side wall are in sealing contact with the sampling tube 5. A first linkage assembly is arranged between the first push rod 2 and the second push rod 3 so as to drive the first push rod 2 to synchronously downwards when the second push rod 3 downwards pushes, and when the second push rod 3 rotates anticlockwise relative to the first push rod 2, the first linkage mechanism releases the association between the first push rod 2 and the second push rod 3 so that the second push rod 3 can continuously downwards push relative to the first push rod 2; the solid tube 4 is rotatably and vertically slidably inserted in the sampling inner tube 8 and is coaxial with the second push rod 3, the solid tube 4 is cylindrical, the solid tube 4 is inserted in the sampling inner tube 8 in a sealing manner, the upper end of the solid tube extends upwards out of the outer side of the second push rod 3, in particular, the lower end of the solid tube 4 is provided with the stabilizing inner tube 83, the bottom of the sampling inner tube 8 is fixedly provided with the stabilizing outer tube 53 which can be sealed on the stabilizing inner tube 83 in a sealing manner, and then the stability of the solid tube 4 in the downward insertion process is improved, as shown in fig. 4. A second linkage assembly is arranged between the solid tube 4 and the second push rod 3 so as to drive the second push rod 3 to synchronously downwards when the solid rod is pushed downwards, and when the solid rod rotates anticlockwise relative to the second push rod 3, the second linkage assembly releases the association between the second push rod 3 and the solid tube 4 so that the solid tube 4 can be pushed downwards relative to the second push rod 3, and an inner spring 11 is arranged between the solid tube 4 and the sampling inner tube 8. The upper end of the inner spring 11 is fixedly connected with the bottom of the solid tube 4, and the lower end is fixedly connected with the sampling inner tube 8. The sampling needle is divided into three layers, wherein the inside sampling needle is solid sampling needle 41, is equipped with the extraction groove on the solid sampling needle 41 perisporium to draw the groove and take the sample upwards when solid sampling needle 41 upwards draws, solid sampling needle 41 upper end and solid pipe 4 rigid coupling, the upper end and the inside of sampling inner tube 8 rigid coupling that are located the centre of inside sampling needle 82 are linked together with the inside of sampling inner tube 8, carry out the circular cutting to the sample position when inside sampling needle 82 inserts downwards, in order to make things convenient for better extraction sample. The outer sampling needle 51 located at the outermost side is fixedly connected with the sampling tube 5 and communicated with the inside of the sampling tube 5, and the outer sampling needle 51 prevents the lesion position from being spread in the sampling process.

In this embodiment, as shown in fig. 2 to 7, two inner piston cylinders 7, two inner stopper assemblies 71 and two second reset assemblies 31 are provided between the sampling tube 5 and the sampling inner tube 8. The left and right side walls of the sampling inner tube 8 are respectively provided with two inner shaft shoulders 81 arranged at intervals, the inner piston cylinder 7 and the outer piston cylinder 6 are identical in structure and slidably mounted between two inner shafts positioned on the same side, each inner piston cylinder 7 is provided with an inner retreating component, the inner retreating components 71 and the outer retreating components are identical in structure, so that the sampling inner tube 8 is prevented from retreating, the second reset component 31 is identical in structure with the first reset component, and the second reset component is used for connecting the second push rod 3 and the limit slide block 12 of the inner retreating components 71.

In this embodiment, as shown in fig. 7, the first linkage assembly includes a first linkage chute 22 and a first linkage strut 33, the first linkage chute 22 extends along the axial direction of the sampling tube 5, and is disposed on the first push rod 2 outside the hydraulic cylinder 1, and the upper end sidewall of the first linkage chute 22 extends to the other side to form a limiting plate, and a certain gap exists between the limiting plate and the other side sidewall of the first linkage chute 22. The first link slide 33 is fixedly mounted on the second push rod 3 and slidably inserted into the first link slide 22. The first linkage slide column 33 is in contact with the upper surface of the blocking block in an initial state, so that the first push rod 2 is driven to synchronously rotate when the second push rod 3 rotates clockwise, and when the second push rod 3 rotates anticlockwise by a certain angle, the first linkage slide column 33 is disengaged from the limiting plate and slides downwards from a gap between the limiting plate and the first linkage slide groove 22, so that the second push rod 3 can be pushed downwards relative to the first push rod 2.

In this embodiment, the second linkage assembly includes a second linkage chute 32 and a second linkage strut 42. The second linkage chute 32 includes a main chute body and a sub chute body. The main groove body extends along the axial direction of the sampling inner tube 8 and is arranged on the second push rod 3 outside the first push rod 2. The auxiliary groove body and the main groove body are mutually parallel, the length of the auxiliary groove body is smaller than that of the main groove body, the auxiliary groove body is arranged on one side of the upper end of the main groove body, and the upper end of the main groove body is communicated with the auxiliary groove body. The second linkage slide column 42 is fixedly installed on the solid tube 4 and slidably inserted into the second linkage slide groove 32, the initial state of the second linkage slide column 42 is located in the auxiliary groove body so as to drive the second push rod 3 to synchronously rotate when the solid tube 4 rotates in the initial state, and when the solid tube 4 is lifted upwards and rotated anticlockwise by a certain angle, the second linkage slide column 42 is separated from the auxiliary groove body, so that the solid tube 4 can slide downwards relative to the second push rod 3.

In this embodiment, as shown in fig. 1, 5 and 7, a puncture sampling device further includes a rack plate 102. The rack plate 102 is provided with racks, the rack plate 102 is parallel to the axis of the sampling tube 5, is fixedly connected with the upper end of the hydraulic cylinder 1 and is positioned at the rear side of the sampling tube 5; the first push rod 2 is provided with a first clamping block 23 which can be clamped with a rack on the rack plate 102, so that the first clamping block 23 is clamped with the rack plate 102 when the second push rod 3 rotates clockwise, and the sampling inner tube 8 is provided with a second clamping block 34 which can be clamped with the rack on the rack plate 102, so that the second clamping block 34 is clamped with the rack plate 102 when the solid tube 4 rotates clockwise.

In operation, as shown in fig. 2, the solid tube 4 is pushed downward in the initial state, because the first linkage slide column 33 is located on the limiting plate of the first linkage slide groove 22, the second linkage slide column 42 is located in the auxiliary groove body of the second linkage slide groove 32, and then the solid tube 4 pushes the second push rod 3 to push the first push rod 2 to move downward, and the first push rod 2 pushes the sampling tube 5 to slide downward in the hydraulic cylinder 1. Due to the arrangement of the damping hole on the outer piston cylinder 6, in the process of downward sliding of the sampling tube 5, the shaft shoulder 52 moves downward relative to the outer piston cylinder 6, the volume in the check cavity 62 is reduced, the pressure in the check cavity 62 is increased, the check slider 14 is pushed out by the check cavity 62 until the check slider 14 slides into the boss 61, the check valve and the corresponding damping hole are communicated, then hydraulic oil in the hydraulic cylinder 1 can only flow upward from the lower end of the check valve on the check slider 14, and meanwhile the limit slider 12 is ejected by the limit spring 13, and the bottoms of the limit slider 12 and the check cavity 62 clamp the corresponding shaft shoulder 52, so that the pressure of the sampling tube 5 when being pressed down by the sampling needle is prevented from being pushed out upward as shown in fig. 5 and 6. The sampling needle is aimed at the outside position of the part to be sampled, and penetrates downwards under the drive of the sampling tube 5, when the external sampling needle 51 is close to the part to be sampled, the solid tube 4 is rotated clockwise, the first push rod 2 is driven by the second push rod 3 to rotate clockwise synchronously, so that the first clamping block 23 is clamped with the rack on the rack plate 102, then the solid tube 4 is rotated anticlockwise to drive the second push rod 3 to rotate, the first linkage slide column 33 is disengaged from the limiting plate on the first linkage slide groove 22, so that the solid tube 4 is continuously pushed downwards, the second push rod 3 is driven to slide downwards relative to the first push rod 2, and the sampling inner tube 8 is further driven to slide downwards.

The inner piston cylinder 7 and the inner retaining component 71 which are arranged between the sampling inner tube 8 and the sampling tube 5 have the same structure as the outer piston cylinder 6 and the outer retaining component, so that when the sampling inner tube 8 moves downwards, the inner sampling tube 8 is prevented from retreating upwards under the action of pressure, the inner sampling needle 82 is downwards penetrated into tissue to be sampled, the inner sampling needle 82 is inserted to a proper depth and then the solid tube 4 is rotated clockwise, and the solid tube 4 drives the second push rod 3 to synchronously rotate, so that the second clamping block 34 is clamped with a rack on the rack plate 102; the solid tube 4 is then pulled upward to slide the second linkage slide 42 out of the secondary slot of the second linkage slide 32, and the solid tube 4 is then rotated counterclockwise to bring the second linkage slide 42 into the primary slot of the second linkage slide 32. Pushing down on the solid tube 4 allows the solid sampling needle 41 to pass through the inner sampling needle 82, completing the cutting of the tissue within the inner sampling needle 82. Then slowly loosening the solid tube 4, under the action of the inner spring 11, the solid tube 4 drives the solid sampling needle 41 to retract into the inner sampling needle 82, and after the solid tube 4 stops backing, the solid tube 4 rotates anticlockwise, and drives the first push rod 2 and the second push rod 3 to rotate, the second clamping block 23 and the rack plate 102 are separated from the clamping connection, and then the second push rod 3 is pulled upwards to enable the inner sampling needle 82 to be lifted and pulled out firstly, so that other places are prevented from being contacted with sampling tissues, the solid tube 4 is continuously rotated to enable the first clamping block 23 and the rack plate 102 to be separated from the clamping connection, then the outer sampling needle 51 is lifted upwards, the reset connecting rod 21 on the first reset assembly rotates and drives the corresponding reset gear 15 to rotate, and then the limit slider 12 is retracted into the mounting groove, so that the reset spring is released, the sampling tube 5 moves upwards, the shaft shoulder 52 slides upwards relative to the boss 61, the pressure of the limit slider 62 is reduced, the corresponding damping hole is enabled to be slid inwards, and finally the sampling tube 5 is lifted to an initial state. At the same time, the second reset component 31 is triggered under the action of the rotation of the second push rod 3, so that the sampling inner tube 8 is pulled out upwards, and then the sampling is completed.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. A puncture sampling device comprising a mounting (101), characterized in that: further comprises:

The hydraulic cylinder (1) is fixedly arranged on the mounting seat (101), and a sealing cavity is defined in the hydraulic cylinder (1);

the sampling device comprises a sampling tube (5) and a sampling needle; the sampling tube (5) is vertically and vertically slidably arranged on the hydraulic cylinder (1); two shaft shoulders (52) which are arranged at intervals are arranged on the side walls of the left side and the right side of the sampling tube (5), and the front side wall and the rear side wall are in sealing contact with the inner wall of the hydraulic cylinder (1); the upper end of the sampling tube (5) is provided with a first push rod (2), and the first push rod (2) extends upwards out of the hydraulic cylinder (1); the sampling needle is vertically fixed at the lower end of the sampling tube (5) and extends out of the hydraulic cylinder (1);

Two outer piston cylinders (6), wherein each outer piston cylinder (6) is arranged between two shaft shoulders (52) positioned at one side in a vertically sliding way, and the peripheral wall of the outer piston cylinder (6) is respectively in sealing contact with the inner wall of the hydraulic cylinder (1) and the outer wall of the sampling tube (5); the upper end of the outer piston cylinder (6) comprises a boss (61) protruding outwards; the inner surface of the boss (61) is in sealing contact with the outer surface of the shaft shoulder (52), and a sealed backstop cavity (62) is formed by the boss (61), the hydraulic cylinder (1), the hollow cavity between the shaft shoulder (52) and the sampling tube (5); damping holes communicated with the inside of the outer piston cylinder (6) are arranged on the upper end face and the lower end face of the outer piston cylinder (6);

The two outer retaining components comprise retaining sliding blocks (14) and limiting sliding blocks (12); the retaining slider (14) is arranged in the retaining cavity (62) and is slidably inserted into the boss (61) along the horizontal direction; the check slide block (14) is provided with a check valve which allows the check valve to pass through from bottom to top, so that when the check slide block (14) slides into the boss (61), the check valve is communicated with a damping hole at the upper end of the outer piston cylinder (6); the limit sliding block (12) is slidably arranged on the upper surface of the boss (61), and the upper surface is in an inclined plane shape with the height outside the insole; the inclined surface of the limit sliding block (12) is contacted with the lower surface of the shaft shoulder (52) and is connected with the boss (61) by an elastic mechanism, so that the limit sliding block (12) pops inwards when the one-way valve is communicated with the corresponding damping hole;

The device also comprises two first reset components;

The first reset assembly comprises a first reset spring (9), a reset connecting rod (21) and a reset gear (15); the first push rod (2) is rotatably arranged and installed on the sampling tube (5); the side wall of the limit sliding block (12) is of a rack structure; the reset gear (15) is rotatably arranged on the boss (61) and meshed with a rack on the limit sliding block (12) so as to drive the limit sliding block (12) to slide outwards when the reset gear (15) rotates; the reset connecting rod (21) is vertically arranged, the upper end of the reset connecting rod is fixedly connected with the first push rod (2), and the lower end of the reset connecting rod is of a tooth-shaped structure, so that the reset connecting rod (21) is meshed with the reset gear (15) when the limit sliding block (12) pops inwards; the first reset spring (9) is vertically arranged, the lower end of the first reset spring is fixed at the bottom of the hydraulic cylinder (1), and the upper end of the first reset spring is connected with the sampling tube (5) so that the first reset spring (9) compresses the power when the sampling tube (5) slides downwards.

2. A lancing sampling device according to claim 1, wherein:

A sampling inner tube (8) and a solid tube (4) are arranged in the sampling tube (5); the sampling inner tube (8) is vertically arranged, and the upper end of the sampling inner tube upwards extends out to form a second push rod (3) coaxial with the first push rod (2); the second push rod (3) is rotatably arranged on the sampling inner tube (8) and extends upwards to the outer side of the first push rod (2); the front side wall and the rear side wall of the sampling inner tube (8) are in sealing contact with the sampling tube (5); a first linkage assembly is arranged between the first push rod (2) and the second push rod (3) so as to drive the first push rod (2) to synchronously move downwards when the second push rod (3) moves downwards; the solid tube (4) can rotate and can be inserted in the sampling inner tube (8) in an up-down sliding way, is coaxial with the second push rod (3), and the upper end of the solid tube extends upwards to the outer side of the second push rod (3); a second linkage assembly is arranged between the solid pipe (4) and the second push rod (3) so as to drive the second push rod (3) to synchronously downwards when the solid rod downwards pushes; the sampling needle is divided into three layers, wherein the internal sampling needle is a solid sampling needle (41), the solid sampling needle (41) is fixedly connected with a solid tube (4), the upper end of an internal sampling needle (82) positioned in the middle is fixedly connected with a sampling inner tube (8), and an external sampling needle (51) positioned at the outermost side is fixedly connected with a sampling tube (5).

3. A lancing sampling device according to claim 2, wherein:

Two inner piston cylinders (7), two inner stop assemblies (71) and two second reset assemblies (31) are arranged between the sampling tube (5) and the sampling inner tube (8); two inner shaft shoulders (81) which are arranged at intervals are arranged on the left side wall and the right side wall of the sampling inner tube (8); the inner piston cylinder (7) and the outer piston cylinder (6) have the same structure and are slidably arranged between two inner shafts positioned on the same side; each inner piston cylinder (7) is provided with an inner backing component, and the inner backing component (71) and the outer backing component have the same structure; the second reset component (31) and the first reset component have the same structure and are used for connecting the second push rod (3) and the limit sliding block (12) of the inner stop component (71).

4. A lancing sampling device according to claim 3, wherein:

the first linkage assembly comprises a first linkage chute (22) and a first linkage strut (33); the first linkage chute (22) extends along the axial direction of the sampling tube (5), is arranged on the first push rod (2) at the outer side of the hydraulic cylinder (1), and the upper end side wall of the first linkage chute (22) extends out of the limit plate towards the other side; the first linkage slide column (33) is fixedly arranged on the second push rod (3) and is slidably inserted into the first linkage slide groove (22); the first linkage slide column (33) is in initial state and contacts with the upper surface of the blocking block.

5. The lancing sampling device of claim 4, wherein:

The second linkage assembly comprises a second linkage chute (32) and a second linkage strut (42); the second linkage chute (32) comprises a main chute body and a secondary chute body; the main groove body extends along the axial direction of the sampling inner tube (8) and is arranged on the second push rod (3) outside the first push rod (2); the auxiliary tank body and the main tank body are parallel to each other and are arranged on one side of the upper end of the main tank body, and the upper end of the main tank body is communicated with the auxiliary tank body; the second linkage slide column (42) is fixedly arranged on the solid tube (4) and can be slidably inserted into the second linkage slide groove (32), and the initial state of the second linkage slide column (42) is positioned in the auxiliary groove body.

6. The lancing sampling device of claim 5, wherein: further comprising a rack plate (102);

The rack plate (102) is provided with racks, the rack plate (102) is parallel to the axis of the sampling tube (5), is fixedly connected with the upper end of the hydraulic cylinder (1), and is positioned at the rear side of the sampling tube (5); a first clamping block (23) which can be clamped with a rack on the rack plate (102) is arranged on the first push rod (2); the second push rod (3) is provided with a second clamping block (34) which can be clamped with a rack on the rack plate (102).

7. A lancing sampling device according to claim 2, wherein:

an inner spring (11) is arranged between the solid tube (4) and the sampling inner tube (8); the upper end of the inner spring (11) is fixedly connected with the bottom of the solid tube (4), and the lower end is fixedly connected with the sampling inner tube (8).