CN108332986B - Sampling device and method - Google Patents
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- CN108332986B CN108332986B CN201810073014.4A CN201810073014A CN108332986B CN 108332986 B CN108332986 B CN 108332986B CN 201810073014 A CN201810073014 A CN 201810073014A CN 108332986 B CN108332986 B CN 108332986B
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- 238000005070 sampling Methods 0.000 title claims abstract description 190
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 239000008247 solid mixture Substances 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a sampling device and a method suitable for liquid or solid particles/powder or liquid-solid mixture in a gas-solid system or a gas-liquid-solid system, wherein the sampling device comprises a plugging member, a middle layer pipe sampling hole, an inner layer pipe sampling hole, a built-in baffle, an outer layer pipe, a middle layer pipe, an inner layer pipe and an anti-rotation rod; the sampling end and the shutoff component of outer pipe can be dismantled and be connected, the sampling end and the shutoff component of middle level pipe are connected, and the middle level pipe box is within outer pipe, the middle level pipe thief hole has been seted up on the middle level pipe thief end lateral wall, the inlayer pipe can be at the intraductal axial displacement of middle level, the port of inlayer pipe thief end is sealed, be provided with built-in baffle in the inlayer pipe thief end, be provided with the scale spout on the inlayer inside pipe wall, built-in baffle can slide along the scale spout, inlayer pipe thief hole has been seted up on the inlayer pipe lateral wall, form the sample recess between inlayer pipe thief end port and the built-in baffle, the sample gets into the sample recess through middle level pipe thief hole and inlayer pipe thief.
Description
Technical Field
The present invention relates to a sampling device and method for liquid or solid particles/powder or liquid-solid mixtures.
Background
In the prior art, the sampler for liquid and liquid-solid mixture can only take surface samples, but can not take samples deep therein, for example, samples in liquid-solid mixture, liquid with changed composition, etc., therefore, measured data such as particle liquid holdup, etc. are inaccurate, causing unnecessary experimental errors or economic loss.
When carrying out liquid-solid two-phase or gas-liquid-solid three-phase experiment, often need confirm the operating characteristic and the hydrodynamics performance of bed through observing the degree of wetting or the liquid holdup of granule, in order to guarantee accurate operating condition, need detect catalyst granule in the reactor, generally adopt the sampling tube to take a sample.
CN201561883 relates to a sampler for preventing gas leakage of a sample, wherein a cylinder body is required to be an integral structure at one end of a sample inlet and outlet and cannot be a detachable structure, and a safety clamp structure for preventing a sealing piston from falling is fixed on the cylinder body.
CN205785923U sealed liquid sampler that relates to includes the three-section body, passes through threaded connection between the body, all is equipped with the scale on the pipe wall, and sample head section bottom is equipped with the sleeve form, and the switch section is equipped with the valve, and the accessible is adjusted the length of middle linkage segment body and is controlled the degree of depth of taking a sample.
CN201527368U relates to a graduated sampling tube which is not a sleeve but is fixedly connected to a piston cylinder.
The telescopic powder sampler that CN205941062U relates to adopts double-deck sleeve pipe, and a plurality of thief holes that the design baffle separated in the sampling tube are equipped with telescopic handle at the inner tube rear end, can carry out the sample operation to the material of the different degree of depth, and the material only includes granule or powder.
The liquid sampling tube related to CN106644589A is relatively complex in structure, and comprises a shell component and a movable component, wherein the inside and the outside are communicated or sealed by utilizing the mutual movement between the two components, and the movable sleeve is connected to the end cover of the tube body through a screw thread or a bayonet so as to sample the moving liquid.
The liquid and solid-liquid mixture sampler related to CN202382961U adopts a detachable movable sleeve, can sample the liquid level in the vertical direction, and controls the sampling volume through the scale of the pipe wall.
Most comparatively complicated of sampling device's design structure at present, the commonality to different systems is relatively poor, is difficult to satisfy the demand of taking a sample in dynamic experiment, and the gas phase takes a sample the difficulty when having, consequently designs a convenient operation, simple structure, suitability strong liquid, solid particle/powder or liquid-solid mixture sampling device is the problem that needs the solution at present.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides the liquid, solid particle/powder or liquid-solid mixture sampling device with strong applicability, and has the characteristics of simple structure, convenient operation and capability of sampling the moving liquid, solid or liquid-solid mixture.
The specific technical scheme of the invention is as follows:
a sampling device comprises a plugging member, a middle-layer tube sampling hole, an inner-layer tube sampling hole, a built-in baffle, an outer-layer tube, a middle-layer tube, an inner-layer tube and an anti-rotation rod; the sampling end of the outer layer pipe is detachably connected with the plugging member, the sampling end of the middle layer pipe is connected with the plugging member, the middle layer pipe is sleeved in the outer layer pipe, a middle layer pipe sampling hole is formed in the side wall of the sampling end of the middle layer pipe, the diameter of the inner layer pipe is smaller than that of the middle layer pipe, the inner layer pipe can axially move in the middle layer pipe, one end, close to the plugging member, of the inner layer pipe is the sampling end of the inner layer pipe, the port of the sampling end of the inner layer pipe is sealed, a built-in baffle is arranged in the sampling end of the inner layer pipe, a scale sliding groove is formed in the inner wall of the inner layer pipe, the built-in baffle can slide along the scale sliding groove, the inner layer pipe sampling hole is formed in the side wall between the port of the sampling end of the inner layer pipe and the built-in baffle, and a; one end of the anti-rotation rod is fixedly connected with the outer layer pipe, and the other end of the anti-rotation rod is clamped in the limiting sliding groove.
Preferably, the plugging member is provided with a clamping groove, a gasket for sealing is arranged in the clamping groove, the sampling end of the outer layer pipe is provided with a connecting member, and the outer layer pipe is detachably connected with the plugging member through the connecting member and the clamping groove. The purpose of the detachable connection is that when sampling, the outer layer tube needs to be pulled out of the plugging component, and then the outer layer tube needs to be inserted into the plugging component.
Preferably, a sealing layer is arranged between the outer layer pipe and the middle layer pipe and between the middle layer pipe and the inner layer pipe, so that a sample is prevented from entering the pipes.
Preferably, the outer wall of the outer layer pipe is provided with a scale for displaying the length of the outer layer pipe, and the position where the outer layer pipe is connected with the blocking component is the starting point of the scale.
Preferably, the blocking member is conical, cylindrical, truncated conical, hemispherical or semi-ellipsoidal, and in particular conical blocking member, because of its pointed tip, is easily inserted into the sample. The plugging member is solid or hollow, the ratio of the area of the bottom surface of the connection of the plugging member and the outer layer pipe to the area of the cross section of the outer layer pipe is 1.2: 1-2.2: 1, and the plugging member can be guaranteed to be capable of sealing the outer layer pipe.
Preferably, the plugging member is welded or screwed with the middle pipe, and the connection mode is relatively easy to realize.
Preferably, when the sampling end of the inner layer pipe extends into the sampling end of the middle layer pipe, the distance between the sampling hole of the middle layer pipe and the plugging member is the same as the distance between the sampling hole of the inner layer pipe and the plugging member, so that the sampling hole of the middle layer pipe can be just opposite to the sampling hole of the inner layer pipe during sampling. The sampling hole of the middle layer pipe is consistent with the sampling hole of the inner layer pipe in shape and is a circular curved surface, an elliptic curved surface or a polygonal curved surface, and the area of the sampling hole of the middle layer pipe is larger than that of the sampling hole of the inner layer pipe.
Preferably, the sampling hole of the middle layer pipe and the sampling hole of the inner layer pipe are both square curved surfaces, so that the sampling amount is convenient to calculate.
Preferably, the outer layer pipe, the middle layer pipe, the inner layer pipe, the built-in baffle, the rotation preventing rod, the handle and the plugging member are made of stainless steel and are corrosion-resistant.
Preferably, the outer surface of the non-sampling end of the middle-layer pipe is fixedly connected with a rotating rod for rotating the middle-layer pipe, and the rotating rod is used as a stress point of the rotating middle-layer pipe, so that the middle-layer pipe is easy to rotate.
Preferably, the outer surface of the non-sampling end of the middle-layer pipe is provided with an annular scale for displaying an angle, the outer surface of the non-sampling end of the inner-layer pipe is provided with an identification mark at a position corresponding to the sampling hole of the inner-layer pipe, the relative position of the sampling hole of the middle-layer pipe and the sampling hole of the inner-layer pipe can be confirmed by observing the annular scale and the identification mark, for example, the circumferential position of the sampling hole of the middle-layer pipe is between 0 and 30 degrees of the annular scale, and when the identification mark corresponds to the annular scale between 0 and 30 degrees, the sampling hole of the middle-layer pipe is opposite to the sampling.
Preferably, the non-sampling end of the inner tube is connected with a handle.
The invention also aims to provide a sampling method, which comprises the following steps:
inserting the inner layer tube into the middle layer tube, enabling the distance between the sampling hole of the middle layer tube and the plugging member to be the same as the distance between the sampling hole of the inner layer tube and the plugging member, adjusting the position of the built-in baffle plate according to the volume of a sample to be sampled, inserting the sampling end of the sampling device into the sample, adjusting the depth of the sampling device into the sample according to the needs, observing the depth through the scale on the outer layer tube, axially drawing the outer layer tube away from the plugging member until the sampling hole of the middle layer tube is completely exposed in the sample, and in the process, because one end of the anti-rotation rod is limited in the limiting sliding chute, the outer layer tube can only axially move relative to the inner layer tube and can not circumferentially move; rotating the middle-layer pipe to enable the sampling hole of the middle-layer pipe to be opposite to the sampling hole of the inner-layer pipe, exposing the sampling groove in the sample, and enabling the sample to enter the sampling groove under the action of gravity and pressure until the sampling groove is filled; rotating the middle-layer tube again to enable the sampling hole of the middle-layer tube and the sampling hole of the inner-layer tube to be staggered, pushing the outer-layer tube to be inserted into the clamping groove of the plugging member, isolating the middle-layer tube from the sample, and preventing the sample from entering the tube space and even being flushed out under the action of pressure; and (4) drawing out the inner-layer tube until the sample is taken out of the sampling device, and finally obtaining the sample.
The invention has the advantages that: the sampling device has the advantages of simple structure, convenient operation and strong universality, can accurately perform sampling operation in a dynamic experiment, goes deep into a sample, obtains the sample with required depth, and is suitable for sampling liquid or solid particles/powder or liquid-solid mixture in a gas-solid system or a gas-liquid-solid system. The sampling device is particularly suitable for sampling liquid, solid particles, powder and liquid-solid mixtures in reaction of stirred tanks, fluidized beds, moving beds, fixed beds and the like in laboratories, and can also be used for sampling industrial devices.
Drawings
FIG. 1: the plugging component is in a hemispherical shape, and the sampling hole of the middle layer pipe and the sampling hole of the inner layer pipe are in a structural schematic diagram of a sampling device with a circular curved surface;
FIG. 2: the plugging member is a cuboid, and the sampling hole of the middle layer tube and the sampling hole of the inner layer tube are in a structural schematic diagram of a sampling device with a square curved surface;
FIG. 3: the structure schematic diagram of the sampling device;
FIG. 4: the structure of the sampling device is split schematically;
fig. 5 (a): a schematic plan view of a hemispherical plugging member; fig. 5 (b): a schematic plan view of a truncated cone-shaped plugging member; fig. 5 (c): a schematic plan view of a conical plugging member; fig. 5 (d): a schematic plan view of a cylindrical occlusion member; fig. 5 (e): a schematic plan view of a cuboid plugging member; fig. 5 (f): a schematic plane view of a frustum-shaped plugging member;
fig. 6 (a): a cuboid plugging component is connected with the middle layer pipe in a three-dimensional view; fig. 6 (b): a cylindrical plugging member is connected with the middle layer pipe in a three-dimensional view; fig. 6 (c): a conical plugging member is connected with the middle layer pipe in a three-dimensional view; fig. 6 (d): a frustum-shaped plugging member is connected with the middle layer pipe in a three-dimensional view; fig. 6 (e): the semicircular plugging member is connected with the middle layer pipe in a three-dimensional view; fig. 6 (f): a semi-elliptical plugging member and a middle layer pipe are connected in a three-dimensional view; fig. 6 (g): a triangular pyramid-shaped plugging member is connected with the middle layer pipe in a three-dimensional view; fig. 6 (h): a connecting stereogram of the truncated cone-shaped plugging member and the middle layer pipe; fig. 6 (i): a pentagonal prism-shaped plugging member and a middle layer pipe are connected in a three-dimensional view.
Reference numerals: 1 a plugging member; 2, a clamping groove; 3, a middle layer pipe sampling hole; 4 inner layer tube sampling hole; 5, a baffle is arranged in the shell; 6 outer layer pipes; 7, scaling; 8 sealing layer; 9 middle layer tube; 10 rotating the rod; 11 inner layer tube; 12, a rotation preventing rod; 13 a handle.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 3 and 4, a sampling device comprises a plugging member 1, a middle layer tube sampling hole 3, an inner layer tube sampling hole 4, a built-in baffle 5, an outer layer tube 6, a middle layer tube 9, an inner layer tube 11 and an anti-rotation rod 12; the plugging member 1 is conical, and is easy to insert into a sample due to the pointed top of the plugging member 1. The plugging member 1 is provided with a clamping groove 2, a gasket for sealing is arranged in the clamping groove 2, a sampling end of the outer layer pipe 6 is provided with a connecting member, and the outer layer pipe 6 is detachably connected with the plugging member 1 through the connecting member and the clamping groove 2. The purpose of the detachable connection is that, during sampling, the outer tube 6 needs to be pulled out of the plugging member 1, and then the outer tube 6 needs to be inserted back into the plugging member 1. The sampling end of the middle layer tube 9 is welded or screwed with the plugging component 1, the middle layer tube 9 is sleeved in the outer layer tube 6, the side wall of the sampling end of the middle layer tube 9 is provided with a middle layer tube sampling hole 3, the diameter of the inner layer tube 11 is smaller than that of the middle layer tube 9, and the inner layer tube 11 can move axially in the middle layer tube 9, one end of the inner layer tube 11 close to the plugging member 1 is a sampling end of the inner layer tube 11, the port of the sampling end of the inner layer tube 11 is sealed, a built-in baffle 5 is arranged in the sampling end of the inner layer tube 11, a scale chute is arranged on the inner wall of the inner layer tube 11, the built-in baffle 5 can slide along the scale chute, an inner layer tube sampling hole 4 is arranged on the side wall between the port of the sampling end of the inner layer tube 11 and the built-in baffle 5, when the sampling end of the inner layer tube 11 extends into the sampling end of the middle layer tube 9, the distance between the sampling hole 3 of the middle layer tube and the plugging member 1 is the same as the distance between the sampling hole 4 of the inner layer tube and the plugging member 1, so that the sampling hole 3 of the middle layer tube can be just opposite to the sampling hole 4 of the inner layer tube during sampling. The middle layer pipe sampling hole 3 and the inner layer pipe sampling hole 4 are identical in shape and are both square curved surfaces, and the area of the middle layer pipe sampling hole 3 is larger than that of the inner layer pipe sampling hole 4. A sampling groove is formed between the port of the sampling end of the inner-layer tube 11 and the built-in baffle 5, and a limiting sliding groove is axially formed on the outer surface of the non-sampling end of the inner-layer tube 11; one end of the anti-rotation rod 12 is fixedly connected with the outer layer pipe 6, and the other end is clamped in the limiting sliding groove. And sealing layers 8 are arranged between the outer layer pipe 6 and the middle layer pipe 9 and between the middle layer pipe 9 and the inner layer pipe 11 to prevent the sample from entering the pipe space. The outer wall of the outer layer pipe 6 is provided with a scale 7 for displaying the length of the outer layer pipe 6, the position where the outer layer pipe 6 is connected with the plugging member 1 is the starting point of the scale, and the design aims to accurately grasp the depth of the sampling device inserted into a sample. The outer layer pipe 6, the middle layer pipe 9, the inner layer pipe 11, the built-in baffle 5, the anti-rotation rod 12, the handle 13 and the plugging member 1 are made of stainless steel and are corrosion-resistant.
In an embodiment, the plugging member 1 is solid or hollow, the ratio of the area of the bottom surface of the connection between the plugging member 1 and the outer layer pipe 6 to the cross-sectional area of the outer layer pipe 6 is 1.2:1 to 2.2:1, and the plugging member 1 can be ensured to be capable of sealing the outer layer pipe 6.
As an embodiment, an annular scale for displaying an angle is arranged on the outer surface of the non-sampling end of the middle-layer tube 9, an identification mark is arranged at a position of the outer surface of the non-sampling end of the inner-layer tube 11 corresponding to the sampling hole 4 of the inner-layer tube, the relative positions of the sampling hole 3 of the middle-layer tube and the sampling hole 4 of the inner-layer tube can be confirmed by observing the annular scale and the identification mark, for example, the circumferential position of the sampling hole 3 of the middle-layer tube is between 0 and 30 degrees of the annular scale, and when the identification mark corresponds to the annular scale between 0 and 30 degrees, the sampling hole 3 of the middle-layer tube is over against the; when the identification mark is staggered from the annular scale by 0-30 degrees, the sampling hole 3 of the middle layer tube is staggered from the sampling hole 4 of the inner layer tube.
The plugging member of the embodiment shown in fig. 1 is hemispherical, and the sampling hole of the middle layer tube and the sampling hole of the inner layer tube are circular curved surfaces.
The plugging member of the embodiment shown in fig. 2 is a cuboid, and the sampling hole of the middle layer tube and the sampling hole of the inner layer tube are square curved surfaces.
The embodiments shown in fig. 5(a) to 5(f) are hemispherical, truncated cone, conical, cylindrical, rectangular parallelepiped and truncated cone shaped plugging members, respectively.
The embodiments shown in fig. 6(a) to 6(i) are respectively a rectangular parallelepiped-shaped plugging member, a cylindrical plugging member, a conical plugging member, a frustum-shaped plugging member, a semicircular plugging member, a semi-elliptical-shaped plugging member, a triangular pyramid-shaped plugging member, a frustum-shaped plugging member, and a pentagonal prism-shaped plugging member, which are connected to the middle-layer pipe.
The invention relates to a sampling method, which comprises the following steps:
inserting an inner layer tube 11 into an intermediate layer tube 9, enabling the distance between a sampling hole 3 of the intermediate layer tube and a plugging member 1 to be the same as the distance between a sampling hole 4 of the inner layer tube and the plugging member 1, adjusting the position of an internal baffle 5 according to the volume of a sample to be sampled, inserting the sampling end of a sampling device into the sample, wherein the sample can be liquid or solid particles/powder or liquid-solid mixture in a gas-solid system or a gas-liquid-solid system, adjusting the depth of the sampling device to be inserted into the sample according to needs, axially drawing an outer layer tube 6 away from the plugging member 1 until the sampling hole 3 of the intermediate layer tube is completely exposed in the sample, and in the process, because one end of a rotation preventing rod 12 is limited in a limiting sliding chute, the outer layer tube 6 can only axially move relative to the inner layer tube 11 and; rotating the middle layer pipe 9 to enable the middle layer pipe sampling hole 3 to be opposite to the inner layer pipe sampling hole 4, exposing the sampling groove in the sample, and enabling the sample to enter the sampling groove under the action of gravity and pressure until the sampling groove is filled; rotating the middle-layer tube 9 again to enable the sampling hole 3 of the middle-layer tube and the sampling hole 4 of the inner-layer tube to be staggered, pushing the outer-layer tube 6 to be inserted into the clamping groove 2 of the plugging member 1, isolating the middle-layer tube 9 from the sample, and preventing the sample from entering the tube space and even being flushed out under the action of pressure; the inner tube 11 is withdrawn until the sample is taken out of the sampling device, and finally the sample is taken.
The above-described embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, the technical scheme obtained by adopting the mode of equivalent replacement or equivalent transformation is within the protection scope of the invention.
Claims (5)
1. A sampling device is characterized by comprising a plugging member (1), a middle-layer tube sampling hole (3), an inner-layer tube sampling hole (4), a built-in baffle (5), an outer-layer tube (6), a middle-layer tube (9), an inner-layer tube (11) and an anti-rotation rod (12);
the sampling end of the outer layer pipe (6) is detachably connected with the plugging member (1), the outer wall of the outer layer pipe (6) is provided with a scale (7) for displaying the length of the outer layer pipe (6), and the position where the outer layer pipe (6) is connected with the plugging member (1) is a scale starting point; the sampling end of the middle-layer pipe (9) is connected with the plugging member (1) by welding or threads, the middle-layer pipe (9) is sleeved in the outer-layer pipe (6), the side wall of the sampling end of the middle-layer pipe (9) is provided with a middle-layer pipe sampling hole (3), the outer surface of the non-sampling end of the middle-layer pipe (9) is fixedly connected with a rotating rod (10) for rotating the middle-layer pipe (9), and the outer surface of the non-sampling end of the middle-layer pipe (9) is provided with annular scales for displaying angles; the diameter of the inner layer pipe (11) is smaller than that of the middle layer pipe (9), the inner layer pipe (11) can axially move in the middle layer pipe (9), one end of the inner layer pipe (11) close to the plugging member (1) is a sampling end of the inner layer pipe (11), a port of the sampling end of the inner layer pipe (11) is sealed, a built-in baffle (5) is arranged in the sampling end of the inner layer pipe (11), a scale sliding groove is arranged on the inner wall of the inner layer pipe (11), the built-in baffle (5) can slide along the scale sliding groove, an inner layer pipe sampling hole (4) is formed in the side wall between the sampling end port of the inner layer pipe (11) and the built-in baffle (5), a sampling groove is formed between the sampling end port of the inner layer pipe (11) and the built-in baffle (5), a limiting sliding groove is axially formed in the outer surface of the non-sampling end of the inner layer pipe (11), and a position, corresponding to the sampling hole (4), of the outer, the non-sampling end of the inner layer tube (11) is connected with a handle (13); one end of the anti-rotation rod (12) is fixedly connected with the outer layer pipe (6), and the other end of the anti-rotation rod is clamped into the limiting sliding groove.
2. A sampling device according to claim 1, characterized in that sealing layers (8) are arranged between the outer tube (6) and the middle tube (9), and between the middle tube (9) and the inner tube (11); the plugging member (1) is provided with a clamping groove (2), a gasket for sealing is arranged in the clamping groove (2), the sampling end of the outer layer pipe (6) is provided with a connecting member, and the outer layer pipe (6) is detachably connected with the plugging member (1) through the connecting member and the clamping groove (2).
3. The sampling device according to claim 1, characterized in that the plugging member (1) is conical, cylindrical, truncated cone-shaped, hemispherical or semi-ellipsoidal, the plugging member (1) is solid or hollow, and the ratio of the area of the bottom surface of the connection of the plugging member (1) and the outer tube (6) to the cross-sectional area of the outer tube (6) is 1.2:1 to 2.2: 1.
4. The sampling device according to claim 1, characterized in that when the sampling end of the inner tube (11) extends into the sampling end of the middle tube (9), the distance between the sampling hole (3) of the middle tube and the plugging member (1) is the same as the distance between the sampling hole (4) of the inner tube and the plugging member (1), the sampling hole (3) of the middle tube and the sampling hole (4) of the inner tube have the same shape and are both circular curved surface, elliptic curved surface or polygonal curved surface, and the area of the sampling hole (3) of the middle tube is larger than that of the sampling hole (4) of the inner tube.
5. A sampling method of a sampling device according to claim 1, characterized by the steps of:
inserting an inner layer tube (11) into a middle layer tube (9), enabling the distance between a middle layer tube sampling hole (3) and a plugging member (1) to be the same as the distance between an inner layer tube sampling hole (4) and the plugging member (1), adjusting the position of an internal baffle (5) according to the volume of a sample to be sampled, inserting the sampling end of a sampling device into the sample, wherein the sample is liquid or solid particles/powder or liquid-solid mixture in a gas-solid system or a gas-liquid-solid system, adjusting the depth of the sampling device required to be inserted into the sample according to the requirement, axially drawing an outer layer tube (6) away from the plugging member (1) until the middle layer tube sampling hole (3) is completely exposed in the sample, and in the process, because one end of a rotation preventing rod (12) is limited in a limiting sliding chute, the outer layer tube (6) can only axially move relative to the inner layer tube (11) and can not circumferentially move; rotating the middle layer pipe (9) to enable the middle layer pipe sampling hole (3) to be opposite to the inner layer pipe sampling hole (4), exposing the sampling groove in the sample, and enabling the sample to enter the sampling groove under the action of gravity and pressure until the sampling groove is filled; rotating the middle-layer tube (9) again to enable the sampling hole (3) of the middle-layer tube and the sampling hole (4) of the inner-layer tube to be staggered, pushing the outer-layer tube (6) to be inserted into the clamping groove (2) of the plugging member (1), isolating the middle-layer tube (9) from the sample, and preventing the sample from entering the tube space and even being flushed out under the action of pressure; the inner tube (11) is drawn out until the sample is taken out of the sampling device, and finally the sample is taken out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810073014.4A CN108332986B (en) | 2018-01-25 | 2018-01-25 | Sampling device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810073014.4A CN108332986B (en) | 2018-01-25 | 2018-01-25 | Sampling device and method |
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| CN108332986A CN108332986A (en) | 2018-07-27 |
| CN108332986B true CN108332986B (en) | 2020-07-17 |
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| CN109030078B (en) * | 2018-09-03 | 2021-05-04 | 江苏铭城建筑设计院有限公司 | Soil sampler |
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| CN111493942B (en) * | 2020-05-28 | 2024-06-04 | 中国医科大学 | Medical totally enclosed pathological sampling device |
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