CN108760396A - The sludge sampling method of this kind of sampler of rarefaction sludge depth sampler and application - Google Patents
The sludge sampling method of this kind of sampler of rarefaction sludge depth sampler and application Download PDFInfo
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- CN108760396A CN108760396A CN201810892847.3A CN201810892847A CN108760396A CN 108760396 A CN108760396 A CN 108760396A CN 201810892847 A CN201810892847 A CN 201810892847A CN 108760396 A CN108760396 A CN 108760396A
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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
- G01N1/12—Dippers; Dredgers
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Abstract
The invention discloses a kind of sludge sampling methods of this kind of sampler of rarefaction sludge depth sampler and application, belong to sludge sampling device and sampling method technical field, it is intended to solve the problems, such as that grab sample in the prior art is not easily high by the sample representativeness of such environmental effects, acquisition.Its key points of the technical solution are that removable end seal head is arranged in the bottom end of probe tube, top is hingedly provided with capping；The inner cavity of probe tube is provided with elastic locking part, and capping top surface is connect with driving part, and the top of probe tube is additionally provided with connecting component.The sampler structure of the present invention is simple, and manufacturing cost is low and easy to use, small by such environmental effects such as flow size, mud viscosity, is suitable for carrying out depthkeeping sampling in the thin place of the big mud of water flow.The present invention accordingly discloses a kind of sludge sampling method using above-mentioned sampler, the high advantage of simple with operating procedure, acquisition sample representativeness.
Description
Technical field
The present invention relates to a kind of sludge sampling device and sampling methods, more specifically, it relates to which a kind of rarefaction sludge is fixed
The sludge sampling method of this kind of sampler of deep sampler and application.
Background technology
Sludge sampling is to study the rule of accumulation, distribution, conversion and migration of the pollutant for being discharged into water body in bed mud
Rule, is a kind of investigative technique for being widely used in the fields such as environment, the hydrology.It is a variety of more for the sampling equipment of mud at present
Sample can use circular cone type sampler, drill-bit type sampler, suspended type sampler etc. to sandy bed mud；When being cobble to bed mud, spade is used
Formula sampler, the sampling of clamshell sampler.
And when the water bottoms rarefaction sludge such as acquire lake, river, take sample grab bucket crawl surface layer mud sample more.This kind
Sampling method, although easy to operate, it samples easy to be affected by environment.It is sampled in the environment that flow is big, mud is thin
When, the sample of acquisition is easy to be broken up by water currents, and the sample of acquisition does not have representativeness.Moreover, this kind is grabbed with grab bucket
It takes surface layer mud as the sample mode of sample, the difference of different depth level mud can not be longitudinally compared by the sample of acquisition
Not.
Therefore, against the above deficiency, the present invention provides this kind of sampler of a kind of rarefaction sludge depth sampler and application
Sludge sampling method.
Invention content
In view of the deficiencies of the prior art, the present invention intends to provide a kind of rarefaction sludge depth sampler,
With it is simple in structure, easy to use and by such environmental effects it is small, suitable for being determined in the thin place of the big mud of water flow
The advantage sampled deeply.
To achieve the above object, the present invention provides following technical solutions：
The bottom end of a kind of rarefaction sludge depth sampler, including probe tube, the probe tube is detachably provided with end seal head, top
Hingedly it is provided with capping；It further include the snap lock for being set to the inner cavity of probe tube and being used to that capping to be driven to close probe tube top end opening
Gu component, and it is connected to the driving part that capping top surface is used to drive capping rotating opening；The top of the probe tube is also set up
It is useful for the connecting component being connect with bit pressure equipment.
It, will using connecting component is first passed through before the sampler progress depthkeeping sampling of the present invention by using above-mentioned technical proposal
Depth sampler is connected with bit pressures equipment such as manual augers, and sampler bottom end is then vertically to insertion downward by bit pressure equipment
Mud to be sampled, until designated depth.After device to be sampled is inserted in place, the capping being hingedly arranged by driving part manipulation is upward
Rotation, to open the top end opening of probe tube.Thin mud, can be voluntarily from the top end opening of probe tube due to good fluidity
It flows into probe tube.After the top end opening one end time in the open state for keeping probe tube, release driving part is to capping
Drag force.Under the action of elastic locking part, capping is rotated backward to by the top of probe tube and is blocked.Again by bit pressure equipment
Probe tube entirety is extracted out out of mud.Due to the barrier effect of capping during extraction sampler, collected sample is not
It easily overflows and is even broken up by flow etc..Sampling is captured compared to conventional grab bucket, to the better adaptability of environment, is particularly suitable for
The sampling of the rarefaction sludge environment of the water flows general goal such as river, lake.And it according to the difference of sampler insertion depth, may be implemented
Sampling to the mud of different depth position.Meanwhile sampler of the invention is with simple in structure, manufacturing cost is low, makes
With easily advantage.
Further, the end seal head includes coniform ontology and circular interconnecting piece, the ontology of the end seal head
It is detachably fixed connection by the bottom end of interconnecting piece and probe tube.
By using above-mentioned technical proposal so that resistance smaller when sampler is inserted into mud does not easily cause in insertion process
Sampler axis runout vertical direction is not easy to damage sampler.
Further, internal thread, the excircle side wall of the probe tube are provided on the inner circumferential side wall of the interconnecting piece
On be provided with for the external screw thread with the screw-internal thread fit.
By using above-mentioned technical proposal, after completing sample collection, rotation can remove the end seal head for sampling tube end,
It is simple and convenient to pour out the sample in probe tube.After cleaning out end seal head after the completion of use, using internal thread and outside
The cooperation of screw thread is connected to the bottom end of probe tube.
Further, the elastic locking part includes the locking consistent with the axis direction of probe tube of several elastic force directions
Spring, the locking spring one end is fixedly connected on the bottom wall of capping, the other end is fixedly connected on the inner circumferential side wall of probe tube.
By using above-mentioned technical proposal, when driving capping rotation by driving part, locking spring is stretched, and release is driven
After dynamic component is to the drag force of capping, locking spring restores deformation so that capping automatically resets to by the top end opening of probe tube
Closed state.
Further, the driving part includes being fixedly installed on the fixed ring of capping top surface and being fixedly connected on fixation
Drawstring on ring.
By using above-mentioned technical proposal, by the rotation not only simple operation of drawstring control capping, but also length is adjustable
Section, is not easy to be interfered by environmental factor.The drawstring of waterproof anticorrosive material is selected, service life is long, by factors such as the depth of water, mud depth
Influence it is small, be less prone to interim card and cause capping that can not open, and replace it is convenient.
Further, the fixed ring is set to capping top surface far from capping articulated position side.
By using above-mentioned technical proposal, when pulling drawstring driving capping rotating opening, torque bigger, driving capping is opened
Operation it is more effortless, can be adapted for being operated under the conditions of different viscosity mud.
Further, the connecting component includes fixed disk, connecting rod and several axis directions and sampler axis side
To consistent fixed link；The fixed link is along the circumferential equidistantly distributed of sampler, and the excircle of sampler is fixed in one end
Side wall, the other end are fixedly connected with fixed disk；The connecting rod is perpendicular to the top surface of fixed disk, fixed setting and in fixed disk
At the geometric center of top surface.
By using above-mentioned technical proposal, on the one hand fixed disk is fixedly connected with probe tube by more fixed links, even
It is firm to connect.During sampler is inserted into mud, it is less prone to deformation.On the other hand, connecting rod is perpendicular to fixed disk and position
At the top surface geometric center of fixed disk, it can make during sampler is pressed into mud using bit pressure equipment, force side
It is not only laborsaving but also be not easy to cause a deviation to substantially axially coincident with probe tube.
Further, the fixed link is provided with three altogether.
By using above-mentioned technical proposal so that fixed disk installation is firm, and torsion is less prone to during underthrust sampler
Turn, deformation etc., at the same utmostly reduce because fixed link, fixed disk presence caused by sampler underthrust resistance.
Further, the bottom end outer diameter of the probe tube is less than top outer diameter.
By using above-mentioned technical proposal resistance smaller when mud is inserted into compared to columned probe tube, it is easier to
Sampler is accurately inserted into designated depth, carries out sampling at set depth.
In view of the deficienciess of the prior art, another object of the present invention is to provide a kind of rarefaction sludge depthkeeping sampling sides
Method, with it is easy to operate, may be implemented under the big mud lean conditions of water flow it is accurate sample, the sample representativeness of acquisition it is high
Advantage.
To achieve the above object, the present invention provides following technical solutions：
A kind of rarefaction sludge depthkeeping sampling method carries out depthkeeping sampling using above-mentioned rarefaction sludge depth sampler, specifically includes
Following steps,
Step 1: sampler is fixedly connected with bit pressure device by connecting component；
Step 2: being inserted into mud with the head-down state of end seal using bit pressure device driving sampler, until designated depth；
Step 3: drive the capping on probe tube top to open by driving part, and a period of time is maintained so that mud is from sampling
The top end opening of pipe flows into probe tube；
Step 4: releasing the effect of driving part, is covered under the action of elastic locking part and seal the opening on probe tube top
It closes；
Step 5: after taking out sampler using bit pressure device driving sampler rollback, probe tube bottom end end seal head is removed, you can fall
Go out the mud sample of acquisition；
Step 6: after sealing label up for safekeeping to the mud sample of acquisition, end seal head is reinstalled to the bottom end of probe tube；
Step 7: after sampler is cleaned out, step 2 is repeated to step 6, the mud of different depth is sampled.
By using above-mentioned technical proposal, operating procedure is simple, in the sampling operation of water flow greatly, under mud lean environment
It is influenced by environmental factor small, ensure that the representativeness of the sample of acquisition.Meanwhile it may be implemented to different depths by this kind of method
The acquisition for spending region mud sample has better eurytopicity compared to traditional grab bucket crawl sampling.
In conclusion the invention has the advantages that：
1, sampler structure of the invention is simple, and after being inserted into the designated depth of mud, capping can be manipulated by driving part
Rotation so that mud can from probe tube top end opening flow into probe tube in, release driving part to after the drag force of capping in bullet
Property locking part under the action of, capping, which can automatically rotate to, will sample duct occlusion, extract the silt that acquires during sampler out
Mud sample product are not easy to be washed away by flow, ensure that the representativeness of acquisition sample, adopting mud lean environment under big suitable for water flow
Sample；
2, it by the unlatching of drawstring manipulation capping, not only simple operation, but also is limited by environmental factors such as the depth of water, silt depths
It is few；
3, rarefaction sludge depthkeeping sampling method disclosed by the invention, operating procedure is simple, water flow is big, under mud lean environment
Sampling operation influenced by environmental factor small, ensure that the representativeness of the sample of acquisition, while can be real by this kind of method
Now to the acquisition of different depth region mud sample, there is better eurytopicity compared to traditional grab bucket crawl sampling.
Description of the drawings
Fig. 1 is the structural schematic diagram of rarefaction sludge depth sampler in embodiment 1；
Fig. 2 is the sectional view that rarefaction sludge determines body sampler in embodiment 1；
Fig. 3 is the enlarged drawing of part A in Fig. 2；
Fig. 4 is the enlarged drawing of part B in Fig. 2.
In figure：1, probe tube；11, external screw thread；12, fixed block；2, end seal head；21, ontology；22, interconnecting piece；221, interior spiral shell
Line；3, it covers；31, fixed ring；4, lock spring；5, drawstring；6, fixed link；7, fixed disk；8, connecting rod.
Specific implementation mode
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment 1
A kind of rarefaction sludge depth sampler, referring to Fig.1 comprising the probe tube 1 of hollow cylindrical, the bottom end of probe tube 1 can
Dismounting is fixedly installed end seal head 2, top is provided with the capping 3 of the rondelle for closing 1 top end opening of probe tube, Yi Jiyong
In the connecting component for being fixedly connected with sampler with bit pressure device.
With reference to Fig. 2 and Fig. 3, end seal head 2 includes circular interconnecting piece 22 and coniform ontology 21.Interconnecting piece 22 it is interior
It is provided with internal thread 221 on circumferential side wall, internal thread 221 is provided on the excircle side wall of 1 bottom end of probe tube.By end seal head 2
It is set in the bottom end of probe tube 1, is screwed, by the cooperation of internal thread 221 and external screw thread 11, end seal head 2 can be fixedly mounted
In the bottom end of probe tube 1.During sampler is inserted into mud, the coniform ontology 21 of end seal head 2, which has, reduces underthrust resistance
Power, the effect that mud is inserted into convenient for sampler.After the completion of sample collection, rotation can remove end seal head 2 so that pour out acquisition
Sample it is easy to operate.
With reference to Fig. 2 and Fig. 4, the opening on 1 top of probe tube is provided with the capping 3 of covering 1 top end opening of probe tube, capping
3 are hingedly arranged with the countershaft of probe tube 1.Capping 3 can be rotated in a vertical plane around articulated position, to control the top of probe tube 1
End opening is turned on and off.
With reference to Fig. 2 and Fig. 4, it is articulated and connected by shaft between disk-shaped capping 3 and the excircle side wall of probe tube 1.
The elastic direction of the setting locking spring 4 consistent with the axis direction of probe tube 1 in probe tube 1.Lock spring 4 in the present embodiment
It is provided at one, and the top for the spring 4 that locks is connected to 3 bottom surfaces of capping far from articulated position side, bottom end passes through in probe tube 1
Fixed block 12 on side wall is fixedly connected.The elastic force direction of locking spring 4 is consistent with the axis direction of probe tube 1, not to envelope
Under the premise of lid 3 applies external force, due to the presence for the spring 4 that locks, capping 3 is in the shape of the closure of openings on 1 top of probe tube
State.
With reference to Fig. 2 and Fig. 4, the top for covering 3 is also associated with driving part, and driving part includes being fixed at capping 3
The fixed ring 31 of top surface and the drawstring 5 being fixedly connected with fixed ring 31.In order to enable more effortless, fixed ring 31 when pulling capping
3 top surfaces of capping are set to far from articulated position side.The material that drawstring 5 can select strength good, resistant to chemical etching, such as：Poly- second
Alkene, polypropylene, carbon fiber etc., select polypropylene fiber rope in the present embodiment.When being sampled operation, pass through manual pull drawstring
5,3 rotation of capping, the opening on 1 top of probe tube can be driven to open, mud can flow into probe tube from 1 top end opening of probe tube
In 1.After the drag force for discharging drawstring 5, under the action of locking spring 4, capping 3 can be automatically rotated to 1 top of probe tube
Closure of openings.
With reference to Fig. 2 and Fig. 4, when being sampled operation, need by external motivating force to drive sampler to be inserted into or take out
From mud, thus need to connect with bit pressures equipment such as manual augers.In order to which sampler is connect with bit pressure equipment, probe tube 1
Top is also fixedly connected with connecting component.Connecting component include be parallel to capping 3 setting fixation disk 7, for will fix disk 7 with
Several fixed links 6 that probe tube 1 is fixedly connected and the connecting rod 8 for sampler to be fixedly connected with bit pressure equipment.This
Fixed link 6 is provided with three altogether in embodiment, and along the circumferential equidistantly distributed of probe tube 1.6 one end of fixed link and probe tube 1
Excircle side wall between be welded and fixed, be welded and fixed between the other end and the excircle side wall of fixed disk 7 so that fixed disk 7
Remain parallel to capping 3 and the state of axis and capping 3 axis coincidence.Reserved between fixed disk 7 and capping 3 simultaneously enough away from
From for covering 3 rotating openings.Connecting rod 8 is fixedly welded on the top surface geometry of fixed disk 7 perpendicular to the top surface of fixed disk 7
At center.The one end of connecting rod 8 far from fixed disk 7 is additionally provided with screw thread, in order to be fixedly connected with bit pressure equipment.
Operation principle is as follows：
The structure of the rarefaction sludge sampler of the present invention is simple, and manufacturing cost is low and easy to use.When sampling, by bit pressure
After sampler is inserted into the designated depth of mud by equipment, the drawstring 5 by being connected to 3 top surfaces of capping pulls capping 3.Capping 3
It is rotated around articulated position, the top end opening of probe tube 1 is opened, while locking spring 4 by drawstring 5 during covering 3 rotations.It takes
After the top end opening of sample pipe 1 is opened, mud can be flowed into voluntarily from the top open part of probe tube 1 in probe tube 1.Keep probe tube
1 opening in open state for a period of time after, unclamp drawstring 5, discharge to capping 3 drag force.At this point, locking spring 4 restores
Deformation closes the top end opening of probe tube 1 so that capping 3 turns to, then by bit pressure equipment by sampler from mud
It is detached in layer.Since the presence for the spring 4 that locks, the top end opening of probe tube 1 are in closed state always during detaching so that
It will not be influenced by flow, the factors such as flowing of mud, acquired sample will not be broken up by flow, the sample representativeness of acquisition
It is high.When needing to acquire the mud sample of different depth, sampler is inserted into designated depth, is captured compared to traditional grab bucket
Sampling limit less by environmental factor, the sample representativeness that acquire height and can acquire mud sample progress at different depth
Longitudinal comparison, sampler of the invention are particularly suitable for the sampling of the rarefaction sludge in the lake big to water flow, river etc..
Embodiment 2
A kind of rarefaction sludge depth sampler, embodiment 2 based on embodiment 1, with embodiment 1 difference lies in：Sampling
The bottom end outer diameter of pipe 1 is less than the top outer diameter of probe tube 1, in big inverted round table-like of the small tip size of bottom end size so that
Sampler is during being inserted into mud, resistance smaller, and the specified depth that mud is inserted under vertical state is kept conducive to sampler
Degree carries out depthkeeping sampling.
Embodiment 3
A kind of rarefaction sludge depthkeeping sampling method, the present embodiment are carried out by rarefaction sludge depth sampler described in embodiment 1
Depthkeeping samples, and specifically comprises the following steps,
Step 1: the connecting rod 8 of sampler is connect with manual auger；
Step 2: being inserted into mud with 2 state directed downwardly of end seal head using manual auger driving sampler, until designated depth；
Step 3: after sampler is inserted into designated depth, pulling drawstring 5 makes the capping 3 on 1 top of probe tube overcome locking spring 4
Elastic force rotated around its hinge joint, the top end opening of probe tube 1 is opened, and the state for pulling capping 3 is maintained to make mud for a period of time
Voluntarily flow into probe tube 1；
Step 4: drag force of the release drawstring 5 to capping 3, locking spring 4 restores deformation and makes capping 3 by 1 top of probe tube
Closure of openings；
Step 5: driving sampler to detach mud using manual auger；Remove 1 bottom end end seal head 2 of probe tube, you can pour out and adopt
The mud sample of collection；
Step 6: the mud sample to acquisition is sealed up for safekeeping, after label, end seal head 2 is reinstalled to the bottom end of probe tube 1；
Step 7: after sampler is cleaned out, repetitive operation step 2 to step 6 adopts the mud of different depth
Sample.
Embodiment 4
A kind of rarefaction sludge depthkeeping sampling method, the present embodiment are carried out by the rarefaction sludge depth sampler described in embodiment 2
Depthkeeping samples, and specifically comprises the following steps,
Step 1: the connecting rod 8 of sampler is connect with manual auger；
Step 2: being inserted into mud with 2 state directed downwardly of end seal head using manual auger driving sampler, until designated depth；
Step 3: after sampler is inserted into designated depth, pulling drawstring 5 makes the capping 3 on 1 top of probe tube overcome locking spring 4
Elastic force rotated around its hinge joint, the top end opening of probe tube 1 is opened, and the state for pulling capping 3 is maintained to make mud for a period of time
Voluntarily flow into probe tube 1；
Step 4: drag force of the release drawstring 5 to capping 3, locking spring 4 restores deformation and makes capping 3 by 1 top of probe tube
Closure of openings；
Step 5: driving sampler to detach mud using bit pressure device；Remove 1 bottom end end seal head 2 of probe tube, you can pour out and adopt
The mud sample of collection；
Step 6: the mud sample to acquisition is sealed up for safekeeping, after label, end seal head 2 is reinstalled to the bottom end of probe tube 1；
Step 7: after sampler is cleaned out, repetitive operation step 2 to step 6 adopts the mud of different depth
Sample.
It may be implemented to carry out depthkeeping to the mud at mud different depth using the method for embodiment 3 and embodiment 4
Sampling, and acquire and be not easy to be limited by environmental factors such as water velocity, mud flowings in sample, it is grabbed compared to traditional
Bucket crawl sampling, the sample of acquisition is more representative and longitudinal comparative, especially suitable thin with the big and mud to water flow
Lake, the acquisition of river etc. mud sample.
Above-mentioned specific embodiment is only explanation of the invention, is not limitation of the present invention, art technology
Personnel can as needed make the present embodiment the modification of not creative contribution after reading this specification, but as long as
It is all protected by Patent Law in scope of the presently claimed invention.
Claims (10)
1. a kind of rarefaction sludge depth sampler, including probe tube (1), it is characterised in that：The bottom end of the probe tube (1) is removable
It unloads and is provided with end seal head (2), top is hingedly provided with capping (3)；Further include being set to the inner cavity of probe tube (1) for driving envelope
Cover the elastic locking part of (3) closing probe tube (1) top end opening, and be connected to capping (3) top surface for drive cover (3) turn
The dynamic driving part opened；The top of the probe tube (1) is additionally provided with the connecting component for being connect with bit pressure equipment.
2. rarefaction sludge depth sampler according to claim 1, it is characterised in that：The end seal head (2) includes circular cone
The ontology (21) of the interconnecting piece (22) of the ontology (21) and annular shape of shape, the end seal head (2) passes through interconnecting piece (22) and sampling
The bottom end of pipe (1) is detachably fixed connection.
3. rarefaction sludge depth sampler according to claim 2, it is characterised in that：The inner periphery of the interconnecting piece (22)
Internal thread (221) is provided on side wall, be provided on the excircle side wall of the probe tube (1) for the internal thread
(221) external screw thread (11) coordinated.
4. rarefaction sludge depth sampler according to claim 1, it is characterised in that：If the elasticity locking part includes
The dry elastic force direction locking spring (4) consistent with the axis direction of probe tube (1), described locking spring (4) one end are fixedly connected
Bottom wall, the other end in capping (3) are fixedly connected on the inner circumferential side wall of probe tube (1).
5. rarefaction sludge depth sampler according to claim 1, it is characterised in that：The driving part includes that fixation is set
The drawstring (5) for being placed in the fixed ring (31) of capping (3) top surface and being fixedly connected in fixed ring (31).
6. rarefaction sludge depth sampler according to claim 5, it is characterised in that：The fixed ring (31) is set to envelope
(3) top surface is covered far from capping (3) articulated position side.
7. rarefaction sludge depth sampler according to claim 1, it is characterised in that：The connecting component includes fixed disk
(7), connecting rod (8) and several axis directions fixed link (6) consistent with sampler axis direction；Fixed link (6) edge
The circumferential equidistantly distributed of sampler, and the excircle side wall of sampler, the other end and the fixed company of fixed disk (7) are fixed in one end
It connects；The connecting rod (8) is perpendicular to the top surface of fixed disk (7), fixed setting and at the top surface geometric center of fixed disk (7).
8. rarefaction sludge depth sampler according to claim 7, it is characterised in that：The fixed link (6) is provided with altogether
Three.
9. rarefaction sludge depth sampler according to claim 1, it is characterised in that：Outside the bottom end of the probe tube (1)
Diameter is less than top outer diameter.
10. a kind of rarefaction sludge depthkeeping sampling method, it is characterised in that：It is taken using rarefaction sludge depthkeeping described in claim 1
Sample device carries out depthkeeping sampling, specifically comprises the following steps,
Step 1: sampler is fixedly connected with bit pressure device by connecting component；
Step 2: being inserted into mud with end seal head (2) state directed downwardly using bit pressure device driving sampler, until specified deep
Degree；
Step 3: driving the capping (3) on probe tube (1) top to open by driving part, and maintain a period of time so that mud
It is flowed into probe tube (1) from the top end opening of probe tube (1)；
Step 4: releasing the effect of driving part, (3) are covered under the action of elastic locking part by probe tube (1) top
Closure of openings；
Step 5: after taking out sampler using bit pressure device driving sampler rollback, probe tube (1) bottom end end seal head (2) is removed,
The mud sample of i.e. pourable acquisition；
Step 6: after sealing label up for safekeeping to the mud sample of acquisition, end seal head (2) is reinstalled into probe tube（1）Bottom end；
Step 7: after sampler is cleaned out, step 2 is repeated to step 6, the mud of different depth is sampled.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232586A (en) * | 2021-12-30 | 2022-03-25 | 中国电力工程顾问集团西北电力设计院有限公司 | Luoyang shovel drill rod connecting structure for loess exploration, Luoyang shovel device and method |
| CN114797200A (en) * | 2022-05-30 | 2022-07-29 | 中国建筑第八工程局有限公司 | Black and odorous river sediment sampling device convenient for solid-liquid separation and sampling method thereof |
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| CN114797200A (en) * | 2022-05-30 | 2022-07-29 | 中国建筑第八工程局有限公司 | Black and odorous river sediment sampling device convenient for solid-liquid separation and sampling method thereof |
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