33results about How to "Increase sampling depth" patented technology

The invention discloses a grain quantitative sampler which comprises a body. A negative-pressure device, a sampling chamber, a splitting device and a sampling mechanism are arranged on the body. The negative-pressure device is connected to the sampling chamber and used for generating negative pressure in the sampling chamber, the wall surface of the sampling chamber is provided with a sampling port connected with a sampling tube, the bottom of the sampling chamber is provided with a discharging port, and a sampling switch mechanism is arranged at the discharging port which is connected to thesplitting device. An outlet of the splitting device is connected to the sampling mechanism, and the sampling mechanism comprises a sampling hopper for sample receiving and a weighing device for bearing the sampling hopper. The grain quantitative sampler has advantages that sampling is performed by vacuum suction, sampled samples are proportionally split through the splitting device and weighed inreal time through the weighing device, sampling quality of each layer of grains can be accurately controlled, and sample representativeness is guaranteed.

The invention discloses an anti-sloughing hole reverse circulation sampling bit comprising a bit body with an inner cavity and a hollow annular ejector arranged in the bit body. One end of the bit body is provided with inner, middle and outer cutter heads from interior to exterior, a sampling port is arranged on the inner cutter head, a clearance groove used for slagging is arranged between the middle and outer cutter heads, an annular ejector is fixedly arranged in the cavity of the bit body and forms an annular cavity with the inner wall of the bit body, and the sampling port is communicated with the hollow annular ejector; the bit body is provided with an ejecting hole correspondingly, and the ejecting hole is communicated with the annular inner cavity. The bit is easy to operate and is capable of sampling from soft and outburst seams rapidly and accurately, the sampling time is saved, the sampling depth is increased, the mine sampling efficiency and safety are improved, and the rate of gas accidents is decreased.

The invention relates to the technical field of soil detectors, and discloses a soil detector for detecting soil acidity and alkalinity properties, the soil detector comprises a first mounting plate, a second mounting plate and a third mounting plate, and the first mounting plate, the second mounting plate and the third mounting plate are sequentially arranged from bottom to top. The soil sampling mechanism is improved, a guide sleeve is arranged, when sampled soil is conveyed to a lifting sleeve, due to the fact that the bottom end of the guide sleeve is subjected to closing-up treatment, blocky soil is ground at the closed-up position in the conveying process, the ground soil is granular, the granular soil is conveyed by a spiral conveying guide strip, and the soil sampling efficiency is improved. The soil entering the lifting sleeve can be ground again, so that the soil is in a sand grain state, and the device has the advantages that after the sampled soil is ground, in the detection process, the pH value in the soil can be more conveniently released, the pH value releasing and diluting speed is increased, the detection efficiency is improved, and more time is saved.

The invention relates to a submarine sampling device and aims at providing a bolt-free gravity piston type long cylindrical sediment fidelity sampler. The sampler comprises a fidelity sampling barrel, a stream guidance cabin, an accumulator, a hermetic cabin, a movement weight mechanism, a hanging bracket, and the like. The stream guidance cabin is sleeved with the upper end of a fidelity barrelbody; and the hermetic cabin is movably sleeved with the fidelity barrel body and separated from the stream guidance cabin. The hanging bracket comprises plywood, a piston, a main cable and a hermetic cabin cable, wherein the main cable penetrates through the plywood and connects with the piston positioned in a bushing; and the hermetic cabin cable penetrates through the plywood and connects withthe upper end of the hermetic cabin. The bolt-free gravity piston type long cylindrical sediment fidelity sampler based on sampling caliber optimization increases the sampling depth. The sampler scheme of a bolt-free mechanism avoids sample pressure maintaining failure caused by the miswork of a bolt. Based on a water flushing technology on the wall of a cofferdam, the sampler enhances the sealing property of the lower seal of the lower hermetic cabin.

The invention discloses a D-PMU device-based power distribution network fault accurate positioning method. The method comprises the steps of 1) establishing a fault diagnosis model according to a D-PMU configuration condition of a power distribution network; acquiring and uploading measurement data based on real-time communication of the D-PMU; 2) arranging measurement data before and after a fault occurs; judging whether T-connection lines exist at the two ends of the fault position or not, if yes, executing the step 3), and if not, executing the step 4); 3) identifying a faulty line and a non-faulty line, and combining the measurement information of the non-faulty line; 4) solving the power distribution network fault diagnosis model by using the measurement data before and after the fault, and 5) performing calculating and sorting to complete fault positioning. According to the power distribution network fault diagnosis method, the position of the fault is obtained, the accurate position of the fault of the power distribution network is determined, and the requirements in practical application are met.

The invention provides an on-site sampling device for slurry in a goaf filling process and a use method thereof, belonging to the technical field of mine filling sampling. The device includes an outer sleeve, an inner sleeve, a cover plate and an L-shaped steel plate bracket. The outer sleeve is provided with an outer sleeve guide rail, and the inner sleeve is provided with an inner sleeve slide rail and a chute. Accurate, the inner casing can be inserted into the outer casing, the cover plate can be inserted into the chute, and the outer casing is fixed by a pair of L-shaped steel plate brackets and bottom plate fixing expansion bolts. The device adopts a separate casing structure, which can be assembled flexibly according to the sampling requirements. The structure is simple and the installation is quick. The inner casing can be reused to reduce costs, and the outer casing is retained in the filling body, which can be used as a reinforcement structure to improve the overall strength of the filling body. The sampling depth is large, typical and representative, and the sampling success rate is high. According to production needs, filling slurry can be taken out in situ, and filling bodies of different ages can also be taken out to meet different production inspection and test needs.

The invention relates to a monitoring and early-warning platform based on a biogas system energy utilizing efficiency method. The monitoring and early-warning platform comprises a body, a biogas slurry detecting unit, a biogas slurry storing unit, a biogas slurry collecting unit, a lifting unit and a warning unit, wherein the biogas slurry storing unit moves up and down relatively to the body; a water inlet valve and a water outlet valve of the biogas slurry storing unit are respectively arranged on a water inlet and a water outlet; a cushioning cavity is arranged at the water inlet valve; an impeller unit is arranged in the cushioning cavity and comprises a variable-pitch helical impeller assembly, a positioning bearing and a rotating shaft; for the blade shape of the nth (n is larger than or equal to 1 and less than or equal to N) variable-pitch helical impeller of the variable-pitch helical impeller assembly, the equations of a locus from one end near the water inlet valve to the other end of the variable-pitch helical impeller are Xi=r*cos (thetai+2PI*n / N), Yi=r*sin (thetai+2PI*n / N), Zi=(n-1)*(L+a) / N+(thetai / 2PI) m*(L-(N-1)a) / N; the biogas slurry collecting unit is used for conveying the biogas slurry in the cushioning cavity; and the lifting unit is used for enabling the biogas slurry storing unit to move up and down.

The invention discloses a lacustrine core sampling device for sediments in lakes with different depths. The lacustrine core sampling device comprises a handle rod, a drilling rod and a rotary core capturing device which are sequentially fixedly connected from top to bottom, wherein the rotary core capturing device comprises a sample pipe and a rotary blade, a sample pipe body is a semicircular groove body, a connecting rod connected with the drilling rod is arranged at the top end of the semicircular groove body, a drill bit is fixedly arranged on the outer side surface of the bottom end of the semicircular groove body, and two ends of the rotary blade are respectively rotatably connected to the top end and the bottom end of the semicircular groove body. According to the lacustrine core sampling device, the defect of an existing mechanical sediment sampler is overcome, the sampling success rate and the sample integrity are increased, lacustrine cores of water bodies and marshes in different depths are sampled through the arrangement of prolongable drilling rod and a hammer, the dismantling link is greatly simplified, the time is effectively saved, and the demand on research is also met.

The invention discloses an ice-breaking seawater sampling device for sub-ice water environment monitoring, and relates to the technical field of marine monitoring. The ice-breaking seawater sampling device for sub-ice water environment monitoring includes a slide plate on which a rotating mechanism, an ice-breaking mechanism, a rewinding mechanism and a sampling mechanism are arranged. The first opening of the first opening is provided with a lower pressing rod, and the bottom end of the pressing rod extends to the bottom of the slide plate and is provided with a suction cup. The ice-breaking seawater sampling device for sub-ice water environment monitoring can not only increase the efficiency of seawater sampling through the cooperation of the second installation frame, the fixed plate, the third motor, the third rotating shaft, the rope winding frame and the traction rope. depth, while also increasing the sampling range of the device and reducing the time for seawater sampling.