CN220590752U - Wet screening instrument for experiments - Google Patents
Wet screening instrument for experiments Download PDFInfo
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- CN220590752U CN220590752U CN202320958681.7U CN202320958681U CN220590752U CN 220590752 U CN220590752 U CN 220590752U CN 202320958681 U CN202320958681 U CN 202320958681U CN 220590752 U CN220590752 U CN 220590752U
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- Prior art keywords
- screen
- flushing
- water distribution
- experimental
- pipe
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- 238000012216 screening Methods 0.000 title claims abstract description 20
- 238000002474 experimental method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000011010 flushing procedure Methods 0.000 claims abstract description 41
- 238000009826 distribution Methods 0.000 claims abstract description 35
- 238000005406 washing Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000002699 waste material Substances 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000004140 cleaning Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 8
- 239000004744 fabric Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- -1 mining Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a wet screening instrument for experiments, which comprises a base, a top cover, a plurality of screens and a drainage assembly, wherein the screens are sequentially stacked from bottom to top according to the order of the meshes from large to small; the washing assembly is provided with a plurality of water outlets corresponding to each layer of screen. The flushing assembly comprises a plurality of flushing water distribution parts, the flushing water distribution parts and the screen mesh are arranged in a spaced combination mode, and the outer side of the flushing water distribution parts is communicated with the water inlet pipe. According to the utility model, through the flushing assembly, flushing water can be controlled to be distributed on each layer of screen, so that the flushing efficiency of each screen is ensured, the experimental efficiency is improved, and the experimental precision is ensured; meanwhile, the structure is simple and portable, the test sieve can be assembled with test sieves of various specifications in a modularized manner, and the practicability is high; high hydraulic efficiency, low cleaning water consumption and less experimental waste liquid.
Description
Technical Field
The utility model relates to experimental equipment, in particular to a wet screening instrument for experiments.
Background
The particle size distribution is an important index showing the fineness and classification of the particles, and for the particle size distribution detection of the fine materials, wet screening is most commonly used and more accurate, and the wet screening detection range of the fine materials is generally between 20 mu m and 2mm according to the detection standard. The wet screening instrument is an experimental instrument for detecting the particle size distribution of the particulate matters by an over-wet method, can screen and detect various organic and inorganic matter particles, and is widely applied to the fields of soil, sand, mining, medicine, food, agriculture and the like. The general procedure for wet screening experiments was: stacking the required sleeve sieve and the wastewater collection chassis on a base of the sieving instrument from thin to thick in sequence, weighing a certain amount of samples, pouring the samples into a screen at the top, or preparing the weighed samples into suspension and pouring the suspension into the sieving instrument from the top; screening experiments were then performed by adding flush water from the top of the test screen.
In the prior art, a wet screening instrument usually adopts a mode of manually adding water from the top to carry out flushing screening, or a single hole is formed in a top cover to automatically introduce flushing water to carry out flushing. The hydraulic efficiency of the two modes is mainly concentrated on the topmost screen, and when the number of the screens used in the experiment is more than 3, the flushing water has almost no hydraulic flushing effect on the particulate matters on the surface of the screen at the bottom; the bottom screen mesh is often small in aperture, and the screen mesh is easy to block, so that flushing water cannot permeate the bottom screen mesh or overflow from the top, and experiments cannot be carried out for a long time. In addition, in the experimental process, the screen mesh moves along with the driving device in a three-dimensional way, materials on the screen mesh tend to be clustered together and irregularly move on the screen mesh, and are not uniformly distributed in the middle of the screen mesh all the time, and the two ways can not effectively wash the detection materials; for some fine materials with high viscosity, the hydraulic flushing efficiency is poor, so that the agglomerated particles cannot be flushed away, and larger experimental errors are easily caused.
To the above-mentioned problem, prior art generally adopts the layering to wash, washes 1-2 layers of screens on upper portion earlier, takes out it again, continues to wash the bottom screen cloth one by one, but this often leads to the flushing fluid to spill experimental error big, and experimental efficiency is lower.
Disclosure of Invention
The utility model aims to: the utility model aims to provide an experimental wet screening instrument which can uniformly wash each layer of screen cloth and improve experimental efficiency and precision.
The technical scheme is as follows: the utility model relates to a wet screening instrument for experiments, which comprises a base, a top cover, a plurality of screens and a drainage assembly, wherein the screens are sequentially stacked from bottom to top according to the order of meshes from large to small; the washing assembly is provided with a plurality of water outlet ends corresponding to the screens of each layer, and comprises a plurality of washing water distribution parts, wherein the washing water distribution parts are combined with the screens at intervals, and the outer sides of the washing water distribution parts are communicated with a water inlet pipe.
Preferably, the flushing water distribution part comprises a shell and a distribution pipe, wherein the distribution pipe is fixedly arranged on the inner side of the shell and communicated with the water inlet pipe, the flushing water distribution part is circular, and a plurality of nozzles are arranged on the inner side of the flushing water distribution part.
Preferably, the included angle between the water outlet direction of the nozzle and the plane of the screen is 30-90 degrees.
Preferably, the drainage assembly comprises a chassis for waste liquid collection and a drainage pipe, and a control valve and a vacuum pump are arranged on the drainage pipe.
Preferably, the ratio of the height of the housing to the height of the screen is H/h=0.15-0.4.
Preferably, the ratio of the inner diameter of the distribution pipe to the inner diameter of the screen is D1/d2=0.5-0.8.
Preferably, the top of the shell of the screen and the flushing water distribution part is provided with grooves, the bottom of the shell is provided with protrusions, the outer sides of the grooves and the protrusions are provided with sealing rings, and the screen and the flushing water distribution part are assembled and arranged at intervals through the grooves and the protrusions.
The beneficial effects are that: compared with the prior art, the utility model has the following advantages: according to the utility model, through the flushing assembly, flushing water can be controlled to be distributed on each layer of screen, so that the flushing efficiency of each screen is ensured, the experimental efficiency is improved, and the experimental precision is ensured; meanwhile, the structure is simple and portable, the test sieve can be assembled with test sieves of various specifications in a modularized manner, and the practicability is high; high hydraulic efficiency, low cleaning water consumption and less experimental waste liquid.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of a screen and flush water dispenser assembly;
FIG. 3 is a schematic view of the structure of a flush water dispenser;
FIG. 4 is a schematic illustration of the height of a screen and rinse water dispenser in comparison to sizing;
fig. 5 is a schematic illustration of a flush water dispenser with sizing.
Detailed Description
The technical scheme of the utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1, a wet screening apparatus for experiments comprises a base 1, a top cover 2 and a plurality of screens 3. A plurality of guide rods 6 are vertically arranged above the base 1 and are uniformly arranged; the screen 3 is sequentially stacked on the inner side of the guide rod 6 from bottom to top according to the order of the meshes, and the guide rod 6 is arranged on the periphery of the screen 3 in a surrounding manner to limit the movement of the screen 3 in the horizontal direction. The top cap 2 sets up the screen cloth 3 top at the top layer, and guide arm 6 top is equipped with fixed knot constructs 7, after placing screen cloth 3 and top cap 2, and fixed knot constructs 7 and is used for fastening restriction top cap 2 reciprocates. The inside driving motor, spring and the shock buffering structure that are equipped with of base 1 provides vibration or rotation driving force for this device.
As shown in fig. 2-4, in order to improve the experimental efficiency, the device is further provided with a flushing assembly, which comprises a plurality of flushing water distribution members 40 and a water inlet pipe 44, wherein the flushing water distribution members 40 are arranged above each layer of screen 3 and are arranged at intervals with the screen 3, and are assembled in a combined manner as shown in fig. 2. Specifically, as shown in fig. 3, the flush water dispenser 40 includes a housing 41, a dispensing tube 42, and a nozzle 43; the shell 41 all is equipped with the recess with screen cloth 3 top, and the bottom is equipped with the arch, and recess and protruding outside all are equipped with the sealing washer, and the shell 41 assembles through recess and arch with screen cloth 3, and the ratio h of the height of shell 41 and the height of screen cloth 3: h=0.3; the distributing pipe 42 is annular and fixedly installed inside the casing 41, and the ratio D1 of the inner diameter of the distributing pipe to the inner diameter of the screen 3 is as follows: d2 =0.8, the distribution pipe 42 has a plurality of nozzles 43 uniformly arranged on the inner periphery thereof; the nozzle 43 sprays washing water to the screen 3, and the water outlet direction thereof forms an angle of 60 DEG with the plane of the screen 3; the water inlet pipe 44 is provided with a plurality of branches, each branch is communicated with the distributing pipe 42 of the flushing water distributing part 40, and each branch is provided with a valve 45, so that the flushing water distribution can be adjusted according to experimental conditions; the water inlet pipe 44 and the flushing water distribution part 40 are movably connected, so that the disassembly and the assembly are convenient.
The device is also provided with a drainage assembly comprising a chassis 51 for waste liquid collection and a drain 52 for collecting and draining the waste water after flushing the screen 3. The chassis 51 is arranged between the screen 3 and the base 1 at the bottom layer, is provided with a water outlet, is connected with a water outlet pipe 52, and is provided with a control valve 53 and a vacuum pump 54 on the water outlet pipe 52.
The top cover 1, the screen 3, the flushing water distribution member 40 and the chassis 51 of the device are sequentially arranged on the base 1, and sealing assembly and fixation are realized between adjacent structures through the matching structures of grooves, bulges and sealing rings.
The device is particularly used:
placing the chassis 51 on the base 1; selecting the required screen mesh number, stacking the screen mesh numbers sequentially from the bottom in the order of the mesh number from large to small (namely, the screen pore diameter is from small to large), and stacking the screen 3 and the flushing water distribution part 40 at intervals in a combined mode; covering the sealing top cover 2, pressing the screen 3, and fixing the screen by the fixing structure 7; checking whether the drain pipe 52 and the water inlet pipe 44 are unobstructed, opening the driving device to start an experiment after the checking is finished, controlling the flushing pressure of the flushing assembly to be 0-3bar, controlling the flushing pressure to be too low, and controlling the flushing strength to be insufficient, wherein too high flushing pressure can cause too high speed of particles passing through the screen, so that larger-size particles are easily blocked on the screen holes along with high-strength water power, and the screen is blocked; in addition, the too high water pressure causes the too fast fluid flow rate on the screen, the drainage speed of the bottom screen is far less than the inflow flow rate, the overflow is easy to cause, and the experiment cannot be normally carried out; secondly, too high water pressure can damage the screen, affecting the service life of the machine.
After each round of screening is finished, the vacuum pump 54 is started, so that the screen 3 can be rapidly drained under the condition of slight negative pressure, and the situation that the flushing water of the screen 3 at the bottom is not drained when the screen 3 is opened and the experiment fails due to material overflow is avoided. In addition, the vacuum pump 54 is utilized to drain, so that quick material draining can be realized, the sample drying time is shortened, and the experimental efficiency and accuracy are improved.
Claims (7)
1. The wet screening instrument for the experiment comprises a base (1), a top cover (2), a plurality of screens (3) and a drainage assembly, wherein the screens (3) are sequentially stacked from bottom to top according to the order of the meshes from large to small; the washing machine is characterized by further comprising a washing component, wherein a plurality of water outlet washing ends are arranged on the washing component corresponding to each layer of screen (3), the washing component comprises a plurality of washing water distribution parts (40), the washing water distribution parts (40) and the screen (3) are combined at intervals, and the outer sides of the washing water distribution parts are communicated with a water inlet pipe (44).
2. The experimental wet screening apparatus according to claim 1, wherein the flushing water distribution member (40) comprises a housing (41) and a distribution pipe (42), the distribution pipe (42) is fixedly arranged at the inner side of the housing (41), a water inlet pipe (44) is communicated, the shape of the distribution pipe is circular, and a plurality of nozzles (43) are arranged at the inner peripheral side of the distribution pipe.
3. The experimental wet screening apparatus according to claim 2, wherein the outlet direction of the nozzle (43) is at an angle of 30 ° -90 ° to the plane of the screen (3).
4. The experimental wet screening apparatus according to claim 1, wherein the drainage assembly comprises a chassis (51) for waste liquid collection and a drainage pipe (52), and a control valve (53) and a vacuum pump (54) are arranged on the drainage pipe (52).
5. Wet bench for experiments according to claim 2, characterized in that the ratio of the height of the housing (41) to the height of the screen (3) is H/H = 0.15-0.4.
6. Wet bench for experiments according to claim 2, characterized in that the ratio of the inner diameter of the distribution pipe (42) to the inner diameter of the screen (3) is D1/d2 = 0.5-0.8.
7. The experimental wet screening apparatus according to claim 2, wherein the top of the screen (3) and the housing (41) of the flushing water distribution member are provided with grooves, the bottom is provided with protrusions, the outer sides of the grooves and the protrusions are provided with sealing rings, and the screen (3) and the flushing water distribution member (40) are assembled and arranged at intervals through the grooves and the protrusions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320958681.7U CN220590752U (en) | 2023-04-25 | 2023-04-25 | Wet screening instrument for experiments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320958681.7U CN220590752U (en) | 2023-04-25 | 2023-04-25 | Wet screening instrument for experiments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220590752U true CN220590752U (en) | 2024-03-15 |
Family
ID=90164543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320958681.7U Active CN220590752U (en) | 2023-04-25 | 2023-04-25 | Wet screening instrument for experiments |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220590752U (en) |
-
2023
- 2023-04-25 CN CN202320958681.7U patent/CN220590752U/en active Active
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