CN102247927A - Curved bar screen surface - Google Patents
Curved bar screen surface Download PDFInfo
- Publication number
- CN102247927A CN102247927A CN2011101805358A CN201110180535A CN102247927A CN 102247927 A CN102247927 A CN 102247927A CN 2011101805358 A CN2011101805358 A CN 2011101805358A CN 201110180535 A CN201110180535 A CN 201110180535A CN 102247927 A CN102247927 A CN 102247927A
- Authority
- CN
- China
- Prior art keywords
- screen
- screen surface
- grating
- compass screen
- bars
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention belongs to the technical field of screening, jigging and washing equipment of various mines, particularly relates to a curved bar screen surface which solves the problems of low aperture ratio, poor separation effect, incomplete screening, high undersize fraction, serious screen clamping and blocking of materials and the like existing in the conventional screen surface. The curved bar screen surface comprises lower screen bars which are transversely arranged and upper screen bars which are longitudinally arranged, wherein the lower screen bars are straight; the upper screen bars are continuous, bidirectionally bent and curved; the cross sections of the upper screen bars and the lower screen bars are circular; and the length of a longitudinal straight line of screen holes formed by the lower screen bars and the upper screen bars is greater than the length of a transverse straight line of the screen holes. The curved bar screen surface has the beneficial effects that: screen penetration objects can be effectively reduced for movable screen jigging and washing operation, the oversize fraction can be effectively reduced for screening operation, and the phenomena of screen clamping and blocking of materials are basically avoided, so that the service life of the screen surface is prolonged; and the screen bars have a simple processing technology, so that the production cost is reduced, and the economic benefit is improved.
Description
Technical field
The invention belongs to the screening that is applicable to various mineral and the technical field of jigging washing appliance, be specifically related to a kind of shaped form rod compass screen surface.
Background technology
Mineral such as metal or coal all can be sneaked into various dirts in its generative process, can sneak into rock and other impurity of top board and base plate in exploitation and transportation inevitably again.In order to reduce the impurity level in the mineral, simultaneously it is divided into various products according to quality, specification, will carry out necessary washing (or claiming sorting) to it, and gravity treatment has kinds of processes methods such as jigging washing and dense media washing, wherein in the jigging washing process used jigging machine to contain most important parts be exactly compass screen surface.Mineral also need to carry out classification by the size of its granularity before use, washing or in the process of the test, promptly need to sieve, and this essential elements wherein also is a compass screen surface.Therefore, be that jigging washing or material screening all can use compass screen surface in a large number.
Compass screen surface is the working face of jigging machine and screening machine, and in the jigging washing, the sieve aperture that medium passes on the compass screen surface makes to go up current downflow, forms the pulsation MEDIA FLOW, and the mineral material is realized sorting by the density difference; In screening process, the mineral material is to carry out classification by the different sizes on the compass screen surface and the hole of shape.Compass screen surface commonly used has following several types in washing and screening operation at present:
1. perforation compass screen surface
The perforation compass screen surface is called for short sieve plate.Form with steel plate punching or boring.Sieve aperture shape commonly used is circular, also adopts square or rectangle sometimes.The percent opening of such compass screen surface is 40% ~ 63%.
The advantage of perforation compass screen surface is more firm, but percent opening is lower, is applicable to the classification (preferably 100 ~ 25mm) of 100 ~ 13mm material.
2. rod compass screen surface
The rod compass screen surface is made up of the rod iron that is arranged in parallel, and the cross section of rod iron is different shape, and the screen size on the compass screen surface is determined by the gap width between the rod.The percent opening of rod compass screen surface is generally 50%～60%.
Rod compass screen surface intensity is big, simple in structure, is used in usually on the equipment such as gravity flow screen, heavy vibratory sieve, probability screen and jigging machine, and it is applicable to+screening or the sorting (preferably more than the 50mm) of the coarse fraction material of 13mm.
3. nonmetal compass screen surface
In mould, pour into a mould and thermoplastic forms with nonmetallic materials such as rubber and polyurethane.That sieve aperture has is square, circle and gap-shaped, and preceding two kinds are used for stock grading, and the back is a kind of to be used for product dehydration, desliming and de-mediated.
The advantage of nonmetal compass screen surface be in light weight, noise is little, wear-resistant, shortcoming is that the percent opening of compass screen surface is lower, price is high.
4. braiding compass screen surface
The braiding compass screen surface is divided into two kinds of metallic sieve and netted silk cloth, is formed through braiding by strand, is used in coal preparation plant, the screening of thin material and the classification of granular material etc.
The sieve aperture of above compass screen surface structure is shaped as circle, square or rectangle, be many generally with rectangle, effect is all better in using under various occasion, but also there are some problems, mainly show as: ⑴ circle or square opening compass screen surface percent opening are lower, and its separating effect is relatively poor concerning washing, and its screening not exclusively concerning screening, its undersize fraction is bigger, causes screening precision to reduce; ⑵ material card sieve and stifled sieve phenomenon often appear in square or slot compass screen surface, influence the compass screen surface operate as normal, and the percent opening of compass screen surface is decreased, and influence separating effect; For screening operation, its screening is also incomplete, and its undersize fraction is also bigger, also causes screening precision to reduce; ⑶ the screening percentage of slot compass screen surface is more, and it is bigger to sieve granularity thoroughly, and its saturating sieve thing is increased; For screening operation, it sieved complete, and its oversize fraction is bigger, caused screening precision to reduce equally.
Because the existence of above problem can produce various result:, can cause and run coal and stay the cash phenomenon if when separating effect is relatively poor; If when screening precision reduced, its undersize fraction was bigger, the granule stage material of oversize is more, for follow-up oversize causes more saturating sieve thing in the vibro-assisted jigging washing, and the treatment process of the saturating sieve of influence thing; If when screening precision reduced, its oversize fraction was bigger, big grade material is more down for sieve, can influence the washing operation of screenings, as stopping up cyclone etc.; If use the slot compass screen surface, it is bigger to sieve thing amount and granularity thoroughly, can be bigger to saturating sieve thing treatment process influence; No matter sharpness of separation is lower, or screening precision is lower, all can cause enormous economic loss.
Summary of the invention
The present invention is in order to solve in existing vibro-assisted jigging and the screening plant, and the percent opening of used compass screen surface in sorting and screening is lower, and separating effect is relatively poor; Screening is incomplete, and its undersize fraction is bigger; Material card sieve and stifled sieve phenomenon are serious; Saturating sieve thing is more, and it is bigger to sieve granularity thoroughly; Sieved fully, all problems that phenomenon such as its oversize fraction is bigger causes provides a kind of new compass screen surface form---shaped form rod compass screen surface.
The present invention adopts following technical scheme to realize:
A kind of shaped form rod compass screen surface is characterized in that comprising the bottom grating of lateral arrangement and the top grating of vertically arranging; The bottom grating is a linear, and the top grating is continuous compound bending shaped form; The cross section of top grating and bottom grating all is circular; Vertical straight length of the sieve aperture that bottom grating and top grating form is greater than its horizontal straight length.
The top grating is sine or cosine curve.Perhaps the top grating is the tangent full curve of the identical circular arc of diameter.
The diameter of top grating is more than or equal to the diameter of bottom grating, and the diameter ratio between the two is 1～1.5.The ratio of vertical straight length of the sieve aperture that bottom grating and top grating form and horizontal straight length is 1.5 ~ 10.
The relative prior art of the present invention has following beneficial effect:
1. owing to adopted the grating of continuous compound bending, formed sieve aperture shape is under the identical situation of screening area, the equivalent screen size and the equivalent geometric diameter of shaped form compass screen surface reduce in a large number, concerning vibro-assisted jigging washing operation, can effectively reduce the sieve thing, concerning screening operation, can effectively reduce oversize fraction.
2. because the reducing or the reduction of oversize fraction of saturating sieve thing amount, material will alleviate to some extent to the friction number of times and the wearing and tearing of sieve aperture, and can effectively improve the service life of compass screen surface, or even increase substantially, so just can consider to adopt grating, thereby can alleviate the quality of compass screen surface than minor diameter.
⒊ is owing to the grating diameter reduces, if keep the sieve aperture shape and size constant, just can in identical cover surface scope, increase screen number, thereby can effectively improve the percent opening of compass screen surface, the percent opening of shaped form rod compass screen surface can reach more than 70%, and the separating effect of washing operation is effectively improved, and the undersize fraction of screening operation is effectively reduced until being 0, screening precision is guaranteed, and remarkable in economical benefits improves.
⒋ just can reduce the amount of sieve thing and the size of saturating sieve granularity owing to adopted the thin-and-long sieve aperture shape of continuous compound bending significantly for vibro-assisted jigging washing operation; For screening operation, just can limit its oversize fraction, improve screening precision.
⒌ will avoid often occurring as square or slot compass screen surface the phenomenon of material card sieve and stifled sieve substantially owing to adopted the thin-and-long sieve aperture shape of continuous compound bending.
⒍ is not owing to exist material card sieve substantially and the phenomenon of stifled sieve, so the cross section of grating can adopt circular cross-section, and this just makes the processing of shaped form grating and manufacturing process simple, can reduce production costs, and increases economic efficiency.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is the I-I sectional view of Fig. 1
Fig. 3 passes schematic diagram for slot compass screen surface bulk materials
The schematic cross-section that Fig. 4 passes for slot compass screen surface bulk materials
Fig. 5 passes schematic diagram for bulk materials of the present invention
The schematic cross-section that Fig. 6 passes for bulk materials of the present invention
Fig. 7 is the stifled schematic diagram of slot sieve aperture card
Fig. 8 is the stifled schematic diagram of sieve aperture card of the present invention
Among the figure: 1-bottom grating, 2-top grating, 3-slot compass screen surface, 4-bulk materials, 5-shaped form hole sizer face.
The specific embodiment
In conjunction with the accompanying drawings the specific embodiment of the present invention is described further, embodiment is used for illustrating of the present invention, rather than it is done any restriction.
Shaped form rod compass screen surface comprises the bottom grating 1 of lateral arrangement and the top grating of vertically arranging 2; Bottom grating 1 is a linear, and top grating 2 is continuous compound bending shaped form; The cross section of top grating 2 and bottom grating 1 all is circular, and the diameter of top grating 2 is more than or equal to the diameter of bottom grating 1, and the diameter ratio between the two is 1～1.5.Vertical straight length of the sieve aperture that bottom grating 1 and top grating 2 form is greater than its horizontal straight length, and the ratio of the two is 1.5 ~ 10.
As Fig. 1, shown in Figure 2: according to designing requirement, first blanking is processed into required shaped form with vertical grating then, as the tangent full curve of sinusoidal (or cosine) curve, the identical circular arc of diameter or the curve of other any continuous compound bending.After preparation is carried out, be welded successively, be installed at last on the corresponding work machine, on jigging machine or screening machine according to process sequence.
As previously mentioned, the shaped form compass screen surface has many advantages, and some advantages are conspicuous, and other advantages need analyzed deeply and could be familiar with in conjunction with its washing or screening process and sieve aperture shape etc.Details are as follows:
⒈ is owing to adopted the sieve aperture shape of continuous compound bending, and under the identical situation of screening area, the equivalent screen size and the equivalent geometric diameter of shaped form compass screen surface reduce in a large number.
So-called equivalent screen size and equivalent geometric diameter are meant in washing or screening process, by an actual size that works of sieve aperture material size size.Because mineral in the process that generates naturally, generally all have significantly bedding or joint, so the material shapes after its exploitation also mostly is sheet shape.If sieve aperture is a rectangle, be of a size of
, then the sheet material of its corresponding size just passes sieve aperture (as shown in Figure 3, Figure 4) easily, and this moment, the full-size in sheet material cross section was
, the length of passing the material of sieve aperture under the specific condition sometimes also can be very long (as the length among Fig. 4
L); If sieve aperture is crooked thin-and-long, because maximum rectangular being of a size of at the possible passage place of its formation
, then the size of its sheet material will reduce (shown in Fig. 5,6) significantly, and the full-size in its sheet material cross section is
, the corresponding material that it passes sieve aperture can be very not long (as the length among Fig. 6 yet
l).Mineral are in the broken material that forms of exploitation, because it generally has significantly texture, joint and certain fragility, the sectional dimension of the material piece that forms and the ratio of length generally should be between metastable scopes, so after its sectional dimension diminished, length dimension also can diminish.At the size of sieve aperture, for Fig. 3,4, its equivalent screen size is exactly a screen size
, the equivalent geometric diameter is
For Fig. 5,6, its equivalent screen size is exactly the size among Fig. 1
, the equivalent geometric diameter is
As seen, Fig. 5,6(or Fig. 1,2) the equivalent screen size and the equivalent geometric diameter all than Fig. 3,4 much smaller.
⒉ will avoid often occurring as square or slot compass screen surface the phenomenon of material card sieve and stifled sieve owing to adopted the thin-and-long sieve aperture shape of continuous compound bending.
As shown in Figure 1, 2, compass screen surface is according to equidistantly (spacing is by the on all four grating of curve shape
) arrange and to form.Because grating is a cross section that definite shape and size are arranged, the radius of curvature difference of medial and lateral each corresponding points of curve that it forms after bending machining, its easement curve part neither a radius of curvature.Like this by the left side curve of the right side graph of a grating and adjacent with it another root grating and up and down the straight line of the respective inside of two horizontal gratings constituted one approximate
The sieve seam of shape.This is approximate
The sieve seam of shape (the normal direction distances of two curves) is actually the curve seam of unequal-interval everywhere, spacing
Place's size maximum, its spacing reduces gradually then, reaches minimum to two curve turns or tangent place
This is line contact-type (seeing that Fig. 7 is blocked material figure) with the material card sieve of former rectangle sieve aperture just, changes the point-contact type (Fig. 8 is blocked material figure) of shaped form compass screen surface into.The material that several points block is easy to break away from the sieve aperture slit in vibration or under the effect of MEDIA FLOW impact (comprise and washing away), regains one's freedom; Be difficult to throw off and be stuck in two sheet materials between the straight line.Therefore, the shaped form compass screen surface can prevent that material is stuck and stops up its sieve aperture.
Claims (6)
1. a shaped form rod compass screen surface is characterized in that comprising the bottom grating (1) of lateral arrangement and the top grating of vertically arranging (2); Bottom grating (1) is a linear, and top grating (2) is continuous compound bending shaped form; The cross section of top grating (2) and bottom grating (1) all is circular; Vertical straight length of the sieve aperture that bottom grating (1) and top grating (2) form is greater than its horizontal straight length.
2. shaped form rod compass screen surface according to claim 1 is characterized in that described top grating (2) is sine or cosine curve.
3. shaped form rod compass screen surface according to claim 1 is characterized in that described top grating (2) is the tangent full curve of the identical circular arc of diameter.
4. according to claim 1 or 2 or 3 described shaped form rod compass screen surfaces, it is characterized in that the diameter of the diameter of top grating (2) more than or equal to bottom grating (1), the diameter ratio between the two is 1～1.5.
5. according to claim 1 or 2 or 3 described shaped form rod compass screen surfaces, it is characterized in that the vertical straight length of the sieve aperture that described bottom grating (1) and top grating (2) form and the ratio of horizontal straight length are 1.5 ~ 10.
6. shaped form rod compass screen surface according to claim 4 is characterized in that the vertical straight length of the sieve aperture that described bottom grating (1) and top grating (2) form and the ratio of horizontal straight length are 1.5 ~ 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101805358A CN102247927A (en) | 2011-06-30 | 2011-06-30 | Curved bar screen surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101805358A CN102247927A (en) | 2011-06-30 | 2011-06-30 | Curved bar screen surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102247927A true CN102247927A (en) | 2011-11-23 |
Family
ID=44975706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101805358A Pending CN102247927A (en) | 2011-06-30 | 2011-06-30 | Curved bar screen surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102247927A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759317A (en) * | 2019-02-15 | 2019-05-17 | 河南科技大学 | A kind of seed screening plant |
| CN112246625A (en) * | 2020-11-17 | 2021-01-22 | 安徽方园毅智筛分科技有限责任公司 | Wave polyurethane high frequency straight line vibration screen cloth |
| CN113795322A (en) * | 2019-07-19 | 2021-12-14 | 三菱重工环境·化学工程株式会社 | Screen device and processing system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6284145B1 (en) * | 1997-04-21 | 2001-09-04 | Gl&V/Celleco Ab | Screen plate for screening of a pulp suspension and method to separate the same |
| CN201271603Y (en) * | 2008-09-28 | 2009-07-15 | 山西大同大学 | Circular arc wave-shaped sieve plate of moving sieve jig |
| CN201735448U (en) * | 2010-08-03 | 2011-02-09 | 山西大同大学 | Slantedbar twist-shaped sieve plate of movable sieve jig |
-
2011
- 2011-06-30 CN CN2011101805358A patent/CN102247927A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6284145B1 (en) * | 1997-04-21 | 2001-09-04 | Gl&V/Celleco Ab | Screen plate for screening of a pulp suspension and method to separate the same |
| CN201271603Y (en) * | 2008-09-28 | 2009-07-15 | 山西大同大学 | Circular arc wave-shaped sieve plate of moving sieve jig |
| CN201735448U (en) * | 2010-08-03 | 2011-02-09 | 山西大同大学 | Slantedbar twist-shaped sieve plate of movable sieve jig |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759317A (en) * | 2019-02-15 | 2019-05-17 | 河南科技大学 | A kind of seed screening plant |
| CN113795322A (en) * | 2019-07-19 | 2021-12-14 | 三菱重工环境·化学工程株式会社 | Screen device and processing system |
| CN113795322B (en) * | 2019-07-19 | 2022-12-06 | 三菱重工环境·化学工程株式会社 | Screen device and processing system |
| CN112246625A (en) * | 2020-11-17 | 2021-01-22 | 安徽方园毅智筛分科技有限责任公司 | Wave polyurethane high frequency straight line vibration screen cloth |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102247927A (en) | Curved bar screen surface | |
| CN204675345U (en) | A kind of reverse distributing device of all amounts for two sieving machine pan feedings | |
| KR20140142042A (en) | Plate type screen mesh | |
| CN201183048Y (en) | Mining screen sheet | |
| CN205361950U (en) | Stifled sieve is prevented to hierarchical shale shaker | |
| US20180369868A1 (en) | Screen | |
| AU2018303343B2 (en) | A screen | |
| CN208098350U (en) | A kind of improved magnetic separator mine-feeding equipment | |
| CN101104171A (en) | Bi-directional arc sieve | |
| CN104785440A (en) | Flip-flow screen mesh with grooves | |
| CN202570613U (en) | Screen plate | |
| CN203316389U (en) | Classifying screen and screen plate thereof | |
| CN203875008U (en) | Inlet grid sieve of crusher | |
| CN206104107U (en) | Eliminate medium box structure in clearance between magnet separator medium box | |
| CN201031515Y (en) | Wind-proof grid wall | |
| CN213558399U (en) | Mining machinery convenient to maintenance | |
| CN202621449U (en) | Steel strip-type sieve plate | |
| CN201211514Y (en) | Wet-type fine grain grade screen sheet | |
| CN201357140Y (en) | Coal mine coal preparation double-deck vibration grading sieve | |
| CN205496067U (en) | Slot hole sieve | |
| CN202570614U (en) | Arc-shaped screen mesh | |
| CN2715867Y (en) | Mica concentrating machine | |
| CN204429676U (en) | A kind of powder vibratory sieve | |
| CN204244763U (en) | A kind of sorting screen and sieve thereof being applicable to grain header | |
| CN203899932U (en) | Distributing device for electromagnetic vibrating screen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111123 |
|
| RJ01 | Rejection of invention patent application after publication |