CN206594020U - A kind of negative pressure pulp classifier and testing sieve - Google Patents
A kind of negative pressure pulp classifier and testing sieve Download PDFInfo
- Publication number
- CN206594020U CN206594020U CN201720349510.9U CN201720349510U CN206594020U CN 206594020 U CN206594020 U CN 206594020U CN 201720349510 U CN201720349510 U CN 201720349510U CN 206594020 U CN206594020 U CN 206594020U
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- sieve
- negative pressure
- wall
- testing sieve
- pulp classifier
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Abstract
The utility model discloses a kind of negative pressure pulp classifier testing sieve, including sieve wall, the lid being detachably connected with the sealing of sieve wall upper surface, and for filtering the screen cloth of cement, the screen cloth outward flange is fixedly connected with edge bar, the edge bar section is L-shaped to be set, and horizontal edge lengths are less than vertical edge lengths, vertical edge madial wall has the internal thread matched with the external screw thread set on the sieve wall outer wall, the sieve wall is provided with sealing ring with being additionally provided with edge bar opposite face in circular groove, the circular groove.The utility model with sieve wall by the screen cloth of testing sieve by being arranged to the structure that is detachably tightly connected, and solve needs to change whole testing sieve after becoming big influence screening precision due to mesh size in the prior art, causes the problem of unnecessary consumptive material is wasted.
Description
Technical field
The utility model is related to cement testing equipment field, more particularly to cement granularity detection pulp classifier and its experiment
Sieve, is a kind of negative pressure pulp classifier and testing sieve specifically.
Background technology
Negative pressure screen analyzer have analyze speed it is fast, it is easy to operate the features such as.The popular configuration of current negative pressure screen analyzer it is many with
Vertical type high-power dust catcher as the instrument negative pressure source, and using small cyclones cylinder be used as pre-dedusting device.
Used in the several years among process, it has been found that had a disadvantage that with the negative pressure source that dust catcher makees negative pressure screen analyzer:1）
Existing testing sieve uses integrative-structure, and after repeatedly sieve, the aperture of the screen cloth of testing sieve can be significantly increased, thus
The screening of cement, which can be caused, accurately to be carried out, and big particle diameter cement can be caused to destroy the true of cement-particle size by screen cloth
Property.2) when sieving, screenings enters cyclone cylinder together with large quantity of air, and the dust laden air do not collected by cyclone cylinder enters dust catcher.
Still containing part particle diameter than aperture of filter screen also small ultrafine dust in the air discharged after by dust catcher strainer filtering.In powder
Dust of the dust than big particle diameter of this ultra-fine grain diameter is more harmful to human body in dustiness dye.Negative pressure sieve is typically all positioned over interior
Use, directly by the discharge of useless wind indoors, the analysis room higher to purity requirements and operator cause two to dust catcher in itself
Secondary pollution.3) negative pressure sieve is general uses 0.080mm screen clothes, and screenings particle is smaller, it is easy to block dust catcher screen pack.It is logical
Several classes that often have more than is needed will be cleared up dust catcher filter screen, to meet the requirement that negative pressure sieves negative pressure.Dust-collecting bag for dust collector and
The collected ash of cyclone cylinder next part ash bottle storage is all water content very low powder.Easily flown upward in scale removal process, to equipment
And personnel have larger pollution, so that someone feels convenient not as good as water sieve cleaning using negative pressure sieve analysis.4) with making
With the increase of number of times, dust is constantly accumulated on dust catcher screen pack, and the negative pressure for causing negative pressure to sieve declines successively.Instrument specification will
Ask negative pressure value control between 4000~6000Pa this scope, differ 2000Pa.This design of negative pressure source is made using dust catcher
Inherently determining the use condition of negative pressure sieve, to certainly exist negative pressure unstable.Apparent negative pressure value is different, and same sample is to same
The passability of one screen cloth is also different, and in other words the analysis result of namely negative pressure sieve is also different.In addition in actual production also
The situation of cleaning not in time can occur because of some reasons, negative pressure is significantly less than required control range, this is that a kind of configuration lacks
Fall into.
Utility model content
The purpose of this utility model is to provide a kind of negative pressure pulp classifier, existing for solve to mention in background technology
The dust emission that particle diameter in cement is minimum that negative pressure pulp classifier is present influences the air matter of experiment work environment into air
The problem of measuring, and then damaged to body；On the other hand, the utility model also provides a kind of testing sieve, existing for solving
Testing sieve after test of many times due to mesh size increase after need to replace whole testing sieve, increase consumptive material into
This, screen cloth is detachably connected by the testing sieve in the utility model with sieve wall, only need to change screen cloth, cost is substantially reduced, and is sieved
Wall and lid can repeatability be used for multiple times, save consumables cost.
The utility model is achieved through the following technical solutions：
A kind of negative pressure pulp classifier testing sieve, including sieve wall, the lid being detachably connected with the sealing of sieve wall upper surface, and
Screen cloth for filtering cement, the screen cloth outward flange is fixedly connected with edge bar, and the edge bar section is L-shaped to be set, and
Horizontal edge lengths are less than vertical edge lengths, vertical edge madial wall have with the external screw thread that sets is matched on the sieve wall outer wall
Screw thread, the sieve wall is provided with sealing ring with being additionally provided with edge bar opposite face in circular groove, the circular groove.
Preferably, the lid protrudes formation close to outer edge and is embedded in the sieve wall and with sieving in wall straight down
It is provided with the spherical handle for being easy to taking and placing, the lid and also fixes in the middle part of the boss that side is tightly connected, the cover top surface
It is connected with the depressimeter for sieving air pressure inside value for viewing test with being connected inside testing sieve.
Preferably, the depressimeter includes piston cavity, is slided in the piston cavity and with piston cavity inwall
The rubber piston of dynamic connection, the rubber piston is by rubber band line with being connected at the top of piston cavity and at the top of piston cavity
The air inlet with being connected inside piston cavity is provided with the wall of side.
The utility model also provides a kind of negative pressure pulp classifier with above-mentioned testing sieve, specifically includes what is be tightly connected successively
Dust jar, the first valve, gas tank, filter, the second valve, vacuum suction machine, the exhaust end of the vacuum suction machine by with
The exhaust outlet of pulp classifier housing connection is in communication with the outside.
Operation principle and using method：When carrying out cement screening using the utility model, the first valve is first shut off, is beaten
The second valve is opened, vacuum suction machine is opened, in the presence of vacuum suction machine, the air being stored in gas tank is gradually extracted
Go, the vacuum in gas tank gradually increases, when hear the running sound of vacuum suction machine from it is clear and melodious become it is substantially overcast after closing
Second valve, then turns off vacuum suction machine.Vacuum state or nearly vacuum state are now in gas tank, its pressure value is much
Less than normal atmosphere (An) value, it would be desirable to which the cement sample of screening is put into testing sieve, covers tightly lid, slowly the first valve is opened
Gas tank is connected with the testing sieve and dust jar, due to there is draught head, be stored in air in testing sieve and dust jar by
Step is flowed in gas tank.What deserves to be explained is, the flow velocity of air is relevant with the opening and closing degree of the first valve, opens bigger, air stream
Speed is bigger, and the negative pressure value of moment is bigger, conversely, the opening degree of the first valve is smaller, air velocity is smaller, the negative pressure of moment
Value is bigger, but with the flowing of air, air pressure can reach balance in a short time and same, then on the screen cloth of testing sieve
There is pressure difference in portion and bottom, and then cement is carried out the cement granules that granularity is less than mesh size in the presence of pressure difference
Screening.Because the sieve wall of lid and testing sieve is tightly connected, therefore, it is internally formed and connects completely with gas tank inside testing sieve
After logical, even if air pressure inside is significantly lower than atmospheric pressure, cement can not pass through screen cloth in the presence of pressure difference；Therefore, now
Depressimeter just serve regulation pressure difference effect.Concrete principle is：Due in the piston cavity and testing sieve of depressimeter
Portion's cavity connection, therefore, when air pressure inside is strongly reduced, the air pressure that the stopple cavity is located at piston lower portion also subtracts therewith
It is small, by the scale that is arranged on the piston cavity it is observed that the changing condition of negative pressure value, with the continuous of this negative pressure value
Increase, piston is moved downward in the presence of atmospheric pressure along piston cavity, and air constantly enters piston by air inlet
Cavity is located at the top of piston, and rubber band line is constantly elongated with moving down for piston, when piston is located at piston cavity and experiment
When sieving cavity junction, airtight effect is lost, the pressure that air is entered inside testing sieve, increase testing sieve forms pressure again
Strong poor, cement carries out negative pressure screening.Due to the pressure increase in testing sieve, piston gradually rises in the presence of rubber band line, no
It is disconnected to repeat said process, until sieve test is completed.
What deserves to be explained is：When the negative pressure value of gas tank is not enough, the second valve can be still opened during sieve test
Door, opens the negative pressure value that the increase experiment of vacuum drawn machine needs.But it should not be tested in this manner for a long time, no person's filtering
The load of device can increase, as the cement dust of air circulation can block the filter core of filter interior during experiment, contracting
The service life of short filter core.
Preferably, the gas tank is also associated with vacuum table.The purposes of vacuum table is set to be that vacuum drawn can be being carried out
With the negative pressure condition in negative pressure screening process in complete monitoring gas tank, to be adjusted, it is ensured that optimal negative pressure value is tested.
The utility model compared with prior art, with advantages below and beneficial effect：
（1）The utility model is solved by the way that the screen cloth of testing sieve is arranged into the structure that is detachably tightly connected with sieve wall
Need to change whole testing sieve after becoming big influence screening precision due to mesh size in the prior art, cause unnecessary consumptive material
The problem of waste.
（2）The utility model by conventional vacuum cleaner by being substituted for gas tank, by the use of gas tank as negative pressure source, solves existing
There is small particle dust in technology to pollute air in air as air circulation is entered, the problem of being detrimental to health.
（3）The utility model can show the pressure in testing sieve constantly by setting depressimeter on testing sieve lid
Change, grasps the negative pressure pressure difference in process of the test, convenient control and time and the suction strength for grasping experiment, improves experiment effect
Rate.
Brief description of the drawings
Fig. 1 is the sectional structure chart of testing sieve；
Fig. 2 is Fig. 1 Standard figure；
Fig. 3 is the top view of testing sieve；
Fig. 4 is the structural representation of negative pressure pulp classifier；
Fig. 5 is the structure enlarged diagram of vacuum table；
Wherein 1- testing sieves；2- dust jars；3- housings；The valves of 4- second；5- vacuum suction machines；6- exhaust outlets；7- negative pressure
Table；8- gas tanks；The valves of 9- first；10- filters；11- lids；111- handles；112- depressimeters；113- boss；1121- rubber bands
Line；1122- air inlets；1123- rubber pistons；12- sieves wall；13- screen clothes；14- sealing rings；15- edges bar.
Embodiment
The utility model is described in further detail with reference to preferred embodiment of the present utility model, but this practicality
New embodiment not limited to this.
Most preferred embodiment of the present utility model：
With reference to shown in accompanying drawing 1-5, a kind of negative pressure pulp classifier testing sieve, including sieve wall 12, sealed with sieve wall 12 upper surface
The lid 11 being detachably connected, and for filtering the screen cloth 13 of cement, the outward flange of screen cloth 13 is fixedly connected with edge bar
15, the section of edge bar 15 is L-shaped to be set, and horizontal edge lengths are less than vertical edge lengths, and vertical edge madial wall has and institute
The internal thread of the external screw thread matching set on the sieve outer wall of wall 12 is stated, the sieve wall 12 on the opposite face of edge bar 15 with being additionally provided with circle
Sealing ring 14 is installed in connected in star, the circular groove.
In the present embodiment, the lid 11 protrudes formation close to outer edge and is embedded in the sieve wall 12 simultaneously straight down
The boss 113 being tightly connected with the inner side of sieve wall 12, the upper surface middle part of lid 11 is provided with the spherical handle for being easy to taking and placing
111, the depressimeter for sieving air pressure inside value for viewing test with being connected inside testing sieve is also fixedly connected with the lid 11
112。
In the present embodiment, the depressimeter 112 include piston cavity, in the piston cavity and and piston cavity
The rubber piston 1123 that inwall is slidably connected, the rubber piston 1123 by being connected at the top of rubber band line 1121 and piston cavity and
The air inlet 1122 with being connected inside piston cavity is provided with the side wall at the top of piston cavity.
The utility model also provides a kind of negative pressure pulp classifier with above-mentioned testing sieve, specifically includes what is be tightly connected successively
Dust jar 2, the first valve 9, gas tank 8, filter 10, the second valve 4, vacuum suction machine 5, the exhaust of the vacuum suction machine 5
End is in communication with the outside by the exhaust outlet 6 connected with pulp classifier housing 3.
Operation principle and using method：When carrying out cement screening using the utility model, the first valve 9 is first shut off,
Open the second valve 4, open vacuum suction machine 5, in the presence of vacuum suction machine 5, be stored in air in gas tank 8 gradually by
Extraction is gone out, and the vacuum in gas tank 8 gradually increases, and becomes substantially low when hearing the running sound of vacuum suction machine 5 from clear and melodious
The second valve 4 is closed after heavy, vacuum suction machine 5 is then turned off.Vacuum state or nearly vacuum state are now in gas tank 8,
Its pressure value is well below normal atmosphere (An) value, it would be desirable to which the cement sample of screening is put into testing sieve, covers tightly lid 11, slowly
First valve 9 is opened and connects gas tank 8 with the testing sieve 1 and dust jar 2, due to there is draught head, testing sieve 1 is stored in
Progressively flowed in gas tank 8 with the air in dust jar 2.What deserves to be explained is, the opening and closing degree of the flow velocity of air and the first valve 9
It is relevant, open bigger, air velocity is bigger, and the negative pressure value of moment is bigger, conversely, the opening degree of the first valve 9 is smaller, it is empty
Gas velocity is smaller, and the negative pressure value of moment is bigger, but with the flowing of air, air pressure can reach balance in a short time and same,
There is pressure difference then at the upper and lower part of screen cloth 13 of testing sieve, and then make cement in the presence of pressure difference that granularity is small
Cement granules in the aperture of screen cloth 13 are sieved.Because the sieve wall 12 of lid 11 and testing sieve is tightly connected, therefore, when
It is internally formed inside testing sieve with gas tank 8 after complete connect, even if air pressure inside is significantly lower than atmospheric pressure, cement can not be in pressure
It is strong it is poor in the presence of pass through screen cloth 13；Therefore, depressimeter 112 now just serves the effect of regulation pressure difference.Concrete principle
It is：Due to the piston cavity and the connects with the internal cavities of testing sieve of depressimeter 112, therefore, when air pressure inside is strongly reduced, institute
Stopple cavity is stated positioned at the air pressure of the bottom of piston 1123 also therewith to reduce, can be with by the scale that is arranged on the piston cavity
It was observed that the changing condition of negative pressure value, with the continuous increase of this negative pressure value, piston 1123 is in the presence of atmospheric pressure along work
Plug cavity is moved downward, and air constantly enters the top that piston cavity is located at piston 1123, rubber band line by air inlet 1122
1121 are constantly elongated with moving down for piston, when piston 1123 is located at piston cavity with testing sieve cavity junction, lose
Airtight effect is removed, the pressure that air is entered inside testing sieve, increase testing sieve forms pressure difference, cement carries out negative pressure again
Screening.Due to the pressure increase in testing sieve, piston 1123 gradually rises in the presence of rubber band line 1121, constantly repeats above-mentioned
Process, until sieve test is completed.
What deserves to be explained is：When the negative pressure value of gas tank 8 is not enough, the second valve can be still opened during sieve test
Door 4, opens vacuum drawn machine 5 and increases the negative pressure value that experiment needs.But it should not be tested in this manner for a long time, no person's mistake
The load of filter 10 can increase, and the filter inside filter 10 can be blocked during experiment with the cement dust of air circulation
Core, shortens the service life of filter core.
In the present embodiment, the gas tank 8 is also associated with vacuum table 7.The purposes of vacuum table 7 is set to be to carry out very
Negative pressure condition in sky extraction and negative pressure screening process in complete monitoring gas tank 8, to be adjusted, it is ensured that optimal negative pressure value is entered
Row experiment.
It is described above, only it is preferred embodiment of the present utility model, any formal limit is not done to the utility model
System, every any simple modification made according to technical spirit of the present utility model to above example, equivalent variations are each fallen within
Within protection domain of the present utility model.
Claims (6)
1. a kind of negative pressure pulp classifier testing sieve, including sieve wall（12）, with sieve wall（12）The lid that upper surface sealing is detachably connected
Son（11）, and for filtering the screen cloth of cement（13）, it is characterised in that the screen cloth（13）Outward flange is fixedly connected with edge
Bar（15）, the edge bar（15）Section is L-shaped to be set, and horizontal edge lengths are less than vertical edge lengths, vertical edge madial wall tool
Have and the sieve wall（12）The internal thread of the external screw thread matching set on outer wall, the sieve wall（12）With edge bar（15）Opposite face
On be additionally provided with circular groove, the circular groove sealing ring be installed（14）.
2. a kind of negative pressure pulp classifier testing sieve according to claim 1, it is characterised in that the lid（11）Close to outer
Formation is protruded straight down and is embedded in the sieve wall in edge（12）It is interior and with sieve wall（12）The boss that inner side is tightly connected
（113）, the lid（11）Upper surface middle part is provided with the spherical handle for being easy to taking and placing（111）, the lid（11）On it is also solid
Surely it is connected with the depressimeter for sieving air pressure inside value for viewing test with being connected inside testing sieve（112）.
3. a kind of negative pressure pulp classifier testing sieve according to claim 2, it is characterised in that the depressimeter（112）Bag
Piston cavity is included, the rubber piston being slidably connected in the piston cavity and with piston cavity inwall（1123）, it is described
Rubber piston（1123）Pass through rubber band line（1121）With being connected and being set on the side wall at the top of piston cavity at the top of piston cavity
It is equipped with the air inlet with being connected inside piston cavity（1122）.
4. a kind of negative pressure pulp classifier, it is characterised in that with the testing sieve described in any one in claim 1-3.
5. a kind of negative pressure pulp classifier according to claim 4, it is characterised in that including the dust jar being tightly connected successively
（2）, the first valve（9）, gas tank（8）, filter（10）, the second valve（4）, vacuum suction machine（5）, the vacuum suction machine
（5）Exhaust end by with pulp classifier housing（3）The exhaust outlet of connection（6）It is in communication with the outside.
6. a kind of negative pressure pulp classifier according to claim 5, it is characterised in that the gas tank（8）It is also associated with vacuum table
（7）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720349510.9U CN206594020U (en) | 2017-04-05 | 2017-04-05 | A kind of negative pressure pulp classifier and testing sieve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720349510.9U CN206594020U (en) | 2017-04-05 | 2017-04-05 | A kind of negative pressure pulp classifier and testing sieve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206594020U true CN206594020U (en) | 2017-10-27 |
Family
ID=60120793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720349510.9U Expired - Fee Related CN206594020U (en) | 2017-04-05 | 2017-04-05 | A kind of negative pressure pulp classifier and testing sieve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206594020U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114582207A (en) * | 2022-03-17 | 2022-06-03 | 四川建筑职业技术学院 | Demonstration instrument for relation between fluid pressure and flow velocity |
| TWI802381B (en) * | 2022-04-21 | 2023-05-11 | 普家康興業股份有限公司 | Gas positive and negative pressure detection device and detection method for water filter element |
-
2017
- 2017-04-05 CN CN201720349510.9U patent/CN206594020U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114582207A (en) * | 2022-03-17 | 2022-06-03 | 四川建筑职业技术学院 | Demonstration instrument for relation between fluid pressure and flow velocity |
| TWI802381B (en) * | 2022-04-21 | 2023-05-11 | 普家康興業股份有限公司 | Gas positive and negative pressure detection device and detection method for water filter element |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171027 Termination date: 20210405 |