CN104499735B - A kind of negative pressure weighs cover - Google Patents
A kind of negative pressure weighs cover Download PDFInfo
- Publication number
- CN104499735B CN104499735B CN201410392277.3A CN201410392277A CN104499735B CN 104499735 B CN104499735 B CN 104499735B CN 201410392277 A CN201410392277 A CN 201410392277A CN 104499735 B CN104499735 B CN 104499735B
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- air
- workspace
- filter
- plate
- negative pressure
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H1/00—Buildings or groups of buildings for dwelling or office purposes; General layout, e.g. modular co-ordination or staggered storeys
- E04H1/12—Small buildings or other erections for limited occupation, erected in the open air or arranged in buildings, e.g. kiosks, waiting shelters for bus stops or for filling stations, roofs for railway platforms, watchmen's huts or dressing cubicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
Abstract
The invention discloses a kind of negative pressure weighs cover, the negative pressure is weighed cover and is built with combined wall splicing assembling by aluminium section bar, including upper box, machine room, lower box, workspace, protection zone and control system；The monitoring system is arranged on control panel；Roughing efficiency air filter and medium effeciency filter is provided with the inside of the lower box on return air plate, the lower box base angle is provided with ups power, the machine room is provided with main air blower and DC fan, high efficiency particulate air filter A, high efficiency particulate air filter B is provided with the upper box, the high efficiency particulate air filter A is sealed by liquid seal trough, its air outlet is provided with stream lamina membranacea and high speed aerofoil, and the high speed aerofoil is communicated with high speed air curtain；Buffering dividing plate is additionally provided with the top box body；The present invention using vertical one-way gas flow, bilateral high efficiency particulate air filter, maintenance work area interior circulation and partial discharge, is made workspace negative pressure prevent cross pollution, protects the safety of external environment and indoor occupant using workspace and protection zone dual zone structure.
Description
Technical field
The present invention relates to a kind of powdery class medicine or liquid medicine weighing technology apparatus field, more particularly to a kind of negative pressure claims
Amount cover.
Background technology
It is a kind of open room special for places such as pharmacy, microbe research and scientific experiments to weigh cover, is used for
Carry out dust, reagent to weigh, dispense.After processing using normal room is clean between existing most weighing, use as between weighing,
Without corresponding air treatment system, more without supporting automation control system, it is difficult to control that dust, reagent are excessive, raise up,
Pollution, staff easily suck dust, reagent and form harm to health, but also there is the intersection dirt of dust, reagent
Dye, jeopardizes the safety of external environment and indoor occupant.
The utility model patent of Patent No. " 201020695956.5 ", discloses between a kind of weighing, including room body and title
Amount platform, weight-scale table are arranged in room body, also include laminar flow hood, air port and exhaust outlet, and the laminar flow hood is arranged in room body, weight-scale table
Top, the air port is arranged at the top of room body, and the exhaust outlet is arranged at the bottom of room body, is provided with outside the exhaust outlet
Exhaust blower；Although the patent defines simple air circulation system, but whole system structure is excessively simple, it is impossible to complete to sky
The high-efficient purification of gas and at the uniform velocity control, really can not solve the problems, such as tradition weigh between environmental pollution and cross-infection.
Existing negative pressure is weighed cover and is typically filtered using high efficiency particulate air filter, due to weighing cover body and and high efficiency filter
Between device, distance is excessive, easily forms closed self-loopa, and contaminated air band is not walked, and does not thus reach the effect of hundred grades of laminar flows,
Cause negative pressure to weigh cover to be difficult to reach the requirement of new edition GMP；Defect is：1. weigh cover and be typically workspace air pressure and ambient pressure phase
With, cross pollution is easily produced, the cleanliness factor for weighing cover cannot be guaranteed；Although 2. cover inner laminar flow between common weighing, can be ensured
And wind speed, but, in cover and cover external differential is that to flow cover interior 100 grades on the occasion of the contaminant particle of, other inferior grade clean areas
Area is got off by laminar flow again, pollutes the powdery class medicine or liquid medicine for weighing；3. when weighing, powdery class medicine or liquid meeting
Other clean areas are floated or spill into, some weighing cover dress fan Men Laizuo separate, and the earial drainage of crack between a door and its frame can be more serious；4. negative pressure claims
Although amount is covered on, it is difficult not reaching the vacuum effect for preventing spreading.
Content of the invention
For solving above-mentioned technical problem, the invention provides a kind of negative pressure weighs cover, for deficiency of the prior art, adopt
With workspace and protection zone dual zone structure, it is ensured that negative pressure weighs cover inner laminar flow and wind speed, office work area and protection zone pressure
Difference is negative value, and the powdery class medicine or liquid weighed in cover will not overflow or be diffused into other clean area；Using vertical list
To air-flow, bilateral high efficiency particulate air filter, part pure air is circulated in workspace, be partly expelled near zone, make workspace
Negative pressure is produced, cross pollution is prevented, for ensureing the high-cleanness, high environment of workspace；Designed using the adjustable air curtain in protection zone, from
Fundamentally prevent reverse sinuous flow pollution from occurring.
For reaching above-mentioned purpose, technical scheme is as follows：A kind of negative pressure weighs cover, including combined wall, top box
Body, machine room, lower box, weight-scale table, workspace, high speed air curtain, protection zone, high speed aerofoil, return air plate, air draft plate, stream lamina membranacea,
Roughing efficiency air filter, medium effeciency filter, high efficiency particulate air filter A, high efficiency particulate air filter B, blast regulator, buffering dividing plate, LED cold light lamps,
Fast replacing device, ups power, differential pressure pickup, regulator cubicle, PLC control cabinet, main air blower, DC fan, air velocity transducer, vertical
Laminar winds, air draft, protection wind, control panel, pointer differential pressure indicator, touch manipulation screen, scram button, nut, L-shaped briquetting, screw rod,
Fixed frame, air door are installed, adjust guide rail, aperture of door plate, motion bar, adjusting nut, rubber shearing shock absorber, it is characterised in that：
The negative pressure is weighed cover and is built with combined wall splicing assembling by aluminium section bar, including upper box, machine room, nowel
Body, workspace, protection zone and monitoring system；The lower box and machine room are located at the rear portion of the workspace, the top box position
In the top of the workspace, the workspace is unidirectional open type stereo region, is provided with protection zone on the outside of the workspace,
The monitoring system is arranged on the control panel of workspace；It is provided with return air plate between the lower box and workspace, described time
Aerofoil is provided with two pieces, parallel is assemblied in workspace bottom；Be provided with return air plate on the inside of the lower box roughing efficiency air filter and
Medium effeciency filter, the roughing efficiency air filter and the medium effeciency filter are fixed on the return air plate by fast replacing device,
The lower box base angle is provided with ups power, and rear side welding in the middle part of the lower box is provided with regulator cubicle, in the middle part of the lower box
Front side welding is provided with PLC control cabinet, is spirally connected and is provided with differential pressure pickup in the nowel body；The machine room rubber shearing subtracts
The device that shakes is fixedly installed main air blower and DC fan, the main air blower and DC fan air inlet respectively by air channel with described in
The air outlet connection of effect filter, the main air blower are connected with the upper box with DC fan air outlet；Set in the upper box
High efficiency particulate air filter A, high efficiency particulate air filter B is equipped with, the high efficiency particulate air filter A is sealed by liquid seal trough, the high efficiency particulate air filter A assemblings
Air velocity transducer is provided with the surface of the workspace, the high efficiency particulate air filter A, the high efficiency particulate air filter A air outlets
Stream lamina membranacea and high speed aerofoil is provided with, the stream lamina membranacea is communicated with the workspace, the high speed aerofoil and high speed air curtain
Communicate；High efficiency particulate air filter B is provided with front of the upper box, and the high efficiency particulate air filter B air outlets are provided with blast regulator, institute
State；Buffering dividing plate, the buffering is additionally provided with the top box body
Dividing plate is assemblied in the top of the protection zone；Weight-scale table is provided with the workspace, below the weight-scale table, return air is provided with
Plate, is provided with control panel above the weight-scale table, is provided with multiple LED cold light lamps, the workspace above the workspace
Outside is provided with protection zone, and the protection zone is opened with extraneous air and communicated；Between the workspace and the protection zone, by pushing up
The high speed aerofoil air-out in portion forms high speed air curtain；The roughing efficiency air filter, the medium effeciency filter, the high efficiency particulate air filter
Air inlet and air outlet are provided with differential pressure pickup；The monitoring system includes control panel, pointer differential pressure indicator, touches manipulation
Screen, scram button；Multiple pointer differential pressure indicators are provided with the control panel, are provided with touch manipulation on the touch manipulation screen
Key and touch display；The regulator cubicle, the ups power, the air velocity transducer, the differential pressure pickup, the main wind
Machine, the DC fan are electrically connected with the PLC control modules in the PLC control cabinet；Described touch manipulation screen with described
PLC control cabinet is electrically connected.
The fast replacing device includes nut, L-shaped briquetting, screw rod, installation fixed frame；The L-shaped briquetting is by screw rod and spiral shell
Mother is fixedly connected on the roughing efficiency air filter on the return air plate, the medium effeciency filter by install fixed frame and screw rod,
Nut crimps fixation with roughing efficiency air filter one.
The blast regulator includes air door, adjusts guide rail, aperture of door plate, motion bar, adjusting nut；The regulation guide rail sets
Two are equipped with, the air door is provided with two, the air door is relative to be movably arranged；The motion bar is lived with the air door respectively
Dynamic connection, described two movable boom ends are fixedly connected on vertical screw mandrel, and the adjusting nut is connected with the vertical screw mandrel,
Upper and lower, the aperture of further damper of the vertical screw mandrel can adjust by the rotation of adjusting nut, so as to realize wind
Amount is adjusted.The blast regulator arranged in the upper box proportionally discharges a certain amount of air quantity by high efficiency particulate air filter B, from
And have adjusted indirectly the air output of high efficiency particulate air filter A.
The high speed aerofoil angle adjustable, the angle of regulation range are 0 30 degree.
The regulator cubicle is provided with frequency converter, and the frequency converter is electrically connected with main air blower.
The composite wall body structure is assembled by filled board, is fixedly connected by aluminium section bar between plate and plate, described multiple
Conjunction wall body structure is SUS304 stainless steels+magnesium oxide plate+honeycomb card board+magnesium oxide plate+SUS304 stainless steels；Have intensity high,
Good heat insulating, soundproof effect are good, the good advantage of damping property.
The DC fan is electrically connected with the ups power, and when the case of emergency such as power failure occurs suddenly, ups power is used
DC fan is powered when powering to monitoring system and have a power failure, it is ensured that negative pressure weighs the reliable reply emergency of cover, the UPS
It is more than 2 hours that power supply maintains power-on time.
The LED cold light lamps are arranged on the workspace top surface, and its illumination reaches more than 500 luxs, for every eight hours
Temperature rise be less than 1 DEG C, under LED equipped with high printing opacity stream film, the light that breaks forth be shadow-free light, it is ensured that weigh accuracy of reading without
By mistake.
The return air plate is fixedly connected on the combined wall using magnet absorption, the assembly surface of the return air plate without
Any bright cartridge screw, without laying dust dead angle in the workspace and protection zone, so that reach GMP requirements.
The buffering dividing plate, its length are consistent with protection section length, and its width weighs work in cover according to different size negative pressure
Make area highly different and respective change, to adjust the width of the protection zone, the width range of the buffering dividing plate is
350mm—430mm.
The manipulation screen that touches is provided with the protection of three-level user cipher, enters control parameter and arranges, by start button, machine
Self-cleaning running status is entered, after the several seconds, cover is weighed and is in normal operating conditions；The PLC module control frequency converter passes through wind speed
Sensor is realized automatically adjusting face wind speed, is controlled elementary, middle and high filter differential pressure whether superpressure by differential pressure pickup, once pressure
Difference exceedes setting value, and monitoring system can be reported to the police.
When burst fortuitous event has a power failure, because UPS is always maintained at powering PLC control cabinet, can be switched to by PLC module
Contingency mode, powers to the DC fan, also just starts DC fan operating, the operation of DC fan, it is ensured that negative pressure claims
Negative pressure state 2 hours or so is in amount cover；Can ensure that personnel deposit the medicine for weighing, personal security is left.
The negative pressure weighs cover air circulation purification process：Open negative pressure and weigh cover power supply, manipulation screen is touched by described
Parameters are set, and the air in the workspace enters the top box via main air blower after just effect, medium effeciency filter are purified
In body, the working region that most air is entered in cover in the way of vertical laminar flow through high efficiency particulate air filter A, another part air
The blast regulator that installs on high efficiency filter device B is by cover, the big small guide vane of damper adjusts exhaust air rate, warp
Filtered air is discharged to cover outer (clean area), till negative pressure is weighed and produces negative pressure in cover (in covering with cover outside pressure reduction
It is negative to be worth), make powdery class medicine is weighed in cover or liquid type medicine will not spill over the outer clean area of cover, the particle outside cover will not
The medicine that pollution is weighed, it is therefore prevented that cross pollution of the medicine to clean area.
1st, the air in combined wall is first filtered through roughing efficiency air filter, medium effeciency filter, is kept watch by frequency conversion fan and is delivered to height
After effect filter A carries out fine filtering purification, major part is flowed lamina membranacea from upper box air outlet and is blown out with uniform sectional wind velocity
Workspace is flowed through, makes whole operation space form top-down air-flow, hanging down for a high-cleanness, high is provided for operating space
Straight laminar flow space, forms the working environment of high-cleanness；
2nd, the protection zone arranged on the outside of working region, is protected the air of working region, the cleaning of working region
Air and extraneous air cannot directly contact, the adjustable air curtain design of employing can further prevent leaking for room air；
3rd, the air pressure in combined wall is detected by differential pressure pickup, and PLC controls are given by this pressure signal transmission
This signal being shown and understand for staff on the touchscreen, PLC is always according to this pressure signal control for device, PLC
The power of frequency conversion fan processed, so as to improve the air pressure of operating space, reaches optimal Stress control and air purification effect；
4th, the fraction air after purifying is sent outside assembled wall through outer circulation air draft plate, makes the air pressure of operating space low
Air pressure outside combined wall, formed negative pressure, can control dust, reagent raise up, excessive, prevent dust, reagent to human body
Inhalation hazard, moreover it is possible to avoid the cross pollution of dust, reagent, protects the safety of external environment and indoor occupant.
5th, by using vertical one-way gas flow, by high, in, roughing efficiency air filter, make air-supply and air draft without remaining powder
Dirt, prevents secondary pollution；By part pure air is circulated in workspace, be partly expelled near zone, produce workspace
Raw negative pressure, ensure that the dust in this region will not diffuse to outdoor to a certain extent, play a part of to protect external environment condition.
By above-mentioned technical proposal, the beneficial effect of technical solution of the present invention is：
1., using workspace and protection zone dual zone structure, it is ensured that negative pressure weighs cover inner laminar flow and wind speed, weigh in cover
Workspace and protection zone pressure reduction are negative value, and protection zone is negative value with external pressure differential, and the powdery class medicine or liquid in weighing cover is not
Can overflow or be diffused into other clean area；Using vertical one-way gas flow, bilateral high efficiency particulate air filter, part pure air is made in work
Make area's circulation, be partly expelled near zone, make workspace produce negative pressure, prevent cross pollution, for ensureing the height of workspace
Cleanliness factor environment.
2. guarantee, in accident, to weigh and still can run well in cover using ups power and DC fan；Using can
Adjust air curtain design, it is ensured that overall air-flow fundamentally prevents reverse sinuous flow pollution from occurring in slave mode；Of the invention overall excellent
Makeup is fitted in combined wall, simple structure, weighs medicine easy access.
3. airflow pattern of the present invention using vertical unidirectional stream, air intake will first pass through roughing efficiency air filter and medium effeciency filter
Pre-filtering, the big dust particle particle in air-flow is disposed, and preliminary purification air protects blower fan and high efficiency particulate air filter to play
Effect, through pretreated air, under the pressure that main air blower is provided, by high efficiency particulate air filter, make up to hundred grades clean
Cleanliness is required；In the present invention, high efficiency particulate air filter greatly strengthen sealing effectiveness, is avoided that and occur letting out using fluid-tight slot sealing arrangement
Leakage, and its equipment is also more convenient.
4. carry out in cover is weighed dust, reagent weigh, packing, can control that dust, reagent are excessive, raise up, prevent powder
The inhalation hazard of dirt, reagent to human body, also avoids the cross pollution of dust, reagent, protects the peace of external environment and indoor occupant
Entirely.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is that a kind of negative pressure disclosed in the embodiment of the present invention weighs cover structure diagram intention；
Fig. 2 is that a kind of negative pressure disclosed in the embodiment of the present invention weighs enlarged diagram right view schematic diagram at cover A；
Fig. 3 is that a kind of negative pressure disclosed in the embodiment of the present invention weighs cover right view schematic diagram；
Fig. 4 is that a kind of negative pressure disclosed in the embodiment of the present invention weighs cover proportional controller schematic diagram, based on wherein Fig. 4 a
View, Fig. 4 b are left view.
Numeral and the corresponding component title represented by letter in figure：
1. 2. upper box of combined wall, 3. machine room, 4. lower box
5. 6. workspace of weight-scale table, 7. high speed air curtain, 8. protection zone
9. 10. return air plate of high speed aerofoil, 11. air draft plate 12. flows lamina membranacea
13. roughing efficiency air filter, 14. medium effeciency filter, 15. high efficiency particulate air filter A, 16. high efficiency particulate air filter B
20. fast replacing device of the buffering dividing plate 19.LED of 17. blast regulator 18. cold light lamps
22. differential pressure pickup of 21.UPS power supplys, 23. regulator cubicle 24.PLC control cabinets
25. main air blower, 26. DC fan, 27. air velocity transducer, 28. vertical laminar flow wind
31. control panel of the protection wind of 29. air draft 30., 32. pointer differential pressure indicator
33. touch manipulation screen 34. scram button, 35. nut 36.L shape briquettings
37. screw rod 38. is installed 39. air door of fixed frame 40. and adjusts guide rail
41. aperture of door plate, 42. motion bar, 43. adjusting nut, 44. rubber shears shock absorber
Specific embodiment
Accompanying drawing in below in conjunction with the embodiment of the present invention, to the embodiment of the present invention in technical scheme carry out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiment.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
According to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the invention provides a kind of negative pressure weighs cover, including combined wall 1, upper box
2nd, machine room 3, lower box 4, weight-scale table 5, workspace 6, high speed air curtain 7, protection zone 8, high speed aerofoil 9, return air plate 10, air draft plate
11st, stream lamina membranacea 12, roughing efficiency air filter 13, medium effeciency filter 14, high efficiency particulate air filter A15, high efficiency particulate air filter B16, air quantity are adjusted
Device 17, buffering dividing plate 18, LED cold light lamps 19, fast replacing device 20, ups power 21, differential pressure pickup 22, the control of regulator cubicle 23, PLC
Case processed 24, main air blower 25, DC fan 26, air velocity transducer 27, vertical laminar flow wind 28, air draft 29, protection wind 30, control panel
31st, pointer differential pressure indicator 32, touch manipulation screen 33, scram button 34, nut 35, L-shaped briquetting 36, screw rod 37, install fixed frame 38,
Air door 39, regulation guide rail 40, aperture of door plate 41, motion bar 42, adjusting nut 43, rubber shearing shock absorber 44.
The negative pressure is weighed cover and is built with the splicing assembling of combined wall 1 by aluminium section bar, including upper box 2, machine room 3, under
Casing 4, workspace 6, protection zone 8 and control system；The lower box 4 and machine room 3 are located at the rear portion of the workspace 6, described
Upper box 2 is located at the top of the workspace 6, and the workspace 6 is unidirectional open type stereo region, on the outside of the workspace 6
Protection zone 8 is provided with, the monitoring system is arranged on 6 control panel 31 of workspace；Between the lower box 4 and workspace 6
Return air plate 10 is provided with, the return air plate 10 is provided with two pieces, parallel is assemblied in 6 bottom of workspace；Return on the inside of the lower box 4
Roughing efficiency air filter 13 and medium effeciency filter 14 is provided with aerofoil 10, and the roughing efficiency air filter 13 and the medium effeciency filter 14 are logical
Cross fast replacing device 20 to be fixed on the return air plate 10,4 base angle of the lower box is provided with ups power 21, the nowel
In the middle part of body 4, rear side welding is provided with regulator cubicle 23, and front side welding in the middle part of the lower box 4 is provided with PLC control cabinet 24, described under
It is spirally connected in casing 4 and is provided with differential pressure pickup 22；The rubber of the machine room 3 is sheared shock absorber 44 and is fixedly installed 25 He of main air blower
DC fan 26, the main air blower 25 and 26 air inlet of DC fan are respectively by air channel and 14 air outlet of the medium effeciency filter
Connection, the main air blower 25 are connected with the upper box 2 with 26 air outlet of DC fan；It is provided with the upper box 2 efficiently
Filter A15, high efficiency particulate air filter B16, the high efficiency particulate air filter A15 are sealed by liquid seal trough, the high efficiency particulate air filter A15 assemblings
Air velocity transducer 27, the high efficiency particulate air filter A15 is provided with the surface of the workspace 6, the high efficiency particulate air filter A15
Air outlet is provided with stream lamina membranacea 12 and high speed aerofoil 9, and the stream lamina membranacea 12 is communicated with the workspace 6, the high speed winds
Plate 9 is communicated with high speed air curtain 7；High efficiency particulate air filter B16, the high efficiency particulate air filter B16 air outlets is provided with front of the upper box 2
Blast regulator 17 is provided with, on 17 outside combined wall 1 of the blast regulator, air draft plate 11 is provided with；The upper box 2
Buffering dividing plate 18 is inside additionally provided with, and the buffering dividing plate 18 is assemblied in the top of the protection zone 8；Arrange in the workspace 6
There is weight-scale table 5, below the weight-scale table 5, be provided with return air plate 10, above the weight-scale table 5, be provided with control panel 31, described
Be provided with multiple LED cold light lamps 19 above workspace 6, on the outside of the workspace 6, be provided with protection zone 8, the protection zone 8 with outer
Portion's air is opened and is communicated；Between the workspace 6 and the protection zone 8, formed at a high speed by 9 air-out of high speed aerofoil at top
Air curtain 7；The roughing efficiency air filter 13, the medium effeciency filter 14, the high efficiency particulate air filter (A, B) air inlet and air outlet are all provided with
It is equipped with differential pressure pickup 22；The monitoring system include control panel 31, pointer differential pressure indicator 32, touch manipulation screen 33, jerk by
Button 34；Multiple pointer differential pressure indicators 32 are provided with the control panel 31, and described touch is provided with touch manipulation on manipulation screen 33
Key and touch display；The regulator cubicle 23, the ups power 21, the air velocity transducer 27, the differential pressure pickup 22,
The main air blower 25, the DC fan 26 are electrically connected with the PLC control modules in the PLC control cabinet 24；Described tactile
Touch manipulation screen 33 to be electrically connected with the PLC control cabinet 24.
The fast replacing device 20 includes nut 35, L-shaped briquetting 36, screw rod 37, installation fixed frame 38；The L-shaped briquetting 36
The roughing efficiency air filter 13 is fixedly connected on the return air plate 10 by screw rod 37 and nut 35, the medium effeciency filter 14
Fixation is crimped by installing fixed frame 38 and screw rod 37, nut 35 with 13 one of the roughing efficiency air filter.
The blast regulator 17 includes air door 39, adjusts guide rail 40, aperture of door plate 41, motion bar 43, adjusting nut 42；Institute
State regulation guide rail 40 and be provided with two, the air door 39 is provided with two, the air door 39 is relative to be movably arranged；The activity
Bar 43 is flexibly connected with the air door 39 respectively, and two motion bars, 43 end is fixedly connected on vertical screw mandrel, the tune
Section nut 42 is connected with the vertical screw mandrel, be can adjust the upper and lower of the vertical screw mandrel by the rotation of adjusting nut 42, is entered one
The aperture of the damper 39 of step, so that realize that air quantity is adjusted.The blast regulator 17 arranged in the upper box is by height
Effect filter B 16 proportionally discharges a certain amount of air quantity, so as to have adjusted indirectly the air output of high efficiency particulate air filter A15.
9 angle adjustable of high speed aerofoil, the angle of regulation range are 0 30 degree.
The regulator cubicle 23 is provided with frequency converter, and the frequency converter is electrically connected with main air blower 25.
1 structure of the combined wall is assembled by filled board, is fixedly connected by aluminium section bar between plate and plate, described multiple
It is SUS304 stainless steels+magnesium oxide plate+honeycomb card board+magnesium oxide plate+SUS304 stainless steels to close 1 structure of body of wall；Have intensity high,
Good heat insulating, soundproof effect are good, the good advantage of damping property.
The DC fan 26 is electrically connected with the ups power 21, when the case of emergency such as power failure occurs suddenly, UPS electricity
Source 21 is used for when powering monitoring system and having a power failure powering DC fan 26, it is ensured that negative pressure weighs the urgent feelings of the reliable reply of cover
Condition, it is more than 2 hours that the ups power 21 maintains power-on time.
The LED cold light lamps 19 are arranged on 6 top surface of the workspace, and its illumination reaches more than 500 luxs, little per 8
When temperature rise be less than 1 DEG C.
The return air plate 10 is fixedly connected on the combined wall 1 using magnet absorption, the assembling of the return air plate 10
Surface, is required so as to reach GMP without laying dust dead angle in the workspace 6 and protection zone 8 without any bright cartridge screw.
The buffering dividing plate 18, its length are consistent with 8 length of protection zone, and its width is weighed in cover according to different size negative pressure
Workspace 6 highly different and respective change, to adjust the width of the protection zone 8, the width model of the buffering dividing plate 18
Enclose for 350mm 430mm.
The manipulation screen 33 that touches is provided with the protection of three-level user cipher, enters control parameter and arranges, by start button, machine
Device enters self-cleaning running status, after the several seconds, weighs cover and is in normal operating conditions；The PLC module control frequency converter passes through wind
Fast sensor 27 is realized automatically adjusting face wind speed, is controlled elementary, middle and high filter (13,14,15,16) by differential pressure pickup 22
Pressure reduction whether superpressure, once pressure difference exceedes setting value, monitoring system can be reported to the police.
When burst fortuitous event has a power failure, because UPS is always maintained at powering PLC control cabinet 24, can be switched by PLC module
To contingency mode, the DC fan 26 is powered, is also just started DC fan 26 and is operated, the operation of DC fan 26 is protected
Card negative pressure is weighed；Can ensure that personnel deposit the medicine for weighing, safety is from next.
Specific implementation step：Open negative pressure and weigh cover power supply, parameters are arranged by the manipulation screen 33 that touches, described
Air in workspace 6 is entered in the upper box 2 via main air blower 25 after just effect, medium effeciency filter (13,14) are purified,
6 region of workspace that most air is entered in cover in the way of vertical laminar flow through high efficiency particulate air filter A15, another part air
The blast regulator 17 that installs on high efficiency particulate air filter B16 is by cover, the big small guide vane of damper adjust exhaust air rate,
Filtered air is discharged to cover outer (clean area), till negative pressure is weighed and produces negative pressure in cover (in covering with cover outside pressure
Difference is negative), make powdery class medicine is weighed in cover or liquid type medicine will not spill over the outer clean area of cover, the particle outside cover is not
The medicine of weighing can be polluted, it is therefore prevented that cross pollution of the medicine to clean area.
1st, the air in combined wall 1 is first filtered through roughing efficiency air filter 13, medium effeciency filter 14, is delivered to by frequency conversion fan 25
After high efficiency particulate air filter A15 carries out fine filtering purification, major part flows lamina membranacea 12 with uniform section wind from 2 air outlet of upper box
Speed blowout flows through workspace 6, makes whole operation space form top-down air-flow, provides a high-cleanness for operating space
The vertical laminar flow space of degree, forms the working environment of high-cleanness；
2nd, the protection zone 8 arranged on the outside of working region, is protected the air of working region, the cleaning of working region
Air and extraneous air cannot directly contact, the adjustable air curtain design of employing can further prevent leaking for room air；
3rd, the air pressure in combined wall 1 is detected by differential pressure pickup 22, and this pressure signal transmission is controlled to PLC
This signal being shown and understand for staff on the touchscreen, PLC 24 is pressed always according to this for device processed 24, PLC 24
Force signal controls the power of frequency conversion fan 25, so as to improve the air pressure of operating space, reaches optimal Stress control and air
Clean-up effect；
4th, the fraction air after purifying is sent outside assembled wall 1 through outer circulation air draft plate 11, makes the gas of operating space
Force down the air pressure outside the combined wall 1, form negative pressure, can control dust, reagent raise up, excessive, prevent dust, reagent to people
The inhalation hazard of body, moreover it is possible to avoid the cross pollution of dust, reagent, protects the safety of external environment and indoor occupant.
5th, by using vertical one-way gas flow, by high, in, roughing efficiency air filter, make air-supply and air draft without remaining powder
Dirt, prevents secondary pollution；By part pure air is circulated in workspace, be partly expelled near zone, produce workspace
Raw negative pressure, ensure that the dust in this region will not diffuse to outdoor to a certain extent, play a part of to protect external environment condition.
By above-mentioned specific embodiment, the invention has the beneficial effects as follows：(1) using workspace and protection zone dual zone knot
Structure, it is ensured that negative pressure weighs cover inner laminar flow and wind speed, it is negative value, protection zone and outside pressure to weigh workspace and protection zone pressure reduction in cover
Difference is negative value, and the powdery class medicine or liquid weighed in cover will not overflow or be diffused into other clean area；Using vertically unidirectional
Air-flow, bilateral high efficiency particulate air filter make part pure air circulate in workspace, are partly expelled near zone, produce workspace
Raw negative pressure, prevents cross pollution, for ensureing the high-cleanness, high environment of workspace；(2) guaranteed using ups power and DC fan
In accident, weigh and still can run well in cover；Designed using unidirectional air curtain and porous weight plate, it is ensured that overall air-flow
In slave mode, fundamentally prevent reverse sinuous flow pollution from occurring；Entirety combined wall board optimization of the invention is assembled, and ties
Structure is simple, weighs medicine turnover and for convenience；(3) airflow pattern of the present invention using vertically unidirectional stream, air intake will first pass through just
Effect filter and medium effeciency filter pre-filtering, the big dust particle particle in air-flow is disposed, preliminary purification air with rise
To the effect of protection blower fan and high efficiency particulate air filter, through pretreated air, under the pressure that main air blower is provided, by efficient
Filter, makes up to hundred grades of purity requirements；In the present invention, high efficiency particulate air filter adopts fluid-tight slot sealing arrangement, it is ensured that sealing
Effect, is avoided that appearance leakage, and its equipment is also more convenient；(4) weigh cover in carry out dust, reagent weigh,
Packing, can control that dust, reagent are excessive, raise up, prevent the inhalation hazard of dust, reagent to human body, also avoid dust, reagent
Cross pollution, protect the safety of external environment and indoor occupant.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Multiple modifications of these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (9)
1. a kind of negative pressure weighs cover, it is characterised in that including combined wall, upper box, machine room, lower box, weight-scale table, work
Area, high speed air curtain, protection zone, high speed aerofoil, return air plate, air draft plate, stream lamina membranacea, roughing efficiency air filter, medium effeciency filter, efficiently
Filter A, high efficiency particulate air filter B, blast regulator, buffering dividing plate, LED cold light lamps, fast replacing device, ups power, pressure difference sensing
Device, regulator cubicle, PLC control cabinet, main air blower, DC fan, air velocity transducer, vertical laminar flow wind, air draft, protection wind, chain of command
Plate, pointer differential pressure indicator, touch manipulation screen, scram button, nut, L-shaped briquetting, screw rod, install fixed frame, air door, regulation guide rail,
Aperture of door plate, motion bar, adjusting nut, rubber shearing shock absorber；The negative pressure is weighed cover and is spliced with combined wall by aluminium section bar
Assembling builds, including monitoring system；The lower box and machine room are located at the rear portion of the workspace, and the upper box is located at described
The top of workspace, the workspace are unidirectional open type stereo region, are provided with protection zone, the prison on the outside of the workspace
Control system is arranged on the control panel of workspace；Return air plate is provided between the lower box and workspace, and the return air plate sets
Two pieces are equipped with, parallel workspace bottom is assemblied in；Be provided with return air plate on the inside of the lower box roughing efficiency air filter and in imitated
Filter, the roughing efficiency air filter and the medium effeciency filter are fixed on the return air plate by fast replacing device, described under
Casing base angle is provided with ups power, and rear side welding in the middle part of the lower box is provided with regulator cubicle, front side weldering in the middle part of the lower box
Connect and be provided with PLC control cabinet, be spirally connected in the nowel body and be provided with differential pressure pickup；The machine room is solid with rubber shearing shock absorber
Main air blower and DC fan are provided with surely, and the main air blower and DC fan air inlet are respectively by air channel and the medium air filtration
Device air outlet is connected, and the main air blower is connected with the upper box with DC fan air outlet；Height is provided with the upper box
Effect filter A, high efficiency particulate air filter B, the high efficiency particulate air filter A are sealed by liquid seal trough, and the high efficiency particulate air filter A is assemblied in described
The surface of workspace, is provided with air velocity transducer in the high efficiency particulate air filter A, and the high efficiency particulate air filter A air outlets are provided with
Lamina membranacea and high speed aerofoil are flowed, and the stream lamina membranacea is communicated with the workspace, and the high speed aerofoil is communicated with high speed air curtain；Institute
State, the high efficiency particulate air filter B air outlets are provided with blast regulator, the air quantity
Air draft plate is provided with the outside of adjuster on combined wall；Buffering dividing plate, the buffering dividing plate dress is additionally provided with the top box body
It is assigned in the top of the protection zone；Weight-scale table is provided with the workspace, return air plate below the weight-scale table, is provided with, described
Control panel is provided with above weight-scale table, multiple LED cold light lamps above the workspace, are provided with, is arranged on the outside of the workspace
There is protection zone, the protection zone is opened with extraneous air and communicated；Between the workspace and the protection zone, described in top
The air-out of high speed aerofoil forms high speed air curtain；The roughing efficiency air filter, the medium effeciency filter, the high efficiency particulate air filter air inlet and
Air outlet is provided with differential pressure pickup；The monitoring system includes control panel, pointer differential pressure indicator, touches manipulation screen, jerk
Button；Multiple pointer differential pressure indicators are provided with the control panel, be provided with touch manipulation key and touch on the touch manipulation screen
Touch display；The regulator cubicle, the ups power, the air velocity transducer, the differential pressure pickup, the main air blower, described
DC fan is electrically connected with the PLC control modules in the PLC control cabinet；The manipulation screen that touches is controlled with the PLC
Case is electrically connected.
2. a kind of negative pressure according to claim 1 weighs cover, it is characterised in that the fast replacing device includes nut, L-shaped pressure
Block, screw rod, installation fixed frame；The roughing efficiency air filter is fixedly connected on described returning by screw rod with nut by the L-shaped briquetting
On aerofoil, the medium effeciency filter crimps fixation by installing fixed frame and screw rod, nut with roughing efficiency air filter one.
3. a kind of negative pressure according to claim 1 weighs cover, it is characterised in that the blast regulator includes air door, tune
Section guide rail, aperture of door plate, motion bar, adjusting nut；The regulation guide rail is provided with two, and the air door is provided with two, described
Air door is relative to be movably arranged；The motion bar is flexibly connected with the air door respectively, and described two movable boom ends are fixed and connected
It is connected on vertical screw mandrel, the adjusting nut is connected with the vertical screw mandrel, is adjusted by the rotation of adjusting nut described vertical
Upper and lower, the aperture of further damper of screw mandrel.
4. a kind of negative pressure according to claim 1 weighs cover, it is characterised in that the high speed aerofoil angle adjustable, institute
Angle of regulation range is stated for 0 30 degree.
5. a kind of negative pressure according to claim 1 weighs cover, it is characterised in that the composite wall body structure is spelled by filled board
Dress is formed, and is fixedly connected by aluminium section bar between plate and plate, the composite wall body structure be SUS304 stainless steels+magnesium oxide plate+
Honeycomb card board+magnesium oxide plate+SUS304 stainless steels.
6. a kind of negative pressure according to claim 1 weighs cover, it is characterised in that the DC fan and the ups power
Electrical connection, it is more than 2 hours that the ups power maintains power-on time.
7. a kind of negative pressure according to claim 1 weighs cover, it is characterised in that the LED cold light lamps are arranged on the work
Make on area's top surface, its illumination reaches more than 500 luxs, temperature rise for every eight hours is less than 1 DEG C.
8. a kind of negative pressure according to claim 1 weighs cover, it is characterised in that the return air plate is fixed using magnet absorption
It is connected on the combined wall, the assembly surface of the return air plate is without any bright cartridge screw and laying dust dead angle.
9. a kind of negative pressure according to claim 1 weighs cover, it is characterised in that the buffering dividing plate, its length and protection
Section length is consistent, and the width range of the buffering dividing plate is 350mm 430mm.
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| CN201410392277.3A CN104499735B (en) | 2014-08-12 | 2014-08-12 | A kind of negative pressure weighs cover |
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| CN201410392277.3A CN104499735B (en) | 2014-08-12 | 2014-08-12 | A kind of negative pressure weighs cover |
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| CN104499735B true CN104499735B (en) | 2017-03-15 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105064734A (en) * | 2015-07-10 | 2015-11-18 | 苏州华达仪器设备有限公司 | Automatic negative pressure weighing room |
| CN105169822B (en) * | 2015-09-11 | 2017-05-10 | 无锡零界净化设备股份有限公司 | Air curtain partition device of negative pressure weighing room |
| CN108593060A (en) * | 2017-09-14 | 2018-09-28 | 苏州天微至胜运动控制技术有限公司 | A kind of negative pressure meausring apparatus and weighing technique |
| CN107990964A (en) * | 2017-11-13 | 2018-05-04 | 京华建设科技有限公司 | A kind of high-efficiency negative-pressure formula weighs cover |
| CN107990516A (en) * | 2017-12-21 | 2018-05-04 | 河北工业职业技术学院 | The aspiration of negative pressure equipment |
| CN113786679A (en) * | 2021-09-23 | 2021-12-14 | 上海飞域实验室设备有限公司 | Novel cover is weighed to net gas balance of negative pressure |
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