CN208407995U - A kind of automatic adjustment air quantity vent cabinet - Google Patents
A kind of automatic adjustment air quantity vent cabinet Download PDFInfo
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- CN208407995U CN208407995U CN201820725819.8U CN201820725819U CN208407995U CN 208407995 U CN208407995 U CN 208407995U CN 201820725819 U CN201820725819 U CN 201820725819U CN 208407995 U CN208407995 U CN 208407995U
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- air quantity
- automatic adjustment
- adjustment air
- cabinet body
- plc controller
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Abstract
The utility model discloses a kind of automatic adjustment air quantity vent cabinet, including cabinet body, the glass vision panel loaded on cabinet body middle position and the exhaust pipe for testing table top, being set to the gas gathering mask on cabinet body top and connecting with gas gathering mask；It is air intake surface between the glass vision panel and experiment table top；It is characterized by: the venturi valve being provided on the exhaust pipe；The cabinet body further includes automatic adjustment air quantity system；The automatic adjustment air quantity system includes the high sensor of door, face air monitoring device, differential pressure pickup, displacement sensor, valve positioner and the valve actuator that PLC controller and PLC controller are electrically connected；The utility model uses automatic adjustment air quantity system, and personnel operate with securely and reliably, can be with the effective protection person and equipment safety.
Description
Technical field
The utility model relates to laboratory equipment field, especially a kind of automatic adjustment air quantity vent cabinet.
Background technique
Laboratory ventilation is an indispensable component part in lab design.Laboratory worker in order to prevent
It sucks or swallows into some chemical substances and organism toxic, can causing a disease or toxicity is unknown, and in order to prevent some steamings
The absorption of vapour, gas and particle (smog, coal smoke, dust and aerosol) should have good ventilation in laboratory, can use ventilation
Cabinet, ventilator cowling or the method for local ventilation remove, and degassing function are most importantly in the function of vent cabinet, in chemical laboratory
In, when experimental implementation, generates various pernicious gases, foul smell, moisture and inflammable, explosive, corrosive substance, uses to protect
The safety of person, the laboratory where vent cabinet must keep negative pressure state, therefore need to extract bulk gas out from laboratory environment
And it is discharged by vent cabinet outdoor.Currently, ventilation hoods for laboratories mainly passes through two kinds of form air drafts: one is common fixed frequencies to arrange
Wind continues outside air draft with constant exhaust air rate, the interior outside work intracavity gas not overflow to cabinet to guarantee vent cabinet
In environment, which would generally be arranged to a biggish numerical value, therefore this kind of exhaust way will cause room conditioning energy consumption
It is very big, and high noise, it is unfavorable for energy conservation；It is also easy to cause laboratory negative pressure excessively high；Another kind is common frequency conversion air draft, i.e. basis
The service condition of vent cabinet and change air draft air quantity, this mode can reduce certain energy consumption compared with exhaust way above-mentioned, but
It is in multiple vent cabinets and to be connected to constructure ventilation system in use, still cannot be according to the different demands of each vent cabinet air draft
Effectively control exhaust air rate and air draft noise, and existing frequency conversion air draft ventilation hood control system is additional in vent cabinet erecting bed
It installs additional, expends working hour, product quality consistency is poor.
Utility model content
In order to overcome the disadvantages mentioned above of the prior art, the purpose of the utility model is to provide one kind to have automatic adjustment air quantity
The vent cabinet of function.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of automatic adjustment air quantity vent cabinet, packet
Include cabinet body, the glass vision panel loaded on cabinet body middle position and the gas gathering mask and and gas collection tested table top, be set to cabinet body top
Cover the exhaust pipe of connection；It is air intake surface between the glass vision panel and experiment table top；Wherein: being provided on the exhaust pipe
Venturi valve；The cabinet body further includes automatic adjustment air quantity system；The automatic adjustment air quantity system include PLC controller,
The high sensor of door, face air monitoring device, differential pressure pickup, the displacement sensor, valve control being electrically connected with PLC controller
Device and valve actuator processed.
As further improvement of the utility model: the cabinet body is additionally provided with environment monitoring device；The environmental monitoring
Device includes temperature sensor, humidity sensor and display；The temperature sensor and humidity sensor are shown with described respectively
Show that device is connected, the display is mounted in the PLC controller.
As further improvement of the utility model: glass vision panel uses tempered glass, and tempered glass surface recombination has PET
Plastic foil, the surface recombination of PET plastic film have PVC plastic film, and PVC plastic film surface is compounded with hydrophobic layer.
As further improvement of the utility model: the experiment table top is equipped with water power gas system and lighting system；
The water power gas system includes water inlet pipe, sewer, power supply and faucet；The lighting system includes that the lamp with protective cover shines
It is bright.
Compared with prior art, the utility model has the beneficial effects that the utility model uses automatic adjustment air quantity system
System, personnel operate with securely and reliably, can be with the effective protection person and equipment safety.It, can be according to design using venturi valve
It is required that singly complete the control of the variable air rate of separate unit vent cabinet, effectively in time from discharge of pollutant sources toxic gas and particle,
It safely and reliably works, solving common valve need to manually adjust, no automatic function, influence system safety；Pressure is not independent, together
It can influence each other in one system；Control the low problem of precision.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Specific embodiment
Now in conjunction with Detailed description of the invention, the present invention will be further described with embodiment:
Such as Fig. 1, a kind of automatic adjustment air quantity vent cabinet, 2 and of glass vision panel including cabinet body 1, loaded on cabinet body middle position
The exhaust pipe 5 for testing table top 3, being set to the gas gathering mask 4 on cabinet body top and being connect with gas gathering mask 4；2 He of glass vision panel
Testing is air intake surface between table top 3；Wherein: the venturi valve 6 being provided on the exhaust pipe 5；The cabinet body 1 further includes certainly
It is dynamic to adjust air quantity system；The automatic adjustment air quantity system includes the door that PLC controller 7 and PLC controller 7 are electrically connected
High sensor 8, face air monitoring device 9, differential pressure pickup 10, displacement sensor 11, valve positioner 12 and valve actuator
13。
The high sensor 8 of door is used to pass to the position signal of experimenter PLC controller 7, the face wind speed prison
The air quantity data surveyed in the exhaust pipe 5 that device 9 is used to will test pass to PLC controller 7, the pressure difference sensing
The pressure difference data for 13 two sides of the valve actuator that device 10 is used to will test passes to PLC controller 7 and PLC control
Device 7 processed is according to the position signal of the experimenter received, air quantity data and pressure difference data automatic adjusument door position switch and valve
Controller 12 and valve actuator 13；The opening degree of the glass vision panel changes with door position switch；7 real-time measurement of PLC controller
Vent cabinet aperture, while 9 real-time measurement face wind speed of face air monitoring device, and convert it into voltage signal and be transmitted to PLC control
Device 7, PLC controller 7 are compared according to face wind speed actual value with setting value, if wind speed, not in range of set value, PLC is controlled
Device 7 processed is to 12 output signal of valve positioner, and valve positioner 12 is again to 13 output signal of valve actuator, valve actuator 13
The piston of driving 6 valve of venturi moves up and down, and changes ventilation-sectional area, adjusts ventilation volume.
The cabinet body is additionally provided with environment monitoring device；The environment monitoring device includes temperature sensor 14, humidity biography
Sensor 15 and display 16；The temperature sensor 14 and humidity sensor 15 are connected with the display 16 respectively, described
Display 16 is mounted in the PLC controller 7.
Glass vision panel 2 uses tempered glass, and tempered glass surface recombination has PET plastic film, the surface recombination of PET plastic film
There is PVC plastic film, PVC plastic film surface is compounded with hydrophobic layer.
The experiment table top 3 is equipped with water power gas system and lighting system；The water power gas system include water inlet pipe,
Sewer, power supply and faucet 17；The lighting system includes the lamp illumination 18 with protective cover.
Working principle of the utility model is: powering on, vent cabinet is started to work, and the high sensor of door will be for that will test
The position signal of personnel passes to PLC controller, and the face air monitoring device is used for the exhaust duct that will test
Interior air quantity data pass to PLC controller, and the differential pressure pickup is used for the valve actuator two sides that will test
Pressure difference data pass to position signal according to the experimenter received of PLC controller and PLC controller, air quantity data
With pressure difference data automatic adjusument door position switch and valve positioner and valve actuator；PLC controller real-time measurement vent cabinet
Aperture, while face air monitoring device real-time measurement face wind speed, and convert it into voltage signal and be transmitted to PLC controller, PLC control
Device processed is compared according to face wind speed actual value with setting value, if wind speed, not in range of set value, PLC controller is to valve
Controller output signal, for valve positioner again to valve actuator output signal, valve actuator drives the piston of venturi valve
It moves up and down, changes ventilation-sectional area, adjust ventilation volume.
In conclusion after those skilled in the art read the utility model file, skill according to the present utility model
Art scheme and technical concept are not necessarily to creative mental labour and make other various corresponding conversion schemes, and it is practical new to belong to this
The range that type is protected.
Claims (4)
1. a kind of automatic adjustment air quantity vent cabinet including cabinet body, the glass vision panel loaded on cabinet body middle position and experiment table top, is set
The exhaust pipe for being placed in the gas gathering mask on cabinet body top and being connect with gas gathering mask；The glass vision panel and experiment table top between for into
Wind face；It is characterized by: the venturi valve being provided on the exhaust pipe；The cabinet body further includes automatic adjustment air quantity system
System；The automatic adjustment air quantity system includes the high sensor of door, the face wind speed that PLC controller and PLC controller are electrically connected
Monitoring device, differential pressure pickup, displacement sensor, valve positioner and valve actuator.
2. a kind of automatic adjustment air quantity vent cabinet according to claim 1, it is characterised in that: the cabinet body is additionally provided with ring
Border monitoring device；The environment monitoring device includes temperature sensor, humidity sensor and display；The temperature sensor and
Humidity sensor is connected with the display respectively, and the display is mounted in the PLC controller.
3. a kind of automatic adjustment air quantity vent cabinet according to claim 1, it is characterised in that: glass vision panel uses tempering glass
Glass, tempered glass surface recombination have PET plastic film, and the surface recombination of PET plastic film has PVC plastic film, and PVC plastic film surface is multiple
Conjunction has hydrophobic layer.
4. a kind of automatic adjustment air quantity vent cabinet according to claim 1, it is characterised in that: the experiment table top is equipped with
Water power gas system and lighting system；The water power gas system includes water inlet pipe, sewer, power supply and faucet；The illumination
System includes the lamp illumination with protective cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820725819.8U CN208407995U (en) | 2018-05-16 | 2018-05-16 | A kind of automatic adjustment air quantity vent cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820725819.8U CN208407995U (en) | 2018-05-16 | 2018-05-16 | A kind of automatic adjustment air quantity vent cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208407995U true CN208407995U (en) | 2019-01-22 |
Family
ID=65115697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820725819.8U Active CN208407995U (en) | 2018-05-16 | 2018-05-16 | A kind of automatic adjustment air quantity vent cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208407995U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110803788A (en) * | 2019-10-12 | 2020-02-18 | 上海市政工程设计研究总院（集团）有限公司 | Two-gear adjusting air valve device used in intermittent aeration tank of sewage treatment plant |
| CN114992830A (en) * | 2021-03-02 | 2022-09-02 | 中国石油化工股份有限公司 | Nozzle for exhaust system and nozzle air speed adjusting method |
-
2018
- 2018-05-16 CN CN201820725819.8U patent/CN208407995U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110803788A (en) * | 2019-10-12 | 2020-02-18 | 上海市政工程设计研究总院（集团）有限公司 | Two-gear adjusting air valve device used in intermittent aeration tank of sewage treatment plant |
| CN114992830A (en) * | 2021-03-02 | 2022-09-02 | 中国石油化工股份有限公司 | Nozzle for exhaust system and nozzle air speed adjusting method |
| CN114992830B (en) * | 2021-03-02 | 2024-02-09 | 中国石油化工股份有限公司 | Nozzle for exhaust system and nozzle wind speed adjusting method |
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