CN110281515A - Thin-wall tube width control system - Google Patents
Thin-wall tube width control system Download PDFInfo
- Publication number
- CN110281515A CN110281515A CN201910576655.6A CN201910576655A CN110281515A CN 110281515 A CN110281515 A CN 110281515A CN 201910576655 A CN201910576655 A CN 201910576655A CN 110281515 A CN110281515 A CN 110281515A
- Authority
- CN
- China
- Prior art keywords
- thin
- distance value
- wall tube
- controller
- blower
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/78—Measuring, controlling or regulating
- B29C49/783—Measuring, controlling or regulating blowing pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention belongs to control system fields, specifically provide a kind of thin-wall tube width control system, including body, blower and wind disk, film outlet port are offered on body, film outlet port is for blowing out thin-wall tube；Further include: distance measuring sensor arrives the distance between thin-wall tube for detecting itself；Controller, controller are electrically connected with distance measuring sensor and blower, and maximum desired distance value and smallest ideal distance value are prestored in controller；Controller receives after the distance value of distance measuring sensor transmission, it is compared with the maximum desired distance value and smallest ideal distance value prestored, if being less than smallest ideal distance value, controls blower and reduce wind-force, if more than maximum desired distance value, then controls blower and breeze up.The present invention, can the wind-force size automatically to blower be adjusted, maintain the air pressure in thin-wall tube within the scope of ideal value.
Description
Technical field
The invention belongs to control system field more particularly to a kind of thin-wall tube width control systems.
Background technique
The primary structure of existing inflation film manufacturing machine includes body, blower and wind disk；Feed hopper and film outlet port are offered on body,
The cross section of film outlet port is annular shape；Blower is fixed on the machine body, and wind disk is connected to by air hose with the air outlet of blower, and air hose is worn
The upper plate of body to be crossed, several ventilation holes are provided on wind disk, wind disk is covered with wind column, and wind column is the aerial cylindrical body of upper end closure,
The lower end of wind column is fixed on the upper plate of body, and wind column lower end is located in the annulus where film outlet port, uniformly opens on wind column
There are several exhaust vents.
Raw material enters body from feed hopper, blows out from film outlet port, becomes cylindrical membrane, i.e. thin-wall tube.Thin-wall tube is by wind column
It covering in it, the wind-force of blower blowout is blown into wind column by ventilation hole on wind disk, then is blown out by the exhaust vent on wind column, this
Sample, being blown into wind-force in thin-wall tube can be relatively stable, uniform, can preferably maintain the air pressure in thin-wall tube.Thin-walled after forming
The upper end of pipe is pulled up by two traction rollers.
But after Fan Regulation to best wind-force size, due to blower self-heating etc., real wind-force will not
It is maintained at best wind-force, but is stirred in a wind ranges, therefore, the air pressure in thin-wall tube can have fluctuation, but film
Very thin thickness, very light weight, a small variation of thin-walled intraductal atmospheric pressure will make the width of thin-wall tube change, in turn
The thickness of film, transparency is caused to change, film is easy to appear defect ware.
Summary of the invention
The present invention is in view of the above-mentioned problems, provide a kind of thin-wall tube width control system.
Base case provided by the invention are as follows:
Thin-wall tube width control system, including body, blower and wind disk offer film outlet port on body, and film outlet port is used for
Blow out thin-wall tube；Further include:
Distance measuring sensor arrives the distance between thin-wall tube for detecting itself；
Controller, controller are electrically connected with distance measuring sensor and blower, prestored in controller maximum desired distance value and
Smallest ideal distance value；
After controller receives the distance value of distance measuring sensor transmission, with the maximum desired distance value prestored and minimum reason
Think that distance value compares, if being less than smallest ideal distance value, controls blower and reduce wind-force, if more than maximum desired distance
Value, then control blower and breeze up.
Base case working principle and beneficial effect:
Due to the distance between distance measuring sensor and wind disk be it is fixed, itself is detected to thin-wall tube by distance measuring sensor
The distance between, it can be realized that the internal diameter of thin-wall tube, that is, the distance between distance measuring sensor and thin-wall tube are smaller, thin-wall tube
Internal diameter it is bigger.
Maximum desired distance value and smallest ideal distance value are prestored in controller, controller receives distance measuring sensor hair
After the distance value sent, it is compared with maximum desired distance value and smallest ideal distance value.If distance value is in maximum desired
In the range of distance value and smallest ideal distance value, then illustrate that the inner diameter size of thin-wall tube is highly desirable, without the wind-force to blower
It is adjusted.
If the distance value that controller receives is less than smallest ideal distance value, illustrates that the internal diameter of thin-wall tube is bigger than normal, need
Reduce the air pressure inside of thin-wall tube, therefore, controller controls blower and reduces wind-force.
Similarly, if the distance value that controller receives is greater than maximum desired distance value, illustrate that the internal diameter of thin-wall tube is less than normal,
Need to increase the air pressure inside of thin-wall tube, therefore, controller controls blower and increases wind-force.
In this way, the air pressure in thin-wall tube can be made to maintain in a stable value range, and then tie up the internal diameter of thin-wall tube
It holds in an ideal range.
It further, further include alarm, alarm is electrically connected with the controller；Controller control blower increases or reduces wind-force
Afterwards, if later 20-80 seconds, the distance value that controller receives is consistently less than smallest ideal distance value, or is consistently greater than maximum
Ideal distance value, controller control alarm sound an alarm.
After controller controls blower change wind-force, under normal circumstances, the air pressure in thin-wall tube can occur to change accordingly, survey
It can also find to change away from the distance that sensor measures, if the distance value that controller receives is small always in later 20-80 seconds
In smallest ideal distance value, or consistently greater than maximum desired distance value, then illustrate that situation occurs in machine, needs to notify work people
Member.At this point, controller control alarm sounds an alarm.
Further, alarm is combined aural and visual alarm.
Combined aural and visual alarm is alarmed in such a way that sound adds light, under vision and the double stimuli of the sense of hearing, enough
Cause the attention of staff.
Further, controller includes receiving module, judgment module, execution module and memory module；
Receiving module is used to receive the distance value of distance measuring sensor transmission；
Judgment module is for received distance value to be compared with maximum desired distance value and smallest ideal distance value；
Execution module is used to control the wind-force of blower；
Maximum desired distance value and smallest ideal distance value are stored in memory module, memory module is also used to store execution
Module controls blower and reduces the time of wind-force and the time of execution module control blower increase blower wind-force.
In this way, staff is by checking in memory module the time and the execution module control that control blower and reduce wind-force
Blower processed increases the time of blower wind-force, it will be appreciated that the stability of machine operation, convenient for being maintained in time.
Further, controller further includes timing module, and timing module is for calculating and storing the accumulative working hour of body and hold
Continuous working hour.
Explanation of nouns: accumulative working hour, i.e. accumulative operating time；Continue working hour and lasting operating time.
By timing module, staff is recognized that whether machine is rested, maintained.
Further, accumulative maximum value and lasting maximum value are also prestored in memory module；Controller further includes reminding module；
Judgment module is also used to for being compared with accumulative maximum value in accumulative working hour, by lasting working hour and continue maximum value into
Row compares；
Reminding module is used to judge that accumulative working hour has been more than accumulative maximum value when judgment module, or lasting working hour is more than
When continuing maximum value, issues and remind.
When the accumulative working hour of body has been more than accumulative maximum value or lasting working hour has been more than lasting maximum value, illustrate body
It needs to rest or maintain, is reminded at this point, being issued by reminding module, staff is allowed to go and find out what's going on.
Further, the mode of the prompting of reminding module is that voice adds text.
It can cause staff's note that the mode in conjunction with text can then allow the print of staff with the mode of voice
As more deep, more pay attention to.
Further, distance measuring sensor is laser range sensor.
For laser range sensor compared with infrared distance sensor, precision is higher.
Further, axis of the probe of distance measuring sensor towards wind disk.
Measure in this way at a distance from thin-wall tube, can more accurately react the inner diameter size of thin-wall tube.
Further, controller is PLC controller.
Compared with single-chip microcontroller, PLC controller is more suitable industrial application.
Detailed description of the invention
Fig. 1 is the structural scheme of mechanism of thin-wall tube width control system embodiment one of the present invention；
Fig. 2 is the logic diagram of thin-wall tube width control system embodiment one of the present invention.
Specific embodiment
It is further described below by specific embodiment:
Appended drawing reference in Figure of description includes: body 1, thin-wall tube 2, wind disk 3, air hose 4, wind column 5, distance measuring sensor
6。
Embodiment one
It is as shown in Figure 1 and Figure 2:
Thin-wall tube width control system, including body 1, blower and wind disk 3 are provided with film outlet port, membrane on the upper plate of body 1
The cross section of mouth is annular shape, and film outlet port is for blowing out thin-wall tube 2；Blower bolt is on body 1；Wind disk 3 is upper end closure
Hollow cylinder, wind disk 3 is connected to by air hose 4 with the air outlet of blower, the upper plate of the mistake body 1 of air hose 4, the upper end of air hose 4
Nian Jie with wind disk 3 and be connected to, the lower end of air hose 4 and the air outlet of blower are Nian Jie and be connected to.
It is opened on the side wall of wind disk 3 there are four ventilation hole, wind disk 3 is covered with wind column 5, and wind column 5 is the aerial circle of upper end closure
Cylinder, the lower end of wind column 5 are bonded on the upper plate of body 1, and the lower end of wind column 5 is located in the annulus where film outlet port, wind column 5
Side wall on be uniformly provided with six and iris out air holes.
It further include controller, distance measuring sensor 6 and combined aural and visual alarm.
The probe of distance measuring sensor 6 is towards the axis of wind disk 3, and in the present embodiment, distance measuring sensor 6 is laser ranging sensing
Device, the H-PT50 that model is produced by the really long-range Science and Technology Ltd. of Wuhan letter, the laser range sensor precision of the model is high,
Reaction is fast.
Distance measuring sensor 6 is electrically connected with the controller, and the probe of distance measuring sensor 6 is measured in this way towards the axis of wind disk 3
At a distance from thin-wall tube 2, can more accurately react the inner diameter size of thin-wall tube 2.
Alarm is electrically connected with the controller, and alarm is combined aural and visual alarm, and in the present embodiment, combined aural and visual alarm is beneficial source product
The YY-02 model of board, the combined aural and visual alarm sufficient brightness of the model, sound are rung, and can cause the attention of staff immediately.
Controller is PLC controller, and in the present embodiment, controller is the 6ED1052-1HB08-0BA0 type of west gate sub-brand name
Number.
Controller includes receiving module, timing module, judgment module, execution module, memory module and reminding module.
Receiving module is used to receive the distance value of the transmission of distance measuring sensor 6.
Timing module is used to calculate and store the accumulative working hour and lasting working hour of body 1.
Judgment module is for received distance value to be compared with maximum desired distance value and smallest ideal distance value；Also
For accumulative working hour to be compared with accumulative maximum value, lasting working hour is compared with maximum value is continued.
Execution module is used to control the wind-force of blower, is also used to control alarm equipment alarm.
Maximum desired distance value, smallest ideal distance value, accumulative maximum value and lasting maximum value are stored in memory module；
Memory module is also used to store time and the execution module control blower increase blower that execution module control blower reduces wind-force
The time of wind-force.
Reminding module is used to judge that accumulative working hour has been more than accumulative maximum value when judgment module, or lasting working hour is more than
It when continuing maximum value, issues and reminds, in the present embodiment, the mode of prompting is that voice adds text.
After the distance value for receiving the transmission of distance measuring sensor 6, judgment module is by itself and the maximum desired distance value that prestores
And smallest ideal distance value compares, if being less than smallest ideal distance value, execution module controls blower and reduces wind-force, if greatly
In maximum desired distance value, then execution module control blower breezes up.According to the tool of the bias adjustment wind-force size of distance value
Body numerical value, those skilled in the art can be specifically arranged according to specific model.
After execution module control blower increases or reduces wind-force, if later 40 seconds, the distance value that receiving module receives
It is consistently less than smallest ideal distance value, or consistently greater than maximum desired distance value, execution module control alarm sounds an alarm.
Specific implementation process:
After controller receives the distance value of the transmission of distance measuring sensor 6, by itself and maximum desired distance value and smallest ideal
Distance value compares.If distance value illustrates thin-wall tube 2 in the range of maximum desired distance value and smallest ideal distance value
Internal diameter in the ideal range, be adjusted without the wind-force to blower.
If the distance value that controller receives is less than smallest ideal distance value, illustrates that the internal diameter of thin-wall tube 2 is bigger than normal, need
Reduce the air pressure inside of thin-wall tube 2, therefore, controller controls blower and reduces wind-force.Similarly, if the distance value that controller receives
Greater than maximum desired distance value, then illustrates that the internal diameter of thin-wall tube 2 is less than normal, need to increase the air pressure inside of thin-wall tube 2, therefore, control
Device control blower processed increases wind-force.
After execution module controls blower change wind-force, under normal circumstances, the air pressure in thin-wall tube 2 can occur to become accordingly
Change, the distance that distance measuring sensor 6 measures can also find to change, if the distance value that receiving module receives begins in later 40 seconds
It is less than smallest ideal distance value, or consistently greater than maximum desired distance value eventually, then illustrates that situation occurs in machine, need to notify work
Make personnel.At this point, controller control alarm sounds an alarm, in the present embodiment, combined aural and visual alarm adds the side of light by sound
Formula is alarmed, and under vision and the double stimuli of the sense of hearing, causes the attention of staff enough.Staff can stop
The operation of machine, and it is overhauled.
Staff is by checking in module memory module the time and the execution module control that control blower and reduce wind-force
The time of blower increase blower wind-force, it will be appreciated that the job stability of body 1 and blower, convenient for being maintained in time.
When the accumulative working hour of body 1 has been more than accumulative maximum value or lasting working hour has been more than lasting maximum value, mould is reminded
Block issues the prompting that text adds voice, and staff is allowed to go and find out what's going on.
Embodiment two
Compared with embodiment one, in the present embodiment, the lower half portion internal diameter of wind disk 3 is greater than top half internal diameter.Air hose 4
Outer diameter is greater than 3 top half internal diameter of wind disk, and is less than 3 lower half portion internal diameter of wind disk, the upper end of ventilation duct 4 be located at wind disk 3 it is interior and
It is flexibly connected with the lower half portion of wind disk 3.
The top half of wind disk 3 is opened there are four ventilation hole, and four ventilation holes etc. are high big, and between any two ventilation holes
It is equidistant, on by 3 axis outwardly direction of wind disk, ventilation hole is tilted down.Wind is let out there are two opening in the lower half portion of wind disk 3
Hole, two are let out that air holes is contour and wait big, and letting out air holes is horizontally toward three millimeters of top of the upper end apart from 3 lower half portion of wind disk.
In use for some time, the ventilation hole on wind disk 3 by impurity it sometimes appear that the case where being blocked.When air holes is blocked
When plug, the air holes can not outside outlet air, in the case where the wind-force of blower remains unchanged, the air pressure in wind disk 3 be will increase, air pressure
After increase, wind disk 3 can upward sliding, sliding distance be more than after three millimeters on ventilation duct 4, and air holes is let out in exposing, is let out air holes and is exposed
Afterwards, the ventilation hole that do not block with let out outside outlet air together with air holes, air pressure in wind disk 3 reduces, and 3 slide downward of wind disk falls back to
On ventilation duct 4.
In this way, by sliding up and down for wind disk 3, being also able to maintain air pressure in air hose 4 even if some ventilation hole is plugged
It is relatively stable.
Simultaneously as some air holes is plugged, wind disk 3 will not straight up and down, but can rotate on one side when sliding up and down
It slides up and down on one side.In such manner, it is possible to keep the air quantity of all directions in air hose 4 more uniform.Also, wind disk 3 is being rotating up and down
When sliding, glide all can generate collision with ventilation duct 4 every time, since from 3 axis outwardly direction of wind disk, ventilation hole is downward
Impurity in ventilation hole can be shaken off outward part every time when collision by inclination.
After impurity loosens, continue the inside wind pressure that shake adds wind disk 3, it can be all outside by the impurity in ventilation hole
It removes.
It still is able to metastable work, and can when the ventilation hole on wind disk 3 is plugged using this system
Ventilation hole is dredged in work.
What has been described above is only an embodiment of the present invention, and the common sense such as well known specific structure and characteristic are not made herein in scheme
Excessive description, technical field that the present invention belongs to is all before one skilled in the art know the applying date or priority date
Ordinary technical knowledge can know the prior art all in the field, and have using routine experiment hand before the date
The ability of section, one skilled in the art can improve and be implemented in conjunction with self-ability under the enlightenment that the application provides
This programme, some typical known features or known method should not become one skilled in the art and implement the application
Obstacle.It should be pointed out that for those skilled in the art, without departing from the structure of the invention, can also make
Several modifications and improvements out, these also should be considered as protection scope of the present invention, these all will not influence the effect that the present invention is implemented
Fruit and patent practicability.The scope of protection required by this application should be based on the content of the claims, the tool in specification
The records such as body embodiment can be used for explaining the content of claim.
Claims (10)
1. thin-wall tube width control system, including body, blower and wind disk, film outlet port is offered on body, film outlet port is for blowing
Thin-wall tube out；It is characterized by further comprising:
Distance measuring sensor arrives the distance between thin-wall tube for detecting itself；
Controller, controller are electrically connected with distance measuring sensor and blower, and maximum desired distance value and minimum are prestored in controller
Ideal distance value；
After controller receives the distance value of distance measuring sensor transmission, with the maximum desired distance value and smallest ideal that prestore away from
It is compared from value, if being less than smallest ideal distance value, controls blower and reduce wind-force, if more than maximum desired distance value, then
Control blower breezes up.
2. thin-wall tube width control system according to claim 1, it is characterised in that: further include alarm, alarm with
Controller electrical connection；Controller control blower increase or reduce wind-force after, if later 20-80 seconds, controller receive away from
It is consistently less than smallest ideal distance value, or consistently greater than maximum desired distance value from value, controller control alarm sounds an alarm.
3. thin-wall tube width control system according to claim 2, it is characterised in that: alarm is combined aural and visual alarm.
4. thin-wall tube width control system according to claim 3, it is characterised in that: controller includes receiving module, sentences
Disconnected module, execution module and memory module；
Receiving module is used to receive the distance value of distance measuring sensor transmission；
Judgment module is for received distance value to be compared with maximum desired distance value and smallest ideal distance value；
Execution module is used to control the wind-force of blower；
Maximum desired distance value and smallest ideal distance value are stored in memory module, memory module is also used to store execution module
It controls blower and reduces the time of wind-force and the time of execution module control blower increase blower wind-force.
5. thin-wall tube width control system according to claim 4, it is characterised in that: controller further includes timing module,
Timing module is used to calculate and store the accumulative working hour and lasting working hour of body.
6. thin-wall tube width control system according to claim 5, it is characterised in that: also prestored in memory module accumulative
Maximum value and lasting maximum value；Controller further includes reminding module；
Judgment module is also used to for being compared with accumulative maximum value in accumulative working hour, and lasting working hour is compared with maximum value is continued
Compared with；
Reminding module is used to judge that when accumulative working hour be more than accumulative maximum value when judgment module, or lasting working hour has been more than to hold
When continuous maximum value, issues and remind.
7. thin-wall tube width control system according to claim 6, it is characterised in that: the mode of the prompting of reminding module is
Voice adds text.
8. thin-wall tube width control system according to claim 7, it is characterised in that: distance measuring sensor is laser ranging biography
Sensor.
9. thin-wall tube width control system according to claim 8, it is characterised in that: the probe of distance measuring sensor is towards wind
The axis of disk.
10. thin-wall tube width control system according to claim 9, it is characterised in that: controller is PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910576655.6A CN110281515B (en) | 2019-06-28 | 2019-06-28 | Thin-walled tube width control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910576655.6A CN110281515B (en) | 2019-06-28 | 2019-06-28 | Thin-walled tube width control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110281515A true CN110281515A (en) | 2019-09-27 |
| CN110281515B CN110281515B (en) | 2021-05-28 |
Family
ID=68020005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910576655.6A Active CN110281515B (en) | 2019-06-28 | 2019-06-28 | Thin-walled tube width control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110281515B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0272930A (en) * | 1988-09-07 | 1990-03-13 | Dainippon Printing Co Ltd | Manufacturing system for synthetic resin vessel |
| CN1065037A (en) * | 1991-03-21 | 1992-10-07 | 明尼苏达州采矿制造公司 | Make the equipment and the method for long band |
| CN2371024Y (en) * | 1999-05-10 | 2000-03-29 | 马镇鑫 | Internal cooling controller for plastic tubular film blowing machine |
| CN101337429A (en) * | 2008-08-06 | 2009-01-07 | 大连橡胶塑料机械股份有限公司 | High-precision inner-cooling automatic control system |
-
2019
- 2019-06-28 CN CN201910576655.6A patent/CN110281515B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0272930A (en) * | 1988-09-07 | 1990-03-13 | Dainippon Printing Co Ltd | Manufacturing system for synthetic resin vessel |
| CN1065037A (en) * | 1991-03-21 | 1992-10-07 | 明尼苏达州采矿制造公司 | Make the equipment and the method for long band |
| CN2371024Y (en) * | 1999-05-10 | 2000-03-29 | 马镇鑫 | Internal cooling controller for plastic tubular film blowing machine |
| CN101337429A (en) * | 2008-08-06 | 2009-01-07 | 大连橡胶塑料机械股份有限公司 | High-precision inner-cooling automatic control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110281515B (en) | 2021-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108481749B (en) | Real-time monitoring three-dimensional printing method and device | |
| EP1826412A2 (en) | Fan with outlet flow measurement | |
| CN107275945B (en) | Outdoor alarm distribution box | |
| CN110281515A (en) | Thin-wall tube width control system | |
| CN107638137A (en) | A kind of robot of voice recognition and its recognition methods | |
| JP3181789U (en) | Hot-wire anemometer verification device | |
| CN109969414A (en) | A kind of Elastic Aircraft pitot protective case | |
| CN206514777U (en) | A kind of sleeve pipe bulge detection means | |
| CN109274770A (en) | A kind of office's intelligent sound monitoring method based on Internet of Things | |
| US4184367A (en) | Nipple flow rate tester | |
| CN206028289U (en) | Automatic fume chamber of putting out a fire | |
| CN206038158U (en) | Ball mill with temperature alarming function | |
| CN106872648A (en) | The fast calibration device and scaling method of nuclear power station fire alarm system hydrogen gas detector | |
| JPH07190431A (en) | Controlled wind velocity automatic alarming apparatus for local exhauster | |
| CN208117009U (en) | Wind-cooling type constant temperature ultraviolet laser device | |
| CN207182626U (en) | Ozone pollution phonetic alarm device | |
| CN206946003U (en) | A kind of through hole detection means | |
| EP3669917B1 (en) | Anesthesia machine exhaust emission control system, and control method therefor | |
| CN205691468U (en) | A kind of solid particulate matter protective garment test experience cabin | |
| CN207232117U (en) | Used in nuclear power station hydrogen gas detector calibration equipment | |
| CN207352761U (en) | A kind of effect cover for being adapted to a variety of flammable and poisonous alarm interface | |
| CN115683234A (en) | Temperature and humidity data acquisition and analysis system for environment | |
| CN207336564U (en) | A kind of simple airflow detecting device of Biohazard Safety Equipment | |
| CN216847159U (en) | Blowing needle seat of nitrogen blow-drying instrument | |
| CN1826148A (en) | Chest drainage device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |