CN111501390A - Copying system for laboratory and operation method thereof - Google Patents
Copying system for laboratory and operation method thereof Download PDFInfo
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- CN111501390A CN111501390A CN202010385223.XA CN202010385223A CN111501390A CN 111501390 A CN111501390 A CN 111501390A CN 202010385223 A CN202010385223 A CN 202010385223A CN 111501390 A CN111501390 A CN 111501390A
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- Prior art keywords
- pressure
- air supply
- compressed air
- surge tank
- sheet
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/342—Mixing apparatus
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F13/00—Making discontinuous sheets of paper, pulpboard or cardboard, or of wet web, for fibreboard production
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
The invention relates to a sheet making system for a laboratory and an operation method thereof. Wherein, the copy system for laboratory includes: a compressed air supply device for supplying compressed air; a surge tank connected to the compressed air supply device through a first air supply duct, the surge tank being configured to pre-store compressed air; the sheet making machine is connected with the pressure stabilizing tank through a second gas supply pipeline; wherein the first gas supply duct is configured to open prior to the second gas supply duct. When the sheet making system provided by the invention needs gas to stir, the first gas supply pipeline is firstly opened, compressed air is prestored through the pressure stabilizing tank, and after the gas pressure in the pressure stabilizing tank is stable, the second gas supply pipeline is opened to provide the compressed air with stable pressure for the sheet making machine, so that the stirring function is realized, and the problem that the sheet making system cannot work normally due to insufficient gas pressure supplied by the pipeline is avoided.
Description
Technical Field
The invention relates to the field of papermaking, in particular to a sheet making system for a laboratory and an operation method thereof.
Background
The paper making system used in the laboratory at present is a small laboratory paper making system for collecting paper forming and drying, and has high automation degree. In the process of forming paper, a large amount of compressed air is required to be injected into the pulp, and a large amount of bubbles are formed in the pulp, so that the stirring purpose is achieved, but in the process of gas stirring, the phenomenon of instantaneous insufficient air pressure can occur, and the working efficiency and the consistency of sample preparation are influenced.
Disclosure of Invention
Some embodiments of the invention provide a sheet making system for a laboratory and an operation method thereof, which are used for relieving the problem of unstable air pressure.
Some embodiments of the present invention provide a sheet system for a laboratory, comprising:
a compressed air supply device for supplying compressed air;
a surge tank connected to the compressed air supply device through a first air supply duct, the surge tank being configured to pre-store compressed air; and
the sheet making machine is connected with the pressure stabilizing tank through a second gas supply pipeline;
wherein the first gas supply duct is configured to open prior to the second gas supply duct.
In some embodiments, the copying system for the laboratory comprises a pressure gauge, wherein the pressure gauge is arranged in the pressure stabilizing tank and used for detecting the air pressure in the pressure stabilizing tank.
In some embodiments, the sheet making system for the laboratory comprises a safety valve, wherein the safety valve is arranged in the pressure stabilizing tank and is configured to be opened when the gas pressure value in the pressure stabilizing tank is larger than a set value.
In some embodiments, the sheet making system for the laboratory comprises a pressure relief valve, wherein the pressure relief valve is arranged at the lower part of the surge tank and is configured to be opened when the surge tank stops working.
In some embodiments, the copy system for the laboratory comprises a first switch valve, wherein the first switch valve is arranged on the first air supply pipeline and is configured to control the connection and disconnection of the first air supply pipeline.
In some embodiments, the copy system for the laboratory comprises a second switch valve, wherein the second switch valve is arranged on the second air supply pipeline and is configured to control the on-off of the second air supply pipeline.
In some embodiments, the sheet making machine includes a sheet forming mechanism, and the second air supply duct is connected to the bottom of the sheet forming mechanism and is used for introducing compressed air into the pulp in the sheet forming mechanism.
In some embodiments, the sheet making system for the laboratory further comprises a pressure sensor, wherein the pressure sensor is arranged at the joint of the second gas supply pipeline and the bottom of the sheet forming mechanism and used for detecting the gas pressure introduced into the sheet forming mechanism.
Some embodiments of the present invention provide a method of operating the above-described sheet making system for a laboratory, comprising:
s1: opening a first air supply pipeline, and pre-storing compressed air provided by a compressed air providing device in a pressure stabilizing tank;
s2: after the air pressure in the pressure stabilizing tank is stabilized, opening a second air supply pipeline; and
s3: after the experiment is finished, the first air supply pipeline is closed first, and then the second air supply pipeline is closed.
In some embodiments, step S4 is further included after step S3: and opening a pressure release valve at the bottom of the pressure stabilizing tank, and discharging residual compressed air in the pressure stabilizing tank.
Based on the technical scheme, the invention at least has the following beneficial effects:
in some embodiments, the film making system for the laboratory comprises a surge tank, when the film making machine needs gas to stir, a first air supply pipeline is firstly opened, compressed air is prestored through the surge tank, and after the air pressure in the surge tank is stable, a second air supply pipeline is opened to provide the compressed air with stable pressure for the film making machine, so that a stirring function is realized, and the problem that the film making system cannot work normally due to insufficient air pressure supplied by a pipeline is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic illustration of a sheet making system for a laboratory provided in accordance with some embodiments of the present invention.
The reference numbers in the drawings illustrate the following:
1-a surge tank; 11-a base;
2-sheet making machine; 21-a sheet forming mechanism; 22-a drying mechanism; 23-a control panel;
3-a first gas supply duct; 4-a second gas supply duct; 5-a pressure gauge; 6-safety valve; 7-a pressure relief valve; 8-a first on-off valve; 9-second switch valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.
As shown in fig. 1, some embodiments provide a sheet system for a laboratory, which includes a compressed air supply device, a surge tank 1, and a sheet machine 2.
The compressed air supply device is used for supplying compressed air. Optionally, the compressed air providing means comprises an air compressor.
The surge tank 1 is connected to a compressed air supply device through a first air supply duct 3, and the surge tank 1 is configured to prestore compressed air.
The sheet making machine 2 is connected with the pressure stabilizing tank 1 through a second air supply pipeline 4.
Wherein the first air supply duct 3 is configured to open prior to the second air supply duct 4.
Because compressed air in the laboratory is mostly pipeline centralized supply, has the condition that many equipment moved simultaneously, and the air supply line internal diameter that is connected to equipment is less, can't satisfy the air supply volume that the machine needs of copying in the unit interval. When the sheet making machine uses the gas stirring function, the phenomenon of instantaneous insufficient air pressure can occur. When the instantaneous air pressure is lower than 400kpa, the sheet making machine starts a protection program and enters a shutdown state, so that the work is interrupted, and the work efficiency and the consistency of sample preparation are seriously influenced; and frequent start-stop can also influence the life of sheet-making machine.
The inventor finds that the problem of system shutdown caused by insufficient instantaneous air pressure in the using process of the sheet making machine can be avoided by adding the surge tank 1 to pre-collect the compressed air. The method has the characteristics of simple device structure, convenience in installation, small change on equipment and air supply facilities, capability of providing continuous and stable compressed air of more than 400kpa, strong universality and the like.
In some embodiments, when the sheet making machine 2 needs gas to perform stirring work, the first air supply pipeline 3 is firstly opened, compressed air is prestored through the surge tank 1, and after the air pressure in the surge tank 1 is stable, the second air supply pipeline 4 is opened to provide the compressed air with stable pressure for the sheet making machine 2, so that a stirring function is realized, and the problem that the sheet making system cannot work normally due to insufficient pressure of the compressed air supplied by a pipeline is solved.
In some embodiments, the sheet taking system for the laboratory comprises a pressure gauge 5, the pressure gauge 5 is arranged in the surge tank 1 and is used for detecting the air pressure in the surge tank 1, and after the air pressure in the surge tank 1 is stabilized, the second air supply pipeline 4 is opened to provide compressed air with stable pressure for the sheet taking machine 2.
In some embodiments, the copy system for the laboratory comprises a safety valve 6, wherein the safety valve 6 is arranged in the surge tank 1 and is configured to be opened when the pressure value of gas in the surge tank 1 is greater than a set value, so as to limit pressure and release pressure to play a safety protection role.
In some embodiments, the sheet making system for a laboratory includes a relief valve 7, and the relief valve 7 is provided at a lower portion of the surge tank 1 and configured to open when the surge tank 1 stops operating. The pressure relief valve 7 is used for emergency pressure relief and discharging residual compressed air in the surge tank 1 after the equipment is used.
In some embodiments, the copy system for a laboratory comprises a first switch valve 8, the first switch valve 8 is arranged on the first air supply pipeline 3 and is configured to control the on-off of the first air supply pipeline 3.
Alternatively, the first on-off valve 8 is provided at the air inlet of the surge tank 1.
Alternatively, the first switching valve 8 is a rotary switching valve.
In some embodiments, the copy system for the laboratory comprises a second switch valve 9, and the second switch valve 9 is arranged on the second air supply pipeline 4 and is configured to control the on-off of the second air supply pipeline 4.
Alternatively, the second on-off valve 9 is provided at the air outlet of the surge tank 1.
Alternatively, the second on-off valve 9 is a rotary on-off valve.
Alternatively, the surge tank 1 is a pressure-bearing tank body having a volume of not less than 5L.
In some embodiments, the surge tank 1 is provided with a pressure gauge 5, a safety valve 6 and a pressure relief valve 7, an air inlet of the surge tank 1 is provided with a first switching valve 8, the first switching valve 8 is connected with a first air supply duct 3, and the first air supply duct 3 is used for guiding the compressed air supplied by the compressed air supply device into the surge tank 1. And a second switch valve 9 is arranged at an air outlet of the pressure stabilizing tank 1, the second switch valve 9 is connected with a second air supply pipeline 4, and the second air supply pipeline 4 is used for introducing compressed air with stable pressure into the sheet making machine 2 and stirring slurry in the sheet making machine 2.
In some embodiments, the surge tank 1 includes a base 11.
In some embodiments, the sheet making machine 2 includes a sheet forming mechanism 21, and the second air supply duct 4 is connected to the bottom of the sheet forming mechanism 21 and is used for introducing compressed air into the slurry in the sheet forming mechanism 21 to achieve the purpose of stirring the slurry.
In some embodiments, the sheet making system for the laboratory includes a pressure sensor disposed at the junction of the second air supply duct 4 and the bottom of the sheet forming mechanism 21, the pressure sensor being configured to detect the pressure of the compressed air introduced into the sheet forming mechanism 21.
In the process of forming paper, a large amount of compressed air is injected into the slurry from the periphery of the bottom of the paper forming mechanism 21, a large amount of bubbles are formed in the slurry, and therefore the stirring purpose is achieved, in order to ensure that the distribution of formed paper fibers tends to be uniform and stable, the stirring time is generally required to be about 5 seconds, and the required air pressure is over 400 kpa.
In some embodiments, sheet machine 2 further includes a drying section 22, where drying section 22 is disposed downstream of sheet forming mechanism 21 for drying sheets formed by sheet forming mechanism 21.
In some embodiments, sheeter 2 further comprises a control panel 23.
Some embodiments provide a method of operating the above-described sheet system for a laboratory, comprising:
s1: opening a first air supply pipeline 3, and pre-storing compressed air provided by a compressed air providing device in the pressure stabilizing tank 1;
s2: after the air pressure in the pressure stabilizing tank 1 is stabilized, opening a second air supply pipeline 4; and
s3: after the experiment is finished, the first air supply pipeline 3 is closed first, and then the second air supply pipeline 4 is closed.
In some embodiments, step S4 is further included after step S3: and opening a pressure release valve 7 at the bottom of the surge tank 1 to discharge the residual compressed air in the surge tank 1.
In some embodiments, a method of operating a sheet system for a laboratory, comprising the steps of:
1) before the machine 2 is started, the first switch valve 8 is opened firstly, compressed air provided by the compressed air providing device is led into the pressure stabilizing tank 1 through the first air supply pipeline 3, the pressure stabilizing tank 1 collects the compressed air in advance, and when the pressure gauge 5 arranged on the pressure stabilizing tank 1 displays that the air pressure value in the pressure stabilizing tank 1 is stable, the machine is started according to a normal program within 30 seconds.
2) After the experiment, at first close first ooff valve 8, first air supply line 3 disconnection, then shut down according to normal procedure, slowly open relief valve 7 at last, discharge the remaining compressed air in surge tank 1, then close relief valve 7.
Through comparison and verification, before the method is used, the shutdown times of the system are 40 times within 50 sample periods; after using this method, the number of system shutdowns was 0 for 100 sample cycles.
To sum up, the sheet making system for the laboratory provided by the embodiment of the disclosure can effectively solve the problem of frequent shutdown of the sheet making system due to insufficient instantaneous air pressure, greatly improves the working efficiency of experimenters, and is beneficial to the integrity and consistency of the experimental process.
In the description of the present invention, it should be understood that the terms "first", "second", "third", etc. are used to define the components, and are used only for the convenience of distinguishing the components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present invention.
Furthermore, the technical features of one embodiment may be combined with one or more other embodiments advantageously without explicit negatives.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (10)
1. A sheet making system for a laboratory, comprising:
a compressed air supply device for supplying compressed air;
a surge tank (1) connected to the compressed air supply device through a first air supply duct (3), the surge tank (1) being configured to pre-store compressed air; and
the sheet making machine (2) is connected with the pressure stabilizing tank (1) through a second gas supply pipeline (4);
wherein the first air supply duct (3) is configured to open prior to the second air supply duct (4).
2. A copying system for a laboratory according to claim 1, characterized by comprising a pressure gauge (5), wherein the pressure gauge (5) is arranged in the surge tank (1) and is used for detecting the air pressure in the surge tank (1).
3. A copying system for a laboratory according to claim 1, characterized by comprising a safety valve (6), wherein the safety valve (6) is arranged in the surge tank (1) and is configured to open when the gas pressure value in the surge tank (1) is greater than a set value.
4. A sheet making system for a laboratory according to claim 1, characterized by comprising a pressure relief valve (7), wherein said pressure relief valve (7) is provided at a lower portion of said surge tank (1) and is configured to be opened when said surge tank (1) stops working.
5. A copying system for a laboratory according to claim 1, characterized by comprising a first on-off valve (8), wherein said first on-off valve (8) is provided in said first air supply duct (3) and is configured to control the on-off of said first air supply duct (3).
6. A copying system for a laboratory according to claim 1, characterized by comprising a second on-off valve (9), wherein said second on-off valve (9) is provided in said second gas supply duct (4) and is configured to control the on-off of said second gas supply duct (4).
7. A sheet making system for a laboratory according to claim 1, characterized in that said sheet making machine (2) comprises a sheet forming mechanism (21), and said second air supply duct (4) is connected to the bottom of said sheet forming mechanism (21) for introducing compressed air into the slurry in said sheet forming mechanism (21).
8. A sheet making system for a laboratory according to claim 7, further comprising a pressure sensor, said pressure sensor being disposed at the junction of said second gas supply duct (4) and the bottom of said sheet forming mechanism (21) for detecting the pressure of gas introduced into said sheet forming mechanism (21).
9. A method of operating a sheet system for a laboratory according to any one of claims 1 to 8, comprising:
s1: opening a first air supply pipeline (3), and pre-storing compressed air provided by a compressed air providing device in a pressure stabilizing tank (1);
s2: after the air pressure in the pressure stabilizing tank (1) is stabilized, opening a second air supply pipeline (4); and
s3: after the experiment is finished, the first air supply pipeline (3) is closed first, and then the second air supply pipeline (4) is closed.
10. The method of operating a sheet system for a laboratory as set forth in claim 9, further comprising a step S4 after the step S3: and opening a pressure release valve (7) at the bottom of the surge tank (1) to discharge residual compressed air in the surge tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010385223.XA CN111501390A (en) | 2020-05-09 | 2020-05-09 | Copying system for laboratory and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010385223.XA CN111501390A (en) | 2020-05-09 | 2020-05-09 | Copying system for laboratory and operation method thereof |
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| CN111501390A true CN111501390A (en) | 2020-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010385223.XA Pending CN111501390A (en) | 2020-05-09 | 2020-05-09 | Copying system for laboratory and operation method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU40878A1 (en) * | 1932-05-12 | 1934-12-31 | Оскар Арендт | Apparatus for separating compressed air from a paper pulp of a hollow body from a mold |
| CN102174989A (en) * | 2010-12-17 | 2011-09-07 | 内蒙古伊利实业集团股份有限公司 | Pressure stabilizing device and pressure stabilizing method for pneumatic equipment |
| CN202441528U (en) * | 2012-02-14 | 2012-09-19 | 潍柴动力股份有限公司 | Pressure regulator for pneumatic starter |
| CN203513241U (en) * | 2013-10-12 | 2014-04-02 | 浙江久而久化学有限公司 | Full-automatic air pressure stabilizing device |
| CN203737201U (en) * | 2014-03-18 | 2014-07-30 | 重庆立致和节能科技有限公司 | Energy-saving air supply system for autoclave |
| CN104294699A (en) * | 2014-09-15 | 2015-01-21 | 陕西科技大学 | Laboratory paper sheet making machine |
| CN106968125A (en) * | 2017-04-10 | 2017-07-21 | 北京航空航天大学 | A kind of carbon fiber surface mat handsheet former and method |
-
2020
- 2020-05-09 CN CN202010385223.XA patent/CN111501390A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU40878A1 (en) * | 1932-05-12 | 1934-12-31 | Оскар Арендт | Apparatus for separating compressed air from a paper pulp of a hollow body from a mold |
| CN102174989A (en) * | 2010-12-17 | 2011-09-07 | 内蒙古伊利实业集团股份有限公司 | Pressure stabilizing device and pressure stabilizing method for pneumatic equipment |
| CN202441528U (en) * | 2012-02-14 | 2012-09-19 | 潍柴动力股份有限公司 | Pressure regulator for pneumatic starter |
| CN203513241U (en) * | 2013-10-12 | 2014-04-02 | 浙江久而久化学有限公司 | Full-automatic air pressure stabilizing device |
| CN203737201U (en) * | 2014-03-18 | 2014-07-30 | 重庆立致和节能科技有限公司 | Energy-saving air supply system for autoclave |
| CN104294699A (en) * | 2014-09-15 | 2015-01-21 | 陕西科技大学 | Laboratory paper sheet making machine |
| CN106968125A (en) * | 2017-04-10 | 2017-07-21 | 北京航空航天大学 | A kind of carbon fiber surface mat handsheet former and method |
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Application publication date: 20200807 |