CN211813397U - Nitrogen sealing system for MDI (diphenylmethane diisocyanate) sizing - Google Patents
Nitrogen sealing system for MDI (diphenylmethane diisocyanate) sizing Download PDFInfo
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- CN211813397U CN211813397U CN201922269579.2U CN201922269579U CN211813397U CN 211813397 U CN211813397 U CN 211813397U CN 201922269579 U CN201922269579 U CN 201922269579U CN 211813397 U CN211813397 U CN 211813397U
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Abstract
The utility model discloses a nitrogen seals system for MDI glueing relates to MDI glueing system field. The nitrogen sealing system is connected among a nitrogen making machine, a tank car and an MDI glue storage tank, and comprises a plurality of sections of pipelines and devices connected on the pipelines or among the pipelines. The utility model discloses a device for inputting nitrogen gas in a nitrogen making machine into an MDI glue storage tank by decompression, the nitrogen gas discharged by the nitrogen making machine is reduced to proper pressure by a decompression valve, one part enters a tank car inlet to discharge air in a pipeline, the other part enters the MDI glue storage tank to exhaust the air in the tank, if the pressure of the pipeline is overlarge, the nitrogen gas enters an expiratory valve and an inspiratory valve to adjust the pressure, and other impurities are absorbed by an air dryer; the utility model adopts the welded ball valve, which can simplify the process; furthermore, the utility model discloses set up gaseous exit into in the side of system, can make the internal pressure holding balance of storage glue jar for MDI glues the circulation more smoothly.
Description
Technical Field
The utility model relates to a MDI glueing system field especially relates to a nitrogen seal system for MDI glueing.
Background
MDI glue, namely MDI ecological adhesive, is one of MDI downstream products and is used for manufacturing various plates. MDI is the most important raw material for producing polyurethane, and a small amount of MDI is applied to other aspects except polyurethane. The MDI ecological binder is used for preparing the plate, so that the excessive development of forest resources is solved, the formaldehyde-free wood floor is beneficial to the home health of people, and the wood floor is expected to be developed into a product with the most market development potential and industrialization prospect.
The storage device is glued to MDI commonly used is mostly the packing barrel storage tank alive, and it is extremely inconvenient with barreled canning when the MDI use amount is big, can not the continuous feed, and the packing can not used repeatedly usually, causes certain influence to the environment, and storage conditions such as sealed and temperature are hardly guaranteed in the barreled storage, cause MDI performance variation easily. Furthermore, MDI glue is toxic and can be solidified when meeting water, and must be closed in the storage process, and in the gluing process, the MDI glue is prevented from contacting with air as much as possible, and is prevented from being solidified and deteriorated when contacting with water vapor. Therefore, there is a need to design a system to isolate MDI glues from exposure to air or volatilization into air.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the shortcoming that exists among the prior art, realize airtight and isolated air that MDI glued, and the nitrogen that provides a is used for MDI glueing seals the system.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a nitrogen sealing system for MDI glue application is connected among a nitrogen making machine, a tank car and an MDI glue storage tank, and is characterized by comprising a pipeline, a manual ball valve, a pressure reducing valve, a manual welding ball valve, a three-way joint, an air pipe joint, a pressure gauge, a manual flange ball valve, a pressure sensor, a four-way joint, an expiratory valve, an inspiratory valve, a pressure regulator, a flange sheet and an air dryer;
the outlet end of the nitrogen making machine is sequentially connected with a first manual ball valve and a first pressure reducing valve and then is connected to one end of a first manual welding ball valve through a section of pipeline, and the other end of the first manual welding ball valve is connected to the first end of a three-way joint through a section of pipeline; a second manual ball valve is connected to a pipeline between the first pressure reducing valve and the first manual welding ball valve, a second pressure reducing valve and a pressure gauge are connected to a pipeline between the first manual welding ball valve and the tee joint, and the second manual ball valve and the second pressure reducing valve are connected together through a gas pipe joint; the pipeline between the first manual welding ball valve and the three-way joint is also connected to the inlet of the tank car through a joint;
the second end of the three-way joint is connected to one end of a manual flange ball valve through a section of pipeline, and the other end of the manual flange ball valve is connected to the top of the MDI glue storage tank; the pressure sensor is connected to a pipeline between the three-way joint and the manual flange ball valve;
the third end of the three-way joint is connected to the first end of a first four-way joint through a section of pipeline, the second end of the first four-way joint is connected to the first end of a second four-way joint through a second manual welding ball valve, and the second end of the second four-way joint is connected to an air dryer through a section of pipeline; the third end of the first four-way joint is connected to the third end of the second four-way joint through an exhalation valve, a pipeline and a flange plate in sequence; the fourth end of the first four-way joint is connected to the fourth end of the second four-way joint through an air suction valve, a pipeline and a flange plate in sequence; and a pressure regulator is arranged above the expiratory valve.
Preferably, the nitrogen sealing system is connected with a gas inlet of the nitrogen making machine and a gas outlet of the air dryer and is arranged on the side surface of the nitrogen sealing system.
Preferably, the exhalation valve comprises a gas inlet end and a gas outlet end, the gas inlet end of the exhalation valve is connected with the third end of the first four-way joint, and the gas outlet end of the exhalation valve is connected with the third end of the second four-way joint through a pipeline and a flange plate.
Preferably, the suction valve comprises a gas inlet end and a gas outlet end, the gas outlet end of the suction valve is connected with the fourth end of the first four-way joint, and the gas inlet end of the suction valve is connected with the fourth end of the second four-way joint through a pipeline and a flange sheet.
Preferably, the air dryer is in bidirectional communication with the second end of the second four-way joint.
The utility model has the advantages that: 1. the utility model discloses a device for inputting nitrogen gas pressure reduction in a nitrogen making machine into MDI glue storage tank. The nitrogen gas discharged by the nitrogen making machine is reduced to proper pressure through a pressure reducing valve, one part of the nitrogen gas enters the tank car inlet to discharge air in the pipeline, and the other part of the nitrogen gas enters the MDI glue storage tank to exhaust the air in the tank, so that the sealing in the MDI glue applying process is realized. 2. The utility model realizes the pressure regulation in the MDI gluing process, if the pressure of the pipeline is overlarge, the nitrogen can enter the expiratory valve and the inspiratory valve to regulate the pressure; the rest impurities can be absorbed by an air dryer; 3. the welded ball valve is adopted, so that the process can be simplified; 4. the gas inlet and outlet are arranged on the side surface of the system, so that the pressure in the rubber storage tank body can be kept balanced, and the MDI rubber can flow more smoothly.
Drawings
Fig. 1 is a schematic structural diagram of a nitrogen sealing system according to the present invention.
Reference numbers in the figures: 1 nitrogen making machine, 2 manual ball valves, 3 pressure reducing valves, 4 manual welding ball valves, 5 three-way joints, 6 manual ball valves, 7 air pipe joints, 8 pressure reducing valves, 9 pressure gauges, 10 tank car inlets, 11 manual flange ball valves, 12MDI glue storage tanks, 13 pressure sensors, 14 four-way joints, 15 exhalation valves, 16 air suction valves, 17 pressure regulators, 18 flange sheets, 19 manual welding ball valves, 20 four-way joints and 21 air dryers.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Please refer to fig. 1, the utility model relates to a nitrogen sealing system for MDI glueing, it is the one set of pipe-line system who connects between nitrogen generator, tank wagon, MDI glue storage tank, its constitution includes the multistage pipeline and connects on these pipelines or the device between the pipeline, these devices include manual ball valve 2, relief pressure valve 3, manual welding ball valve 4, three way connection 5, manual ball valve 6, air pipe connection 7, relief pressure valve 8, manometer 9, tank wagon entry 10, manual flange ball valve 11, pressure sensor 13, four way connection 14, expiratory valve 15, inspiratory valve 16, pressure regulator 17, flange piece 18, manual welding ball valve 19, four way connection 20 and air dryer 21.
Referring to fig. 1, the connection method of the present invention is as follows: the outlet end of the nitrogen making machine 1 is sequentially connected with a manual ball valve 2 and a pressure reducing valve 3 and then is connected with one end of a manual welding ball valve 4 through a section of pipeline, and the other end of the manual welding ball valve 4 is connected with the first end of a three-way joint 5 through a section of pipeline; a manual ball valve 6 is connected on a pipeline between the pressure reducing valve 3 and the manual welding ball valve 4, a pressure reducing valve 8 and a pressure gauge 9 are connected on a pipeline between the manual welding ball valve 4 and the three-way joint 5, and the manual ball valve 6 and the pressure reducing valve 8 are connected together through an air pipe joint 7; the pipeline between the manual welding ball valve 4 and the three-way joint 5 is also connected to the tank wagon inlet 10 through a joint; the second end of the three-way joint 5 is connected with one end of a manual flange ball valve 11 through a section of pipeline, and the other end of the manual flange ball valve 11 is connected to the top of an MDI glue storage tank 12; the pressure sensor 13 is connected on the pipeline between the three-way joint 5 and the manual flange ball valve 11; the third end of the three-way joint 5 is connected with the first end of the four-way joint 14 after passing through a section of pipeline, the second end of the four-way joint 14 is connected with the first end of the four-way joint 20 after passing through the manual welding ball valve 19, and the second end of the four-way joint 20 is connected with the air dryer 21 after passing through a section of pipeline; the third end of the four-way joint 14 is connected to the third end of the four-way joint 20 through the expiratory valve 15 and the flange plate 18 in sequence; the fourth end of the four-way joint 14 is connected to the fourth end of the four-way joint 20 through the air suction valve 16 and the flange plate 18 in sequence; a pressure regulator 17 is arranged above the expiratory valve 15, and the regulated pressure is 0.03 MPa.
The working principle of the utility model is as follows: the nitrogen sealing system of the utility model is a device for inputting nitrogen gas in the nitrogen making machine 1 into the MDI glue storage tank 12 by decompression. The nitrogen making machine 1 discharges nitrogen gas, the pressure is reduced to proper pressure through the pressure reducing valves 3 and 8, one part of the nitrogen gas enters the tank car inlet 10 to discharge air in the pipeline, and the other part of the nitrogen gas enters the MDI glue storage tank 12 to exhaust the air in the MDI glue storage tank 12. If the pressure in the pipeline is too high, nitrogen will enter the exhalation valve 15 and the inhalation valve 16, and the exhalation valve 15 and the inhalation valve 16 will perform the function of regulating the pressure by exhaling and inhaling one by one. The remaining impurities are absorbed by the air dryer 21. The utility model discloses what ball valve wherein adopted is the welding ball valve, can simplify technology. The utility model discloses with gaseous exit, the gaseous import of system connection nitrogen generator 1 promptly and the gas outlet of system connection air dryer 21 set up respectively to the side at nitrogen sealing system, can make the internal pressure of storage glue jar 12 jars keep balanced like this, make MDI glue the circulation more smooth and easy.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (5)
1. A nitrogen sealing system for MDI glue application is connected among a nitrogen making machine, a tank car and an MDI glue storage tank, and is characterized by comprising a pipeline, a manual ball valve, a pressure reducing valve, a manual welding ball valve, a three-way joint, an air pipe joint, a pressure gauge, a manual flange ball valve, a pressure sensor, a four-way joint, an expiratory valve, an inspiratory valve, a pressure regulator, a flange sheet and an air dryer;
the outlet end of the nitrogen making machine is sequentially connected with a first manual ball valve and a first pressure reducing valve and then is connected to one end of a first manual welding ball valve through a section of pipeline, and the other end of the first manual welding ball valve is connected to the first end of a three-way joint through a section of pipeline; a second manual ball valve is connected to a pipeline between the first pressure reducing valve and the first manual welding ball valve, a second pressure reducing valve and a pressure gauge are connected to a pipeline between the first manual welding ball valve and the tee joint, and the second manual ball valve and the second pressure reducing valve are connected together through a gas pipe joint; the pipeline between the first manual welding ball valve and the three-way joint is also connected to the inlet of the tank car through a joint;
the second end of the three-way joint is connected to one end of a manual flange ball valve through a section of pipeline, and the other end of the manual flange ball valve is connected to the top of the MDI glue storage tank; the pressure sensor is connected to a pipeline between the three-way joint and the manual flange ball valve;
the third end of the three-way joint is connected to the first end of a first four-way joint through a section of pipeline, the second end of the first four-way joint is connected to the first end of a second four-way joint through a second manual welding ball valve, and the second end of the second four-way joint is connected to an air dryer through a section of pipeline; the third end of the first four-way joint is connected to the third end of the second four-way joint through an exhalation valve, a pipeline and a flange plate in sequence; the fourth end of the first four-way joint is connected to the fourth end of the second four-way joint through an air suction valve, a pipeline and a flange plate in sequence; and a pressure regulator is arranged above the expiratory valve.
2. The nitrogen sealing system for MDI sizing according to claim 1, wherein the nitrogen sealing system is connected to a gas inlet of a nitrogen generator and a gas outlet of an air dryer, and is disposed at a side of the nitrogen sealing system.
3. The nitrogen sealing system for MDI sizing according to claim 1, wherein the exhalation valve includes a gas inlet end and a gas outlet end, the gas inlet end of the exhalation valve being connected to the third end of the first four-way joint, the gas outlet end of the exhalation valve being connected to the third end of the second four-way joint by a pipe and a flange plate.
4. The nitrogen sealing system for MDI sizing according to claim 1, wherein the suction valve includes a gas inlet end and a gas outlet end, the gas outlet end of the suction valve being connected to the fourth end of the first four-way joint, the gas inlet end of the suction valve being connected to the fourth end of the second four-way joint by a pipe and a flange plate.
5. The nitrogen sealing system for MDI sizing of claim 1, wherein gas flow between the air dryer and the second end of the second four-way joint is bi-directional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922269579.2U CN211813397U (en) | 2019-12-17 | 2019-12-17 | Nitrogen sealing system for MDI (diphenylmethane diisocyanate) sizing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922269579.2U CN211813397U (en) | 2019-12-17 | 2019-12-17 | Nitrogen sealing system for MDI (diphenylmethane diisocyanate) sizing |
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| CN211813397U true CN211813397U (en) | 2020-10-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109382269A (en) * | 2018-12-29 | 2019-02-26 | 大亚木业（茂名）有限公司 | A kind of formaldehyde-free glue size applicator and its application method |
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2019
- 2019-12-17 CN CN201922269579.2U patent/CN211813397U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109382269A (en) * | 2018-12-29 | 2019-02-26 | 大亚木业（茂名）有限公司 | A kind of formaldehyde-free glue size applicator and its application method |
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