CN213113171U - Low-pressure gaseous carbon dioxide foaming hard polyurethane foam pouring equipment - Google Patents
Low-pressure gaseous carbon dioxide foaming hard polyurethane foam pouring equipment Download PDFInfo
- Publication number
- CN213113171U CN213113171U CN202022031817.9U CN202022031817U CN213113171U CN 213113171 U CN213113171 U CN 213113171U CN 202022031817 U CN202022031817 U CN 202022031817U CN 213113171 U CN213113171 U CN 213113171U
- Authority
- CN
- China
- Prior art keywords
- carbon dioxide
- isocyanate
- gaseous carbon
- polyurethane foam
- static mixer
- 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.)
- Active
Links
Images
Landscapes
- Polyurethanes Or Polyureas (AREA)
Abstract
The utility model provides a low pressure gaseous carbon dioxide foaming rigid polyurethane foam pouring equipment, its concrete pouring method is: step 1, putting polyether polyol, a catalyst surfactant and a chemical foaming agent which does not contain gaseous carbon dioxide into processing equipment for physical blending to form a polyether mixture, and conveying the polyether mixture into a polyol storage tank of a polyurethane high-pressure foaming machine through a feeding pump and a conveying pipe to form combined polyether; the utility model discloses a low pressure gaseous carbon dioxide foaming rigid polyurethane foam carries low pressure gaseous carbon dioxide to static mixer in with invariable proportion after through the measurement, and the entering isocyanate mixes the jar in advance. The polymeric MDI is proportionally fed into an isocyanate premixing tank through a static mixer. At normal temperature and normal pressure, the polymeric MDI and the low-pressure gaseous carbon dioxide entering the isocyanate premixing tank are recycled to the static mixer and then recycled to the isocyanate premixing tank through the static mixer until being fully mixed.
Description
Technical Field
The utility model relates to a polyurethane technical field especially relates to a low pressure gaseous carbon dioxide foaming rigid polyurethane foam pouring equipment.
Background
With the continuous development of the foam plastic industry and the continuous improvement of the international environmental protection standard, developed countries in the world have adopted liquid carbon dioxide as a foaming agent of polyurethane foam plastic, which is a necessary trend of the industry development. As carbon dioxide is a three-atom environment-friendly substance, the price is low, the source is wide, and the ODP value is zero, so that the carbon dioxide is valued by people.
Accordingly, it would be desirable to provide a technique for preparing polyurethane foams using carbon dioxide as a blowing agent in place of HCFC-141 b. However, liquid carbon dioxide has a big characteristic: when the pressure drops suddenly, part of the liquid absorbs heat and is gasified, and the phenomenon of air resistance occurs. Another part of the liquid releases heat to condense into a solid, and the formation of dry ice, which may occur in a storage tank, a pipeline, a pump, a filter or any other part of the system, may hinder the flow of the liquid from affecting the operation of the pump and causing accidents. In order to avoid the phenomenon, the development and the use of the foaming technology are urgently needed, the operation is convenient, the mass production can be realized, and the foaming technology of the gaseous carbon dioxide at normal temperature and normal pressure, which has reliability and safety, is provided for the actual production, and has important significance.
SUMMERY OF THE UTILITY MODEL
According to the technical problem, the utility model provides a low pressure gaseous carbon dioxide foaming rigid polyurethane foam pouring equipment comprises isocyanate storage tank, isocyanate measuring pump, combined polyether storage tank, isocyanate premixing jar, combined polyether measuring pump, polymerization MDI storage bucket, the polymerization MDI storage bucket passes through conveyer pipe, material loading pump and isocyanate premixing jar and connects, the isocyanate premixing jar passes through static mixer and carbon dioxide steel bottle and connects, isocyanate premixing jar internally mounted has the stirring rake, stirring rake and agitator motor are connected, static mixer and measuring pump are connected, install pressure reducer, check valve and flowmeter on static mixer and the carbon dioxide steel bottle connecting tube, the measuring pump passes through change-over valve and isocyanate storage tank and connects, the isocyanate storage tank passes filter, and the pipeline passes, The metering pump is connected with the casting machine mixing head, and the casting machine mixing head penetrates through the filter, the metering pump and the polyol storage tank through pipelines to be connected.
The isocyanate storage tank and the polyol storage tank are respectively connected with a heat exchanger.
And the casting machine is arranged on the electric hoist tractor in a mixing way.
The backflow testing unit is arranged on a component backflow pipeline in front of the polyol storage tank and the isocyanate storage tank, and the metering pump consists of an electric motor of a flange mounting seat, a coupling, a pump connecting piece and an axial plunger metering pump provided with a safety valve. The output quantity is adjusted by a hand wheel and a dial arranged on a metering pump shell within the range of 10-100%, and the metering pump shell comprises an exhaust valve arranged on the upper part and a drainage plug screw arranged at the bottom of the pump shell. The pressure gauge displays the pressure at the suction end and the output end. The output end of the isocyanate storage tank and the output end of the combined polyether storage tank are connected with a mixing head of a casting machine through respective conveying pipes; the metering pump and the flow meter are driven and controlled by the same conveying mechanism, the conveying mechanism comprises a driving cylinder, a three-position five-way reversing valve, the driving cylinder is provided with the three-position five-way reversing valve arranged on the outer side surface of the frame, a piston is arranged in the driving cylinder, the piston divides the inner space of the cylinder body of the driving cylinder into an upper cylinder and a lower cylinder, a driving rod is arranged on the piston, an isocyanate metering pump and a combined polyether metering pump are fixedly arranged on the left side and the right side of a fixed plate, a first piston rod is arranged in the isocyanate metering pump, a second piston rod is arranged in the combined polyether metering pump, a transverse plate is arranged above the fixed plate, two ends of the transverse plate are respectively connected with the first piston rod and the second piston rod, the middle part of the transverse plate is connected with the driving rod of, the second connecting rod is provided with a sliding block.
The pouring method of the low-pressure gaseous carbon dioxide foaming hard polyurethane foam comprises the following specific pouring methods:
The heat-insulating pipe working pipe is prepared by mixing combined polyether, low-pressure gaseous carbon dioxide and polymeric MDI, the mass ratio of isocyanate prepared by mixing the combined polyether, the low-pressure gaseous carbon dioxide and the polymeric MDI is 1:1, the foaming agent comprises a chemical foaming agent and a low-pressure gaseous carbon dioxide foaming agent, the mass part of the low-pressure gaseous carbon dioxide foaming agent in the isocyanate is 3-5, the mass part of the chemical foaming agent in the combined polyether is 1-2, and the chemical foaming agent is water.
The catalyst comprises an organic amine catalyst and an organic metal catalyst for conventional polyurethane, wherein the organic amine catalyst accounts for 2-4 parts by mass of the combined polyether, the organic metal catalyst accounts for 0.1-1.5 parts by mass of the combined polyether, the surfactant is an organic silicon surfactant for special rigid polyurethane foam, and the surfactant accounts for 1.5-2 parts by mass of the combined polyether.
The polyether polyol in the combined polyether comprises 100 parts by mass of polyether polyol, wherein the hydroxyl value of the polyether polyol is 300-350 mgKOH/g, the acid value mgKOH/g is less than or equal to 0.15, and the viscosity (25 ℃) is mpa.s 700-900.
The low pressure is normal temperature and normal pressure.
The initiation time in the step 1-3, namely the reaction time of the combined polyether polyol and the isocyanate containing carbon dioxide is 15-38 seconds, and the curing time, namely the reaction stop time of the combined polyether polyol and the isocyanate containing carbon dioxide is 70-238 seconds.
The utility model has the advantages that: the utility model discloses a polyurethane foam is produced in isocyanate that contains carbon dioxide and combination polyether polyol reaction. After certain curing time, obtain low pressure gaseous carbon dioxide foaming rigid polyurethane foam, the utility model discloses a low pressure gaseous carbon dioxide mixes the foaming preparation with other environment-friendly foaming agents to low viscous formula system has been adopted, has made the utility model discloses a rigid polyurethane foam possesses good intensity, thermal insulation performance and dimensional stability, in addition the utility model discloses still provide the preparation method of this rigid polyurethane foam simultaneously, this method mixes gaseous carbon dioxide and polymerization MDI through static mixer, and then prepares out this rigid polyurethane foam, and preparation method is simple safe and reliable, is suitable for actual popularization and application. The utility model discloses can improve polyurethane's bubble body structure, the polyurethane foam structure of formation is even, has improved polyurethane foam's physical properties. The utility model provides a pair of low-pressure gaseous carbon dioxide foaming rigid polyurethane foam pouring and a preparation method thereof. The polyurethane foaming agent has the advantages of simple process, easy operation, high foaming efficiency, no toxicity and the like, is a low-cost foaming agent with wide application prospect, improves the comprehensive performance of polyurethane foam, and is beneficial to popularization.
The utility model discloses a low pressure gaseous carbon dioxide foaming rigid polyurethane foam carries low pressure gaseous carbon dioxide to static mixer in with invariable proportion after through the measurement, and the entering isocyanate mixes the jar in advance. The polymeric MDI is proportionally fed into an isocyanate premixing tank through a static mixer. At normal temperature and normal pressure, the polymeric MDI and the low-pressure gaseous carbon dioxide entering the isocyanate premixing tank are recycled to the static mixer and then recycled to the isocyanate premixing tank through the static mixer until being fully mixed. The ideal thermal insulation pipe and pipe fitting poured by foaming rigid polyurethane foam are obtained.
The utility model discloses a zero ODP's environment-friendly foamer, friendly to the environment, the requirement of complying with the international environmental convention. The production environment of the utility model has high tolerance, can meet the production environment, and has wide application range; the preparation method of the rigid polyurethane foam has low requirements on equipment and is simple and reliable.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the gas carbon dioxide premixing device of the present invention.
Fig. 3 is a schematic view of the specific structure of the temperature-resistant support frame of the present invention.
As shown in the figure: the device comprises a conversion valve 1, a metering pump 2, a filter 3, a static mixer 4, a carbon dioxide steel cylinder 5, a flow meter 6, a one-way valve 7, a feeding pump 8, a pressure reducer 9, a polymeric MDI material barrel 10, an isocyanate premixing tank 11, a heat exchanger 12, an isocyanate material storage tank 13, a polyol material storage tank 14, a stirring motor 15, a cantilever rotating arm 16, a casting machine mixing head 17, an outer protecting pipe 18, a casting hole 19 and a working pipe 20.
Detailed Description
The present invention will be further described with reference to the following specific embodiments. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
The preparation method of the rigid polyurethane foam comprises the following steps: a low-pressure gaseous carbon dioxide foaming hard polyurethane foam casting heat preservation pipe and pipe fittings are prepared by mixing combined polyether, low-pressure gaseous carbon dioxide and polymeric MDI, wherein the combined polyether comprises polyalcohol, catalyst, surfactant and chemical foaming agent water (without gaseous carbon dioxide). The mass ratio of the combined polyether to the isocyanate prepared by mixing the low-pressure gaseous carbon dioxide and the polymeric MDI is 1: 1. The blowing agent includes a chemical blowing agent and a low pressure gaseous carbon dioxide blowing agent. The low-pressure gaseous carbon dioxide foaming agent is 3-5 parts by weight in isocyanate. The mass portion of the chemical foaming agent in the combined polyether is 1-2, and the chemical foaming agent is water. The catalyst comprises an organic amine catalyst and an organic metal catalyst for conventional polyurethane, and the organic amine catalyst accounts for 2-4 parts by mass of the combined polyether. The organic metal catalyst in the combined polyether accounts for 0.1-1.5 parts by weight. The surfactant is an organic silicon surfactant for special hard polyurethane foam, and the surfactant in the combined polyether accounts for 1.5-2 parts by weight. The polyether polyol comprises 100 parts by weight of polyether polyol, wherein the hydroxyl value of the polyether polyol is 300-350 mgKOH/g, the acid value mgKOH/g is less than or equal to 0.15, and the viscosity (at 25 ℃) is mpa.s 700-900.
Firstly, the isocyanate enters a static mixer through a high-performance metering pump, and simultaneously gaseous carbon dioxide enters the static mixer according to a certain proportion after being metered through a mass flow meter, so that the purpose of adding the carbon dioxide into the isocyanate is fulfilled. And the mixed isocyanate enters the premixing tank again for circulation. After carbon dioxide is added into isocyanate according to a preset proportion, a control valve of the premix tank is opened, and the isocyanate mixed with the carbon dioxide is added into a charging bucket of a common high-pressure casting machine. The isocyanate containing carbon dioxide is then reacted with the syntactic polyether polyol to form the polyurethane foam. The control system for premixing the carbon dioxide is mainly used for controlling the time of the whole premixing process and the flow of the isocyanate and the carbon dioxide. The related parameters are accurately controlled through a set program.
Example 2
The preparation method of the rigid polyurethane foam comprises the following steps:
1) polyether polyol, a catalyst, a surfactant and chemical foaming agent water (without gaseous carbon dioxide) are physically mixed to form combined polyether;
2) the mixed combined polyether is conveyed into a polyol storage tank of a polyurethane high-pressure foaming machine through a charging pump and a conveying pipe, and meanwhile, the polymeric MDI is conveyed into an isocyanate premixing tank through the charging pump and the conveying pipe;
3) conveying gaseous carbon dioxide into a static mixer in a constant proportion after decompression metering at normal temperature and normal pressure, and fully mixing the gaseous carbon dioxide with the polymeric MDI entering the static mixer from the isocyanate premixing tank;
4) the polymeric MDI is proportionally fed into an isocyanate premixing tank through a static mixer. At normal temperature, the polymeric MDI and the low-pressure gaseous carbon dioxide entering the isocyanate premixing tank are recycled to the static mixer and then recycled to the isocyanate premixing tank through the static mixer to be fully mixed;
5) opening a valve of an isocyanate premixing tank, and conveying the uniformly mixed polymeric MDI and low-pressure gaseous carbon dioxide to an isocyanate storage tank of a high-pressure casting machine;
6) after the pouring proportion is measured, at normal temperature and normal pressure, a high-pressure pouring machine sends two raw materials, namely liquid combined polyether polyol and isocyanate containing gaseous carbon dioxide, to a mixing head through two rotary axial plunger metering pumps, when the mixing head is opened under the hydraulic action, the working pipe is poured, the working pipe is placed on a support during pouring, an outer protective pipe is wrapped on the outer side of the working pipe, a pouring opening is formed in the outer protective pipe, during pouring, the mixing head injects the raw materials into a mixing chamber on the lower side of the pouring opening at high pressure and high flow rate, the raw materials collide with each other, the purpose of mixing is achieved through kinetic energy conversion, and the raw materials flow out of the mixing head and enter a die cavity (a cavity between the working pipe of the heat preservation pipe and the outer protective pipe of high-density polyethylene;
7) after a certain curing time, the low-pressure gaseous carbon dioxide foaming rigid polyurethane foam poured heat preservation pipe and pipe fittings are obtained.
The initiation time in the step is 20-38 seconds, and the curing time is 70-238 seconds; the low-pressure gaseous carbon dioxide is adopted to foam the hard polyurethane foam, and the ideal heat-insulating pipe and pipe fitting cast by the hard polyurethane foam are prepared.
The heat preservation pipe has the specific structure that the heat preservation pipe comprises a medium conveying pipe, an inorganic heat insulation layer, a heat-resistant support frame with a flow channel, a fastening stainless steel band, an organic heat insulation layer, an inner corona layer and an outer anticorrosive layer, wherein the inorganic heat insulation layer is fixedly wound on the peripheral surface of the medium conveying pipe, the heat-resistant support frame with the flow channel is tightly wound on the inorganic heat insulation layer of the medium conveying pipe through the fastening stainless steel band, the heat-resistant support frame with the flow channel comprises a support frame body, the flow channel and a fixing part, the top and the bottom of the support frame body are arc-shaped, the arc at the top is matched with the inner diameter of the outer anticorrosive layer, the arc at the bottom is matched with the outer diameter of the inorganic heat insulation layer, the support frame body is provided with the flow channel, the cross section of the flow channel is isosceles trapezoid, the fixing part is arranged at the bottom, the equal node of the pipe fitting adopts the structure.
Example 3
The specific method for producing the heat-insulating pipe by utilizing the application comprises the following steps:
the method comprises the steps of firstly carrying out appearance detection on a medium conveying pipe, hoisting the detected medium conveying pipe on a winding machine by using a crane to wind an inorganic heat-insulating layer, then installing and clamping a temperature-resistant support frame with a flow channel, winding the inorganic heat-insulating layer on the outer diameter of the medium conveying pipe by using a fastening stainless steel band corresponding to the outer diameter of the temperature-resistant support frame with the flow channel, and then pressing an advancing button switch of a pipe penetrating machine to push the medium conveying pipe fastened with the temperature-resistant support frame with the flow channel into an outer anticorrosive layer. According to the pipe diameter of the medium conveying pipe, corresponding flange plugs are installed on the parallel propelling device of the foaming platform; placing the medium conveying pipe with the outer anticorrosive layer on the foaming platform by using a crane, and starting a forward switch of a parallel propulsion device of the foaming platform before pouring the organic heat insulation layer raw material into the medium conveying pipe until the flanges plug and propel two ends of the medium conveying pipe. Drilling a hole in the middle of the outer anticorrosive layer, and pouring the organic heat-insulating layer by using a high-pressure pouring machine prepared with the raw material of the organic heat-insulating layer; after the pouring is finished for a few minutes, a retreating switch of the foaming platform is started, the flanges at the two ends of the medium conveying pipe are removed for plugging, then the poured medium conveying pipe is hung in a row and is hung in a stacking area, and the whole production process is finished.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention. For example, the present invention uses a casting foaming method to prepare rigid polyurethane foam, and those skilled in the art can derive rigid polyurethane foam prepared by other foaming methods (such as spraying, plate material, etc.) on the basis of the casting foaming system without creative labor, and these derived rigid polyurethane foam and the preparation method thereof should be regarded as the protection scope of the present invention.
Claims (2)
1. The utility model provides a low pressure gaseous carbon dioxide foaming rigid polyurethane foam pouring equipment, its characterized in that mixes jar, combined polyether measuring pump, combined polyether storing tank, isocyanate by isocyanate storing tank, isocyanate measuring pump, polymerization MDI storage bucket and constitutes in advance, the polymerization MDI storage bucket passes through conveyer pipe, material loading pump and isocyanate and mixes jar connection in advance, the isocyanate mixes jar in advance and passes through static mixer and carbon dioxide steel bottle connection, isocyanate mixes jar internally mounted in advance and has the stirring rake, stirring rake and agitator motor are connected, static mixer and measuring pump are connected, install pressure reducer, check valve and flowmeter on static mixer and the carbon dioxide steel bottle connecting tube, the measuring pump passes filter, measuring pump and the casting machine mixing head through the pipeline and connects, the pouring machine mixing head passes through the filter, the metering pump and the polyol storage tank through the pipeline to be connected.
2. The apparatus for casting low-pressure gaseous carbon dioxide-blown rigid polyurethane foam according to claim 1, wherein the mixer head of the casting machine is mounted on a tractor of an electric block, and the tractor of the electric block is mounted on a balancer-type cantilever frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022031817.9U CN213113171U (en) | 2020-09-16 | 2020-09-16 | Low-pressure gaseous carbon dioxide foaming hard polyurethane foam pouring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022031817.9U CN213113171U (en) | 2020-09-16 | 2020-09-16 | Low-pressure gaseous carbon dioxide foaming hard polyurethane foam pouring equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213113171U true CN213113171U (en) | 2021-05-04 |
Family
ID=75664275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022031817.9U Active CN213113171U (en) | 2020-09-16 | 2020-09-16 | Low-pressure gaseous carbon dioxide foaming hard polyurethane foam pouring equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213113171U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112011081A (en) * | 2020-09-16 | 2020-12-01 | 天津军星管业集团有限公司 | Method and equipment for pouring low-pressure gaseous carbon dioxide foaming rigid polyurethane foam |
| CN113719670A (en) * | 2021-08-31 | 2021-11-30 | 黑龙江贞财管道有限公司 | ESEPI prefabricated heat-preservation direct-buried heat-resistant high-density polyethylene low-temperature heat supply composite pipe |
-
2020
- 2020-09-16 CN CN202022031817.9U patent/CN213113171U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112011081A (en) * | 2020-09-16 | 2020-12-01 | 天津军星管业集团有限公司 | Method and equipment for pouring low-pressure gaseous carbon dioxide foaming rigid polyurethane foam |
| CN113719670A (en) * | 2021-08-31 | 2021-11-30 | 黑龙江贞财管道有限公司 | ESEPI prefabricated heat-preservation direct-buried heat-resistant high-density polyethylene low-temperature heat supply composite pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213113171U (en) | Low-pressure gaseous carbon dioxide foaming hard polyurethane foam pouring equipment | |
| CN112011081A (en) | Method and equipment for pouring low-pressure gaseous carbon dioxide foaming rigid polyurethane foam | |
| AU730488B2 (en) | Mobile cement additive and concrete admixture manufacturing process and system | |
| CN104227846B (en) | A kind of foam slurry device for formulating and application thereof | |
| CA1147117A (en) | Nucleation control adapted for reaction injection molded slurries | |
| CN112240173B (en) | Foam circulation-based oil-gas well sand washing method, defoaming liquid for oil-gas well sand washing and foaming liquid | |
| CN101607807B (en) | Polyurethane cement composite grouting material | |
| US4107075A (en) | Apparatus for spraying plastic foam | |
| CN111517721A (en) | Corrosion-resistant reinforced concrete pipe and preparation method thereof | |
| CN204532375U (en) | A kind of new concrete wet-spraying machine | |
| JPS6221928B2 (en) | ||
| CN113719262A (en) | Self-foaming clean fracturing device and method based on carbon dioxide phase change | |
| CN116731470A (en) | Resin sand-fixing agent and its preparing process | |
| CN103510910A (en) | System and method for strength maintenance of high-temperature resistant and high-pressure resistant foam cement paste | |
| CN109897619A (en) | A kind of Solid Free foam well workover liquid system and preparation method thereof strengthened based on gel | |
| CN210705875U (en) | Mixing device for preparing polydicyclopentadiene from single component | |
| CN203697256U (en) | Double-foaming foam concrete equipment | |
| CN215742918U (en) | Skid-mounted ultrahigh-pressure foam rubber generating device for yield increase of oil and gas well | |
| CN106397725A (en) | Heat preservation tube material prepared by recycling waste hard polyurethane foaming plastic, heat preservation tube and manufacturing method | |
| CN112282790A (en) | Slurry stirring self-injection equipment | |
| CN217401080U (en) | Pumping equipment | |
| CN201223658Y (en) | Measuring type device for mixing infused foam in proportion | |
| RU63430U1 (en) | WELL CEMENTING UNIT | |
| CN212505724U (en) | Decompression formula stirred tank of preparation foam pitch | |
| CN215876945U (en) | Biodiesel production is with novel high-efficient agitating unit of methyl alcohol and oil mixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |