CN105679468B - The insulator of internal filled polyurethane and filling polyurethane method - Google Patents
The insulator of internal filled polyurethane and filling polyurethane method Download PDFInfo
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- CN105679468B CN105679468B CN201610180398.0A CN201610180398A CN105679468B CN 105679468 B CN105679468 B CN 105679468B CN 201610180398 A CN201610180398 A CN 201610180398A CN 105679468 B CN105679468 B CN 105679468B
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- insulation tube
- polyurethane
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/14—Supporting insulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
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- Polyurethanes Or Polyureas (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention provides a kind of filling polyurethane methods, include the following steps：By insulation tube and horizontal plane into 10 ° of 60 ° of placements, and two flanges are set respectively at the both ends of the insulation tube；One discharge port is set in the upper semi-circle of upper flanges, the axis of the discharge port is set relative to the eccentric axis of the insulation tube；One feed inlet is set in the upper semi-circle of lower end flanges, the axis of the feed inlet is set relative to the eccentric axis of the insulation tube；Urethane raw is injected from the feed inlet, fills the insulation tube from the bottom to top；Close the feed inlet and the discharge port.The present invention also provides the insulators as made from above-mentioned filling polyurethane method.
Description
Technical field
The invention belongs to insulator technology fields, are related to insulator and the filling polyurethane side of a kind of internal filled polyurethane
Method.
Background technology
The high-voltage strut insulator that usual open air uses generally uses true procelain support insulator, solid strut compound absolutely
Edge, hollow inflatable formula post composite insulator and porcelain core post composite insulator.Wherein, true procelain support insulator weight weight,
Transport installation is inconvenient, and fracture of root and pollution flashover accident easily occur in the process of running；Solid strut composite insulator
Using glass-epoxy leading-drawing rod as its skeletal support and interior insulation, since glass fiber epoxy resin material has
Toughness, the flexible deformation under stress are larger, it is impossible to meet the requirement of isolated switchgear；Hollow inflatable formula pillar is compound absolutely
Edge does column using hollow insulation tube, and internal filling gas insulate, since gas filler easily leaks, so must
Monitoring device must be filled to monitor the variation of interiors of products gas, but also there are some potential safety problemss；Porcelain core composite post is exhausted
Its manufacturing method of edge is that the full skirt that silicon rubber synthetic material makes is bonded on porcelain core, since porcelain core adds without precision machinery
Phenomena such as work is made, and the bumps presented on surface microscopic be easy to cause silicon rubber umbrella skirt bonding loosely, generation bubble, influences to produce
The electric property of product and service life.
At present, common solid dielectric insulation is mainly polyurethane, and generally use injects completion method.But conventional injection
Completion method can usually so that polyurethane internal foam is uneven, foam stability is poor, and mutually be merged between internal another typical material
The defects of larger bubble can be formed in gum-injecting port, these defects, which rise to steep oneself-meeting, significantly affects the performance of insulator.
Invention content
In view of the shortcomings that above-mentioned prior art, the purpose of the present invention is to provide a kind of fill method of polyurethane, the party
Method is simple and practicable, with the fill method enable to that the interior insulator of filling generates polyurethane foam is small, foam is fine and smooth and
Defect bubble is few, and the polyurethane foam filling of interior insulator high-pressure side is closely knit.
Another object of the present invention is to provide a kind of insulator of internal filled polyurethane.
In order to reach aforementioned goal of the invention, the present invention provides a kind of filling polyurethane method, includes the following steps：
By insulation tube and horizontal plane into 10 ° of -60 ° of placements, and two flanges are set respectively at the both ends of the insulation tube；
In the upper semi-circle of upper flanges, one discharge port is set, the axis of the discharge port relative to the insulation tube axis
Eccentric setting；
In the upper semi-circle of lower end flanges, one feed inlet is set, the axis of the feed inlet relative to the insulation tube axis
Eccentric setting；
Urethane raw is injected from the feed inlet, fills the insulation tube from the bottom to top；
Close the feed inlet and the discharge port.
In above-mentioned filling polyurethane method, insulation tube is angled with horizontal plane, can effectively prevent defect bubble
Generation.
In above-mentioned filling polyurethane method, the foundation that the urethane raw fills insulation tube is the urethane raw
It is overflowed from the discharge port.
In above-mentioned filling polyurethane method, the urethane raw, which fills to further include after insulation tube, first closes the discharging
Mouthful, the step of turning off the feed inlet, to discharge gas remaining in above-mentioned insulation tube.
In above-mentioned filling polyurethane method, make the raw material of polyurethane from the low side of insulation tube to high-end flowing, and start
Reaction, it is consistent that the direction of motion and the raw material of raw material start the direction reacted, it is ensured that in foaming process, gas in insulation tube by
Lower and upper discharge, the high-pressure side polyurethane foam filling for making feed inlet are closely knit.
In above-mentioned filling polyurethane method, it is preferable that the injection rate of the urethane raw is 1.8kg/s-
2.5kg/s, injection pressure are 130-140bar, and implantation temperature is 10-30 DEG C.
In above-mentioned filling polyurethane method, the injection rate of the urethane raw can also be less than 1.8kg/s, still
Too low injection rate can influence production efficiency, so as to increase production cost；If likewise, excessively high, this occur turbulent flow or
Sputtering generates defect blistering.
In above-mentioned filling polyurethane method, it is preferable that the feed inlet end is provided with a damping hose, the poly- ammonia
Ester raw material is injected by the damping hose in the insulation tube.
In above-mentioned filling polyurethane method, a diameter of 20-50mm of the damping hose.
In above-mentioned filling polyurethane method, the input terminal bore of the damping hose and the injector port used
Match, the length of the separator tube can be decided according to the actual requirements.
In above-mentioned filling polyurethane method, raw material is injected from damping hose, can make the urethane raw squeezed by
Original splash shape becomes flow shape and flows into the insulation tube, so as to reduce being involved in for air, and then reduces the production of bubble
It is raw, make polyurethane foam finer and smoother.
In above-mentioned filling polyurethane method, it is preferable that the insulation tube is horizontal by 30 ° of -60 ° of placements.
In above-mentioned filling polyurethane method, it is preferable that the discharge port and/or feed inlet are ball valve.
In above-mentioned filling polyurethane method, when feed inlet sets ball valve, damping hose is arranged on feed inlet and ball valve
Between or ball valve be arranged between feed inlet and damping hose.
In above-mentioned filling polyurethane method, the ball valve includes metal ball-valve or ball valve made of plastic.
In above-mentioned filling polyurethane method, it is preferable that the flange is solid flange or the flange is hollow method
Blue and sealing plate sub-assembly.
In above-mentioned filling polyurethane method, during sub-assembly of the flange for hollow flange and sealing plate, the sealing plate with
Clip pad has the poromeric material of 2-3mm between hollow flange；The poromeric material includes sponge.
Poromeric material is padded between sealing plate and hollow flange, the purpose is to be used to be vented.
In above-mentioned filling polyurethane method, the ball valve be mounted on the sealing plate upper semi-circle, and with the insulation tube
It is connected, the axis of the ball valve is set relative to the eccentric axis of the insulation tube.
The mounting ball valve on sealing plate, the effect of ball valve are to will be involved in the air of interior insulator during filling polyurethane
It excludes, while is prevented polyurethane foam excessive with valve seal after filling process, production can be reduced using ball valve made of plastic
Cost.
In above-mentioned filling polyurethane method, when the flange is solid flange, the discharge port can be gas vent, described
Gas vent can be closed by a bar shaped sealing plate, be can be used for the air for excluding to generate, can also be played sealing process.
In above-mentioned filling polyurethane method, the flange is the flange for being threaded hole, and ball valve is equipped on threaded hole,
The axis of the ball valve is set relative to the eccentric axis of the insulation tube.
In above-mentioned filling polyurethane method, it is preferable that it is former that the urethane raw includes black material, white material and epoxy resin
Material, the dosage of the epoxy source material are the 3%-15% of the urethane raw gross mass, the black material and the matter expected in vain
Measure ratio 1：1.
In above-mentioned filling polyurethane method, the white material and epoxy resin are first mixed, then again with the black material
Mixing carries out polyurethane foam.
In above-mentioned filling polyurethane method, it is preferable that the epoxy source material is pure epoxy resin or epoxy resin
With the composition of curing agent, the mass ratio of the epoxy resin and curing agent is 100：(70-120).
In above-mentioned filling polyurethane method, it is preferable that the epoxy resin is water-resistant type epoxy resin.
In above-mentioned filling polyurethane method, general water-resistant type epoxy resin can be used in this programme, both
The water resistance of finished product can be enhanced, and the insulation performance of finished product can be enhanced.
In above-mentioned filling polyurethane method, the black material of the urethane raw and white material can be that this field is routinely matched
Side；Using epoxy resin in the urethane raw, polyurethane foam breakdown strength can be increased, so as to increase the insulation of insulator
Performance.
The present invention also provides a kind of insulators of filled polyurethane internal as made from the filling of above-mentioned filling polyurethane method.
With the continuous improvement of scientific and technological level, people propose higher requirement to power station electrical equipment.Power station is used
Composite post insulator not only require higher insulation performance and various electric properties, will also can bear operation in often by
It is electronic to the gravity and tension of conducting wire, wind-force, icing weight, insulator dead weight, conductor vibration, equipment operation mechanical force, short circuit
Power, earthquake and the effect of other mechanical forces.The insulator of internal filled polyurethane provided by the invention not only has good machine
Tool performance, and its partial discharge quantity is small, excellent electric properties.
The present invention protrusion effect be：
Filling polyurethane method provided by the invention, it is simple and practicable, in the polyurethane defect bubble that interior insulator generates
Quantity is few, and polyurethane foam is small, and foam is fine and smooth, also, the interior insulator high-pressure side polyurethane foam filling after filling is closely knit.
Description of the drawings
Fig. 1 is the apparatus structure schematic diagram of 2 filling polyurethane method of embodiment；
Fig. 2 is the cross-sectional anatomy figure of the insulator of internal filled polyurethane in embodiment 2.
Drawing reference numeral explanation：
1 support column, 2 feed inlet, 3 discharge port, 4 insulation tube, 5 polyurethane foam
Specific embodiment
In order to which technical characteristic, purpose and the advantageous effect to the present invention are more clearly understood, now to the skill of the present invention
Art scheme carry out it is described further below, but it is not intended that the present invention can practical range restriction.
Embodiment 1
The present embodiment provides a kind of filling polyurethane method, the insulation tube specification that this method uses isIts inner wall has been polished, and both ends are sealed using hollow flange and sealing plate, and
One ball valve is installed respectively, two ball valves are connected with the insulation tube, and the axis of ball valve on the upper semi-circle of the sealing plate at both ends
It is set relative to the eccentric axis of insulation tube；
The insulation tube and horizontal plane are about placed in 10.5 ° of angles, the ball valve of lower end is feed inlet ball valve, the ball at high-end place
Valve is discharge port ball valve, and a hose is communicated on feed inlet ball valve as damping hose, the input terminal of the hose and high pressure
The pipette tips matching of bubble machine, clip pad has the sponge of one layer of 2-3mm thickness between sealing plate and hollow flange；
The input terminal of hose is sleeved in the pipette tips of high pressure foaming machine, opens feed inlet ball valve and discharge port ball valve, it will be poly-
The black material of foaming raw material of urethane expected in vain with 139bar, foaming raw material and water-resistant type epoxy source material with the pressure of 130bar through soft
Pipe is injected in insulation tube simultaneously, and the total flow of the foaming raw material of the polyurethane is 1.8kg/s, and material feeding temperature is 20 DEG C, polyurethane
Air during foaming overflows respectively from feed inlet ball valve, discharge port ball valve and sponge gap location, by 33s black material material feeding and
Polyurethane foam fills up the insulation tube after the white material material feeding of 33s, removes foaming machine gun head, is then shut off inlet port and outlet port
Ball valve, that is, complete the filling of polyurethane, and obtain the insulator of internal filled polyurethane；
Wherein, which is isocyanates, and white material is combination polyalcohol (conventional formulation), and black material is with the mass ratio expected in vain
1:1, water-resistant type epoxy resin is the 5% of the foaming raw material gross mass of the polyurethane.
The fill method of the present embodiment makes the raw material of polyurethane from the low side of insulation tube to high-end flowing, and starts to react,
The direction that the direction of motion of raw material and raw material start reaction is consistent, it is ensured that in foaming process, gas in insulation tube by lower and
Upper discharge, the polyurethane foam filling for making feed inlet high-pressure side are closely knit.
In addition, injecting raw material from hose, the urethane raw squeezed into can be made to become flow shape by original splash shape
It flows into the insulation tube, so as to reduce being involved in for air, and then reduces the generation of defect bubble, make polyurethane foam more
It is fine and smooth.
The present embodiment be also respectively adopted in the injection flow velocity section of 1.8kg/s-2.5kg/s randomly select it is different in flow rate to same
Kind insulation tube is filled polyurethane foam；The results show that dissecting the insulator of different material flow velocity filling, find
1.8kg/s-2.5kg/s the polyurethane foam filling effect in flow velocity section is similar.
Embodiment 2
The present embodiment provides a kind of filling polyurethane method, method equipment therefor is as shown in Figure 1, the insulation that this method uses
The specification of pipe 4 isIts inner wall has been polished, and both ends are carried out close using solid flange
Envelope；
One end of the insulation tube is padded with support column 1, it is made about to be placed with horizontal plane in 30.7 ° of angles, the reality of lower end
The upper semi-circle of heart flange is threaded hole as feed inlet 2, and ball valve made of plastic is equipped on threaded hole, and is communicated with a hose and makees
For damping hose, the input terminal of the hose is matched with the pipette tips of high pressure foaming machine, the ball valve made of plastic be feed inlet ball valve, insulation tube
The solid flange upper semi-circle at high-end place is threaded hole as gas vent, and ball valve made of plastic is equipped on threaded hole, which makees
For discharge port 3, wherein, the center of circle of the inlet port and outlet port is set relative to the eccentric axis of insulation tube；The present embodiment is adopted
With ball valve made of plastic, production cost is reduced；
The input terminal of hose is sleeved in the pipette tips of high pressure foaming machine, opens feed inlet ball valve and discharge port ball valve, then
The black material of the foaming raw material of polyurethane is expected and epoxy resin and its curing agent in vain with 139bar, foaming raw material, with the pressure of 130bar
Power is injected through hose in insulation tube 4 simultaneously, until foaming raw material is overflowed from discharge port；The quality of the epoxy resin and its curing agent
Than being 100：80, the total flow of the foaming raw material of the polyurethane is 1.8kg/s, and material feeding temperature is 20 DEG C, during polyurethane foam
Air overflows respectively from feed inlet ball valve, discharge port 3, the polyurethane foam after the black material material feeding of 33s and the white material material feeding of 33s
5 fill up the insulation tube 4, remove foaming machine gun head, are then shut off feed inlet ball valve and discharge port ball valve, that is, complete polyurethane
Filling, and obtain the insulator of internal filled polyurethane；
Wherein, which is isocyanates, and white material is Sucrose polyethers, ammonia ether, alcohol ether, Siloxane-Oxyalkylene Copolymers, antioxygen
The mixture (conventional ratio mixing) of agent, amines catalyst and foaming agent, black material and the mass ratio expected in vain are 1:1, epoxy resin
3% of foaming raw material gross mass for the polyurethane.
The fill method of the present embodiment makes the raw material of polyurethane from the low side of insulation tube to high-end flowing, and starts to react,
The direction that the direction of motion of raw material and raw material start reaction is consistent, it is ensured that in foaming process, gas in insulation tube by lower and
Upper discharge, the polyurethane foam filling for making feed inlet high-pressure side are closely knit.In addition, injecting raw material from hose, it can make what is squeezed into
Urethane raw becomes flow shape by original splash shape and flows into the insulation tube, so as to reduce being involved in for air, and then
The generation of bubble is reduced, makes polyurethane foam finer and smoother, gained insulator fine with glass fibre reinforced plastic insulating inside pipe wall bonding interface
The polyurethane of inside filling is as shown in Figure 2.
The present embodiment by 4 padded different height of insulation tube, makes it with horizontal plane respectively into 10 °, 30 ° also with support column 1,
60 ° of angles, and filling polyurethane is carried out to insulation tube of the same race with same procedure, filling effect is as shown in table 1：
Table 1
| Angle of inclination | Filling effect |
| 10° | Interlude filling is enriched, and discharge port has longer stomata |
| 30° | Filling is enriched, and feed inlet stomata is less |
| 60° | Filling is enriched, and feed inlet stomata is less |
It can be seen that when insulation tube is horizontal by 30 ° of -60 ° of angles, the filling effect of polyurethane is preferable, and above-mentioned fills out
It is more convenient to fill method operation；From filling quality and execute-in-place, 30 ° of angles are more suitable for producing in batches.
By experimental verification, the interior insulator of inside filled polyurethane that the filling polyurethane method of the present embodiment obtains
The filling of high-pressure side polyurethane foam is closely knit, and polyurethane bubble is small, and defect bubble quantity is few, and foam is fine and smooth, and it is modern right to disclosure satisfy that
The insulating properties and electrical performance demands of insulator.
Comparative example 1
This comparative example provides a kind of filling polyurethane method, and the specification for the insulation tube that this method uses isIts inner wall has been polished, and both ends are sealed using hollow flange and sealing plate, and
Ball valve made of plastic is separately installed on the upper semi-circle of the sealing plate at both ends, ball valve is connected with the insulation tube, and the axis of ball valve is opposite
It is set in the eccentric axis of insulation tube；
One end of the insulation tube is padded, it is made about to be placed with horizontal plane in 7.6 ° of angles, and the ball valve at high-end place is feed inlet ball
Valve, the ball valve of lower end is discharge port ball valve；A hose is communicated on feed inlet ball valve as damping hose, the hose it is defeated
Enter end to match with the pipette tips of high pressure foaming machine, clip pad has the sponge of one layer of 2-3mm thickness between the sealing plate and hollow flange；
The input terminal of hose is sleeved in the pipette tips of high pressure foaming machine, opens feed inlet ball valve and discharge port ball valve, it will be poly-
The black material of foaming raw material of urethane expected in vain with 139bar, foaming raw material and epoxy source material with the pressure of 130bar and meanwhile injection it is exhausted
Edge pipe, the total flow of the foaming raw material of the polyurethane are 1.8kg/s, and material feeding temperature is 20 DEG C, the gas point during polyurethane foam
It does not overflow from the ball valve of feed inlet, the ball valve of discharge port and sponge gap location, until polyurethane foam fills up the insulation tube, removes
Except foaming machine gun head, the ball valve of inlet port and outlet port is then shut off, that is, completes the filling of polyurethane, and it is poly- to obtain internal filling
The insulator of urethane；
Wherein, which is isocyanates, and white material is combination polyalcohol (conventional formulation), and black material is with the mass ratio expected in vain
1:1, epoxy resin is the 5% of the foaming raw material gross mass of the polyurethane.
The fill method of this comparative example makes the raw material of polyurethane be flowed from the high-end of insulation tube to low side, and start to react,
In foaming process, gas is from top to bottom discharged in insulation tube.To the feed inlet of the insulator, intermediate ends and lower end progress are close
Degree measures, and measurement result is shown, the density of the insulator feed inlet is 133.54kg/m3, the density of intermediate ends is 140.46kg/
m3, the density of lower end is 144.75kg/m3.The insulator is dissected, it is found that the polyurethane abscess of the interior insulator is equal
Even property is good, and foam exquisiteness forms a strip defect bubble, and the bubble ratio insulation of feed inlet end without air pocket, but in feed inlet end
The bubble of sub- lower end is big, this is because caused by failing in time to drain air during polyurethane foam.
Comparative example 2
This comparative example provides a kind of filling polyurethane method, and the specification for the insulation tube that this method uses isIts inner wall has been polished, and both ends are sealed using hollow flange and sealing plate, and two
Ball valve made of plastic is separately installed on the upper semi-circle of the sealing plate at end, ball valve is connected with the insulation tube, and the axis of ball valve relative to
The eccentric axis setting of insulation tube；
One end of the insulation tube is padded to make it with horizontal plane about in 12.5 ° of angles, and the ball valve of lower end is feed inlet ball valve, high
Ball valve at end is discharge port ball valve；A hose is communicated on feed inlet ball valve as damping hose, the input terminal of the hose
It is matched with the pipette tips of high pressure foaming machine, clip pad has the sponge of one layer of 2-3mm thickness between the sealing plate and hollow flange；
This comparative example also provides the filling polyurethane method of above-mentioned fill method, includes the following steps：
The input terminal of hose is sleeved in the pipette tips of high pressure foaming machine, opens feed inlet ball valve and discharge port ball valve, it will be poly-
The black material of foaming raw material of urethane is with 139bar, and foamed material in vain noted simultaneously with the pressure of 130bar through hose by material and epoxy source material
Enter in insulation tube, the black material and the total flow expected in vain are 1kg/s, and material feeding temperature is 20 DEG C, gas difference during polyurethane foam
The ball valve and sponge gap location of ball valve, discharge port from feed inlet overflow, until polyurethane foam fills up the insulation tube, remove
Foam machine gun head, is then shut off the ball valve of inlet port and outlet port, that is, completes the filling of polyurethane, and obtains the internal poly- ammonia of filling
The insulator of ester；
Wherein, which is isocyanates, and white material is combination polyalcohol (conventional formulation), and black material is with the mass ratio expected in vain
1:1, epoxy resin is the 5% of the foaming raw material gross mass of the polyurethane.
Will the insulator place a night after dissect, it is found that the polyurethane foam of the interior insulator and insulation tube it
Between there are gap, while insulation tube upper end exhaust position foam surface have intensive minute bubbles, this is because the note of raw material
Enter rate it is relatively low caused by, after the mixing of black and white material, by low side feed inlet dnockout, after raw material flows to upper end, while dnockout, stream
A part of raw material to upper end has begun to chemically react, and the raw material with newly throwing into forms convection current, due to the stability of foam
It is poor, thus, minute bubbles easily form larger bubble after meeting with minute bubbles, are generated at insulation tube upper end exhaust position intensive
Minute bubbles.
This comparative example has also carried out parallel experiment, and method and step is identical, and total injection rate of 1kg/s only is become 3kg/
The injection rate of s.And it will be dissected after obtained insulator one night of placement, it is found that the polyurethane foam of the interior insulator
There are gap between insulation tube, the defects of insulation tube upper end exhaust position, blisters more, larger, and polyurethane foam filling is not close
It is real, inhomogenous exquisiteness, it is expected to be as caused by sputtering turbulent flow.
Comparative example 3
This comparative example provides a kind of filling polyurethane method, and the specification for the insulation tube that this method uses isIts inner wall has been polished, and both ends are sealed using solid flange；
It is made about to be placed in 14 ° of angles with horizontal plane by one end of the insulation tube is padded, the solid flange of lower end carries spiral shell
Pit is equipped with ball valve made of plastic as feed inlet on threaded hole, which is feed inlet ball valve, the reality at the high-end place of insulation tube
The discharge port for being threaded hole is provided on heart flange, discharge port ball valve is installed on threaded hole, wherein, the feed inlet and go out
The center of circle of material mouth is set relative to the eccentric axis of insulation tube；
The pipette tips of new grand high pressure foaming machine are inserted into the input port of feed inlet ball valve, open feed inlet ball valve and discharge port
Ball valve；Then by the black material of the foamed material of polyurethane expected in vain with 120bar, foaming raw material and epoxy resin and its curing agent with
The pressure of 130bar is injected in insulation tube simultaneously, until foaming raw material is overflowed from discharge port；The epoxy resin and its curing agent
Mass ratio is 100：80, the total flow of the foaming raw material of the polyurethane is 1.8kg/s, and material feeding temperature is 20 DEG C, polyurethane foam
When air respectively from feed inlet ball valve, gas vent overflow, polyurethane foam fills up the insulation tube after 25s material feedings, removes
Except foaming machine gun head, discharge port ball valve is then shut off, that is, completes the filling of polyurethane, and obtains the insulation of internal filled polyurethane
Son.
Wherein, which is isocyanates, and white material is Sucrose polyethers, ammonia ether, alcohol ether, Siloxane-Oxyalkylene Copolymers, antioxygen
The mixture (conventional ratio mixing) of agent, amines catalyst and foaming agent, black material and the mass ratio expected in vain are 1:1, epoxy resin
3% of foaming raw material gross mass for the polyurethane.
It is dissected after the insulator is placed a night, it is found that in the polyurethane foam and insulation tube of the interior insulator
Although wall contact site occurs more intensive without great drawback bubble, defect bubble negligible amounts, polyurethane foam inside
Bubble, and bubble diameter is larger, this is because during the injection of raw material, urethane raw is directly injected from feed inlet, injects pressure
It is larger, although raw material mixed effect is preferable, air can be involved in raw material, therefore can form more defect gas by when material feeding
Bubble.
With reference to the comparison of above-described embodiment and comparative example, filling polyurethane method provided by the invention is simple and practicable, exhausted
The polyurethane defect bubble quantity generated inside edge is few, and polyurethane foam is small, and foam is fine and smooth, also, the insulator after filling
The polyurethane foam filling of internal high pressure end is closely knit, can meet high requirement of the people to insulator.
Claims (7)
1. a kind of filling polyurethane method, includes the following steps：
By insulation tube and horizontal plane into 30.7 ° of -60 ° of placements, and two flanges are set respectively at the both ends of the insulation tube；
In the upper semi-circle of upper flanges, one discharge port is set, the axis of the discharge port relative to the insulation tube eccentric axis
Setting；
In the upper semi-circle of lower end flanges, one feed inlet is set, the axis of the feed inlet relative to the insulation tube eccentric axis
Setting；
Urethane raw is injected from the feed inlet, fills the insulation tube from the bottom to top；
Close the feed inlet and the discharge port；
The flange is hollow flange and the sub-assembly of sealing plate, and clip pad has breathing freely for 2-3mm between the sealing plate and hollow flange
Property material；
The feed inlet end is provided with a damping hose, and the urethane raw is injected into the insulation tube by the damping hose
In.
2. filling polyurethane method according to claim 1, it is characterised in that：The injection rate of the urethane raw is
1.8kg/s-2.5kg/s, injection pressure are 130-140bar, and implantation temperature is 10-30 DEG C.
3. filling polyurethane method according to claim 1 or 2, it is characterised in that：The discharge port and/or feed inlet are set
It is equipped with ball valve.
4. filling polyurethane method according to claim 1 or 2, it is characterised in that：The urethane raw include black material,
White material and epoxy source material, the dosage of the epoxy source material are the 3%-15% of the urethane raw gross mass, institute
State black material and the mass ratio 1 expected in vain：1.
5. filling polyurethane method according to claim 4, it is characterised in that：The epoxy source material is pure epoxy tree
The mass ratio of the composition of fat or epoxy resin and curing agent, the epoxy resin and curing agent is 100：(70-120).
6. filling polyurethane method according to claim 5, it is characterised in that：The epoxy resin is water-resistant type asphalt mixtures modified by epoxy resin
Fat.
7. a kind of insulator of internal filled polyurethane, it is characterised in that：The insulator passes through any one of claim 1-6 institutes
The filling polyurethane method filling stated is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610180398.0A CN105679468B (en) | 2016-03-25 | 2016-03-25 | The insulator of internal filled polyurethane and filling polyurethane method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610180398.0A CN105679468B (en) | 2016-03-25 | 2016-03-25 | The insulator of internal filled polyurethane and filling polyurethane method |
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| Publication Number | Publication Date |
|---|---|
| CN105679468A CN105679468A (en) | 2016-06-15 |
| CN105679468B true CN105679468B (en) | 2018-07-06 |
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| CN105679468A (en) | 2016-06-15 |
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