CN103469884A - Double-plastic composite enhanced type inspection well and preparation method thereof - Google Patents
Double-plastic composite enhanced type inspection well and preparation method thereof Download PDFInfo
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- CN103469884A CN103469884A CN2013104692971A CN201310469297A CN103469884A CN 103469884 A CN103469884 A CN 103469884A CN 2013104692971 A CN2013104692971 A CN 2013104692971A CN 201310469297 A CN201310469297 A CN 201310469297A CN 103469884 A CN103469884 A CN 103469884A
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Abstract
Disclosed are a double-plastic composite enhanced type inspection well and a preparation method of the double-plastic composite enhanced type inspection well. At least one spigot-and-socket port communicated with a pipeline is formed in the side walls of a well body, and a well mouth of the inspection well is used for being connected with a well casing. The inspection well is characterized in that the well body, the spigot-and-socket ports and the well mouth are all formed by double-layer plastic composite enhancing material through the rotational moulding technique; the outer layer of the double-layer plastic composite enhancing material is a low-density polyethylene layer, the inner layer of the double-layer plastic composite enhancing material is an epoxy resin layer, short glass fibers are evenly distributed on the junction of the inner layer and the outer layer, and a part of short glass fibers permeate into the interface of the inner layer and the outer layer in a penetrating and inserted mode and are connected with the inner layer and the outer layer in a hot-melting mode. The double-plastic composite enhanced type inspection wells comprise rainwater inspection wells and sewage inspection wells, both the rainwater inspection wells and the sewage inspection wells comprise straight-through wells or tee-joint wells or four-way well or bend wells. The double-plastic composite enhanced type inspection well reduces product cost and also greatly improves product quality.
Description
Technical field
The present invention relates to manhole, particularly a kind of plastic inspection well and preparation method thereof in a kind of gravity drainage, blowdown pipe network.
Background technology
In recent years, plastic inspection well is widely used, the also appearance like the mushrooms after rain thereupon of a large amount of plastic inspection well manufacturing enterprise.Main cause is that China firmly builds section's emphasis and promotes the use of plastic inspection well, places restrictions on brick manhole, effectively controls groundwater resources and pollutes.During from 2007, the whole nation only has 2～3 to produce plastic inspection well enterprise, and have 50 many enterprises to whole nation today of 2013, in these 50 many enterprises, what go up in advance is to adopt Shooting Technique to produce, but the producer of in the recent period upper this project great majority adopt rotational molding technique to produce manhole.
The raw material that rotational molding technique is produced manhole are to adopt the good LLDPE(low density polyethylene (LDPE) of mobility), rotational molding technique is as used the HDPE(high density polyethylene (HDPE)) produce manhole, can't moulding, because the non-constant of the mobility of HDPE.But HDPE carrys out ratio on physical property with LLDPE, no matter be rigidity, elastic mould, or hot strength, HDPE is more much higher than LLDPE.So the wall thickness of the injection moulding well of producing with HDPE is former much thinner than the wall of rotational moulding type well.Adopt rotational molding technique can only carry out moulding with the LDPE of good fluidity again, can only sacrifice raw material, increase wall thickness, with this, exchange intensity for.
Linear low density polyethylene (LLDPE) (Linear Low-Density Polyethylene), english abbreviation is L LDPE.LLDPE structurally is different from general low density polyethylene (LDPE), because there is not long-chain branch.The linearity of LLDPE depends on the different process of manufacture of LLDPE and LDPE.LLDPE usually, under lower temperature and pressure, is closed and generates as butylene, hexene or octene copolymer by ethene and senior a alkene.The LLDPE polymer that polymerization process generates has the molecular weight distribution narrower than general LDPE, has linear structure simultaneously and makes it that different rheological behaviors be arranged.The melt flow characteristics of LLDPE adapts to the requirement of rotational molding technique, particularly uses the film expressing technique, but the high-quality LLDPE product of output.LLDPE be applied to polyethylene all traditional cities often strengthened anti-ly stretch, anti-ly penetrate, the performance of shock resistance and tear-proof makes LLDPE be suitable for doing film.The environmental stress crack resistance of its excellence, low-temperature impact resistance and anti-warpage properties make LLDPE all attractive to tubing, sheet material extrusion molding and the application of all moldings.The up-to-date application of LLDPE is the lining for waste residue landfill and waste liquid pool as mulch film.
Glass fiber reinforced plastic (FRP) also is called GRP, and fiber-reinforced plastic, refer generally to strengthen unsaturated polyester, epoxy resin and phenolic resin as matrix resin with glass fiber.Make the reinforced plastic of reinforcing material with glass fiber or its goods, appellation is glass fiber reinforced plastics, or appellation glass fiber reinforced plastic.Due to used resin kind difference, therefore the title of organic toughened glass, fiber glass epoxy, phenolic fiberglass reinforced plastics is arranged.Light weight is and hard, and non-conductive, mechanical strength is high, recycles few, corrosion-resistant.Can replace steel manufacturing machine part and automobile, ship housing etc.If it is material of main part that fiber glass reinforced plastics inspection well adopts the high-quality glass fiber reinforced plastics composite material, cost of manufacture is high, and in the situation that quality specifications is had relatively high expectations, all need in crushing resistance, intensity, vacuum, ring stiffness, weatherability, switching performance, application life etc. to improve, overall performance is in urgent need to be improved.
Summary of the invention
The purpose of this invention is to provide a kind of pair and mould composite enhanced manhole and preparation method thereof, the plastic inspection well borehole wall that solve the rotational molding technique making is thicker, just can reach the problem that needs intensity; And the problem that solution fiber glass reinforced plastics inspection well cost of manufacture is high, overall performance is lower.
For achieving the above object, the present invention adopts following technical scheme:
A kind of two composite enhanced manhole of moulding, the sidewall of its well body has the bell and spigot of at least one and pipeline connection, its well head is for being connected with well casing, and it is characterized in that: described well body, bell and spigot and well head are made with rotational molding technique by the double-layer plastic composite reinforcing material; The skin of described double-layer plastic composite reinforcing material is low density polyethylene layer, internal layer is epoxy resin layer, near internal layer and outer field intersection, uniformly dispersing has short glass fiber, and a part of short glass fiber infiltrates and is connected to internal layer and outer field interface, and is connected with outer hot melt with internal layer.
The material of described low density polyethylene layer contains carbon black; The material of described epoxy resin layer contains desiccant; Described short glass fiber is the long alkali-free glass fibre of a kind of 3～4mm.
The rainwater inspection well that described well body is up/down perforation or the sewage inspection well of upper end open lower end closed.
Described rainwater inspection well is straight-through well, three driftings, four-way well or elbow well.
Described sewage inspection well is straight-through well, three driftings, four-way well or elbow well.
Described well body is diameter variable well body or isometrical well body.
Described bell and spigot is reducing bell and spigot or isometrical bell and spigot.
Described two preparation method who moulds composite enhanced manhole is:
1) rotational moulding well mould is installed on the rotational molding machine working arm;
2) add line style ldpe resin powder (LLDPE) and carbon black in mould, its addition be traditional rotational molding technique while producing same size, model manhole weight used 30% ~ 40%, start the rotational molding machine working arm, mould is sent into to heating furnace;
3) the rotational molding machine working arm rotates, and heating furnace is warming up to 245～255 ℃, treats that mold temperature rises to 180 ° of C and is incubated 5～8 minutes again;
4) the rotational molding machine working arm stops operating, and mould exits heating furnace, now moulding of low density polyethylene layer;
5) immediately to adding rapidly short glass pricker dimension in mould, start the rotational molding machine working arm, mould is sent into to heating furnace, make the short glass fiber added uniformly topped on surface, shape chamber;
6) the rotational molding machine working arm rotates, and heating furnace is warming up to 255～260 ℃, allows short glass fiber fuse into LLDPE layer surface, is incubated 8～10 minutes, and heating furnace stops heating;
7) the rotational molding machine working arm stops operating, and mould exits heating furnace, now has quite a few short glass fiber to penetrate in the top layer of low density polyethylene layer;
8) add epoxy resin and the desiccant mixed in advance in mould, mould is sent into to heating furnace;
9) the rotational molding machine working arm rotates, and makes epoxy resin evenly be coated on mold cavity surface, utilizes the remaining warm maintenance of heating furnace 5～8 minutes;
10) the rotational molding machine working arm stops operating, and mould exits heating furnace, and epoxy resin layer completes, and a part of short glass fiber interts infiltration at internal layer and outer field interface, and is connected with outer hot melt with internal layer;
11) take apart a die after cooling, twoly mould composite enhanced manhole moulding.
The method of operating that described step 5～10 are short glass fiber and epoxy resin layer, repeatedly repeating step 5～10, form the sandwich construction of short glass fiber and epoxy resin layer cross arrangement, with the high ring rigidity manhole of can produce >=8Kn/m2 of this technique.
Add 15%-20% weight ratio French chalk in mixed uniformly epoxy resin and desiccant in described step 8.
Compared with prior art the present invention has following characteristics and beneficial effect: kind provided by the invention pair is moulded composite enhanced manhole and is not only drawn materials conveniently, maintenance cost is low, reduced use cost, and greatly strengthened the overall performance of manhole, as crushing resistance is good, intensity is high, vacuum is good, ring stiffness is large, weatherability is strong, and switching performance is good, long service life etc.The present invention can be widely used in the construction of various pipes manhole.
The accompanying drawing explanation
Fig. 1 is 1 pair of structural representation of moulding composite enhanced straight-through sewage inspection well of the embodiment of the present invention;
Fig. 2 is 2 pairs of structural representations of moulding composite enhanced straight-through rainwater inspection well of the embodiment of the present invention;
Fig. 3 is 3 pairs of structural representations of moulding composite enhanced 90 ° of elbow rainwater inspection wells of the embodiment of the present invention;
Fig. 4 is 4 pairs of structural representations of moulding composite enhanced 45 ° of elbow rainwater inspection wells of the embodiment of the present invention;
Fig. 5 is 5 pairs of structural representations of moulding composite enhanced threeway rainwater inspection well of the embodiment of the present invention;
Fig. 6 is 6 pairs of structural representations of moulding composite enhanced four-way rainwater inspection well of the embodiment of the present invention;
Fig. 7 is the composition structural representation that single layer of rings epoxy resins of the present invention strengthens the borehole wall;
Fig. 8 is the composition structural representation that the double-deck epoxy resin of the present invention strengthens the borehole wall;
Fig. 9 is the two process flow diagrams of moulding composite enhanced manhole of the present invention.
Reference numeral: 1-epoxy resin layer, 2-low density polyethylene layer, 3-bell and spigot, 4-well body, 5-short glass fiber, 6-well head.
The specific embodiment
Embodiment is referring to shown in Fig. 1～9, a kind of two composite enhanced manhole of moulding, the sidewall of its well body 4 has the bell and spigot 3 of at least one and pipeline connection, its well head 6, for being connected with well casing, is characterized in that: described well body 4, bell and spigot 3 and well head 6 are made with rotational molding technique by the double-layer plastic composite reinforcing material; The skin of described double-layer plastic composite reinforcing material is low density polyethylene layer 2, internal layer is epoxy resin layer 1, near internal layer and outer field intersection, uniformly dispersing has short glass fiber 5, part short glass fiber 5 interts infiltration at internal layer and outer field interface, and is connected with outer hot melt with internal layer.The material of described low density polyethylene layer 2 contains the carbon black that weight ratio is 2% ~ 4%; The material of described epoxy resin layer 1 contains the desiccant that weight ratio is 5% ~ 6%; Described short glass fiber 5 is the long alkali-free glass fibres of a kind of 3～4mm.Described well body 4 can be the rainwater inspection well of up/down perforation or the sewage inspection well of upper end open lower end closed.Described rainwater inspection well can be straight-through well, three driftings, four-way well or elbow well.Described sewage inspection well can be straight-through well, three driftings, four-way well or elbow well.Described well body 4 can be diameter variable well body or isometrical well body.Described bell and spigot 3 can be reducing bell and spigot or isometrical bell and spigot.
As shown in Figure 9, described two preparation method who moulds composite enhanced manhole is:
1, rotational moulding well mould is installed on the rotational molding machine working arm;
2, add the LLDPE resin-oatmeal in the rotational moulding inspection well mould, its addition be traditional rotational molding technique while producing this specification, model manhole raw material weight used 1/3rd, mould is fixed on the arm of rotomoulding apparatus and enters heating furnace;
3, start heating, the rotational molding machine working arm rotates; When furnace chamber temperature is raised to 250 ℃, after mold temperature rises to 180 ° of C and is incubated 5 clocks again;
4, the rotational molding machine working arm stops operating, and now, though manhole is molded, wall thickness does not reach; Open heating furnace door, the rotational molding machine working arm is exited to furnace chamber, rotational molding machine working arm transmission gauge tap is arranged on the crawl control model, mobile rotational molding machine working arm, stop moving the switch of cutting off the electricity supply, now moulding of low density polyethylene layer 2 in the time of directly over mould charge door court;
5, put on proximity gloves, open charge door, a certain amount of short glass fiber 5 is added, addition is depending on the specification of manhole.It is fast that reinforced action is wanted, in order to avoid cause the temperature of mould to decline to a great extent, after adding, covers tightly charge door, starts the rotational molding machine working arm mould is sent into to heating furnace;
6, start the rotational molding machine working arm and start transmission, the temperature of heating furnace can be raised to 260 ℃, be incubated 8 minutes, the short glass fiber 5 that makes to add is uniformly topped on surface, shape chamber, now has quite a few short glass fiber to enter into the top layer of low density polyethylene layer 2;
7, heating furnace is exited in the stall of rotational molding machine working arm;
8, rotational molding machine working arm rotating switch is arranged to crawl and control above, start crawl, allow the mould charge door upward; Put on proximity gloves, open charge door, will be in advance according to epoxy resin 94%-95%, epoxy resin composition after ammonium chloride 5%-6% allotment evenly adds in mould, the amount added is determined by the result of process trial, and many is a kind of wastes, has lacked quality intensity and has not reached; Add and build lid, starting rotational molding machine working arm is sent into heating furnace;
9, rotate the rotational molding machine working arm, utilize the epoxy resin composition heating of temperature to newly adding in mould, now epoxy resin becomes very rare, there is good mobility, thereby coated is to endosexine, shape chamber uniformly, short glass fiber 5 is covered fully, so just formed compound epoxy resin layer 1, simultaneously, most of short glass fiber 5 fuses with low density polyethylene layer 2, epoxy resin composition and low density polyethylene layer 2 are also realized close combination, and therefore, in the shaft wall structure tissue, glass fiber plays the role as a bridge and a link;
10, the rotational molding machine working arm stops operating, and mould exits heating furnace;
11, take apart a die after cooling, twoly mould composite enhanced manhole moulding.By the combination of epoxy resin layer 1 and low density polyethylene layer 2, the borehole wall of manhole all reaches " one residential draining plastic inspection well " requirement (J/T233-2006) fully on economic index, physical performance index.
Referring to accompanying drawing 7 and accompanying drawing 8, for some more in particular cases, need to meet higher manhole index, can take to prepare multilayer epoxy resin layer 1 and short glass fiber 5 obtains, the preparation technology that above-mentioned steps 5～10 is middle short glass fiber enhancing and epoxy resin layer 1, repeatedly repeating step 5～10, form the structure of multilayer short glass fiber and epoxy resin cross arrangement.Add again short glass fiber 5 on the basis of single layer of rings epoxy resins, take advantage of under the dry molten condition in first floor epoxy resin place and add rapidly a certain amount of short glass fiber 5, after covering tightly lid, starting rotational molding machine working arm, allow short glass fiber 5 and the full and uniform combination of epoxy resin, and then the rotational molding machine working arm that stops, uncap, add the second layer epoxy resin for preparing, mixes well; Open the rotational molding machine working arm, coated is on the surface of short glass fiber 5 equably to allow two layers of epoxy resin again, and epoxy resin clads short glass fiber, and the intensity obtained like this is higher, can meet " municipal drainage plastic inspection well " CJ/T326-2010 standard fully.As obtained requirements at the higher level, can use the technology of the present invention when the trial work journey needs the high inspection of special intensity, then overbrushing answers one deck and can realize, with the high ring rigidity manhole of can produce >=8Kn/m2 of this technique.
The present invention adopts two plastic composite materials rotational molding techniques, also can add approximately 15% ~ 20% French chalk of weight ratio in the formula of epoxy resin layer 1.
The present invention has Economic Comparability preferably, 11800 yuan/tons of epoxy resin valencys per ton, 6600 yuan/tons per ton of short glass fiber, 3500 yuan/tons of talcous valencys per ton, the straight-through well of Φ 1000mm of take is example, by the manhole gross weight of traditional rotational molding technique production, is about 100kg, carrying out production weight with two plastic composite materials rotational molding techniques is only 85kg, cost 20 ~ 25% left and right, can reduce whole investment amount greatly, only needs the sixth of traditional injection moulding well technology infusion of financial resources.
The present invention has also improved product quality when having reduced cost of production, and the LLDPE material that two plastic composite materials rotational molding techniques adopt has the following advantages: good fluidity, and plastic; Add carbon black in material, but uvioresistant is destroyed; With glass fiber, melting is preferably arranged.Mould compound and glass fiber and strengthen by two, realize the raising of the prerequisite performance indications of a series of manholes, as compressive strength, vacuum, ring stiffness, weatherability, switching performance, application life, maintenance cost etc.
Claims (10)
1. mould composite enhanced manhole for one kind pair, the sidewall of its well body (4) has the bell and spigot (3) of at least one and pipeline connection, its well head (6), for being connected with well casing, is characterized in that: described well body (4), bell and spigot (3) and well head (6) are made with rotational molding technique by the double-layer plastic composite reinforcing material; The skin of described double-layer plastic composite reinforcing material is low density polyethylene layer (2), internal layer is epoxy resin layer (1), near internal layer and outer field intersection, uniformly dispersing has short glass fiber (5), part short glass fiber (5) infiltrates and is connected to internal layer and outer field interface, and is connected with outer hot melt with internal layer.
2. mould composite enhanced manhole for according to claim 1 pair, it is characterized in that: the material of described low density polyethylene layer (2) contains carbon black; The material of described epoxy resin layer (1) contains desiccant; Described short glass fiber (5) is the long alkali-free glass fibre of a kind of 3～4mm.
3. mould composite enhanced manhole for according to claim 1 pair, it is characterized in that: the sewage inspection well well body that described well body (4) is the rainwater inspection well well body of up/down perforation or upper end open lower end closed.
4. mould composite enhanced manhole for according to claim 3 pair, it is characterized in that: described rainwater inspection well is straight-through well, three driftings, four-way well or elbow well.
5. mould composite enhanced manhole for according to claim 3 pair, it is characterized in that: described sewage inspection well is straight-through well, three driftings, four-way well or elbow well.
6. mould composite enhanced manhole for according to claim 1 pair, it is characterized in that: described well body (4) is diameter variable well body or isometrical well body.
7. mould composite enhanced manhole for according to claim 1 pair, it is characterized in that: described bell and spigot (3) is reducing bell and spigot or isometrical bell and spigot.
8. mould composite enhanced manhole for as described as claim 1～7 any one pair, its preparation method is:
1) rotational moulding well mould is installed on the rotational molding machine working arm;
2) add linear ldpe resin powder and carbon black in mould, its addition be traditional rotational molding technique while producing same size, model manhole weight used 30% ~ 40%, start the rotational molding machine working arm, mould is sent into to heating furnace;
3) the rotational molding machine working arm rotates, and heating furnace is warming up to 245～255 ℃, treats that mold temperature rises to 180 ° of C and is incubated 5～8 minutes again;
4) the rotational molding machine working arm stops operating, and mould exits heating furnace, now moulding of low density polyethylene layer (2);
5) immediately to adding rapidly short glass pricker dimension (5) in mould, start the rotational molding machine working arm, mould is sent into to heating furnace, make the short glass fiber (5) added uniformly topped on the internal shape cavity surface;
6) the rotational molding machine working arm rotates, and heating furnace is warming up to 255～260 ℃, is incubated 8～10 minutes, and heating furnace stops heating;
7) the rotational molding machine working arm stops operating, and mould exits heating furnace, now has quite a few short glass fiber (5) to penetrate in the top layer of low density polyethylene layer (2);
8) add epoxy resin and the desiccant mixed in advance in mould, mould is sent into to heating furnace, now, stopped heating;
9) the rotational molding machine working arm rotates, and epoxy resin evenly is coated on to the internal shape cavity surface, utilizes the remaining warm maintenance of heating furnace 5～8 minutes;
10) the rotational molding machine working arm stops operating, and mould exits heating furnace, and epoxy resin layer (1) completes, and a part of short glass fiber (5) interts infiltration at internal layer and outer field interface, and closely links together with internal layer and skin;
11) take apart a die after cooling, twoly mould composite enhanced manhole moulding.
9. two preparation method who moulds composite enhanced manhole as claimed in claim 8, it is characterized in that: described step 5～10 are the method for operating of short glass fiber (5) and epoxy resin layer (1), repeatedly repeating step 5～10, form the sandwich construction of short glass fiber (5) and epoxy resin layer (1) cross arrangement.
10. two preparation method who moulds composite enhanced manhole as claimed in claim 9, is characterized in that: add 15%-20% weight ratio French chalk in mixed uniformly epoxy resin and desiccant in described step 8.
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Cited By (3)
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| CN103981899A (en) * | 2014-05-07 | 2014-08-13 | 沙湾县鑫驰复合材料制品有限公司 | Composite material manhole making machine |
| CN108149775A (en) * | 2017-12-26 | 2018-06-12 | 舒朋士泵业常州有限公司 | A kind of prefabricated Boosting pumping station of PE and its mounting process |
| EP3130709B1 (en) | 2015-08-11 | 2019-03-27 | Ralph-Peter Dr.-Ing. Hegler | Shaft base body made of plastic for an inspection or revision shaft |
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| EP3130709B1 (en) | 2015-08-11 | 2019-03-27 | Ralph-Peter Dr.-Ing. Hegler | Shaft base body made of plastic for an inspection or revision shaft |
| EP3130709B2 (en) † | 2015-08-11 | 2022-10-26 | Ralph-Peter Dr.-Ing. Hegler | Shaft base body made of plastic for an inspection or revision shaft |
| CN108149775A (en) * | 2017-12-26 | 2018-06-12 | 舒朋士泵业常州有限公司 | A kind of prefabricated Boosting pumping station of PE and its mounting process |
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| CN103469884B (en) | 2014-09-17 |
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Address after: 064100 Hebei province Tangshan City Yutian County Lin Tang Yubao Road North Patentee after: Tangshan Shengtong Technology Inc. difficult to understand Address before: 064100 Hebei province Tangshan City Yutian County Lin Tang Yubao Road North Patentee before: Tangshan Aoshengtong Polytron Technologies Inc. |
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Granted publication date: 20140917 Termination date: 20181010 |