CN102101356A - Forming machine of reinforced plastic pipe special for ground source heat pump - Google Patents
Forming machine of reinforced plastic pipe special for ground source heat pump Download PDFInfo
- Publication number
- CN102101356A CN102101356A CN2009102635272A CN200910263527A CN102101356A CN 102101356 A CN102101356 A CN 102101356A CN 2009102635272 A CN2009102635272 A CN 2009102635272A CN 200910263527 A CN200910263527 A CN 200910263527A CN 102101356 A CN102101356 A CN 102101356A
- Authority
- CN
- China
- Prior art keywords
- plug
- heat pump
- reinforced plastic
- source heat
- steel wire
- 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.)
- Pending
Links
Images
Abstract
The invention relates to a forming machine of a reinforced plastic pipe special for a ground source heat pump. The ground surface below where people live (about longer than 5m) is a constant temperature layer at a temperature equivalent to a local annual average air temperature (about 20 DEG C) so that a ground source heat pump air-conditioning system capable of exchanging geothermal heat as low-potential energy with room air by utilizing high-potential energy (electric energy) occurs, and can supply heat in winter and cool in summer by utilizing the underground temperature layer. The ground source heat pump emphasizes and focuses on underground heat exchange pipes and generally adopts heat exchange pipes made from PE (Polyethylene) of D32*3mm at present.. The underground heat exchange pipes special for the ground source heat pump are produced with the forming machine in the invention by the following steps: extruding high-elasticity plastic strips with a flat machine head to spirally wind around a mandrel while spirally winding a steel mesh belt; thermally embedding in the plastic strips; and calendaring and cooling to form an embedded reinforced plastic pipe. Compared with a common PE pipe, the reinforced plastic pipe improves the thermal conductivity by 3-4 times, enhances the strength by 2-3 times, decreases the cost by one third and prolongs the service life over 50 years.
Description
Technical field the present invention relates to the dedicated reinforced plastic tube make-up machine of a kind of earth source heat pump.
Background technology universe was before 100～15,000,000,000 years, produced in the once big collision.According to the science measuring and calculating, the earth has formed 4,500,000,000 years, and the earth's crust that earth surface condenses into also has the history in 4,000,000,000 years.The space material of countless high compression and the decay of inner radiation material heated this rock group (earth) around solar motion, and elements such as the iron that has melted, nickel sink toward ground ball center, and light material come-up has finally formed the earth's crust, earth mantle and the earth's core.The earth's crust is the outmost top layer of the earth, its variable thickness.Thick 3～the 15km of the earth's crust under the ocean, average 8～10km; Thick 20～the 65km of continental crust, average 40km.In the earth's crust surface 5km (take up an area of thickness of the shell 1/8), be the shallow layer geothermal energy development zone of generally acknowledging in the world at present.Extensively be present in the nearly top layer of the earth, its temperature levels is a little more than the temperature on average of locality, and under different regions, different weather conditions, the variations in temperature of geothermal using is little, and is relatively stable.
Human lives's atmospheric environment, along with changes of seasons, temperature has very big difference.Some local sweltering heat in summer, temperature reaches 40 ℃; Winter cold, temperature is sometimes below-30 ℃.For fear of decocting of severe cold and heat, the mankind have invented with the fire heating, " air-conditioning " occurred after science and technology is flourishing.Air-conditioning is power with the electricity, and summer, refrigeration was regulated temperature, heated heating winter.Electric energy is a kind of high potential, and it is produced by coal, oil and regenerative resource, and coal and oil etc. are non-renewable energy resources, and the energy is the material base that the mankind depend on for existence and development.Along with human civilization progress and social development, human consumption to the energy is more and more, can cause serious consequences such as lack of energy, ecological deterioration.
Ground source heat pump technology is the appearance along with global energy crisis and environmental problem, gradually a heat pump techniques of Xing Qiing.It is a kind of by input a spot of high potential (electric energy), realizes the heat pump type air conditioning system that shifts to high level heat from shallow layer geothermal energy (Lowlevel thermal energy soil heat energy, the underground water or the Lowlevel thermal energy in the surface water).It is to reduce CO
2The low carbon technique of discharging is the important component part of low-carbon (LC) dwelling house in the low-carbon (LC) life.Earth-source hot-pump system mainly is made up of four parts: 1. shallow layer geothermal energy acquisition system, 2. water source heat pump units (water/hydro-thermal pump or water/air heat pump), 3. indoor heating air-conditioning system, 4. control system.
So-called geothermal using acquisition system is meant by water or adds the aqueous solution of antifreezing agent, and heat pump is gathered out and flowed to the heat energy in ground body or underground water, the surface water.The main distinction of geothermal heat pump air-conditioning system and traditional air-conditioning is to have increased a geothermal heat exchanger, i.e. underground buried tube loop.No matter be to adopt geothermal heat pump air-conditioner or adopt traditional boiler and refrigeration machine, concerning the interior of building air-conditioning system, do not have big difference in design.Therefore, the application of ground source heat pump technology, its key and difficult point also just are geothermal heat exchanger is reasonably designed, constructs and installs, and itself and source pump and air conditioning terminal system optimization are mated.Underground heat exchanger can be divided into horizontal coiled pipe and vertical pipe laying two big classes.The advantage of horizontal coiled pipe is to be embedded in soft clay area, and cost is lower, but heat transfer condition is subjected to extraneous winter, summer climatic influences, and major defect is that floor space is big, is not suitable for the national conditions that China has a large population in a small area.Vertically pipe laying is in the plurality of vertical hole underground heat exchanger to be set.Lack because vertical buried tube heat exchanger has to take up an area of, advantages such as stable work in work have become the leading form in the engineering application.
The vertical vertical hole of buried tube heat exchanger, the degree of depth of boring is generally 60～100m, bore dia 150～200mm, spacing 4～6m of Kong Yukong.Vertically the pipe laying in the hole is different with common heat exchanger, and it is not two kinds of heat exchange between the fluid, but the heat exchange of fluid and solid (stratum) in the pipe laying.The physical model that this heat transfer process relates to is very complicated, and the factor that relates to is also a lot, and it is unstable state, and time span is very long.Therefore, require underground buried tube that good thermal conductivity is arranged, higher intensity is arranged, high corrosion resistance is arranged to guarantee the service life (centre is not keeped in repair, can't be keeped in repair yet) more than 50 years.Through detailed calculated, the practical contrast of test of many times and engineering (galvanized pipe, cast iron pipe, steel-plastics composite pipe, PAP, PPR pipe, PE pipe etc.), from multi-analysis such as manufacturability, durability, economy, generally acknowledge that at last polyethylene (PE) is the most suitable as the material of burying the ground heat exchanger tube.The internal diameter of this PE pipe is 26mm, wall thickness 3mm, and external diameter 32mm, its advantage is corrosion-resistant, and cost is moderate, and shortcoming is that intensity is low, and thermal resistance is big.No matter be domestic or abroad, no matter be the north or south, all designing units select the pipe laying of the PE pipe of Φ 32*3 as the earth source heat pump heat exchanger for use.This also does something against one's will, because up to the present, the whole world does not also find a kind of combination property heat exchanger pipe with being better than burying of existing PE pipe.
The PE pipe that summary of the invention purpose of the present invention just provides a kind of and traditional Φ 32*3 compares, and 3～4 times of thermal conductivity factor raisings, intensity improve 2～3 times, and cost reduces by 1/3, and bury ground dedicated reinforced plastic tube at the earth source heat pump more than 50 years service life.
The PE pipe of traditional Φ 32*3 is to use screw extruder, with modified PE particulate material heating and melting, by the extrusion molding of circle mould head, becomes product behind the cooling sizing.The present invention pressurizes modified PE particulate material heating and melting with extruder, extrude the plastic strap of elastomeric state by dull and stereotyped head, be wound on the plug of Φ 26mm, use and dial the net axle and make it make axial straight line to move (rectilinear motion) while twining (circular motion), circular motion and rectilinear motion synthesize screw, and the plastic strap under the elastomeric state just has been rolled into pipe.Regulate pitch and then can regulate wall thickness (number of plies of winding is many, and wall thickness is with regard to corresponding increase).The centre of which floor plastic strap (for example totally 6 layers twine the 3rd layer after), be entangled to steel wire net-belt from other direction, the pitch of steel wire net-belt also can be regulated, the plastic strap of back covers on the steel wire net-belt, after compressing, steel wire net-belt is embedded in regard to heat in the middle of the plastic tube wall, forms reinforced plastic pipe.
It is to draw according to calculating of semiempirical computing formula and the experimental data listed below that the dedicated reinforced plastic tube of earth source heat pump that the present invention produces, thermal conductivity factor improve 3～4 times.The analysis of Heat Transfer of buried heat exchanger does not also have universally recognized model and standard in the world up to now.The complexity of heat and moisture transfer problems in the soil porous media, existing in the world ground heat exchanger heat transfer model adopt pure conduction model mostly, have ignored the influence of porous media.Based on the semiempirical design calculation formula of thermal resistance notion, be mainly used to length according to the required pipe laying of hot and cold load estimate ground heat exchanger.Be called for short the method affect maximum that (IGSHPA) recommends with international earth source heat pump association (International Ground Source Heat Pump Association) in these class methods, China is basic with reference to the IGSHPA method in " the earth-source hot-pump system engineering legislation " formulated in 2005.The required ground heat exchanger boring total length of heat supply and cooling is calculated as follows:
H--heat supply in the formula; The C--cooling; The length of L-boring;
The nominal output (heating or refrigerating capacity) under the design inflow temperature of CAP-heat pump;
The coefficient of performance of COP-heat pump;
F-moves share; R
pAnd R
s-be respectively the thermal resistance of tube wall and the thermal resistance of ground;
T
∞--the underground undisturbed mean temperature that is;
T
MaxAnd T
Min-the highest and minimum inflow temperature.
As can be seen from the above equation, reduce the total length L (promptly reducing the consumption of PE pipe) of boring, most important measure is to reduce the thermal resistance of tube wall and the thermal resistance of ground.Reduce the thermal resistance of ground, can carry out careful research to backfilling material, the for example infiltration coefficient of backfill, the mechanical characteristics such as bonding force, resistance to compression and rupture strength, elastic modelling quantity, shear modulus and Poisson's ratio of infiltration between ratio, backfilling material and the PE pipe, finite element analysis to hot compression deformation, estimate that with limited element analysis technique the interface thermal contact resistance is to the influence of conducting heat or the like, reduce the thermal resistance of ground and in well-designed and well construction, finish, reduce the thermal resistance of tube wall and finish by the present invention.
The dedicated reinforced plastic tube of earth source heat pump that the present invention produces, thermal conductivity factor improves 3～4 times, mainly is the thermal resistance that reduces tube wall.The thermal resistance that reduces tube wall has two approach: the one, in tube wall, increased steel wire, and do not subtract in intensity under the prerequisite of (only can improve), wall thickness becomes 2mm from 3mm, attenuate 1mm, the corresponding minimizing of thermal resistance; The 2nd, in tube wall, increased steel wire, be equivalent in tube wall, erect " heat bridge ", the thermal conductivity of steel is 48w/ (m.k), and the thermal conductivity of polyethylene (PE) is about 10w/ (m.k), and the thermal resistance (raising thermal conductivity) that as seen reduces tube wall is very tangible.
The dedicated reinforced plastic tube of earth source heat pump that the present invention produces, intensity improve 2～3 times and are based on that following theory and experiment draw.Calculate different (the steel pipe wall thickness calculates from about) with the stress analysis and the pipeline wall thickness of steel pipe, bury in the ground plastic tube design national extensive use ring stiffness notions such as ISO, Britain, Finland, ring stiffness S
R, Kpa:
S
R＝EI/Dm
3 (2)
In the formula: the elastic modelling quantity of E-tubing, Kpa;
The moment of inertia of I--unit length tube wall, for solid wall pipe,
I＝e
3/12
E-solid wall pipe wall thickness, m
Dm-manages average diameter, m.
Following formula is written as S
R=E (e
3/ 12)/Dm
3(3)
From formula (3) as can be seen, caliber is identical, the pipe that wall thickness equates, and the big more pipe of tubing elastic modelling quantity (E), ring stiffness is just big more.The present invention embeds the winding steel wire net in plastic tube wall, the elastic modelling quantity of steel is 580 times of plastics, has significantly increased the elastic modelling quantity of tube wall, learns through flattening test, and the intensity of reinforced plastic pipe has improved 2～3 times.
It can also be seen that caliber identical (Dm), ring stiffness (S from formula (3)
R) require the same pipe, the big pipe of tubing elastic modelling quantity (E), wall thickness just can be done thinlyyer.Wall thickness reduction, PE material consumption reduces, and this is that every meter unit price of the present invention reduces by 1/3 reason.
Because being PE, winding steel wire net of the present invention expects that heat is embedded in the plastic tube wall, is different from other reinforcement methods under high-elastic state.The reinforced plastic pipe that certain factory produces is reported in CCTV news hookup on August 26 in 2009, and supply falls short of demand; the technology that this factory produces reinforced plastic pipe is: extrude interior pipe with circle mould head earlier; after pipe cools off in treating; twine individual wire (spiral winding) at inner tube outer surface, also will add vertical steel wire specific (special) requirements person.Outside twining the steel wire that gets on, twine adhesive tape again, with not loose, the not corrosion of protection steel wire.This kind method is difficult to assurance and does not intake from the adhesive tape lap-joint of twining, so also can not get the service life of whole pipe guaranteeing.The present invention is a winding steel wire net under the hot embedding state, and plastics and steel wire are seamless overlap joint, and steam can't enter tube wall at all, according to the measuring and calculating of life-span of modified PE material, so the service life that can guarantee pipe is more than 50 years.
Description of drawings is described in further detail the present invention below in conjunction with accompanying drawing:
Accompanying drawing 1 is the dedicated reinforced plastic tube make-up machine of an earth source heat pump front view.It transfers to axle 6, plastic board head 7, steel wire 8 etc. to form by frame 1, plug gear 2, reducer gear 3, group net axle 4, plug 5, press polish.
Frame 1 is formed by the shaped steel assembly welding, and plug gear 2 is fixed on the supporting base of frame 1 centre. Plug 5 is enclosed within on the plug gear 2, and plug gear 2 rotates plug 5 and also can rotate thereupon. Dialling net axle 4 can under the cylinder dynamic action, move up and down and also can rotate under electric reducer drives. Press polish outgoing shaft 6 can upwards compress plug 5 under the effect of hydraulic cylinder, also can leave downwards, and press polish outgoing shaft 6 can be rotated under self electric reductor drives. The dull and stereotyped head 7 of plastic extruder can be extruded the adjustable elastomeric state PE band of bandwidth. Steel wire 8 has suitable fabric width, and rolling is enclosed within on the little axle, can unclamp with the rotation of little axle to lengthen.
The specific embodiment checks whether each parts installation of reinforced plastic pipe make-up machine is firm, and whether move flexible, and whether compressed air, cooling water, power supply are connected, and checks the back preparation start that finishes.Add the modified PE material with the screw extruder preheating and from hopper, the PE material of extruding from extruder screw forms through dull and stereotyped head 7 that about 300mm is wide, the hot PE band of the thick elastomeric state of 0.4mm.Start the reductor of reducer gear 3, the power of this reductor is threephase asynchronous, with frequency control reducer gear 3 is transferred to suitable rotating speed, drives plug gear 2 and rotates, and the plug 5 that is enclosed within on the plug gear 2 also rotates thereupon.Continuously the PE band rides on the plug 5, simultaneously steel wire net-belt is also ridden on the plug, and the fabric width of steel wire is 100～150mm, and steel wire is positioned at the centre of PE strip material, and PE strip material fabric width can cover steel wire fully.At this moment, the PE material covers steel wire and make circular motion on plug 5, with hand (band asbestos gloves) promote PE steel wire circle (to go out tube side to), arrive and dial after net axle 4 belows, starting cylinder makes and dials net axle 4 and be pressed onto on the PE steel wire circle and (promptly be pressed onto on the plug 5), allow simultaneously and dial net axle 4 rotations (being the inhour rotation in the accompanying drawing 1), make PE steel wire circle on plug 5, make axial linear movement, with the synthetic screw of the circular motion of original plug 5.Continuous feed, constantly screw just can be produced the reinforced plastic pipe that spiral twines.In order to eliminate the vestige that spiral twines lap-joint, and make PE material and steel wire closelyr chimeric, transfer to axle 6 so set up press polish, the operation that axle 6 is transferred in press polish is netted spools 4 identically with dialling, but direction of rotation is opposite, so that the demoulding (depoling rod).
After the reinforced plastic pipe of producing left make-up machine, the water cooling and shaping after producing certain-length (80m or 100m), cut off with toothless saw immediately, went up volume then, packed and dispatch from the factory.Before cutting off as yet about 80m or the long reinforced plastic pipe of 100m, the connecting gear on the production line will be applied for a patent separately.
Claims (6)
1. dedicated reinforced plastic tube make-up machine of earth source heat pump is characterized in that: it by frame, plug gear, reducer gear, dial net axle, plug, press polish and transfer to axle, plastic extruder flat board head, steel wire etc. to form.
2. the dedicated reinforced plastic tube make-up machine of earth source heat pump according to claim 1, it is characterized in that: frame is formed by the shaped steel assembly welding, and the plug gear is supported in the middle of the frame, and reducer gear drives the plug gear and rotates.
3. the dedicated reinforced plastic tube make-up machine of earth source heat pump according to claim 1 is characterized in that: plug is connected on the plug gear with bolt, can make uniform circular motion under the drive of plug gear.
4. the dedicated reinforced plastic tube make-up machine of earth source heat pump according to claim 1, it is characterized in that: the elastomeric state plastic strap that dull and stereotyped head is extruded rides on the plug and twines, steel wire net-belt also rides on the plug and twines, the fabric width of steel wire net-belt is less than the fabric width of plastic strap, and steel wire can be by plastic wraps therein.
5. the dedicated reinforced plastic tube make-up machine of earth source heat pump according to claim 1, it is characterized in that: dial the rotation of net axle and make the steel wire net-belt that is wrapped on the plug make axial linear movement along plug, plug also self rotates and makes circular motion, the screw of just having synthesized steel wire.
6. the dedicated reinforced plastic tube make-up machine of earth source heat pump according to claim 1, it is characterized in that: press polish transfers to axle to rotate and compress the reinforced plastic pipe of spiral forming, force it to break away from plug, the reinforced plastic pipe water cooling that breaks away from plug, but just rolling of cut-out, packing are dispatched from the factory after sizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102635272A CN102101356A (en) | 2009-12-22 | 2009-12-22 | Forming machine of reinforced plastic pipe special for ground source heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102635272A CN102101356A (en) | 2009-12-22 | 2009-12-22 | Forming machine of reinforced plastic pipe special for ground source heat pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102101356A true CN102101356A (en) | 2011-06-22 |
Family
ID=44154505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102635272A Pending CN102101356A (en) | 2009-12-22 | 2009-12-22 | Forming machine of reinforced plastic pipe special for ground source heat pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102101356A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108262936A (en) * | 2016-12-31 | 2018-07-10 | 浙江双林机械股份有限公司 | Organ type pressure roller structure and method of work |
-
2009
- 2009-12-22 CN CN2009102635272A patent/CN102101356A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108262936A (en) * | 2016-12-31 | 2018-07-10 | 浙江双林机械股份有限公司 | Organ type pressure roller structure and method of work |
| CN108262936B (en) * | 2016-12-31 | 2024-04-09 | 浙江双林机械股份有限公司 | Organ type pinch roller structure and working method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101408359B (en) | Pile imbedded helix tube type ground source heat pump system and heat transferring model of terrestrial heat exchanger thereof | |
| CN106168418B (en) | A kind of CCHP diaphram wall device and its construction method | |
| CN101153674A (en) | Continuously reinforced plastic heat-preserving composite pipeline used for oil field ground and its manufacturing technique | |
| CN201868143U (en) | Forced-cooled energy-saving power cable | |
| CN102101356A (en) | Forming machine of reinforced plastic pipe special for ground source heat pump | |
| CN202914975U (en) | Novel steam straight-buried pipe fixed knot | |
| CN201731179U (en) | Double-layer heat preservation pipe | |
| CN216239120U (en) | Prefabricated embedded coil pipe composite ecological wall heat storage and release system | |
| CN101846218B (en) | Cold/heat flow media varying-area channel | |
| CN207122669U (en) | A kind of insulating plastic pipe tubular construction | |
| CN101482213B (en) | Plastic lining composite pipe | |
| CN104831814A (en) | Shear key of outer hanging wall plate | |
| CN2488008Y (en) | Solar energy combined heat collector for mounting on wall | |
| CN207936817U (en) | Impregnate sandstone heat-storing device | |
| CN108731300A (en) | A kind of building comprehensive energy feed system | |
| CN106766364A (en) | A kind of energy pile-Concrete-filled Double Skin Steel Tube Columns geothermal heating system | |
| CN206738803U (en) | Ribbon heater pipeline configuration | |
| CN201866425U (en) | PP-R (polypropylene) plastic pipe | |
| CN203202439U (en) | Thermal-insulation heating pipeline made of composites | |
| CN201386865Y (en) | Braiding reinforced composite pipe | |
| CN211926176U (en) | Heat exchange tube for enhancing heat exchange | |
| CN201306535Y (en) | Plastic-lined composite tube | |
| CN201100491Y (en) | Aluminum plastic compound tube for building engineering | |
| CN102277931A (en) | System for reclaiming solar energy in buildings | |
| CN201607150U (en) | Geothermal pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110622 |