CN1206432C - Retardation setting tendon cladding equipment and uses thereof - Google Patents

Abstract

The present invention relates to a retardation prestressed rib cladding device which belongs to a construction tool using novel prestressed ribs in a prestressed concrete system. A layer of retardation mortar is automatically and continuously sealed and wrapped on the prestressed ribs to form retardation prestressed ribs, and the retardation prestressed ribs are applied to a prestressed concrete member so as to form a bonding prestressed rib concrete member having the advantages of a non-bonding prestressed rib concrete member. The device has the advantages of partial compactness, unique structure, electric and hydraulic integration, simple operation and convenience transportation and cleaning, and can be used for construction on site.

Description

A kind of slow-condensing prestressed reinforcing coating unit and uses thereof

(1) technical field

The present invention relates to the prestressed concrete member construction equipment, belong to the slow-condensing prestressed reinforcing coating unit that uses in a kind of bond-retarded prestressed concrete system.

(2) background technology

Concrete compressive property is good, but tensile property is very poor.For concrete is not destroyed when bearing tensile stress, portion imbeds high strength cast iron within it, then reinforcing bar is applied pre-tensile stress, makes concrete bear higher precommpression stress.So just can give full play to the higher and higher advantage of reinforcing bar tensile strength of concrete crushing strength, resist the effect of external force jointly, avoid concrete cracking and reduce crack width, improve the supporting capacity of concrete beam, plate, Here it is prestressed concrete technology.

The appearance of prestressed reinforced concrete construction, enlarged the range of application of concrete structure, bridge, roof system and large-sized basin, pressure vessel, ocean platform that both had been suitable for building big-and-middle span etc. has the structure of specific (special) requirements, also can make small members such as roof panel, floor, penstocks, sleeper and electric pole.

According to the priority of prestressed reinforcement stretch-draw time, traditionally the prestressing method is divided into pre-tensioning system and post stretching.Pre-tensioning system is promptly by the first tension reinforcing bar of stretch-draw base, concreting then, treat that concrete reaches requirement of strength after, cut off reinforcing bar, come to apply prestressing force by the retraction of reinforcing bar self to concrete component; Post stretching is first concreting, treat that concrete reaches requirement of strength after, by the concrete self of moulding,, reach and make concrete be subjected to prestressed purpose as force application system.Post stretching is divided into the nothing bonding again and two kinds of prestress systems of bonding is arranged according to the difference of construction technology.Not having bonding is to coat to wrap up in plastics outside the grease on reinforcing bar; Have the bonding be reserving hole channel in concrete component, penetrate reinforced bar stretching after, grout injection in the duct.As seen the difference of reinforced bar stretching job practices make pre-tensioning system be difficult to realize in some occasion, and post stretching does not have the fatigue that bonding easily causes reinforcing bar and ground tackle, and the reserving hole channel that has bonding to require is pressed complicated processes such as hole grouting.If nothing bonding and bonded prestress system in the post stretching are combined, form retarded adhesive prestressed system, i.e. reserving hole channel not, must not press hole grouting, the same with no bonding system during construction, reinforcing bar is directly imbedded concrete, and after construction is finished, by be wrapped on the prestressed reinforcement retarding mortar in time prolongation and setting and harden gradually reach and bonded prestress system same effect.So just, simplified construction technology, the back of retarding mortar sclerosis simultaneously produces the effect that bonds to reinforcing bar, solves the fatigue of unbonded prestressing tendon and ground tackle, makes that the application of prestressing technique is more wide, market potential is more huge, and society that is brought and economic benefit are more remarkable.

Slow-condensing prestressed reinforcing is the common composition of the retarding mortar of prestressed reinforcement (steel wire, steel strand or thicker wire) and outer parcel, according to test and engineering practice checking, retarding mortar is under 5～40 ℃ of airtight conditions, can can be noncondensing before 20 days, 30 days, 40 days according to engine request, just sclerosis gradually afterwards, and finally reaching the above tensile and compressive strength of 30MPa, the cement mortar material of this super effect slow setting still belongs to blank at home and abroad." application study in the post stressed concrete member of slow setting material " calendar year 2001 is identified by ministerial level, the slow setting prestressing technique has been applied to engineering reality, but in construction, retarding mortar is by the hand-held plastic tape of people its winding to be wrapped up on the tangible prestressed reinforcement, can not finely satisfy construction requirement, developing a kind of apparatus-construction equipment mechanization that coats retarding mortar continuously reliably on prestressed reinforcement, is that retarding mortar and retarded adhesive prestressed system are able to the key link that engineering is applied.

(3) summary of the invention

For not engaging having bonding in the prestressing technique post stretching and having to bond, get length separately, keep away weak point separately, form retarded adhesive prestressed system, the purpose of this invention is to provide a kind of be convenient to transportation, location, operation and cleaning, and the novel slow-condensing prestressed reinforcing coating unit that weight is light, volume is less, manufacturing cost and use cost is lower is implemented on the prestressed reinforcement automatically continuously with plastic seal parcel one deck retarding mortar, formation slow-condensing prestressed reinforcing goods.

The object of the present invention is achieved like this, and it comprises haulage gear, retarding mortar propulsive mechanism, plastic overmold mechanism, typing cooling system, drags and control system.Haulage gear, the retarding mortar propulsive mechanism, plastic overmold mechanism, the typing cooling system, drag with control system is all horizontal and be installed on the frame plane, with the prestressed reinforcement is axis, retarding mortar propulsive mechanism one end is installed haulage gear, the other end of retarding mortar propulsive mechanism connects plastic overmold mechanism and typing cooling system successively, the installation axis of plastic overmold mechanism and the axis normal of prestressed reinforcement, drag with control system and be installed in the frame, respectively with haulage gear, the retarding mortar propulsive mechanism, plastic overmold mechanism, the typing cooling system with hydraulic hose and (or) be electrically connected; Haulage gear with frequency control, cover the band transmission method, realize prestressed reinforcement continuously, reliably, steadily send to, make to coat process stabilization ground and carry out; The retarding mortar propulsive mechanism is realized evenly closely knit being wrapped on the prestressed reinforcement of retarding mortar with fluid motor-driven, screw propulsion, end-delivery head method; Plastic overmold mechanism is with fluid motor-driven, right-angle handpiece, extruding forming method, be implemented in and evenly coat one deck plastics on the reinforcing bar that has wrapped up retarding mortar, retarding mortar is sealed in wherein, after the molten state plastics that the plastics extrusion main unit is extruded enter right-angle handpiece, extrude and be coated on the prestressed reinforcement that has wrapped up retarding mortar with light wall pipe base shape, through the typing cooling of typing cooling system, sealing retarding mortar; The typing cooling system is realized sizing, integer, cooling and fully cooling to clad products to fill slurry pressurization, the outer cooling typing of pipe, spray water tank cooling means in managing, and obtains set shape, size and surface; Drag with control system and drag speed governing based on fluid power, motor drag frequency control auxilliary it, realize the automatic control of whole table apparatus and to coating the quality control of prestressed reinforcement.

Because the present invention realizes the coating to the retarding mortar and the plastics of prestressed reinforcement automatically continuously, integrate mechanical electronic hydraulic, plastics, concrete technology technology, technology-intensive, each functional entity is arranged on the frame, reasonable, the simple in structure uniqueness of compact in design, it is convenient that weight is light, volume is less, simple to operate, transportation is cleaned, and safety work at the construction field (site).

(4) description of drawings

Fig. 1 is the structural representation of the embodiment of the invention.

Fig. 2 is the A-A profile of Fig. 1.

(5) specific embodiment

With reference to Fig. 1, Fig. 2, present embodiment is made up of haulage gear 3, retarding mortar propulsive mechanism 4, plastic overmold mechanism 16, typing cooling system 11, drive control system 18, and they are arranged on the frame.Haulage gear 3 adopts frequency control, covers the belt structure, cover band and compress and carry prestressed reinforcement 1, handwheel 2 is adjusted thrust, and this structure tractive force is big, speed-regulating range width, prestressed reinforcement is difficult for skidding, especially have harder mechanical property during low cruise, prevent and creep, thereby realized continuously, carried reliably, reposefully prestressed reinforcement, and the sectional dimension of clad products controlled, make to coat process stabilization ground and carry out; Retarding mortar propulsive mechanism 4 is by hydraulic motor 19, hopper 5, screw rod 7, barrel 6, end-delivery head 8 is formed, its function is retarding mortar to be advanced and be wrapped in densely on the prestressed reinforcement 1 by set cross section and size, 7 rotations of hydraulic motor 19 drive screws, screw rod 7 adopts dark hollow structures such as equidistant, screw rod 7 heads are tapered and be with spiral to put in end-delivery head 8, prestressed reinforcement 1 is sent to from screw rod 7 holes and is felt relieved, retarding mortar 20 enters barrel 6 by hopper 5, pushed to end-delivery head 8 directions gradually with the rotation of screw rod 7, together pass through end-delivery head 8 with the prestressed reinforcement of sending in screw rod 7 holes 1, evenly be wrapped on the prestressed reinforcement 1 densely by set geometric cross section and size; Plastic overmold mechanism 16 is by hydraulic motor 17, hopper 15, plastics extrusion main unit 14, right-angle handpiece 9 is formed, its function is to coat one deck plastics 21 equably on the prestressed reinforcement 1 that has wrapped up retarding mortar, retarding mortar 20 is sealed in wherein, hydraulic motor 17 provides the driving power of plastics extrusion main unit 14, plastics extrusion main unit 14 is with the plastics heating of hopper 15, carry, compression, fusion, mix, 9 of right-angle handpieces are the parts that form final slow-condensing prestressed reinforcing goods 13 shapes that coat, it is coated on the plastics of fusion and charges on the prestressed reinforcement that has wherein wrapped up retarding mortar with set cross section and size, right-angle handpiece 9 one ends connect end-delivery head 8, the other end links to each other with typing cover 10, and connecting plastics extrusion main unit 14, plastics extrusion main unit 14 is arranged vertically with prestressed reinforcement 1; Typing cooling system 11 is made up of typing cover 10 and cooling water tank 12, the set dimensionally stable of the slow setting prestressed reinforcement goods 13 of the effect of typing cover 10 plastics that have been the coatings of will extrude from right-angle handpiece 9 and retarding mortar gets off, and it is carried out finishing, thereby obtain cross sectional shape, size and surface more accurately, adopt water-cooling method to reach this purpose, cooling water tank 12 obtains final shape and size obtaining abundant must the cooling by the typing cover 10 slow setting prestressed reinforcement goods 13 that come out at this; Drag with control system 18 and form by a Hydraulic Station and control cabinet, Hydraulic Station is realized hydraulic motor 17, the pressure oil supply of hydraulic motor 19 and to its output shaft by required torque and rotating speed operation, hydraulic motor 17, hydraulic motor 19 adopts the cycloid formula, this hydraulic motor torque is big, volume is little, speed adjustable range is big, dragging by motor and reducer of haulage gear 3 drives, and through frequency control, the use of reducer has increased the torque of motor, reduce the capacity of frequency converter and motor, improve the operating frequency of haulage gear 3 drive systems, guarantee the stability of haulage gear 3 low-speed motions, control cabinet comprises the driving of Hydraulic Station Oil pump electrical machinery, hydraulic motor 17, the Electromagnetic Control of hydraulic motor 19, the heating-up temperature of plastics extrusion main unit 14 is controlled automatically, haulage gear 3 variable frequency regulating speed control, the driving of the coolant pump motor of typing cooling system 11, by dragging the co-ordination that guarantees each executing agency with control system 18, the adjustment coupling of technological parameter realizes the automatic control of integrating apparatus and the control of coating prestressed reinforcement quality.

Operating principle: prestressed reinforcement 1 compresses and steadily sends into reliably retarding mortar ejecting mechanism 4 through the crawler belt up and down of haulage gear 3, retarding mortar enters the prestressed reinforcement 1 that barrel 6 pushes to send in end-delivery head 8 and screw rod 7 holes with the rotation of screw rod 7 by hopper 5 and together is wrapped on the prestressed reinforcement by end-delivery head 8, wrap up the prestressed reinforcement 1 of retarding mortar and sent into plastic overmold mechanism 16 subsequently, plastics add through hopper 15, plastify into uniform melt by plastics extrusion main unit 14, with the molten state level pressure, quantitatively, constant temperature ground is extruded and is coated on the prestressed reinforcement 1 that has wrapped up retarding mortar 20 from right-angle handpiece 9, through 10 sizing shaping and the coolings of typing cover, cool off fully through cooling water tank 12 again, form slow-condensing prestressed reinforcing goods 13 with certain cross sectional shape size and surface quality.

Claims (3)

1. slow-condensing prestressed reinforcing coating unit, contain haulage gear (3), retarding mortar propulsive mechanism (4), plastic overmold mechanism (16), typing cooling system (11), drag and control system (18), it is characterized in that: haulage gear (3), retarding mortar propulsive mechanism (4), plastic overmold mechanism (16), typing cooling system (11), drag with control system (18) is all horizontal and be installed on the frame plane, with prestressed reinforcement (1) is axis, retarding mortar propulsive mechanism (4) one ends are installed haulage gear (3), the other end of retarding mortar propulsive mechanism (4) connects plastic overmold mechanism (16) and typing cooling system (11) successively, the axis normal of the installation axis of plastic overmold mechanism (16) and prestressed reinforcement (1), drag with control system (18) and be installed in the frame, respectively with haulage gear (3), retarding mortar propulsive mechanism (4), plastic overmold mechanism (16), typing cooling system (11) with hydraulic hose and (or) be electrically connected, retarding mortar propulsive mechanism (4) is with fluid motor-driven, screw propulsion, the end-delivery head method, realize evenly closely knit being wrapped on the prestressed reinforcement of retarding mortar, hydraulic motor (19) drive screw (7) rotation, screw rod (7) adopts dark hollow structures such as equidistant, screw rod (7) head is tapered and be with spiral to put in end-delivery head (8), prestressed reinforcement (1) is sent to from screw rod (7) hole and is felt relieved, retarding mortar (20) enters barrel (6) by hopper (5), pushed to end-delivery head (8) direction gradually with the rotation of screw rod (7), together pass through end-delivery head (8) with the prestressed reinforcement of sending in screw rod (7) hole (1), after the molten state plastics that plastics extrusion main unit (14) is extruded enter right-angle handpiece (9), extrude and be coated on the prestressed reinforcement (1) that has wrapped up retarding mortar (20) with light wall pipe base shape, through the typing cooling of typing cooling system (11), sealing retarding mortar (20).

2. slow-condensing prestressed reinforcing coating unit according to claim 1, it is characterized in that: plastic overmold mechanism (4) is with fluid motor-driven, right-angle handpiece, extruding forming method, be implemented in and evenly coat one deck plastics on the reinforcing bar that has wrapped up retarding mortar, retarding mortar is sealed in wherein, hydraulic motor (17) provides the driving power of plastics extrusion main unit (14), right-angle handpiece (9) then is the parts that form final slow-condensing prestressed reinforcing goods (13) shape that coats, it is coated on the plastics of fusion and charges on the prestressed reinforcement (1) that has wherein wrapped up retarding mortar (20) with set cross section and size, right-angle handpiece (9) one ends connect end-delivery head (8), the other end links to each other with typing cover (10), and connecting plastics extrusion main units (14), plastics extrusion main unit (14) is arranged vertically with prestressed reinforcement (1).

3. slow-condensing prestressed reinforcing coating unit according to claim 1 is characterized in that: haulage gear (3) with frequency control, cover the band transmission method, realize prestressed reinforcement continuously, reliably, steadily send to, make to coat process stabilization ground and carry out.

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