CN2088930U

CN2088930U - Moving supporting device for two step method working of jacket tube

Info

Publication number: CN2088930U
Application number: CN 91213017
Authority: CN
Inventors: 刘景秀
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-01-03
Filing date: 1991-01-03
Publication date: 1991-11-20

Abstract

The utility model relates to a moving supporting device for two-step method working of a jacket tube, which is composed of a ring stand, an inner support, an outer support, a spray gun, a traction ring, etc. The utility model is characterized in that the inner support, the outer support and the spray gun are all fixed on the ring stand. When working, the device can move in an interlayer of the jacket tube. When the spray gun sprays polyurethane, the device can move outward along the interlayer. The utility model can ensure the concentricity of the jacket tube to complete the work progress of the polyurethane jacket tube, can omit a ring support in the jacket tube to overcome the disadvantage of adding the ring support in the two step method working at present, and can enhance the concentricity of the jacket tube and the quality of the finished product. The utility model has the advantages of material saving, low cost and high work efficiency, and the utility model can be used in the fields, such as the petrochemical, the defense building, etc.

Description

Moving supporting device for two step method working of jacket tube

Be used to make the two step method construction activities support device of jacket tube in a kind of jacket tube production field that the utility model relates to.

In recent years, the jacket tube that adopts urethane foam to make thermal insulation layer has at home and abroad obtained developing rapidly, has been widely used in fields such as petrochemical industry and national defence building.At present, the jacket tube two step method constructing device of domestic extensive employing is the plastic support ring.During construction, the steel pipe of certain-length is moved on on the sleeve pipe platform, (about one meter) installs the plastic support ring of some on steel pipe at a certain distance, to guarantee the concentricity of steel pipe and outer sleeve, the outer sleeve that will give system then is enclosed within on the support ring, with spray gun the polyurethane mixture is injected its interlayer again, make jacket tube.The support ring that extensively adopts in producing at present has two kinds, what Fig. 1 provided is a kind of two views of monomer supporting element, it is made up of support body 1 and stiffening rib 2 that arc props up face 4, and on support body 1, be provided with opening 3, during construction, passing opening 3 with rope band is together in series one group of monomer supporting element, its arc-shaped base is stuck on the steel pipe, again each monomer supporting element is evenly distributed on the steel pipe and tightens, form annular brace, put outer layer sleeve then, pour into a mould in interlayer or spray polyurethane mixture in the space of passing between the monomer support ring, makes jacket tube, adopts this monomer supporting element, its major defect is: (1) is because support is to be fixed in the pipe, in the spray process,, the gas discharge between the support is obstructed because a part stops that the material on supporting foams at once, cause that polyurethane foam is inhomogeneous and produce bigger cavity, be easy to generate waste product.(2) the installation workpiece is cumbersome, and not only time-consuming but also require great effort, efficiency of construction is low.(3) waste a large amount of supporting elements, increased engineering cost.What Fig. 2 provided is a kind of structural representation of annular support member.Figure three is its sections.In Fig. 2: the 5th, supporting foot, the 7th, annular support body, the 6th, tooth engaged.8 is inclined-planes in figure three.During construction, unclamp tooth engaged 6, annular support body 7 is stuck on the steel pipe, tighten tooth engaged 6 then and be fixed, 8 directions are inserted in outer sleeve along the inclined-plane again, pour into a mould or make jacket tube with spray gun spray polyurethane.Though adopt this support can guarantee concentricity preferably and save certain man-hour, but still exist and the same shortcoming of monomer supporting element shown in Figure 1.

The purpose of this utility model is a kind of improvement design that need not support that proposes at the deficiency of above-mentioned employing support construction.

Technology of the present utility model is situated between, and certainly scheme is as follows:

Describe below in conjunction with accompanying drawing.

Fig. 4 is an agent structure cross-sectional schematic of the present utility model.

Fig. 5 is a right elevation of the present utility model.

Fig. 6 is a construction schematic representation of the present utility model.

Right elevation when Fig. 7 is the utility model construction.

11 is ring supports in Fig. 4, the 12nd, and outer supporting element, the 13rd, interior supporting element, the 14th, support, outer, interior supporting

element

12,13 is installed on the ring support 11, during construction by support 14, interior supporting element 13 is pressed on the outer wall of steel pipe, and outer supporting element 12 is pressed on the inwall of outer sleeve.The concentricity of inner and outer pipe in order to guarantee to construct, the visual caliber size of the logarithm of inside and outside supporting element is selected, and what provide among the figure is six pairs of supporting elements, also can be made into fixedly or adjustable according to the thickness of interlayer supporting element, and what provide among the figure is fixed.The 15th, spray gun, the 16th, nozzle, the 17th, retaining ring, the 18th, supply pipe, spray gun 15 is fixed on the ring support 11 by retaining ring 17, and during construction, the polyurethane mixture enters spray gun 15 by supply pipe.The 19th, draw ring with manpower or power pulling draw ring 19, can make this device move in interlayer during construction.In Fig. 5, the 11st, ring support, the 12nd, outer supporting element, the 13rd, interior supporting element, the 16th, nozzle.In Fig. 6, during construction ring support 11 of the present utility model is enclosed within on the steel pipe 20, according to the thickness of interlayer between inside and outside tin, suitably select the size of ring support 11 and supporting

element

12,13, supporting element 13 just in time is pressed on the outer wall of steel pipe 20 in can making, and puts outer sleeve 21 then, at this moment, outer supporting element 12 just in time is pressed on the inwall of outer sleeve 21, according to the logarithm of the selected supporting element of the size of caliber, can guarantee the concentricity of inner and outer pipe 20,21.Because in,

outer support

13 and 12 and be fixed on the ring support 11 by supporting frame 14, spray gun 15 is fixed on the ring support 11 by retaining ring 17, when spray, on draw ring 19, impose suitable pulling force, polyurethane material is by supply pipe 18 input spray guns 15, ejection from nozzle 16, the polyurethane of ejection forms hard polyurethane foam in moment at a high speed, simultaneously, under the expansive force and the tension on the draw ring 19 that when reaction, is produced, the utility model will withdraw to pipe is outer along interlayer by the frothing foam extension speed, and while heat and gas discharge along the interlayer gap, the interlayer after the rigid foam after the foaming is full of the utility model and leaves.Constantly supply with the polyurethane mixture, continue foaming, the utility model is worked continuously in interlayer until finishing construction, withdraw from interlayer.In Fig. 7, the 11st, ring support, the 12, the 13rd, outside, interior supporting element, the 16th, nozzle, the 20th, steel pipe, the 21st, outer sleeve.

The utility model is melted into a whole spray gun and support, has saved the support in the two step method construction, has avoided the phenomenon of being obstructed that foams, and has improved exhaust conditions, has improved quality of product, has reduced labor intensity, has improved work efficiency, has saved material, has reduced cost.To produce 1000 meter 159 steel pipe overcoat 280 jacket tube polyurethane heat-insulation is example, if adopt traditional two step method construction, need add 1000～1250 of support rings, expense is 2000～3500 yuan, and adopt this device only to need 50～60 yuan of costs, and reusable, greatly reduce cost, and quality of product improves, and saves about 3 times of man-hour.

Claims

1, a kind of jacket tube two step method construction activities support device, in ring support 11, outer supporting element 13 and 12 and spray gun 15, draw ring 19 compositions such as grade, it is characterized in that inside and outside supporting element 13 and 12 is fixed on the ring support 11 with support 14 respectively, spray gun 15 usefulness retaining rings 17 are fixed on the ring support 11.

2, device according to claim 1, its feature is installed between outer sleeve 21 and the steel pipe 20 at it, its outer supporting element 12 is pressed on the inwall of outer sleeve 21, and interior supporting element 13 is pressed on the outer wall of steel pipe 20, and whole device can move between the interlayer of outer sleeve 21 and steel pipe 20.