CN202868122U - D-shaped embedded helical bellow - Google Patents
D-shaped embedded helical bellow Download PDFInfo
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- CN202868122U CN202868122U CN 201220005620 CN201220005620U CN202868122U CN 202868122 U CN202868122 U CN 202868122U CN 201220005620 CN201220005620 CN 201220005620 CN 201220005620 U CN201220005620 U CN 201220005620U CN 202868122 U CN202868122 U CN 202868122U
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- metal pipe
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Abstract
The utility model relates to a D-shaped embedded helical bellow which can not only improve the strength of a large-caliber bellow effectively, but also cause the elasticity of the large-caliber bellow to be improved fundamentally. The D-shaped riveting helical bellow comprises an inner pipe; a metal pipe is wound on the pipe body of the inner pipe; the section of the metal pipe adopts a structure with an opening in the bottom; plastic on the wall of the inner pipe is embedded into the opening; a plurality of through holes are formed in the semi-circular surface of the D-shaped metal pipe; and a plastic layer is compounded on the pipe face of the D-shaped metal pipe, and is embedded into the through holes to form a pin head. The D-shaped embedded helical bellow has the advantages that firstly, the bottom surface of the D-shaped metal pipe is in surface contact with the surface of the inner pipe, so that when the D-shaped metal pipe is pressed, the pressure to the inner pipe is reduced greatly, and the supporting strength and the bearing capability of the inner pipe are improved greatly; and secondly, since plastic wedges are embedded in the through holes formed in the bottom surface of the D-shaped metal pipe in the length direction, the reliable compounding between the D-shaped metal pipe and the wall of the inner pipe is ensured; and fourth, a plastic rivet head cover is formed in the circular truncated cone holes in the D-shaped metal pipe, so that the phenomenon that the bellow is layered in use is avoided.
Description
Technical field
The utility model relates to a kind of heavy caliber bellows that can not only effectively improve to be strengthened, and can make the elasticity of heavy caliber bellows obtain the chimeric helical bellows of a kind of D shape that essence improves, and belongs to bellows and makes the field.
Background technique
CN201078525Y, title " steel strip enhancement polythene helical bellows of spigot-and-socket electric melting connecting type ", it is used for solving the problem of the easy seepage of steel band reinforced polyethylene spiral ripple pipe connection interface and poor reliability.Steel strip enhancement polythene helical bellows of spigot-and-socket electric melting connecting type, with outer layer polyethylene the metal frame that twines to be fixed on the inner layer polyethylene, particularly an end of bellows is provided with socket, and the other end of bellows is provided with bellmouth, imbeds a circle electric heating element on the bellmouth inwall and forms.Adopt this steel strip enhancement polythene helical bellows of spigot-and-socket electric melting connecting type, can be widely used in the connection construction of plastic tube.Its deficiency: the one, metal frame is the outer structure of taking off, what form with inner layer polyethylene is that the line face contacts, rather than face contact, not only plyability is poor, and under the effect of external force, metal frame is easily outer takes off movement, causes inner layer polyethylene is destroyed, the quality of direct shadow pipe matter, even cause inner layer polyethylene damaged; The 2nd, support strength is low, because metal frame is the outer structure of taking off, its metal frame both sides of external pressure are outwards mobile, not only cause the layering of metal frame and inner layer polyethylene, and cause the direct reduction of inner layer polyethylene intensity; The 3rd because outer layer polyethylene and metal frame are two kinds of different materials, be subjected to temperature to affect its coefficient that expands with heat and contract with cold different, so stratification in use occurs inevitably, cause bellows intensity sharply to descend, bellows caves in.
Summary of the invention
Purpose of design: avoid the deficiency in the background technique, design and a kind ofly can not only effectively improve heavy caliber bellows intensity, and can make the elasticity of heavy caliber bellows obtain the chimeric helical bellows of a kind of D shape that essence improves.
Design proposal: in order to realize above-mentioned purpose of design.1, the metal tube cross section is the design of D shape, is one of technical characteristics of the present utility model.The purpose of doing like this is: because D shape metal tube bottom surface opening is to open along D shape metal pipe range, be along long through-hole, supported on both sides limit in the middle of the formed pipe bottom surface, and along long through hole with the inner tube compound tense, enter along cooperating in the long through-hole and with suitable long through-hole formation clamping for the molten plastic of making on the inner tubal wall, both played the effect of limited support limit displacement, play again the rivet effect of riveted joint D shape metal tube, played again the effect of strengthening inner tube intensity simultaneously; Secondly, D shape metal tube is when being subject to the external force extruding, and D shape metal tube is neither outwards taken off and moved, and also can not move to inside contracting, and has guaranteed reliably compound between D shape metal tube and inner tubal wall.2, having the design that a plurality of through holes and through hole are inside trumpet shape on the semicircle face of D shape metal tube, is two of technical characteristics of the present invention.The purpose of doing like this is: because a plurality of through hole inside trumpet shape structures on the semicircle face of D shape metal tube, when molten plastic and the D shape metal semicircle that is furnished with a plurality of inside trumpet shape through holes form compound tense, the plastics of its melting externally enter a plurality of inside trumpet shape through holes and form with nail under the effect of pressure and cover continuously connected fastener, and plastic layer and D shape metal tube face that this continuously connected fastener will be compounded on the D shape metal tube face firmly are connected as a single entity.
Technological scheme: a kind of D shape helical bellows, it comprises inner tube, be wrapped in metal tube cross section on the inner tube pipe shaft and be that plastics embed in the opening on the D shape structure of bottom opening and the inner tubal wall, have a plurality of through holes on the semicircle face of D shape metal tube and through hole is inside trumpet shape, the pipe face of D shape metal tube has plastic layer and plastic layer to embed to form ailhead in a plurality of through holes again.
The utility model is compared with background technique, and the one, D shape metal tube bottom surface and inner tube plane-plane contact are so that during D shape metal tube pressurized, greatly alleviated the pressure to inner tube, and D shape metal tube is just as the arch bridge structure, and bearing capacity is large, has greatly improved inner tube support strength and bearing capacity; The 2nd, because D shape metal tube bottom surface has through hole to be embedded with the plastics wedge along having grown, guaranteed reliably compound between D shape metal tube and inner tubal wall; The 3rd, owing to having a plurality of inside trumpet shape holes on the D shape metal tube face and being positioned at plastic layer on the D shape metal tube face at the melting compound tense, be injected in a plurality of inside trumpet shapes hole on the D shape metal tube face, form the Plastic Rivets headkerchief, plastic layer and D shape metal tube face that this Plastic Rivets headkerchief will be positioned on the D shape metal tube face firmly are connected as a single entity, and have guaranteed that bellows in use stratification can not occur.
Description of drawings
Fig. 1 is the structural representation of the chimeric helical bellows of D shape.
Fig. 2 is the cross section structure schematic diagram of D shape metal tube among Fig. 1.
Embodiment
Embodiment 1: with reference to accompanying drawing 1-2.A kind of D shape helical bellows, it comprises inner tube 1, be wrapped in metal tube 2 cross sections on inner tube 1 pipe shaft and be that plastics embed in the opening on the D shape structure of bottom opening and the inner tubal wall, have the area of a plurality of through holes 5 and through hole 5 close plastic layers on the D shape metal tube 2 semicircle faces less than being inside trumpet shape near via area, the pipe face of D shape metal tube 2 has plastic layer 3 and plastic layer to embed a plurality of through hole 5 interior formation ailheads again.Described D shape metal tube 2 bottom surface A/Fs are little 20 millimeters.Described opening refers to D shape metal tube length direction opening 4.Described D shape metal tube 2 adopts steel band to make.Its making method: adopt the metal tube producer that steel band is made the bottom and be the semicircle D shape metal tube of plane of the opening, then adopt the heavy caliber polyolefin of claimant's manufacturing to twine growth pipe production line in making bellows inner tube 1 process, embed in the opening of semicircle D shape pipe while the plastics of making the bellows inner tube, semicircle D shape pipe is wrapped on the bellows and on the corrugated pipe wall, adopt at last the heavy caliber polyolefin winding growth pipe production line of claimant's manufacturing that molten plastic is compounded on the semicircle D shape pipe.Have a plurality of through holes 5 on the described D shape metal tube 2 semicircle faces and through hole 5 is inside trumpet shape, because D shape metal tube 2 inwalls touch mutually with the inner tube melting, therefore the plastics of melting externally enter D shape metal tube under the effect of pressure in upper a plurality of inside trumpet shape through holes and form with nail and cover continuously connected fastener, and plastic layer and D shape metal tube face that this continuously connected fastener will be compounded on the D shape metal tube face firmly are connected as a single entity.
What need to understand is: although above-mentioned to the mentality of designing of the present utility model detailed text description of contrasting; but these text descriptions; just the simple text of the utility model mentality of designing is described; rather than to the restriction of the utility model mentality of designing; appoint Ke to be no more than the combination of the utility model mentality of designing; increase and modification, all fall in the protection domain of the present utility model.
Claims (3)
1. chimeric helical bellows of D shape, it comprises inner tube (1), it is characterized in that: be wrapped in metal tube (2) cross section on inner tube (1) pipe shaft and be that plastics embed in the openings (4) on the D shape structure of bottom opening and the inner tubal wall, have the area of the close plastic layer of a plurality of through holes (5) and through hole (5) on the semicircle face of D shape metal tube (2) less than being inside trumpet shape near via area, the pipe face of D shape metal tube (2) has plastic layer (3) and plastic layer to embed formation ailhead in a plurality of through holes (5) again.
2. the chimeric helical bellows of D shape according to claim 1, it is characterized in that: described D shape metal tube (2) bottom surface A/F is little 20 millimeters.
3. the chimeric helical bellows of D shape according to claim 1 and 2, it is characterized in that: described opening refers to D shape metal tube length direction shape port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220005620 CN202868122U (en) | 2012-01-09 | 2012-01-09 | D-shaped embedded helical bellow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220005620 CN202868122U (en) | 2012-01-09 | 2012-01-09 | D-shaped embedded helical bellow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202868122U true CN202868122U (en) | 2013-04-10 |
Family
ID=48034842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220005620 Expired - Fee Related CN202868122U (en) | 2012-01-09 | 2012-01-09 | D-shaped embedded helical bellow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202868122U (en) |
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2012
- 2012-01-09 CN CN 201220005620 patent/CN202868122U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20190109 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |