CN214838986U

CN214838986U - Large-diameter PTFE spiral pipe

Info

Publication number: CN214838986U
Application number: CN202022344955.2U
Authority: CN
Inventors: 董过房
Original assignee: Zhaoqing High Tech Zone Dongshi Machinery Technology Co ltd
Current assignee: Zhaoqing High Tech Zone Dongshi Machinery Technology Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-11-23
Anticipated expiration: 2030-10-20

Abstract

The utility model belongs to the special type tubular product field discloses a heavy-calibre PTFE spiral pipe. The inner and outer surfaces of the large-diameter PTFE spiral pipe are spiral pipe walls, the outer diameter of each pipe wall is 20-200 mm, the wall thickness is 0.5-5 mm, the spiral depth is 1.0-5.0 mm, the screw pitch is 5-100 mm, and the angle between each spiral line and the transverse section of the pipe body is 10-60 degrees. The utility model discloses a PTFE spiral pipe adopts heavy-calibre, inside and outside to be the spiral, and the spiral line has great inclination (10 ~ 60) design, and the gained body can also overcome the defect of transmission resistance increase to a certain extent when keeping better bending property to have the effect of water conservancy diversion vortex, the transmission or the mixture of the big flux industrial gas of specially adapted or liquid material.

Description

Large-diameter PTFE spiral pipe

Technical Field

The utility model relates to a special type tubular product field specifically is a heavy-calibre PTFE spiral pipe.

Background

The Polytetrafluoroethylene (PTFE) spiral tube is a spiral corrugated hose which is made of polytetrafluoroethylene thin-wall tubing and rotates at a certain rotation speed in a special hot die. The PTFE spiral pipe is characterized by large flexibility and bending property, but not elasticity, which is significantly different from other materials such as common plastic or stainless steel corrugated pipes. The flexible connection device is mainly used for flexible connection of pipelines such as ceramic pipelines, graphite pipelines, glass pipelines and the like with strong corrosion resistance and low high-temperature mechanical strength, inlet and outlet pipes of vibration parts such as staggered connections, snake pipelines, pump engines and the like, low-temperature flexible pipelines, cable flexible sleeves and the like.

According to the current application situation, the PTFE spiral pipe for flexible connection is generally small in caliber, low in thread pitch and small in spiral angle, the spiral line is almost vertical to the central axis of the pipe, and products with outer diameters exceeding 50mm are rare, for example, patent CN2186839Y discloses a polytetrafluoroethylene corrugated hose assembly, the outer diameter of the hose is phi 10-phi 24mm, the inner diameter is phi 6.5-phi 20mm, the wall thickness is 0.65-1 mm, and the thread pitch is 3-6 mm, and the PTFE spiral pipe is mainly used for a pressure-resistant hose assembly of a hydraulic and air pressure system of an aircraft. At present, most of small-caliber PTFE spiral pipes adopt the design of smooth inner cavity and externally convoluted corrugation, and the main purpose is to reduce transmission resistance. However, there is a problem that thinning of the wall by the spiral depressed portion results in a decrease in strength, and is not suitable for transportation of industrial gas or liquid materials having a relatively large flux.

The plastic corrugated pipe with the large caliber is mainly applied to municipal water body transmission, the corrugation is basically arranged in an annular mode, namely, a corrugated line is parallel to the transverse section of the pipe body, the inner wall adopts a smooth or corrugated design, the strength cannot be taken into consideration in the smooth design of the inner wall, the transmission performance cannot be taken into consideration in the corrugated design of the inner wall and the undersize of the corrugation interval, and the plastic corrugated pipe is not suitable for transmission of corrosive and dangerous industrial gas or liquid materials.

SUMMERY OF THE UTILITY MODEL

To the problems existing in the prior art, the utility model aims to provide a large-diameter PTFE spiral pipe. The utility model discloses a heavy-calibre PTFE spiral pipe is applicable in the transmission of big flux industrial gas or liquid material, under the circumstances of guaranteeing better flexibility and bending property, has the transmission resistance who compares current PTFE spiral pipe lower and better service strength.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a heavy-calibre PTFE spiral pipe, is spiral pipe wall inside and outside including, the pipe wall external diameter is 20mm ~200mm, and the wall thickness is 0.5 ~ 5mm, and the spiral depth is 1.0~5.0mm, and the pitch is 5mm ~100mm, and the helix is 10 ~60 with the angle of body transverse cross section.

Preferably, in order to achieve better material conveying performance and be more suitable for conveying or mixing of large-flux industrial liquid materials, the screw pitch is 60-100 mm, and the screw pitch is not larger than the outer diameter of the pipe wall.

Further, a reinforcing material is wrapped outside the large-caliber PTFE spiral pipe. By way of example, the reinforcing material may be a stainless steel braided material or other reinforcing metallic or polymeric material or the like.

Further, unlike conventional spiral tubes in which the reinforcement material is embedded throughout the tube or in the spiral valleys, the reinforcement material of the present invention may be wrapped around only the spiral protrusions outside the spiral tube. The utility model discloses a heavy-calibre PTFE spiral pipe is because being the heavy-calibre, the design of pipe wall heliciform, its spiral depressed part is the same with the wall thickness of protruding portion or is different little in error range, its atress part is bigger in the protruding portion of pipe wall in the transmission process of large-traffic industrial gas or liquid material, it is different in spiral depressed part with the weak part of interior flat outer spiral pipe wall, consequently can show reinforcing spiral pipe bulk strength through wrapping up reinforcing material at the spiral protruding portion, do not influence the bending property of body simultaneously.

Furthermore, two ends of the large-caliber PTFE spiral pipe are smooth pipe walls. The smooth pipe walls at the two ends facilitate the installation and connection of the industrial pipelines, such as installation of flange connecting pieces and the like.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a PTFE spiral pipe adopts heavy-calibre, inside and outside the design that is the spiral, and the gained body has better bending property and intensity, applicable transmission in large-flux industrial gas or liquid material.

(2) Compare with the helix of general spiral pipe almost with the parallel design of body transverse section, the utility model discloses a PTFE spiral pipe's helix has great inclination (10 ~60 °), and adopts the coarse pitch setting (5mm ~100mm, more preferably 60mm ~100 mm), and above-mentioned design can overcome the defect that transmission resistance that is the design of spiral and brings by inside and outside increases to a certain extent. Meanwhile, the design of the spiral with large inclination angle inside and outside the pipe also has the effect of diversion vortex, and is particularly suitable for the transmission or mixing of large-flux industrial liquid materials.

(3) Different with general spiral pipe at spiral depressed part embedding reinforcing material, the utility model discloses a PTFE spiral pipe can adopt metal film or net package to twine the spiral protruding portion outside the tubes, can reach the effect that shows reinforcing body intensity. And compare and can cause the reduction of body bending property at spiral depressed part embedding reinforcing material, the utility model discloses a mode of spiral protruding portion reinforcing then can avoid this defect.

Drawings

Fig. 1 is an overall structural view of a large-diameter PTFE spiral pipe according to embodiment 1 of the present invention.

Fig. 2 is a longitudinal sectional view of a large-diameter spiral PTFE pipe according to embodiment 1 of the present invention.

Fig. 3 is an overall structural view of a large-diameter PTFE spiral pipe according to embodiment 2 of the present invention.

Detailed Description

Specific embodiments of the present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.

Example 1

As shown in fig. 1 and 2, the large-caliber PTFE spiral tube of the present embodiment includes a tube wall 1 which is spiral inside and outside, the outer diameter R of the tube wall is 100mm, the wall thickness is 4mm, the spiral depth h is 4mm, the pitch d is 60mm, and the angle a between the spiral line and the transverse section of the tube body is 20 °.

The two ends of the large-caliber PTFE spiral pipe are smooth pipe walls, and the smooth pipe walls at the two ends facilitate the installation and connection of industrial pipelines, such as installation of flange connecting pieces and the like.

Example 2

As shown in fig. 3, the large-caliber spiral PTFE pipe of this embodiment includes a pipe wall having a spiral shape inside and outside, and a spiral protrusion outside the spiral pipe is wrapped with a stainless steel woven mesh reinforcing material 2. The outer diameter R of the pipe wall is 100mm, the wall thickness is 4mm, the spiral depth h is 4mm, the thread pitch d is 60mm, and the angle A between the spiral line and the transverse section of the pipe body is 20 degrees.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. The utility model provides a heavy-calibre PTFE spiral pipe, is spiral helicine pipe wall inside and outside including, its characterized in that: the outer diameter of the pipe wall is 20 mm-200 mm, the wall thickness is 0.5 mm-5 mm, the spiral depth is 1.0 mm-5.0 mm, the thread pitch is 5 mm-100 mm, and the angle between the spiral line and the transverse section of the pipe body is 10 degrees-60 degrees;

the large-caliber PTFE spiral pipe is externally wrapped with a reinforcing material, and the reinforcing material is wrapped on the spiral protruding part outside the spiral pipe.

2. A spiral pipe of large-caliber PTFE as claimed in claim 1, wherein: the pitch is 60 mm-100 mm, and the pitch is not larger than the outer diameter of the pipe wall.

3. A spiral pipe of large-caliber PTFE as claimed in claim 1, wherein: the reinforcing material is a reinforced metal material or a polymer material.

4. A spiral pipe of large-caliber PTFE as claimed in claim 1, wherein: the two ends of the large-caliber PTFE spiral pipe are smooth pipe walls.