Breakage-proof PTFE (Polytetrafluoroethylene) lining PTFE pipe fitting

Abstract

The utility model discloses a breakage-proof PTFE (polytetrafluoroethylene) lining PTFE pipe fitting, which relates to the technical field of PTFE lining PTFE pipe fittings, and comprises an outer pipe, an inner pipe is arranged in the outer pipe, the periphery of the inner pipe is fixedly connected with a spiral metal support arm, and the periphery of the metal support arm is contacted with the inner wall of the outer pipe; linings are fixedly connected to the two sides of the inner wall of the inner pipe, two cavities are formed between the inner wall of the inner pipe and the outer walls of the two linings, and a plurality of connecting strips are fixedly connected to the interiors of the cavities and are annularly distributed. According to the utility model, the metal supporting arms provide extra supporting force for the inner pipe, and uniformly disperse pressure to the whole pipe structure, so that the deformation or damage of the inner pipe caused by external pressure is effectively prevented, the overall compressive property of the pipe is improved, and the overall stability of the pipe is improved; meanwhile, the spiral structure of the metal supporting arm can absorb or compensate axial thermal expansion deformation, the inner pipe is allowed to stretch out and draw back freely and does not fall off, and displacement or deformation caused by external force is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to PTFE lining tetrafluoro pipe fitting technical field, especially in kind of PTFE lining tetrafluoro pipe fitting of preventing damage. BACKGROUND

[0002] PTFE lining tetrafluoro pipe fitting, usually by metal matrix and PTFE lining is composed of. Metal matrix generally adopts carbon steel, stainless steel etc. material, provides mechanical strength and rigidity for pipe fitting, to bear the pressure, tension and external force in the pipeline system. PTFE lining is closely attached on the inner wall of metal matrix through specific process (such as mould pressing, winding, spraying etc.), forms a continuous, smooth protective layer.

[0003] The existing PTFE lining tetrafluoro pipe fitting, usually lining does not have additional support, pressure can not be evenly dispersed to the whole pipe fitting, lining has the risk of deformation or damage due to pressure, reduces the overall pressure resistance of pipe fitting, makes the overall structure of pipe fitting not enough stable, simultaneously when lining meets hot fluid expansion, has the risk of expansion and falling off, leads to lining displacement and deformation due to external force.

[0004] Therefore, it is necessary to provide a kind of PTFE lining tetrafluoro pipe fitting of preventing damage to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of PTFE lining tetrafluoro pipe fittings to prevent damage, to solve lining does not have additional support, pressure can not be evenly dispersed to the whole pipe fitting, lining has the risk of deformation or damage due to pressure, reduces the overall pressure resistance of pipe fitting, makes the overall structure of pipe fitting not enough stable, simultaneously when lining meets hot fluid expansion, has the risk of expansion and falling off, leads to lining displacement and deformation due to external force.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of PTFE lining tetrafluoro pipe fitting of preventing damage, including outer tube, the inner tube is arranged in the outer tube, and the metal support arm is fixedly connected on the outer periphery of inner tube, the metal support arm is spiral, and the outer periphery of metal support arm is in contact with the inner wall of outer tube;

[0007] The inner wall of inner tube is fixedly connected with lining on both sides, and two cavities are arranged between the inner wall of inner tube and the outer wall of two linings, a plurality of connection strips are fixedly connected in the cavity, and the plurality of connection strips are distributed in ring.

[0008] Preferably, the connection strip has elasticity.

[0009] Preferably, the metal support arm has multi-dimensional flexibility.

[0010] Preferably, two said inner lining top and bottom are provided with a slot, the slot is provided with an electric heating wire, the slot is fixedly provided with a plurality of mounting pieces, and the mounting pieces are in contact with the electric heating wire.

[0011] Preferably, two said inner lining top is fixedly provided with a temperature sensor.

[0012] Preferably, the outer tube is provided with a limiting groove at both ends, the limiting groove is inserted with a limiting ring, and the two limiting rings are threadedly connected with both ends of the inner tube.

[0013] The technical effects and advantages of the present application are as follows:

[0014] 1. In the present application, the metal supporting arm provides additional support for the inner tube, evenly disperses the pressure to the entire pipe structure, effectively prevents deformation or damage of the inner tube caused by external pressure, improves the overall pressure resistance of the pipe, and improves the stability of the pipe.

[0015] 2. In the present application, the structure of the inner tube and the inner lining increases the strength of the pipe itself and enhances the corrosion resistance. At the same time, due to the arrangement of the connecting strip, the fluid pressure can be absorbed to prevent the inner tube from bulging.

[0016] 3. In the present application, the connecting strip can produce elastic deformation when vibration or impact occurs, converting part of the energy into its own elastic potential energy, reducing the influence of vibration and impact on the pipe, improving the stability and reliability of the pipe, and prolonging its service life.

[0017] 4. When high-temperature liquid flows in the inner tube, the high-temperature liquid causes the inner lining to expand outwardly, and the connecting strip deforms to buffer the stress generated by the thermal expansion of the inner lining, preventing the inner lining from being damaged due to excessive thermal stress and protecting the integrity of the pipe structure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 The present application is a structural schematic diagram.

[0019] Fig. 2 The present application is a first perspective view schematic diagram.

[0020] Fig. 3 The present application is a second perspective view schematic diagram.

[0021] In the figure: 1, outer tube; 11, limiting groove;

[0022] 2, inner tube; 21, metal supporting arm; 22, inner lining; 23, cavity; 24, connecting strip; 25, slot; 26, limiting ring;

[0023] 3. heating wire; 31. temperature sensor; 32. mounting piece. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the utility model will be clearly and completely described below in combination with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments, and they should not be understood as limiting the utility model. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the protection scope of the utility model. In the description of the utility model, it is understood that the used terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0025] The utility model solves the problem that the inner lining has no additional supporting force, the pressure cannot be evenly dispersed to the whole pipe, the inner lining has the risk of deformation or damage caused by pressure, reduces the overall pressure resistance of the pipe, makes the overall structure of the pipe not stable enough, and at the same time, when the inner lining encounters hot fluid expansion, there is the risk of expansion and falling off, which leads to the displacement and deformation of the inner lining caused by external force. Figs. 1-3 As shown in a kind of anti-damage PTFE lining tetrafluoro pipe, including outer tube 1, outer tube 1 inside is provided with inner tube 2, inner tube 2 periphery is fixedly connected with metal support arm 21, metal support arm 21 is spiral, metal support arm 21 periphery and outer tube 1 inner wall contact;Pipe in use, when encountering high temperature hot fluid, the spiral setting of metal support arm 21 can absorb or compensate axial thermal expansion deformation, allow inner tube 2 freely expand without falling off.

[0026] Metal support arm 21 provides additional support for inner tube 2, evenly disperses pressure to the whole pipe structure, effectively prevents deformation or damage of inner tube 2 caused by external pressure, improves the overall pressure resistance of the pipe, improves the stability of the whole pipe, and the spiral structure of metal support arm 21 can absorb or compensate axial thermal expansion deformation, allow inner tube 2 freely expand without falling off, reduce displacement or deformation caused by external force.

[0027] Further, inner tube 2 inner wall both sides are fixedly connected with inner lining 22, two cavities 23 are arranged between inner tube 2 inner wall and the outer wall of two inner linings 22, a plurality of connecting strips 24 are fixedly connected in the cavities 23, and the plurality of connecting strips 24 are distributed in ring. Connecting strip 24 connects inner tube 2 and inner lining 22 together, enhances the bonding force between the two layers, the structure of inner tube 2 and inner lining 22, increases the strength of the pipe itself, and also enhances the corrosion resistance.

[0028] When the high-temperature liquid flows inside the inner tube 2, the high-temperature liquid makes the inner liner 22 heat and expand outward, the connecting strip 24 deforms to buffer the stress generated by the thermal expansion of the inner liner 22, and prevent the inner liner 22 from being damaged due to excessive thermal stress, and protect the structural integrity of the pipe fitting.

[0029] In the utility model, the connecting strip 24 is elastic; the elastic setting of the connecting strip 24 can deform elastically when vibration or impact occurs, and reduce the influence of vibration and impact on the inner tube 2.

[0030] Further, the metal supporting arm 21 is multi-dimensionally flexible; it can adapt to the size change of the inner tube 2 due to thermal expansion and cold shrinkage to a certain extent, and when the temperature rises, the metal supporting arm 21 can accommodate the expansion of the inner tube 2 by deforming itself; when the temperature decreases, it can avoid excessive restraint on the inner tube 2, thereby reducing the risk of pipe fitting damage caused by thermal stress.

[0031] The connecting strip 24 can deform elastically when vibration or impact occurs, convert part of the energy into its own elastic potential energy, reduce the influence of vibration and impact on the pipe fitting, improve the stability and reliability of the pipe fitting, and prolong its service life.

[0032] In the utility model, the two inner liners 22 are fixedly provided with temperature sensors 31 at the top; the temperature sensors 31 can detect the fluid in the pipe fitting.

[0033] It should be noted that the two inner liners 22 are provided with grooves 25 between the top and the bottom, the grooves 25 are provided with electric heating wires 3 inside, the grooves 25 are fixedly provided with a plurality of mounting pieces 32 inside, the mounting pieces 32 are in contact with the electric heating wires 3; the grooves 25 can heat the fluid in the pipeline to prevent the fluid in the pipeline from freezing, and when the temperature of the fluid in the pipeline is too low, the grooves 25 are opened to heat the fluid.

[0034] It should be noted that the electric heating wires 3 pass through the inner tube 2 and the outer tube 1 and are connected with the external power supply.

[0035] In the utility model, the outer tube 1 is provided with limiting grooves 11 at both ends, the limiting grooves 11 are inserted with limiting rings 26, and the two limiting rings 26 are threadedly connected with both ends of the inner tube 2; when the inner tube 2 is installed, the limiting ring 26 on one side is rotatably installed at the end of the inner tube 2, then the inner tube 2 is inserted into the outer tube 1, the limiting ring 26 is clamped to the limiting groove 11 on one side, and the user installs the limiting ring 26 on the other side to complete the installation of the inner tube 2.

Claims

1. A tamperproof PTFE lined tube fitting comprising an outer tube (1) characterised in that: The outer tube (1) is internally provided with an inner tube (2), the outer periphery of the inner tube (2) is fixedly connected with a metal supporting arm (21), the metal supporting arm (21) is spiral-shaped, and the outer periphery of the metal supporting arm (21) is in contact with the inner wall of the outer tube (1); The inner wall of the inner tube (2) is fixedly connected with two inner linings (22) on both sides, two cavities (23) are arranged between the inner wall of the inner tube (2) and the outer walls of the two inner linings (22), a plurality of connecting strips (24) are fixedly connected inside the cavities (23), and the plurality of connecting strips (24) are distributed in a ring shape.

2. A tamperproof PTFE lined tube fitting according to claim 1, wherein: The connecting strip (24) has elasticity.

3. A tamperproof PTFE lined tube fitting according to claim 1, wherein: The metal supporting arm (21) has multi-dimensional flexibility.

4. A tamperproof PTFE lined tube fitting according to claim 1 wherein: The top and the bottom of the two inner linings (22) are both provided with a slot (25), an electric heating wire (3) is arranged inside the slot (25), a plurality of mounting pieces (32) are fixedly installed inside the slot (25), and the mounting pieces (32) are in contact with the electric heating wire (3).

5. A tamperproof PTFE lined tube fitting according to claim 1 wherein: Temperature sensors (31) are fixedly installed on the top of the two inner linings (22).

6. A tamperproof PTFE lined tube fitting according to claim 1 wherein: The outer tube (1) is provided with a limiting groove (11) at both ends, the limiting groove (11) is inserted with a limiting ring (26), and the two limiting rings (26) are respectively threadedly connected with both ends of the inner tube (2).

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