Steel lining polytetrafluoroethylene elbow pipe

Abstract

The utility model relates to the technical field of bent pipes, in particular to a steel lining polytetrafluoroethylene bent pipe which comprises a bent pipe body, the outer surface of the bent pipe body is sleeved with a first protective shell, the outer surface of the bent pipe body is sleeved with a second protective shell, and the first protective shell is located on the right side of the second protective shell. The side wall of the first protection shell is fixedly connected with a bolt, the side wall of the bolt is provided with a limiting groove, the side wall of the second protection shell is provided with an inserting groove, the inner wall of the inserting groove is provided with a moving groove, a limiting block is arranged in the moving groove, and the side wall of the limiting block is provided with an inclined groove. A threaded column is movably mounted at the inner bottom of the moving groove, and the outer surface of the threaded column is in threaded connection with a moving frame. According to the utility model, the structure is reasonable, the first protective shell and the second protective shell can be mounted and dismounted more conveniently and quickly, additional tools are not needed during replacement, the pipeline cannot be damaged, and the safety and the efficiency are higher.

Description

Technical Field

[0001] The utility model relates to the field of bent pipes, in particular to a steel-lined polytetrafluoroethylene bent pipe. Background Art

[0002] PTFE tubing is made from high-quality plunger extrusion, using a special processing technique to tightly bond steel and plastic tubing. It can withstand positive pressures of 1.6 MPa and negative pressures of 77 kPa. It can operate normally within a temperature range of -60°C to +260°C and has reliable and excellent corrosion resistance. It is suitable for transporting highly corrosive gases and liquids at high temperatures, a feature that cannot be replaced by other pipes.

[0003] During use, polytetrafluoroethylene (PTFE) pipes need to be covered with a protective jacket to protect them and extend their service life. Existing protective jackets are generally welded to the outer wall of the polytetrafluoroethylene (PTFE) pipe. This is very troublesome to replace when necessary, and cutting equipment is required, which is time-consuming and inconvenient. Cutting may also damage the pipe, which is not conducive to the protection of the polytetrafluoroethylene (PTFE) pipe. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a steel-lined polytetrafluoroethylene elbow.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a steel-lined polytetrafluoroethylene elbow, including a elbow body, the outer surface of the elbow body is provided with a first protective shell, the outer surface of the elbow body is provided with a second protective shell, the first protective shell is located on the right side of the second protective shell, the side wall of the first protective shell is fixedly connected with a pin, the number of the pins is multiple, the side wall of the pin is provided with a limiting groove, the side wall of the second protective shell is provided with a slot, the number of the slots is multiple, the inner wall of the slot is provided with a movable groove, a limiting block is provided inside the movable groove, the number of the limiting blocks is multiple, the side wall of the limiting block is provided with an oblique groove, the inner bottom of the movable groove is movably installed with a threaded column, the outer surface of the threaded column is threadedly connected to a movable frame, and a bayonet is fixedly connected between the inner walls of the movable frame, and the bayonet is located inside the oblique groove.

[0006] As a further description of the above technical solution:

[0007] A rotation groove is formed on the outer surface of the second protective shell, the threaded column is located inside the rotation groove, and a rotation bar is fixedly connected to the upper surface of the threaded column.

[0008] As a further description of the above technical solution:

[0009] The side wall of the elbow body is fixedly connected with a flange, and the number of the flanges is two.

[0010] As a further description of the above technical solution:

[0011] A sealing groove is provided on the outer surface of the flange, a sealing ring is fixedly connected to the inner surface of the sealing groove, and a plurality of bolt holes are provided on the outer wall of the flange.

[0012] As a further description of the above technical solution:

[0013] The inner surface of the curved pipe body is fixedly connected with reinforcing ribs, the number of the reinforcing ribs is three, and the reinforcing ribs are located on the inner surface of the curved arc of the curved pipe body.

[0014] As a further description of the above technical solution:

[0015] The elbow body is composed of a polytetrafluoroethylene lining and a steel pipe. The polytetrafluoroethylene lining is located in the inner layer of the elbow body, and the steel pipe is located in the outer layer of the elbow body.

[0016] The utility model has the following beneficial effects:

[0017] Compared with the prior art, this steel-lined polytetrafluoroethylene elbow is through the elbow body, the first protective shell, the limiting groove, the second protective shell, the slot, the latch, the limiting block, the pin, the threaded column, the movable frame and the rotating bar. When the first protective shell and the second protective shell need to be installed, the second protective shell is first put on the outer surface of the elbow body, and the rotating bar is twisted to drive the threaded column to rotate, which can control the movable frame and the pin to move up and down. When the movable frame and the pin move downward, due to the presence of the inclined groove, the adjacent limiting blocks will be close to each other, and the first protective shell can be put on the outer surface of the elbow body, so that the latch corresponds to the slot, so that the latch enters the inside of the slot until the first protective shell can no longer move. At this time, twisting the rotating bar to drive the threaded column to rotate in the opposite direction can drive the movable frame and the pin to move upward, which can drive the adjacent limiting blocks away from each other, so that the limiting blocks enter the limiting The first protective shell is limited inside the positioning groove, and the first protective shell and the second protective shell are installed. When the first protective shell and the second protective shell need to be removed, it is only necessary to twist the rotating bar to finally control the adjacent limit blocks to be close to each other to remove the first protective shell and the second protective shell. Compared with the existing bent pipe, during use, it is necessary to install a protective jacket on its surface to protect it to extend its service life. The existing protective jacket is generally set on the outer wall of the polytetrafluoroethylene tube by welding. It is very troublesome when it needs to be replaced, and cutting equipment must be brought to the operation, which is time-consuming and inconvenient. Cutting may also damage the pipeline, which is not conducive to the protection of the polytetrafluoroethylene tube. The steel-lined polytetrafluoroethylene bent pipe can install and remove the first protective shell and the second protective shell more conveniently and quickly. No additional tools are required for replacement, and the pipeline will not be damaged. It is safer and more efficient.

[0018] Compared with the existing technology, this steel-lined polytetrafluoroethylene elbow has reinforcing ribs, which can reduce the impact of the fluid on the elbow part when passing through the bend, and can also enhance the bearing capacity of the elbow part and reduce the probability of the elbow breaking and bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a steel-lined polytetrafluoroethylene elbow proposed in the utility model;

[0020] Figure 2 This is a cross-sectional view of the main structure of a steel-lined polytetrafluoroethylene elbow proposed in the utility model;

[0021] Figure 3 This is a structural diagram of the second protective shell of a steel-lined polytetrafluoroethylene elbow proposed in the utility model;

[0022] Figure 4 This is a structural diagram of the first protective shell of a steel-lined polytetrafluoroethylene elbow proposed in the utility model;

[0023] Figure 5 This is a cross-sectional view of the second protective shell structure of a steel-lined polytetrafluoroethylene elbow proposed in the utility model;

[0024] Figure 6 This utility model proposes a steel lined polytetrafluoroethylene elbow Figure 5 A magnified view of the structure at point A;

[0025] Figure 7 The utility model is a partial structural schematic diagram of a steel-lined polytetrafluoroethylene elbow.

[0026] Legend:

[0027] 1. Bend pipe body; 101. Polytetrafluoroethylene lining; 102. Steel pipe; 2. First protective shell; 3. Latch; 4. Limiting groove; 5. Second protective shell; 6. Slot; 7. Moving groove; 8. Limiting block; 9. Bevel groove; 10. Pin; 11. Threaded column; 12. Moving frame; 13. Rotating bar; 14. Rotating groove; 15. Flange; 16. Sealing groove; 17. Sealing ring; 18. Bolt hole; 19. Reinforcing rib. DETAILED DESCRIPTION

[0028] Reference Figure 1-7The utility model provides a steel-lined polytetrafluoroethylene elbow: it includes an elbow body 1, the outer surface of the elbow body 1 is provided with a first protective shell 2, the outer surface of the elbow body 1 is provided with a second protective shell 5, the first protective shell 2 is located on the right side of the second protective shell 5, the side wall of the first protective shell 2 is fixedly connected with a latch 3, the number of latches 3 is multiple, the side wall of the latch 3 is provided with a limiting groove 4, the side wall of the second protective shell 5 is provided with a slot 6, the number of slots 6 is multiple, the inner wall of the slot 6 is provided with a moving groove 7, the interior of the moving groove 7 is provided with a limiting block 8, the number of limiting blocks 8 is multiple, and the side wall of the limiting block 8 is provided with an oblique groove 9. When the first protective shell 2 and the second protective shell 5 need to be installed, the second protective shell 5 is first sleeved on the outer surface of the elbow body 1, twisting the rotating bar 13, thereby driving the threaded column 11 to rotate, and then the movable frame 12 and the latch 10 can be controlled to move up and down. When the movable frame 12 and the latch 10 move downward, due to the presence of the oblique groove 9, When the first protective shell 2 and the second protective shell 5 need not be removed, the first protective shell 2 and the second protective shell 5 can be removed. A threaded column 11 is movably installed on the inner bottom of the movable groove 7, and the outer surface of the threaded column 11 is threadedly connected to the movable frame 12. The inner wall of the movable frame 12 is fixedly connected with the latch 10, and the latch 10 is located inside the inclined groove 9.

[0029] A rotation groove 14 is provided on the outer surface of the second protective shell 5, and the threaded column 11 is located inside the rotation groove 14. A rotation bar 13 is fixedly connected to the upper surface of the threaded column 11. Twisting the rotation bar 13 can drive the threaded column 11 to rotate. The setting of the rotation bar 13 is to make it easier to twist the threaded column 11. A flange 15 is fixedly connected to the side wall of the elbow body 1. There are two flanges 15. A sealing groove 16 is provided on the outer surface of the flange 15. A sealing ring 17 is fixedly connected to the inner surface of the sealing groove 16. A bolt hole 18 is provided on the outer wall of the flange 15. There are multiple bolt holes 18. Adjacent elbow bodies 1 are connected through the flange 15 and are connected through bolts set in the bolt holes 18.

[0030] The inner surface of the elbow body 1 is fixedly connected with a reinforcing rib 19. The reinforcing rib 19 can reduce the impact of the fluid on the elbow part when passing through the bend, and can also enhance the bearing capacity of the elbow part and reduce the probability of the elbow breaking and bending. The number of reinforcing ribs 19 is three, and the reinforcing ribs 19 are located on the inner surface of the bend of the elbow body 1. The elbow body 1 is composed of a polytetrafluoroethylene liner 101 and a steel pipe 102. The polytetrafluoroethylene liner 101 is located in the inner layer of the elbow body 1, and the steel pipe 102 is located in the outer layer of the elbow body 1.

[0031] Working principle: When the first protective shell 2 and the second protective shell 5 need to be installed, the second protective shell 5 is first put on the outer surface of the elbow body 1, and the rotating bar 13 is twisted to drive the threaded column 11 to rotate, and then the movable frame 12 and the bayonet 10 can be controlled to move up and down. When the movable frame 12 and the bayonet 10 move downward, due to the presence of the inclined groove 9, the adjacent limit blocks 8 are brought close to each other, and then the first protective shell 2 can be put on the outer surface of the elbow body 1, so that the pin 3 corresponds to the slot 6, so that the pin 3 enters the interior of the slot 6 until The first protective shell 2 cannot move further. At this time, twisting the rotating bar 13 drives the threaded column 11 to rotate in the opposite direction, which can drive the movable frame 12 and the pin 10 to move upward, and then drive the adjacent limit blocks 8 to move away from each other, so that the limit blocks 8 enter the interior of the limit groove 4. At this time, the first protective shell 2 is limited. At this time, the first protective shell 2 and the second protective shell 5 are installed. When the first protective shell 2 and the second protective shell 5 need to be removed, you only need to twist the rotating bar 13 to finally control the adjacent limit blocks 8 to move closer to each other to remove the first protective shell 2 and the second protective shell 5.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A steel-lined polytetrafluoroethylene elbow, comprising an elbow body (1), characterized in that: The outer surface of the bend pipe body (1) is provided with a first protective shell (2), and the outer surface of the bend pipe body (1) is provided with a second protective shell (5), the first protective shell (2) is located on the right side of the second protective shell (5), the side wall of the first protective shell (2) is fixedly connected with a latch (3), the number of the latch (3) is multiple, the side wall of the latch (3) is provided with a limiting groove (4), the side wall of the second protective shell (5) is provided with a slot (6), the number of the slot (6) is multiple, the inner wall of the slot (6) is provided with a movable groove (7), the interior of the movable groove (7) is provided with a limiting block (8), the number of the limiting blocks (8) is multiple, the side wall of the limiting block (8) is provided with an oblique groove (9), the inner bottom of the movable groove (7) is movably mounted with a threaded column (11), the outer surface of the threaded column (11) is threadedly connected with a movable frame (12), the inner walls of the movable frame (12) are fixedly connected with a bayonet (10), and the bayonet (10) is located inside the oblique groove (9).

2. The steel-lined polytetrafluoroethylene elbow according to claim 1, characterized in that: The outer surface of the second protective shell (5) is provided with a rotation groove (14), the threaded column (11) is located inside the rotation groove (14), and the upper surface of the threaded column (11) is fixedly connected to a rotation bar (13).

3. The steel-lined polytetrafluoroethylene elbow according to claim 1, characterized in that: The side wall of the elbow body (1) is fixedly connected with a flange (15), and the number of the flanges (15) is two.

4. The steel-lined polytetrafluoroethylene elbow according to claim 3, characterized in that: The outer surface of the flange (15) is provided with a sealing groove (16), the inner surface of the sealing groove (16) is fixedly connected with a sealing ring (17), and the outer wall of the flange (15) is provided with bolt holes (18), and the number of the bolt holes (18) is multiple.

5. The steel-lined polytetrafluoroethylene elbow according to claim 1, characterized in that: The inner surface of the curved pipe body (1) is fixedly connected with reinforcing ribs (19), the number of the reinforcing ribs (19) is three, and the reinforcing ribs (19) are located on the inner surface of the curved arc of the curved pipe body (1).

6. The steel-lined polytetrafluoroethylene elbow according to claim 1, characterized in that: The elbow body (1) is composed of a polytetrafluoroethylene lining (101) and a steel pipe (102), wherein the polytetrafluoroethylene lining (101) is located in the inner layer of the elbow body (1), and the steel pipe (102) is located in the outer layer of the elbow body (1).

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