A steel lined tetrafluoroelastomer elbow convenient to install

Abstract

The utility model discloses a kind of steel lining tetrafluoro elbow of being convenient for installation, including elbow pipe assembly and connecting disc, the right side of elbow pipe assembly is provided with connecting pipe one, the lower end of elbow pipe assembly is installed in connecting disc, and the inside of connecting disc is inlayed and connected with friction pad, the inside of friction pad is installed with fixed component, and fixed component and friction pad are inlayed and connected.The steel lining tetrafluoro elbow of being convenient for installation compared with existing steel lining tetrafluoro elbow, bolt is inserted into the flange connecting piece on connecting pipe one and connecting pipe two by connecting disc, the arc slot on connecting disc is conveniently aligned with the arbitrary position opening hole on flange connecting piece, without adjusting the relative position of connecting pipe one and connecting pipe two and elbow, bolt is fixed by nut, and by the appropriate interference screw is rotated into the lower part of bolt, prevent nut loosening, gasket is pressed to friction pad, the surface of friction pad and gasket is all roughened, increase friction, prevent relative position deviation, convenient for installation and fixation.

Description

Technical Field

[0001] This utility model relates to the technical field of PTFE-lined steel elbows, specifically a PTFE-lined steel elbow that is easy to install. Background Technology

[0002] PTFE-lined steel pipes are used for conveying highly corrosive gases and liquids at high temperatures. PTFE-lined steel pipes and fittings enjoy the reputation of being the "King of Plastics" due to their excellent temperature and corrosion resistance. They are ideal for transporting highly corrosive media such as nitric acid, sulfuric acid, hydrofluoric acid, phosgene, chlorine, aqua regia, mixed acids, bromides, and other organic solvents. PTFE-lined steel pipes and fittings can operate stably under extreme negative pressure conditions at high temperatures (up to 150℃) for extended periods, overcoming the previous limitation of PTFE-lined steel pipes and fittings being unable to withstand negative pressure. They have been widely used in many high-temperature, high-negative-pressure systems such as distillation.

[0003] When connecting PTFE-lined steel pipes, elbows are used, while PTFE-lined steel pipes are usually connected by flanges. The holes in the flange are fixed and need to be aligned with the holes on the elbow during installation. The elbow needs to be aligned with both PTFE-lined steel pipes at the same time. However, the relative positions of the two PTFE-lined steel pipes are different, which requires constant adjustment of the relative positions when maintaining or replacing the elbow, which is quite troublesome. Therefore, a PTFE-lined steel elbow that is easy to install is needed. Utility Model Content

[0004] The purpose of this invention is to provide a steel-lined PTFE elbow that is easy to install, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a steel-lined PTFE elbow that is easy to install, comprising a bending pipe assembly and a connecting plate. A connecting pipe is provided on the right side of the bending pipe assembly. The connecting plate is installed at the lower end of the bending pipe assembly, and a friction pad is embedded inside the connecting plate. A fixing component is installed inside the friction pad, and the fixing component and the friction pad are embedded together. A reinforcing block strengthens the connection between the steel pipe and the connecting plate.

[0006] Furthermore, the pipe bending assembly includes a steel pipe and an inner liner, with the inner liner installed on the inside of the steel pipe. The inner liner extends outward to cover the connection portion of the steel pipe, preventing corrosion at the connection point.

[0007] Furthermore, the fixing component includes a bolt and a washer, and the washer is installed on the upper periphery of the bolt. The washer is pressed onto the friction pad. The surfaces of both the friction pad and the washer are roughened to increase friction and prevent relative positional shift.

[0008] Furthermore, the fixing component also includes a nut and a screw. The lower outer end of the bolt is threaded with a nut, and the inner thread of the bolt is threaded with a screw. The bolt is fixed by the nut, and the screw is screwed into the lower part of the bolt with an appropriate interference fit to prevent the nut from loosening.

[0009] Furthermore, a reinforcing block is installed around the steel pipe, and the reinforcing block is welded to the steel pipe.

[0010] Furthermore, an insert ring is installed below the liner, and an insert groove is inlaid around the periphery of the insert ring. The insert ring of the connecting pipe is embedded in the insert groove on the upper right side of the liner.

[0011] Furthermore, a second connecting pipe is installed around the periphery of the groove, and the second connecting pipe and the groove are inlaid together, with the insert ring embedded in the groove inside the second connecting pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the inner lining extends outward to cover the connection part of the steel pipe, preventing corrosion at the connection point; the insert ring is embedded in the groove inside the second connecting pipe, and the insert ring of the first connecting pipe is embedded in the groove on the upper right side of the inner lining, improving the sealing performance at the connection point; the bolts are inserted into the flange connectors on the first and second connecting pipes through the connecting disc; the arc-shaped slot on the connecting disc facilitates alignment with any opening on the flange connector, eliminating the need to adjust the relative position of the first and second connecting pipes and the elbow; the bolts are fixed with nuts, and the screws with appropriate interference fit are screwed into the lower part of the bolts to prevent the nuts from loosening, resulting in better fixing effect; the gasket is pressed onto the friction pad, and the surfaces of both the friction pad and the gasket are roughened to increase friction, prevent relative position displacement, and facilitate installation and fixing;

[0013] 1. In this utility model, bolts are inserted into the flange connectors on connecting pipe one and connecting pipe two through a connecting disc. The arc-shaped slot on the connecting disc facilitates alignment with any opening on the flange connector. There is no need to adjust the relative position of connecting pipe one and connecting pipe two with the elbow. The bolts are fixed with nuts, and the lower part of the bolts is screwed in with an appropriate interference screw to prevent the nuts from loosening, resulting in a better fixing effect. The gasket is pressed onto the friction pad. The surfaces of both the friction pad and the gasket are roughened to increase friction, prevent relative position displacement, and facilitate installation and fixing.

[0014] 2. The inner lining of this utility model extends outward to cover the connection part of the steel pipe, preventing corrosion at the connection point. The insert ring is embedded in the groove inside the second connecting pipe, and the insert ring of the first connecting pipe is embedded in the groove on the upper right side of the inner lining, improving the sealing performance at the connection point. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a steel-lined PTFE elbow that is easy to install according to this utility model.

[0016] Figure 2This is a three-dimensional sectional view of a steel-lined PTFE elbow that is easy to install according to this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of a fixing component for a steel-lined PTFE elbow that is easy to install, according to this utility model.

[0018] In the diagram: 1. Bending assembly; 101. Steel pipe; 102. Liner; 2. Connecting pipe one; 3. Reinforcing block; 4. Connecting disc; 5. Friction pad; 6. Fixing assembly; 601. Bolt; 602. Washer; 603. Nut; 604. Screw; 7. Engraving ring; 8. Groove; 9. Connecting pipe two. Detailed Implementation

[0019] like Figure 1-3 As shown, an easy-to-install PTFE-lined steel elbow includes a bending assembly 1 and a connecting plate 4. A connecting pipe 2 is provided on the right side of the bending assembly 1. The connecting plate 4 is installed at the lower end of the bending assembly 1, and a friction pad 5 is embedded inside the connecting plate 4. A fixing assembly 6 is installed inside the friction pad 5, and the fixing assembly 6 is embedded in the friction pad 5. The fixing assembly 6 includes a bolt 601 and a washer 602, and the washer 602 is installed on the upper outer periphery of the bolt 601. The fixing assembly 6 also includes a nut 603 and a screw 604. The nut 603 is threaded to the lower outer periphery of the bolt 601, and the screw 604 is threaded to the inside of the bolt 601. A reinforcing block 3 is installed on the periphery of the steel pipe 101, and... The reinforcing block 3 is welded to the steel pipe 101. Bolts 601 are inserted into the flange connections on connecting pipe 1 (2) and connecting pipe 2 (9) through the connecting disc 4. The reinforcing block 3 strengthens the connection between the steel pipe 101 and the connecting disc 4. The arc-shaped slot on the connecting disc 4 facilitates alignment with any opening on the flange connection, eliminating the need to adjust the relative positions of connecting pipe 1 (2) and connecting pipe 2 (9) with the elbow. Bolts 601 are fixed with nuts 603, and screws 604 with appropriate interference fit are screwed into the lower part of bolts 601 to prevent nuts 603 from loosening, resulting in better fixing. Gasket 602 is pressed onto friction pad 5. Both friction pad 5 and gasket 602 have roughened surfaces to increase friction, prevent relative positional misalignment, and facilitate installation and fixing.

[0020] like Figure 1-3 As shown, the pipe bending assembly 1 includes a steel pipe 101 and an inner liner 102. The inner liner 102 is installed on the inner side of the steel pipe 101. An insert ring 7 is installed below the inner liner 102. An insert groove 8 is inlaid and connected to the outer periphery of the insert ring 7. A connecting pipe 2 9 is installed on the outer periphery of the insert groove 8. The connecting pipe 2 9 and the insert groove 8 are inlaid and connected. The inner liner 102 extends outward to cover the connection part of the steel pipe 101 to prevent corrosion at the connection of the steel pipe 101. The insert ring 7 is embedded in the insert groove 8 in the connecting pipe 2 9. The insert ring 7 of the connecting pipe 2 9 is embedded in the insert groove 8 on the upper right side of the inner liner 102 to improve the sealing of the connection.

[0021] Working principle: When using this easy-to-install PTFE-lined steel elbow, firstly, the inner liner 102 extends outward to cover the connection part of the steel pipe 101, preventing corrosion at the connection of the steel pipe 101. The insert ring 7 is embedded in the groove 8 inside the connecting pipe 2 9. The insert ring 7 of the connecting pipe 2 is embedded in the groove 8 on the upper right side of the inner liner 102, improving the sealing of the connection. The bolt 601 is inserted into the flange connection on the connecting pipe 2 and the connecting pipe 2 9 through the connecting disc 4. The reinforcing block 3 strengthens the connection between the steel pipe 101 and the connecting disc 4. For strength, the arc-shaped slot on the connecting plate 4 facilitates alignment with any opening on the flange connector, eliminating the need to adjust the relative positions of connecting pipe 1 2 and connecting pipe 2 9 with the elbow. The bolt 601 is fixed by the nut 603, and the lower part of the bolt 601 is screwed in with an appropriate interference screw 604 to prevent the nut 603 from loosening, resulting in better fixing. The gasket 602 is pressed onto the friction pad 5. Both the friction pad 5 and the gasket 602 have roughened surfaces to increase friction, prevent relative position displacement, and facilitate installation and fixing.

Claims

1. An easy-to-install steel-lined PTFE elbow, comprising a bend assembly (1) and a connecting disc (4), characterized in that, A connecting pipe (2) is provided on the right side of the bending pipe assembly (1). The connecting plate (4) is installed at the lower end of the bending pipe assembly (1), and a friction pad (5) is embedded inside the connecting plate (4). A fixing component (6) is installed inside the friction pad (5), and the fixing component (6) and the friction pad (5) are embedded together.

2. The easily installable PTFE-lined steel elbow according to claim 1, characterized in that, The pipe bending assembly (1) includes a steel pipe (101) and an inner liner (102), and the inner liner (102) is installed on the inner side of the steel pipe (101).

3. The easily installable PTFE-lined steel elbow according to claim 1, characterized in that, The fixing component (6) includes a bolt (601) and a washer (602), and the washer (602) is installed on the upper periphery of the bolt (601).

4. The easily installable PTFE-lined steel elbow according to claim 3, characterized in that, The fixing component (6) also includes a nut (603) and a screw (604). The lower outer end of the bolt (601) is threaded with a nut (603), and the inner thread of the bolt (601) is threaded with a screw (604).

5. The easily installable PTFE-lined steel elbow according to claim 2, characterized in that, The steel pipe (101) is surrounded by a reinforcing block (3), and the reinforcing block (3) is welded to the steel pipe (101).

6. The easily installable PTFE-lined steel elbow according to claim 2, characterized in that, A retaining ring (7) is installed below the liner (102), and a groove (8) is inlaid and connected to the periphery of the retaining ring (7).

7. The easily installable PTFE-lined steel elbow according to claim 6, characterized in that, A connecting pipe 2 (9) is installed around the groove (8), and the connecting pipe 2 (9) and the groove (8) are connected by an inlay.

Images