Corrosion-resistant loose lining polytetrafluoroethylene pipe fitting

Abstract

The corrosion-resistant loose lining polytetrafluoroethylene pipe fitting comprises a pipe body, a polytetrafluoroethylene lining layer is arranged in the pipe body, a flange plate is detachably connected to one side of the pipe body, filter plates are arranged on the opening portions of the two sides of the flange plate, and the two filter plates are clamped to the opening portions of the corresponding sides of the flange plate through clamping pieces. By means of the arrangement of the polytetrafluoroethylene lining layer, the pipe body is effectively protected against fluid corrosion, the service life of the pipe fitting is prolonged, the filter plates are arranged on the opening portions of the two sides of the flange plate, the fluid passing through the pipe fitting can be filtered, impurities can be intercepted, and the sealing performance of the pipe fitting is improved. Impurities are prevented from entering subsequent pipelines or equipment, and the problems of blockage, abrasion and the like caused by the impurities are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of loose-lined pipes, in particular to a corrosion-resistant loose-lined polytetrafluoroethylene pipe fitting. Background Art

[0002] In chemical production, many pipelines need to transport highly corrosive chemicals, such as various acids, alkalis, and salt solutions. The lining materials in loose-lined pipe fittings mostly have excellent chemical stability and can resist the erosion of these corrosive media, effectively protecting the metal shell of the pipe fittings, extending the service life of the pipe fittings, and ensuring the safe and stable operation of the chemical pipeline system.

[0003] At present, a Chinese patent with announcement number CN219775173U discloses a wear-resistant lined filter pipe fitting, which relates to the field of pipe fitting technology. The pipes include an anti-corrosion layer, a steel pipe layer and a wear-resistant lining layer from the outside to the inside. A matching flange is provided at each pipe end. The two pipes are connected through the matching flanges, and an intermediate flange is clamped between the two connected matching flanges. Two filter screens are symmetrically and removably provided on the inner wall of the intermediate flange. By providing matching flanges at the ends of the pipes, an intermediate flange is provided between the two matching flanges, and two filter screens are symmetrically provided on the inner wall of the intermediate flange, it is convenient to remove the intermediate flange and remove the filter screen from the intermediate flange, so as to facilitate cleaning or replacement of the outer and inner sides of the filter screen.

[0004] The above-mentioned wear-resistant lined filter pipe has some problems in use. Although it is convenient to remove the middle flange to facilitate cleaning or replacement of the outside and inside of the filter screen, both filters are in an arc shape protruding outward. When removing them, the removal angle of the middle flange is incorrect, causing the middle flange to tilt to one side. The protruding part of the filter screen can easily get stuck in the pipe mouth, and if you are not careful, it can easily cause the filter screen to be damaged. Utility Model Content

[0005] The purpose of the utility model is to provide a corrosion-resistant loose-lined polytetrafluoroethylene pipe fitting to solve the problem that the two filter screens proposed in the above-mentioned background technology are both arc-shaped and protrude outward. When taking them out, the taking-out angle of the middle flange is incorrect, causing the middle flange to tilt to one side. The protruding part of the filter screen is easily stuck in the pipe mouth, which can easily cause the filter screen to be damaged if not paid attention to.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A corrosion-resistant loose-lined polytetrafluoroethylene pipe fitting comprises a pipe body, a polytetrafluoroethylene lining layer is provided inside the pipe body, a flange is detachably connected to one side of the pipe body, filter plates are provided on both side openings of the flange, two groups of filter plates are clamped to the corresponding side openings of the flange through clamping parts, and both side openings of the flange are provided with limiting parts for limiting the filter plates.

[0008] Preferably, the inner wall of the tube body is fixedly connected with a spirally arranged protrusion, the outer wall of the PTFE lining layer is provided with an inwardly recessed groove that matches the protrusion, and the PTFE lining layer is fixedly installed on the inner wall of the tube body through the cooperation of the groove and the protrusion.

[0009] Preferably, the water inlet end of the polytetrafluoroethylene lining layer is provided with a folded edge, and the folded edge extends the tube wall of the tube body and extends outward at the same time.

[0010] Preferably, the limiting member includes connecting plates respectively arranged on the mouths of both sides of the flange, the facing sides of the two groups of filter plates are in contact with the surfaces of the corresponding side connecting plates, and the four corners of the two groups of connecting plates are fixedly connected with fixing rings, and clamping grooves are provided on both sides of the flange and at positions corresponding to the fixing rings. The four groups of fixing rings are respectively clamped in the inside of the clamping grooves at the corresponding positions, and the inside of the four groups of fixing rings are respectively inserted with first bolts, and the four groups of the first bolts respectively penetrate the inner cavity of the fixing rings at the corresponding positions and are threadedly connected to the inside of the clamping grooves at the corresponding positions.

[0011] Preferably, the clamping parts include positioning columns fixedly installed on both sides of the filter plate, and positioning grooves are provided on both side ends of the flange and at positions corresponding to the positioning columns. The two groups of positioning columns on the same side are respectively clamped in the inner cavity of the corresponding side positioning grooves.

[0012] Preferably, reinforcing plates are fixedly connected to the middle of both sides of the connecting plate, and the facing ends of the two groups of reinforcing plates extend to positions corresponding to the corresponding side positioning grooves and are fixedly connected with limiting plates, which are respectively clamped in the inner cavities of the positioning grooves at the corresponding positions.

[0013] Preferably, nuts are embedded in the middle of the two groups of filter plates respectively, and second bolts are inserted in the middle of the two groups of connecting plates. One end of the second bolt passes through the corresponding side connecting plate and is threadedly connected to the inner cavity of the corresponding side nut.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model effectively protects the pipe body from fluid corrosion and extends the service life of the pipe fittings by setting a PTFE lining layer. Filter plates are set on both sides of the flange to filter the passing fluid, intercept impurities, and prevent impurities from entering subsequent pipelines or equipment, reducing problems such as blockage and wear caused by impurities. At the same time, the flange can be disassembled, which is convenient for staff to regularly disassemble the flange and clean the filter plates.

[0016] 2. The utility model provides a stable support and fitting plane for the filter plate through the setting of the limiter, so that the filter plate can maintain a flat and stable position after installation, which is conducive to uniform filtration of the fluid and prevents the filter plate from being deformed or damaged due to uneven force. When the flange is removed, the connecting plate protects the filter plate. When the flange is tilted, the lower mouth of the pipe contacts the surface of the connecting plate, avoiding direct contact with the surface of the filter plate, which may cause damage to the filter plate.

[0017] 3. The utility model gradually inserts the PTFE lining layer into the pipe body along the axial direction of the pipe body through the arrangement of protrusions and grooves, so that the grooves on the outer wall of the PTFE lining layer are accurately aligned with the protrusions on the inner wall of the pipe body, and then the PTFE lining layer is gently rotated so that the protrusions are gradually embedded in the grooves, thereby tightly connecting the PTFE lining layer and the pipe body, improving the structural integrity of the entire pipe fitting, reducing the possibility of problems such as fluid leakage or increased corrosion caused by loosening of the lining layer, and the spiral groove plays a certain diversion role for the fluid in the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the corrosion-resistant loose-lined PTFE pipe fitting of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the tube body of the utility model;

[0020] Figure 3 This is a schematic structural diagram of the polytetrafluoroethylene lining layer of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the flange of the utility model;

[0022] Figure 5 This is a structural diagram of the filter plate of the utility model.

[0023] In the figure: 100, tube body; 101, PTFE lining layer; 102, groove; 103, protrusion; 104, folded edge; 200, flange; 201, positioning groove; 202, snap-on groove; 300, fixing ring; 301, first bolt; 302, connecting plate; 303, second bolt; 304, reinforcing plate; 305, limiting plate; 400, filter plate; 401, positioning column; 402, nut. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-5 , This embodiment provides a corrosion-resistant loose-lined PTFE pipe fitting, including a pipe body 100. The interior of the pipe body 100 is fixed with a PTFE lining layer 101 in a loose lining manner to form a continuous anti-corrosion layer. The PTFE lining layer 101 has excellent corrosion resistance and can resist the erosion of various corrosive media, thereby enhancing the corrosion resistance and service life of the pipe fitting. A flange 200 is detachably connected to one side of the pipe body 100. Filter plates 400 are provided on both sides of the flange 200. The two groups of filter plates 400 are respectively in an arc shape convex to the outside. The two groups of filter plates 400 are clamped to the corresponding side openings of the flange 200 by clamping parts. Both sides of the flange 200 are provided with limiters for limiting the filter plate 400. It is worth mentioning that the PTFE lining layer 101 is made of polytetrafluoroethylene. The setting of the PTFE lining layer 101 effectively protects the pipe body 100 from fluid corrosion, thereby extending the service life of the pipe fittings. In addition, filter plates 400 are set at the two sides of the flange 200, which can filter the passing fluid, intercept impurities, and prevent impurities from entering subsequent pipelines or equipment, thereby reducing problems such as blockage and wear caused by impurities. At the same time, the flange 200 can be disassembled, which is convenient for the staff to regularly disassemble the flange 200 and clean the filter plate 400.

[0026] The detachable connection between the pipe body 100 and the flange 200 is a well-known technical means in the technical field and will not be described in detail here.

[0027] Furthermore, the inner wall of the tube body 100 is fixedly connected with a spirally arranged protrusion 103, and the outer wall of the polytetrafluoroethylene lining layer 101 is provided with a groove 102 which is concave inward and adapted to the protrusion 103. The polytetrafluoroethylene lining layer 101 is fixedly installed on the inner wall of the tube body 100 through the cooperation of the groove 102 and the protrusion 103. By setting the protrusion 103 and the groove 102, the polytetrafluoroethylene lining layer 101 is gradually inserted into the tube body 100 along the axial direction of the tube body 100, so that the polytetrafluoroethylene lining layer 101 is fixedly installed on the inner wall of the tube body 100. The groove 102 on the outer wall of the lining 101 is accurately aligned with the protrusion 103 on the inner wall of the pipe body 100, and then the polytetrafluoroethylene lining 101 is gently rotated so that the protrusion 103 is gradually embedded in the groove 102, thereby tightly connecting the polytetrafluoroethylene lining 101 and the pipe body 100, improving the structural integrity of the entire pipe fitting, reducing the possibility of problems such as fluid leakage or increased corrosion caused by loosening of the lining layer, and the spiral groove 102 plays a certain diversion role for the fluid in the pipe.

[0028] Furthermore, the water inlet end of the PTFE lining layer 101 is provided with a folded edge 104, which extends the tube wall of the tube body 100 and extends outward at the same time. Through the setting of the folded edge 104, the PTFE lining layer 101 is limited to prevent the PTFE lining layer 101 from being screwed into the tube body 100 too much.

[0029] It is worth noting that the limiting parts include connecting plates 302 respectively arranged on the mouths of both sides of the flange 200, the facing sides of the two groups of filter plates 400 are in contact with the surfaces of the corresponding side connecting plates 302, and the four corners of the two groups of connecting plates 302 are respectively fixedly connected with fixing rings 300, and the positions on both sides of the flange 200 and corresponding to the fixing rings 300 are provided with snap-fitting grooves 202, and the four groups of fixing rings 300 are respectively snap-fitted into the inside of the snap-fitting grooves 202 at the corresponding positions, and the inside of the four groups of fixing rings 300 are respectively inserted with first bolts 301, and the four groups of first bolts 301 respectively penetrate the inner cavity of the fixing rings 300 at the corresponding positions and The threaded connection is to the inside of the corresponding position snap-in groove 202, and the setting of the limiter provides a stable support and fitting plane for the filter plate 400, so that the filter plate 400 can maintain a flat and stable position after installation, which is conducive to uniform filtration of the fluid. At the same time, it can prevent the filter plate 400 from being deformed or damaged due to uneven force, and when the flange 200 is removed, the connecting plate 302 protects the filter plate 400. When the flange 200 is tilted, the lower mouth of the pipe contacts the surface of the connecting plate 302, avoiding direct contact with the surface of the filter plate 400, which may cause damage to the filter plate 400.

[0030] It is worth noting that the clamping parts include positioning columns 401 fixedly installed on both sides of the filter plate 400, and positioning grooves 201 are provided on both side ends of the flange 200 and at positions corresponding to the positioning columns 401. The two groups of positioning columns 401 on the same side are respectively clamped in the inner cavity of the positioning grooves 201 on the corresponding sides. Through the setting of the positioning columns 401 and the positioning grooves 201, the positioning columns 401 on both sides of the filter plate 400 cooperate with the positioning grooves 201 on both side ends of the flange 200 to achieve precise positioning of the filter plate 400, and can quickly and accurately install the filter plate 400 to the correct position, while limiting the translation and rotation of the filter plate 400 in the plane, so that the filter plate 400 can remain stable when subjected to fluid impact and vibration.

[0031] Preferably, reinforcing plates 304 are fixedly connected to the middle of both sides of the connecting plate 302, and the facing ends of the two groups of reinforcing plates 304 extend to the positions corresponding to the corresponding side positioning grooves 201 and are fixedly connected with limiting plates 305, and the limiting plates 305 are respectively clamped in the inner cavities of the positioning grooves 201 at the corresponding positions. Through the setting of the limiting plates 305, the limiting plates 305 on one side of the reinforcing plate 304 will be clamped in the positioning grooves 201 at the corresponding positions as the fixing of the connecting plate 302 is completed, and the positioning columns 401 pre-clamped in the inner cavity of the positioning grooves 201 are further limited to prevent the filter plate 400 from detaching from the inside of the flange 200.

[0032] Furthermore, nuts 402 are respectively embedded in the middle of the two groups of filter plates 400, and second bolts 303 are inserted in the middle of the two groups of connecting plates 302. One end of the second bolt 303 passes through the corresponding side connecting plate 302 and is threadedly connected to the inner cavity of the corresponding side nut 402. Through the setting of the second bolt 303, the second bolt 303 passes through the connecting plate 302 and is threadedly connected to the nut 402 embedded in the middle of the filter plate 400, which further strengthens the connection between the filter plate 400 and the connecting plate 302 from the middle position, and can better maintain the integrity with the connecting plate 302, avoiding the separation or damage of the filter plate 400 and the connecting plate 302 due to excessive local force.

[0033] Working principle;

[0034] First, fix the pipe at the required installation position. Then, take out the PTFE lining layer 101 and gradually insert the PTFE lining layer 101 into the pipe body 100 along the axial direction of the pipe body 100, so that the groove 102 on the outer wall of the PTFE lining layer 101 is accurately aligned with the protrusion 103 on the inner wall of the pipe body 100. Then, gently rotate the PTFE lining layer 101 so that the protrusion 103 is gradually embedded in the groove 102, thereby tightly connecting the PTFE lining layer 101 to the pipe body 100.

[0035] Subsequently, align the side of the filter plate 400 with the positioning column 401 with the positioning groove 201 opened on the corresponding side end of the flange 200, and accurately insert the positioning column 401 into the inner cavity of the positioning groove 201, thereby achieving the preliminary positioning of the filter plate 400 in terms of plane position and angle. At this time, align the fixing rings 300 at the four corners of the connecting plate 302 with the corresponding snap-fit ​​grooves 202 on the flange 200, so that the fixing rings 300 are embedded in the snap-fit ​​grooves 202. When the flange 200 is removed, the connecting plate 302 limits the filter plate 400 to prevent the flange 200 from tilting, causing the mouth of the pipe to contact the surface of the filter plate 400.

[0036] Furthermore, the first bolt 301 is passed through the inner cavity of the fixing ring 300 and threaded into the corresponding clamping groove 202. By tightening the first bolt 301, the tightening force of the first bolt 301 is utilized to enhance the tightness of the connection between the fixing ring 300 and the clamping groove 202. At this time, the second bolt 303 is inserted from the middle of the connecting plate 302 and threaded into the inner cavity of the corresponding side nut 402.

[0037] At the same time, the limiting piece 305 on one side of the reinforcing plate 304 will be snapped into the positioning groove 201 at the corresponding position as the connection plate 302 is fixed, further limiting the positioning column 401 pre-snapped in the inner cavity of the positioning groove 201.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant loose-lined PTFE pipe fitting, characterized in that: The invention comprises a tube body (100), wherein a polytetrafluoroethylene lining layer (101) is provided inside the tube body (100), a flange (200) is detachably connected to one side of the tube body (100), filter plates (400) are provided at both side openings of the flange (200), two groups of filter plates (400) are clamped to corresponding side openings of the flange (200) through clamping pieces, and both side openings of the flange (200) are provided with limiting pieces for limiting the filter plates (400).

2. A corrosion-resistant loose-lined polytetrafluoroethylene pipe fitting according to claim 1, characterized in that; The inner wall of the tube body (100) is fixedly connected with a helical protrusion (103), the outer wall of the polytetrafluoroethylene lining layer (101) is provided with an inwardly recessed groove (102) adapted to the protrusion (103), and the polytetrafluoroethylene lining layer (101) is fixedly mounted on the inner wall of the tube body (100) through the cooperation between the groove (102) and the protrusion (103).

3. The corrosion-resistant loose-lined polytetrafluoroethylene pipe fitting according to claim 2, characterized in that: The water inlet end of the polytetrafluoroethylene lining layer (101) is provided with a folded edge (104), and the folded edge (104) extends the tube wall of the tube body (100) and extends outward at the same time.

4. The corrosion-resistant loose-lined polytetrafluoroethylene pipe fitting according to claim 3, characterized in that: The limiting member comprises connecting plates (302) respectively arranged at the mouths of both sides of the flange (200); the facing sides of the two groups of filter plates (400) are in contact with the surface of the corresponding side connecting plates (302); the four corners of the two groups of connecting plates (302) are respectively fixedly connected with fixing rings (300); the two sides of the flange (200) and the positions corresponding to the fixing rings (300) are respectively provided with clamping grooves (202); the four groups of fixing rings (300) are respectively clamped in the inside of the clamping grooves (202) at the corresponding positions; the inside of the four groups of fixing rings (300) are respectively inserted with first bolts (301); the four groups of the first bolts (301) respectively penetrate the inner cavity of the fixing rings (300) at the corresponding positions and are threadedly connected to the inside of the clamping grooves (202) at the corresponding positions.

5. The corrosion-resistant loose-lined polytetrafluoroethylene pipe fitting according to claim 4, characterized in that: The clamping member comprises positioning posts (401) respectively fixedly mounted on both sides of the filter plate (400); positioning grooves (201) are provided at both ends of the flange (200) and at positions corresponding to the positioning posts (401); and two groups of the positioning posts (401) on the same side are respectively clamped in the inner cavities of the corresponding side positioning grooves (201).

6. The corrosion-resistant loose-lined polytetrafluoroethylene pipe fitting according to claim 5, characterized in that: Reinforcement plates (304) are fixedly connected to the middle of both sides of the connecting plate (302), and the facing ends of the two groups of reinforcement plates (304) respectively extend to positions corresponding to the corresponding side positioning grooves (201) and are fixedly connected to limiting plates (305), and the limiting plates (305) are respectively clamped in the inner cavities of the positioning grooves (201) at the corresponding positions.

7. The corrosion-resistant loose-lined polytetrafluoroethylene pipe fitting according to claim 6, characterized in that: The middle of the two groups of filter plates (400) are respectively inlaid with nuts (402), and the middle of the two groups of connecting plates (302) are both plugged with second bolts (303), one end of the second bolt (303) passes through the corresponding side connecting plate (302) and is threadedly connected to the inner cavity of the corresponding side nut (402).

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