Steel lining polytetrafluoroethylene reinforced elbow for pipeline connection

Abstract

The utility model relates to the field of steel lining pipe elbow structures, in particular to a steel lining polytetrafluoroethylene reinforced elbow for pipeline connection, which comprises an elbow body, a flange piece and a connecting disc, the connecting disc is annular and is sleeved on the outer side of the elbow body, and a plurality of annularly distributed screws are fixedly connected to the inner bottom of the connecting disc. The top of the connecting disc is fixedly connected with a plurality of side arc-shaped pieces which are annularly distributed, and when the steel lining polytetrafluoroethylene reinforced elbow is connected and used, the side arc-shaped pieces are bent at intervals to form bent pieces and vertical pieces which are annularly distributed in a staggered mode. According to the steel lining polytetrafluoroethylene reinforced elbow, the connecting disc is arranged, the top of the connecting disc is fixedly connected with the side arc-shaped pieces which are annularly distributed, when the steel lining polytetrafluoroethylene reinforced elbow is connected and used, the side arc-shaped pieces are bent at intervals, the bent pieces and the vertical pieces which are annularly distributed in a staggered mode are formed, and the bent pieces clamp the two flanges; the connecting structure can act together with a screw structure, and the connecting strength between pipelines is improved.

Description

Technical Field

[0001] The utility model relates to the field of steel-lined pipe elbow structures, in particular to a steel-lined polytetrafluoroethylene reinforced elbow for pipeline connection. Background Art

[0002] Polytetrafluoroethylene material is a high-quality corrosion-resistant material and is widely used in the chemical industry to transport media. The steel-lined polytetrafluoroethylene pipeline is a steel pipe with a polytetrafluoroethylene liner installed inside it. It can fully utilize the structural strength of the steel pipe and the corrosion resistance of the polytetrafluoroethylene liner, and has a relatively broad application prospect.

[0003] When erecting a pipeline system, elbows are required. Since steel-lined polytetrafluoroethylene pipes are mainly used in corrosive liquids, the connection strength requirements for the elbows are relatively high. The conventional way to increase the connection strength is mainly to increase the number of bolts on the flange. The number of flange holes opened on the flange is relatively large, which will affect the overall strength of the flange. In addition, the number of bolts is relatively large, and installation and removal are relatively troublesome (the bolts need to be removed one by one). For this reason, the utility model provides a new type of steel-lined polytetrafluoroethylene reinforced elbow for pipeline connection. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides a steel-lined polytetrafluoroethylene reinforced elbow for pipeline connection.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a steel-lined polytetrafluoroethylene reinforced elbow for pipe connection, comprising:

[0006] The bent pipe body comprises a steel pipe and an inner lining pipe fixed inside the steel pipe, and the material of the inner lining pipe is polytetrafluoroethylene:

[0007] A flange, the flange is fixedly connected to the end of the bent pipe body, and the end of the flange is provided with a plurality of flange holes distributed in an annular manner;

[0008] A connecting plate, which is annular and has an L-shaped cross-section. The connecting plate is sleeved on the outside of the bent pipe body. The inner bottom of the connecting plate is fixedly connected with a number of annularly distributed screws. Each screw is equipped with a gasket and a nut. The screws correspond to the flange holes. The top of the connecting plate is fixedly connected with a number of annularly distributed side arc pieces. When the steel-lined polytetrafluoroethylene reinforced elbow is connected and used, the side arc pieces are bent at intervals to form annularly staggered distributed bent pieces and vertical pieces.

[0009] As a further description of the above technical solution:

[0010] The end of the liner pipe extends out of the central hole of the flange.

[0011] As a further description of the above technical solution:

[0012] The connecting disk comprises: a first semicircular portion and a second semicircular portion, wherein the first semicircular portion corresponds to the second semicircular portion and forms a complete ring.

[0013] As a further description of the above technical solution:

[0014] The number of the side arc-shaped pieces is twice the number of the screws, and the bent piece is located between two adjacent screws.

[0015] As a further description of the above technical solution:

[0016] An outer side of the curved pipe body is fixedly connected with an outer curved channel reinforcement piece, a side surface of the outer curved channel reinforcement piece is fixedly connected with a mounting piece, and a long slot hole is opened on the side surface of the mounting piece.

[0017] As a further description of the above technical solution:

[0018] The outer curve reinforcement is a 1CM thick steel plate, and the mounting part is an angle steel.

[0019] As a further description of the above technical solution:

[0020] The steel pipe comprises an arc section, and both ends of the arc section are fixedly connected with straight pipe sections.

[0021] The utility model has the following beneficial effects:

[0022] 1. Compared with the prior art, the steel-lined polytetrafluoroethylene reinforced elbow for pipe connection has an annular connecting plate structure, a plurality of screws are fixed to the connecting plate, and a plurality of annularly distributed side arc sheets are fixedly connected to the top of the connecting plate. When the steel-lined polytetrafluoroethylene reinforced elbow is connected and used, the side arc sheets are bent at intervals to form annularly staggered bent sheets and vertical sheets. The bent sheets clamp the two flanges and can work together with the screw structure to improve the connection strength between the pipes (elbows and straight pipes). Compared with the prior art, it has higher strength and does not require the arrangement of dense bolt groups.

[0023] 2. Compared with the prior art, this steel-lined polytetrafluoroethylene reinforced elbow for pipe connection, by setting the connecting plate to a ring shape and the cross section to an L shape, can cover the joint surface of the two flange parts when in use, thereby preventing external corrosion from affecting the flange parts, and making the device have a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1A three-dimensional diagram of a steel-lined polytetrafluoroethylene reinforced elbow for pipe connection proposed by the utility model;

[0025] Figure 2 A three-dimensional diagram of a connection fitting of a steel-lined polytetrafluoroethylene reinforced elbow for pipe connection proposed by the utility model;

[0026] Figure 3 The utility model provides a schematic diagram of connecting a steel-lined polytetrafluoroethylene reinforced elbow for pipeline connection and a steel-lined polytetrafluoroethylene straight pipe.

[0027] Legend:

[0028] 1. Bend pipe body; 101. Steel pipe; 102. Liner pipe; 2. Flange; 3. Flange hole; 4. Outer bend reinforcement; 5. Mounting part; 6. Long slot hole; 7. Connecting plate; 701. First semicircular part; 702. Second semicircular part; 8. Side arc piece; 801. Bent piece; 802. Vertical piece; 9. Screw; 10. Washer; 11. Nut. DETAILED DESCRIPTION

[0029] Reference Figure 1-Figure 3 The utility model provides a steel-lined polytetrafluoroethylene reinforced elbow for pipeline connection, which includes: a bent pipe body 1, a flange 2, and a connecting plate 7.

[0030] Among them, the bent pipe body 1 includes a steel pipe 101 and an inner lining pipe 102 fixed inside the steel pipe 101. The material of the inner lining pipe 102 is polytetrafluoroethylene. The steel pipe 101 has high strength, and the inner lining pipe 102 made of polytetrafluoroethylene has corrosion resistance. The composite steel-lined polytetrafluoroethylene has excellent performance.

[0031] The flange 2 is fixedly connected to the end of the elbow body 1, and the end of the flange 2 is provided with a plurality of flange holes 3 distributed in an annular manner, such as Figure 1 As shown in FIG, two flanges 2 are provided, which are respectively located at two ends of the bent pipe body 1, and the flanges 2 and the bent pipe body 1 are fixed by welding.

[0032] The connecting disk 7 is annular and has an L-shaped cross-section. The connecting disk 7 is sleeved on the outside of the bent pipe body 1. The inner bottom of the connecting disk 7 is fixedly connected with a plurality of annularly distributed screws 9. Each screw 9 is equipped with a gasket 10 and a nut 11. The screws 9 correspond to the flange holes 3. The top of the connecting disk 7 is fixedly connected with a plurality of annularly distributed side arc pieces 8. When the steel-lined polytetrafluoroethylene reinforced elbow is connected and used, the side arc pieces 8 are bent at intervals to form annularly staggered distributed bent pieces 801 and vertical pieces 802.

[0033] like Figure 1As shown in , a steel-lined polytetrafluoroethylene straight pipe is connected at the top, and the bent sheet 801 is pressed on the top of the flange of the steel-lined polytetrafluoroethylene straight pipe. Under the joint action of the bent sheet 801, the screw and the nut structure, a stable connection is achieved.

[0034] When in use, first put the connecting plate 7 on the outside of the bent pipe body 1, align the screw 9 with the flange hole 3, and then thread the nut through the two flanges. Finally, use hydraulic pliers to bend part of the side arc piece 8 to form a ring-shaped staggered distribution of bent pieces 801 and vertical pieces 802.

[0035] The end of the liner pipe 102 extends out of the center hole of the flange 2. Figure 3 As shown in , after the two pipelines are connected, the end of the liner pipe 102 is a contact sealing surface, and the liquid medium inside cannot contact the steel pipe part.

[0036] The connecting plate 7 includes: a first semicircular portion 701 and a second semicircular portion 702. The first semicircular portion 701 corresponds to the second semicircular portion 702 to form a complete ring. The first semicircular portion 701 and the second semicircular portion 702 are clamped on the outer side of the curved tube body 1 from both sides to achieve the purpose of sleeve-mounting the connecting plate 7 on the curved tube body 1.

[0037] The number of the side arc-shaped pieces 8 is twice the number of the screws 9, and the bent piece 801 is located between two adjacent screws 9. Figure 2 As shown in FIG, six screws 9 are provided, six bent pieces 801 are provided (two small pieces constitute a bent piece 801 at the joint of the first semicircular portion 701 and the second semicircular portion 702), and the number of vertical pieces 802 is also six.

[0038] The outer side of the curved pipe body 1 is fixedly connected with an outer curved reinforcement member 4, and the side of the outer curved reinforcement member 4 is fixedly connected with a mounting member 5, and the side of the mounting member 5 is provided with a long slot hole 6. Among them, the outer curved reinforcement member 4 is a 1CM thick steel plate, the mounting member 5 is an angle steel, the outer curved reinforcement member 4 is welded to the outer side of the curved pipe body 1, and the mounting member 5 is fixed to the outer curved reinforcement member 4 by welding.

[0039] The steel pipe 101 includes an arc section, and both ends of the arc section are fixedly connected to a straight pipe section.

[0040] 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 substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel-lined polytetrafluoroethylene reinforced elbow for pipe connection, comprising a pipe elbow (1), wherein the pipe elbow (1) comprises a steel pipe (101) and an inner liner pipe (102) fixed inside the steel pipe (101), wherein the material of the inner liner pipe (102) is polytetrafluoroethylene, and wherein: Also includes: A flange member (2), the flange member (2) being fixedly connected to the end of the bent pipe body (1), and the end of the flange member (2) being provided with a plurality of flange holes (3) distributed in an annular manner; A connecting plate (7) is annular and has an L-shaped cross section. The connecting plate (7) is sleeved on the outer side of the bent pipe body (1). The inner bottom of the connecting plate (7) is fixedly connected with a plurality of annularly distributed screws (9). Each screw (9) is equipped with a gasket (10) and a nut (11). The screws (9) correspond to the flange holes (3). The top of the connecting plate (7) is fixedly connected with a plurality of annularly distributed side arc pieces (8). When the steel-lined polytetrafluoroethylene reinforced elbow is connected and used, the side arc pieces (8) are bent at intervals to form annularly staggered distributed bent pieces (801) and vertical pieces (802).

2. A steel-lined polytetrafluoroethylene reinforced elbow for pipe connection according to claim 1, characterized in that: The end of the liner pipe (102) extends out of the central hole of the flange (2).

3. A steel-lined polytetrafluoroethylene reinforced elbow for pipe connection according to claim 1, characterized in that: The connecting disk (7) comprises: a first semicircular portion (701) and a second semicircular portion (702); the first semicircular portion (701) corresponds to the second semicircular portion (702) to form a complete ring shape.

4. A steel-lined polytetrafluoroethylene reinforced elbow for pipe connection according to claim 1, characterized in that: The number of the side arc-shaped pieces (8) is twice the number of the screws (9), and the bent piece (801) is located between two adjacent screws (9).

5. The steel-lined polytetrafluoroethylene reinforced elbow for pipe connection according to claim 1, characterized in that: An outer side of the curved pipe body (1) is fixedly connected to an outer curve reinforcement piece (4), a side of the outer curve reinforcement piece (4) is fixedly connected to a mounting piece (5), and a long slot hole (6) is provided on the side of the mounting piece (5).

6. A steel-lined polytetrafluoroethylene reinforced elbow for pipe connection according to claim 5, characterized in that: The outer curve reinforcement member (4) is a 1CM thick steel plate, and the mounting member (5) is an angle steel.

7. The steel-lined polytetrafluoroethylene reinforced elbow for pipe connection according to claim 1, characterized in that: The steel pipe (101) comprises an arc segment, and both ends of the arc segment are fixedly connected to straight pipe segments.

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