Corrosion-resistant and high-temperature-resistant steel lining PFA tee joint

Abstract

The utility model discloses a corrosion-resistant and high-temperature-resistant steel lining PFA tee joint which comprises an outer straight pipe and an outer middle pipe. According to the corrosion-resistant and high-temperature-resistant steel lining PFA tee joint, the locking grooves, the locking protruding blocks and the arc-shaped strips are matched, the straight pipe lining is pulled, the straight pipe lining is prevented from being stripped under the condition of negative pressure, the attaching degree is improved, and therefore the service life of the tee joint is prolonged; the bolts can be subjected to anti-corrosion protection during mounting by utilizing the positioning convex columns, and the butt joint accuracy can be enhanced during butt joint mounting; and the hoop is utilized to play a role in fastening and leakage prevention at the butt joint.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tee, especially a corrosion and high temperature resistant steel lining PFA tee. BACKGROUND

[0002] The tee is also called pipe tee or tee pipe fitting, tee joint, etc., and is mainly used for changing the direction of fluid and used at the branch pipe of main pipe; at present, the tee is only coated with anticorrosive layer on the inner wall of the tee pipe or the anticorrosive lining is simply pasted to the inner wall of the elbow pipe in the using process, so that the structural strength is unreliable and the pipe wall separation problem occurs, thereby reducing the service life of the tee pipe; therefore, the corrosion and high temperature resistant steel lining PFA tee is provided. SUMMARY

[0003] The utility model provides a corrosion and high temperature resistant steel lining PFA tee, can guarantee the adhesion of the lining, and improves the service life.

[0004] Technical scheme: the utility model provides a corrosion and high temperature resistant steel lining PFA tee, which comprises an outer straight pipe and an outer middle pipe, one end of the outer middle pipe is fixed in the middle of the outer straight pipe in a communicating mode, a straight pipe lining is arranged in the outer straight pipe, a middle pipe lining is arranged in the outer middle pipe in an integrated communicating mode on the straight pipe lining, mounting flanges are arranged at the pipe opening of the outer middle pipe and the two pipe openings of the outer straight pipe, lining turnups that are integrated with the corresponding mounting flanges are arranged on the end of the middle pipe lining and the two ends of the straight pipe lining, a plurality of locking grooves are arranged on the inner wall of the outer middle pipe, a plurality of locking protrusions that are embedded in the locking grooves are arranged on the middle pipe lining in an integrated mode, arc-shaped strips that penetrate through the locking protrusions are fixed on the locking grooves, and hoops are mounted on the three mounting flanges.

[0005] Further, reinforcing ring grooves that are in dovetail shape in cross section are arranged on the mounting flanges, and annular wedge strips that are embedded in the corresponding reinforcing ring grooves are arranged on the lining turnups in an integrated mode.

[0006] Further, a plurality of locking protruding columns are arranged on the outer middle pipe and the outer straight pipe in an integrated mode, a plurality of stepped grooves that extend into the locking protruding columns are arranged on the inner walls of the outer middle pipe and the outer straight pipe, and the groove bottom diameter of the stepped grooves is greater than the groove opening diameter, and a plurality of stepped protruding columns that are embedded in the stepped grooves are arranged on the straight pipe lining and the middle pipe lining in an integrated mode.

[0007] Further, a sealing ring is arranged in the hoop, a sealing protruding ring is arranged on the inner wall of the sealing ring in an integrated mode, and annular grooves that are matched with the sealing protruding ring are arranged on the circumferential side surface of the mounting flanges.

[0008] Compared with the prior art, the utility model has the advantages that: the cooperation between the locking groove, the locking convex block and the arc-shaped strip plays a traction role on the straight pipe lining, prevents the straight pipe lining from being peeled off under negative pressure, improves the adhesion, and thus improves the service life of the tee joint; the positioning convex column can prevent corrosion of the bolt during installation, and can enhance the butt joint accuracy during butt joint installation; the clamp plays a fastening and leakage prevention role at the butt joint. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a sectional view of the utility model;

[0010] Figure 2 It is a front view of the utility model;

[0011] Figure 3 It is a partial sectional view of the utility model;

[0012] Figure 4 It is a partial sectional view of the utility model;

[0013] Figure 5 It is a structural schematic view of the clamp of the utility model;

[0014] Figure 6 It is a sectional view of the clamp of the utility model;

[0015] In the drawing: 1, outer straight pipe; 2, outer middle pipe; 3, straight pipe lining; 4, middle pipe lining; 5, installation flange; 6, arc-shaped strip; 7, locking groove; 8, locking convex column; 9, step convex column; 11, positioning convex column; 12, flange hole; 13, clamp; 14, fastening plate; 15, tension bolt; 16, tension nut; 17, sealing ring; 18, sealing convex ring; 19, lining turnup; 20, annular wedge strip; 21, annular groove. DETAILED DESCRIPTION

[0016] The technical scheme of the utility model will be described in detail below with reference to the drawings, but the protection scope of the utility model is not limited to the embodiments.

[0017] In the utility model, unless another explicit provision and limitation, the terms "installation", "connection", "connection", "fixing" and other terms should be understood broadly, for example, can be fixed connection, can be detachable connection, or integrated; can be directly connected, or indirectly connected through an intermediate medium, can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0018] In the description of the utility model, it is understood that the terms "left", "right", "front", "back", "top", "bottom", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of the simplified description of the utility model, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0019] Embodiment 1:

[0020] As Figures 1-6 shown, the utility model provides a kind of corrosion-resistant high-temperature-resistant steel lining PFA tee joint, including: outer straight pipe 1 and outer medium pipe 2;Outer medium pipe 2 one end is fixed in the middle part of outer straight pipe 1 in the form of communication, and the diameter of outer medium pipe 2 is equal to the diameter of outer straight pipe 1, the axis of outer medium pipe 2 is perpendicular to the axis of outer straight pipe 1;Straight pipe lining 3 is provided in outer straight pipe 1;Integral type communication is provided in outer medium pipe 2 in the middle pipe lining 4 on straight pipe lining 3;Coaxial type is provided with installation flange 5 at the pipe orifice of outer medium pipe 2 and the two pipe orifices of outer straight pipe 1;The end of middle pipe lining 4 and the two ends of straight pipe lining 3 are integrally provided with lining turnup 19 that is attached with corresponding installation flange 5;A plurality of locking grooves 7 are provided on the inner wall of outer medium pipe 2;Each locking lug embedded in each locking groove 7 is integrally provided on middle pipe lining 4;Arc strip 6 is fixed on locking groove 7 and penetrates locking lug;A plurality of positioning convex columns 11 are intervally provided on each installation flange 5;Each positioning convex column 11 is respectively penetrated by each flange hole 12 of installation flange 5;Each installation flange 5 is provided with clamp 13.

[0021] The cooperation between locking groove 7, locking lug and arc strip 6 plays a traction role on straight pipe lining 3, prevents straight pipe lining 3 from being stripped under negative pressure, improves the degree of fit, thereby improving the service life of tee joint;Positioning convex column 11 can prevent corrosion of bolt during installation, and can enhance the butt joint accuracy during butt joint installation;Clamp 13 plays a fastening leak-proof role at the butt joint.

[0022] Further, reinforcing ring groove with dovetail-shaped cross section is provided on each installation flange 5;Annular wedge 20 embedded in corresponding reinforcing ring groove is integrally provided on each lining turnup 19.The cooperation between reinforcing ring groove and annular wedge 20 further improves the fit of the end of straight pipe lining 3 and middle pipe lining 4, and plays a certain sealing role between installation flange 5 and lining turnup 19.

[0023] Further, a plurality of locking protrusions 8 are integrally arranged on the outer middle pipe 2 and the outer straight pipe 1; a plurality of stepped grooves extending into each locking protrusion 8 are arranged on the inner walls of the outer middle pipe 2 and the outer straight pipe 1, and the groove bottom diameter of the stepped groove is larger than the slot diameter; each stepped protrusion 9 is integrally arranged on the straight pipe lining 3 and the middle pipe lining 4 and is embedded in each stepped groove.

[0024] The cooperation between each stepped groove in the locking protrusion 8 and the stepped protrusion 9 plays a pulling role on the straight pipe lining 3 and the middle pipe lining 4, ensures the fit degree of the straight pipe lining 3 and the middle pipe lining 4 in the use scenario of negative pressure, and the cooperation of multiple groups can disperse stress and improve structural strength.

[0025] Further, the fastening plates 14 are arranged on the two edges parallel to the axis of the hoop 13; the tension bolts 15 are penetrated through the two fastening plates 14; the tension nuts 16 are screwed on the penetrated ends of the tension bolts 15, and the tension nuts 16 and the bolt heads of the tension bolts 15 clamp the two fastening plates 14.

[0026] The sealing ring 17 is arranged in the hoop 13; the sealing protruding ring 18 is integrally arranged on the inner wall of the sealing ring 17; the annular grooves 21 matched with the sealing protruding ring 18 are arranged on the circumferential side surfaces of each mounting flange 5.

[0027] The tension bolts 15 and the tension nuts 16 are used to pull the two fastening plates 14, so that the hoop 13 tightly holds the mounting flange 5 and plays a fastening role, and the sealing protruding ring 18 on the sealing ring 17 is tightly pressed in the annular groove 21, further playing a sealing and leakage-proof role.

[0028] In the corrosion-resistant and high-temperature-resistant steel lining PFA tee joint, the straight pipe lining 3, the middle pipe lining 4, the lining flange 19, the annular wedge 20, the locking protrusion and the locking protrusion 8 are all made of the existing anti-corrosion material PFA plastic.

[0029] As described above, although the utility model has been shown and expressed by referring to the specific preferred embodiments, it should not be interpreted as a limitation of the utility model itself. Various changes can be made in form and details without departing from the spirit and scope of the utility model defined in the appended claims.

Claims

1. A corrosion and high temperature resistant steel lined PFA tee, characterized in that: It includes outer straight pipe (1) and outer medium pipe (2), one end of outer medium pipe (2) is fixed in the middle of outer straight pipe (1) in the form of communication, straight pipe lining (3) is arranged in outer straight pipe (1), medium pipe lining (4) is arranged in outer medium pipe (2) and is integrally communicated on straight pipe lining (3), mounting flange (5) is arranged at the pipe opening of outer medium pipe (2) and the two pipe openings of outer straight pipe (1), lining turnup (19) is integrally arranged on the end of medium pipe lining (4) and the two ends of straight pipe lining (3) and is matched with corresponding mounting flange (5), a plurality of locking grooves (7) are arranged on the inner wall of outer medium pipe (2), a plurality of locking blocks are integrally arranged on medium pipe lining (4) and are embedded in each locking groove (7), arc-shaped strip (6) is fixed on locking groove (7) and penetrates locking block, hoop (13) is mounted on three mounting flanges (5).

2. The corrosion and high temperature resistant steel lined PFA tee as claimed in claim 1, wherein: The cross section of reinforcing ring groove is swallowtail shape, and annular wedge (20) is integrally arranged on each lining turnup (19) and is embedded in corresponding reinforcing ring groove.

3. The corrosion and high temperature resistant steel lined PFA tee as claimed in claim 1, wherein: A plurality of locking convex columns (8) are integrally arranged on outer medium pipe (2) and outer straight pipe (1), a plurality of stepped grooves are arranged on the inner wall of outer medium pipe (2) and outer straight pipe (1) and extend into each locking convex column (8), and the groove bottom diameter of stepped groove is greater than the slot opening diameter, each stepped convex column (9) is integrally arranged on straight pipe lining (3) and medium pipe lining (4) and is embedded in each stepped groove.

4. The corrosion and high temperature resistant steel lined PFA tee as claimed in claim 1, wherein: Sealing ring (17) is arranged in hoop (13), sealing convex ring (18) is integrally arranged on the inner wall of sealing ring (17), annular groove (21) is arranged on the circumferential side surface of each mounting flange (5) and is matched with sealing convex ring (18).

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