Corrosion-resistant lining PFA elbow

Abstract

The utility model discloses a corrosion-resistant lining PFA elbow. The corrosion-resistant lining PFA elbow comprises an elbow pipe and a corrosion-resistant lining pipe. According to the corrosion-resistant lining PFA elbow, the step grooves in the buckle protruding columns are matched with the step protruding columns, the effect of pulling the corrosion-resistant lining pipe is achieved, it is guaranteed that the corrosion-resistant lining pipe can still be tightly attached to the inner wall of the elbow in the negative pressure use scene, stress in the negative pressure state can be dispersed through matching of the multiple sets of the corrosion-resistant lining PFA elbow, and the corrosion-resistant lining pipe is prevented from being broken; by means of cooperation of the lock catch grooves, the lock catch protruding blocks and the arc-shaped strips, the traction effect is further achieved, and the attaching degree and the negative pressure resistance of the anti-corrosion liner tube are improved; 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 kind of elbow, especially a kind of corrosion-resistant lining PFA elbow. BACKGROUND

[0002] Various corrosion-resistant pipes are often needed in chemical industry, and elbow is commonly used connecting pipe. In order to achieve corrosion resistance, corrosion-resistant pipe needs to be lined inside the elbow. However, the existing corrosion-resistant pipe is simply pasted to the inner wall of the elbow, and the structural strength is unreliable. The pipe wall may separate during long-term use. Therefore, a corrosion-resistant lining PFA elbow is proposed. SUMMARY

[0003] The utility model provides a kind of corrosion-resistant lining PFA elbow, and the adhesion of elbow and corrosion-resistant lining pipe is higher and not easy to separate during long-term use.

[0004] Technical scheme: the corrosion-resistant lining PFA elbow provided by the utility model comprises an elbow and a corrosion-resistant lining pipe.

[0005] The corrosion-resistant lining pipe is installed on the inner wall of the elbow. Flanges are coaxially arranged on both ends of the elbow. A clamp is installed on each flange. A plurality of buckle protruding columns are integrally arranged on the elbow. Each step groove extending into the buckle protruding column is arranged on the inner wall of the elbow. Each step protruding column embedded in each step groove is integrally arranged on the corrosion-resistant lining pipe. A plurality of lock grooves are arranged on the inner wall of the elbow. A lock protruding block embedded in each lock groove is integrally arranged on the corrosion-resistant lining pipe. An arc-shaped strip embedded in the corresponding lock protruding block is fixed on the lock groove.

[0006] Further, an inner lining turn-up is integrally arranged on both ends of the corrosion-resistant lining pipe to fit the corresponding side flange. A positioning ring groove with dovetail cross section is arranged on the end face of each flange. An annular wedge with dovetail cross section is integrally arranged on the inner lining turn-up, and the annular wedge is embedded in the positioning ring groove.

[0007] Further, a plurality of positioning protruding columns are arranged on the flange in an interval. A positioning hole penetrating through the corresponding flange is arranged on each positioning protruding column.

[0008] Further, a sealing ring is arranged in the clamp. A convex ring is integrally arranged on the inner wall of the sealing ring. An annular groove matched with the convex ring is arranged on the circumferential side face of the flange.

[0009] The utility model discloses compared with prior art, its beneficial effect is: utilize the cooperation between each step groove in buckle boss and step boss, play the pulling effect to anticorrosion lining pipe, guarantee under the use scene of negative pressure, anticorrosion lining pipe can still be close to elbow inner wall, and the cooperation of multiple groups can disperse the stress under the negative pressure state, prevent anticorrosion lining pipe rupture, utilize the cooperation between lock catch groove, lock catch block and arc strip, further play the pulling effect, improve the adhesion of anticorrosion lining pipe and the negative pressure resistance, utilize the fastening leakproof effect of clamp at the butt joint. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the sectional view of the utility model;

[0011] Figure 2 It is the assembly drawing of the utility model clamp;

[0012] Figure 3 It is the partial sectional view of the utility model;

[0013] Figure 4 It is the partial sectional enlarged view of the utility model;

[0014] Figure 5 It is the component diagram of the utility model clamp;

[0015] Figure 6 It is the sectional view of the utility model clamp;

[0016] In the drawing: 1, elbow;2, buckle boss;3, flange plate;4, annular groove;5, positioning boss;6, arc strip;7, lock catch groove;8, positioning hole;9, anticorrosion lining pipe;10, inner lining flange;11, annular wedge strip;12, step boss;13, clamp;14, fastening plate;15, tension bolt;16, tension nut;17, sealing ring;18, convex ring. DETAILED DESCRIPTION

[0017] The utility model technical scheme will be explained in detail below in conjunction with the drawings, but the protection scope of the utility model is not limited to the embodiment.

[0018] In the utility model, unless another explicit provision and limitation, the terms "installation", "link", "connection", "fixing" and so on should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integral;Can be direct connection, also can be indirectly connected through intermediate medium, can be the intercommunication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0019] 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 based on 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.

[0020] Embodiment 1:

[0021] As Figures 1-6 The utility model provides a kind of corrosion-resistant lining PFA elbow, comprising: elbow 1, corrosion-resistant lining pipe 9 and two clamps 13;Corrosion-resistant lining pipe 9 is installed on the inner wall of elbow 1;It is coaxially provided with flange plate 3 on both ends of elbow 1;Clamp 13 is installed on both flange plates 3;

[0022] A plurality of buckle protruding columns 2 are integrally provided on elbow 1;Each step groove that is inserted into buckle protruding column 2 is provided on the inner wall of elbow 1, and the groove bottom diameter of step groove 12 is greater than the diameter of slot opening;

[0023] Each step protruding column 12 embedded in each step groove is integrally provided on corrosion-resistant lining pipe 9;A plurality of lock grooves 7 are provided on the inner wall of elbow 1;Lock protruding block embedded in corresponding lock protruding block is integrally provided on corrosion-resistant lining pipe 9 on the lock groove 7;Arc strip 6 embedded in corresponding lock protruding block is fixed on lock groove 7.

[0024] The cooperation between each step groove in buckle protruding column 2 and step protruding column 12 plays a pulling role on corrosion-resistant lining pipe 9, ensures that corrosion-resistant lining pipe 9 can still be close to elbow inner wall under the use scenario of negative pressure, and the cooperation of multiple groups can disperse stress under negative pressure state to prevent corrosion-resistant lining pipe 9 from breaking;The cooperation between lock groove 7, lock protruding block and arc strip 6 further plays a pulling role, improves the adhesion of corrosion-resistant lining pipe 9 and the negative pressure resistance;Clamp 13 plays a fastening leak-proof role at the joint.

[0025] Further, inner lining turnup 10 that corresponds to the side flange plate 3 is integrally provided on both ends of the corrosion-resistant lining pipe 9;Positioning ring groove with dovetail-shaped cross section is provided on the end face of both flange plates 3;Annular wedge strip 11 with dovetail-shaped cross section is integrally provided on inner lining turnup 10, and annular wedge strip 11 is embedded in positioning ring groove. The cooperation between positioning ring groove and annular wedge strip 11 further improves the adhesion of the end of corrosion-resistant lining pipe 9, and plays a certain sealing role between flange plate 3 and inner lining turnup 10.

[0026] Further, a plurality of positioning convex columns 5 are arranged on the flange plate 3 in a spaced manner; a positioning hole 8 penetrating the corresponding flange plate 3 is arranged on each positioning convex column 5. The positioning convex column 5 can prevent corrosion of the bolt during installation, and can enhance the butt joint accuracy during butt joint installation.

[0027] Further, the fastening plates 14 are arranged on the two edges of the hoop 13 parallel to the axis; the tension bolts 15 penetrate the two fastening plates 14; the tension nuts 16 are screwed on the penetrating ends of the tension bolts 15, the tension nuts 16 and the bolt heads of the tension bolts 15 clamp the two fastening plates 14; the sealing ring 17 is arranged in the hoop 13; the convex ring 18 is integrally arranged on the inner wall of the sealing ring 17; the annular groove 4 matched with the convex ring 18 is arranged on the circumferential side of the flange plate 3.

[0028] The tension bolts 15 and the tension nuts 16 clamp the two fastening plates 14, so that the hoop 13 tightly holds the flange plate 3 to play a fastening role, and the convex ring 18 on the sealing ring 17 is tightly pressed in the annular groove 4 to further play a sealing and leakage-proof role.

[0029] In the corrosion-resistant lining PFA elbow, the corrosion-resistant lining pipe 9 adopts the existing corrosion-resistant material PFA plastic.

[0030] As described above, although the present application has been shown and described with respect to certain preferred embodiments, it is to be understood that the present application is not to be limited to the specific preferred embodiments. Various changes in form and detail can be made without departing from the spirit and scope of the present application as defined by the appended claims.

Claims

1. A corrosion resistant liner PFA elbow characterized by: The bend pipe (1) and the anticorrosion lining pipe (9) are included. The anticorrosion lining pipe (9) is installed on the inner wall of the bend pipe (1); the flanges (3) are coaxially arranged on both ends of the bend pipe (1); the clamps (13) are installed on both flanges (3); the buckle protruding columns (2) are integrally arranged on the bend pipe (1); the step grooves are arranged on the inner wall of the bend pipe (1) and extend into the buckle protruding columns (2); the step protruding columns (12) are integrally arranged on the anticorrosion lining pipe (9) and embedded in the step grooves; the lock grooves (7) are arranged on the inner wall of the bend pipe (1); the lock protruding blocks are integrally arranged on the anticorrosion lining pipe (9) and embedded in the lock grooves (7); the arc-shaped strips (6) are fixed on the lock grooves (7) and embedded in the corresponding lock protruding blocks.

2. The corrosion-resistant lining PFA elbow according to claim 1, characterized in that: The inner lining flanges (10) are integrally arranged on both ends of the anticorrosion lining pipe (9) and attached to the corresponding side flanges (3); the positioning ring grooves with dovetail-shaped cross sections are arranged on the end faces of the two flanges (3); the annular wedge strips (11) with dovetail-shaped cross sections are integrally arranged on the inner lining flanges (10) and embedded in the positioning ring grooves.

3. The corrosion resistant liner PFA elbow of claim 1, wherein: The positioning protruding columns (5) are arranged on the flanges (3) at intervals; the positioning holes (8) are arranged on each positioning protruding column (5) and extend through the corresponding flange (3).

4. The corrosion resistant liner PFA elbow of claim 1, wherein: The sealing rings (17) are arranged in the clamps (13); the convex rings (18) are integrally arranged on the inner walls of the sealing rings (17); the annular grooves (4) are arranged on the circumferential side faces of the flanges (3) and matched with the convex rings (18). The bend pipe (1) and the anticorrosion lining pipe (9) are included. The anticorrosion lining pipe (9) is installed on the inner wall of the bend pipe (1); the flanges (3) are coaxially arranged on both ends of the bend pipe (1); the clamps (13) are installed on both flanges (3); the buckle protruding columns (2) are integrally arranged on the bend pipe (1); the step grooves are arranged on the inner wall of the bend pipe (1) and extend into the buckle protruding columns (2); the step protruding columns (12) are integrally arranged on the anticorrosion lining pipe (9) and embedded in the step grooves; the lock grooves (7) are arranged on the inner wall of the bend pipe (1); the lock protruding blocks are integrally arranged on the anticorrosion lining pipe (9) and embedded in the lock grooves (7); the arc-shaped strips (6) are fixed on the lock grooves (7) and embedded in the corresponding lock protruding blocks. The inner lining flanges (10) are integrally arranged on both ends of the anticorrosion lining pipe (9) and attached to the corresponding side flanges (3); the positioning ring grooves with dovetail-shaped cross sections are arranged on the end faces of the two flanges (3); the annular wedge strips (11) with dovetail-shaped cross sections are integrally arranged on the inner lining flanges (10) and embedded in the positioning ring grooves. The positioning protruding columns (5) are arranged on the flanges (3) at intervals; the positioning holes (8) are arranged on each positioning protruding column (5) and extend through the corresponding flange (3). The sealing rings (17) are arranged in the clamps (13); the convex rings (18) are integrally arranged on the inner walls of the sealing rings (17); the annular grooves (4) are arranged on the circumferential side faces of the flanges (3) and matched with the convex rings (18).

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