Connecting structure for steel skeleton polyethylene composite pipe

Abstract

The invention relates to the technical field of pipeline connecting equipment, in particular to a connecting structure for a steel skeleton polyethylene composite pipe, which comprises a steel skeleton polyethylene composite pipe and an occlusion type flange, a flange joint is arranged at the end part of the steel skeleton polyethylene composite pipe, the occlusion type flange is sleeved on the steel skeleton polyethylene composite pipe, and the occlusion type flange is connected with the steel skeleton polyethylene composite pipe. The ends, facing each other, of the occlusion type flange and the flange connector are vertical planes, the inner diameter surface of the occlusion type flange is attached to and slidably connected to the outer diameter surface of the steel skeleton polyethylene composite pipe, the end face of the occlusion type flange abuts against the end face of the flange connector, the occlusion type flange comprises two flange pieces, and the two flange pieces are arranged on the two sides of the occlusion type flange. The two flange pieces are detachably connected with each other. The pipeline sealing structure has the advantage of improving the pipeline sealing stability.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline connection equipment, and in particular to a connection structure for steel skeleton polyethylene composite pipes. Background Art

[0002] The traditional steel skeleton polyethylene composite pipe flange connection requires the use of a steel flange and a set of split rings to form a slip-on flange, which is connected to the flange ports of equipment such as valves, tank ports, and pump ports.

[0003] However, the contact surface between the split ring and the steel skeleton polyethylene composite pipe is an inclined surface, refer to Figure 1 During the installation of the flange, the split ring will be constantly squeezed by the force on the flange of the pipe, causing the flange of the pipe to shrink and deform the sealing surface, resulting in leakage. At the same time, during the use of the steel skeleton polyethylene composite pipe, due to the influence of thermal expansion and contraction and pipeline vibration, the split ring is prone to displacement on the inclined surface, causing the tightening bolts to loosen and cause leakage at the flange connection. Tightening the bolts again will solve the short-term leakage phenomenon. When the split ring is displaced again, it is tightened repeatedly, and the cycle repeats. Finally, the split ring climbs to the end of the inclined surface, and tightening it again will lose the sealing effect. Summary of the invention

[0004] In order to improve the sealing stability of pipelines, the present application provides a connection structure for steel skeleton polyethylene composite pipes.

[0005] The present application provides a steel skeleton polyethylene composite pipe connection structure using the following technical solutions: A connection structure for a steel-framed polyethylene composite pipe, comprising a steel-framed polyethylene composite pipe and a bite-type flange, wherein a flange joint is arranged at the end of the steel-framed polyethylene composite pipe, wherein the bite-type flange is sleeved on the steel-framed polyethylene composite pipe, wherein the ends of the bite-type flange and the flange joint facing each other are both vertical planes, wherein the inner diameter surface of the bite-type flange is fitted and slidably connected to the outer diameter surface of the steel-framed polyethylene composite pipe, wherein the end face of the bite-type flange abuts against the end face of the flange joint, and wherein the bite-type flange comprises two flange plates, wherein the two flange plates are detachably connected to each other.

[0006] By adopting the above technical scheme, the end of the bite flange and the end of the steel-framed polyethylene composite pipe are both vertical planes. When the bite flange seals and fixes the steel-framed polyethylene composite pipe, the bite flange only generates axial pressure on the steel-framed polyethylene composite pipe, and does not squeeze the steel-framed polyethylene composite pipe, thereby reducing the possibility of leakage caused by deformation of the sealing surface due to the reduction in diameter of the flange joint; reducing the possibility of displacement of the bite flange on the inclined plane, resulting in loosening of the fastened bolts and causing leakage at the flange connection, thereby improving the stability of the pipeline seal.

[0007] Optionally, the cross-section of the flange is a semicircular sheet structure, and a clamping block and a clamping hook block are respectively arranged at both ends of the flange, and the clamping blocks on the two interconnected flanges are hooked to the clamping hook blocks.

[0008] By adopting the above technical solution, the purpose of detachable connection of the flange is achieved.

[0009] Optionally, a clamping groove is provided on one side surface of the clamping hook block, the surface of the clamping block abuts against the inner wall of the clamping groove, and the clamping block is clamped in the clamping groove.

[0010] By adopting the above technical solution, the clamping groove limits the clamping block, so that the purpose of limiting the clamping block by the clamping hook block is achieved, and the purpose of detachable connection of the two flanges is achieved.

[0011] Optionally, the clamping block and the clamping hook block both protrude from the same surface of the flange, and a surface on one side of the clamping block away from the flange is set as abutment surface, which abuts against the bottom of the clamping groove, and two sides of the clamping block are set as limiting surfaces, which abut against two inner walls of the clamping groove that are opposite to each other.

[0012] By adopting the above technical solution, the clamping block and the clamping groove are tightly connected, thereby improving the connection stability of the two flanges.

[0013] Optionally, the clamping block and the clamping hook block are both integrally formed with the flange.

[0014] By adopting the above technical solution, the strength of the bite-type flange is improved.

[0015] Optionally, the flange is provided with a plurality of fixing holes, and the fixing holes are arranged in a fan-shaped array on the flange with the axis center of the flange as the center.

[0016] By adopting the above technical solution, the purpose of fixing and sealing the bite-type flange is achieved.

[0017] In summary, the present application includes at least one of the following beneficial technical effects: The end faces of the flange joint and the bite-type flange in the present application that face each other are vertical straight faces, so that after the bite-type flange is fixed, there will be no extrusion on the flange joint, thereby improving the stability of fixation and sealing; The two flanges in the present application are detachably connected by setting a snap-in block and a snap-in groove. The need for a split ring is eliminated, which simplifies the installation steps and eliminates the need to purchase flange split rings, thereby reducing the procurement cost of flange connections by 25%-35%. At the same time, the possibility of the split rings being easily lost during transportation and storage, which may affect installation and further affect the progress of the project, is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a steel skeleton polyethylene composite pipe connection mechanism in the prior art in the background technology.

[0019] Figure 2 It is a schematic diagram of a connection structure for a steel skeleton polyethylene composite pipe disclosed in an embodiment of the present application.

[0020] Figure 3 It is a schematic diagram of the structure of the flange in the embodiment of the present application.

[0021] Figure 4 It is a schematic diagram of the structure of the bite-type flange in the embodiment of the present application.

[0022] Explanation of the accompanying drawings: 1. Steel skeleton polyethylene composite pipe; 11. Flange joint; 2. Snap-on flange; 21. Flange plate; 211. Fixing hole; 3. Snap-in block; 31. Abutment surface; 32. Limiting surface; 4. Snap-in hook block; 41. Snap-in groove. DETAILED DESCRIPTION

[0023] The following is combined with Figure 2 -Attached Figure 4 This application is described in further detail.

[0024] At present, in order to improve the stability of pipeline sealing, the embodiment of the present application proposes a connection structure for steel skeleton polyethylene composite pipe.

[0025] The present application embodiment discloses a connection structure for a steel skeleton polyethylene composite pipe. Figure 2-Figure 4 A connection structure for a steel-framed polyethylene composite pipe includes a steel-framed polyethylene composite pipe 1 and a bite-type flange 2. A flange joint 11 is provided at the end of the steel-framed polyethylene composite pipe 1. At the same time, the inner diameter of the original steel flange is reduced to form a bite-type flange 2. The inner diameter of the bite-type flange 2 is reduced to match the outer diameter of the steel-framed polyethylene composite pipe 1. At the same time, the size of the inner diameter of the flange occupied by a set of split rings is also reduced, so that the bite-type flange 2 is sleeved on the steel-framed polyethylene composite pipe 1. The ends of the bite-type flange 2 and the flange joint 11 facing each other are both vertical planes, and the form of direct face abutment and connection is adopted. The inner diameter surface of the bite-type flange 2 is fitted and slidably connected to the outer diameter surface of the steel-framed polyethylene composite pipe 1, and the end face of the bite-type flange 2 abuts against the end face of the flange joint 11. The bite-type flange 2 includes two flange sheets 21, and the two flange sheets 21 are detachably connected to each other.

[0026] Since the split ring is eliminated, the thickness of the bite-type flange 2 is appropriately increased, and the outer diameter of the flange joint 11 is appropriately increased. By increasing the thickness of the bite-type flange 2 and the outer diameter of the flange joint 11, the connection strength is improved.

[0027] Reference Figure 2-Figure 4The ends of the bite flange 2 and the end of the steel-framed polyethylene composite pipe 1 are both vertical planes. When the bite flange 2 seals and fixes the steel-framed polyethylene composite pipe 1, the bite flange 2 only generates axial pressure on the steel-framed polyethylene composite pipe 1, and does not squeeze the steel-framed polyethylene composite pipe 1, thereby reducing the possibility of leakage caused by deformation of the sealing surface due to the reduction in diameter of the flange joint 11; reducing the possibility of displacement of the bite flange 2 on the inclined plane, resulting in loosening of the fastened bolts and causing leakage at the flange connection, thereby improving the stability of the pipeline seal.

[0028] Reference Figure 2-Figure 4 The cross section of the flange 21 is a semicircular sheet structure, and the flange 21 is provided with a plurality of fixing holes 211, which are arranged in a fan-shaped array on the flange 21 with the axis center of the flange 21 as the center. In the embodiment of the present application, the number of fixing holes 211 on each flange 21 is four. Bolts pass through the fixing holes 211 to achieve the purpose of fixing and sealing the bite-type flange 2.

[0029] Reference Figure 3 and Figure 4 , the two ends of the flange 21 are respectively provided with a clamping block 3 and a clamping hook block 4, the clamping block 3 and the clamping hook block 4 both protrude from the same surface of the flange 21, the clamping block 3 forms a tenon form, a clamping groove 41 is provided on one side surface of the clamping hook block 4, the clamping hook block 4 forms a mortise form, the clamping blocks 3 on the two mutually connected flanges 21 are hooked to the clamping hook block 4, forming a bite-type flange 2. The side surface of the clamping block 3 away from the flange 21 is provided with an abutting surface 31, the abutting surface 31 abuts against the bottom of the clamping groove 41, the two sides of the clamping block 3 are provided with limiting surfaces 32, the limiting surfaces 32 abut against the two inner walls of the clamping groove 41 facing each other, so as to achieve the purpose of the surface of the clamping block 3 abutting against the inner wall of the clamping groove 41, the clamping block 3 clamping to the clamping groove 41, the purpose of the clamping hook block 4 limiting the clamping block 3, and the detachable connection of the clamping block 3 and the clamping hook block 4.

[0030] When fixing and sealing, the end faces of the bite-type flange 2 and the flange joint 11 abut against each other, and the two flange sheets 21 of the bite-type flange 2 will not be disconnected from each other, so that the clamping block 3 and the clamping groove 41 are tightly connected, improving the connection stability of the two flange sheets 21, and achieving the function of fixing and sealing. The clamping block 3 and the clamping hook block 4 are both integrally formed with the flange sheet 21.

[0031] During installation, use two flanges 21 as a set, insert the opening of the flange 21 into the flange joint 11, rotate it around the steel skeleton polyethylene composite pipe 1, adjust the angles of the two flanges 21, tilt them, etc., make the clamping blocks 3 and the clamping grooves 41 of the two flanges face each other, connect them, and then slide along the pipe circumference to make the assembled bite-type flange 2 and the flange joint 11 face to face, so that the connection of the bite-type flange 2 can be achieved.

[0032] After such adjustment, the deformation caused by the force movement of the split ring on the flange joint 11 is eliminated, and at the same time the contact area between the bite-type flange 2 and the flange joint 11 is increased, so that the contact surfaces of the bite-type flange 2 and the flange joint 11 can be well fitted, ensuring that the bite-type flange 2 is evenly stressed and increasing the bolt tightening strength.

[0033] Furthermore, eliminating the split ring can not only simplify the installation steps, but also eliminate the need to purchase flange split rings, thereby reducing the purchase cost of flange connections by 25%-35%. At the same time, it also reduces the possibility that the split rings are easily lost during transportation and storage, affecting installation and further affecting the progress of the project.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A connection structure for a steel skeleton polyethylene composite pipe, comprising a steel skeleton polyethylene composite pipe (1), wherein the end of the steel skeleton polyethylene composite pipe (1) is provided with a flange joint (11), characterized in that: A connection structure for a steel skeleton polyethylene composite pipe also includes a bite-type flange (2) sleeved on the steel skeleton polyethylene composite pipe (1), the ends of the bite-type flange (2) and the flange joint (11) facing each other are both vertical planes, the inner diameter surface of the bite-type flange (2) is fitted and slidably connected to the outer diameter surface of the steel skeleton polyethylene composite pipe (1), the end face of the bite-type flange (2) is abutted against the end face of the flange joint (11), and the bite-type flange (2) includes two flange plates (21), and the two flange plates (21) are detachably connected to each other.

2. A connection structure for a steel skeleton polyethylene composite pipe according to claim 1, characterized in that: The cross section of the flange (21) is a semicircular sheet structure. A clamping block (3) and a clamping hook block (4) are respectively arranged at two ends of the flange (21). The clamping blocks (3) on the two mutually connected flanges (21) are hooked to the clamping hook blocks (4).

3. A connection structure for a steel skeleton polyethylene composite pipe according to claim 2, characterized in that: A clamping groove (41) is provided on one side surface of the clamping hook block (4), the surface of the clamping block (3) abuts against the inner wall of the clamping groove (41), and the clamping block (3) is clamped in the clamping groove (41).

4. A connection structure for a steel skeleton polyethylene composite pipe according to claim 3, characterized in that: The clamping block (3) and the clamping hook block (4) both protrude from the same surface of the flange (21); a surface of the clamping block (3) on one side away from the flange (21) is arranged as an abutting surface (31); the abutting surface (31) abuts against the bottom of the clamping groove (41); and both sides of the clamping block (3) are arranged as limiting surfaces (32); the limiting surfaces (32) abut against two inner walls of the clamping groove (41) that are opposite to each other.

5. A connection structure for a steel skeleton polyethylene composite pipe according to claim 2, characterized in that: The clamping block (3) and the clamping hook block (4) are both integrally formed with the flange (21).

6. A connection structure for a steel skeleton polyethylene composite pipe according to claim 2, characterized in that: The flange (21) is provided with a plurality of fixing holes (211), and the fixing holes (211) are arranged in a fan-shaped array on the flange (21) with the axis center of the flange (21) as the center.

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