A connecting structure of a steel wire mesh skeleton composite pipe

Abstract

The utility model relates to pipeline connection technical field especially relates to a kind of connecting structure of steel wire mesh skeleton composite pipe, including shell and pipe fitting, the pipe fitting is arranged between two the shell, adjusting mechanism is equipped in the shell, the adjusting mechanism includes fixed block, slide bar, magnetic block, heating sheet, extraction cylinder, two the fixed block is respectively fixedly connected on the inner side wall of the shell, the utility model is cooperated by air bag, extraction cylinder, shell and so on structure, preliminary connection is fixed and sealed using magnetic block, heating sheet is inducted eddy current heating while driving magnetic block reciprocating motion, gas in the shell is rapidly extracted, so that pipe material is not affected by external influence and is heated evenly, reduce the heat damage heating more rapidly, improve the efficiency of cladding, slowly cooling contraction is stable, avoid temperature cooling distribution uneven and local shrinkage cracking caused by rapid cooling due to wind blowing, and connection effect is better.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, and in particular to a connection structure for a steel wire mesh reinforced composite pipe. Background Technology

[0002] Steel wire mesh reinforced composite pipe is a new type of pipe that uses a mesh skeleton formed by spirally winding high-strength steel wire as reinforcement, high-density polyethylene (HDPE) as matrix, and high-performance HDPE modified bonding resin to tightly connect the steel wire skeleton with the inner and outer layers of high-density polyethylene. The mainstream connection method is electrofusion connection, which uses the built-in resistance wire of the electrofusion fitting to heat and melt the outer plastic layer of the pipe to the inner plastic layer of the fitting.

[0003] Electrofusion welding is sensitive to the environment. In windy conditions, uneven heating can easily occur, and rapid cooling can cause stress concentration in the weld seam, leading to water leakage and affecting the connection effect, resulting in poor connection quality. Utility Model Content

[0004] The purpose of this utility model is to solve the following shortcomings in the prior art: electrofusion connection is sensitive to the environment, and uneven heating is easily caused in windy conditions. Rapid cooling leads to weld shrinkage stress concentration and water leakage, thus affecting the connection effect and resulting in poor connection quality. Therefore, a connection structure for steel wire mesh skeleton composite pipe is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A connection structure for a steel wire mesh reinforced composite pipe includes a shell and a fitting, wherein the fitting is disposed between two shells;

[0007] The housing is provided with an adjustment mechanism, which includes a fixing block, a sliding rod, a magnetic block, a heating element, and an extraction cylinder. The two fixing blocks are respectively fixedly connected to the inner side wall of the housing, the two sliding rods are respectively slidably connected to the side wall of the fixing block, the two magnetic blocks are respectively fixedly connected to the two ends of the sliding rod, the two heating elements are respectively fixedly connected to the inner side wall of the pipe, and the extraction cylinder is fixedly connected to the side wall of the fixing block located above.

[0008] Preferably, a U-shaped frame is fixedly connected to the side wall of the upper housing, a motor is fixedly connected to the inner side wall of the U-shaped frame, and a turntable is fixedly connected to the output end of the motor.

[0009] Preferably, a push rod is fixedly connected to the side wall of the magnetic block near the turntable, and a connecting rod is hinged between the push rod and the turntable.

[0010] Preferably, a piston plate is slidably connected to the inner side wall of the extraction cylinder, an extraction rod is fixedly connected to the side wall of the piston plate, the extraction rod is slidably connected to one side wall of the extraction cylinder, a pressing plate is fixedly connected to the end of the extraction rod away from the piston plate, and the magnetic block near the turntable is slidably connected to the pressing plate.

[0011] Preferably, an air inlet pipe and an air outlet pipe are fixedly connected to the side wall of the extraction cylinder, and a one-way valve is provided in both the air inlet pipe and the air outlet pipe. Arc-shaped blocks are fixedly connected to both ends of the housing, and an air bag is fixedly connected to the inner side wall of the arc-shaped blocks.

[0012] Preferably, a return spring is fixedly connected between the extrusion plate and the extraction cylinder.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] Through the cooperation of structures such as airbags, extraction cylinders, and shells, magnetic blocks are used for initial connection, fixation, and sealing. While driving the magnetic blocks to reciprocate and induce eddy currents in the heating element, the gas inside the shell is quickly extracted, so that the pipe is not affected by external factors and is heated evenly, reducing heat damage. The heating is relatively rapid, improving the cladding efficiency. Slow cooling and shrinkage are stable, avoiding uneven temperature distribution caused by wind and local shrinkage cracking caused by rapid cooling, resulting in a better connection effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a U-shaped frame structure for the connection structure of a steel wire mesh skeleton composite pipe proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the heating element structure of the connection structure of the steel wire mesh skeleton composite pipe proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the fixing block structure of the connection structure of the steel wire mesh skeleton composite pipe proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the airbag structure of the connection structure of the steel wire mesh skeleton composite pipe proposed in this utility model;

[0019] Figure 5 for Figure 4 A magnified view of part A in the image.

[0020] In the diagram: 1. Housing, 2. Pipe fitting, 3. Fixing block, 4. Slide rod, 5. Magnetic block, 6. Heating element, 7. Extraction cylinder, 8. U-shaped frame, 9. Motor, 10. Turntable, 11. Push rod, 12. Connecting rod, 13. Piston plate, 14. Extraction rod, 15. Extrusion plate, 16. Inlet pipe, 17. Outlet pipe, 18. Arc-shaped block, 19. Airbag, 20. Return spring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] The terms used in this utility model, such as "upper", "lower", "left", "right", "middle" and "one", are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0023] Reference Figures 1-5 A connection structure for a steel wire mesh reinforced composite pipe includes a shell 1 (the upper shell 1 is equipped with a valve, which can change the sealing state of the shell 1 by opening or closing; this is a simple existing technology and will not be described in detail here) and a pipe fitting 2. The two shells 1 are sealed together, and the pipe fitting 2 is disposed between the two shells 1. An adjustment mechanism is provided inside the shell 1. The adjustment mechanism includes a fixing block 3, a sliding rod 4, a magnetic block 5, a heating element 6, and an extraction cylinder 7. The two fixing blocks 3 are respectively fixedly connected to the inner side wall of the shell 1, the two sliding rods 4 are respectively slidably connected to the side wall of the fixing block 3, and the two magnetic blocks 5 are respectively fixedly connected to the two ends of the sliding rod 4. The upper magnetic block... The upper part of the magnetic block 5 has a protrusion, and the lower magnetic block 5 has a groove corresponding to the protrusion. The protrusion and groove have a large area. The magnetic properties of the two magnets are opposite at the contact point and they attract each other. The magnetic block 5 is an AlNiCo magnet with high mechanical strength and tensile strength, as well as good machinability, which is sufficient to generate enough strength to ensure the stability of the movement. The two heating elements 6 are fixedly connected to the inner wall of the tube 2. The heating elements 6 are made of copper sheets and other materials with good electrical and thermal conductivity. They can induce eddy currents and heat up due to the changing magnetic field, and quickly transfer the heat to the plastic to melt it. The extraction cylinder 7 is fixedly connected to the side wall of the upper fixing block 3.

[0024] A U-shaped frame 8 is fixedly connected to the side wall of the upper housing 1. A motor 9 is fixedly connected to the inner side wall of the U-shaped frame 8. A turntable 10 is fixedly connected to the output end of the motor 9. A push rod 11 is fixedly connected to the side wall of the magnetic block 5 near the turntable 10. A connecting rod 12 is hinged between the push rod 11 and the turntable 10.

[0025] A piston plate 13 is slidably connected to the inner wall of the extraction cylinder 7. An extraction rod 14 is fixedly connected to the side wall of the piston plate 13. The extraction rod 14 is slidably connected to one side wall of the extraction cylinder 7. The extraction rod 14 and the extraction cylinder 7 are not sealed. A pressing plate 15 is fixedly connected to the end of the extraction rod 14 away from the piston plate 13. The magnetic block 5 near the turntable 10 is slidably connected to the pressing plate 15. A return spring 20 is fixedly connected between the pressing plate 15 and the extraction cylinder 7.

[0026] An air inlet pipe 16 and an air outlet pipe 17 are fixedly connected to the side wall of the extraction cylinder 7. Both the air inlet pipe 16 and the air outlet pipe 17 are equipped with one-way valves. The gas flow direction of the one-way valve in the air inlet pipe 16 is from inside the housing 1 to inside the extraction cylinder 7, and the gas flow direction of the one-way valve in the air outlet pipe 17 is from the extraction cylinder 7 to the outside. Arc-shaped blocks 18 are fixedly connected to both ends of the housing 1. An air bladder 19 is fixedly connected to the inner side wall of the arc-shaped blocks 18. The air bladder 19 protrudes from the arc-shaped blocks 18. The inner diameter of the two arc-shaped blocks 18 after they are closed is close to the outer diameter of the pipe to be connected. The protruding air bladder 19 will adhere to the gap between the two and produce a preliminary seal.

[0027] In this invention, during use, the two pipes to be connected are tightly fitted into the fitting 2, ensuring a close fit. Then, the centers of the two housings 1 are aligned with the centers of the fitting 2 and brought together. The protrusion on the lower magnetic block 5 is inserted into the corresponding groove of the upper magnetic block 5, and the magnetic blocks 5 on both sides attract each other, generating a certain fixing force. The arc-shaped blocks 18 and airbags 19 on both sides adhere to the pipes, and the protruding airbags 19 adhere to the pipes, forming a preliminary seal. Then, the motor 9 is started, and the rotation of the motor 9 drives the turntable 10 to rotate. The turntable 10 drives the connecting rod 12 and the push rod 11 to reciprocate. The push rod 11 drives the magnetic block 5 near the motor 9 to reciprocate. The magnetic block 5 near the motor 9 drives the magnetic block 5 on the other side to reciprocate via the slide rod 4. The magnetic blocks 5 on both sides move rapidly back and forth above the heating plates 6 on both sides, generating a changing magnetic field. This generates eddy currents within the heating plates 6, heating and melting the plastic on the pipes and fittings 2. When the magnetic blocks 5 approach the extraction cylinder 7, they squeeze the extrusion plate 15. The extrusion plate 15 drives the extraction rod 14 and piston plate 13 towards the bottom of the extraction cylinder 7, compressing the return spring 20. The one-way valve in the air inlet pipe 16 closes, and the one-way valve in the air outlet pipe 17 opens, allowing the gas in the extraction cylinder 7 to be discharged to the outside through the air outlet pipe 17. When the magnetic blocks 5 move away from the extraction cylinder 7, the pressure on the extrusion plate 15 disappears. Under the elastic force of the return spring 20, the extrusion plate 15 drives the piston plate 13 to return to its original position via the slide rod 4. The one-way valve in the air inlet pipe 16 opens, and the one-way valve in the air outlet pipe... When the one-way valve inside 17 closes, the air between fitting 2 and housing 1 enters the extraction cylinder 7 through the air inlet pipe 16. With the continuous reciprocating motion of the magnetic block 5, the air between fitting 2 and housing 1 is quickly expelled. Because the space between fitting 2 and housing 1 is very small, there is very little air. The connection between the pipe and fitting 2 is relatively tight, and the airbag 19 is also tightly attached to the pipe, so air infiltration is relatively slow. Therefore, the air between fitting 2 and housing 1 is quickly expelled, creating a negative pressure inside. This causes the airbag 19 to inflate, further increasing the sealing. When the inside of housing 1 is under negative pressure, the return spring 20 cannot return to its original position due to the pressure. The reciprocating motion of the magnetic block 5 no longer contacts the extrusion plate 15 until a certain amount of gas infiltrates into housing 1 again. The two housings 1 then return to a state of negative pressure. Under pressure, the connection becomes tighter, and the thin air inside significantly reduces heat loss. External wind cannot affect the surface of pipe fitting 2, and at the same time, the wind cannot blow onto the inner wall of the pipe. Therefore, pipe fitting 2 is heated evenly without external influence. The plastic is stably clad under the heating of heating plate 6, and the cladding effect is good. After heating is completed, the thin air also significantly reduces heat loss, and heat is only discharged from the side wall and inner wall of the pipe. Pipe fitting 2 cools and shrinks slowly and stably, avoiding uneven temperature distribution caused by wind and local shrinkage cracking caused by rapid cooling. The connection effect is good. After natural cooling is completed, pull the valve on shell 1 to allow gas to enter. At this time, the internal pressure is balanced with the external pressure, and the two shells 1 can be easily separated to continue connecting the next pipe.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A connection structure for a steel wire mesh reinforced composite pipe, comprising a shell (1) and a pipe fitting (2), characterized in that, The pipe fitting (2) is disposed between the two housings (1); The housing (1) is provided with an adjustment mechanism, which includes a fixing block (3), a sliding rod (4), a magnetic block (5), a heating element (6), and an extraction cylinder (7). The two fixing blocks (3) are respectively fixedly connected to the inner side wall of the housing (1), the two sliding rods (4) are respectively slidably connected to the side wall of the fixing block (3), the two magnetic blocks (5) are respectively fixedly connected to the two ends of the sliding rod (4), the two heating elements (6) are respectively fixedly connected to the inner side wall of the pipe (2), and the extraction cylinder (7) is fixedly connected to the side wall of the fixing block (3) located above.

2. The connection structure of a steel wire mesh reinforced composite pipe according to claim 1, characterized in that, A U-shaped frame (8) is fixedly connected to the side wall of the upper housing (1), a motor (9) is fixedly connected to the inner side wall of the U-shaped frame (8), and a turntable (10) is fixedly connected to the output end of the motor (9).

3. The connection structure of a steel wire mesh reinforced composite pipe according to claim 2, characterized in that, A push rod (11) is fixedly connected to the side wall of the magnetic block (5) near the turntable (10), and a connecting rod (12) is hinged between the push rod (11) and the turntable (10).

4. The connection structure of a steel wire mesh reinforced composite pipe according to claim 2, characterized in that, A piston plate (13) is slidably connected to the inner wall of the extraction cylinder (7), and an extraction rod (14) is fixedly connected to the side wall of the piston plate (13). The extraction rod (14) is slidably connected to one side wall of the extraction cylinder (7), and a pressing plate (15) is fixedly connected to the end of the extraction rod (14) away from the piston plate (13). The magnetic block (5) near the turntable (10) is slidably connected to the pressing plate (15).

5. The connection structure of a steel wire mesh reinforced composite pipe according to claim 1, characterized in that, An air inlet pipe (16) and an air outlet pipe (17) are fixedly connected to the side wall of the extraction tube (7). A one-way valve is provided in both the air inlet pipe (16) and the air outlet pipe (17). An arc-shaped block (18) is fixedly connected to both ends of the housing (1). An air bag (19) is fixedly connected to the inner side wall of the arc-shaped block (18).

6. The connection structure of a steel wire mesh reinforced composite pipe according to claim 4, characterized in that, A return spring (20) is fixedly connected between the extrusion plate (15) and the extraction cylinder (7).

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