Molding device for processing plastic-lined steel pipe

Abstract

The utility model discloses a forming device for processing a plastic-lined steel pipe, which belongs to the field of plastic-lined steel pipe processing and comprises a plastic-lined steel pipe processing base, a heating mechanism is arranged at the top of the plastic-lined steel pipe processing base, and a plastic-lined steel pipe forming part is arranged in the heating mechanism. The plastic pipeline can be automatically filled with high-pressure gas when the steel pipe layer and the plastic layer of the plastic-lined steel pipe forming part are heated, the plastic layer can be better attached to the inner wall of the steel pipe through the high-pressure gas, meanwhile, sufficient diffusion and permeation of a binding agent between the plastic layer and the steel pipe are promoted, and therefore the binding force between the plastic layer and the steel pipe is enhanced; the gas pressure and the gas flow are adjusted, so that the phenomenon of layering or stripping between the plastic layer and the steel pipe in the subsequent cooling and using process can be avoided, and the distribution and the thickness of the plastic layer on the inner wall of the steel pipe can be controlled by adjusting the gas pressure and the gas flow, so that the uniformity and the flatness of the plastic layer are ensured.

Description

Technical Field

[0001] This utility model belongs to the field of plastic-lined steel pipe processing technology, and specifically relates to a forming device for processing plastic-lined steel pipes. Background Technology

[0002] Plastic-lined steel pipe is a composite pipe that combines the advantages of steel pipe and plastic pipe. During the molding process, the steel pipe needs to be heated. During the heating process, the plastic pipe softens and bonds with the inner wall of the steel pipe, thus forming the plastic-lined steel pipe.

[0003] When the plastic layer of existing plastic-lined steel pipes is inserted into the steel pipe, there are still some gaps or even air bubbles. If these problems are not addressed, the adhesion between the steel pipe and the plastic layer will become weak after heating. In severe cases, it may even lead to delamination or peeling between the plastic layer and the steel pipe during subsequent cooling and use, which will reduce the molding quality of the plastic-lined steel pipe. Utility Model Content

[0004] The purpose of this utility model is to provide a forming device for processing plastic-lined steel pipes, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a forming device for processing plastic-lined steel pipes, comprising a plastic-lined steel pipe processing base, a heating mechanism being provided on the top of the plastic-lined steel pipe processing base, a plastic-lined steel pipe forming component being provided inside the heating mechanism, and an inflation mechanism being provided on the front side of the plastic-lined steel pipe processing base.

[0006] The inflation mechanism includes a high-pressure air pump. The rear end face of the high-pressure air pump is fixedly connected to the front end face of the plastic-lined steel pipe processing base. An airflow diversion pipe is fixedly connected to the front end face of the high-pressure air pump. Inlet pipes are fixedly connected to both outer walls of the airflow diversion pipe. A telescopic hose is fixedly connected to one end of the inlet pipe. A connecting pipe is fixedly connected to one end of the telescopic hose. An inflation pipe is fixedly connected to one end of the connecting pipe.

[0007] A servo motor is detachably connected to one side of the plastic-lined steel pipe processing base via mounting screws. A bidirectional lead screw is fixedly installed at the output end of the servo motor via a coupling. A moving block is threadedly connected to the outer wall of the bidirectional lead screw. The moving block is mounted inside a groove on the top outer wall of the plastic-lined steel pipe processing base via bearings. A guide rod is slidably connected inside the moving block, and the guide rod completely penetrates the moving block. The guide rod is fixedly installed inside the groove. A support rod is welded to the top of the guide rod. A baffle is fixedly connected to the top of the support rod. A sealing tube is fixedly connected to the inner wall of the baffle. The inner wall of the sealing tube is fixedly connected to the outer wall of the inflation tube. The inflation tube is used to inflate the inside of the plastic tube of the plastic-lined steel pipe molding part.

[0008] In a preferred embodiment, the inside of the connecting pipe is connected to a regulating valve, and a pressure gauge is fixedly connected to the outer wall of the connecting pipe.

[0009] In one preferred embodiment, the plastic-lined steel pipe is composed of a plastic pipe and a steel pipe, with the steel pipe located on the outer wall of the plastic pipe.

[0010] In a preferred embodiment, the heating mechanism includes a first fixed sleeve, the bottom of which is fixedly installed together with the top of the plastic-lined steel pipe processing base. A second fixed sleeve is hinged to the top of the first fixed sleeve. Both the first and second fixed sleeves have arc-shaped grooves on their inner sides. A heating plate is fixedly connected inside the arc-shaped grooves. After the heating plate is energized and conducts heat, it heats the steel pipe layer of the plastic-lined steel pipe forming part.

[0011] In a preferred embodiment, a first connecting block is fixedly connected to the front side of the first fixing sleeve, a second connecting block is fixedly connected to the front side of the second fixing sleeve, an insert block is fixedly connected to the bottom of the second connecting block, and a slot and a guide groove are formed inside the first connecting block. The slot and the guide groove are integrally formed, and the slot matches the insert block.

[0012] In a preferred embodiment, a set screw is fixedly connected inside the guide groove, a spring is fixedly connected to one end of the set screw, the spring is slidably connected inside the guide groove, a positioning steel ball is fixedly connected to one end of the spring, and an arc-shaped positioning groove matching the positioning steel ball is opened on the outer wall of the insert block.

[0013] In a preferred embodiment, a heat-insulating handle is fixedly connected to the top of the first fixing sleeve, and the number of heat-insulating handles is two.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This molding device for processing plastic-lined steel pipes, through the inclusion of an inflation mechanism, automatically fills the plastic pipe with high-pressure gas during the heating of the steel pipe layer and plastic layer of the molded plastic-lined steel pipe. The high-pressure gas allows the plastic layer to better adhere to the inner wall of the steel pipe, while simultaneously promoting the full diffusion and penetration of the adhesive between the plastic layer and the steel pipe, thereby enhancing the bonding strength between the two. This helps to prevent delamination or peeling between the plastic layer and the steel pipe during subsequent cooling and use. The high-pressure gas also plays a role in uniformly distributing the plastic layer during the lining process. By adjusting the gas pressure and flow rate, the distribution and thickness of the plastic layer on the inner wall of the steel pipe can be controlled, thereby ensuring the uniformity and flatness of the plastic layer. This helps to improve the corrosion resistance and service life of the plastic-lined steel pipe.

[0016] This molding device for processing plastic-lined steel pipes can be designed as a fixed sleeve by setting an inlet mechanism, which fixes the heating element when heating the plastic-lined steel pipe molding part. The auxiliary inflation mechanism inflates the plastic tube inside the plastic-lined steel pipe molding part to prevent the inflation position from shifting. Attached Figure Description

[0017] Figure 1 This is a front view of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the inflation mechanism in this utility model;

[0019] Figure 3 This is a schematic diagram of the heating mechanism in this utility model;

[0020] Figure 4 This utility model Figure 1 Enlarged view of point A in the middle.

[0021] In the diagram: 1. Base for processing plastic-lined steel pipe; 2. Heating mechanism; 3. Molded plastic-lined steel pipe; 4. Inflating mechanism; 5. Heat-insulating handle; 21. First fixing sleeve; 22. Second fixing sleeve; 23. Heating plate; 24. First connecting block; 25. Second connecting block; 26. Insert block; 27. Slot; 28. Spring; 29. ​​Positioning steel ball; 210. Arc-shaped positioning groove; 41. High-pressure air pump; 42. Airflow diversion pipe; 43. Servo motor; 44. Two-way lead screw; 45. Moving block; 46. Guide rod; 47. Support rod; 48. Inlet pipe; 49. Telescopic hose; 410. Connecting pipe; 411. Inflating pipe; 412. Sealing pipe; 413. Baffle; 414. Adjusting valve; 415. Pressure gauge. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments.

[0023] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0024] Please see Figure 1-4 This utility model provides a forming device for processing plastic-lined steel pipes, including a plastic-lined steel pipe processing base 1, a heating mechanism 2 is provided on the top of the plastic-lined steel pipe processing base 1, a plastic-lined steel pipe forming part 3 is provided inside the heating mechanism 2, the plastic-lined steel pipe forming part 3 is composed of a plastic pipe and a steel pipe, the steel pipe is located on the outer wall of the plastic pipe, and an inflation mechanism 4 is provided on the front side of the plastic-lined steel pipe processing base 1.

[0025] like Figure 1 , Figure 2 and Figure 4 As shown, the inflation mechanism 4 includes a high-pressure air pump 41. The rear end face of the high-pressure air pump 41 is fixedly connected to the front end face of the plastic-lined steel pipe processing base 1. An airflow diversion pipe 42 is fixedly connected to the front end face of the high-pressure air pump 41. Inlet pipes 48 are fixedly connected to both outer walls of the airflow diversion pipe 42. A telescopic hose 49 is fixedly connected to one end of the inlet pipe 48. A connecting pipe 410 is fixedly connected to one end of the telescopic hose 49. An inflation pipe 411 is fixedly connected to one end of the connecting pipe 410. A servo motor 43 is detachably connected to one side of the plastic-lined steel pipe processing base 1 via mounting screws. A bidirectional lead screw 4 is fixedly mounted to the output end of the servo motor 43 via a coupling. 4. A movable block 45 is threadedly connected to the outer wall of the double-acting screw 44. The movable block 45 is mounted inside a groove on the top outer wall of the plastic-lined steel pipe processing base 1 via bearings. A guide rod 46 is slidably connected inside the movable block 45, completely penetrating the movable block 45. The guide rod 46 is fixedly installed inside the groove. A support rod 47 is welded to the top of the guide rod 46. A baffle 413 is fixedly connected to the top of the support rod 47. A sealing tube 412 is fixedly connected to the inner wall of the baffle 413. The inner wall of the sealing tube 412 is fixedly connected to the outer wall of the inflation tube 411. The inflation tube 411 is used to inflate the inside of the plastic tube of the plastic-lined steel pipe molding part 3. A regulating valve 414 is connected to the inside of the connecting pipe 410. A pressure gauge 415 is fixedly connected to the outer wall of the connecting pipe 410. The regulating valve 414 is used to regulate the flow rate of the gas in the pipeline, and the pressure gauge 415 is used to display the gas pressure inside the pipeline.

[0026] like Figure 1 and Figure 3As shown, the heating mechanism 2 includes a first fixing sleeve 21, the bottom of which is fixedly installed with the top of the plastic-lined steel pipe processing base 1. A second fixing sleeve 22 is hinged to the top of the first fixing sleeve 21. Both the first fixing sleeve 21 and the second fixing sleeve 22 have arc-shaped grooves on their inner sides. A heating plate 23 is fixedly connected inside the arc-shaped grooves. After the heating plate 23 is energized and conducts heat, it heats the steel pipe layer of the plastic-lined steel pipe forming part 3. A first connecting block 24 is fixedly connected to the front side of the first fixing sleeve 21, and a second connecting block 25 is fixedly connected to the front side of the second fixing sleeve 22. An insert block 26 is fixedly connected to the bottom of the second connecting block 25. The first connecting block 24 has a slot 27 and a guide groove inside. The slot 27 and the guide groove are integrally formed, and the slot 27 matches the insert block 26. A set screw is fixedly connected inside the guide groove. A spring 28 is fixedly connected to one end of the set screw. The spring 28 is slidably connected inside the guide groove. A positioning steel ball 29 is fixedly connected to one end of the spring 28. An arc-shaped positioning groove 210 matching the positioning steel ball 29 is opened on the outer wall of the insert block 26. Two heat-insulating handles 5 are fixedly connected to the top of the first fixing sleeve 21. The heat-insulating handles 5 facilitate the operator to separate the first fixing sleeve 21 from the second fixing sleeve 22, and at the same time prevent the first fixing sleeve 21 and the second fixing sleeve 22 from burning the operator's hands when heated.

[0027] The first fixing sleeve 21 and the second fixing sleeve 22 form a pipe clamp to limit the plastic-lined steel pipe molding 3. The auxiliary inflation tube 411 inflates the plastic tube inside the plastic-lined steel pipe molding 3. Both the first fixing sleeve 21 and the second fixing sleeve 22 are made of insulating material to avoid leakage. When the first fixing sleeve 21 and the second fixing sleeve 22 are connected together, the insert 26 at the bottom of the second connecting block 25 will be inserted into the slot 27 inside the first connecting block 24 to initially limit the first fixing sleeve 21 and the second fixing sleeve 22. The insert 26 inserted into the slot 27 will squeeze the positioning steel ball 29 inside the slot 27. The positioning steel ball 29 will be inserted into the arc-shaped positioning groove 210 opened on the outer wall of the insert 26 through the extension and contraction effect of the spring 28 and the guiding effect of the guide groove, thus performing a secondary effect on the first fixing sleeve 21 and the second fixing sleeve 22. The double limiting effect achieves the fixing effect of the plastic-lined steel pipe molding 3.

[0028] The working principle and usage process of this utility model are as follows: First, the heating plates 23 inside the first fixed sleeve 21 and the second fixed sleeve 22 are externally connected to electricity for heating, allowing the heating plates 23 to heat the plastic-lined steel pipe molding part 3. After heating, the high-pressure air pump 41 and the servo motor 43 can be started respectively. After the high-pressure air pump 41 is started, high-pressure gas is introduced into the air pipe 411 through the configuration of the airflow diversion pipe 42, the inlet pipe 48, the telescopic hose 49 and the connecting pipe 410. After the servo motor 43 is started, it can drive the bidirectional lead screw 44 to rotate. After the bidirectional lead screw 44 rotates, it cooperates with the guide rod 46 to guide the effect. The two moving blocks 45 reciprocate relative to each other. After the two moving blocks 45 reciprocate relative to each other, the two inflation tubes 411 are inserted into the inside of the pipe through the connection of the support rod 47, the sealing tube 412 and the baffle 413 to inflate the pipe. This allows the steel pipe of the plastic-lined steel pipe molding 3 to fully contact the plastic layer, improving the bonding effect. The sealing tube 412 activates the sealing function to prevent air leakage during filling and reduce the inflation effect. The baffle 413 acts as a limit. The telescopic hose 49 has a certain elasticity and telescopic characteristics and can reciprocate with the inflation tubes 411.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A forming device for processing plastic-lined steel pipes, comprising a processing base (1) for plastic-lined steel pipes, characterized in that: The top of the plastic-lined steel pipe processing base (1) is provided with a heating mechanism (2), the interior of the heating mechanism (2) is provided with a plastic-lined steel pipe forming part (3), and the front side of the plastic-lined steel pipe processing base (1) is provided with an inflation mechanism (4). The inflation mechanism (4) includes a high-pressure inflation pump (41). The rear end face of the high-pressure inflation pump (41) is fixedly connected to the front end face of the plastic-lined steel pipe processing base (1). An airflow diversion pipe (42) is fixedly connected to the front end face of the high-pressure inflation pump (41). An inlet pipe (48) is fixedly connected to both outer walls of the airflow diversion pipe (42). A telescopic hose (49) is fixedly connected to one end of the inlet pipe (48). A connecting pipe (410) is fixedly connected to one end of the telescopic hose (49). An inflation pipe (411) is fixedly connected to one end of the connecting pipe (410). A servo motor (43) is detachably connected to one side of the plastic-lined steel pipe processing base (1) via mounting screws. A double-acting lead screw (44) is fixedly mounted on the output end of the servo motor (43) via a coupling. A moving block (45) is threadedly connected to the outer wall of the double-acting lead screw (44). The moving block (45) is mounted inside a groove on the top outer wall of the plastic-lined steel pipe processing base (1) via bearings. A guide rod (46) is slidably connected inside the moving block (45). The guide rod (46) is completely The guide rod (46) is fixedly installed inside the slide groove through the moving block (45). A support rod (47) is welded to the top of the guide rod (46). A baffle (413) is fixedly connected to the top of the support rod (47). A sealing tube (412) is fixedly connected to the inner wall of the baffle (413). The inner wall of the sealing tube (412) is fixedly connected to the outer wall of the inflation tube (411). The inflation tube (411) is used to inflate the inside of the plastic tube of the plastic-lined steel pipe molding part (3).

2. The forming device for processing plastic-lined steel pipes according to claim 1, characterized in that: The inside of the connecting pipe (410) is connected to a regulating valve (414), and a pressure gauge (415) is fixedly connected to the outer wall of the connecting pipe (410).

3. The forming device for processing plastic-lined steel pipes according to claim 1, characterized in that: The plastic-lined steel pipe molding component (3) is composed of a plastic pipe and a steel pipe, with the steel pipe located on the outer wall of the plastic pipe.

4. The forming device for processing plastic-lined steel pipes according to claim 1, characterized in that: The heating mechanism (2) includes a first fixed sleeve (21), the bottom of which is fixedly installed together with the top of the plastic-lined steel pipe processing base (1). The top of the first fixed sleeve (21) is hinged to a second fixed sleeve (22). Both the first fixed sleeve (21) and the second fixed sleeve (22) have arc-shaped grooves on their inner sides. A heating plate (23) is fixedly connected inside the arc-shaped groove. The heating plate (23) heats the steel pipe layer of the plastic-lined steel pipe forming part (3) after being energized and conducting heat.

5. The forming device for processing plastic-lined steel pipes according to claim 4, characterized in that: The first fixing sleeve (21) is fixedly connected to the front side of the first connecting block (24), the second fixing sleeve (22) is fixedly connected to the front side of the second connecting block (25), the bottom of the second connecting block (25) is fixedly connected to the insert block (26), the first connecting block (24) has a slot (27) and a guide groove inside, the slot (27) and the guide groove are integrally formed, and the slot (27) matches the insert block (26).

6. The forming device for processing plastic-lined steel pipes according to claim 5, characterized in that: The guide groove is fixedly connected to a set screw, and a spring (28) is fixedly connected to one end of the set screw. The spring (28) is slidably connected inside the guide groove, and a positioning steel ball (29) is fixedly connected to one end of the spring (28). The outer wall of the insert (26) is provided with an arc-shaped positioning groove (210) that matches the positioning steel ball (29).

7. The forming device for processing plastic-lined steel pipes according to claim 4, characterized in that: The top of the first fixing sleeve (21) is fixedly connected with a heat-insulating handle (5), and there are two heat-insulating handles (5).

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