A high-temperature experimental device for plastic-coated steel pipes

Abstract

This utility model discloses a high-temperature experimental device for plastic-coated steel pipes, relating to the field of performance testing technology for plastic-coated steel pipes. The utility model includes a furnace body and a furnace door mounted on the furnace body. An exhaust vent is connected to the furnace body. Two adjustable-spaced frames are installed inside the furnace body. A drive disc is rotatably mounted on each frame. A positioning ring and a fixing pipe are mounted on the drive disc. The free end of the fixing pipe penetrates the furnace body. One of the free ends of the fixing pipe is connected to an inlet pipe via a rotary joint. The inlet pipe connects to an external medium storage tank. In use, this utility model ensures uniform circumferential heat distribution in the plastic-coated steel pipe, preventing localized overheating and carbonization of the plastic anti-corrosion layer. It also simulates the dynamic temperature field and potential chemical corrosion environment when the plastic-coated steel pipe is actually transporting high-temperature fluid media. Therefore, it can comprehensively and realistically reflect the performance of the plastic-coated steel pipe under high-temperature conditions, improving the accuracy of product quality assessment and thus enhancing its practicality.

Description

Technical Field

[0001] This utility model relates to the field of performance testing technology for plastic-coated steel pipes, specifically to a high-temperature experimental device for plastic-coated steel pipes. Background Technology

[0002] Plastic-coated steel pipe (also known as steel-plastic composite pipe) is a composite pipe made by using steel pipe as the base material and forming a plastic anti-corrosion layer on its inner or inner surfaces through processes such as spraying, rotational molding, impregnation or adsorption. This structure gives plastic-coated steel pipe excellent corrosion resistance and low fluid transport friction resistance.

[0003] To ensure product quality, plastic-coated steel pipes undergo multiple performance tests during production. Among these, the high-temperature test is a key component for evaluating the stability of the plastic anti-corrosion layer under high-temperature conditions. Currently, the industry commonly uses an oven to heat the test samples; however, this method has significant drawbacks: 1. Uneven heating: The heating of the oven can easily lead to uneven heat distribution around the steel pipe, causing local overheating of the plastic anti-corrosion layer and carbonization.

[0004] 2. Unable to simulate real service environment: The static heating method of the oven cannot synchronously simulate the dynamic temperature field and potential chemical corrosion environment when the high-temperature fluid medium is actually transported in the pipeline.

[0005] The aforementioned limitations make it difficult for oven-based high-temperature experiments to comprehensively and accurately reflect the performance of plastic-coated steel pipes under high-temperature conditions, thus restricting the accuracy of product quality assessment. Therefore, a high-temperature experimental device for plastic-coated steel pipes is proposed. Utility Model Content

[0006] The purpose of this utility model is to provide a high-temperature experimental device for plastic-coated steel pipes in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution: A high-temperature experimental device for plastic-coated steel pipes includes a furnace body and a furnace door mounted on the furnace body. An exhaust vent is connected to the furnace body. Two adjustable-spaced frames are installed inside the furnace body. A drive disc is rotatably mounted on each frame. A positioning ring and a fixing pipe are mounted on the drive disc. The free end of the fixing pipe penetrates the furnace body. One of the free ends of the fixing pipe is connected to an inlet pipe via a rotary joint. The inlet pipe is connected to an external medium storage tank. A drive component is mounted on the furnace body to rotate one of the drive discs. A sliding frame is slidably mounted on the furnace body, and a heating element is mounted on the sliding frame.

[0008] Furthermore, a limiting ring is provided inside the exhaust vent, and a filter screen is detachably installed on the limiting ring.

[0009] Furthermore, the furnace door is provided with an observation window, and the observation window is fitted with high-temperature resistant glass.

[0010] Furthermore, a collection trough is provided inside the furnace body, and a discharge pipe that penetrates the furnace body is connected to the collection trough. A valve is provided on the discharge pipe.

[0011] Furthermore, the driving component includes a drive motor mounted on the furnace body, a small gear mounted on the output shaft of the drive motor, and a large gear meshing with the small gear mounted on the drive disk.

[0012] Furthermore, the heating element includes a gas pipe and a plurality of flame guns, all mounted on a sliding frame. The flame guns are connected to the gas pipes via connecting pipes, and the gas pipes are connected to an external gas source.

[0013] Furthermore, the drive disk is provided with a protruding ring, and the positioning ring is detachably mounted on the protruding ring.

[0014] Furthermore, the positioning ring is provided with an annular groove, and a sealing ring is movably engaged in the annular groove. A ceramic sealing ring is detachably provided on the drive disc.

[0015] The beneficial effects of this utility model are as follows: When in use, this utility model can make the circumferential heat distribution of the plastic-coated steel pipe uniform, avoid local overheating and carbonization of the plastic anti-corrosion layer, and at the same time, it can simulate the dynamic temperature field and potential chemical corrosion environment when the plastic-coated steel pipe is actually transporting high-temperature fluid media. Thus, it can comprehensively and realistically reflect the performance of the plastic-coated steel pipe under high-temperature conditions, improve the accuracy of product quality assessment, and therefore has greater practicality. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural view of the present invention; Figure 2 This is a three-dimensional sectional view of the present invention; Figure 3 This is a utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This is a utility model Figure 2 Enlarged view of point B in the middle; Figure 5 This is a utility model Figure 2 Enlarged view of point C in the middle; Figure 6 This is a three-dimensional sectional view of the present invention from another perspective; Figure 7 This is a utility model Figure 6 Enlarged view of point D in the middle.

[0017] Reference numerals in the attached diagram: 1. Furnace body; 2. Furnace door; 3. Exhaust vent; 4. Frame; 5. Drive disc; 6. Positioning ring; 7. Fixing pipe; 8. Rotary joint; 9. Inlet pipe; 10. Sliding frame; 11. Limiting ring; 12. Filter screen; 13. Observation window; 14. High-temperature resistant glass; 15. Collection tank; 16. Discharge pipe; 17. Valve; 18. Drive motor; 19. Pinion; 20. Gear; 21. Gas pipe; 22. Flame gun; 23. Connecting pipe; 24. Protruding ring; 25. Annular groove; 26. Sealing ring; 27. Ceramic sealing ring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0019] like Figures 1-7 As shown, an embodiment of the present invention provides a high-temperature experimental device for plastic-coated steel pipes, including a furnace body 1 and a furnace door 2 disposed on the furnace body 1. An opening is constructed on one side of the furnace body 1, and the furnace door 2 is installed at the opening by a hinge. The distinguishing technical features of this utility model also include: an exhaust port 3 connected to the furnace body 1, the exhaust port 3 being located at the top of the furnace body 1; two adjustable-spaced frames 4 installed inside the furnace body 1, one frame 4 fixed inside the furnace body 1, and the other frame 4 slidably installed inside the furnace body 1 in a horizontal direction; a first cylinder fixed in a horizontal direction on the furnace body 1, the movable end of the first cylinder being connected to the slidable frame 4; a drive disc 5 rotatably mounted on the frame 4, the axis of the drive disc 5 being in a horizontal direction; a positioning ring 6 and a fixing tube 7 installed on the drive disc 5; the positioning ring 6, the fixing tube 7, and the drive disc 5 being coaxial. The free end of the fixed pipe 7 passes through the furnace body 1. One of the free ends of the fixed pipe 7 is connected to the inlet pipe 9 through the rotary joint 8. The inlet pipe 9 is connected to the external medium storage tank, which is not shown in the attached drawings of the instruction manual. The furnace body 1 is provided with a driving component for driving one of the driving discs 5 to rotate. A sliding frame 10 is slidably provided on the furnace body 1. The sliding frame 10 slides in the horizontal direction. A second cylinder in the horizontal direction is fixed on the furnace body 1. The movable end of the second cylinder is connected to the sliding frame 10. A heating element is provided on the sliding frame 10. The heating element is used to heat the outer surface of the plastic-coated steel pipe. In the initial state, furnace door 2 is closed, and the movable ends of the first and second cylinders are retracted. The sliding frame 4 and sliding bracket 10 are both in their initial positions, with a large gap between the two frames 4. During the experiment, furnace door 2 is opened, causing one end of the plastic-coated steel pipe to abut against the drive disc 5 on the fixed frame 4, with the positioning ring 6 engaging with the inner surface of the plastic-coated steel pipe. Then, the movable end of the first cylinder extends, driving the sliding frame 4 to slide to its limit position until the drive disc 5 on the sliding frame 4 abuts against the other end of the plastic-coated steel pipe, with the positioning ring 6 engaging with the inner surface of the plastic-coated steel pipe. Next, the movable end of the second cylinder extends, driving the sliding bracket 10 to slide to its near limit position, bringing the heating element closer to the outer surface of the plastic-coated steel pipe. Then, furnace door 2 is closed, and the drive mechanism drives one of the drive discs 5 to rotate, causing the plastic-coated steel pipe, the other drive disc 5, the two positioning rings 6, and the two fixed pipes 7 to rotate together. Meanwhile, fluid medium is supplied to the inlet pipe 9 through an external medium storage tank. The rotary joint 8 can prevent the inlet pipe 9 from twisting. The fluid medium enters the plastic-coated steel pipe through one of the fixed pipes 7 and then exits through the other fixed pipe 7. The outer surface of the rotating plastic-coated steel pipe is heated by the heating element to make the circumferential heat distribution of the plastic-coated steel pipe uniform, avoiding local overheating and carbonization of the plastic anti-corrosion layer. At the same time, it can simulate the dynamic temperature field and potential chemical corrosion environment when the plastic-coated steel pipe is actually transporting high-temperature fluid medium. This can comprehensively and realistically reflect the performance of the plastic-coated steel pipe under high-temperature conditions and improve the accuracy of product quality assessment. The exhaust gas and impurities generated during the experiment are discharged from the furnace body 1 through the exhaust port 3. After the experiment, the driving element and the heating element stop working, the fluid medium is stopped, and the plastic-coated steel pipe is allowed to cool down. The moving ends of the second cylinder and the first cylinder are retracted, and the plastic-coated steel pipe can be removed. In summary, this utility model can ensure uniform circumferential heat distribution in the plastic-coated steel pipe during use, preventing localized overheating and carbonization of the plastic anti-corrosion layer. Simultaneously, it can simulate the dynamic temperature field and potential chemical corrosion environment of the plastic-coated steel pipe when actually transporting high-temperature fluid media. Therefore, it can comprehensively and realistically reflect the performance of the plastic-coated steel pipe under high-temperature conditions, improving the accuracy of product quality assessment and thus making it more practical.

[0020] like Figure 5 As shown, a further technical solution of this utility model is disclosed. A limiting ring 11 is provided in the exhaust port 3. The limiting ring 11 is horizontal and fixed in the exhaust port 3. A filter screen 12 is detachably provided on the limiting ring 11. The filter screen 12 is horizontal and has a stepped surface. The stepped surface abuts and overlaps with the limiting ring 11. The filter screen 12 has multiple through holes. The limiting ring 11 has a number of threaded holes equal to the number of through holes. A bolt that is threaded and engaged with the threaded hole is movably inserted in the through hole. That is, the filter screen 12 is detachably provided on the limiting ring 11 by multiple bolts. Referring to the above, in the initial state, the filter screen 12 is in the installed state. When exhaust gas and impurities are discharged from the furnace body 1 through the exhaust port 3, the filter screen 12 can play a filtering role, preventing the plasticized particles from escaping and making the experimental environment cleaner. After the experiment, the filter screen 12 can be disassembled for cleaning.

[0021] like Figure 1 As shown, a further technical solution of this utility model is disclosed. An observation window 13 is constructed on the furnace door 2, and a high-temperature resistant glass 14 is provided inside the observation window 13. The high-temperature resistant glass 14 is fixed inside the observation window 13. Referring to the above, when using it, the experimenters can directly observe the experimental process through the high-temperature resistant glass 14, so as to react and operate accordingly in a timely manner, making it more convenient to use.

[0022] like Figure 2 As shown, a further technical solution of the present utility model is disclosed. A collection trough 15 is provided inside the furnace body 1. The collection trough 15 is fixed at the bottom of the furnace body 1. The inner bottom surface of the collection trough 15 is conical to facilitate the discharge of waste. A discharge pipe 16 that penetrates the furnace body 1 is connected to the collection trough 15. The discharge pipe 16 is vertical. A valve 17 is provided on the discharge pipe 16 and is fixed on the discharge pipe 16. Referring to the above, in the initial state, valve 17 is closed. During use, waste liquid and molten plastic are collected through collection tank 15. After the experiment, valve 17 is opened and waste is discharged through discharge pipe 16 to avoid waste contamination of furnace body 1 and to make the experimental environment cleaner.

[0023] like Figure 4 As shown, the specific structure of the driving component of this utility model is disclosed. The driving component includes a driving motor 18 mounted on the furnace body 1. The driving motor 18 is fixed on the furnace body 1 and its output shaft is in the horizontal direction. A small gear 19 is mounted on the output shaft of the driving motor 18. The small gear 19 is fixed on the output shaft of the driving motor 18 and the two are coaxially distributed. A large gear 20 that meshes with the small gear 19 is mounted on the driving disk 5. The large gear 20 is fixed on the driving disk 5 and the two are coaxially distributed. There is a certain transmission ratio between the small gear 19 and the large gear 20. If the large gear 20 needs to rotate one revolution, the small gear 19 needs to rotate multiple revolutions to form a speed reduction structure. Referring to the above, when in use, the drive motor 18 is turned on, the output shaft rotates, and the small gear 19 rotates together. The large gear 20 will rotate due to meshing and drive the drive disk 5 to rotate, thereby driving the drive disk 5 to rotate slowly and uniformly, so as to avoid the speed being too fast and affecting the heating effect and stability.

[0024] like Figure 7As shown, the specific structure of the heating element of this utility model is disclosed. The heating element includes a gas pipe 21 and a plurality of flame guns 22, which are all disposed on the sliding frame 10. The gas pipe 21 and the plurality of flame guns 22 are all fixed on the sliding frame 10. The plurality of flame guns 22 are evenly distributed. The flame guns 22 are connected to the gas pipe 21 through a connecting pipe 23. The gas pipe 21 is connected to an external gas source, which is not shown in the accompanying drawings. Referring to the above, when in use, the gas pipe 21 is connected to an external gas source, and gas is supplied into the gas pipe 21 through the external gas source. The gas is split into multiple streams in the gas pipe 21 and enters multiple flame guns 22 through multiple connecting pipes 23. The flame guns 22 work to burn the gas to form a flame and spray the flame onto the outer surface of the plastic-coated steel pipe, thereby uniformly heating the outer surface of the plastic-coated steel pipe.

[0025] like Figure 3 As shown, a further technical solution of this utility model is disclosed. A protruding ring 24 is provided on the drive disk 5. The protruding ring 24 is fixed on the drive disk 5 and the two are coaxially distributed. A positioning ring 6 is detachably provided on the protruding ring 24. The positioning ring 6 has a stepped surface. The stepped surface and the protruding ring 24 abut and overlap. The positioning ring 6 is constructed with multiple through holes. The protruding ring 24 is constructed with a number of threaded holes equal to the number of through holes. A bolt that is threadedly engaged with the threaded hole is movably inserted in the through hole. That is, the positioning ring 6 is detachably provided on the protruding ring 24 by multiple bolts. Referring to the above, in the initial state, the positioning ring 6 is installed on the protruding ring 24. During use, the positioning ring 6 can be disassembled and replaced with positioning rings of different sizes to adapt to plastic-coated steel pipes with different inner diameters, thereby improving the flexibility and applicability of use.

[0026] like Figure 3 As shown, a further technical solution of this utility model is disclosed. The positioning ring 6 is constructed with an annular groove 25, which is coaxially distributed with the positioning ring 6. A sealing ring 26 is movably engaged in the annular groove 25. In its natural state, the sealing ring 26 is partially engaged in the annular groove 25. A ceramic sealing ring 27 is detachably disposed on the drive disk 5, which is coaxially distributed with the drive disk 5. The drive disk 5 is constructed with coaxially distributed embedding grooves, which are constructed with multiple threaded holes. The ceramic sealing ring 27 is constructed with through holes of the same number as the threaded holes. Bolts that are threadedly engaged with the threaded holes are movably inserted into the through holes. That is, the ceramic sealing ring 27 is detachably disposed on the drive disk 5 by multiple bolts. Referring to the above, in the initial state, the sealing ring 26 is partially engaged in the annular groove 25, and the ceramic sealing ring 27 is in the installed state and located in the embedded groove. During use, the end of the plastic-coated steel pipe and the ceramic sealing ring 27 abut and overlap. The sealing ring 26 will deform under the pressure of the inner surface of the plastic-coated steel pipe. The sealing ring 26 and the ceramic sealing ring 27 form a double sealing structure, which improves the sealing performance. After the experiment, the sealing ring 26 can be removed from the annular groove 25 to facilitate the replacement of the new sealing ring 26. The ceramic sealing ring 27 can be disassembled and removed from the embedded groove to facilitate the replacement of the new ceramic sealing ring 27.

[0027] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high temperature experimental device for plastic coated steel pipe, comprising a furnace body (1) and a furnace door (2) arranged on the furnace body (1), characterized in that, The furnace body (1) is connected to an exhaust port (3). Two adjustable-spaced frames (4) are installed inside the furnace body (1). A drive plate (5) is rotatably installed on the frame (4). A positioning ring (6) and a fixing pipe (7) are installed on the drive plate (5). The free end of the fixing pipe (7) passes through the furnace body (1). One of the free ends of the fixing pipe (7) is connected to an inlet pipe (9) through a rotary joint (8). The inlet pipe (9) is connected to an external medium storage tank. A drive component for driving one of the drive plates (5) to rotate is installed on the furnace body (1). A sliding frame (10) is slidably installed on the furnace body (1). A heating element is installed on the sliding frame (10).

2. The high temperature test apparatus for a coated steel pipe according to claim 1, wherein A limiting ring (11) is provided inside the exhaust port (3), and a filter screen (12) is detachably provided on the limiting ring (11).

3. The high temperature test apparatus for a coated steel pipe according to claim 1, wherein The furnace door (2) is provided with an observation window (13), and the observation window (13) is provided with high temperature resistant glass (14).

4. The high temperature test apparatus for a plastic coated steel pipe according to claim 1, wherein The furnace body (1) is provided with a collection tank (15), and the collection tank (15) is connected to a discharge pipe (16) that penetrates the furnace body (1). A valve (17) is provided on the discharge pipe (16).

5. The high temperature test apparatus for a plastic coated steel pipe according to claim 1, wherein The driving component includes a drive motor (18) mounted on the furnace body (1), a small gear (19) mounted on the output shaft of the drive motor (18), and a large gear (20) mounted on the drive disk (5) that meshes with the small gear (19).

6. The high temperature test apparatus for a plastic coated steel pipe according to claim 1, wherein The heating element includes a gas pipe (21) and a plurality of flame guns (22) all mounted on the sliding frame (10). The flame guns (22) are connected to the gas pipes (21) via connecting pipes (23), and the gas pipes (21) are connected to an external gas source.

7. The high temperature test apparatus for a coated steel pipe according to claim 1, wherein The drive disk (5) is provided with a protruding ring (24), and the positioning ring (6) is detachably provided on the protruding ring (24).

8. The high temperature test apparatus for a plastic coated steel pipe according to claim 1, wherein The positioning ring (6) has an annular groove (25) and a sealing ring (26) is movably locked inside the annular groove (25). A ceramic sealing ring (27) is detachably installed on the drive disc (5).

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