An oxidation resistance experimental device for plastic coated steel pipe

Abstract

The utility model discloses a kind of plastic-coated steel pipe antioxidation experimental device, it is related to steel pipe experimental technical field;The utility model includes experiment box, its one side is provided with cabinet door, further includes: clamping rotating mechanism, including the first rotating seat of rotating through the side of experiment box, the other side of the experiment box is provided with electric push rod, the piston end of the electric push rod extends in experiment box and is fixed with moving plate;The utility model installs steel pipe in experiment box by clamping rotating mechanism, can drive steel pipe rotation, even spraying salt fog to steel pipe outer wall by spray pipe frame, electric heating rod is heated from steel pipe to steel pipe, salt fog sprayed on steel pipe outer wall will intensify evaporation on hot surface, steam and unevaporated salt fog coexist to form high-temperature saturated salt wet environment, so that the complex environment of high temperature, high humidity, chemical medium erosion etc. Multiple-factor coupling possibly simultaneously existing in actual application in experiment box is simulated, to improve practicality.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe experimental technology, specifically to an anti-oxidation experimental device for plastic-coated steel pipes. Background Technology

[0002] Plastic-coated steel pipes are widely used in petroleum, chemical, water supply and drainage, fire protection, mining and other fields due to their excellent corrosion resistance, wear resistance and long service life. The oxidation (corrosion resistance) performance of its core protective layer - plastic coating (such as epoxy resin, polyethylene, etc.) is the key indicator for evaluating its quality and service life.

[0003] Existing experimental methods, such as salt spray tests and immersion tests, usually use general-purpose equipment (such as salt spray test chambers), which have certain shortcomings. They can usually only simulate a single or a few environmental factors (such as salt spray, constant temperature and humidity), and are difficult to simulate the complex environment of multiple factors coupled together that may exist in actual applications, such as high temperature, high humidity, and chemical media corrosion. Therefore, this utility model proposes an anti-oxidation test device for plastic-coated steel pipes. Utility Model Content

[0004] The purpose of this utility model is to provide an anti-oxidation experimental device for plastic-coated steel pipes in order to solve the problems in the background art.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] An anti-oxidation experimental device for plastic-coated steel pipes includes an experimental chamber with a door on one side, and further includes:

[0007] The clamping and rotating mechanism includes a first rotating seat that rotates through one side of the experimental box, an electric push rod that is provided on the other side of the experimental box, the piston end of the electric push rod that extends into the experimental box and is fixedly provided with a moving plate, a second rotating seat that is rotatably provided on the moving plate, and a driving component for driving the first rotating seat to rotate on the experimental box.

[0008] The experimental apparatus includes a spray pipe frame installed inside the experimental chamber. The spray pipe frame is used to spray salt spray onto the outer wall of the steel pipe. An electric heating rod is detachably installed inside the experimental chamber and is coaxially placed inside the steel pipe to heat it.

[0009] Furthermore, the spray pipe frame includes a delivery pipe that runs through the experimental chamber, with one end of the delivery pipe inside the experimental chamber connected to a conduit, and a plurality of spray nozzles arrayed on the conduit.

[0010] Furthermore, the outer wall of the experimental box is provided with a mounting bracket, and an end plate is fixed on the mounting bracket by a locking fastener. A through slot is coaxially opened inside the first rotating seat, and an electric heating rod is set on the end plate and moves through the through slot.

[0011] Furthermore, a sealing gasket is provided between the mounting bracket and the end plate, and the first rotating seat is connected to the mounting bracket via a rotary joint.

[0012] Furthermore, the driving component includes a driven bevel gear fixed on the first rotating seat, and a motor is provided on the experimental box. The output shaft of the motor is fixed with a transmission bevel gear that meshes with the teeth of the driven bevel gear.

[0013] Furthermore, conical shells are fixed at the opposite ends of both the first and second rotating seats.

[0014] Furthermore, a sealing sleeve is fitted onto the outer wall of the conical shell.

[0015] Furthermore, the door of the enclosure is provided with an observation port, and tempered glass is installed inside the observation port.

[0016] The beneficial effects of this utility model are as follows:

[0017] In this invention, a steel pipe is installed inside the experimental chamber via a clamping and rotating mechanism, which can rotate the steel pipe. Salt mist is then evenly sprayed onto the outer wall of the steel pipe through a spray pipe rack. An electric heating rod heats the steel pipe from the inside. The salt mist sprayed onto the outer wall of the steel pipe evaporates more rapidly on the hot surface. The coexistence of steam and unevaporated salt mist forms a high-temperature saturated salt and humidity environment. This allows the experimental chamber to simulate the complex environment of multiple factors coupled together, such as high temperature, high humidity, and chemical corrosion, that may exist simultaneously in actual applications, thereby improving its practicality. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural cross-sectional view of the present invention;

[0020] Figure 3 This is a utility model Figure 1 Enlarged view of point A in the middle;

[0021] Figure 4 This is a utility model Figure 2 Enlarged view at point B in the middle;

[0022] Figure 5 This is a utility model Figure 2 Enlarged view of point C.

[0023] Reference numerals: 1. Experimental chamber; 2. Chamber door; 3. Clamping and rotating mechanism; 4. Experimental mechanism; 5. Mounting frame; 6. Locking fastener; 7. End plate; 8. Through groove; 9. Sealing gasket; 10. Rotary joint; 11. Conical shell; 12. Sealing sleeve; 13. Observation port; 14. Tempered glass; 301. First rotating seat; 302. Electric push rod; 303. Moving plate; 304. Second rotating seat; 305. Driving component; 3051. Driven bevel gear; 3052. Motor; 3053. Transmission bevel gear; 401. Spray pipe rack; 402. Electric heating rod; 4011. Conveying pipe; 4012. Conduit; 4013. Spray head. Detailed Implementation

[0024] 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.

[0025] like Figures 1-5 As shown, an embodiment of the present invention provides an anti-oxidation experimental device for plastic-coated steel pipes, including an experimental box 1 with a door 2 on one side. The plastic-coated steel pipes are placed inside the experimental box 1 for testing. The door 2 facilitates the removal and placement of the steel pipes, which is a distinguishing feature of the prior art of the present invention.

[0026] The distinguishing technical features of this utility model also include: a clamping and rotating mechanism 3, comprising a first rotating seat 301 that rotatably penetrates one side of the experimental chamber 1, an electric push rod 302 provided on the other side of the experimental chamber 1, the piston end of the electric push rod 302 extending into the experimental chamber 1 and fixedly mounted on a moving plate 303, preferably, the moving plate 303 is provided with a guide rod whose end movably penetrates the experimental chamber 1, which is used to guide the movement of the moving plate 303, a second rotating seat 304 rotatably mounted on the moving plate 303, and a driving member 305 provided on the experimental chamber 1 for driving the first rotating seat 301 to rotate, in the case of steel pipes (specifically those with plastic coating on the outer wall). When conducting the experiment with the steel pipe, open the box door 2, place the steel pipe inside the experimental box 1, and position the steel pipe between the first rotating seat 301 and the second rotating seat 304. The electric push rod 302 performs work, and its piston end drives the moving plate 303 to move closer to the steel pipe, so that the first rotating seat 301 and the second rotating seat 304 respectively come into contact with the two ends of the steel pipe, thereby clamping and fixing the steel pipe. After the steel pipe is fixed, close the box door 2, and drive the first rotating seat 301 to rotate through the drive component 305. Since the first rotating seat 301 cooperates with the second rotating seat 304 to clamp and fix the steel pipe, it drives the steel pipe to rotate, which facilitates subsequent experiments.

[0027] Experimental apparatus 4 includes a spray pipe frame 401 installed inside experimental chamber 1. The spray pipe frame 401 is used to spray salt spray onto the outer wall of a steel pipe. An electric heating rod 402 is detachably installed inside experimental chamber 1. The electric heating rod 402 is coaxially placed inside the steel pipe to heat it. After the steel pipe is fixed, the electric heating rod 402 is installed and positioned inside the steel pipe. Preferably, the spray pipe frame 401 is connected to an external storage mechanism (a container for storing salt spray solution). A delivery pump delivers salt spray to the spray pipe frame 401. As the steel pipe rotates, the spray pipe frame 401 can evenly spray salt spray onto the surface of the steel pipe. Preferably, the experimental chamber... The bottom of 1 is connected to a drain pipe to facilitate the discharge of excess salt spray liquid. Before spraying salt spray, the electric heating rod 402 is energized and heated. It conducts heat to the steel pipe through the air inside the steel pipe, thereby heating the steel pipe. When spraying salt spray, the salt spray sprayed on the outer wall of the steel pipe will evaporate more rapidly on the hot surface. The steam and the unevaporated salt spray coexist to form a high-temperature saturated salt and humid environment. Preferably, the actual heating temperature is between 60 and 100°C, which can truly reflect the "heat + salt spray" coupled corrosion, so that the experimental chamber 1 simulates the complex environment of multiple factors coupled together, such as high temperature, high humidity, and chemical media corrosion, which may exist at the same time in actual applications.

[0028] In this scheme, the steel pipe is installed in the experimental chamber 1 through the clamping and rotating mechanism 3, which can drive the steel pipe to rotate. Salt spray is evenly sprayed onto the outer wall of the steel pipe through the spray pipe frame 401. The electric heating rod 402 heats the steel pipe from the inside. The salt spray on the outer wall of the steel pipe will evaporate more rapidly on the hot surface. The coexistence of steam and unevaporated salt spray forms a high-temperature saturated salt and humidity environment. This allows the experimental chamber 1 to simulate the complex environment of multiple factors coupled together, such as high temperature, high humidity, and chemical media corrosion, which may exist simultaneously in actual applications, thereby improving practicality.

[0029] like Figure 2 As shown, the specific structure of the spray pipe frame 401 of this utility model is disclosed. The spray pipe frame 401 includes a conveying pipe 4011 that runs through the experimental chamber 1. One end of the conveying pipe 4011 located inside the experimental chamber 1 is connected to a conduit 4012. Several nozzles 4013 are arrayed and connected on the conduit 4012. In actual use, the conveying pipe 4011 is connected to an external storage mechanism (a container for storing salt spray liquid). The salt spray is conveyed through the conveying pipe 4011 to the conduit 4012 and then sprayed out from the several nozzles 4013. With the rotation of the steel pipe, the salt spray can be evenly sprayed on the surface of the steel pipe.

[0030] like Figure 3 and Figure 4As shown, a further technical solution for the installation and disassembly of the electric heating rod 402 is disclosed. The outer wall of the experimental chamber 1 is provided with an installation frame 5. An end plate 7 is fixed on the installation frame 5 by a locking fastener 6. A through groove 8 is coaxially opened in the first rotating seat 301. The electric heating rod 402 is set on the end plate 7 and moves through the through groove 8. After the steel pipe is fixed, the electric heating rod 402 is inserted into the steel pipe through the through groove 8, so that the end plate 7 is attached to the installation frame 5. Then, the installation frame 5 and the end plate 7 are fixed by the locking fastener 6, so that the rotation of the steel pipe and the first rotating seat 301 does not affect the electric heating rod 402. After the experiment is completed, the locking fastener 6 is released from the end plate 7, and the electric heating rod 402 is pulled out of the steel pipe, so that the steel pipe can be removed.

[0031] like Figure 4 As shown, a further technical solution for heating the electric heating rod 402 according to this utility model is disclosed. A sealing gasket 9 is provided between the mounting frame 5 and the end plate 7. The first rotating seat 301 is connected to the mounting frame 5 through a rotary joint 10. By providing the sealing gasket 9, the sealing performance between the mounting frame 5 and the end plate 7 is improved. By providing the rotary joint 10, the first rotating seat 301 is rotatably connected to the mounting frame 5, and the sealing performance of the connection point is also improved. This makes it difficult for heat to escape from the experimental chamber 1 when the electric heating rod 402 is heated, thereby improving its practicality.

[0032] like Figure 3 As shown, the specific structure of the driving component 305 of this utility model is disclosed. The driving component 305 includes a driven bevel gear 3051 fixed on the first rotating seat 301. A motor 3052 is provided on the experimental box 1. The output shaft of the motor 3052 is fixed with a transmission bevel gear 3053 that meshes with the teeth of the driven bevel gear 3051. When the motor 3052 does work, its output shaft drives the transmission bevel gear 3053 to rotate. Through the meshing of the teeth of the transmission bevel gear 3053 and the driven bevel gear 3051, the first rotating seat 301 is driven to rotate. The design of the driving component 305 can not only drive the steel pipe to rotate, but also does not affect the normal installation and operation of the electric heating rod 402.

[0033] like Figure 5 As shown, a further technical solution for fixing steel pipes according to this utility model is disclosed. Conical shells 11 are fixed at the opposite ends of the first rotating seat 301 and the second rotating seat 304. By setting the conical shells 11, when fixing the steel pipe, the two conical shells 11 are respectively inserted at both ends of the steel pipe. The end of the steel pipe abuts and overlaps with the outer conical surface of the conical shell 11. Through the conical abutment and overlap, not only can steel pipes of different sizes be fixed, but the steel pipe can also be positioned and centered to ensure that its outer wall is effectively and evenly sprayed with salt spray.

[0034] like Figure 5As shown, a further technical solution for fixing the steel pipe is disclosed in this utility model. A sealing sleeve 12 is provided on the outer wall of the conical shell 11. By setting the sealing sleeve 12, the end of the steel pipe abuts against the sealing sleeve 12 when fixing the steel pipe. This not only further improves the stability of fixing the steel pipe, but also improves the sealing between the steel pipe and the conical shell 11, preventing salt spray from seeping into the interior of the steel pipe and affecting the electric heating rod 402.

[0035] like Figure 1 As shown, the present invention discloses a further technical solution for the door 2 of the box. The door 2 is provided with an observation port 13, and a tempered glass 14 is provided inside the observation port 13. By opening the observation port 13 on the door 2 and providing the tempered glass 14 inside the observation port 13, it is convenient for staff to observe the actual experimental situation of the steel pipe, thereby improving its practicality.

[0036] 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. An experimental apparatus for anti-oxidation of plastic-coated steel pipes, comprising an experimental chamber (1) with a door (2) on one side, characterized in that, Also includes: The clamping and rotating mechanism (3) includes a first rotating seat (301) that rotates through one side of the experimental box (1), an electric push rod (302) is provided on the other side of the experimental box (1), the piston end of the electric push rod (302) extends into the experimental box (1) and is fixedly provided with a moving plate (303), a second rotating seat (304) is rotatably provided on the moving plate (303), and a driving component (305) for driving the first rotating seat (301) to rotate is provided on the experimental box (1). The experimental apparatus (4) includes a spray pipe rack (401) set inside the experimental chamber (1). The spray pipe rack (401) is used to spray salt spray onto the outer wall of the steel pipe. An electric heating rod (402) is detachably installed inside the experimental chamber (1). The electric heating rod (402) is coaxially placed inside the steel pipe to heat it.

2. The anti-oxidation experimental device for plastic-coated steel pipes according to claim 1, characterized in that, The spray pipe rack (401) includes a delivery pipe (4011) that runs through the experimental chamber (1). One end of the delivery pipe (4011) inside the experimental chamber (1) is connected to a conduit (4012), and a plurality of nozzles (4013) are arrayed on the conduit (4012).

3. The anti-oxidation experimental device for plastic-coated steel pipes according to claim 1, characterized in that, The outer wall of the experimental box (1) is provided with a mounting frame (5), and an end plate (7) is fixed on the mounting frame (5) by a locking fastener (6). A through slot (8) is coaxially opened in the first rotating seat (301), and an electric heating rod (402) is set on the end plate (7) and moves through the through slot (8).

4. The anti-oxidation experimental device for plastic-coated steel pipes according to claim 3, characterized in that, A sealing gasket (9) is provided between the mounting bracket (5) and the end plate (7), and the first rotating seat (301) is connected to the mounting bracket (5) through a rotating joint (10).

5. The anti-oxidation experimental device for plastic-coated steel pipes according to claim 1, characterized in that, The driving component (305) includes a driven bevel gear (3051) fixed on the first rotating seat (301), and a motor (3052) is provided on the experimental box (1). The output shaft of the motor (3052) is fixed with a transmission bevel gear (3053) that meshes with the teeth of the driven bevel gear (3051).

6. The experimental apparatus for anti-oxidation of plastic-coated steel pipes according to claim 1, characterized in that, The first rotating seat (301) and the second rotating seat (304) are both fixed with conical shells (11) at their opposite ends.

7. The anti-oxidation experimental apparatus for plastic-coated steel pipes according to claim 6, characterized in that, The outer wall of the conical shell (11) is fitted with a sealing sleeve (12).

8. The anti-oxidation experimental apparatus for plastic-coated steel pipes according to claim 1, characterized in that, The door (2) is provided with an observation port (13), and a tempered glass (14) is provided inside the observation port (13).

Images